From bb45edc8c33e6be48750c304adbd344a4f8673aa Mon Sep 17 00:00:00 2001 From: Akihiro Suda Date: Tue, 4 May 2021 17:46:26 +0900 Subject: [PATCH] Bump stargz snapshotter to v0.5.0 Signed-off-by: Akihiro Suda --- Dockerfile | 2 +- go.mod | 2 +- go.sum | 22 +- vendor/github.com/beorn7/perks/LICENSE | 20 + .../beorn7/perks/quantile/exampledata.txt | 2388 ++++++ .../beorn7/perks/quantile/stream.go | 316 + .../github.com/cespare/xxhash/v2/.travis.yml | 8 + .../github.com/cespare/xxhash/v2/LICENSE.txt | 22 + vendor/github.com/cespare/xxhash/v2/README.md | 67 + vendor/github.com/cespare/xxhash/v2/go.mod | 3 + vendor/github.com/cespare/xxhash/v2/go.sum | 0 vendor/github.com/cespare/xxhash/v2/xxhash.go | 236 + .../cespare/xxhash/v2/xxhash_amd64.go | 13 + .../cespare/xxhash/v2/xxhash_amd64.s | 215 + .../cespare/xxhash/v2/xxhash_other.go | 76 + .../cespare/xxhash/v2/xxhash_safe.go | 15 + .../cespare/xxhash/v2/xxhash_unsafe.go | 46 + .../stargz-snapshotter/cache/cache.go | 235 +- .../stargz-snapshotter/estargz/types.go | 6 +- .../stargz-snapshotter/fs/config/config.go | 1 + .../containerd/stargz-snapshotter/fs/fs.go | 433 +- .../stargz-snapshotter/fs/layer/layer.go | 450 ++ .../stargz-snapshotter/fs/metrics/layer.go | 52 + .../stargz-snapshotter/fs/metrics/metrics.go | 113 + .../stargz-snapshotter/fs/remote/resolver.go | 11 +- .../stargz-snapshotter/snapshot/snapshot.go | 14 +- .../util/lrucache/lrucache.go | 141 + .../util/namedmutex/namedmutex.go | 62 + .../docker/go-metrics/CONTRIBUTING.md | 55 + vendor/github.com/docker/go-metrics/LICENSE | 191 + .../github.com/docker/go-metrics/LICENSE.docs | 425 ++ vendor/github.com/docker/go-metrics/NOTICE | 16 + vendor/github.com/docker/go-metrics/README.md | 91 + .../github.com/docker/go-metrics/counter.go | 52 + vendor/github.com/docker/go-metrics/docs.go | 3 + vendor/github.com/docker/go-metrics/gauge.go | 72 + vendor/github.com/docker/go-metrics/go.mod | 5 + vendor/github.com/docker/go-metrics/go.sum | 67 + 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.../client_golang/prometheus/doc.go | 199 + .../prometheus/expvar_collector.go | 119 + .../client_golang/prometheus/fnv.go | 42 + .../client_golang/prometheus/gauge.go | 289 + .../client_golang/prometheus/go_collector.go | 396 + .../client_golang/prometheus/histogram.go | 637 ++ .../prometheus/internal/metric.go | 85 + .../client_golang/prometheus/labels.go | 87 + .../client_golang/prometheus/metric.go | 176 + .../client_golang/prometheus/observer.go | 64 + .../prometheus/process_collector.go | 151 + .../prometheus/process_collector_other.go | 65 + .../prometheus/process_collector_windows.go | 116 + .../prometheus/promhttp/delegator.go | 370 + .../client_golang/prometheus/promhttp/http.go | 379 + .../prometheus/promhttp/instrument_client.go | 219 + .../prometheus/promhttp/instrument_server.go | 447 ++ .../client_golang/prometheus/registry.go | 948 +++ .../client_golang/prometheus/summary.go | 737 ++ .../client_golang/prometheus/timer.go | 54 + .../client_golang/prometheus/untyped.go | 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.../prometheus/common/model/labels.go | 210 + .../prometheus/common/model/labelset.go | 169 + .../prometheus/common/model/metric.go | 102 + .../prometheus/common/model/model.go | 16 + .../prometheus/common/model/signature.go | 144 + .../prometheus/common/model/silence.go | 106 + .../prometheus/common/model/time.go | 274 + .../prometheus/common/model/value.go | 416 ++ .../github.com/prometheus/procfs/.gitignore | 1 + .../prometheus/procfs/.golangci.yml | 4 + .../prometheus/procfs/CODE_OF_CONDUCT.md | 3 + .../prometheus/procfs/CONTRIBUTING.md | 121 + vendor/github.com/prometheus/procfs/LICENSE | 201 + .../prometheus/procfs/MAINTAINERS.md | 2 + vendor/github.com/prometheus/procfs/Makefile | 29 + .../prometheus/procfs/Makefile.common | 302 + vendor/github.com/prometheus/procfs/NOTICE | 7 + vendor/github.com/prometheus/procfs/README.md | 61 + .../github.com/prometheus/procfs/SECURITY.md | 6 + vendor/github.com/prometheus/procfs/arp.go | 85 + .../github.com/prometheus/procfs/buddyinfo.go | 85 + .../github.com/prometheus/procfs/cpuinfo.go | 481 ++ .../prometheus/procfs/cpuinfo_armx.go | 19 + .../prometheus/procfs/cpuinfo_mipsx.go | 19 + .../prometheus/procfs/cpuinfo_others.go | 19 + .../prometheus/procfs/cpuinfo_ppcx.go | 19 + .../prometheus/procfs/cpuinfo_riscvx.go | 19 + .../prometheus/procfs/cpuinfo_s390x.go | 18 + .../prometheus/procfs/cpuinfo_x86.go | 19 + vendor/github.com/prometheus/procfs/crypto.go | 153 + vendor/github.com/prometheus/procfs/doc.go | 45 + .../prometheus/procfs/fixtures.ttar | 6553 +++++++++++++++++ vendor/github.com/prometheus/procfs/fs.go | 43 + .../github.com/prometheus/procfs/fscache.go | 422 ++ vendor/github.com/prometheus/procfs/go.mod | 9 + vendor/github.com/prometheus/procfs/go.sum | 8 + .../prometheus/procfs/internal/fs/fs.go | 55 + .../prometheus/procfs/internal/util/parse.go | 97 + .../procfs/internal/util/readfile.go | 38 + .../procfs/internal/util/sysreadfile.go | 48 + .../internal/util/sysreadfile_compat.go | 26 + .../procfs/internal/util/valueparser.go | 91 + vendor/github.com/prometheus/procfs/ipvs.go | 241 + .../prometheus/procfs/kernel_random.go | 62 + .../github.com/prometheus/procfs/loadavg.go | 62 + vendor/github.com/prometheus/procfs/mdstat.go | 213 + .../github.com/prometheus/procfs/meminfo.go | 277 + .../github.com/prometheus/procfs/mountinfo.go | 180 + .../prometheus/procfs/mountstats.go | 638 ++ .../prometheus/procfs/net_conntrackstat.go | 153 + .../github.com/prometheus/procfs/net_dev.go | 205 + .../prometheus/procfs/net_ip_socket.go | 220 + .../prometheus/procfs/net_protocols.go | 180 + .../prometheus/procfs/net_sockstat.go | 163 + .../prometheus/procfs/net_softnet.go | 102 + .../github.com/prometheus/procfs/net_tcp.go | 64 + .../github.com/prometheus/procfs/net_udp.go | 64 + .../github.com/prometheus/procfs/net_unix.go | 257 + vendor/github.com/prometheus/procfs/proc.go | 319 + .../prometheus/procfs/proc_cgroup.go | 98 + .../prometheus/procfs/proc_environ.go | 37 + .../prometheus/procfs/proc_fdinfo.go | 133 + .../github.com/prometheus/procfs/proc_io.go | 59 + .../prometheus/procfs/proc_limits.go | 160 + .../github.com/prometheus/procfs/proc_maps.go | 209 + .../github.com/prometheus/procfs/proc_ns.go | 68 + .../github.com/prometheus/procfs/proc_psi.go | 100 + .../prometheus/procfs/proc_smaps.go | 165 + .../github.com/prometheus/procfs/proc_stat.go | 189 + .../prometheus/procfs/proc_status.go | 170 + .../github.com/prometheus/procfs/schedstat.go | 121 + vendor/github.com/prometheus/procfs/slab.go | 151 + vendor/github.com/prometheus/procfs/stat.go | 244 + vendor/github.com/prometheus/procfs/swaps.go | 89 + vendor/github.com/prometheus/procfs/ttar | 413 ++ vendor/github.com/prometheus/procfs/vm.go | 210 + vendor/github.com/prometheus/procfs/xfrm.go | 186 + .../github.com/prometheus/procfs/zoneinfo.go | 196 + vendor/modules.txt | 30 +- 180 files changed, 34772 insertions(+), 503 deletions(-) create mode 100644 vendor/github.com/beorn7/perks/LICENSE create mode 100644 vendor/github.com/beorn7/perks/quantile/exampledata.txt create mode 100644 vendor/github.com/beorn7/perks/quantile/stream.go create mode 100644 vendor/github.com/cespare/xxhash/v2/.travis.yml create mode 100644 vendor/github.com/cespare/xxhash/v2/LICENSE.txt create mode 100644 vendor/github.com/cespare/xxhash/v2/README.md create mode 100644 vendor/github.com/cespare/xxhash/v2/go.mod create mode 100644 vendor/github.com/cespare/xxhash/v2/go.sum create mode 100644 vendor/github.com/cespare/xxhash/v2/xxhash.go create mode 100644 vendor/github.com/cespare/xxhash/v2/xxhash_amd64.go create mode 100644 vendor/github.com/cespare/xxhash/v2/xxhash_amd64.s create mode 100644 vendor/github.com/cespare/xxhash/v2/xxhash_other.go create mode 100644 vendor/github.com/cespare/xxhash/v2/xxhash_safe.go create mode 100644 vendor/github.com/cespare/xxhash/v2/xxhash_unsafe.go create mode 100644 vendor/github.com/containerd/stargz-snapshotter/fs/layer/layer.go create mode 100644 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vendor/github.com/prometheus/procfs/proc_ns.go create mode 100644 vendor/github.com/prometheus/procfs/proc_psi.go create mode 100644 vendor/github.com/prometheus/procfs/proc_smaps.go create mode 100644 vendor/github.com/prometheus/procfs/proc_stat.go create mode 100644 vendor/github.com/prometheus/procfs/proc_status.go create mode 100644 vendor/github.com/prometheus/procfs/schedstat.go create mode 100644 vendor/github.com/prometheus/procfs/slab.go create mode 100644 vendor/github.com/prometheus/procfs/stat.go create mode 100644 vendor/github.com/prometheus/procfs/swaps.go create mode 100644 vendor/github.com/prometheus/procfs/ttar create mode 100644 vendor/github.com/prometheus/procfs/vm.go create mode 100644 vendor/github.com/prometheus/procfs/xfrm.go create mode 100644 vendor/github.com/prometheus/procfs/zoneinfo.go diff --git a/Dockerfile b/Dockerfile index a1826e66..1805c066 100644 --- a/Dockerfile +++ b/Dockerfile @@ -11,7 +11,7 @@ ARG ROOTLESSKIT_VERSION=v0.14.2 ARG CNI_VERSION=v0.9.1 ARG SHADOW_VERSION=4.8.1 ARG FUSEOVERLAYFS_VERSION=v1.5.0 -ARG STARGZ_SNAPSHOTTER_VERSION=v0.4.1 +ARG STARGZ_SNAPSHOTTER_VERSION=v0.5.0 ARG ALPINE_VERSION=3.12 diff --git a/go.mod b/go.mod index 19dc885b..0ddcd15a 100644 --- a/go.mod +++ b/go.mod @@ -13,7 +13,7 @@ require ( github.com/containerd/fuse-overlayfs-snapshotter v1.0.2 github.com/containerd/go-cni v1.0.2 github.com/containerd/go-runc v1.0.0 - github.com/containerd/stargz-snapshotter v0.4.1 + github.com/containerd/stargz-snapshotter v0.5.0 github.com/containerd/typeurl v1.0.2 github.com/coreos/go-systemd/v22 v22.1.0 github.com/docker/cli v20.10.5+incompatible diff --git a/go.sum b/go.sum index e21e9c8d..14befafd 100644 --- a/go.sum +++ b/go.sum @@ -72,6 +72,7 @@ github.com/aws/aws-sdk-go v1.15.11/go.mod h1:mFuSZ37Z9YOHbQEwBWztmVzqXrEkub65tZo github.com/beorn7/perks v0.0.0-20160804104726-4c0e84591b9a/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q= github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q= github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+CedLV8= +github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM= github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw= github.com/bgentry/speakeasy v0.1.0/go.mod h1:+zsyZBPWlz7T6j88CTgSN5bM796AkVf0kBD4zp0CCIs= github.com/bitly/go-simplejson v0.5.0/go.mod h1:cXHtHw4XUPsvGaxgjIAn8PhEWG9NfngEKAMDJEczWVA= @@ -84,7 +85,9 @@ github.com/bugsnag/bugsnag-go v0.0.0-20141110184014-b1d153021fcd/go.mod h1:2oa8n github.com/bugsnag/osext v0.0.0-20130617224835-0dd3f918b21b/go.mod h1:obH5gd0BsqsP2LwDJ9aOkm/6J86V6lyAXCoQWGw3K50= github.com/bugsnag/panicwrap v0.0.0-20151223152923-e2c28503fcd0/go.mod h1:D/8v3kj0zr8ZAKg1AQ6crr+5VwKN5eIywRkfhyM/+dE= github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU= +github.com/cespare/xxhash v1.1.0 h1:a6HrQnmkObjyL+Gs60czilIUGqrzKutQD6XZog3p+ko= github.com/cespare/xxhash v1.1.0/go.mod h1:XrSqR1VqqWfGrhpAt58auRo0WTKS1nRRg3ghfAqPWnc= +github.com/cespare/xxhash/v2 v2.1.1 h1:6MnRN8NT7+YBpUIWxHtefFZOKTAPgGjpQSxqLNn0+qY= github.com/cespare/xxhash/v2 v2.1.1/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs= github.com/checkpoint-restore/go-criu/v4 v4.1.0/go.mod h1:xUQBLp4RLc5zJtWY++yjOoMoB5lihDt7fai+75m+rGw= github.com/chzyer/logex v1.1.10/go.mod h1:+Ywpsq7O8HXn0nuIou7OrIPyXbp3wmkHB+jjWRnGsAI= @@ -116,7 +119,6 @@ github.com/containerd/cgroups v1.0.1/go.mod h1:0SJrPIenamHDcZhEcJMNBB85rHcUsw4f2 github.com/containerd/console v0.0.0-20180822173158-c12b1e7919c1/go.mod h1:Tj/on1eG8kiEhd0+fhSDzsPAFESxzBBvdyEgyryXffw= github.com/containerd/console v0.0.0-20181022165439-0650fd9eeb50/go.mod h1:Tj/on1eG8kiEhd0+fhSDzsPAFESxzBBvdyEgyryXffw= github.com/containerd/console v0.0.0-20191206165004-02ecf6a7291e/go.mod h1:8Pf4gM6VEbTNRIT26AyyU7hxdQU3MvAvxVI0sc00XBE= -github.com/containerd/console v1.0.0/go.mod h1:8Pf4gM6VEbTNRIT26AyyU7hxdQU3MvAvxVI0sc00XBE= github.com/containerd/console v1.0.1/go.mod h1:XUsP6YE/mKtz6bxc+I8UiKKTP04qjQL4qcS3XoQ5xkw= github.com/containerd/console v1.0.2 h1:Pi6D+aZXM+oUw1czuKgH5IJ+y0jhYcwBJfx5/Ghn9dE= github.com/containerd/console v1.0.2/go.mod h1:ytZPjGgY2oeTkAONYafi2kSj0aYggsf8acV1PGKCbzQ= @@ -128,7 +130,6 @@ github.com/containerd/containerd v1.3.2/go.mod h1:bC6axHOhabU15QhwfG7w5PipXdVtMX github.com/containerd/containerd v1.4.0-beta.2.0.20200729163537-40b22ef07410/go.mod h1:bC6axHOhabU15QhwfG7w5PipXdVtMXFTttgp+kVtyUA= github.com/containerd/containerd v1.4.1/go.mod h1:bC6axHOhabU15QhwfG7w5PipXdVtMXFTttgp+kVtyUA= github.com/containerd/containerd v1.4.3/go.mod h1:bC6axHOhabU15QhwfG7w5PipXdVtMXFTttgp+kVtyUA= -github.com/containerd/containerd v1.5.0-beta.0.0.20210122062454-5a66c2ae5cec/go.mod h1:p9z+oqCID32tZ7LKgej316N9pJf1iIkQ/7nK1VvEFZE= github.com/containerd/containerd v1.5.0-beta.1/go.mod h1:5HfvG1V2FsKesEGQ17k5/T7V960Tmcumvqn8Mc+pCYQ= github.com/containerd/containerd v1.5.0-beta.3/go.mod h1:/wr9AVtEM7x9c+n0+stptlo/uBBoBORwEx6ardVcmKU= github.com/containerd/containerd v1.5.0-beta.4/go.mod h1:GmdgZd2zA2GYIBZ0w09ZvgqEq8EfBp/m3lcVZIvPHhI= @@ -168,10 +169,10 @@ github.com/containerd/imgcrypt v1.1.1/go.mod h1:xpLnwiQmEUJPvQoAapeb2SNCxz7Xr6PJ github.com/containerd/nri v0.0.0-20201007170849-eb1350a75164/go.mod h1:+2wGSDGFYfE5+So4M5syatU0N0f0LbWpuqyMi4/BE8c= github.com/containerd/nri v0.0.0-20210316161719-dbaa18c31c14/go.mod h1:lmxnXF6oMkbqs39FiCt1s0R2HSMhcLel9vNL3m4AaeY= github.com/containerd/nri v0.1.0/go.mod h1:lmxnXF6oMkbqs39FiCt1s0R2HSMhcLel9vNL3m4AaeY= -github.com/containerd/stargz-snapshotter v0.4.1 h1:YS3ZC4M+doc5NKXdnGdd8LlcYCC0s8o/GsCTJTYk7Ew= -github.com/containerd/stargz-snapshotter v0.4.1/go.mod h1:H59SY9Rw+vkIfWtuuyjeLeAc7uuALmuvUdAS6w+xmEw= -github.com/containerd/stargz-snapshotter/estargz v0.4.1 h1:5e7heayhB7CcgdTkqfZqrNaNv15gABwr3Q2jBTbLlt4= -github.com/containerd/stargz-snapshotter/estargz v0.4.1/go.mod h1:x7Q9dg9QYb4+ELgxmo4gBUeJB0tl5dqH1Sdz0nJU1QM= +github.com/containerd/stargz-snapshotter v0.5.0 h1:JcffikoW/RjJ+9kfYyiqmaKvI6lUuiPmSAKVInHQ4i0= +github.com/containerd/stargz-snapshotter v0.5.0/go.mod h1:4MqZBKHJQeqJHcofN65D5kK2lKzjtd1bK6gT9Qm4WFY= +github.com/containerd/stargz-snapshotter/estargz v0.5.0 h1:mtV2MU17r1MmXJIS9uUUNg5m/XU0a/gsnmznkZRkA3s= +github.com/containerd/stargz-snapshotter/estargz v0.5.0/go.mod h1:x7Q9dg9QYb4+ELgxmo4gBUeJB0tl5dqH1Sdz0nJU1QM= github.com/containerd/ttrpc v0.0.0-20190828154514-0e0f228740de/go.mod h1:PvCDdDGpgqzQIzDW1TphrGLssLDZp2GuS+X5DkEJB8o= github.com/containerd/ttrpc v0.0.0-20190828172938-92c8520ef9f8/go.mod h1:PvCDdDGpgqzQIzDW1TphrGLssLDZp2GuS+X5DkEJB8o= github.com/containerd/ttrpc v0.0.0-20191028202541-4f1b8fe65a5c/go.mod h1:LPm1u0xBw8r8NOKoOdNMeVHSawSsltak+Ihv+etqsE8= @@ -252,6 +253,7 @@ github.com/docker/go-events v0.0.0-20170721190031-9461782956ad/go.mod h1:Uw6Uezg github.com/docker/go-events v0.0.0-20190806004212-e31b211e4f1c h1:+pKlWGMw7gf6bQ+oDZB4KHQFypsfjYlq/C4rfL7D3g8= github.com/docker/go-events v0.0.0-20190806004212-e31b211e4f1c/go.mod h1:Uw6UezgYA44ePAFQYUehOuCzmy5zmg/+nl2ZfMWGkpA= github.com/docker/go-metrics v0.0.0-20180209012529-399ea8c73916/go.mod h1:/u0gXw0Gay3ceNrsHubL3BtdOL2fHf93USgMTe0W5dI= +github.com/docker/go-metrics v0.0.1 h1:AgB/0SvBxihN0X8OR4SjsblXkbMvalQ8cjmtKQ2rQV8= github.com/docker/go-metrics v0.0.1/go.mod h1:cG1hvH2utMXtqgqqYE9plW6lDxS3/5ayHzueweSI3Vw= github.com/docker/go-units v0.4.0 h1:3uh0PgVws3nIA0Q+MwDC8yjEPf9zjRfZZWXZYDct3Tw= github.com/docker/go-units v0.4.0/go.mod h1:fgPhTUdO+D/Jk86RDLlptpiXQzgHJF7gydDDbaIK4Dk= @@ -440,6 +442,7 @@ github.com/mattn/go-isatty v0.0.4/go.mod h1:M+lRXTBqGeGNdLjl/ufCoiOlB5xdOkqRJdNx github.com/mattn/go-runewidth v0.0.2/go.mod h1:LwmH8dsx7+W8Uxz3IHJYH5QSwggIsqBzpuz5H//U1FU= github.com/mattn/go-shellwords v1.0.3/go.mod h1:3xCvwCdWdlDJUrvuMn7Wuy9eWs4pE8vqg+NOMyg4B2o= github.com/matttproud/golang_protobuf_extensions v1.0.1/go.mod h1:D8He9yQNgCq6Z5Ld7szi9bcBfOoFv/3dc6xSMkL2PC0= +github.com/matttproud/golang_protobuf_extensions v1.0.2-0.20181231171920-c182affec369 h1:I0XW9+e1XWDxdcEniV4rQAIOPUGDq67JSCiRCgGCZLI= github.com/matttproud/golang_protobuf_extensions v1.0.2-0.20181231171920-c182affec369/go.mod h1:BSXmuO+STAnVfrANrmjBb36TMTDstsz7MSK+HVaYKv4= github.com/miekg/pkcs11 v1.0.3/go.mod h1:XsNlhZGX73bx86s2hdc/FuaLm2CPZJemRLMA+WTFxgs= github.com/mistifyio/go-zfs v2.1.2-0.20190413222219-f784269be439+incompatible/go.mod h1:8AuVvqP/mXw1px98n46wfvcGfQ4ci2FwoAjKYxuo3Z4= @@ -468,7 +471,6 @@ github.com/modern-go/reflect2 v0.0.0-20180701023420-4b7aa43c6742/go.mod h1:bx2lN github.com/modern-go/reflect2 v1.0.1/go.mod h1:bx2lNnkwVCuqBIxFjflWJWanXIb3RllmbCylyMrvgv0= github.com/morikuni/aec v1.0.0 h1:nP9CBfwrvYnBRgY6qfDQkygYDmYwOilePFkwzv4dU8A= github.com/morikuni/aec v1.0.0/go.mod h1:BbKIizmSmc5MMPqRYbxO4ZU0S0+P200+tUnFx7PXmsc= -github.com/mrunalp/fileutils v0.0.0-20200520151820-abd8a0e76976/go.mod h1:x8F1gnqOkIEiO4rqoeEEEqQbo7HjGMTvyoq3gej4iT0= github.com/mrunalp/fileutils v0.5.0/go.mod h1:M1WthSahJixYnrXQl/DFQuteStB1weuxD2QJNHXfbSQ= github.com/munnerz/goautoneg v0.0.0-20120707110453-a547fc61f48d/go.mod h1:+n7T8mK8HuQTcFwEeznm/DIxMOiR9yIdICNftLE1DvQ= github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822/go.mod h1:+n7T8mK8HuQTcFwEeznm/DIxMOiR9yIdICNftLE1DvQ= @@ -511,14 +513,12 @@ github.com/opencontainers/runc v0.1.1/go.mod h1:qT5XzbpPznkRYVz/mWwUaVBUv2rmF59P github.com/opencontainers/runc v1.0.0-rc10/go.mod h1:qT5XzbpPznkRYVz/mWwUaVBUv2rmF59PVA73FjuZG0U= github.com/opencontainers/runc v1.0.0-rc8.0.20190926000215-3e425f80a8c9/go.mod h1:qT5XzbpPznkRYVz/mWwUaVBUv2rmF59PVA73FjuZG0U= github.com/opencontainers/runc v1.0.0-rc9/go.mod h1:qT5XzbpPznkRYVz/mWwUaVBUv2rmF59PVA73FjuZG0U= -github.com/opencontainers/runc v1.0.0-rc92/go.mod h1:X1zlU4p7wOlX4+WRCz+hvlRv8phdL7UqbYD+vQwNMmE= github.com/opencontainers/runc v1.0.0-rc93 h1:x2UMpOOVf3kQ8arv/EsDGwim8PTNqzL1/EYDr/+scOM= github.com/opencontainers/runc v1.0.0-rc93/go.mod h1:3NOsor4w32B2tC0Zbl8Knk4Wg84SM2ImC1fxBuqJ/H0= github.com/opencontainers/runtime-spec v0.1.2-0.20190507144316-5b71a03e2700/go.mod h1:jwyrGlmzljRJv/Fgzds9SsS/C5hL+LL3ko9hs6T5lQ0= github.com/opencontainers/runtime-spec v1.0.1/go.mod h1:jwyrGlmzljRJv/Fgzds9SsS/C5hL+LL3ko9hs6T5lQ0= github.com/opencontainers/runtime-spec v1.0.2-0.20190207185410-29686dbc5559/go.mod h1:jwyrGlmzljRJv/Fgzds9SsS/C5hL+LL3ko9hs6T5lQ0= github.com/opencontainers/runtime-spec v1.0.2/go.mod h1:jwyrGlmzljRJv/Fgzds9SsS/C5hL+LL3ko9hs6T5lQ0= -github.com/opencontainers/runtime-spec v1.0.3-0.20200728170252-4d89ac9fbff6/go.mod h1:jwyrGlmzljRJv/Fgzds9SsS/C5hL+LL3ko9hs6T5lQ0= github.com/opencontainers/runtime-spec v1.0.3-0.20200929063507-e6143ca7d51d h1:pNa8metDkwZjb9g4T8s+krQ+HRgZAkqnXml+wNir/+s= github.com/opencontainers/runtime-spec v1.0.3-0.20200929063507-e6143ca7d51d/go.mod h1:jwyrGlmzljRJv/Fgzds9SsS/C5hL+LL3ko9hs6T5lQ0= github.com/opencontainers/runtime-tools v0.0.0-20181011054405-1d69bd0f9c39/go.mod h1:r3f7wjNzSs2extwzU3Y+6pKfobzPh+kKFJ3ofN+3nfs= @@ -548,17 +548,20 @@ github.com/prometheus/client_golang v0.9.1/go.mod h1:7SWBe2y4D6OKWSNQJUaRYU/AaXP github.com/prometheus/client_golang v0.9.3/go.mod h1:/TN21ttK/J9q6uSwhBd54HahCDft0ttaMvbicHlPoso= github.com/prometheus/client_golang v1.0.0/go.mod h1:db9x61etRT2tGnBNRi70OPL5FsnadC4Ky3P0J6CfImo= github.com/prometheus/client_golang v1.1.0/go.mod h1:I1FGZT9+L76gKKOs5djB6ezCbFQP1xR9D75/vuwEF3g= +github.com/prometheus/client_golang v1.7.1 h1:NTGy1Ja9pByO+xAeH/qiWnLrKtr3hJPNjaVUwnjpdpA= github.com/prometheus/client_golang v1.7.1/go.mod h1:PY5Wy2awLA44sXw4AOSfFBetzPP4j5+D6mVACh+pe2M= github.com/prometheus/client_model v0.0.0-20171117100541-99fa1f4be8e5/go.mod h1:MbSGuTsp3dbXC40dX6PRTWyKYBIrTGTE9sqQNg2J8bo= github.com/prometheus/client_model v0.0.0-20180712105110-5c3871d89910/go.mod h1:MbSGuTsp3dbXC40dX6PRTWyKYBIrTGTE9sqQNg2J8bo= github.com/prometheus/client_model v0.0.0-20190129233127-fd36f4220a90/go.mod h1:xMI15A0UPsDsEKsMN9yxemIoYk6Tm2C1GtYGdfGttqA= github.com/prometheus/client_model v0.0.0-20190812154241-14fe0d1b01d4/go.mod h1:xMI15A0UPsDsEKsMN9yxemIoYk6Tm2C1GtYGdfGttqA= +github.com/prometheus/client_model v0.2.0 h1:uq5h0d+GuxiXLJLNABMgp2qUWDPiLvgCzz2dUR+/W/M= github.com/prometheus/client_model v0.2.0/go.mod h1:xMI15A0UPsDsEKsMN9yxemIoYk6Tm2C1GtYGdfGttqA= github.com/prometheus/common v0.0.0-20180110214958-89604d197083/go.mod h1:daVV7qP5qjZbuso7PdcryaAu0sAZbrN9i7WWcTMWvro= github.com/prometheus/common v0.0.0-20181113130724-41aa239b4cce/go.mod h1:daVV7qP5qjZbuso7PdcryaAu0sAZbrN9i7WWcTMWvro= github.com/prometheus/common v0.4.0/go.mod h1:TNfzLD0ON7rHzMJeJkieUDPYmFC7Snx/y86RQel1bk4= github.com/prometheus/common v0.4.1/go.mod h1:TNfzLD0ON7rHzMJeJkieUDPYmFC7Snx/y86RQel1bk4= github.com/prometheus/common v0.6.0/go.mod h1:eBmuwkDJBwy6iBfxCBob6t6dR6ENT/y+J+Zk0j9GMYc= +github.com/prometheus/common v0.10.0 h1:RyRA7RzGXQZiW+tGMr7sxa85G1z0yOpM1qq5c8lNawc= github.com/prometheus/common v0.10.0/go.mod h1:Tlit/dnDKsSWFlCLTWaA1cyBgKHSMdTB80sz/V91rCo= github.com/prometheus/procfs v0.0.0-20180125133057-cb4147076ac7/go.mod h1:c3At6R/oaqEKCNdg8wHV1ftS6bRYblBhIjjI8uT2IGk= github.com/prometheus/procfs v0.0.0-20181005140218-185b4288413d/go.mod h1:c3At6R/oaqEKCNdg8wHV1ftS6bRYblBhIjjI8uT2IGk= @@ -834,7 +837,6 @@ golang.org/x/sys v0.0.0-20201117170446-d9b008d0a637/go.mod h1:h1NjWce9XRLGQEsW7w golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20201201145000-ef89a241ccb3/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20201202213521-69691e467435/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= -golang.org/x/sys v0.0.0-20210119212857-b64e53b001e4/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20210124154548-22da62e12c0c/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20210324051608-47abb6519492 h1:Paq34FxTluEPvVyayQqMPgHm+vTOrIifmcYxFBx9TLg= golang.org/x/sys v0.0.0-20210324051608-47abb6519492/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= diff --git a/vendor/github.com/beorn7/perks/LICENSE b/vendor/github.com/beorn7/perks/LICENSE new file mode 100644 index 00000000..339177be --- /dev/null +++ b/vendor/github.com/beorn7/perks/LICENSE @@ -0,0 +1,20 @@ +Copyright (C) 2013 Blake Mizerany + +Permission is hereby granted, free of charge, to any person obtaining +a copy of this software and associated documentation files (the +"Software"), to deal in the Software without restriction, including +without limitation the rights to use, copy, modify, merge, publish, +distribute, sublicense, and/or sell copies of the Software, and to +permit persons to whom the Software is furnished to do so, subject to +the following conditions: + +The above copyright notice and this permission notice shall be +included in all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE +LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION +OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION +WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. diff --git a/vendor/github.com/beorn7/perks/quantile/exampledata.txt b/vendor/github.com/beorn7/perks/quantile/exampledata.txt new file mode 100644 index 00000000..1602287d --- /dev/null +++ b/vendor/github.com/beorn7/perks/quantile/exampledata.txt @@ -0,0 +1,2388 @@ +8 +5 +26 +12 +5 +235 +13 +6 +28 +30 +3 +3 +3 +3 +5 +2 +33 +7 +2 +4 +7 +12 +14 +5 +8 +3 +10 +4 +5 +3 +6 +6 +209 +20 +3 +10 +14 +3 +4 +6 +8 +5 +11 +7 +3 +2 +3 +3 +212 +5 +222 +4 +10 +10 +5 +6 +3 +8 +3 +10 +254 +220 +2 +3 +5 +24 +5 +4 +222 +7 +3 +3 +223 +8 +15 +12 +14 +14 +3 +2 +2 +3 +13 +3 +11 +4 +4 +6 +5 +7 +13 +5 +3 +5 +2 +5 +3 +5 +2 +7 +15 +17 +14 +3 +6 +6 +3 +17 +5 +4 +7 +6 +4 +4 +8 +6 +8 +3 +9 +3 +6 +3 +4 +5 +3 +3 +660 +4 +6 +10 +3 +6 +3 +2 +5 +13 +2 +4 +4 +10 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+11 +2 +3 +6 +25 +2 +3 +6 +7 +6 +6 +4 +4 +6 +3 +17 +9 +7 +6 +4 +3 +10 +7 +2 +3 +3 +3 +11 +8 +3 +7 +6 +4 +14 +36 +3 +4 +3 +3 +22 +13 +21 +4 +2 +7 +4 +4 +17 +15 +3 +7 +11 +2 +4 +7 +6 +209 +6 +3 +2 +2 +24 +4 +9 +4 +3 +3 +3 +29 +2 +2 +4 +3 +3 +5 +4 +6 +3 +3 +2 +4 diff --git a/vendor/github.com/beorn7/perks/quantile/stream.go b/vendor/github.com/beorn7/perks/quantile/stream.go new file mode 100644 index 00000000..d7d14f8e --- /dev/null +++ b/vendor/github.com/beorn7/perks/quantile/stream.go @@ -0,0 +1,316 @@ +// Package quantile computes approximate quantiles over an unbounded data +// stream within low memory and CPU bounds. +// +// A small amount of accuracy is traded to achieve the above properties. +// +// Multiple streams can be merged before calling Query to generate a single set +// of results. This is meaningful when the streams represent the same type of +// data. See Merge and Samples. +// +// For more detailed information about the algorithm used, see: +// +// Effective Computation of Biased Quantiles over Data Streams +// +// http://www.cs.rutgers.edu/~muthu/bquant.pdf +package quantile + +import ( + "math" + "sort" +) + +// Sample holds an observed value and meta information for compression. JSON +// tags have been added for convenience. +type Sample struct { + Value float64 `json:",string"` + Width float64 `json:",string"` + Delta float64 `json:",string"` +} + +// Samples represents a slice of samples. It implements sort.Interface. +type Samples []Sample + +func (a Samples) Len() int { return len(a) } +func (a Samples) Less(i, j int) bool { return a[i].Value < a[j].Value } +func (a Samples) Swap(i, j int) { a[i], a[j] = a[j], a[i] } + +type invariant func(s *stream, r float64) float64 + +// NewLowBiased returns an initialized Stream for low-biased quantiles +// (e.g. 0.01, 0.1, 0.5) where the needed quantiles are not known a priori, but +// error guarantees can still be given even for the lower ranks of the data +// distribution. +// +// The provided epsilon is a relative error, i.e. the true quantile of a value +// returned by a query is guaranteed to be within (1±Epsilon)*Quantile. +// +// See http://www.cs.rutgers.edu/~muthu/bquant.pdf for time, space, and error +// properties. +func NewLowBiased(epsilon float64) *Stream { + ƒ := func(s *stream, r float64) float64 { + return 2 * epsilon * r + } + return newStream(ƒ) +} + +// NewHighBiased returns an initialized Stream for high-biased quantiles +// (e.g. 0.01, 0.1, 0.5) where the needed quantiles are not known a priori, but +// error guarantees can still be given even for the higher ranks of the data +// distribution. +// +// The provided epsilon is a relative error, i.e. the true quantile of a value +// returned by a query is guaranteed to be within 1-(1±Epsilon)*(1-Quantile). +// +// See http://www.cs.rutgers.edu/~muthu/bquant.pdf for time, space, and error +// properties. +func NewHighBiased(epsilon float64) *Stream { + ƒ := func(s *stream, r float64) float64 { + return 2 * epsilon * (s.n - r) + } + return newStream(ƒ) +} + +// NewTargeted returns an initialized Stream concerned with a particular set of +// quantile values that are supplied a priori. Knowing these a priori reduces +// space and computation time. The targets map maps the desired quantiles to +// their absolute errors, i.e. the true quantile of a value returned by a query +// is guaranteed to be within (Quantile±Epsilon). +// +// See http://www.cs.rutgers.edu/~muthu/bquant.pdf for time, space, and error properties. +func NewTargeted(targetMap map[float64]float64) *Stream { + // Convert map to slice to avoid slow iterations on a map. + // ƒ is called on the hot path, so converting the map to a slice + // beforehand results in significant CPU savings. + targets := targetMapToSlice(targetMap) + + ƒ := func(s *stream, r float64) float64 { + var m = math.MaxFloat64 + var f float64 + for _, t := range targets { + if t.quantile*s.n <= r { + f = (2 * t.epsilon * r) / t.quantile + } else { + f = (2 * t.epsilon * (s.n - r)) / (1 - t.quantile) + } + if f < m { + m = f + } + } + return m + } + return newStream(ƒ) +} + +type target struct { + quantile float64 + epsilon float64 +} + +func targetMapToSlice(targetMap map[float64]float64) []target { + targets := make([]target, 0, len(targetMap)) + + for quantile, epsilon := range targetMap { + t := target{ + quantile: quantile, + epsilon: epsilon, + } + targets = append(targets, t) + } + + return targets +} + +// Stream computes quantiles for a stream of float64s. It is not thread-safe by +// design. Take care when using across multiple goroutines. +type Stream struct { + *stream + b Samples + sorted bool +} + +func newStream(ƒ invariant) *Stream { + x := &stream{ƒ: ƒ} + return &Stream{x, make(Samples, 0, 500), true} +} + +// Insert inserts v into the stream. +func (s *Stream) Insert(v float64) { + s.insert(Sample{Value: v, Width: 1}) +} + +func (s *Stream) insert(sample Sample) { + s.b = append(s.b, sample) + s.sorted = false + if len(s.b) == cap(s.b) { + s.flush() + } +} + +// Query returns the computed qth percentiles value. If s was created with +// NewTargeted, and q is not in the set of quantiles provided a priori, Query +// will return an unspecified result. +func (s *Stream) Query(q float64) float64 { + if !s.flushed() { + // Fast path when there hasn't been enough data for a flush; + // this also yields better accuracy for small sets of data. + l := len(s.b) + if l == 0 { + return 0 + } + i := int(math.Ceil(float64(l) * q)) + if i > 0 { + i -= 1 + } + s.maybeSort() + return s.b[i].Value + } + s.flush() + return s.stream.query(q) +} + +// Merge merges samples into the underlying streams samples. This is handy when +// merging multiple streams from separate threads, database shards, etc. +// +// ATTENTION: This method is broken and does not yield correct results. The +// underlying algorithm is not capable of merging streams correctly. +func (s *Stream) Merge(samples Samples) { + sort.Sort(samples) + s.stream.merge(samples) +} + +// Reset reinitializes and clears the list reusing the samples buffer memory. +func (s *Stream) Reset() { + s.stream.reset() + s.b = s.b[:0] +} + +// Samples returns stream samples held by s. +func (s *Stream) Samples() Samples { + if !s.flushed() { + return s.b + } + s.flush() + return s.stream.samples() +} + +// Count returns the total number of samples observed in the stream +// since initialization. +func (s *Stream) Count() int { + return len(s.b) + s.stream.count() +} + +func (s *Stream) flush() { + s.maybeSort() + s.stream.merge(s.b) + s.b = s.b[:0] +} + +func (s *Stream) maybeSort() { + if !s.sorted { + s.sorted = true + sort.Sort(s.b) + } +} + +func (s *Stream) flushed() bool { + return len(s.stream.l) > 0 +} + +type stream struct { + n float64 + l []Sample + ƒ invariant +} + +func (s *stream) reset() { + s.l = s.l[:0] + s.n = 0 +} + +func (s *stream) insert(v float64) { + s.merge(Samples{{v, 1, 0}}) +} + +func (s *stream) merge(samples Samples) { + // TODO(beorn7): This tries to merge not only individual samples, but + // whole summaries. The paper doesn't mention merging summaries at + // all. Unittests show that the merging is inaccurate. Find out how to + // do merges properly. + var r float64 + i := 0 + for _, sample := range samples { + for ; i < len(s.l); i++ { + c := s.l[i] + if c.Value > sample.Value { + // Insert at position i. + s.l = append(s.l, Sample{}) + copy(s.l[i+1:], s.l[i:]) + s.l[i] = Sample{ + sample.Value, + sample.Width, + math.Max(sample.Delta, math.Floor(s.ƒ(s, r))-1), + // TODO(beorn7): How to calculate delta correctly? + } + i++ + goto inserted + } + r += c.Width + } + s.l = append(s.l, Sample{sample.Value, sample.Width, 0}) + i++ + inserted: + s.n += sample.Width + r += sample.Width + } + s.compress() +} + +func (s *stream) count() int { + return int(s.n) +} + +func (s *stream) query(q float64) float64 { + t := math.Ceil(q * s.n) + t += math.Ceil(s.ƒ(s, t) / 2) + p := s.l[0] + var r float64 + for _, c := range s.l[1:] { + r += p.Width + if r+c.Width+c.Delta > t { + return p.Value + } + p = c + } + return p.Value +} + +func (s *stream) compress() { + if len(s.l) < 2 { + return + } + x := s.l[len(s.l)-1] + xi := len(s.l) - 1 + r := s.n - 1 - x.Width + + for i := len(s.l) - 2; i >= 0; i-- { + c := s.l[i] + if c.Width+x.Width+x.Delta <= s.ƒ(s, r) { + x.Width += c.Width + s.l[xi] = x + // Remove element at i. + copy(s.l[i:], s.l[i+1:]) + s.l = s.l[:len(s.l)-1] + xi -= 1 + } else { + x = c + xi = i + } + r -= c.Width + } +} + +func (s *stream) samples() Samples { + samples := make(Samples, len(s.l)) + copy(samples, s.l) + return samples +} diff --git a/vendor/github.com/cespare/xxhash/v2/.travis.yml b/vendor/github.com/cespare/xxhash/v2/.travis.yml new file mode 100644 index 00000000..c516ea88 --- /dev/null +++ b/vendor/github.com/cespare/xxhash/v2/.travis.yml @@ -0,0 +1,8 @@ +language: go +go: + - "1.x" + - master +env: + - TAGS="" + - TAGS="-tags purego" +script: go test $TAGS -v ./... diff --git a/vendor/github.com/cespare/xxhash/v2/LICENSE.txt b/vendor/github.com/cespare/xxhash/v2/LICENSE.txt new file mode 100644 index 00000000..24b53065 --- /dev/null +++ b/vendor/github.com/cespare/xxhash/v2/LICENSE.txt @@ -0,0 +1,22 @@ +Copyright (c) 2016 Caleb Spare + +MIT License + +Permission is hereby granted, free of charge, to any person obtaining +a copy of this software and associated documentation files (the +"Software"), to deal in the Software without restriction, including +without limitation the rights to use, copy, modify, merge, publish, +distribute, sublicense, and/or sell copies of the Software, and to +permit persons to whom the Software is furnished to do so, subject to +the following conditions: + +The above copyright notice and this permission notice shall be +included in all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE +LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION +OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION +WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. diff --git a/vendor/github.com/cespare/xxhash/v2/README.md b/vendor/github.com/cespare/xxhash/v2/README.md new file mode 100644 index 00000000..2fd8693c --- /dev/null +++ b/vendor/github.com/cespare/xxhash/v2/README.md @@ -0,0 +1,67 @@ +# xxhash + +[![GoDoc](https://godoc.org/github.com/cespare/xxhash?status.svg)](https://godoc.org/github.com/cespare/xxhash) +[![Build Status](https://travis-ci.org/cespare/xxhash.svg?branch=master)](https://travis-ci.org/cespare/xxhash) + +xxhash is a Go implementation of the 64-bit +[xxHash](http://cyan4973.github.io/xxHash/) algorithm, XXH64. This is a +high-quality hashing algorithm that is much faster than anything in the Go +standard library. + +This package provides a straightforward API: + +``` +func Sum64(b []byte) uint64 +func Sum64String(s string) uint64 +type Digest struct{ ... } + func New() *Digest +``` + +The `Digest` type implements hash.Hash64. Its key methods are: + +``` +func (*Digest) Write([]byte) (int, error) +func (*Digest) WriteString(string) (int, error) +func (*Digest) Sum64() uint64 +``` + +This implementation provides a fast pure-Go implementation and an even faster +assembly implementation for amd64. + +## Compatibility + +This package is in a module and the latest code is in version 2 of the module. +You need a version of Go with at least "minimal module compatibility" to use +github.com/cespare/xxhash/v2: + +* 1.9.7+ for Go 1.9 +* 1.10.3+ for Go 1.10 +* Go 1.11 or later + +I recommend using the latest release of Go. + +## Benchmarks + +Here are some quick benchmarks comparing the pure-Go and assembly +implementations of Sum64. + +| input size | purego | asm | +| --- | --- | --- | +| 5 B | 979.66 MB/s | 1291.17 MB/s | +| 100 B | 7475.26 MB/s | 7973.40 MB/s | +| 4 KB | 17573.46 MB/s | 17602.65 MB/s | +| 10 MB | 17131.46 MB/s | 17142.16 MB/s | + +These numbers were generated on Ubuntu 18.04 with an Intel i7-8700K CPU using +the following commands under Go 1.11.2: + +``` +$ go test -tags purego -benchtime 10s -bench '/xxhash,direct,bytes' +$ go test -benchtime 10s -bench '/xxhash,direct,bytes' +``` + +## Projects using this package + +- [InfluxDB](https://github.com/influxdata/influxdb) +- [Prometheus](https://github.com/prometheus/prometheus) +- [FreeCache](https://github.com/coocood/freecache) diff --git a/vendor/github.com/cespare/xxhash/v2/go.mod b/vendor/github.com/cespare/xxhash/v2/go.mod new file mode 100644 index 00000000..49f67608 --- /dev/null +++ b/vendor/github.com/cespare/xxhash/v2/go.mod @@ -0,0 +1,3 @@ +module github.com/cespare/xxhash/v2 + +go 1.11 diff --git a/vendor/github.com/cespare/xxhash/v2/go.sum b/vendor/github.com/cespare/xxhash/v2/go.sum new file mode 100644 index 00000000..e69de29b diff --git a/vendor/github.com/cespare/xxhash/v2/xxhash.go b/vendor/github.com/cespare/xxhash/v2/xxhash.go new file mode 100644 index 00000000..db0b35fb --- /dev/null +++ b/vendor/github.com/cespare/xxhash/v2/xxhash.go @@ -0,0 +1,236 @@ +// Package xxhash implements the 64-bit variant of xxHash (XXH64) as described +// at http://cyan4973.github.io/xxHash/. +package xxhash + +import ( + "encoding/binary" + "errors" + "math/bits" +) + +const ( + prime1 uint64 = 11400714785074694791 + prime2 uint64 = 14029467366897019727 + prime3 uint64 = 1609587929392839161 + prime4 uint64 = 9650029242287828579 + prime5 uint64 = 2870177450012600261 +) + +// NOTE(caleb): I'm using both consts and vars of the primes. Using consts where +// possible in the Go code is worth a small (but measurable) performance boost +// by avoiding some MOVQs. Vars are needed for the asm and also are useful for +// convenience in the Go code in a few places where we need to intentionally +// avoid constant arithmetic (e.g., v1 := prime1 + prime2 fails because the +// result overflows a uint64). +var ( + prime1v = prime1 + prime2v = prime2 + prime3v = prime3 + prime4v = prime4 + prime5v = prime5 +) + +// Digest implements hash.Hash64. +type Digest struct { + v1 uint64 + v2 uint64 + v3 uint64 + v4 uint64 + total uint64 + mem [32]byte + n int // how much of mem is used +} + +// New creates a new Digest that computes the 64-bit xxHash algorithm. +func New() *Digest { + var d Digest + d.Reset() + return &d +} + +// Reset clears the Digest's state so that it can be reused. +func (d *Digest) Reset() { + d.v1 = prime1v + prime2 + d.v2 = prime2 + d.v3 = 0 + d.v4 = -prime1v + d.total = 0 + d.n = 0 +} + +// Size always returns 8 bytes. +func (d *Digest) Size() int { return 8 } + +// BlockSize always returns 32 bytes. +func (d *Digest) BlockSize() int { return 32 } + +// Write adds more data to d. It always returns len(b), nil. +func (d *Digest) Write(b []byte) (n int, err error) { + n = len(b) + d.total += uint64(n) + + if d.n+n < 32 { + // This new data doesn't even fill the current block. + copy(d.mem[d.n:], b) + d.n += n + return + } + + if d.n > 0 { + // Finish off the partial block. + copy(d.mem[d.n:], b) + d.v1 = round(d.v1, u64(d.mem[0:8])) + d.v2 = round(d.v2, u64(d.mem[8:16])) + d.v3 = round(d.v3, u64(d.mem[16:24])) + d.v4 = round(d.v4, u64(d.mem[24:32])) + b = b[32-d.n:] + d.n = 0 + } + + if len(b) >= 32 { + // One or more full blocks left. + nw := writeBlocks(d, b) + b = b[nw:] + } + + // Store any remaining partial block. + copy(d.mem[:], b) + d.n = len(b) + + return +} + +// Sum appends the current hash to b and returns the resulting slice. +func (d *Digest) Sum(b []byte) []byte { + s := d.Sum64() + return append( + b, + byte(s>>56), + byte(s>>48), + byte(s>>40), + byte(s>>32), + byte(s>>24), + byte(s>>16), + byte(s>>8), + byte(s), + ) +} + +// Sum64 returns the current hash. +func (d *Digest) Sum64() uint64 { + var h uint64 + + if d.total >= 32 { + v1, v2, v3, v4 := d.v1, d.v2, d.v3, d.v4 + h = rol1(v1) + rol7(v2) + rol12(v3) + rol18(v4) + h = mergeRound(h, v1) + h = mergeRound(h, v2) + h = mergeRound(h, v3) + h = mergeRound(h, v4) + } else { + h = d.v3 + prime5 + } + + h += d.total + + i, end := 0, d.n + for ; i+8 <= end; i += 8 { + k1 := round(0, u64(d.mem[i:i+8])) + h ^= k1 + h = rol27(h)*prime1 + prime4 + } + if i+4 <= end { + h ^= uint64(u32(d.mem[i:i+4])) * prime1 + h = rol23(h)*prime2 + prime3 + i += 4 + } + for i < end { + h ^= uint64(d.mem[i]) * prime5 + h = rol11(h) * prime1 + i++ + } + + h ^= h >> 33 + h *= prime2 + h ^= h >> 29 + h *= prime3 + h ^= h >> 32 + + return h +} + +const ( + magic = "xxh\x06" + marshaledSize = len(magic) + 8*5 + 32 +) + +// MarshalBinary implements the encoding.BinaryMarshaler interface. +func (d *Digest) MarshalBinary() ([]byte, error) { + b := make([]byte, 0, marshaledSize) + b = append(b, magic...) + b = appendUint64(b, d.v1) + b = appendUint64(b, d.v2) + b = appendUint64(b, d.v3) + b = appendUint64(b, d.v4) + b = appendUint64(b, d.total) + b = append(b, d.mem[:d.n]...) + b = b[:len(b)+len(d.mem)-d.n] + return b, nil +} + +// UnmarshalBinary implements the encoding.BinaryUnmarshaler interface. +func (d *Digest) UnmarshalBinary(b []byte) error { + if len(b) < len(magic) || string(b[:len(magic)]) != magic { + return errors.New("xxhash: invalid hash state identifier") + } + if len(b) != marshaledSize { + return errors.New("xxhash: invalid hash state size") + } + b = b[len(magic):] + b, d.v1 = consumeUint64(b) + b, d.v2 = consumeUint64(b) + b, d.v3 = consumeUint64(b) + b, d.v4 = consumeUint64(b) + b, d.total = consumeUint64(b) + copy(d.mem[:], b) + b = b[len(d.mem):] + d.n = int(d.total % uint64(len(d.mem))) + return nil +} + +func appendUint64(b []byte, x uint64) []byte { + var a [8]byte + binary.LittleEndian.PutUint64(a[:], x) + return append(b, a[:]...) +} + +func consumeUint64(b []byte) ([]byte, uint64) { + x := u64(b) + return b[8:], x +} + +func u64(b []byte) uint64 { return binary.LittleEndian.Uint64(b) } +func u32(b []byte) uint32 { return binary.LittleEndian.Uint32(b) } + +func round(acc, input uint64) uint64 { + acc += input * prime2 + acc = rol31(acc) + acc *= prime1 + return acc +} + +func mergeRound(acc, val uint64) uint64 { + val = round(0, val) + acc ^= val + acc = acc*prime1 + prime4 + return acc +} + +func rol1(x uint64) uint64 { return bits.RotateLeft64(x, 1) } +func rol7(x uint64) uint64 { return bits.RotateLeft64(x, 7) } +func rol11(x uint64) uint64 { return bits.RotateLeft64(x, 11) } +func rol12(x uint64) uint64 { return bits.RotateLeft64(x, 12) } +func rol18(x uint64) uint64 { return bits.RotateLeft64(x, 18) } +func rol23(x uint64) uint64 { return bits.RotateLeft64(x, 23) } +func rol27(x uint64) uint64 { return bits.RotateLeft64(x, 27) } +func rol31(x uint64) uint64 { return bits.RotateLeft64(x, 31) } diff --git a/vendor/github.com/cespare/xxhash/v2/xxhash_amd64.go b/vendor/github.com/cespare/xxhash/v2/xxhash_amd64.go new file mode 100644 index 00000000..ad14b807 --- /dev/null +++ b/vendor/github.com/cespare/xxhash/v2/xxhash_amd64.go @@ -0,0 +1,13 @@ +// +build !appengine +// +build gc +// +build !purego + +package xxhash + +// Sum64 computes the 64-bit xxHash digest of b. +// +//go:noescape +func Sum64(b []byte) uint64 + +//go:noescape +func writeBlocks(d *Digest, b []byte) int diff --git a/vendor/github.com/cespare/xxhash/v2/xxhash_amd64.s b/vendor/github.com/cespare/xxhash/v2/xxhash_amd64.s new file mode 100644 index 00000000..d580e32a --- /dev/null +++ b/vendor/github.com/cespare/xxhash/v2/xxhash_amd64.s @@ -0,0 +1,215 @@ +// +build !appengine +// +build gc +// +build !purego + +#include "textflag.h" + +// Register allocation: +// AX h +// CX pointer to advance through b +// DX n +// BX loop end +// R8 v1, k1 +// R9 v2 +// R10 v3 +// R11 v4 +// R12 tmp +// R13 prime1v +// R14 prime2v +// R15 prime4v + +// round reads from and advances the buffer pointer in CX. +// It assumes that R13 has prime1v and R14 has prime2v. +#define round(r) \ + MOVQ (CX), R12 \ + ADDQ $8, CX \ + IMULQ R14, R12 \ + ADDQ R12, r \ + ROLQ $31, r \ + IMULQ R13, r + +// mergeRound applies a merge round on the two registers acc and val. +// It assumes that R13 has prime1v, R14 has prime2v, and R15 has prime4v. +#define mergeRound(acc, val) \ + IMULQ R14, val \ + ROLQ $31, val \ + IMULQ R13, val \ + XORQ val, acc \ + IMULQ R13, acc \ + ADDQ R15, acc + +// func Sum64(b []byte) uint64 +TEXT ·Sum64(SB), NOSPLIT, $0-32 + // Load fixed primes. + MOVQ ·prime1v(SB), R13 + MOVQ ·prime2v(SB), R14 + MOVQ ·prime4v(SB), R15 + + // Load slice. + MOVQ b_base+0(FP), CX + MOVQ b_len+8(FP), DX + LEAQ (CX)(DX*1), BX + + // The first loop limit will be len(b)-32. + SUBQ $32, BX + + // Check whether we have at least one block. + CMPQ DX, $32 + JLT noBlocks + + // Set up initial state (v1, v2, v3, v4). + MOVQ R13, R8 + ADDQ R14, R8 + MOVQ R14, R9 + XORQ R10, R10 + XORQ R11, R11 + SUBQ R13, R11 + + // Loop until CX > BX. +blockLoop: + round(R8) + round(R9) + round(R10) + round(R11) + + CMPQ CX, BX + JLE blockLoop + + MOVQ R8, AX + ROLQ $1, AX + MOVQ R9, R12 + ROLQ $7, R12 + ADDQ R12, AX + MOVQ R10, R12 + ROLQ $12, R12 + ADDQ R12, AX + MOVQ R11, R12 + ROLQ $18, R12 + ADDQ R12, AX + + mergeRound(AX, R8) + mergeRound(AX, R9) + mergeRound(AX, R10) + mergeRound(AX, R11) + + JMP afterBlocks + +noBlocks: + MOVQ ·prime5v(SB), AX + +afterBlocks: + ADDQ DX, AX + + // Right now BX has len(b)-32, and we want to loop until CX > len(b)-8. + ADDQ $24, BX + + CMPQ CX, BX + JG fourByte + +wordLoop: + // Calculate k1. + MOVQ (CX), R8 + ADDQ $8, CX + IMULQ R14, R8 + ROLQ $31, R8 + IMULQ R13, R8 + + XORQ R8, AX + ROLQ $27, AX + IMULQ R13, AX + ADDQ R15, AX + + CMPQ CX, BX + JLE wordLoop + +fourByte: + ADDQ $4, BX + CMPQ CX, BX + JG singles + + MOVL (CX), R8 + ADDQ $4, CX + IMULQ R13, R8 + XORQ R8, AX + + ROLQ $23, AX + IMULQ R14, AX + ADDQ ·prime3v(SB), AX + +singles: + ADDQ $4, BX + CMPQ CX, BX + JGE finalize + +singlesLoop: + MOVBQZX (CX), R12 + ADDQ $1, CX + IMULQ ·prime5v(SB), R12 + XORQ R12, AX + + ROLQ $11, AX + IMULQ R13, AX + + CMPQ CX, BX + JL singlesLoop + +finalize: + MOVQ AX, R12 + SHRQ $33, R12 + XORQ R12, AX + IMULQ R14, AX + MOVQ AX, R12 + SHRQ $29, R12 + XORQ R12, AX + IMULQ ·prime3v(SB), AX + MOVQ AX, R12 + SHRQ $32, R12 + XORQ R12, AX + + MOVQ AX, ret+24(FP) + RET + +// writeBlocks uses the same registers as above except that it uses AX to store +// the d pointer. + +// func writeBlocks(d *Digest, b []byte) int +TEXT ·writeBlocks(SB), NOSPLIT, $0-40 + // Load fixed primes needed for round. + MOVQ ·prime1v(SB), R13 + MOVQ ·prime2v(SB), R14 + + // Load slice. + MOVQ b_base+8(FP), CX + MOVQ b_len+16(FP), DX + LEAQ (CX)(DX*1), BX + SUBQ $32, BX + + // Load vN from d. + MOVQ d+0(FP), AX + MOVQ 0(AX), R8 // v1 + MOVQ 8(AX), R9 // v2 + MOVQ 16(AX), R10 // v3 + MOVQ 24(AX), R11 // v4 + + // We don't need to check the loop condition here; this function is + // always called with at least one block of data to process. +blockLoop: + round(R8) + round(R9) + round(R10) + round(R11) + + CMPQ CX, BX + JLE blockLoop + + // Copy vN back to d. + MOVQ R8, 0(AX) + MOVQ R9, 8(AX) + MOVQ R10, 16(AX) + MOVQ R11, 24(AX) + + // The number of bytes written is CX minus the old base pointer. + SUBQ b_base+8(FP), CX + MOVQ CX, ret+32(FP) + + RET diff --git a/vendor/github.com/cespare/xxhash/v2/xxhash_other.go b/vendor/github.com/cespare/xxhash/v2/xxhash_other.go new file mode 100644 index 00000000..4a5a8216 --- /dev/null +++ b/vendor/github.com/cespare/xxhash/v2/xxhash_other.go @@ -0,0 +1,76 @@ +// +build !amd64 appengine !gc purego + +package xxhash + +// Sum64 computes the 64-bit xxHash digest of b. +func Sum64(b []byte) uint64 { + // A simpler version would be + // d := New() + // d.Write(b) + // return d.Sum64() + // but this is faster, particularly for small inputs. + + n := len(b) + var h uint64 + + if n >= 32 { + v1 := prime1v + prime2 + v2 := prime2 + v3 := uint64(0) + v4 := -prime1v + for len(b) >= 32 { + v1 = round(v1, u64(b[0:8:len(b)])) + v2 = round(v2, u64(b[8:16:len(b)])) + v3 = round(v3, u64(b[16:24:len(b)])) + v4 = round(v4, u64(b[24:32:len(b)])) + b = b[32:len(b):len(b)] + } + h = rol1(v1) + rol7(v2) + rol12(v3) + rol18(v4) + h = mergeRound(h, v1) + h = mergeRound(h, v2) + h = mergeRound(h, v3) + h = mergeRound(h, v4) + } else { + h = prime5 + } + + h += uint64(n) + + i, end := 0, len(b) + for ; i+8 <= end; i += 8 { + k1 := round(0, u64(b[i:i+8:len(b)])) + h ^= k1 + h = rol27(h)*prime1 + prime4 + } + if i+4 <= end { + h ^= uint64(u32(b[i:i+4:len(b)])) * prime1 + h = rol23(h)*prime2 + prime3 + i += 4 + } + for ; i < end; i++ { + h ^= uint64(b[i]) * prime5 + h = rol11(h) * prime1 + } + + h ^= h >> 33 + h *= prime2 + h ^= h >> 29 + h *= prime3 + h ^= h >> 32 + + return h +} + +func writeBlocks(d *Digest, b []byte) int { + v1, v2, v3, v4 := d.v1, d.v2, d.v3, d.v4 + n := len(b) + for len(b) >= 32 { + v1 = round(v1, u64(b[0:8:len(b)])) + v2 = round(v2, u64(b[8:16:len(b)])) + v3 = round(v3, u64(b[16:24:len(b)])) + v4 = round(v4, u64(b[24:32:len(b)])) + b = b[32:len(b):len(b)] + } + d.v1, d.v2, d.v3, d.v4 = v1, v2, v3, v4 + return n - len(b) +} diff --git a/vendor/github.com/cespare/xxhash/v2/xxhash_safe.go b/vendor/github.com/cespare/xxhash/v2/xxhash_safe.go new file mode 100644 index 00000000..fc9bea7a --- /dev/null +++ b/vendor/github.com/cespare/xxhash/v2/xxhash_safe.go @@ -0,0 +1,15 @@ +// +build appengine + +// This file contains the safe implementations of otherwise unsafe-using code. + +package xxhash + +// Sum64String computes the 64-bit xxHash digest of s. +func Sum64String(s string) uint64 { + return Sum64([]byte(s)) +} + +// WriteString adds more data to d. It always returns len(s), nil. +func (d *Digest) WriteString(s string) (n int, err error) { + return d.Write([]byte(s)) +} diff --git a/vendor/github.com/cespare/xxhash/v2/xxhash_unsafe.go b/vendor/github.com/cespare/xxhash/v2/xxhash_unsafe.go new file mode 100644 index 00000000..53bf76ef --- /dev/null +++ b/vendor/github.com/cespare/xxhash/v2/xxhash_unsafe.go @@ -0,0 +1,46 @@ +// +build !appengine + +// This file encapsulates usage of unsafe. +// xxhash_safe.go contains the safe implementations. + +package xxhash + +import ( + "reflect" + "unsafe" +) + +// Notes: +// +// See https://groups.google.com/d/msg/golang-nuts/dcjzJy-bSpw/tcZYBzQqAQAJ +// for some discussion about these unsafe conversions. +// +// In the future it's possible that compiler optimizations will make these +// unsafe operations unnecessary: https://golang.org/issue/2205. +// +// Both of these wrapper functions still incur function call overhead since they +// will not be inlined. We could write Go/asm copies of Sum64 and Digest.Write +// for strings to squeeze out a bit more speed. Mid-stack inlining should +// eventually fix this. + +// Sum64String computes the 64-bit xxHash digest of s. +// It may be faster than Sum64([]byte(s)) by avoiding a copy. +func Sum64String(s string) uint64 { + var b []byte + bh := (*reflect.SliceHeader)(unsafe.Pointer(&b)) + bh.Data = (*reflect.StringHeader)(unsafe.Pointer(&s)).Data + bh.Len = len(s) + bh.Cap = len(s) + return Sum64(b) +} + +// WriteString adds more data to d. It always returns len(s), nil. +// It may be faster than Write([]byte(s)) by avoiding a copy. +func (d *Digest) WriteString(s string) (n int, err error) { + var b []byte + bh := (*reflect.SliceHeader)(unsafe.Pointer(&b)) + bh.Data = (*reflect.StringHeader)(unsafe.Pointer(&s)).Data + bh.Len = len(s) + bh.Cap = len(s) + return d.Write(b) +} diff --git a/vendor/github.com/containerd/stargz-snapshotter/cache/cache.go b/vendor/github.com/containerd/stargz-snapshotter/cache/cache.go index 0b658f3f..b6e000fb 100644 --- a/vendor/github.com/containerd/stargz-snapshotter/cache/cache.go +++ b/vendor/github.com/containerd/stargz-snapshotter/cache/cache.go @@ -24,7 +24,8 @@ import ( "path/filepath" "sync" - "github.com/golang/groupcache/lru" + "github.com/containerd/stargz-snapshotter/util/lrucache" + "github.com/containerd/stargz-snapshotter/util/namedmutex" "github.com/pkg/errors" ) @@ -34,15 +35,37 @@ const ( ) type DirectoryCacheConfig struct { + + // Number of entries of LRU cache (default: 10). + // This won't be used when DataCache is specified. MaxLRUCacheEntry int - MaxCacheFds int - SyncAdd bool + + // Number of file descriptors to cache (default: 10). + // This won't be used when FdCache is specified. + MaxCacheFds int + + // On Add, wait until the data is fully written to the cache directory. + SyncAdd bool + + // DataCache is an on-memory cache of the data. + // OnEvicted will be overridden and replaced for internal use. + DataCache *lrucache.Cache + + // FdCache is a cache for opened file descriptors. + // OnEvicted will be overridden and replaced for internal use. + FdCache *lrucache.Cache + + // BufPool will be used for pooling bytes.Buffer. + BufPool *sync.Pool } // TODO: contents validation. type BlobCache interface { + // Add adds the passed data to the cache Add(key string, p []byte, opts ...Option) + + // FetchAt fetches the specified range of data from the cache FetchAt(key string, offset int64, p []byte, opts ...Option) (n int, err error) } @@ -64,33 +87,48 @@ func Direct() Option { } func NewDirectoryCache(directory string, config DirectoryCacheConfig) (BlobCache, error) { - maxEntry := config.MaxLRUCacheEntry - if maxEntry == 0 { - maxEntry = defaultMaxLRUCacheEntry + if !filepath.IsAbs(directory) { + return nil, fmt.Errorf("dir cache path must be an absolute path; got %q", directory) } - maxFds := config.MaxCacheFds - if maxFds == 0 { - maxFds = defaultMaxCacheFds - } - if err := os.MkdirAll(directory, os.ModePerm); err != nil { - return nil, err - } - dc := &directoryCache{ - cache: newObjectCache(maxEntry), - fileCache: newObjectCache(maxFds), - wipLock: &namedLock{}, - directory: directory, - bufPool: sync.Pool{ + bufPool := config.BufPool + if bufPool == nil { + bufPool = &sync.Pool{ New: func() interface{} { return new(bytes.Buffer) }, - }, + } } - dc.cache.finalize = func(value interface{}) { - dc.bufPool.Put(value) + dataCache := config.DataCache + if dataCache == nil { + maxEntry := config.MaxLRUCacheEntry + if maxEntry == 0 { + maxEntry = defaultMaxLRUCacheEntry + } + dataCache = lrucache.New(maxEntry) + dataCache.OnEvicted = func(key string, value interface{}) { + bufPool.Put(value) + } } - dc.fileCache.finalize = func(value interface{}) { - value.(*os.File).Close() + fdCache := config.FdCache + if fdCache == nil { + maxEntry := config.MaxCacheFds + if maxEntry == 0 { + maxEntry = defaultMaxCacheFds + } + fdCache = lrucache.New(maxEntry) + fdCache.OnEvicted = func(key string, value interface{}) { + value.(*os.File).Close() + } + } + if err := os.MkdirAll(directory, 0700); err != nil { + return nil, err + } + dc := &directoryCache{ + cache: dataCache, + fileCache: fdCache, + wipLock: new(namedmutex.NamedMutex), + directory: directory, + bufPool: bufPool, } dc.syncAdd = config.SyncAdd return dc, nil @@ -98,12 +136,12 @@ func NewDirectoryCache(directory string, config DirectoryCacheConfig) (BlobCache // directoryCache is a cache implementation which backend is a directory. type directoryCache struct { - cache *objectCache - fileCache *objectCache + cache *lrucache.Cache + fileCache *lrucache.Cache directory string - wipLock *namedLock + wipLock *namedmutex.NamedMutex - bufPool sync.Pool + bufPool *sync.Pool syncAdd bool } @@ -116,7 +154,7 @@ func (dc *directoryCache) FetchAt(key string, offset int64, p []byte, opts ...Op if !opt.direct { // Get data from memory - if b, done, ok := dc.cache.get(key); ok { + if b, done, ok := dc.cache.Get(key); ok { defer done() data := b.(*bytes.Buffer).Bytes() if int64(len(data)) < offset { @@ -127,7 +165,7 @@ func (dc *directoryCache) FetchAt(key string, offset int64, p []byte, opts ...Op } // Get data from disk. If the file is already opened, use it. - if f, done, ok := dc.fileCache.get(key); ok { + if f, done, ok := dc.fileCache.Get(key); ok { defer done() return f.(*os.File).ReadAt(p, offset) } @@ -147,8 +185,14 @@ func (dc *directoryCache) FetchAt(key string, offset int64, p []byte, opts ...Op // Cache the opened file for future use. If "direct" option is specified, this // won't be done. This option is useful for preventing file cache from being // polluted by data that won't be accessed immediately. - if opt.direct || !dc.fileCache.add(key, file) { + if opt.direct { file.Close() + } else { + _, done, added := dc.fileCache.Add(key, file) + if !added { + file.Close() // file already exists in the cache. discard it. + } + done() // Release this immediately. This will be removed on eviction in lru cache. } // TODO: should we cache the entire file data on memory? @@ -172,9 +216,11 @@ func (dc *directoryCache) Add(key string, p []byte, opts ...Option) { b := dc.bufPool.Get().(*bytes.Buffer) b.Reset() b.Write(p) - if !dc.cache.add(key, b) { - dc.bufPool.Put(b) // Already exists. No need to cache. + _, done, added := dc.cache.Add(key, b) + if !added { + dc.bufPool.Put(b) // already exists in the cache. discard it. } + done() // This will remain until it's evicted in lru cache. } // Cache the passed data to disk. @@ -189,29 +235,29 @@ func (dc *directoryCache) Add(key string, p []byte, opts ...Option) { wip = dc.wipPath(key) ) - dc.wipLock.lock(key) + dc.wipLock.Lock(key) if _, err := os.Stat(wip); err == nil { - dc.wipLock.unlock(key) + dc.wipLock.Unlock(key) return // Write in progress } if _, err := os.Stat(c); err == nil { - dc.wipLock.unlock(key) + dc.wipLock.Unlock(key) return // Already exists. } // Write the contents to a temporary file if err := os.MkdirAll(filepath.Dir(wip), os.ModePerm); err != nil { fmt.Printf("Warning: Failed to Create blob cache directory %q: %v\n", c, err) - dc.wipLock.unlock(key) + dc.wipLock.Unlock(key) return } wipfile, err := os.Create(wip) if err != nil { fmt.Printf("Warning: failed to prepare temp file for storing cache %q", key) - dc.wipLock.unlock(key) + dc.wipLock.Unlock(key) return } - dc.wipLock.unlock(key) + dc.wipLock.Unlock(key) defer func() { wipfile.Close() @@ -241,8 +287,14 @@ func (dc *directoryCache) Add(key string, p []byte, opts ...Option) { // Cache the opened file for future use. If "direct" option is specified, this // won't be done. This option is useful for preventing file cache from being // polluted by data that won't be accessed immediately. - if opt.direct || !dc.fileCache.add(key, file) { + if opt.direct { file.Close() + } else { + _, done, added := dc.fileCache.Add(key, file) + if !added { + file.Close() // already exists in the cache. discard it. + } + done() // This will remain until it's evicted in lru cache. } } @@ -261,109 +313,6 @@ func (dc *directoryCache) wipPath(key string) string { return filepath.Join(dc.directory, key[:2], "w", key) } -type namedLock struct { - muMap map[string]*sync.Mutex - refMap map[string]int - - mu sync.Mutex -} - -func (nl *namedLock) lock(name string) { - nl.mu.Lock() - if nl.muMap == nil { - nl.muMap = make(map[string]*sync.Mutex) - } - if nl.refMap == nil { - nl.refMap = make(map[string]int) - } - if _, ok := nl.muMap[name]; !ok { - nl.muMap[name] = &sync.Mutex{} - } - mu := nl.muMap[name] - nl.refMap[name]++ - nl.mu.Unlock() - mu.Lock() -} - -func (nl *namedLock) unlock(name string) { - nl.mu.Lock() - mu := nl.muMap[name] - nl.refMap[name]-- - if nl.refMap[name] <= 0 { - delete(nl.muMap, name) - delete(nl.refMap, name) - } - nl.mu.Unlock() - mu.Unlock() -} - -func newObjectCache(maxEntries int) *objectCache { - oc := &objectCache{ - cache: lru.New(maxEntries), - } - oc.cache.OnEvicted = func(key lru.Key, value interface{}) { - value.(*object).release() // Decrease ref count incremented in add operation. - } - return oc -} - -type objectCache struct { - cache *lru.Cache - cacheMu sync.Mutex - finalize func(interface{}) -} - -func (oc *objectCache) get(key string) (value interface{}, done func(), ok bool) { - oc.cacheMu.Lock() - defer oc.cacheMu.Unlock() - o, ok := oc.cache.Get(key) - if !ok { - return nil, nil, false - } - o.(*object).use() - return o.(*object).v, func() { o.(*object).release() }, true -} - -func (oc *objectCache) add(key string, value interface{}) bool { - oc.cacheMu.Lock() - defer oc.cacheMu.Unlock() - if _, ok := oc.cache.Get(key); ok { - return false // TODO: should we swap the object? - } - o := &object{ - v: value, - finalize: oc.finalize, - } - o.use() // Keep this object having at least 1 ref count (will be decreased on eviction) - oc.cache.Add(key, o) - return true -} - -type object struct { - v interface{} - - refCounts int64 - finalize func(interface{}) - - mu sync.Mutex -} - -func (o *object) use() { - o.mu.Lock() - defer o.mu.Unlock() - o.refCounts++ -} - -func (o *object) release() { - o.mu.Lock() - defer o.mu.Unlock() - o.refCounts-- - if o.refCounts <= 0 && o.finalize != nil { - // nobody will refer this object - o.finalize(o.v) - } -} - func NewMemoryCache() BlobCache { return &memoryCache{ membuf: map[string]string{}, diff --git a/vendor/github.com/containerd/stargz-snapshotter/estargz/types.go b/vendor/github.com/containerd/stargz-snapshotter/estargz/types.go index 7b05ab53..b0fb92db 100644 --- a/vendor/github.com/containerd/stargz-snapshotter/estargz/types.go +++ b/vendor/github.com/containerd/stargz-snapshotter/estargz/types.go @@ -23,6 +23,7 @@ package estargz import ( + "archive/tar" "os" "path" "time" @@ -229,7 +230,9 @@ func (fi fileInfo) Size() int64 { return fi.e.Size } func (fi fileInfo) ModTime() time.Time { return fi.e.ModTime() } func (fi fileInfo) Sys() interface{} { return fi.e } func (fi fileInfo) Mode() (m os.FileMode) { - m = os.FileMode(fi.e.Mode) & os.ModePerm + // TOCEntry.Mode is tar.Header.Mode so we can understand the these bits using `tar` pkg. + m = (&tar.Header{Mode: fi.e.Mode}).FileInfo().Mode() & + (os.ModePerm | os.ModeSetuid | os.ModeSetgid | os.ModeSticky) switch fi.e.Type { case "dir": m |= os.ModeDir @@ -242,7 +245,6 @@ func (fi fileInfo) Mode() (m os.FileMode) { case "fifo": m |= os.ModeNamedPipe } - // TODO: ModeSetuid, ModeSetgid, if/as needed. return m } diff --git a/vendor/github.com/containerd/stargz-snapshotter/fs/config/config.go b/vendor/github.com/containerd/stargz-snapshotter/fs/config/config.go index a0ec0e38..7cdfb427 100644 --- a/vendor/github.com/containerd/stargz-snapshotter/fs/config/config.go +++ b/vendor/github.com/containerd/stargz-snapshotter/fs/config/config.go @@ -45,6 +45,7 @@ type Config struct { AllowNoVerification bool `toml:"allow_no_verification"` DisableVerification bool `toml:"disable_verification"` MaxConcurrency int64 `toml:"max_concurrency"` + NoPrometheus bool `toml:"no_prometheus"` // BlobConfig is config for layer blob management. BlobConfig `toml:"blob"` diff --git a/vendor/github.com/containerd/stargz-snapshotter/fs/fs.go b/vendor/github.com/containerd/stargz-snapshotter/fs/fs.go index dc789006..681faa47 100644 --- a/vendor/github.com/containerd/stargz-snapshotter/fs/fs.go +++ b/vendor/github.com/containerd/stargz-snapshotter/fs/fs.go @@ -37,14 +37,12 @@ package fs import ( - "archive/tar" "bytes" "context" "encoding/json" "fmt" "io" "os" - "path/filepath" "sort" "strconv" "strings" @@ -54,39 +52,34 @@ import ( "unsafe" "github.com/containerd/containerd/log" - "github.com/containerd/containerd/reference" "github.com/containerd/containerd/remotes/docker" - "github.com/containerd/stargz-snapshotter/cache" "github.com/containerd/stargz-snapshotter/estargz" "github.com/containerd/stargz-snapshotter/fs/config" - "github.com/containerd/stargz-snapshotter/fs/reader" - "github.com/containerd/stargz-snapshotter/fs/remote" + "github.com/containerd/stargz-snapshotter/fs/layer" + fsmetrics "github.com/containerd/stargz-snapshotter/fs/metrics" "github.com/containerd/stargz-snapshotter/fs/source" snbase "github.com/containerd/stargz-snapshotter/snapshot" "github.com/containerd/stargz-snapshotter/task" - "github.com/golang/groupcache/lru" + metrics "github.com/docker/go-metrics" fusefs "github.com/hanwen/go-fuse/v2/fs" "github.com/hanwen/go-fuse/v2/fuse" digest "github.com/opencontainers/go-digest" ocispec "github.com/opencontainers/image-spec/specs-go/v1" "github.com/pkg/errors" - "golang.org/x/sync/singleflight" "golang.org/x/sys/unix" ) +var opaqueXattrs = []string{"trusted.overlay.opaque", "user.overlay.opaque"} + const ( - blockSize = 4096 - memoryCacheType = "memory" - whiteoutPrefix = ".wh." - whiteoutOpaqueDir = whiteoutPrefix + whiteoutPrefix + ".opq" - opaqueXattr = "trusted.overlay.opaque" - opaqueXattrValue = "y" - stateDirName = ".stargz-snapshotter" - defaultResolveResultEntry = 100 - defaultPrefetchTimeoutSec = 10 - defaultMaxConcurrency = 2 - statFileMode = syscall.S_IFREG | 0400 // -r-------- - stateDirMode = syscall.S_IFDIR | 0500 // dr-x------ + blockSize = 4096 + whiteoutPrefix = ".wh." + whiteoutOpaqueDir = whiteoutPrefix + whiteoutPrefix + ".opq" + opaqueXattrValue = "y" + stateDirName = ".stargz-snapshotter" + defaultMaxConcurrency = 2 + statFileMode = syscall.S_IFREG | 0400 // -r-------- + stateDirMode = syscall.S_IFDIR | 0500 // dr-x------ ) type Option func(*options) @@ -106,46 +99,6 @@ func NewFilesystem(root string, cfg config.Config, opts ...Option) (_ snbase.Fil for _, o := range opts { o(&fsOpts) } - - dcc := cfg.DirectoryCacheConfig - var httpCache cache.BlobCache - if cfg.HTTPCacheType == memoryCacheType { - httpCache = cache.NewMemoryCache() - } else { - if httpCache, err = cache.NewDirectoryCache( - filepath.Join(root, "http"), - cache.DirectoryCacheConfig{ - MaxLRUCacheEntry: dcc.MaxLRUCacheEntry, - MaxCacheFds: dcc.MaxCacheFds, - SyncAdd: dcc.SyncAdd, - }, - ); err != nil { - return nil, errors.Wrap(err, "failed to prepare HTTP cache") - } - } - var fsCache cache.BlobCache - if cfg.FSCacheType == memoryCacheType { - fsCache = cache.NewMemoryCache() - } else { - if fsCache, err = cache.NewDirectoryCache( - filepath.Join(root, "fscache"), - cache.DirectoryCacheConfig{ - MaxLRUCacheEntry: dcc.MaxLRUCacheEntry, - MaxCacheFds: dcc.MaxCacheFds, - SyncAdd: dcc.SyncAdd, - }, - ); err != nil { - return nil, errors.Wrap(err, "failed to prepare filesystem cache") - } - } - resolveResultEntry := cfg.ResolveResultEntry - if resolveResultEntry == 0 { - resolveResultEntry = defaultResolveResultEntry - } - prefetchTimeout := time.Duration(cfg.PrefetchTimeoutSec) * time.Second - if prefetchTimeout == 0 { - prefetchTimeout = defaultPrefetchTimeoutSec * time.Second - } maxConcurrency := cfg.MaxConcurrency if maxConcurrency == 0 { maxConcurrency = defaultMaxConcurrency @@ -155,46 +108,52 @@ func NewFilesystem(root string, cfg config.Config, opts ...Option) (_ snbase.Fil getSources = source.FromDefaultLabels( docker.ConfigureDefaultRegistries(docker.WithPlainHTTP(docker.MatchLocalhost))) } + tm := task.NewBackgroundTaskManager(maxConcurrency, 5*time.Second) + r, err := layer.NewResolver(root, tm, cfg) + if err != nil { + return nil, errors.Wrapf(err, "failed to setup resolver") + } + + var ns *metrics.Namespace + if !cfg.NoPrometheus { + ns = metrics.NewNamespace("stargz", "fs", nil) + } + c := fsmetrics.NewLayerMetrics(ns) + if ns != nil { + metrics.Register(ns) + } + return &filesystem{ - resolver: remote.NewResolver(httpCache, cfg.BlobConfig), + resolver: r, getSources: getSources, - fsCache: fsCache, prefetchSize: cfg.PrefetchSize, - prefetchTimeout: prefetchTimeout, noprefetch: cfg.NoPrefetch, noBackgroundFetch: cfg.NoBackgroundFetch, debug: cfg.Debug, - layer: make(map[string]*layer), - resolveResult: lru.New(resolveResultEntry), - blobResult: lru.New(resolveResultEntry), - backgroundTaskManager: task.NewBackgroundTaskManager(maxConcurrency, 5*time.Second), + layer: make(map[string]layer.Layer), + backgroundTaskManager: tm, allowNoVerification: cfg.AllowNoVerification, disableVerification: cfg.DisableVerification, + metricsController: c, }, nil } type filesystem struct { - resolver *remote.Resolver - fsCache cache.BlobCache + resolver *layer.Resolver prefetchSize int64 - prefetchTimeout time.Duration noprefetch bool noBackgroundFetch bool debug bool - layer map[string]*layer + layer map[string]layer.Layer layerMu sync.Mutex - resolveResult *lru.Cache - resolveResultMu sync.Mutex - blobResult *lru.Cache - blobResultMu sync.Mutex backgroundTaskManager *task.BackgroundTaskManager allowNoVerification bool disableVerification bool getSources source.GetSources - resolveG singleflight.Group + metricsController *fsmetrics.Controller } -func (fs *filesystem) Mount(ctx context.Context, mountpoint string, labels map[string]string) error { +func (fs *filesystem) Mount(ctx context.Context, mountpoint string, labels map[string]string) (retErr error) { // This is a prioritized task and all background tasks will be stopped // execution so this can avoid being disturbed for NW traffic by background // tasks. @@ -212,13 +171,13 @@ func (fs *filesystem) Mount(ctx context.Context, mountpoint string, labels map[s // Resolve the target layer var ( - resultChan = make(chan *layer) + resultChan = make(chan layer.Layer) errChan = make(chan error) ) go func() { rErr := fmt.Errorf("failed to resolve target") for _, s := range src { - l, err := fs.resolveLayer(ctx, s.Hosts, s.Name, s.Target) + l, err := fs.resolver.Resolve(ctx, s.Hosts, s.Name, s.Target) if err == nil { resultChan <- l return @@ -229,16 +188,23 @@ func (fs *filesystem) Mount(ctx context.Context, mountpoint string, labels map[s errChan <- rErr }() - // Also resolve other layers in parallel + // Also resolve and cache other layers in parallel preResolve := src[0] // TODO: should we pre-resolve blobs in other sources as well? - for _, desc := range preResolve.Manifest.Layers { - if desc.Digest.String() != preResolve.Target.Digest.String() { - go fs.resolveLayer(ctx, preResolve.Hosts, preResolve.Name, desc) - } + for _, desc := range neighboringLayers(preResolve.Manifest, preResolve.Target) { + desc := desc + go func() { + // Avoids to get canceled by client. + ctx := log.WithLogger(context.Background(), + log.G(ctx).WithField("mountpoint", mountpoint)) + _, err := fs.resolver.Resolve(ctx, preResolve.Hosts, preResolve.Name, desc) + if err != nil { + log.G(ctx).WithError(err).Debug("failed to pre-resolve") + } + }() } // Wait for resolving completion - var l *layer + var l layer.Layer select { case l = <-resultChan: case err := <-errChan: @@ -252,7 +218,7 @@ func (fs *filesystem) Mount(ctx context.Context, mountpoint string, labels map[s // Verify layer's content if fs.disableVerification { // Skip if verification is disabled completely - l.skipVerify() + l.SkipVerify() log.G(ctx).Debugf("Verification forcefully skipped") } else if tocDigest, ok := labels[estargz.TOCJSONDigestAnnotation]; ok { // Verify this layer using the TOC JSON digest passed through label. @@ -261,7 +227,7 @@ func (fs *filesystem) Mount(ctx context.Context, mountpoint string, labels map[s log.G(ctx).WithError(err).Debugf("failed to parse passed TOC digest %q", dgst) return errors.Wrapf(err, "invalid TOC digest: %v", tocDigest) } - if err := l.verify(dgst); err != nil { + if err := l.Verify(dgst); err != nil { log.G(ctx).WithError(err).Debugf("invalid layer") return errors.Wrapf(err, "invalid stargz layer") } @@ -270,22 +236,18 @@ func (fs *filesystem) Mount(ctx context.Context, mountpoint string, labels map[s // If unverified layer is allowed, use it with warning. // This mode is for legacy stargz archives which don't contain digests // necessary for layer verification. - l.skipVerify() + l.SkipVerify() log.G(ctx).Warningf("No verification is held for layer") } else { // Verification must be done. Don't mount this layer. return fmt.Errorf("digest of TOC JSON must be passed") } - layerReader, err := l.reader() - if err != nil { - log.G(ctx).WithError(err).Warningf("failed to get reader for layer") - return err - } // Register the mountpoint layer fs.layerMu.Lock() fs.layer[mountpoint] = l fs.layerMu.Unlock() + fs.metricsController.Add(mountpoint, l) // Prefetch this layer. We prefetch several layers in parallel. The first // Check() for this layer waits for the prefetch completion. @@ -299,7 +261,7 @@ func (fs *filesystem) Mount(ctx context.Context, mountpoint string, labels map[s go func() { fs.backgroundTaskManager.DoPrioritizedTask() defer fs.backgroundTaskManager.DonePrioritizedTask() - if err := l.prefetch(prefetchSize); err != nil { + if err := l.Prefetch(prefetchSize); err != nil { log.G(ctx).WithError(err).Debug("failed to prefetched layer") return } @@ -313,21 +275,7 @@ func (fs *filesystem) Mount(ctx context.Context, mountpoint string, labels map[s // about NW traffic. if !fs.noBackgroundFetch { go func() { - br := io.NewSectionReader(readerAtFunc(func(p []byte, offset int64) (retN int, retErr error) { - fs.backgroundTaskManager.InvokeBackgroundTask(func(ctx context.Context) { - retN, retErr = l.blob.ReadAt( - p, - offset, - remote.WithContext(ctx), // Make cancellable - remote.WithCacheOpts(cache.Direct()), // Do not pollute mem cache - ) - }, 120*time.Second) - return - }), 0, l.blob.Size()) - if err := layerReader.Cache( - reader.WithReader(br), // Read contents in background - reader.WithCacheOpts(cache.Direct()), // Do not pollute mem cache - ); err != nil { + if err := l.BackgroundFetch(); err != nil { log.G(ctx).WithError(err).Debug("failed to fetch whole layer") return } @@ -340,9 +288,9 @@ func (fs *filesystem) Mount(ctx context.Context, mountpoint string, labels map[s timeSec := time.Second rawFS := fusefs.NewNodeFS(&node{ fs: fs, - layer: layerReader, - e: l.root, - s: newState(l.desc.Digest.String(), l.blob), + layer: l, + e: l.Root(), + s: newState(l), root: mountpoint, }, &fusefs.Options{ AttrTimeout: &timeSec, @@ -364,79 +312,6 @@ func (fs *filesystem) Mount(ctx context.Context, mountpoint string, labels map[s return server.WaitMount() } -func (fs *filesystem) resolveLayer(ctx context.Context, hosts docker.RegistryHosts, refspec reference.Spec, desc ocispec.Descriptor) (*layer, error) { - name := refspec.String() + "/" + desc.Digest.String() - ctx, cancel := context.WithCancel(log.WithLogger(ctx, log.G(ctx).WithField("src", name))) - defer cancel() - - fs.resolveResultMu.Lock() - c, ok := fs.resolveResult.Get(name) - fs.resolveResultMu.Unlock() - if ok && c.(*layer).blob.Check() == nil { - return c.(*layer), nil - } - - resultChan := fs.resolveG.DoChan(name, func() (interface{}, error) { - log.G(ctx).Debugf("resolving") - - // Resolve the blob. The result will be cached for future use. This is effective - // in some failure cases including resolving is succeeded but the blob is non-stargz. - var blob remote.Blob - fs.blobResultMu.Lock() - c, ok := fs.blobResult.Get(name) - fs.blobResultMu.Unlock() - if ok && c.(remote.Blob).Check() == nil { - blob = c.(remote.Blob) - } else { - var err error - blob, err = fs.resolver.Resolve(ctx, hosts, refspec, desc) - if err != nil { - log.G(ctx).WithError(err).Debugf("failed to resolve source") - return nil, errors.Wrap(err, "failed to resolve the source") - } - fs.blobResultMu.Lock() - fs.blobResult.Add(name, blob) - fs.blobResultMu.Unlock() - } - - // Get a reader for stargz archive. - // Each file's read operation is a prioritized task and all background tasks - // will be stopped during the execution so this can avoid being disturbed for - // NW traffic by background tasks. - sr := io.NewSectionReader(readerAtFunc(func(p []byte, offset int64) (n int, err error) { - fs.backgroundTaskManager.DoPrioritizedTask() - defer fs.backgroundTaskManager.DonePrioritizedTask() - return blob.ReadAt(p, offset) - }), 0, blob.Size()) - vr, root, err := reader.NewReader(sr, fs.fsCache) - if err != nil { - log.G(ctx).WithError(err).Debugf("failed to resolve: layer cannot be read") - return nil, errors.Wrap(err, "failed to read layer") - } - - // Combine layer information together - l := newLayer(desc, blob, vr, root, fs.prefetchTimeout) - fs.resolveResultMu.Lock() - fs.resolveResult.Add(name, l) - fs.resolveResultMu.Unlock() - - log.G(ctx).Debugf("resolved") - return l, nil - }) - - var res singleflight.Result - select { - case res = <-resultChan: - case <-time.After(30 * time.Second): - fs.resolveG.Forget(name) - return nil, fmt.Errorf("failed to resolve layer (timeout)") - } - if res.Err != nil || res.Val == nil { - return nil, fmt.Errorf("failed to resolve layer: %v", res.Err) - } - return res.Val.(*layer), nil -} - func (fs *filesystem) Check(ctx context.Context, mountpoint string, labels map[string]string) error { // This is a prioritized task and all background tasks will be stopped // execution so this can avoid being disturbed for NW traffic by background @@ -462,7 +337,7 @@ func (fs *filesystem) Check(ctx context.Context, mountpoint string, labels map[s // Wait for prefetch compeletion if !fs.noprefetch { - if err := l.waitForPrefetchCompletion(); err != nil { + if err := l.WaitForPrefetchCompletion(); err != nil { log.G(ctx).WithError(err).Warn("failed to sync with prefetch completion") } } @@ -470,8 +345,8 @@ func (fs *filesystem) Check(ctx context.Context, mountpoint string, labels map[s return nil } -func (fs *filesystem) check(ctx context.Context, l *layer, labels map[string]string) error { - err := l.blob.Check() +func (fs *filesystem) check(ctx context.Context, l layer.Layer, labels map[string]string) error { + err := l.Check() if err == nil { return nil } @@ -489,7 +364,7 @@ func (fs *filesystem) check(ctx context.Context, l *layer, labels map[string]str for retry := 0; retry < retrynum; retry++ { log.G(ctx).Warnf("refreshing(%d)...", retry) for _, s := range src { - err := l.blob.Refresh(ctx, s.Hosts, s.Name, s.Target) + err := l.Refresh(ctx, s.Hosts, s.Name, s.Target) if err == nil { log.G(ctx).Debug("Successfully refreshed connection") return nil @@ -512,6 +387,7 @@ func (fs *filesystem) Unmount(ctx context.Context, mountpoint string) error { } delete(fs.layer, mountpoint) // unregisters the corresponding layer fs.layerMu.Unlock() + fs.metricsController.Remove(mountpoint) // The goroutine which serving the mountpoint possibly becomes not responding. // In case of such situations, we use MNT_FORCE here and abort the connection. // In the future, we might be able to consider to kill that specific hanging @@ -520,132 +396,16 @@ func (fs *filesystem) Unmount(ctx context.Context, mountpoint string) error { return syscall.Unmount(mountpoint, syscall.MNT_FORCE) } -func newLayer(desc ocispec.Descriptor, blob remote.Blob, vr *reader.VerifiableReader, root *estargz.TOCEntry, prefetchTimeout time.Duration) *layer { - return &layer{ - desc: desc, - blob: blob, - verifiableReader: vr, - root: root, - prefetchWaiter: newWaiter(), - prefetchTimeout: prefetchTimeout, +// neighboringLayers returns layer descriptors except the `target` layer in the specified manifest. +func neighboringLayers(manifest ocispec.Manifest, target ocispec.Descriptor) (descs []ocispec.Descriptor) { + for _, desc := range manifest.Layers { + if desc.Digest.String() != target.Digest.String() { + descs = append(descs, desc) + } } -} - -type layer struct { - desc ocispec.Descriptor - blob remote.Blob - verifiableReader *reader.VerifiableReader - root *estargz.TOCEntry - prefetchWaiter *waiter - prefetchTimeout time.Duration - r reader.Reader -} - -func (l *layer) reader() (reader.Reader, error) { - if l.r == nil { - return nil, fmt.Errorf("layer hasn't been verified yet") - } - return l.r, nil -} - -func (l *layer) skipVerify() { - l.r = l.verifiableReader.SkipVerify() -} - -func (l *layer) verify(tocDigest digest.Digest) (err error) { - l.r, err = l.verifiableReader.VerifyTOC(tocDigest) return } -func (l *layer) prefetch(prefetchSize int64) error { - defer l.prefetchWaiter.done() // Notify the completion - - lr, err := l.reader() - if err != nil { - return err - } - if _, ok := lr.Lookup(estargz.NoPrefetchLandmark); ok { - // do not prefetch this layer - return nil - } else if e, ok := lr.Lookup(estargz.PrefetchLandmark); ok { - // override the prefetch size with optimized value - prefetchSize = e.Offset - } else if prefetchSize > l.blob.Size() { - // adjust prefetch size not to exceed the whole layer size - prefetchSize = l.blob.Size() - } - - // Fetch the target range - if err := l.blob.Cache(0, prefetchSize); err != nil { - return errors.Wrap(err, "failed to prefetch layer") - } - - // Cache uncompressed contents of the prefetched range - if err := lr.Cache(reader.WithFilter(func(e *estargz.TOCEntry) bool { - return e.Offset < prefetchSize // Cache only prefetch target - })); err != nil { - return errors.Wrap(err, "failed to cache prefetched layer") - } - - return nil -} - -func (l *layer) waitForPrefetchCompletion() error { - return l.prefetchWaiter.wait(l.prefetchTimeout) -} - -func newWaiter() *waiter { - return &waiter{ - completionCond: sync.NewCond(&sync.Mutex{}), - } -} - -type waiter struct { - isDone bool - isDoneMu sync.Mutex - completionCond *sync.Cond -} - -func (w *waiter) done() { - w.isDoneMu.Lock() - w.isDone = true - w.isDoneMu.Unlock() - w.completionCond.Broadcast() -} - -func (w *waiter) wait(timeout time.Duration) error { - wait := func() <-chan struct{} { - ch := make(chan struct{}) - go func() { - w.isDoneMu.Lock() - isDone := w.isDone - w.isDoneMu.Unlock() - - w.completionCond.L.Lock() - if !isDone { - w.completionCond.Wait() - } - w.completionCond.L.Unlock() - ch <- struct{}{} - }() - return ch - } - select { - case <-time.After(timeout): - w.isDoneMu.Lock() - w.isDone = true - w.isDoneMu.Unlock() - w.completionCond.Broadcast() - return fmt.Errorf("timeout(%v)", timeout) - case <-wait(): - return nil - } -} - -type readerAtFunc func([]byte, int64) (int, error) - -func (f readerAtFunc) ReadAt(p []byte, offset int64) (int, error) { return f(p, offset) } - type fileReader interface { OpenFile(name string) (io.ReaderAt, error) } @@ -786,12 +546,14 @@ func (n *node) Getattr(ctx context.Context, f fusefs.FileHandle, out *fuse.AttrO var _ = (fusefs.NodeGetxattrer)((*node)(nil)) func (n *node) Getxattr(ctx context.Context, attr string, dest []byte) (uint32, syscall.Errno) { - if attr == opaqueXattr && n.opaque { - // This node is an opaque directory so give overlayfs-compliant indicator. - if len(dest) < len(opaqueXattrValue) { - return uint32(len(opaqueXattrValue)), syscall.ERANGE + for _, opaqueXattr := range opaqueXattrs { + if attr == opaqueXattr && n.opaque { + // This node is an opaque directory so give overlayfs-compliant indicator. + if len(dest) < len(opaqueXattrValue) { + return uint32(len(opaqueXattrValue)), syscall.ERANGE + } + return uint32(copy(dest, opaqueXattrValue)), 0 } - return uint32(copy(dest, opaqueXattrValue)), 0 } if v, ok := n.e.Xattrs[attr]; ok { if len(dest) < len(v) { @@ -808,7 +570,9 @@ func (n *node) Listxattr(ctx context.Context, dest []byte) (uint32, syscall.Errn var attrs []byte if n.opaque { // This node is an opaque directory so add overlayfs-compliant indicator. - attrs = append(attrs, []byte(opaqueXattr+"\x00")...) + for _, opaqueXattr := range opaqueXattrs { + attrs = append(attrs, []byte(opaqueXattr+"\x00")...) + } } for k := range n.e.Xattrs { attrs = append(attrs, []byte(k+"\x00")...) @@ -879,15 +643,16 @@ func (w *whiteout) Statfs(ctx context.Context, out *fuse.StatfsOut) syscall.Errn // newState provides new state directory node. // It creates statFile at the same time to give it stable inode number. -func newState(digest string, blob remote.Blob) *state { +func newState(layer layer.Layer) *state { + info := layer.Info() return &state{ statFile: &statFile{ - name: digest + ".json", + name: info.Digest.String() + ".json", statJSON: statJSON{ - Digest: digest, - Size: blob.Size(), + Digest: info.Digest.String(), + Size: info.Size, }, - blob: blob, + layer: layer, }, } } @@ -960,7 +725,7 @@ type statJSON struct { type statFile struct { fusefs.Inode name string - blob remote.Blob + layer layer.Layer statJSON statJSON mu sync.Mutex } @@ -1020,7 +785,7 @@ func (sf *statFile) attr(out *fuse.Attr) (fusefs.StableAttr, syscall.Errno) { } func (sf *statFile) updateStatUnlocked() ([]byte, error) { - sf.statJSON.FetchedSize = sf.blob.FetchedSize() + sf.statJSON.FetchedSize = sf.layer.Info().FetchedSize sf.statJSON.FetchedPercent = float64(sf.statJSON.FetchedSize) / float64(sf.statJSON.Size) * 100.0 j, err := json.Marshal(&sf.statJSON) if err != nil { @@ -1157,11 +922,13 @@ func statFileToAttr(sf *statFile, size uint64, out *fuse.Attr) fusefs.StableAttr // modeOfEntry gets system's mode bits from TOCEntry func modeOfEntry(e *estargz.TOCEntry) uint32 { + m := e.Stat().Mode() + // Permission bits - res := uint32(e.Stat().Mode() & os.ModePerm) + res := uint32(m & os.ModePerm) // File type bits - switch e.Stat().Mode() & os.ModeType { + switch m & os.ModeType { case os.ModeDevice: res |= syscall.S_IFBLK case os.ModeDevice | os.ModeCharDevice: @@ -1178,20 +945,14 @@ func modeOfEntry(e *estargz.TOCEntry) uint32 { res |= syscall.S_IFREG } - // SUID, SGID, Sticky bits - // Stargz package doesn't provide these bits so let's calculate them manually - // here. TOCEntry.Mode is a copy of tar.Header.Mode so we can understand the - // mode using that package. - // See also: - // - https://github.com/google/crfs/blob/71d77da419c90be7b05d12e59945ac7a8c94a543/stargz/stargz.go#L706 - hm := (&tar.Header{Mode: e.Mode}).FileInfo().Mode() - if hm&os.ModeSetuid != 0 { + // suid, sgid, sticky bits + if m&os.ModeSetuid != 0 { res |= syscall.S_ISUID } - if hm&os.ModeSetgid != 0 { + if m&os.ModeSetgid != 0 { res |= syscall.S_ISGID } - if hm&os.ModeSticky != 0 { + if m&os.ModeSticky != 0 { res |= syscall.S_ISVTX } diff --git a/vendor/github.com/containerd/stargz-snapshotter/fs/layer/layer.go b/vendor/github.com/containerd/stargz-snapshotter/fs/layer/layer.go new file mode 100644 index 00000000..db007f09 --- /dev/null +++ b/vendor/github.com/containerd/stargz-snapshotter/fs/layer/layer.go @@ -0,0 +1,450 @@ +/* + Copyright The containerd Authors. + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. +*/ + +/* + Copyright 2019 The Go Authors. All rights reserved. + Use of this source code is governed by a BSD-style + license that can be found in the NOTICE.md file. +*/ + +package layer + +import ( + "bytes" + "context" + "fmt" + "io" + "os" + "path/filepath" + "sync" + "time" + + "github.com/containerd/containerd/log" + "github.com/containerd/containerd/reference" + "github.com/containerd/containerd/remotes/docker" + "github.com/containerd/stargz-snapshotter/cache" + "github.com/containerd/stargz-snapshotter/estargz" + "github.com/containerd/stargz-snapshotter/fs/config" + "github.com/containerd/stargz-snapshotter/fs/reader" + "github.com/containerd/stargz-snapshotter/fs/remote" + "github.com/containerd/stargz-snapshotter/task" + "github.com/containerd/stargz-snapshotter/util/lrucache" + "github.com/golang/groupcache/lru" + digest "github.com/opencontainers/go-digest" + ocispec "github.com/opencontainers/image-spec/specs-go/v1" + "github.com/pkg/errors" + "golang.org/x/sync/singleflight" +) + +const ( + defaultResolveResultEntry = 30 + defaultMaxLRUCacheEntry = 10 + defaultMaxCacheFds = 10 + defaultPrefetchTimeoutSec = 10 + memoryCacheType = "memory" +) + +// Layer represents a layer. +type Layer interface { + + // Info returns the information of this layer. + Info() Info + + // Root returns the root node of this layer. + Root() *estargz.TOCEntry + + // Check checks if the layer is still connectable. + Check() error + + // Refresh refreshes the layer connection. + Refresh(ctx context.Context, hosts docker.RegistryHosts, refspec reference.Spec, desc ocispec.Descriptor) error + + // Verify verifies this layer using the passed TOC Digest. + Verify(tocDigest digest.Digest) (err error) + + // SkipVerify skips verification for this layer. + SkipVerify() + + // OpenFile opens a file. + // Calling this function before calling Verify or SkipVerify will fail. + OpenFile(name string) (io.ReaderAt, error) + + // Prefetch prefetches the specified size. If the layer is eStargz and contains landmark files, + // the range indicated by these files is respected. + // Calling this function before calling Verify or SkipVerify will fail. + Prefetch(prefetchSize int64) error + + // WaitForPrefetchCompletion waits untils Prefetch completes. + WaitForPrefetchCompletion() error + + // BackgroundFetch fetches the entire layer contents to the cache. + // Fetching contents is done as a background task. + // Calling this function before calling Verify or SkipVerify will fail. + BackgroundFetch() error +} + +// Info is the current status of a layer. +type Info struct { + Digest digest.Digest + Size int64 + FetchedSize int64 +} + +// Resolver resolves the layer location and provieds the handler of that layer. +type Resolver struct { + resolver *remote.Resolver + prefetchTimeout time.Duration + layerCache *lru.Cache + layerCacheMu sync.Mutex + blobCache *lru.Cache + blobCacheMu sync.Mutex + backgroundTaskManager *task.BackgroundTaskManager + fsCache cache.BlobCache + resolveG singleflight.Group +} + +// NewResolver returns a new layer resolver. +func NewResolver(root string, backgroundTaskManager *task.BackgroundTaskManager, cfg config.Config) (*Resolver, error) { + resolveResultEntry := cfg.ResolveResultEntry + if resolveResultEntry == 0 { + resolveResultEntry = defaultResolveResultEntry + } + prefetchTimeout := time.Duration(cfg.PrefetchTimeoutSec) * time.Second + if prefetchTimeout == 0 { + prefetchTimeout = defaultPrefetchTimeoutSec * time.Second + } + + // Prepare contents cache + fsCache, err := newCache(filepath.Join(root, "fscache"), cfg.FSCacheType, cfg) + if err != nil { + return nil, errors.Wrapf(err, "failed to create fs cache") + } + httpCache, err := newCache(filepath.Join(root, "httpcache"), cfg.HTTPCacheType, cfg) + if err != nil { + return nil, errors.Wrapf(err, "failed to create http cache") + } + + return &Resolver{ + resolver: remote.NewResolver(httpCache, cfg.BlobConfig), + fsCache: fsCache, + layerCache: lru.New(resolveResultEntry), + blobCache: lru.New(resolveResultEntry), + prefetchTimeout: prefetchTimeout, + backgroundTaskManager: backgroundTaskManager, + }, nil +} + +func newCache(cachepath string, cacheType string, cfg config.Config) (cache.BlobCache, error) { + if cacheType == memoryCacheType { + return cache.NewMemoryCache(), nil + } + + dcc := cfg.DirectoryCacheConfig + maxDataEntry := dcc.MaxLRUCacheEntry + if maxDataEntry == 0 { + maxDataEntry = defaultMaxLRUCacheEntry + } + maxFdEntry := dcc.MaxCacheFds + if maxFdEntry == 0 { + maxFdEntry = defaultMaxCacheFds + } + + bufPool := &sync.Pool{ + New: func() interface{} { + return new(bytes.Buffer) + }, + } + dCache, fCache := lrucache.New(maxDataEntry), lrucache.New(maxFdEntry) + dCache.OnEvicted = func(key string, value interface{}) { + bufPool.Put(value) + } + fCache.OnEvicted = func(key string, value interface{}) { + value.(*os.File).Close() + } + return cache.NewDirectoryCache( + cachepath, + cache.DirectoryCacheConfig{ + SyncAdd: dcc.SyncAdd, + DataCache: dCache, + FdCache: fCache, + BufPool: bufPool, + }, + ) +} + +// Resolve resolves a layer based on the passed layer blob information. +func (r *Resolver) Resolve(ctx context.Context, hosts docker.RegistryHosts, refspec reference.Spec, desc ocispec.Descriptor) (_ Layer, retErr error) { + name := refspec.String() + "/" + desc.Digest.String() + ctx = log.WithLogger(ctx, log.G(ctx).WithField("src", name)) + + // First, try to retrieve this layer from the underlying LRU cache. + r.layerCacheMu.Lock() + c, ok := r.layerCache.Get(name) + r.layerCacheMu.Unlock() + if ok && c.(*layer).Check() == nil { + return c.(*layer), nil + } + + resultChan := r.resolveG.DoChan(name, func() (interface{}, error) { + log.G(ctx).Debugf("resolving") + + // Resolve the blob. + blobR, err := r.resolveBlob(ctx, hosts, refspec, desc) + if err != nil { + return nil, errors.Wrapf(err, "failed to resolve the blob") + } + + // Get a reader for stargz archive. + // Each file's read operation is a prioritized task and all background tasks + // will be stopped during the execution so this can avoid being disturbed for + // NW traffic by background tasks. + sr := io.NewSectionReader(readerAtFunc(func(p []byte, offset int64) (n int, err error) { + r.backgroundTaskManager.DoPrioritizedTask() + defer r.backgroundTaskManager.DonePrioritizedTask() + return blobR.ReadAt(p, offset) + }), 0, blobR.Size()) + vr, root, err := reader.NewReader(sr, r.fsCache) + if err != nil { + return nil, errors.Wrap(err, "failed to read layer") + } + + // Combine layer information together + l := newLayer(r, desc, blobR, vr, root) + r.layerCacheMu.Lock() + r.layerCache.Add(name, l) + r.layerCacheMu.Unlock() + + log.G(ctx).Debugf("resolved") + return l, nil + }) + + var res singleflight.Result + select { + case res = <-resultChan: + case <-time.After(30 * time.Second): + r.resolveG.Forget(name) + return nil, fmt.Errorf("failed to resolve layer (timeout)") + } + if res.Err != nil || res.Val == nil { + return nil, fmt.Errorf("failed to resolve layer: %v", res.Err) + } + + return res.Val.(*layer), nil +} + +// resolveBlob resolves a blob based on the passed layer blob information. +func (r *Resolver) resolveBlob(ctx context.Context, hosts docker.RegistryHosts, refspec reference.Spec, desc ocispec.Descriptor) (remote.Blob, error) { + name := refspec.String() + "/" + desc.Digest.String() + + // Resolve the blob. The result will be cached for future use. This is effective + // in some failure cases including resolving is succeeded but the blob is non-stargz. + var blob remote.Blob + r.blobCacheMu.Lock() + c, ok := r.blobCache.Get(name) + r.blobCacheMu.Unlock() + if ok { + if blob := c.(remote.Blob); blob.Check() == nil { + return blob, nil + } + } + + var err error + blob, err = r.resolver.Resolve(ctx, hosts, refspec, desc) + if err != nil { + log.G(ctx).WithError(err).Debugf("failed to resolve source") + return nil, errors.Wrap(err, "failed to resolve the source") + } + r.blobCacheMu.Lock() + r.blobCache.Add(name, blob) + r.blobCacheMu.Unlock() + + return blob, nil +} + +func newLayer( + resolver *Resolver, + desc ocispec.Descriptor, + blob remote.Blob, + vr *reader.VerifiableReader, + root *estargz.TOCEntry, +) *layer { + return &layer{ + resolver: resolver, + desc: desc, + blob: blob, + verifiableReader: vr, + root: root, + prefetchWaiter: newWaiter(), + } +} + +type layer struct { + resolver *Resolver + desc ocispec.Descriptor + blob remote.Blob + verifiableReader *reader.VerifiableReader + root *estargz.TOCEntry + prefetchWaiter *waiter + + r reader.Reader +} + +func (l *layer) Info() Info { + return Info{ + Digest: l.desc.Digest, + Size: l.blob.Size(), + FetchedSize: l.blob.FetchedSize(), + } +} + +func (l *layer) Root() *estargz.TOCEntry { + return l.root +} + +func (l *layer) Check() error { + return l.blob.Check() +} + +func (l *layer) Refresh(ctx context.Context, hosts docker.RegistryHosts, refspec reference.Spec, desc ocispec.Descriptor) error { + return l.blob.Refresh(ctx, hosts, refspec, desc) +} + +func (l *layer) Verify(tocDigest digest.Digest) (err error) { + l.r, err = l.verifiableReader.VerifyTOC(tocDigest) + return +} + +func (l *layer) SkipVerify() { + l.r = l.verifiableReader.SkipVerify() +} + +func (l *layer) OpenFile(name string) (io.ReaderAt, error) { + if l.r == nil { + return nil, fmt.Errorf("layer hasn't been verified yet") + } + return l.r.OpenFile(name) +} + +func (l *layer) Prefetch(prefetchSize int64) error { + defer l.prefetchWaiter.done() // Notify the completion + + if l.r == nil { + return fmt.Errorf("layer hasn't been verified yet") + } + lr := l.r + if _, ok := lr.Lookup(estargz.NoPrefetchLandmark); ok { + // do not prefetch this layer + return nil + } else if e, ok := lr.Lookup(estargz.PrefetchLandmark); ok { + // override the prefetch size with optimized value + prefetchSize = e.Offset + } else if prefetchSize > l.blob.Size() { + // adjust prefetch size not to exceed the whole layer size + prefetchSize = l.blob.Size() + } + + // Fetch the target range + if err := l.blob.Cache(0, prefetchSize); err != nil { + return errors.Wrap(err, "failed to prefetch layer") + } + + // Cache uncompressed contents of the prefetched range + if err := lr.Cache(reader.WithFilter(func(e *estargz.TOCEntry) bool { + return e.Offset < prefetchSize // Cache only prefetch target + })); err != nil { + return errors.Wrap(err, "failed to cache prefetched layer") + } + + return nil +} + +func (l *layer) WaitForPrefetchCompletion() error { + return l.prefetchWaiter.wait(l.resolver.prefetchTimeout) +} + +func (l *layer) BackgroundFetch() error { + if l.r == nil { + return fmt.Errorf("layer hasn't been verified yet") + } + lr := l.r + br := io.NewSectionReader(readerAtFunc(func(p []byte, offset int64) (retN int, retErr error) { + l.resolver.backgroundTaskManager.InvokeBackgroundTask(func(ctx context.Context) { + retN, retErr = l.blob.ReadAt( + p, + offset, + remote.WithContext(ctx), // Make cancellable + remote.WithCacheOpts(cache.Direct()), // Do not pollute mem cache + ) + }, 120*time.Second) + return + }), 0, l.blob.Size()) + return lr.Cache( + reader.WithReader(br), // Read contents in background + reader.WithCacheOpts(cache.Direct()), // Do not pollute mem cache + ) +} + +func newWaiter() *waiter { + return &waiter{ + completionCond: sync.NewCond(&sync.Mutex{}), + } +} + +type waiter struct { + isDone bool + isDoneMu sync.Mutex + completionCond *sync.Cond +} + +func (w *waiter) done() { + w.isDoneMu.Lock() + w.isDone = true + w.isDoneMu.Unlock() + w.completionCond.Broadcast() +} + +func (w *waiter) wait(timeout time.Duration) error { + wait := func() <-chan struct{} { + ch := make(chan struct{}) + go func() { + w.isDoneMu.Lock() + isDone := w.isDone + w.isDoneMu.Unlock() + + w.completionCond.L.Lock() + if !isDone { + w.completionCond.Wait() + } + w.completionCond.L.Unlock() + ch <- struct{}{} + }() + return ch + } + select { + case <-time.After(timeout): + w.isDoneMu.Lock() + w.isDone = true + w.isDoneMu.Unlock() + w.completionCond.Broadcast() + return fmt.Errorf("timeout(%v)", timeout) + case <-wait(): + return nil + } +} + +type readerAtFunc func([]byte, int64) (int, error) + +func (f readerAtFunc) ReadAt(p []byte, offset int64) (int, error) { return f(p, offset) } diff --git a/vendor/github.com/containerd/stargz-snapshotter/fs/metrics/layer.go b/vendor/github.com/containerd/stargz-snapshotter/fs/metrics/layer.go new file mode 100644 index 00000000..495901b8 --- /dev/null +++ b/vendor/github.com/containerd/stargz-snapshotter/fs/metrics/layer.go @@ -0,0 +1,52 @@ +/* + Copyright The containerd Authors. + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. +*/ + +package metrics + +import ( + "github.com/containerd/stargz-snapshotter/fs/layer" + metrics "github.com/docker/go-metrics" + "github.com/prometheus/client_golang/prometheus" +) + +var layerMetrics = []*metric{ + { + name: "layer_fetched_size", + help: "Total fetched size of the layer", + unit: metrics.Bytes, + vt: prometheus.CounterValue, + getValues: func(l layer.Layer) []value { + return []value{ + { + v: float64(l.Info().FetchedSize), + }, + } + }, + }, + { + name: "layer_size", + help: "Total size of the layer", + unit: metrics.Bytes, + vt: prometheus.CounterValue, + getValues: func(l layer.Layer) []value { + return []value{ + { + v: float64(l.Info().Size), + }, + } + }, + }, +} diff --git a/vendor/github.com/containerd/stargz-snapshotter/fs/metrics/metrics.go b/vendor/github.com/containerd/stargz-snapshotter/fs/metrics/metrics.go new file mode 100644 index 00000000..5381d018 --- /dev/null +++ b/vendor/github.com/containerd/stargz-snapshotter/fs/metrics/metrics.go @@ -0,0 +1,113 @@ +/* + Copyright The containerd Authors. + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. +*/ + +package metrics + +import ( + "sync" + + "github.com/containerd/stargz-snapshotter/fs/layer" + metrics "github.com/docker/go-metrics" + "github.com/prometheus/client_golang/prometheus" +) + +func NewLayerMetrics(ns *metrics.Namespace) *Controller { + if ns == nil { + return &Controller{} + } + c := &Controller{ + ns: ns, + layer: make(map[string]layer.Layer), + } + c.metrics = append(c.metrics, layerMetrics...) + ns.Add(c) + return c +} + +type Controller struct { + ns *metrics.Namespace + metrics []*metric + + layer map[string]layer.Layer + layerMu sync.RWMutex +} + +func (c *Controller) Describe(ch chan<- *prometheus.Desc) { + for _, e := range c.metrics { + ch <- e.desc(c.ns) + } +} + +func (c *Controller) Collect(ch chan<- prometheus.Metric) { + c.layerMu.RLock() + wg := &sync.WaitGroup{} + for mp, l := range c.layer { + mp, l := mp, l + wg.Add(1) + go func() { + defer wg.Done() + for _, e := range c.metrics { + e.collect(mp, l, c.ns, ch) + } + }() + } + c.layerMu.RUnlock() + wg.Wait() +} + +func (c *Controller) Add(key string, l layer.Layer) { + if c.ns == nil { + return + } + c.layerMu.Lock() + c.layer[key] = l + c.layerMu.Unlock() +} + +func (c *Controller) Remove(key string) { + if c.ns == nil { + return + } + c.layerMu.Lock() + delete(c.layer, key) + c.layerMu.Unlock() +} + +type value struct { + v float64 + l []string +} + +type metric struct { + name string + help string + unit metrics.Unit + vt prometheus.ValueType + labels []string + // getValues returns the value and labels for the data + getValues func(l layer.Layer) []value +} + +func (m *metric) desc(ns *metrics.Namespace) *prometheus.Desc { + return ns.NewDesc(m.name, m.help, m.unit, append([]string{"digest", "mountpoint"}, m.labels...)...) +} + +func (m *metric) collect(mountpoint string, l layer.Layer, ns *metrics.Namespace, ch chan<- prometheus.Metric) { + values := m.getValues(l) + for _, v := range values { + ch <- prometheus.MustNewConstMetric(m.desc(ns), m.vt, v.v, append([]string{l.Info().Digest.String(), mountpoint}, v.l...)...) + } +} diff --git a/vendor/github.com/containerd/stargz-snapshotter/fs/remote/resolver.go b/vendor/github.com/containerd/stargz-snapshotter/fs/remote/resolver.go index f4548f68..87893695 100644 --- a/vendor/github.com/containerd/stargz-snapshotter/fs/remote/resolver.go +++ b/vendor/github.com/containerd/stargz-snapshotter/fs/remote/resolver.go @@ -32,7 +32,6 @@ import ( "mime" "mime/multipart" "net/http" - "net/url" "path" "strconv" "strings" @@ -54,7 +53,7 @@ const ( defaultFetchTimeoutSec = 300 ) -func NewResolver(cache cache.BlobCache, cfg config.BlobConfig) *Resolver { +func NewResolver(blobCache cache.BlobCache, cfg config.BlobConfig) *Resolver { if cfg.ChunkSize == 0 { // zero means "use default chunk size" cfg.ChunkSize = defaultChunkSize } @@ -74,7 +73,7 @@ func NewResolver(cache cache.BlobCache, cfg config.BlobConfig) *Resolver { return new(bytes.Buffer) }, }, - blobCache: cache, + blobCache: blobCache, blobConfig: cfg, } } @@ -111,7 +110,7 @@ func newFetcher(ctx context.Context, hosts docker.RegistryHosts, refspec referen return nil, 0, fmt.Errorf("Digest is mandatory in layer descriptor") } digest := desc.Digest - u, err := url.Parse("dummy://" + refspec.Locator) + pullScope, err := docker.RepositoryScope(refspec, false) if err != nil { return nil, 0, err } @@ -132,9 +131,7 @@ func newFetcher(ctx context.Context, hosts docker.RegistryHosts, refspec referen tr = &transport{ inner: tr, auth: host.Authorizer, - // Specify pull scope - // TODO: The scope generator function in containerd (github.com/containerd/containerd/remotes/docker/scope.go) should be exported and used here. - scope: "repository:" + strings.TrimPrefix(u.Path, "/") + ":pull", + scope: pullScope, } } diff --git a/vendor/github.com/containerd/stargz-snapshotter/snapshot/snapshot.go b/vendor/github.com/containerd/stargz-snapshotter/snapshot/snapshot.go index 0f5fc962..7c18d316 100644 --- a/vendor/github.com/containerd/stargz-snapshotter/snapshot/snapshot.go +++ b/vendor/github.com/containerd/stargz-snapshotter/snapshot/snapshot.go @@ -29,10 +29,12 @@ import ( "github.com/containerd/containerd/log" "github.com/containerd/containerd/mount" "github.com/containerd/containerd/snapshots" + "github.com/containerd/containerd/snapshots/overlay/overlayutils" "github.com/containerd/containerd/snapshots/storage" "github.com/containerd/continuity/fs" "github.com/moby/sys/mountinfo" "github.com/pkg/errors" + "github.com/sirupsen/logrus" "golang.org/x/sync/errgroup" ) @@ -91,7 +93,8 @@ type snapshotter struct { asyncRemove bool // fs is a filesystem that this snapshotter recognizes. - fs FileSystem + fs FileSystem + userxattr bool // whether to enable "userxattr" mount option } // NewSnapshotter returns a Snapshotter which can use unpacked remote layers @@ -129,11 +132,17 @@ func NewSnapshotter(ctx context.Context, root string, targetFs FileSystem, opts return nil, err } + userxattr, err := overlayutils.NeedsUserXAttr(root) + if err != nil { + logrus.WithError(err).Warnf("cannot detect whether \"userxattr\" option needs to be used, assuming to be %v", userxattr) + } + o := &snapshotter{ root: root, ms: ms, asyncRemove: config.asyncRemove, fs: targetFs, + userxattr: userxattr, } if err := o.restoreRemoteSnapshot(ctx); err != nil { @@ -598,6 +607,9 @@ func (o *snapshotter) mounts(ctx context.Context, s storage.Snapshot, checkKey s } options = append(options, fmt.Sprintf("lowerdir=%s", strings.Join(parentPaths, ":"))) + if o.userxattr { + options = append(options, "userxattr") + } return []mount.Mount{ { Type: "overlay", diff --git a/vendor/github.com/containerd/stargz-snapshotter/util/lrucache/lrucache.go b/vendor/github.com/containerd/stargz-snapshotter/util/lrucache/lrucache.go new file mode 100644 index 00000000..8bec3641 --- /dev/null +++ b/vendor/github.com/containerd/stargz-snapshotter/util/lrucache/lrucache.go @@ -0,0 +1,141 @@ +/* + Copyright The containerd Authors. + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. +*/ + +// Package lrucache provides reference-count-aware lru cache. +package lrucache + +import ( + "sync" + + "github.com/golang/groupcache/lru" +) + +// Cache is "groupcache/lru"-like cache. The difference is that "groupcache/lru" immediately +// finalizes theevicted contents using OnEvicted callback but our version strictly tracks the +// reference counts of contents and calls OnEvicted when nobody refers to the evicted contents. +type Cache struct { + cache *lru.Cache + mu sync.Mutex + + // OnEvicted optionally specifies a callback function to be + // executed when an entry is purged from the cache. + OnEvicted func(key string, value interface{}) +} + +// New creates new cache. +func New(maxEntries int) *Cache { + inner := lru.New(maxEntries) + inner.OnEvicted = func(key lru.Key, value interface{}) { + // Decrease the ref count incremented in Add(). + // When nobody refers to this value, this value will be finalized via refCounter. + value.(*refCounter).finalize() + } + return &Cache{ + cache: inner, + } +} + +// Get retrieves the specified object from the cache and increments the reference counter of the +// target content. Client must call `done` callback to decrease the reference count when the value +// will no longer be used. +func (c *Cache) Get(key string) (value interface{}, done func(), ok bool) { + c.mu.Lock() + defer c.mu.Unlock() + o, ok := c.cache.Get(key) + if !ok { + return nil, nil, false + } + rc := o.(*refCounter) + rc.inc() + return rc.v, c.decreaseOnceFunc(rc), true +} + +// Add adds object to the cache and returns the cached contents with incrementing the reference count. +// If the specified content already exists in the cache, this sets `added` to false and returns +// "already cached" content (i.e. doesn't replace the content with the new one). Client must call +// `done` callback to decrease the counter when the value will no longer be used. +func (c *Cache) Add(key string, value interface{}) (cachedValue interface{}, done func(), added bool) { + c.mu.Lock() + defer c.mu.Unlock() + if o, ok := c.cache.Get(key); ok { + rc := o.(*refCounter) + rc.inc() + return rc.v, c.decreaseOnceFunc(rc), false + } + rc := &refCounter{ + key: key, + v: value, + onEvicted: c.OnEvicted, + } + rc.initialize() // Keep this object having at least 1 ref count (will be decreased in OnEviction) + rc.inc() // The client references this object (will be decreased on "done") + c.cache.Add(key, rc) + return rc.v, c.decreaseOnceFunc(rc), true +} + +// Remove removes the specified contents from the cache. OnEvicted callback will be called when +// nobody refers to the removed content. +func (c *Cache) Remove(key string) { + c.mu.Lock() + defer c.mu.Unlock() + c.cache.Remove(key) +} + +func (c *Cache) decreaseOnceFunc(rc *refCounter) func() { + var once sync.Once + return func() { + c.mu.Lock() + defer c.mu.Unlock() + once.Do(func() { rc.dec() }) + } +} + +type refCounter struct { + onEvicted func(key string, value interface{}) + + key string + v interface{} + refCounts int64 + + mu sync.Mutex + + initializeOnce sync.Once + finalizeOnce sync.Once +} + +func (r *refCounter) inc() { + r.mu.Lock() + defer r.mu.Unlock() + r.refCounts++ +} + +func (r *refCounter) dec() { + r.mu.Lock() + defer r.mu.Unlock() + r.refCounts-- + if r.refCounts <= 0 && r.onEvicted != nil { + // nobody will refer this object + r.onEvicted(r.key, r.v) + } +} + +func (r *refCounter) initialize() { + r.initializeOnce.Do(func() { r.inc() }) +} + +func (r *refCounter) finalize() { + r.finalizeOnce.Do(func() { r.dec() }) +} diff --git a/vendor/github.com/containerd/stargz-snapshotter/util/namedmutex/namedmutex.go b/vendor/github.com/containerd/stargz-snapshotter/util/namedmutex/namedmutex.go new file mode 100644 index 00000000..2ca28fa7 --- /dev/null +++ b/vendor/github.com/containerd/stargz-snapshotter/util/namedmutex/namedmutex.go @@ -0,0 +1,62 @@ +/* + Copyright The containerd Authors. + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. +*/ + +// Package namedmutex provides NamedMutex that wraps sync.Mutex +// and provides namespaced mutex. +package namedmutex + +import ( + "sync" +) + +// NamedMutex wraps sync.Mutex and provides namespaced mutex. +type NamedMutex struct { + muMap map[string]*sync.Mutex + refMap map[string]int + + mu sync.Mutex +} + +// Lock locks the mutex of the given name +func (nl *NamedMutex) Lock(name string) { + nl.mu.Lock() + if nl.muMap == nil { + nl.muMap = make(map[string]*sync.Mutex) + } + if nl.refMap == nil { + nl.refMap = make(map[string]int) + } + if _, ok := nl.muMap[name]; !ok { + nl.muMap[name] = &sync.Mutex{} + } + mu := nl.muMap[name] + nl.refMap[name]++ + nl.mu.Unlock() + mu.Lock() +} + +// Unlock unlocks the mutex of the given name +func (nl *NamedMutex) Unlock(name string) { + nl.mu.Lock() + mu := nl.muMap[name] + nl.refMap[name]-- + if nl.refMap[name] <= 0 { + delete(nl.muMap, name) + delete(nl.refMap, name) + } + nl.mu.Unlock() + mu.Unlock() +} diff --git a/vendor/github.com/docker/go-metrics/CONTRIBUTING.md b/vendor/github.com/docker/go-metrics/CONTRIBUTING.md new file mode 100644 index 00000000..b8a512c3 --- /dev/null +++ b/vendor/github.com/docker/go-metrics/CONTRIBUTING.md @@ -0,0 +1,55 @@ +# Contributing + +## Sign your work + +The sign-off is a simple line at the end of the explanation for the patch. Your +signature certifies that you wrote the patch or otherwise have the right to pass +it on as an open-source patch. The rules are pretty simple: if you can certify +the below (from [developercertificate.org](http://developercertificate.org/)): + +``` +Developer Certificate of Origin +Version 1.1 + +Copyright (C) 2004, 2006 The Linux Foundation and its contributors. +660 York Street, Suite 102, +San Francisco, CA 94110 USA + +Everyone is permitted to copy and distribute verbatim copies of this +license document, but changing it is not allowed. + +Developer's Certificate of Origin 1.1 + +By making a contribution to this project, I certify that: + +(a) The contribution was created in whole or in part by me and I + have the right to submit it under the open source license + indicated in the file; or + +(b) The contribution is based upon previous work that, to the best + of my knowledge, is covered under an appropriate open source + license and I have the right under that license to submit that + work with modifications, whether created in whole or in part + by me, under the same open source license (unless I am + permitted to submit under a different license), as indicated + in the file; or + +(c) The contribution was provided directly to me by some other + person who certified (a), (b) or (c) and I have not modified + it. + +(d) I understand and agree that this project and the contribution + are public and that a record of the contribution (including all + personal information I submit with it, including my sign-off) is + maintained indefinitely and may be redistributed consistent with + this project or the open source license(s) involved. +``` + +Then you just add a line to every git commit message: + + Signed-off-by: Joe Smith + +Use your real name (sorry, no pseudonyms or anonymous contributions.) + +If you set your `user.name` and `user.email` git configs, you can sign your +commit automatically with `git commit -s`. diff --git a/vendor/github.com/docker/go-metrics/LICENSE b/vendor/github.com/docker/go-metrics/LICENSE new file mode 100644 index 00000000..8f3fee62 --- /dev/null +++ b/vendor/github.com/docker/go-metrics/LICENSE @@ -0,0 +1,191 @@ + + Apache License + Version 2.0, January 2004 + https://www.apache.org/licenses/ + + TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + + 1. Definitions. + + "License" shall mean the terms and conditions for use, reproduction, + and distribution as defined by Sections 1 through 9 of this document. + + "Licensor" shall mean the copyright owner or entity authorized by + the copyright owner that is granting the License. + + "Legal Entity" shall mean the union of the acting entity and all + other entities that control, are controlled by, or are under common + control with that entity. For the purposes of this definition, + "control" means (i) the power, direct or indirect, to cause the + direction or management of such entity, whether by contract or + otherwise, or (ii) ownership of fifty percent (50%) or more of the + outstanding shares, or (iii) beneficial ownership of such entity. + + "You" (or "Your") shall mean an individual or Legal Entity + exercising permissions granted by this License. + + "Source" form shall mean the preferred form for making modifications, + including but not limited to software source code, documentation + source, and configuration files. + + "Object" form shall mean any form resulting from mechanical + transformation or translation of a Source form, including but + not limited to compiled object code, generated documentation, + and conversions to other media types. + + "Work" shall mean the work of authorship, whether in Source or + Object form, made available under the License, as indicated by a + copyright notice that is included in or attached to the work + (an example is provided in the Appendix below). + + "Derivative Works" shall mean any work, whether in Source or Object + form, that is based on (or derived from) the Work and for which the + editorial revisions, annotations, elaborations, or other modifications + represent, as a whole, an original work of authorship. For the purposes + of this License, Derivative Works shall not include works that remain + separable from, or merely link (or bind by name) to the interfaces of, + the Work and Derivative Works thereof. + + "Contribution" shall mean any work of authorship, including + the original version of the Work and any modifications or additions + to that Work or Derivative Works thereof, that is intentionally + submitted to Licensor for inclusion in the Work by the copyright owner + or by an individual or Legal Entity authorized to submit on behalf of + the copyright owner. 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(https://www.docker.com). + +The following is courtesy of our legal counsel: + + +Use and transfer of Docker may be subject to certain restrictions by the +United States and other governments. +It is your responsibility to ensure that your use and/or transfer does not +violate applicable laws. + +For more information, please see https://www.bis.doc.gov + +See also https://www.apache.org/dev/crypto.html and/or seek legal counsel. diff --git a/vendor/github.com/docker/go-metrics/README.md b/vendor/github.com/docker/go-metrics/README.md new file mode 100644 index 00000000..a9e947cb --- /dev/null +++ b/vendor/github.com/docker/go-metrics/README.md @@ -0,0 +1,91 @@ +# go-metrics [![GoDoc](https://godoc.org/github.com/docker/go-metrics?status.svg)](https://godoc.org/github.com/docker/go-metrics) ![Badge Badge](http://doyouevenbadge.com/github.com/docker/go-metrics) + +This package is small wrapper around the prometheus go client to help enforce convention and best practices for metrics collection in Docker projects. + +## Best Practices + +This packages is meant to be used for collecting metrics in Docker projects. +It is not meant to be used as a replacement for the prometheus client but to help enforce consistent naming across metrics collected. +If you have not already read the prometheus best practices around naming and labels you can read the page [here](https://prometheus.io/docs/practices/naming/). + +The following are a few Docker specific rules that will help you name and work with metrics in your project. + +1. Namespace and Subsystem + +This package provides you with a namespace type that allows you to specify the same namespace and subsystem for your metrics. + +```go +ns := metrics.NewNamespace("engine", "daemon", metrics.Labels{ + "version": dockerversion.Version, + "commit": dockerversion.GitCommit, +}) +``` + +In the example above we are creating metrics for the Docker engine's daemon package. +`engine` would be the namespace in this example where `daemon` is the subsystem or package where we are collecting the metrics. + +A namespace also allows you to attach constant labels to the metrics such as the git commit and version that it is collecting. + +2. Declaring your Metrics + +Try to keep all your metric declarations in one file. +This makes it easy for others to see what constant labels are defined on the namespace and what labels are defined on the metrics when they are created. + +3. Use labels instead of multiple metrics + +Labels allow you to define one metric such as the time it takes to perform a certain action on an object. +If we wanted to collect timings on various container actions such as create, start, and delete then we can define one metric called `container_actions` and use labels to specify the type of action. + + +```go +containerActions = ns.NewLabeledTimer("container_actions", "The number of milliseconds it takes to process each container action", "action") +``` + +The last parameter is the label name or key. +When adding a data point to the metric you will use the `WithValues` function to specify the `action` that you are collecting for. + +```go +containerActions.WithValues("create").UpdateSince(start) +``` + +4. Always use a unit + +The metric name should describe what you are measuring but you also need to provide the unit that it is being measured with. +For a timer, the standard unit is seconds and a counter's standard unit is a total. +For gauges you must provide the unit. +This package provides a standard set of units for use within the Docker projects. + +```go +Nanoseconds Unit = "nanoseconds" +Seconds Unit = "seconds" +Bytes Unit = "bytes" +Total Unit = "total" +``` + +If you need to use a unit but it is not defined in the package please open a PR to add it but first try to see if one of the already created units will work for your metric, i.e. seconds or nanoseconds vs adding milliseconds. + +## Docs + +Package documentation can be found [here](https://godoc.org/github.com/docker/go-metrics). + +## HTTP Metrics + +To instrument a http handler, you can wrap the code like this: + +```go +namespace := metrics.NewNamespace("docker_distribution", "http", metrics.Labels{"handler": "your_http_handler_name"}) +httpMetrics := namespace.NewDefaultHttpMetrics() +metrics.Register(namespace) +instrumentedHandler = metrics.InstrumentHandler(httpMetrics, unInstrumentedHandler) +``` +Note: The `handler` label must be provided when a new namespace is created. + +## Additional Metrics + +Additional metrics are also defined here that are not available in the prometheus client. +If you need a custom metrics and it is generic enough to be used by multiple projects, define it here. + + +## Copyright and license + +Copyright © 2016 Docker, Inc. All rights reserved, except as follows. Code is released under the Apache 2.0 license. The README.md file, and files in the "docs" folder are licensed under the Creative Commons Attribution 4.0 International License under the terms and conditions set forth in the file "LICENSE.docs". You may obtain a duplicate copy of the same license, titled CC-BY-SA-4.0, at http://creativecommons.org/licenses/by/4.0/. diff --git a/vendor/github.com/docker/go-metrics/counter.go b/vendor/github.com/docker/go-metrics/counter.go new file mode 100644 index 00000000..fe36316a --- /dev/null +++ b/vendor/github.com/docker/go-metrics/counter.go @@ -0,0 +1,52 @@ +package metrics + +import "github.com/prometheus/client_golang/prometheus" + +// Counter is a metrics that can only increment its current count +type Counter interface { + // Inc adds Sum(vs) to the counter. Sum(vs) must be positive. + // + // If len(vs) == 0, increments the counter by 1. + Inc(vs ...float64) +} + +// LabeledCounter is counter that must have labels populated before use. +type LabeledCounter interface { + WithValues(vs ...string) Counter +} + +type labeledCounter struct { + pc *prometheus.CounterVec +} + +func (lc *labeledCounter) WithValues(vs ...string) Counter { + return &counter{pc: lc.pc.WithLabelValues(vs...)} +} + +func (lc *labeledCounter) Describe(ch chan<- *prometheus.Desc) { + lc.pc.Describe(ch) +} + +func (lc *labeledCounter) Collect(ch chan<- prometheus.Metric) { + lc.pc.Collect(ch) +} + +type counter struct { + pc prometheus.Counter +} + +func (c *counter) Inc(vs ...float64) { + if len(vs) == 0 { + c.pc.Inc() + } + + c.pc.Add(sumFloat64(vs...)) +} + +func (c *counter) Describe(ch chan<- *prometheus.Desc) { + c.pc.Describe(ch) +} + +func (c *counter) Collect(ch chan<- prometheus.Metric) { + c.pc.Collect(ch) +} diff --git a/vendor/github.com/docker/go-metrics/docs.go b/vendor/github.com/docker/go-metrics/docs.go new file mode 100644 index 00000000..8fbdfc69 --- /dev/null +++ b/vendor/github.com/docker/go-metrics/docs.go @@ -0,0 +1,3 @@ +// This package is small wrapper around the prometheus go client to help enforce convention and best practices for metrics collection in Docker projects. + +package metrics diff --git a/vendor/github.com/docker/go-metrics/gauge.go b/vendor/github.com/docker/go-metrics/gauge.go new file mode 100644 index 00000000..74296e87 --- /dev/null +++ b/vendor/github.com/docker/go-metrics/gauge.go @@ -0,0 +1,72 @@ +package metrics + +import "github.com/prometheus/client_golang/prometheus" + +// Gauge is a metric that allows incrementing and decrementing a value +type Gauge interface { + Inc(...float64) + Dec(...float64) + + // Add adds the provided value to the gauge's current value + Add(float64) + + // Set replaces the gauge's current value with the provided value + Set(float64) +} + +// LabeledGauge describes a gauge the must have values populated before use. +type LabeledGauge interface { + WithValues(labels ...string) Gauge +} + +type labeledGauge struct { + pg *prometheus.GaugeVec +} + +func (lg *labeledGauge) WithValues(labels ...string) Gauge { + return &gauge{pg: lg.pg.WithLabelValues(labels...)} +} + +func (lg *labeledGauge) Describe(c chan<- *prometheus.Desc) { + lg.pg.Describe(c) +} + +func (lg *labeledGauge) Collect(c chan<- prometheus.Metric) { + lg.pg.Collect(c) +} + +type gauge struct { + pg prometheus.Gauge +} + +func (g *gauge) Inc(vs ...float64) { + if len(vs) == 0 { + g.pg.Inc() + } + + g.Add(sumFloat64(vs...)) +} + +func (g *gauge) Dec(vs ...float64) { + if len(vs) == 0 { + g.pg.Dec() + } + + g.Add(-sumFloat64(vs...)) +} + +func (g *gauge) Add(v float64) { + g.pg.Add(v) +} + +func (g *gauge) Set(v float64) { + g.pg.Set(v) +} + +func (g *gauge) Describe(c chan<- *prometheus.Desc) { + g.pg.Describe(c) +} + +func (g *gauge) Collect(c chan<- prometheus.Metric) { + g.pg.Collect(c) +} diff --git a/vendor/github.com/docker/go-metrics/go.mod b/vendor/github.com/docker/go-metrics/go.mod new file mode 100644 index 00000000..7e328f0c --- /dev/null +++ b/vendor/github.com/docker/go-metrics/go.mod @@ -0,0 +1,5 @@ +module github.com/docker/go-metrics + +go 1.11 + +require github.com/prometheus/client_golang v1.1.0 diff --git a/vendor/github.com/docker/go-metrics/go.sum b/vendor/github.com/docker/go-metrics/go.sum new file mode 100644 index 00000000..b8fb9d07 --- /dev/null +++ b/vendor/github.com/docker/go-metrics/go.sum @@ -0,0 +1,67 @@ +github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc= +github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0= +github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q= +github.com/beorn7/perks v1.0.0/go.mod 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v0.0.0-20190801041406-cbf593c0f2f3/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= +golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ= +gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw= +gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0= +gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= diff --git a/vendor/github.com/docker/go-metrics/handler.go b/vendor/github.com/docker/go-metrics/handler.go new file mode 100644 index 00000000..05601e9e --- /dev/null +++ b/vendor/github.com/docker/go-metrics/handler.go @@ -0,0 +1,74 @@ +package metrics + +import ( + "net/http" + + "github.com/prometheus/client_golang/prometheus" + "github.com/prometheus/client_golang/prometheus/promhttp" +) + +// HTTPHandlerOpts describes a set of configurable options of http metrics +type HTTPHandlerOpts struct { + DurationBuckets []float64 + RequestSizeBuckets []float64 + ResponseSizeBuckets []float64 +} + +const ( + InstrumentHandlerResponseSize = iota + InstrumentHandlerRequestSize + InstrumentHandlerDuration + InstrumentHandlerCounter + InstrumentHandlerInFlight +) + +type HTTPMetric struct { + prometheus.Collector + handlerType int +} + +var ( + defaultDurationBuckets = []float64{.005, .01, .025, .05, .1, .25, .5, 1, 2.5, 5, 10, 25, 60} + defaultRequestSizeBuckets = prometheus.ExponentialBuckets(1024, 2, 22) //1K to 4G + defaultResponseSizeBuckets = defaultRequestSizeBuckets +) + +// Handler returns the global http.Handler that provides the prometheus +// metrics format on GET requests. This handler is no longer instrumented. +func Handler() http.Handler { + return promhttp.Handler() +} + +func InstrumentHandler(metrics []*HTTPMetric, handler http.Handler) http.HandlerFunc { + return InstrumentHandlerFunc(metrics, handler.ServeHTTP) +} + +func InstrumentHandlerFunc(metrics []*HTTPMetric, handlerFunc http.HandlerFunc) http.HandlerFunc { + var handler http.Handler + handler = http.HandlerFunc(handlerFunc) + for _, metric := range metrics { + switch metric.handlerType { + case InstrumentHandlerResponseSize: + if collector, ok := metric.Collector.(prometheus.ObserverVec); ok { + handler = promhttp.InstrumentHandlerResponseSize(collector, handler) + } + case InstrumentHandlerRequestSize: + if collector, ok := metric.Collector.(prometheus.ObserverVec); ok { + handler = promhttp.InstrumentHandlerRequestSize(collector, handler) + } + case InstrumentHandlerDuration: + if collector, ok := metric.Collector.(prometheus.ObserverVec); ok { + handler = promhttp.InstrumentHandlerDuration(collector, handler) + } + case InstrumentHandlerCounter: + if collector, ok := metric.Collector.(*prometheus.CounterVec); ok { + handler = promhttp.InstrumentHandlerCounter(collector, handler) + } + case InstrumentHandlerInFlight: + if collector, ok := metric.Collector.(prometheus.Gauge); ok { + handler = promhttp.InstrumentHandlerInFlight(collector, handler) + } + } + } + return handler.ServeHTTP +} diff --git a/vendor/github.com/docker/go-metrics/helpers.go b/vendor/github.com/docker/go-metrics/helpers.go new file mode 100644 index 00000000..68b7f51b --- /dev/null +++ b/vendor/github.com/docker/go-metrics/helpers.go @@ -0,0 +1,10 @@ +package metrics + +func sumFloat64(vs ...float64) float64 { + var sum float64 + for _, v := range vs { + sum += v + } + + return sum +} diff --git a/vendor/github.com/docker/go-metrics/namespace.go b/vendor/github.com/docker/go-metrics/namespace.go new file mode 100644 index 00000000..79831545 --- /dev/null +++ b/vendor/github.com/docker/go-metrics/namespace.go @@ -0,0 +1,315 @@ +package metrics + +import ( + "fmt" + "sync" + + "github.com/prometheus/client_golang/prometheus" +) + +type Labels map[string]string + +// NewNamespace returns a namespaces that is responsible for managing a collection of +// metrics for a particual namespace and subsystem +// +// labels allows const labels to be added to all metrics created in this namespace +// and are commonly used for data like application version and git commit +func NewNamespace(name, subsystem string, labels Labels) *Namespace { + if labels == nil { + labels = make(map[string]string) + } + return &Namespace{ + name: name, + subsystem: subsystem, + labels: labels, + } +} + +// Namespace describes a set of metrics that share a namespace and subsystem. +type Namespace struct { + name string + subsystem string + labels Labels + mu sync.Mutex + metrics []prometheus.Collector +} + +// WithConstLabels returns a namespace with the provided set of labels merged +// with the existing constant labels on the namespace. +// +// Only metrics created with the returned namespace will get the new constant +// labels. The returned namespace must be registered separately. +func (n *Namespace) WithConstLabels(labels Labels) *Namespace { + n.mu.Lock() + ns := &Namespace{ + name: n.name, + subsystem: n.subsystem, + labels: mergeLabels(n.labels, labels), + } + n.mu.Unlock() + return ns +} + +func (n *Namespace) NewCounter(name, help string) Counter { + c := &counter{pc: prometheus.NewCounter(n.newCounterOpts(name, help))} + n.Add(c) + return c +} + +func (n *Namespace) NewLabeledCounter(name, help string, labels ...string) LabeledCounter { + c := &labeledCounter{pc: prometheus.NewCounterVec(n.newCounterOpts(name, help), labels)} + n.Add(c) + return c +} + +func (n *Namespace) newCounterOpts(name, help string) prometheus.CounterOpts { + return prometheus.CounterOpts{ + Namespace: n.name, + Subsystem: n.subsystem, + Name: makeName(name, Total), + Help: help, + ConstLabels: prometheus.Labels(n.labels), + } +} + +func (n *Namespace) NewTimer(name, help string) Timer { + t := &timer{ + m: prometheus.NewHistogram(n.newTimerOpts(name, help)), + } + n.Add(t) + return t +} + +func (n *Namespace) NewLabeledTimer(name, help string, labels ...string) LabeledTimer { + t := &labeledTimer{ + m: prometheus.NewHistogramVec(n.newTimerOpts(name, help), labels), + } + n.Add(t) + return t +} + +func (n *Namespace) newTimerOpts(name, help string) prometheus.HistogramOpts { + return prometheus.HistogramOpts{ + Namespace: n.name, + Subsystem: n.subsystem, + Name: makeName(name, Seconds), + Help: help, + ConstLabels: prometheus.Labels(n.labels), + } +} + +func (n *Namespace) NewGauge(name, help string, unit Unit) Gauge { + g := &gauge{ + pg: prometheus.NewGauge(n.newGaugeOpts(name, help, unit)), + } + n.Add(g) + return g +} + +func (n *Namespace) NewLabeledGauge(name, help string, unit Unit, labels ...string) LabeledGauge { + g := &labeledGauge{ + pg: prometheus.NewGaugeVec(n.newGaugeOpts(name, help, unit), labels), + } + n.Add(g) + return g +} + +func (n *Namespace) newGaugeOpts(name, help string, unit Unit) prometheus.GaugeOpts { + return prometheus.GaugeOpts{ + Namespace: n.name, + Subsystem: n.subsystem, + Name: makeName(name, unit), + Help: help, + ConstLabels: prometheus.Labels(n.labels), + } +} + +func (n *Namespace) Describe(ch chan<- *prometheus.Desc) { + n.mu.Lock() + defer n.mu.Unlock() + + for _, metric := range n.metrics { + metric.Describe(ch) + } +} + +func (n *Namespace) Collect(ch chan<- prometheus.Metric) { + n.mu.Lock() + defer n.mu.Unlock() + + for _, metric := range n.metrics { + metric.Collect(ch) + } +} + +func (n *Namespace) Add(collector prometheus.Collector) { + n.mu.Lock() + n.metrics = append(n.metrics, collector) + n.mu.Unlock() +} + +func (n *Namespace) NewDesc(name, help string, unit Unit, labels ...string) *prometheus.Desc { + name = makeName(name, unit) + namespace := n.name + if n.subsystem != "" { + namespace = fmt.Sprintf("%s_%s", namespace, n.subsystem) + } + name = fmt.Sprintf("%s_%s", namespace, name) + return prometheus.NewDesc(name, help, labels, prometheus.Labels(n.labels)) +} + +// mergeLabels merges two or more labels objects into a single map, favoring +// the later labels. +func mergeLabels(lbs ...Labels) Labels { + merged := make(Labels) + + for _, target := range lbs { + for k, v := range target { + merged[k] = v + } + } + + return merged +} + +func makeName(name string, unit Unit) string { + if unit == "" { + return name + } + + return fmt.Sprintf("%s_%s", name, unit) +} + +func (n *Namespace) NewDefaultHttpMetrics(handlerName string) []*HTTPMetric { + return n.NewHttpMetricsWithOpts(handlerName, HTTPHandlerOpts{ + DurationBuckets: defaultDurationBuckets, + RequestSizeBuckets: defaultResponseSizeBuckets, + ResponseSizeBuckets: defaultResponseSizeBuckets, + }) +} + +func (n *Namespace) NewHttpMetrics(handlerName string, durationBuckets, requestSizeBuckets, responseSizeBuckets []float64) []*HTTPMetric { + return n.NewHttpMetricsWithOpts(handlerName, HTTPHandlerOpts{ + DurationBuckets: durationBuckets, + RequestSizeBuckets: requestSizeBuckets, + ResponseSizeBuckets: responseSizeBuckets, + }) +} + +func (n *Namespace) NewHttpMetricsWithOpts(handlerName string, opts HTTPHandlerOpts) []*HTTPMetric { + var httpMetrics []*HTTPMetric + inFlightMetric := n.NewInFlightGaugeMetric(handlerName) + requestTotalMetric := n.NewRequestTotalMetric(handlerName) + requestDurationMetric := n.NewRequestDurationMetric(handlerName, opts.DurationBuckets) + requestSizeMetric := n.NewRequestSizeMetric(handlerName, opts.RequestSizeBuckets) + responseSizeMetric := n.NewResponseSizeMetric(handlerName, opts.ResponseSizeBuckets) + httpMetrics = append(httpMetrics, inFlightMetric, requestDurationMetric, requestTotalMetric, requestSizeMetric, responseSizeMetric) + return httpMetrics +} + +func (n *Namespace) NewInFlightGaugeMetric(handlerName string) *HTTPMetric { + labels := prometheus.Labels(n.labels) + labels["handler"] = handlerName + metric := prometheus.NewGauge(prometheus.GaugeOpts{ + Namespace: n.name, + Subsystem: n.subsystem, + Name: "in_flight_requests", + Help: "The in-flight HTTP requests", + ConstLabels: prometheus.Labels(labels), + }) + httpMetric := &HTTPMetric{ + Collector: metric, + handlerType: InstrumentHandlerInFlight, + } + n.Add(httpMetric) + return httpMetric +} + +func (n *Namespace) NewRequestTotalMetric(handlerName string) *HTTPMetric { + labels := prometheus.Labels(n.labels) + labels["handler"] = handlerName + metric := prometheus.NewCounterVec( + prometheus.CounterOpts{ + Namespace: n.name, + Subsystem: n.subsystem, + Name: "requests_total", + Help: "Total number of HTTP requests made.", + ConstLabels: prometheus.Labels(labels), + }, + []string{"code", "method"}, + ) + httpMetric := &HTTPMetric{ + Collector: metric, + handlerType: InstrumentHandlerCounter, + } + n.Add(httpMetric) + return httpMetric +} +func (n *Namespace) NewRequestDurationMetric(handlerName string, buckets []float64) *HTTPMetric { + if len(buckets) == 0 { + panic("DurationBuckets must be provided") + } + labels := prometheus.Labels(n.labels) + labels["handler"] = handlerName + opts := prometheus.HistogramOpts{ + Namespace: n.name, + Subsystem: n.subsystem, + Name: "request_duration_seconds", + Help: "The HTTP request latencies in seconds.", + Buckets: buckets, + ConstLabels: prometheus.Labels(labels), + } + metric := prometheus.NewHistogramVec(opts, []string{"method"}) + httpMetric := &HTTPMetric{ + Collector: metric, + handlerType: InstrumentHandlerDuration, + } + n.Add(httpMetric) + return httpMetric +} + +func (n *Namespace) NewRequestSizeMetric(handlerName string, buckets []float64) *HTTPMetric { + if len(buckets) == 0 { + panic("RequestSizeBuckets must be provided") + } + labels := prometheus.Labels(n.labels) + labels["handler"] = handlerName + opts := prometheus.HistogramOpts{ + Namespace: n.name, + Subsystem: n.subsystem, + Name: "request_size_bytes", + Help: "The HTTP request sizes in bytes.", + Buckets: buckets, + ConstLabels: prometheus.Labels(labels), + } + metric := prometheus.NewHistogramVec(opts, []string{}) + httpMetric := &HTTPMetric{ + Collector: metric, + handlerType: InstrumentHandlerRequestSize, + } + n.Add(httpMetric) + return httpMetric +} + +func (n *Namespace) NewResponseSizeMetric(handlerName string, buckets []float64) *HTTPMetric { + if len(buckets) == 0 { + panic("ResponseSizeBuckets must be provided") + } + labels := prometheus.Labels(n.labels) + labels["handler"] = handlerName + opts := prometheus.HistogramOpts{ + Namespace: n.name, + Subsystem: n.subsystem, + Name: "response_size_bytes", + Help: "The HTTP response sizes in bytes.", + Buckets: buckets, + ConstLabels: prometheus.Labels(labels), + } + metrics := prometheus.NewHistogramVec(opts, []string{}) + httpMetric := &HTTPMetric{ + Collector: metrics, + handlerType: InstrumentHandlerResponseSize, + } + n.Add(httpMetric) + return httpMetric +} diff --git a/vendor/github.com/docker/go-metrics/register.go b/vendor/github.com/docker/go-metrics/register.go new file mode 100644 index 00000000..708358df --- /dev/null +++ b/vendor/github.com/docker/go-metrics/register.go @@ -0,0 +1,15 @@ +package metrics + +import "github.com/prometheus/client_golang/prometheus" + +// Register adds all the metrics in the provided namespace to the global +// metrics registry +func Register(n *Namespace) { + prometheus.MustRegister(n) +} + +// Deregister removes all the metrics in the provided namespace from the +// global metrics registry +func Deregister(n *Namespace) { + prometheus.Unregister(n) +} diff --git a/vendor/github.com/docker/go-metrics/timer.go b/vendor/github.com/docker/go-metrics/timer.go new file mode 100644 index 00000000..824c9873 --- /dev/null +++ b/vendor/github.com/docker/go-metrics/timer.go @@ -0,0 +1,85 @@ +package metrics + +import ( + "time" + + "github.com/prometheus/client_golang/prometheus" +) + +// StartTimer begins a timer observation at the callsite. When the target +// operation is completed, the caller should call the return done func(). +func StartTimer(timer Timer) (done func()) { + start := time.Now() + return func() { + timer.Update(time.Since(start)) + } +} + +// Timer is a metric that allows collecting the duration of an action in seconds +type Timer interface { + // Update records an observation, duration, and converts to the target + // units. + Update(duration time.Duration) + + // UpdateSince will add the duration from the provided starting time to the + // timer's summary with the precisions that was used in creation of the timer + UpdateSince(time.Time) +} + +// LabeledTimer is a timer that must have label values populated before use. +type LabeledTimer interface { + WithValues(labels ...string) *labeledTimerObserver +} + +type labeledTimer struct { + m *prometheus.HistogramVec +} + +type labeledTimerObserver struct { + m prometheus.Observer +} + +func (lbo *labeledTimerObserver) Update(duration time.Duration) { + lbo.m.Observe(duration.Seconds()) +} + +func (lbo *labeledTimerObserver) UpdateSince(since time.Time) { + lbo.m.Observe(time.Since(since).Seconds()) +} + +func (lt *labeledTimer) WithValues(labels ...string) *labeledTimerObserver { + return &labeledTimerObserver{m: lt.m.WithLabelValues(labels...)} +} + +func (lt *labeledTimer) Describe(c chan<- *prometheus.Desc) { + lt.m.Describe(c) +} + +func (lt *labeledTimer) Collect(c chan<- prometheus.Metric) { + lt.m.Collect(c) +} + +type timer struct { + m prometheus.Observer +} + +func (t *timer) Update(duration time.Duration) { + t.m.Observe(duration.Seconds()) +} + +func (t *timer) UpdateSince(since time.Time) { + t.m.Observe(time.Since(since).Seconds()) +} + +func (t *timer) Describe(c chan<- *prometheus.Desc) { + c <- t.m.(prometheus.Metric).Desc() +} + +func (t *timer) Collect(c chan<- prometheus.Metric) { + // Are there any observers that don't implement Collector? It is really + // unclear what the point of the upstream change was, but we'll let this + // panic if we get an observer that doesn't implement collector. In this + // case, we should almost always see metricVec objects, so this should + // never panic. + t.m.(prometheus.Collector).Collect(c) +} diff --git a/vendor/github.com/docker/go-metrics/unit.go b/vendor/github.com/docker/go-metrics/unit.go new file mode 100644 index 00000000..c96622f9 --- /dev/null +++ b/vendor/github.com/docker/go-metrics/unit.go @@ -0,0 +1,12 @@ +package metrics + +// Unit represents the type or precision of a metric that is appended to +// the metrics fully qualified name +type Unit string + +const ( + Nanoseconds Unit = "nanoseconds" + Seconds Unit = "seconds" + Bytes Unit = "bytes" + Total Unit = "total" +) diff --git a/vendor/github.com/matttproud/golang_protobuf_extensions/LICENSE b/vendor/github.com/matttproud/golang_protobuf_extensions/LICENSE new file mode 100644 index 00000000..8dada3ed --- /dev/null +++ b/vendor/github.com/matttproud/golang_protobuf_extensions/LICENSE @@ -0,0 +1,201 @@ + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + + TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + + 1. Definitions. + + "License" shall mean the terms and conditions for use, reproduction, + and distribution as defined by Sections 1 through 9 of this document. + + "Licensor" shall mean the copyright owner or entity authorized by + the copyright owner that is granting the License. + + "Legal Entity" shall mean the union of the acting entity and all + other entities that control, are controlled by, or are under common + control with that entity. For the purposes of this definition, + "control" means (i) the power, direct or indirect, to cause the + direction or management of such entity, whether by contract or + otherwise, or (ii) ownership of fifty percent (50%) or more of the + outstanding shares, or (iii) beneficial ownership of such entity. + + "You" (or "Your") shall mean an individual or Legal Entity + exercising permissions granted by this License. + + "Source" form shall mean the preferred form for making modifications, + including but not limited to software source code, documentation + source, and configuration files. + + "Object" form shall mean any form resulting from mechanical + transformation or translation of a Source form, including but + not limited to compiled object code, generated documentation, + and conversions to other media types. + + "Work" shall mean the work of authorship, whether in Source or + Object form, made available under the License, as indicated by a + copyright notice that is included in or attached to the work + (an example is provided in the Appendix below). + + "Derivative Works" shall mean any work, whether in Source or Object + form, that is based on (or derived from) the Work and for which the + editorial revisions, annotations, elaborations, or other modifications + represent, as a whole, an original work of authorship. For the purposes + of this License, Derivative Works shall not include works that remain + separable from, or merely link (or bind by name) to the interfaces of, + the Work and Derivative Works thereof. + + "Contribution" shall mean any work of authorship, including + the original version of the Work and any modifications or additions + to that Work or Derivative Works thereof, that is intentionally + submitted to Licensor for inclusion in the Work by the copyright owner + or by an individual or Legal Entity authorized to submit on behalf of + the copyright owner. For the purposes of this definition, "submitted" + means any form of electronic, verbal, or written communication sent + to the Licensor or its representatives, including but not limited to + communication on electronic mailing lists, source code control systems, + and issue tracking systems that are managed by, or on behalf of, the + Licensor for the purpose of discussing and improving the Work, but + excluding communication that is conspicuously marked or otherwise + designated in writing by the copyright owner as "Not a Contribution." + + "Contributor" shall mean Licensor and any individual or Legal Entity + on behalf of whom a Contribution has been received by Licensor and + subsequently incorporated within the Work. + + 2. Grant of Copyright License. Subject to the terms and conditions of + this License, each Contributor hereby grants to You a perpetual, + worldwide, non-exclusive, no-charge, royalty-free, irrevocable + copyright license to reproduce, prepare Derivative Works of, + publicly display, publicly perform, sublicense, and distribute the + Work and such Derivative Works in Source or Object form. + + 3. Grant of Patent License. Subject to the terms and conditions of + this License, each Contributor hereby grants to You a perpetual, + worldwide, non-exclusive, no-charge, royalty-free, irrevocable + (except as stated in this section) patent license to make, have made, + use, offer to sell, sell, import, and otherwise transfer the Work, + where such license applies only to those patent claims licensable + by such Contributor that are necessarily infringed by their + Contribution(s) alone or by combination of their Contribution(s) + with the Work to which such Contribution(s) was submitted. If You + institute patent litigation against any entity (including a + cross-claim or counterclaim in a lawsuit) alleging that the Work + or a Contribution incorporated within the Work constitutes direct + or contributory patent infringement, then any patent licenses + granted to You under this License for that Work shall terminate + as of the date such litigation is filed. + + 4. Redistribution. You may reproduce and distribute copies of the + Work or Derivative Works thereof in any medium, with or without + modifications, and in Source or Object form, provided that You + meet the following conditions: + + (a) You must give any other recipients of the Work or + Derivative Works a copy of this License; and + + (b) You must cause any modified files to carry prominent notices + stating that You changed the files; and + + (c) You must retain, in the Source form of any Derivative Works + that You distribute, all copyright, patent, trademark, and + attribution notices from the Source form of the Work, + excluding those notices that do not pertain to any part of + the Derivative Works; and + + (d) If the Work includes a "NOTICE" text file as part of its + distribution, then any Derivative Works that You distribute must + include a readable copy of the attribution notices contained + within such NOTICE file, excluding those notices that do not + pertain to any part of the Derivative Works, in at least one + of the following places: within a NOTICE text file distributed + as part of the Derivative Works; within the Source form or + documentation, if provided along with the Derivative Works; or, + within a display generated by the Derivative Works, if and + wherever such third-party notices normally appear. The contents + of the NOTICE file are for informational purposes only and + do not modify the License. You may add Your own attribution + notices within Derivative Works that You distribute, alongside + or as an addendum to the NOTICE text from the Work, provided + that such additional attribution notices cannot be construed + as modifying the License. + + You may add Your own copyright statement to Your modifications and + may provide additional or different license terms and conditions + for use, reproduction, or distribution of Your modifications, or + for any such Derivative Works as a whole, provided Your use, + reproduction, and distribution of the Work otherwise complies with + the conditions stated in this License. + + 5. Submission of Contributions. Unless You explicitly state otherwise, + any Contribution intentionally submitted for inclusion in the Work + by You to the Licensor shall be under the terms and conditions of + this License, without any additional terms or conditions. + Notwithstanding the above, nothing herein shall supersede or modify + the terms of any separate license agreement you may have executed + with Licensor regarding such Contributions. + + 6. Trademarks. This License does not grant permission to use the trade + names, trademarks, service marks, or product names of the Licensor, + except as required for reasonable and customary use in describing the + origin of the Work and reproducing the content of the NOTICE file. + + 7. Disclaimer of Warranty. Unless required by applicable law or + agreed to in writing, Licensor provides the Work (and each + Contributor provides its Contributions) on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or + implied, including, without limitation, any warranties or conditions + of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A + PARTICULAR PURPOSE. You are solely responsible for determining the + appropriateness of using or redistributing the Work and assume any + risks associated with Your exercise of permissions under this License. + + 8. Limitation of Liability. In no event and under no legal theory, + whether in tort (including negligence), contract, or otherwise, + unless required by applicable law (such as deliberate and grossly + negligent acts) or agreed to in writing, shall any Contributor be + liable to You for damages, including any direct, indirect, special, + incidental, or consequential damages of any character arising as a + result of this License or out of the use or inability to use the + Work (including but not limited to damages for loss of goodwill, + work stoppage, computer failure or malfunction, or any and all + other commercial damages or losses), even if such Contributor + has been advised of the possibility of such damages. + + 9. Accepting Warranty or Additional Liability. While redistributing + the Work or Derivative Works thereof, You may choose to offer, + and charge a fee for, acceptance of support, warranty, indemnity, + or other liability obligations and/or rights consistent with this + License. However, in accepting such obligations, You may act only + on Your own behalf and on Your sole responsibility, not on behalf + of any other Contributor, and only if You agree to indemnify, + defend, and hold each Contributor harmless for any liability + incurred by, or claims asserted against, such Contributor by reason + of your accepting any such warranty or additional liability. + + END OF TERMS AND CONDITIONS + + APPENDIX: How to apply the Apache License to your work. + + To apply the Apache License to your work, attach the following + boilerplate notice, with the fields enclosed by brackets "{}" + replaced with your own identifying information. (Don't include + the brackets!) The text should be enclosed in the appropriate + comment syntax for the file format. We also recommend that a + file or class name and description of purpose be included on the + same "printed page" as the copyright notice for easier + identification within third-party archives. + + Copyright {yyyy} {name of copyright owner} + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. diff --git a/vendor/github.com/matttproud/golang_protobuf_extensions/NOTICE b/vendor/github.com/matttproud/golang_protobuf_extensions/NOTICE new file mode 100644 index 00000000..5d8cb5b7 --- /dev/null +++ b/vendor/github.com/matttproud/golang_protobuf_extensions/NOTICE @@ -0,0 +1 @@ +Copyright 2012 Matt T. Proud (matt.proud@gmail.com) diff --git a/vendor/github.com/matttproud/golang_protobuf_extensions/pbutil/.gitignore b/vendor/github.com/matttproud/golang_protobuf_extensions/pbutil/.gitignore new file mode 100644 index 00000000..e16fb946 --- /dev/null +++ b/vendor/github.com/matttproud/golang_protobuf_extensions/pbutil/.gitignore @@ -0,0 +1 @@ +cover.dat diff --git a/vendor/github.com/matttproud/golang_protobuf_extensions/pbutil/Makefile b/vendor/github.com/matttproud/golang_protobuf_extensions/pbutil/Makefile new file mode 100644 index 00000000..81be2143 --- /dev/null +++ b/vendor/github.com/matttproud/golang_protobuf_extensions/pbutil/Makefile @@ -0,0 +1,7 @@ +all: + +cover: + go test -cover -v -coverprofile=cover.dat ./... + go tool cover -func cover.dat + +.PHONY: cover diff --git a/vendor/github.com/matttproud/golang_protobuf_extensions/pbutil/decode.go b/vendor/github.com/matttproud/golang_protobuf_extensions/pbutil/decode.go new file mode 100644 index 00000000..258c0636 --- /dev/null +++ b/vendor/github.com/matttproud/golang_protobuf_extensions/pbutil/decode.go @@ -0,0 +1,75 @@ +// Copyright 2013 Matt T. Proud +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package pbutil + +import ( + "encoding/binary" + "errors" + "io" + + "github.com/golang/protobuf/proto" +) + +var errInvalidVarint = errors.New("invalid varint32 encountered") + +// ReadDelimited decodes a message from the provided length-delimited stream, +// where the length is encoded as 32-bit varint prefix to the message body. +// It returns the total number of bytes read and any applicable error. This is +// roughly equivalent to the companion Java API's +// MessageLite#parseDelimitedFrom. As per the reader contract, this function +// calls r.Read repeatedly as required until exactly one message including its +// prefix is read and decoded (or an error has occurred). The function never +// reads more bytes from the stream than required. The function never returns +// an error if a message has been read and decoded correctly, even if the end +// of the stream has been reached in doing so. In that case, any subsequent +// calls return (0, io.EOF). +func ReadDelimited(r io.Reader, m proto.Message) (n int, err error) { + // Per AbstractParser#parsePartialDelimitedFrom with + // CodedInputStream#readRawVarint32. + var headerBuf [binary.MaxVarintLen32]byte + var bytesRead, varIntBytes int + var messageLength uint64 + for varIntBytes == 0 { // i.e. no varint has been decoded yet. + if bytesRead >= len(headerBuf) { + return bytesRead, errInvalidVarint + } + // We have to read byte by byte here to avoid reading more bytes + // than required. Each read byte is appended to what we have + // read before. + newBytesRead, err := r.Read(headerBuf[bytesRead : bytesRead+1]) + if newBytesRead == 0 { + if err != nil { + return bytesRead, err + } + // A Reader should not return (0, nil), but if it does, + // it should be treated as no-op (according to the + // Reader contract). So let's go on... + continue + } + bytesRead += newBytesRead + // Now present everything read so far to the varint decoder and + // see if a varint can be decoded already. + messageLength, varIntBytes = proto.DecodeVarint(headerBuf[:bytesRead]) + } + + messageBuf := make([]byte, messageLength) + newBytesRead, err := io.ReadFull(r, messageBuf) + bytesRead += newBytesRead + if err != nil { + return bytesRead, err + } + + return bytesRead, proto.Unmarshal(messageBuf, m) +} diff --git a/vendor/github.com/matttproud/golang_protobuf_extensions/pbutil/doc.go b/vendor/github.com/matttproud/golang_protobuf_extensions/pbutil/doc.go new file mode 100644 index 00000000..c318385c --- /dev/null +++ b/vendor/github.com/matttproud/golang_protobuf_extensions/pbutil/doc.go @@ -0,0 +1,16 @@ +// Copyright 2013 Matt T. Proud +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +// Package pbutil provides record length-delimited Protocol Buffer streaming. +package pbutil diff --git a/vendor/github.com/matttproud/golang_protobuf_extensions/pbutil/encode.go b/vendor/github.com/matttproud/golang_protobuf_extensions/pbutil/encode.go new file mode 100644 index 00000000..8fb59ad2 --- /dev/null +++ b/vendor/github.com/matttproud/golang_protobuf_extensions/pbutil/encode.go @@ -0,0 +1,46 @@ +// Copyright 2013 Matt T. Proud +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package pbutil + +import ( + "encoding/binary" + "io" + + "github.com/golang/protobuf/proto" +) + +// WriteDelimited encodes and dumps a message to the provided writer prefixed +// with a 32-bit varint indicating the length of the encoded message, producing +// a length-delimited record stream, which can be used to chain together +// encoded messages of the same type together in a file. It returns the total +// number of bytes written and any applicable error. This is roughly +// equivalent to the companion Java API's MessageLite#writeDelimitedTo. +func WriteDelimited(w io.Writer, m proto.Message) (n int, err error) { + buffer, err := proto.Marshal(m) + if err != nil { + return 0, err + } + + var buf [binary.MaxVarintLen32]byte + encodedLength := binary.PutUvarint(buf[:], uint64(len(buffer))) + + sync, err := w.Write(buf[:encodedLength]) + if err != nil { + return sync, err + } + + n, err = w.Write(buffer) + return n + sync, err +} diff --git a/vendor/github.com/prometheus/client_golang/LICENSE b/vendor/github.com/prometheus/client_golang/LICENSE new file mode 100644 index 00000000..261eeb9e --- /dev/null +++ b/vendor/github.com/prometheus/client_golang/LICENSE @@ -0,0 +1,201 @@ + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + + TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + + 1. Definitions. + + "License" shall mean the terms and conditions for use, reproduction, + and distribution as defined by Sections 1 through 9 of this document. + + "Licensor" shall mean the copyright owner or entity authorized by + the copyright owner that is granting the License. + + "Legal Entity" shall mean the union of the acting entity and all + other entities that control, are controlled by, or are under common + control with that entity. For the purposes of this definition, + "control" means (i) the power, direct or indirect, to cause the + direction or management of such entity, whether by contract or + otherwise, or (ii) ownership of fifty percent (50%) or more of the + outstanding shares, or (iii) beneficial ownership of such entity. + + "You" (or "Your") shall mean an individual or Legal Entity + exercising permissions granted by this License. + + "Source" form shall mean the preferred form for making modifications, + including but not limited to software source code, documentation + source, and configuration files. + + "Object" form shall mean any form resulting from mechanical + transformation or translation of a Source form, including but + not limited to compiled object code, generated documentation, + and conversions to other media types. + + "Work" shall mean the work of authorship, whether in Source or + Object form, made available under the License, as indicated by a + copyright notice that is included in or attached to the work + (an example is provided in the Appendix below). + + "Derivative Works" shall mean any work, whether in Source or Object + form, that is based on (or derived from) the Work and for which the + editorial revisions, annotations, elaborations, or other modifications + represent, as a whole, an original work of authorship. For the purposes + of this License, Derivative Works shall not include works that remain + separable from, or merely link (or bind by name) to the interfaces of, + the Work and Derivative Works thereof. + + "Contribution" shall mean any work of authorship, including + the original version of the Work and any modifications or additions + to that Work or Derivative Works thereof, that is intentionally + submitted to Licensor for inclusion in the Work by the copyright owner + or by an individual or Legal Entity authorized to submit on behalf of + the copyright owner. For the purposes of this definition, "submitted" + means any form of electronic, verbal, or written communication sent + to the Licensor or its representatives, including but not limited to + communication on electronic mailing lists, source code control systems, + and issue tracking systems that are managed by, or on behalf of, the + Licensor for the purpose of discussing and improving the Work, but + excluding communication that is conspicuously marked or otherwise + designated in writing by the copyright owner as "Not a Contribution." + + "Contributor" shall mean Licensor and any individual or Legal Entity + on behalf of whom a Contribution has been received by Licensor and + subsequently incorporated within the Work. + + 2. Grant of Copyright License. Subject to the terms and conditions of + this License, each Contributor hereby grants to You a perpetual, + worldwide, non-exclusive, no-charge, royalty-free, irrevocable + copyright license to reproduce, prepare Derivative Works of, + publicly display, publicly perform, sublicense, and distribute the + Work and such Derivative Works in Source or Object form. + + 3. Grant of Patent License. Subject to the terms and conditions of + this License, each Contributor hereby grants to You a perpetual, + worldwide, non-exclusive, no-charge, royalty-free, irrevocable + (except as stated in this section) patent license to make, have made, + use, offer to sell, sell, import, and otherwise transfer the Work, + where such license applies only to those patent claims licensable + by such Contributor that are necessarily infringed by their + Contribution(s) alone or by combination of their Contribution(s) + with the Work to which such Contribution(s) was submitted. If You + institute patent litigation against any entity (including a + cross-claim or counterclaim in a lawsuit) alleging that the Work + or a Contribution incorporated within the Work constitutes direct + or contributory patent infringement, then any patent licenses + granted to You under this License for that Work shall terminate + as of the date such litigation is filed. + + 4. Redistribution. You may reproduce and distribute copies of the + Work or Derivative Works thereof in any medium, with or without + modifications, and in Source or Object form, provided that You + meet the following conditions: + + (a) You must give any other recipients of the Work or + Derivative Works a copy of this License; and + + (b) You must cause any modified files to carry prominent notices + stating that You changed the files; and + + (c) You must retain, in the Source form of any Derivative Works + that You distribute, all copyright, patent, trademark, and + attribution notices from the Source form of the Work, + excluding those notices that do not pertain to any part of + the Derivative Works; and + + (d) If the Work includes a "NOTICE" text file as part of its + distribution, then any Derivative Works that You distribute must + include a readable copy of the attribution notices contained + within such NOTICE file, excluding those notices that do not + pertain to any part of the Derivative Works, in at least one + of the following places: within a NOTICE text file distributed + as part of the Derivative Works; within the Source form or + documentation, if provided along with the Derivative Works; or, + within a display generated by the Derivative Works, if and + wherever such third-party notices normally appear. The contents + of the NOTICE file are for informational purposes only and + do not modify the License. You may add Your own attribution + notices within Derivative Works that You distribute, alongside + or as an addendum to the NOTICE text from the Work, provided + that such additional attribution notices cannot be construed + as modifying the License. + + You may add Your own copyright statement to Your modifications and + may provide additional or different license terms and conditions + for use, reproduction, or distribution of Your modifications, or + for any such Derivative Works as a whole, provided Your use, + reproduction, and distribution of the Work otherwise complies with + the conditions stated in this License. + + 5. Submission of Contributions. Unless You explicitly state otherwise, + any Contribution intentionally submitted for inclusion in the Work + by You to the Licensor shall be under the terms and conditions of + this License, without any additional terms or conditions. + Notwithstanding the above, nothing herein shall supersede or modify + the terms of any separate license agreement you may have executed + with Licensor regarding such Contributions. + + 6. Trademarks. This License does not grant permission to use the trade + names, trademarks, service marks, or product names of the Licensor, + except as required for reasonable and customary use in describing the + origin of the Work and reproducing the content of the NOTICE file. + + 7. Disclaimer of Warranty. Unless required by applicable law or + agreed to in writing, Licensor provides the Work (and each + Contributor provides its Contributions) on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or + implied, including, without limitation, any warranties or conditions + of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A + PARTICULAR PURPOSE. You are solely responsible for determining the + appropriateness of using or redistributing the Work and assume any + risks associated with Your exercise of permissions under this License. + + 8. Limitation of Liability. In no event and under no legal theory, + whether in tort (including negligence), contract, or otherwise, + unless required by applicable law (such as deliberate and grossly + negligent acts) or agreed to in writing, shall any Contributor be + liable to You for damages, including any direct, indirect, special, + incidental, or consequential damages of any character arising as a + result of this License or out of the use or inability to use the + Work (including but not limited to damages for loss of goodwill, + work stoppage, computer failure or malfunction, or any and all + other commercial damages or losses), even if such Contributor + has been advised of the possibility of such damages. + + 9. Accepting Warranty or Additional Liability. While redistributing + the Work or Derivative Works thereof, You may choose to offer, + and charge a fee for, acceptance of support, warranty, indemnity, + or other liability obligations and/or rights consistent with this + License. However, in accepting such obligations, You may act only + on Your own behalf and on Your sole responsibility, not on behalf + of any other Contributor, and only if You agree to indemnify, + defend, and hold each Contributor harmless for any liability + incurred by, or claims asserted against, such Contributor by reason + of your accepting any such warranty or additional liability. + + END OF TERMS AND CONDITIONS + + APPENDIX: How to apply the Apache License to your work. + + To apply the Apache License to your work, attach the following + boilerplate notice, with the fields enclosed by brackets "[]" + replaced with your own identifying information. (Don't include + the brackets!) The text should be enclosed in the appropriate + comment syntax for the file format. We also recommend that a + file or class name and description of purpose be included on the + same "printed page" as the copyright notice for easier + identification within third-party archives. + + Copyright [yyyy] [name of copyright owner] + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. diff --git a/vendor/github.com/prometheus/client_golang/NOTICE b/vendor/github.com/prometheus/client_golang/NOTICE new file mode 100644 index 00000000..dd878a30 --- /dev/null +++ b/vendor/github.com/prometheus/client_golang/NOTICE @@ -0,0 +1,23 @@ +Prometheus instrumentation library for Go applications +Copyright 2012-2015 The Prometheus Authors + +This product includes software developed at +SoundCloud Ltd. (http://soundcloud.com/). + + +The following components are included in this product: + +perks - a fork of https://github.com/bmizerany/perks +https://github.com/beorn7/perks +Copyright 2013-2015 Blake Mizerany, Björn Rabenstein +See https://github.com/beorn7/perks/blob/master/README.md for license details. + +Go support for Protocol Buffers - Google's data interchange format +http://github.com/golang/protobuf/ +Copyright 2010 The Go Authors +See source code for license details. + +Support for streaming Protocol Buffer messages for the Go language (golang). +https://github.com/matttproud/golang_protobuf_extensions +Copyright 2013 Matt T. Proud +Licensed under the Apache License, Version 2.0 diff --git a/vendor/github.com/prometheus/client_golang/prometheus/.gitignore b/vendor/github.com/prometheus/client_golang/prometheus/.gitignore new file mode 100644 index 00000000..3460f034 --- /dev/null +++ b/vendor/github.com/prometheus/client_golang/prometheus/.gitignore @@ -0,0 +1 @@ +command-line-arguments.test diff --git a/vendor/github.com/prometheus/client_golang/prometheus/README.md b/vendor/github.com/prometheus/client_golang/prometheus/README.md new file mode 100644 index 00000000..44986bff --- /dev/null +++ b/vendor/github.com/prometheus/client_golang/prometheus/README.md @@ -0,0 +1 @@ +See [![go-doc](https://godoc.org/github.com/prometheus/client_golang/prometheus?status.svg)](https://godoc.org/github.com/prometheus/client_golang/prometheus). diff --git a/vendor/github.com/prometheus/client_golang/prometheus/build_info.go b/vendor/github.com/prometheus/client_golang/prometheus/build_info.go new file mode 100644 index 00000000..288f0e85 --- /dev/null +++ b/vendor/github.com/prometheus/client_golang/prometheus/build_info.go @@ -0,0 +1,29 @@ +// Copyright 2019 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +// +build go1.12 + +package prometheus + +import "runtime/debug" + +// readBuildInfo is a wrapper around debug.ReadBuildInfo for Go 1.12+. +func readBuildInfo() (path, version, sum string) { + path, version, sum = "unknown", "unknown", "unknown" + if bi, ok := debug.ReadBuildInfo(); ok { + path = bi.Main.Path + version = bi.Main.Version + sum = bi.Main.Sum + } + return +} diff --git a/vendor/github.com/prometheus/client_golang/prometheus/build_info_pre_1.12.go b/vendor/github.com/prometheus/client_golang/prometheus/build_info_pre_1.12.go new file mode 100644 index 00000000..6609e287 --- /dev/null +++ b/vendor/github.com/prometheus/client_golang/prometheus/build_info_pre_1.12.go @@ -0,0 +1,22 @@ +// Copyright 2019 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +// +build !go1.12 + +package prometheus + +// readBuildInfo is a wrapper around debug.ReadBuildInfo for Go versions before +// 1.12. Remove this whole file once the minimum supported Go version is 1.12. +func readBuildInfo() (path, version, sum string) { + return "unknown", "unknown", "unknown" +} diff --git a/vendor/github.com/prometheus/client_golang/prometheus/collector.go b/vendor/github.com/prometheus/client_golang/prometheus/collector.go new file mode 100644 index 00000000..1e839650 --- /dev/null +++ b/vendor/github.com/prometheus/client_golang/prometheus/collector.go @@ -0,0 +1,120 @@ +// Copyright 2014 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package prometheus + +// Collector is the interface implemented by anything that can be used by +// Prometheus to collect metrics. A Collector has to be registered for +// collection. See Registerer.Register. +// +// The stock metrics provided by this package (Gauge, Counter, Summary, +// Histogram, Untyped) are also Collectors (which only ever collect one metric, +// namely itself). An implementer of Collector may, however, collect multiple +// metrics in a coordinated fashion and/or create metrics on the fly. Examples +// for collectors already implemented in this library are the metric vectors +// (i.e. collection of multiple instances of the same Metric but with different +// label values) like GaugeVec or SummaryVec, and the ExpvarCollector. +type Collector interface { + // Describe sends the super-set of all possible descriptors of metrics + // collected by this Collector to the provided channel and returns once + // the last descriptor has been sent. The sent descriptors fulfill the + // consistency and uniqueness requirements described in the Desc + // documentation. + // + // It is valid if one and the same Collector sends duplicate + // descriptors. Those duplicates are simply ignored. However, two + // different Collectors must not send duplicate descriptors. + // + // Sending no descriptor at all marks the Collector as “unchecked”, + // i.e. no checks will be performed at registration time, and the + // Collector may yield any Metric it sees fit in its Collect method. + // + // This method idempotently sends the same descriptors throughout the + // lifetime of the Collector. It may be called concurrently and + // therefore must be implemented in a concurrency safe way. + // + // If a Collector encounters an error while executing this method, it + // must send an invalid descriptor (created with NewInvalidDesc) to + // signal the error to the registry. + Describe(chan<- *Desc) + // Collect is called by the Prometheus registry when collecting + // metrics. The implementation sends each collected metric via the + // provided channel and returns once the last metric has been sent. The + // descriptor of each sent metric is one of those returned by Describe + // (unless the Collector is unchecked, see above). Returned metrics that + // share the same descriptor must differ in their variable label + // values. + // + // This method may be called concurrently and must therefore be + // implemented in a concurrency safe way. Blocking occurs at the expense + // of total performance of rendering all registered metrics. Ideally, + // Collector implementations support concurrent readers. + Collect(chan<- Metric) +} + +// DescribeByCollect is a helper to implement the Describe method of a custom +// Collector. It collects the metrics from the provided Collector and sends +// their descriptors to the provided channel. +// +// If a Collector collects the same metrics throughout its lifetime, its +// Describe method can simply be implemented as: +// +// func (c customCollector) Describe(ch chan<- *Desc) { +// DescribeByCollect(c, ch) +// } +// +// However, this will not work if the metrics collected change dynamically over +// the lifetime of the Collector in a way that their combined set of descriptors +// changes as well. The shortcut implementation will then violate the contract +// of the Describe method. If a Collector sometimes collects no metrics at all +// (for example vectors like CounterVec, GaugeVec, etc., which only collect +// metrics after a metric with a fully specified label set has been accessed), +// it might even get registered as an unchecked Collector (cf. the Register +// method of the Registerer interface). Hence, only use this shortcut +// implementation of Describe if you are certain to fulfill the contract. +// +// The Collector example demonstrates a use of DescribeByCollect. +func DescribeByCollect(c Collector, descs chan<- *Desc) { + metrics := make(chan Metric) + go func() { + c.Collect(metrics) + close(metrics) + }() + for m := range metrics { + descs <- m.Desc() + } +} + +// selfCollector implements Collector for a single Metric so that the Metric +// collects itself. Add it as an anonymous field to a struct that implements +// Metric, and call init with the Metric itself as an argument. +type selfCollector struct { + self Metric +} + +// init provides the selfCollector with a reference to the metric it is supposed +// to collect. It is usually called within the factory function to create a +// metric. See example. +func (c *selfCollector) init(self Metric) { + c.self = self +} + +// Describe implements Collector. +func (c *selfCollector) Describe(ch chan<- *Desc) { + ch <- c.self.Desc() +} + +// Collect implements Collector. +func (c *selfCollector) Collect(ch chan<- Metric) { + ch <- c.self +} diff --git a/vendor/github.com/prometheus/client_golang/prometheus/counter.go b/vendor/github.com/prometheus/client_golang/prometheus/counter.go new file mode 100644 index 00000000..0e1b48c0 --- /dev/null +++ b/vendor/github.com/prometheus/client_golang/prometheus/counter.go @@ -0,0 +1,321 @@ +// Copyright 2014 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package prometheus + +import ( + "errors" + "math" + "sync/atomic" + "time" + + dto "github.com/prometheus/client_model/go" +) + +// Counter is a Metric that represents a single numerical value that only ever +// goes up. That implies that it cannot be used to count items whose number can +// also go down, e.g. the number of currently running goroutines. Those +// "counters" are represented by Gauges. +// +// A Counter is typically used to count requests served, tasks completed, errors +// occurred, etc. +// +// To create Counter instances, use NewCounter. +type Counter interface { + Metric + Collector + + // Inc increments the counter by 1. Use Add to increment it by arbitrary + // non-negative values. + Inc() + // Add adds the given value to the counter. It panics if the value is < + // 0. + Add(float64) +} + +// ExemplarAdder is implemented by Counters that offer the option of adding a +// value to the Counter together with an exemplar. Its AddWithExemplar method +// works like the Add method of the Counter interface but also replaces the +// currently saved exemplar (if any) with a new one, created from the provided +// value, the current time as timestamp, and the provided labels. Empty Labels +// will lead to a valid (label-less) exemplar. But if Labels is nil, the current +// exemplar is left in place. AddWithExemplar panics if the value is < 0, if any +// of the provided labels are invalid, or if the provided labels contain more +// than 64 runes in total. +type ExemplarAdder interface { + AddWithExemplar(value float64, exemplar Labels) +} + +// CounterOpts is an alias for Opts. See there for doc comments. +type CounterOpts Opts + +// NewCounter creates a new Counter based on the provided CounterOpts. +// +// The returned implementation also implements ExemplarAdder. It is safe to +// perform the corresponding type assertion. +// +// The returned implementation tracks the counter value in two separate +// variables, a float64 and a uint64. The latter is used to track calls of the +// Inc method and calls of the Add method with a value that can be represented +// as a uint64. This allows atomic increments of the counter with optimal +// performance. (It is common to have an Inc call in very hot execution paths.) +// Both internal tracking values are added up in the Write method. This has to +// be taken into account when it comes to precision and overflow behavior. +func NewCounter(opts CounterOpts) Counter { + desc := NewDesc( + BuildFQName(opts.Namespace, opts.Subsystem, opts.Name), + opts.Help, + nil, + opts.ConstLabels, + ) + result := &counter{desc: desc, labelPairs: desc.constLabelPairs, now: time.Now} + result.init(result) // Init self-collection. + return result +} + +type counter struct { + // valBits contains the bits of the represented float64 value, while + // valInt stores values that are exact integers. Both have to go first + // in the struct to guarantee alignment for atomic operations. + // http://golang.org/pkg/sync/atomic/#pkg-note-BUG + valBits uint64 + valInt uint64 + + selfCollector + desc *Desc + + labelPairs []*dto.LabelPair + exemplar atomic.Value // Containing nil or a *dto.Exemplar. + + now func() time.Time // To mock out time.Now() for testing. +} + +func (c *counter) Desc() *Desc { + return c.desc +} + +func (c *counter) Add(v float64) { + if v < 0 { + panic(errors.New("counter cannot decrease in value")) + } + + ival := uint64(v) + if float64(ival) == v { + atomic.AddUint64(&c.valInt, ival) + return + } + + for { + oldBits := atomic.LoadUint64(&c.valBits) + newBits := math.Float64bits(math.Float64frombits(oldBits) + v) + if atomic.CompareAndSwapUint64(&c.valBits, oldBits, newBits) { + return + } + } +} + +func (c *counter) AddWithExemplar(v float64, e Labels) { + c.Add(v) + c.updateExemplar(v, e) +} + +func (c *counter) Inc() { + atomic.AddUint64(&c.valInt, 1) +} + +func (c *counter) Write(out *dto.Metric) error { + fval := math.Float64frombits(atomic.LoadUint64(&c.valBits)) + ival := atomic.LoadUint64(&c.valInt) + val := fval + float64(ival) + + var exemplar *dto.Exemplar + if e := c.exemplar.Load(); e != nil { + exemplar = e.(*dto.Exemplar) + } + + return populateMetric(CounterValue, val, c.labelPairs, exemplar, out) +} + +func (c *counter) updateExemplar(v float64, l Labels) { + if l == nil { + return + } + e, err := newExemplar(v, c.now(), l) + if err != nil { + panic(err) + } + c.exemplar.Store(e) +} + +// CounterVec is a Collector that bundles a set of Counters that all share the +// same Desc, but have different values for their variable labels. This is used +// if you want to count the same thing partitioned by various dimensions +// (e.g. number of HTTP requests, partitioned by response code and +// method). Create instances with NewCounterVec. +type CounterVec struct { + *metricVec +} + +// NewCounterVec creates a new CounterVec based on the provided CounterOpts and +// partitioned by the given label names. +func NewCounterVec(opts CounterOpts, labelNames []string) *CounterVec { + desc := NewDesc( + BuildFQName(opts.Namespace, opts.Subsystem, opts.Name), + opts.Help, + labelNames, + opts.ConstLabels, + ) + return &CounterVec{ + metricVec: newMetricVec(desc, func(lvs ...string) Metric { + if len(lvs) != len(desc.variableLabels) { + panic(makeInconsistentCardinalityError(desc.fqName, desc.variableLabels, lvs)) + } + result := &counter{desc: desc, labelPairs: makeLabelPairs(desc, lvs), now: time.Now} + result.init(result) // Init self-collection. + return result + }), + } +} + +// GetMetricWithLabelValues returns the Counter for the given slice of label +// values (same order as the VariableLabels in Desc). If that combination of +// label values is accessed for the first time, a new Counter is created. +// +// It is possible to call this method without using the returned Counter to only +// create the new Counter but leave it at its starting value 0. See also the +// SummaryVec example. +// +// Keeping the Counter for later use is possible (and should be considered if +// performance is critical), but keep in mind that Reset, DeleteLabelValues and +// Delete can be used to delete the Counter from the CounterVec. In that case, +// the Counter will still exist, but it will not be exported anymore, even if a +// Counter with the same label values is created later. +// +// An error is returned if the number of label values is not the same as the +// number of VariableLabels in Desc (minus any curried labels). +// +// Note that for more than one label value, this method is prone to mistakes +// caused by an incorrect order of arguments. Consider GetMetricWith(Labels) as +// an alternative to avoid that type of mistake. For higher label numbers, the +// latter has a much more readable (albeit more verbose) syntax, but it comes +// with a performance overhead (for creating and processing the Labels map). +// See also the GaugeVec example. +func (v *CounterVec) GetMetricWithLabelValues(lvs ...string) (Counter, error) { + metric, err := v.metricVec.getMetricWithLabelValues(lvs...) + if metric != nil { + return metric.(Counter), err + } + return nil, err +} + +// GetMetricWith returns the Counter for the given Labels map (the label names +// must match those of the VariableLabels in Desc). If that label map is +// accessed for the first time, a new Counter is created. Implications of +// creating a Counter without using it and keeping the Counter for later use are +// the same as for GetMetricWithLabelValues. +// +// An error is returned if the number and names of the Labels are inconsistent +// with those of the VariableLabels in Desc (minus any curried labels). +// +// This method is used for the same purpose as +// GetMetricWithLabelValues(...string). See there for pros and cons of the two +// methods. +func (v *CounterVec) GetMetricWith(labels Labels) (Counter, error) { + metric, err := v.metricVec.getMetricWith(labels) + if metric != nil { + return metric.(Counter), err + } + return nil, err +} + +// WithLabelValues works as GetMetricWithLabelValues, but panics where +// GetMetricWithLabelValues would have returned an error. Not returning an +// error allows shortcuts like +// myVec.WithLabelValues("404", "GET").Add(42) +func (v *CounterVec) WithLabelValues(lvs ...string) Counter { + c, err := v.GetMetricWithLabelValues(lvs...) + if err != nil { + panic(err) + } + return c +} + +// With works as GetMetricWith, but panics where GetMetricWithLabels would have +// returned an error. Not returning an error allows shortcuts like +// myVec.With(prometheus.Labels{"code": "404", "method": "GET"}).Add(42) +func (v *CounterVec) With(labels Labels) Counter { + c, err := v.GetMetricWith(labels) + if err != nil { + panic(err) + } + return c +} + +// CurryWith returns a vector curried with the provided labels, i.e. the +// returned vector has those labels pre-set for all labeled operations performed +// on it. The cardinality of the curried vector is reduced accordingly. The +// order of the remaining labels stays the same (just with the curried labels +// taken out of the sequence – which is relevant for the +// (GetMetric)WithLabelValues methods). It is possible to curry a curried +// vector, but only with labels not yet used for currying before. +// +// The metrics contained in the CounterVec are shared between the curried and +// uncurried vectors. They are just accessed differently. Curried and uncurried +// vectors behave identically in terms of collection. Only one must be +// registered with a given registry (usually the uncurried version). The Reset +// method deletes all metrics, even if called on a curried vector. +func (v *CounterVec) CurryWith(labels Labels) (*CounterVec, error) { + vec, err := v.curryWith(labels) + if vec != nil { + return &CounterVec{vec}, err + } + return nil, err +} + +// MustCurryWith works as CurryWith but panics where CurryWith would have +// returned an error. +func (v *CounterVec) MustCurryWith(labels Labels) *CounterVec { + vec, err := v.CurryWith(labels) + if err != nil { + panic(err) + } + return vec +} + +// CounterFunc is a Counter whose value is determined at collect time by calling a +// provided function. +// +// To create CounterFunc instances, use NewCounterFunc. +type CounterFunc interface { + Metric + Collector +} + +// NewCounterFunc creates a new CounterFunc based on the provided +// CounterOpts. The value reported is determined by calling the given function +// from within the Write method. Take into account that metric collection may +// happen concurrently. If that results in concurrent calls to Write, like in +// the case where a CounterFunc is directly registered with Prometheus, the +// provided function must be concurrency-safe. The function should also honor +// the contract for a Counter (values only go up, not down), but compliance will +// not be checked. +// +// Check out the ExampleGaugeFunc examples for the similar GaugeFunc. +func NewCounterFunc(opts CounterOpts, function func() float64) CounterFunc { + return newValueFunc(NewDesc( + BuildFQName(opts.Namespace, opts.Subsystem, opts.Name), + opts.Help, + nil, + opts.ConstLabels, + ), CounterValue, function) +} diff --git a/vendor/github.com/prometheus/client_golang/prometheus/desc.go b/vendor/github.com/prometheus/client_golang/prometheus/desc.go new file mode 100644 index 00000000..2f19f5e1 --- /dev/null +++ b/vendor/github.com/prometheus/client_golang/prometheus/desc.go @@ -0,0 +1,186 @@ +// Copyright 2016 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package prometheus + +import ( + "errors" + "fmt" + "sort" + "strings" + + "github.com/cespare/xxhash/v2" + //lint:ignore SA1019 Need to keep deprecated package for compatibility. + "github.com/golang/protobuf/proto" + "github.com/prometheus/common/model" + + dto "github.com/prometheus/client_model/go" +) + +// Desc is the descriptor used by every Prometheus Metric. It is essentially +// the immutable meta-data of a Metric. The normal Metric implementations +// included in this package manage their Desc under the hood. Users only have to +// deal with Desc if they use advanced features like the ExpvarCollector or +// custom Collectors and Metrics. +// +// Descriptors registered with the same registry have to fulfill certain +// consistency and uniqueness criteria if they share the same fully-qualified +// name: They must have the same help string and the same label names (aka label +// dimensions) in each, constLabels and variableLabels, but they must differ in +// the values of the constLabels. +// +// Descriptors that share the same fully-qualified names and the same label +// values of their constLabels are considered equal. +// +// Use NewDesc to create new Desc instances. +type Desc struct { + // fqName has been built from Namespace, Subsystem, and Name. + fqName string + // help provides some helpful information about this metric. + help string + // constLabelPairs contains precalculated DTO label pairs based on + // the constant labels. + constLabelPairs []*dto.LabelPair + // VariableLabels contains names of labels for which the metric + // maintains variable values. + variableLabels []string + // id is a hash of the values of the ConstLabels and fqName. This + // must be unique among all registered descriptors and can therefore be + // used as an identifier of the descriptor. + id uint64 + // dimHash is a hash of the label names (preset and variable) and the + // Help string. Each Desc with the same fqName must have the same + // dimHash. + dimHash uint64 + // err is an error that occurred during construction. It is reported on + // registration time. + err error +} + +// NewDesc allocates and initializes a new Desc. Errors are recorded in the Desc +// and will be reported on registration time. variableLabels and constLabels can +// be nil if no such labels should be set. fqName must not be empty. +// +// variableLabels only contain the label names. Their label values are variable +// and therefore not part of the Desc. (They are managed within the Metric.) +// +// For constLabels, the label values are constant. Therefore, they are fully +// specified in the Desc. See the Collector example for a usage pattern. +func NewDesc(fqName, help string, variableLabels []string, constLabels Labels) *Desc { + d := &Desc{ + fqName: fqName, + help: help, + variableLabels: variableLabels, + } + if !model.IsValidMetricName(model.LabelValue(fqName)) { + d.err = fmt.Errorf("%q is not a valid metric name", fqName) + return d + } + // labelValues contains the label values of const labels (in order of + // their sorted label names) plus the fqName (at position 0). + labelValues := make([]string, 1, len(constLabels)+1) + labelValues[0] = fqName + labelNames := make([]string, 0, len(constLabels)+len(variableLabels)) + labelNameSet := map[string]struct{}{} + // First add only the const label names and sort them... + for labelName := range constLabels { + if !checkLabelName(labelName) { + d.err = fmt.Errorf("%q is not a valid label name for metric %q", labelName, fqName) + return d + } + labelNames = append(labelNames, labelName) + labelNameSet[labelName] = struct{}{} + } + sort.Strings(labelNames) + // ... so that we can now add const label values in the order of their names. + for _, labelName := range labelNames { + labelValues = append(labelValues, constLabels[labelName]) + } + // Validate the const label values. They can't have a wrong cardinality, so + // use in len(labelValues) as expectedNumberOfValues. + if err := validateLabelValues(labelValues, len(labelValues)); err != nil { + d.err = err + return d + } + // Now add the variable label names, but prefix them with something that + // cannot be in a regular label name. That prevents matching the label + // dimension with a different mix between preset and variable labels. + for _, labelName := range variableLabels { + if !checkLabelName(labelName) { + d.err = fmt.Errorf("%q is not a valid label name for metric %q", labelName, fqName) + return d + } + labelNames = append(labelNames, "$"+labelName) + labelNameSet[labelName] = struct{}{} + } + if len(labelNames) != len(labelNameSet) { + d.err = errors.New("duplicate label names") + return d + } + + xxh := xxhash.New() + for _, val := range labelValues { + xxh.WriteString(val) + xxh.Write(separatorByteSlice) + } + d.id = xxh.Sum64() + // Sort labelNames so that order doesn't matter for the hash. + sort.Strings(labelNames) + // Now hash together (in this order) the help string and the sorted + // label names. + xxh.Reset() + xxh.WriteString(help) + xxh.Write(separatorByteSlice) + for _, labelName := range labelNames { + xxh.WriteString(labelName) + xxh.Write(separatorByteSlice) + } + d.dimHash = xxh.Sum64() + + d.constLabelPairs = make([]*dto.LabelPair, 0, len(constLabels)) + for n, v := range constLabels { + d.constLabelPairs = append(d.constLabelPairs, &dto.LabelPair{ + Name: proto.String(n), + Value: proto.String(v), + }) + } + sort.Sort(labelPairSorter(d.constLabelPairs)) + return d +} + +// NewInvalidDesc returns an invalid descriptor, i.e. a descriptor with the +// provided error set. If a collector returning such a descriptor is registered, +// registration will fail with the provided error. NewInvalidDesc can be used by +// a Collector to signal inability to describe itself. +func NewInvalidDesc(err error) *Desc { + return &Desc{ + err: err, + } +} + +func (d *Desc) String() string { + lpStrings := make([]string, 0, len(d.constLabelPairs)) + for _, lp := range d.constLabelPairs { + lpStrings = append( + lpStrings, + fmt.Sprintf("%s=%q", lp.GetName(), lp.GetValue()), + ) + } + return fmt.Sprintf( + "Desc{fqName: %q, help: %q, constLabels: {%s}, variableLabels: %v}", + d.fqName, + d.help, + strings.Join(lpStrings, ","), + d.variableLabels, + ) +} diff --git a/vendor/github.com/prometheus/client_golang/prometheus/doc.go b/vendor/github.com/prometheus/client_golang/prometheus/doc.go new file mode 100644 index 00000000..98450125 --- /dev/null +++ b/vendor/github.com/prometheus/client_golang/prometheus/doc.go @@ -0,0 +1,199 @@ +// Copyright 2014 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +// Package prometheus is the core instrumentation package. It provides metrics +// primitives to instrument code for monitoring. It also offers a registry for +// metrics. Sub-packages allow to expose the registered metrics via HTTP +// (package promhttp) or push them to a Pushgateway (package push). There is +// also a sub-package promauto, which provides metrics constructors with +// automatic registration. +// +// All exported functions and methods are safe to be used concurrently unless +// specified otherwise. +// +// A Basic Example +// +// As a starting point, a very basic usage example: +// +// package main +// +// import ( +// "log" +// "net/http" +// +// "github.com/prometheus/client_golang/prometheus" +// "github.com/prometheus/client_golang/prometheus/promhttp" +// ) +// +// var ( +// cpuTemp = prometheus.NewGauge(prometheus.GaugeOpts{ +// Name: "cpu_temperature_celsius", +// Help: "Current temperature of the CPU.", +// }) +// hdFailures = prometheus.NewCounterVec( +// prometheus.CounterOpts{ +// Name: "hd_errors_total", +// Help: "Number of hard-disk errors.", +// }, +// []string{"device"}, +// ) +// ) +// +// func init() { +// // Metrics have to be registered to be exposed: +// prometheus.MustRegister(cpuTemp) +// prometheus.MustRegister(hdFailures) +// } +// +// func main() { +// cpuTemp.Set(65.3) +// hdFailures.With(prometheus.Labels{"device":"/dev/sda"}).Inc() +// +// // The Handler function provides a default handler to expose metrics +// // via an HTTP server. "/metrics" is the usual endpoint for that. +// http.Handle("/metrics", promhttp.Handler()) +// log.Fatal(http.ListenAndServe(":8080", nil)) +// } +// +// +// This is a complete program that exports two metrics, a Gauge and a Counter, +// the latter with a label attached to turn it into a (one-dimensional) vector. +// +// Metrics +// +// The number of exported identifiers in this package might appear a bit +// overwhelming. However, in addition to the basic plumbing shown in the example +// above, you only need to understand the different metric types and their +// vector versions for basic usage. Furthermore, if you are not concerned with +// fine-grained control of when and how to register metrics with the registry, +// have a look at the promauto package, which will effectively allow you to +// ignore registration altogether in simple cases. +// +// Above, you have already touched the Counter and the Gauge. There are two more +// advanced metric types: the Summary and Histogram. A more thorough description +// of those four metric types can be found in the Prometheus docs: +// https://prometheus.io/docs/concepts/metric_types/ +// +// In addition to the fundamental metric types Gauge, Counter, Summary, and +// Histogram, a very important part of the Prometheus data model is the +// partitioning of samples along dimensions called labels, which results in +// metric vectors. The fundamental types are GaugeVec, CounterVec, SummaryVec, +// and HistogramVec. +// +// While only the fundamental metric types implement the Metric interface, both +// the metrics and their vector versions implement the Collector interface. A +// Collector manages the collection of a number of Metrics, but for convenience, +// a Metric can also “collect itself”. Note that Gauge, Counter, Summary, and +// Histogram are interfaces themselves while GaugeVec, CounterVec, SummaryVec, +// and HistogramVec are not. +// +// To create instances of Metrics and their vector versions, you need a suitable +// …Opts struct, i.e. GaugeOpts, CounterOpts, SummaryOpts, or HistogramOpts. +// +// Custom Collectors and constant Metrics +// +// While you could create your own implementations of Metric, most likely you +// will only ever implement the Collector interface on your own. At a first +// glance, a custom Collector seems handy to bundle Metrics for common +// registration (with the prime example of the different metric vectors above, +// which bundle all the metrics of the same name but with different labels). +// +// There is a more involved use case, too: If you already have metrics +// available, created outside of the Prometheus context, you don't need the +// interface of the various Metric types. You essentially want to mirror the +// existing numbers into Prometheus Metrics during collection. An own +// implementation of the Collector interface is perfect for that. You can create +// Metric instances “on the fly” using NewConstMetric, NewConstHistogram, and +// NewConstSummary (and their respective Must… versions). NewConstMetric is used +// for all metric types with just a float64 as their value: Counter, Gauge, and +// a special “type” called Untyped. Use the latter if you are not sure if the +// mirrored metric is a Counter or a Gauge. Creation of the Metric instance +// happens in the Collect method. The Describe method has to return separate +// Desc instances, representative of the “throw-away” metrics to be created +// later. NewDesc comes in handy to create those Desc instances. Alternatively, +// you could return no Desc at all, which will mark the Collector “unchecked”. +// No checks are performed at registration time, but metric consistency will +// still be ensured at scrape time, i.e. any inconsistencies will lead to scrape +// errors. Thus, with unchecked Collectors, the responsibility to not collect +// metrics that lead to inconsistencies in the total scrape result lies with the +// implementer of the Collector. While this is not a desirable state, it is +// sometimes necessary. The typical use case is a situation where the exact +// metrics to be returned by a Collector cannot be predicted at registration +// time, but the implementer has sufficient knowledge of the whole system to +// guarantee metric consistency. +// +// The Collector example illustrates the use case. You can also look at the +// source code of the processCollector (mirroring process metrics), the +// goCollector (mirroring Go metrics), or the expvarCollector (mirroring expvar +// metrics) as examples that are used in this package itself. +// +// If you just need to call a function to get a single float value to collect as +// a metric, GaugeFunc, CounterFunc, or UntypedFunc might be interesting +// shortcuts. +// +// Advanced Uses of the Registry +// +// While MustRegister is the by far most common way of registering a Collector, +// sometimes you might want to handle the errors the registration might cause. +// As suggested by the name, MustRegister panics if an error occurs. With the +// Register function, the error is returned and can be handled. +// +// An error is returned if the registered Collector is incompatible or +// inconsistent with already registered metrics. The registry aims for +// consistency of the collected metrics according to the Prometheus data model. +// Inconsistencies are ideally detected at registration time, not at collect +// time. The former will usually be detected at start-up time of a program, +// while the latter will only happen at scrape time, possibly not even on the +// first scrape if the inconsistency only becomes relevant later. That is the +// main reason why a Collector and a Metric have to describe themselves to the +// registry. +// +// So far, everything we did operated on the so-called default registry, as it +// can be found in the global DefaultRegisterer variable. With NewRegistry, you +// can create a custom registry, or you can even implement the Registerer or +// Gatherer interfaces yourself. The methods Register and Unregister work in the +// same way on a custom registry as the global functions Register and Unregister +// on the default registry. +// +// There are a number of uses for custom registries: You can use registries with +// special properties, see NewPedanticRegistry. You can avoid global state, as +// it is imposed by the DefaultRegisterer. You can use multiple registries at +// the same time to expose different metrics in different ways. You can use +// separate registries for testing purposes. +// +// Also note that the DefaultRegisterer comes registered with a Collector for Go +// runtime metrics (via NewGoCollector) and a Collector for process metrics (via +// NewProcessCollector). With a custom registry, you are in control and decide +// yourself about the Collectors to register. +// +// HTTP Exposition +// +// The Registry implements the Gatherer interface. The caller of the Gather +// method can then expose the gathered metrics in some way. Usually, the metrics +// are served via HTTP on the /metrics endpoint. That's happening in the example +// above. The tools to expose metrics via HTTP are in the promhttp sub-package. +// +// Pushing to the Pushgateway +// +// Function for pushing to the Pushgateway can be found in the push sub-package. +// +// Graphite Bridge +// +// Functions and examples to push metrics from a Gatherer to Graphite can be +// found in the graphite sub-package. +// +// Other Means of Exposition +// +// More ways of exposing metrics can easily be added by following the approaches +// of the existing implementations. +package prometheus diff --git a/vendor/github.com/prometheus/client_golang/prometheus/expvar_collector.go b/vendor/github.com/prometheus/client_golang/prometheus/expvar_collector.go new file mode 100644 index 00000000..18a99d5f --- /dev/null +++ b/vendor/github.com/prometheus/client_golang/prometheus/expvar_collector.go @@ -0,0 +1,119 @@ +// Copyright 2014 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package prometheus + +import ( + "encoding/json" + "expvar" +) + +type expvarCollector struct { + exports map[string]*Desc +} + +// NewExpvarCollector returns a newly allocated expvar Collector that still has +// to be registered with a Prometheus registry. +// +// An expvar Collector collects metrics from the expvar interface. It provides a +// quick way to expose numeric values that are already exported via expvar as +// Prometheus metrics. Note that the data models of expvar and Prometheus are +// fundamentally different, and that the expvar Collector is inherently slower +// than native Prometheus metrics. Thus, the expvar Collector is probably great +// for experiments and prototying, but you should seriously consider a more +// direct implementation of Prometheus metrics for monitoring production +// systems. +// +// The exports map has the following meaning: +// +// The keys in the map correspond to expvar keys, i.e. for every expvar key you +// want to export as Prometheus metric, you need an entry in the exports +// map. The descriptor mapped to each key describes how to export the expvar +// value. It defines the name and the help string of the Prometheus metric +// proxying the expvar value. The type will always be Untyped. +// +// For descriptors without variable labels, the expvar value must be a number or +// a bool. The number is then directly exported as the Prometheus sample +// value. (For a bool, 'false' translates to 0 and 'true' to 1). Expvar values +// that are not numbers or bools are silently ignored. +// +// If the descriptor has one variable label, the expvar value must be an expvar +// map. The keys in the expvar map become the various values of the one +// Prometheus label. The values in the expvar map must be numbers or bools again +// as above. +// +// For descriptors with more than one variable label, the expvar must be a +// nested expvar map, i.e. where the values of the topmost map are maps again +// etc. until a depth is reached that corresponds to the number of labels. The +// leaves of that structure must be numbers or bools as above to serve as the +// sample values. +// +// Anything that does not fit into the scheme above is silently ignored. +func NewExpvarCollector(exports map[string]*Desc) Collector { + return &expvarCollector{ + exports: exports, + } +} + +// Describe implements Collector. +func (e *expvarCollector) Describe(ch chan<- *Desc) { + for _, desc := range e.exports { + ch <- desc + } +} + +// Collect implements Collector. +func (e *expvarCollector) Collect(ch chan<- Metric) { + for name, desc := range e.exports { + var m Metric + expVar := expvar.Get(name) + if expVar == nil { + continue + } + var v interface{} + labels := make([]string, len(desc.variableLabels)) + if err := json.Unmarshal([]byte(expVar.String()), &v); err != nil { + ch <- NewInvalidMetric(desc, err) + continue + } + var processValue func(v interface{}, i int) + processValue = func(v interface{}, i int) { + if i >= len(labels) { + copiedLabels := append(make([]string, 0, len(labels)), labels...) + switch v := v.(type) { + case float64: + m = MustNewConstMetric(desc, UntypedValue, v, copiedLabels...) + case bool: + if v { + m = MustNewConstMetric(desc, UntypedValue, 1, copiedLabels...) + } else { + m = MustNewConstMetric(desc, UntypedValue, 0, copiedLabels...) + } + default: + return + } + ch <- m + return + } + vm, ok := v.(map[string]interface{}) + if !ok { + return + } + for lv, val := range vm { + labels[i] = lv + processValue(val, i+1) + } + } + processValue(v, 0) + } +} diff --git a/vendor/github.com/prometheus/client_golang/prometheus/fnv.go b/vendor/github.com/prometheus/client_golang/prometheus/fnv.go new file mode 100644 index 00000000..3d383a73 --- /dev/null +++ b/vendor/github.com/prometheus/client_golang/prometheus/fnv.go @@ -0,0 +1,42 @@ +// Copyright 2018 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package prometheus + +// Inline and byte-free variant of hash/fnv's fnv64a. + +const ( + offset64 = 14695981039346656037 + prime64 = 1099511628211 +) + +// hashNew initializies a new fnv64a hash value. +func hashNew() uint64 { + return offset64 +} + +// hashAdd adds a string to a fnv64a hash value, returning the updated hash. +func hashAdd(h uint64, s string) uint64 { + for i := 0; i < len(s); i++ { + h ^= uint64(s[i]) + h *= prime64 + } + return h +} + +// hashAddByte adds a byte to a fnv64a hash value, returning the updated hash. +func hashAddByte(h uint64, b byte) uint64 { + h ^= uint64(b) + h *= prime64 + return h +} diff --git a/vendor/github.com/prometheus/client_golang/prometheus/gauge.go b/vendor/github.com/prometheus/client_golang/prometheus/gauge.go new file mode 100644 index 00000000..d67573f7 --- /dev/null +++ b/vendor/github.com/prometheus/client_golang/prometheus/gauge.go @@ -0,0 +1,289 @@ +// Copyright 2014 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package prometheus + +import ( + "math" + "sync/atomic" + "time" + + dto "github.com/prometheus/client_model/go" +) + +// Gauge is a Metric that represents a single numerical value that can +// arbitrarily go up and down. +// +// A Gauge is typically used for measured values like temperatures or current +// memory usage, but also "counts" that can go up and down, like the number of +// running goroutines. +// +// To create Gauge instances, use NewGauge. +type Gauge interface { + Metric + Collector + + // Set sets the Gauge to an arbitrary value. + Set(float64) + // Inc increments the Gauge by 1. Use Add to increment it by arbitrary + // values. + Inc() + // Dec decrements the Gauge by 1. Use Sub to decrement it by arbitrary + // values. + Dec() + // Add adds the given value to the Gauge. (The value can be negative, + // resulting in a decrease of the Gauge.) + Add(float64) + // Sub subtracts the given value from the Gauge. (The value can be + // negative, resulting in an increase of the Gauge.) + Sub(float64) + + // SetToCurrentTime sets the Gauge to the current Unix time in seconds. + SetToCurrentTime() +} + +// GaugeOpts is an alias for Opts. See there for doc comments. +type GaugeOpts Opts + +// NewGauge creates a new Gauge based on the provided GaugeOpts. +// +// The returned implementation is optimized for a fast Set method. If you have a +// choice for managing the value of a Gauge via Set vs. Inc/Dec/Add/Sub, pick +// the former. For example, the Inc method of the returned Gauge is slower than +// the Inc method of a Counter returned by NewCounter. This matches the typical +// scenarios for Gauges and Counters, where the former tends to be Set-heavy and +// the latter Inc-heavy. +func NewGauge(opts GaugeOpts) Gauge { + desc := NewDesc( + BuildFQName(opts.Namespace, opts.Subsystem, opts.Name), + opts.Help, + nil, + opts.ConstLabels, + ) + result := &gauge{desc: desc, labelPairs: desc.constLabelPairs} + result.init(result) // Init self-collection. + return result +} + +type gauge struct { + // valBits contains the bits of the represented float64 value. It has + // to go first in the struct to guarantee alignment for atomic + // operations. http://golang.org/pkg/sync/atomic/#pkg-note-BUG + valBits uint64 + + selfCollector + + desc *Desc + labelPairs []*dto.LabelPair +} + +func (g *gauge) Desc() *Desc { + return g.desc +} + +func (g *gauge) Set(val float64) { + atomic.StoreUint64(&g.valBits, math.Float64bits(val)) +} + +func (g *gauge) SetToCurrentTime() { + g.Set(float64(time.Now().UnixNano()) / 1e9) +} + +func (g *gauge) Inc() { + g.Add(1) +} + +func (g *gauge) Dec() { + g.Add(-1) +} + +func (g *gauge) Add(val float64) { + for { + oldBits := atomic.LoadUint64(&g.valBits) + newBits := math.Float64bits(math.Float64frombits(oldBits) + val) + if atomic.CompareAndSwapUint64(&g.valBits, oldBits, newBits) { + return + } + } +} + +func (g *gauge) Sub(val float64) { + g.Add(val * -1) +} + +func (g *gauge) Write(out *dto.Metric) error { + val := math.Float64frombits(atomic.LoadUint64(&g.valBits)) + return populateMetric(GaugeValue, val, g.labelPairs, nil, out) +} + +// GaugeVec is a Collector that bundles a set of Gauges that all share the same +// Desc, but have different values for their variable labels. This is used if +// you want to count the same thing partitioned by various dimensions +// (e.g. number of operations queued, partitioned by user and operation +// type). Create instances with NewGaugeVec. +type GaugeVec struct { + *metricVec +} + +// NewGaugeVec creates a new GaugeVec based on the provided GaugeOpts and +// partitioned by the given label names. +func NewGaugeVec(opts GaugeOpts, labelNames []string) *GaugeVec { + desc := NewDesc( + BuildFQName(opts.Namespace, opts.Subsystem, opts.Name), + opts.Help, + labelNames, + opts.ConstLabels, + ) + return &GaugeVec{ + metricVec: newMetricVec(desc, func(lvs ...string) Metric { + if len(lvs) != len(desc.variableLabels) { + panic(makeInconsistentCardinalityError(desc.fqName, desc.variableLabels, lvs)) + } + result := &gauge{desc: desc, labelPairs: makeLabelPairs(desc, lvs)} + result.init(result) // Init self-collection. + return result + }), + } +} + +// GetMetricWithLabelValues returns the Gauge for the given slice of label +// values (same order as the VariableLabels in Desc). If that combination of +// label values is accessed for the first time, a new Gauge is created. +// +// It is possible to call this method without using the returned Gauge to only +// create the new Gauge but leave it at its starting value 0. See also the +// SummaryVec example. +// +// Keeping the Gauge for later use is possible (and should be considered if +// performance is critical), but keep in mind that Reset, DeleteLabelValues and +// Delete can be used to delete the Gauge from the GaugeVec. In that case, the +// Gauge will still exist, but it will not be exported anymore, even if a +// Gauge with the same label values is created later. See also the CounterVec +// example. +// +// An error is returned if the number of label values is not the same as the +// number of VariableLabels in Desc (minus any curried labels). +// +// Note that for more than one label value, this method is prone to mistakes +// caused by an incorrect order of arguments. Consider GetMetricWith(Labels) as +// an alternative to avoid that type of mistake. For higher label numbers, the +// latter has a much more readable (albeit more verbose) syntax, but it comes +// with a performance overhead (for creating and processing the Labels map). +func (v *GaugeVec) GetMetricWithLabelValues(lvs ...string) (Gauge, error) { + metric, err := v.metricVec.getMetricWithLabelValues(lvs...) + if metric != nil { + return metric.(Gauge), err + } + return nil, err +} + +// GetMetricWith returns the Gauge for the given Labels map (the label names +// must match those of the VariableLabels in Desc). If that label map is +// accessed for the first time, a new Gauge is created. Implications of +// creating a Gauge without using it and keeping the Gauge for later use are +// the same as for GetMetricWithLabelValues. +// +// An error is returned if the number and names of the Labels are inconsistent +// with those of the VariableLabels in Desc (minus any curried labels). +// +// This method is used for the same purpose as +// GetMetricWithLabelValues(...string). See there for pros and cons of the two +// methods. +func (v *GaugeVec) GetMetricWith(labels Labels) (Gauge, error) { + metric, err := v.metricVec.getMetricWith(labels) + if metric != nil { + return metric.(Gauge), err + } + return nil, err +} + +// WithLabelValues works as GetMetricWithLabelValues, but panics where +// GetMetricWithLabelValues would have returned an error. Not returning an +// error allows shortcuts like +// myVec.WithLabelValues("404", "GET").Add(42) +func (v *GaugeVec) WithLabelValues(lvs ...string) Gauge { + g, err := v.GetMetricWithLabelValues(lvs...) + if err != nil { + panic(err) + } + return g +} + +// With works as GetMetricWith, but panics where GetMetricWithLabels would have +// returned an error. Not returning an error allows shortcuts like +// myVec.With(prometheus.Labels{"code": "404", "method": "GET"}).Add(42) +func (v *GaugeVec) With(labels Labels) Gauge { + g, err := v.GetMetricWith(labels) + if err != nil { + panic(err) + } + return g +} + +// CurryWith returns a vector curried with the provided labels, i.e. the +// returned vector has those labels pre-set for all labeled operations performed +// on it. The cardinality of the curried vector is reduced accordingly. The +// order of the remaining labels stays the same (just with the curried labels +// taken out of the sequence – which is relevant for the +// (GetMetric)WithLabelValues methods). It is possible to curry a curried +// vector, but only with labels not yet used for currying before. +// +// The metrics contained in the GaugeVec are shared between the curried and +// uncurried vectors. They are just accessed differently. Curried and uncurried +// vectors behave identically in terms of collection. Only one must be +// registered with a given registry (usually the uncurried version). The Reset +// method deletes all metrics, even if called on a curried vector. +func (v *GaugeVec) CurryWith(labels Labels) (*GaugeVec, error) { + vec, err := v.curryWith(labels) + if vec != nil { + return &GaugeVec{vec}, err + } + return nil, err +} + +// MustCurryWith works as CurryWith but panics where CurryWith would have +// returned an error. +func (v *GaugeVec) MustCurryWith(labels Labels) *GaugeVec { + vec, err := v.CurryWith(labels) + if err != nil { + panic(err) + } + return vec +} + +// GaugeFunc is a Gauge whose value is determined at collect time by calling a +// provided function. +// +// To create GaugeFunc instances, use NewGaugeFunc. +type GaugeFunc interface { + Metric + Collector +} + +// NewGaugeFunc creates a new GaugeFunc based on the provided GaugeOpts. The +// value reported is determined by calling the given function from within the +// Write method. Take into account that metric collection may happen +// concurrently. Therefore, it must be safe to call the provided function +// concurrently. +// +// NewGaugeFunc is a good way to create an “info” style metric with a constant +// value of 1. Example: +// https://github.com/prometheus/common/blob/8558a5b7db3c84fa38b4766966059a7bd5bfa2ee/version/info.go#L36-L56 +func NewGaugeFunc(opts GaugeOpts, function func() float64) GaugeFunc { + return newValueFunc(NewDesc( + BuildFQName(opts.Namespace, opts.Subsystem, opts.Name), + opts.Help, + nil, + opts.ConstLabels, + ), GaugeValue, function) +} diff --git a/vendor/github.com/prometheus/client_golang/prometheus/go_collector.go b/vendor/github.com/prometheus/client_golang/prometheus/go_collector.go new file mode 100644 index 00000000..ea05cf42 --- /dev/null +++ b/vendor/github.com/prometheus/client_golang/prometheus/go_collector.go @@ -0,0 +1,396 @@ +// Copyright 2018 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package prometheus + +import ( + "runtime" + "runtime/debug" + "sync" + "time" +) + +type goCollector struct { + goroutinesDesc *Desc + threadsDesc *Desc + gcDesc *Desc + goInfoDesc *Desc + + // ms... are memstats related. + msLast *runtime.MemStats // Previously collected memstats. + msLastTimestamp time.Time + msMtx sync.Mutex // Protects msLast and msLastTimestamp. + msMetrics memStatsMetrics + msRead func(*runtime.MemStats) // For mocking in tests. + msMaxWait time.Duration // Wait time for fresh memstats. + msMaxAge time.Duration // Maximum allowed age of old memstats. +} + +// NewGoCollector returns a collector that exports metrics about the current Go +// process. This includes memory stats. To collect those, runtime.ReadMemStats +// is called. This requires to “stop the world”, which usually only happens for +// garbage collection (GC). Take the following implications into account when +// deciding whether to use the Go collector: +// +// 1. The performance impact of stopping the world is the more relevant the more +// frequently metrics are collected. However, with Go1.9 or later the +// stop-the-world time per metrics collection is very short (~25µs) so that the +// performance impact will only matter in rare cases. However, with older Go +// versions, the stop-the-world duration depends on the heap size and can be +// quite significant (~1.7 ms/GiB as per +// https://go-review.googlesource.com/c/go/+/34937). +// +// 2. During an ongoing GC, nothing else can stop the world. Therefore, if the +// metrics collection happens to coincide with GC, it will only complete after +// GC has finished. Usually, GC is fast enough to not cause problems. However, +// with a very large heap, GC might take multiple seconds, which is enough to +// cause scrape timeouts in common setups. To avoid this problem, the Go +// collector will use the memstats from a previous collection if +// runtime.ReadMemStats takes more than 1s. However, if there are no previously +// collected memstats, or their collection is more than 5m ago, the collection +// will block until runtime.ReadMemStats succeeds. (The problem might be solved +// in Go1.13, see https://github.com/golang/go/issues/19812 for the related Go +// issue.) +func NewGoCollector() Collector { + return &goCollector{ + goroutinesDesc: NewDesc( + "go_goroutines", + "Number of goroutines that currently exist.", + nil, nil), + threadsDesc: NewDesc( + "go_threads", + "Number of OS threads created.", + nil, nil), + gcDesc: NewDesc( + "go_gc_duration_seconds", + "A summary of the pause duration of garbage collection cycles.", + nil, nil), + goInfoDesc: NewDesc( + "go_info", + "Information about the Go environment.", + nil, Labels{"version": runtime.Version()}), + msLast: &runtime.MemStats{}, + msRead: runtime.ReadMemStats, + msMaxWait: time.Second, + msMaxAge: 5 * time.Minute, + msMetrics: memStatsMetrics{ + { + desc: NewDesc( + memstatNamespace("alloc_bytes"), + "Number of bytes allocated and still in use.", + nil, nil, + ), + eval: func(ms *runtime.MemStats) float64 { return float64(ms.Alloc) }, + valType: GaugeValue, + }, { + desc: NewDesc( + memstatNamespace("alloc_bytes_total"), + "Total number of bytes allocated, even if freed.", + nil, nil, + ), + eval: func(ms *runtime.MemStats) float64 { return float64(ms.TotalAlloc) }, + valType: CounterValue, + }, { + desc: NewDesc( + memstatNamespace("sys_bytes"), + "Number of bytes obtained from system.", + nil, nil, + ), + eval: func(ms *runtime.MemStats) float64 { return float64(ms.Sys) }, + valType: GaugeValue, + }, { + desc: NewDesc( + memstatNamespace("lookups_total"), + "Total number of pointer lookups.", + nil, nil, + ), + eval: func(ms *runtime.MemStats) float64 { return float64(ms.Lookups) }, + valType: CounterValue, + }, { + desc: NewDesc( + memstatNamespace("mallocs_total"), + "Total number of mallocs.", + nil, nil, + ), + eval: func(ms *runtime.MemStats) float64 { return float64(ms.Mallocs) }, + valType: CounterValue, + }, { + desc: NewDesc( + memstatNamespace("frees_total"), + "Total number of frees.", + nil, nil, + ), + eval: func(ms *runtime.MemStats) float64 { return float64(ms.Frees) }, + valType: CounterValue, + }, { + desc: NewDesc( + memstatNamespace("heap_alloc_bytes"), + "Number of heap bytes allocated and still in use.", + nil, nil, + ), + eval: func(ms *runtime.MemStats) float64 { return float64(ms.HeapAlloc) }, + valType: GaugeValue, + }, { + desc: NewDesc( + memstatNamespace("heap_sys_bytes"), + "Number of heap bytes obtained from system.", + nil, nil, + ), + eval: func(ms *runtime.MemStats) float64 { return float64(ms.HeapSys) }, + valType: GaugeValue, + }, { + desc: NewDesc( + memstatNamespace("heap_idle_bytes"), + "Number of heap bytes waiting to be used.", + nil, nil, + ), + eval: func(ms *runtime.MemStats) float64 { return float64(ms.HeapIdle) }, + valType: GaugeValue, + }, { + desc: NewDesc( + memstatNamespace("heap_inuse_bytes"), + "Number of heap bytes that are in use.", + nil, nil, + ), + eval: func(ms *runtime.MemStats) float64 { return float64(ms.HeapInuse) }, + valType: GaugeValue, + }, { + desc: NewDesc( + memstatNamespace("heap_released_bytes"), + "Number of heap bytes released to OS.", + nil, nil, + ), + eval: func(ms *runtime.MemStats) float64 { return float64(ms.HeapReleased) }, + valType: GaugeValue, + }, { + desc: NewDesc( + memstatNamespace("heap_objects"), + "Number of allocated objects.", + nil, nil, + ), + eval: func(ms *runtime.MemStats) float64 { return float64(ms.HeapObjects) }, + valType: GaugeValue, + }, { + desc: NewDesc( + memstatNamespace("stack_inuse_bytes"), + "Number of bytes in use by the stack allocator.", + nil, nil, + ), + eval: func(ms *runtime.MemStats) float64 { return float64(ms.StackInuse) }, + valType: GaugeValue, + }, { + desc: NewDesc( + memstatNamespace("stack_sys_bytes"), + "Number of bytes obtained from system for stack allocator.", + nil, nil, + ), + eval: func(ms *runtime.MemStats) float64 { return float64(ms.StackSys) }, + valType: GaugeValue, + }, { + desc: NewDesc( + memstatNamespace("mspan_inuse_bytes"), + "Number of bytes in use by mspan structures.", + nil, nil, + ), + eval: func(ms *runtime.MemStats) float64 { return float64(ms.MSpanInuse) }, + valType: GaugeValue, + }, { + desc: NewDesc( + memstatNamespace("mspan_sys_bytes"), + "Number of bytes used for mspan structures obtained from system.", + nil, nil, + ), + eval: func(ms *runtime.MemStats) float64 { return float64(ms.MSpanSys) }, + valType: GaugeValue, + }, { + desc: NewDesc( + memstatNamespace("mcache_inuse_bytes"), + "Number of bytes in use by mcache structures.", + nil, nil, + ), + eval: func(ms *runtime.MemStats) float64 { return float64(ms.MCacheInuse) }, + valType: GaugeValue, + }, { + desc: NewDesc( + memstatNamespace("mcache_sys_bytes"), + "Number of bytes used for mcache structures obtained from system.", + nil, nil, + ), + eval: func(ms *runtime.MemStats) float64 { return float64(ms.MCacheSys) }, + valType: GaugeValue, + }, { + desc: NewDesc( + memstatNamespace("buck_hash_sys_bytes"), + "Number of bytes used by the profiling bucket hash table.", + nil, nil, + ), + eval: func(ms *runtime.MemStats) float64 { return float64(ms.BuckHashSys) }, + valType: GaugeValue, + }, { + desc: NewDesc( + memstatNamespace("gc_sys_bytes"), + "Number of bytes used for garbage collection system metadata.", + nil, nil, + ), + eval: func(ms *runtime.MemStats) float64 { return float64(ms.GCSys) }, + valType: GaugeValue, + }, { + desc: NewDesc( + memstatNamespace("other_sys_bytes"), + "Number of bytes used for other system allocations.", + nil, nil, + ), + eval: func(ms *runtime.MemStats) float64 { return float64(ms.OtherSys) }, + valType: GaugeValue, + }, { + desc: NewDesc( + memstatNamespace("next_gc_bytes"), + "Number of heap bytes when next garbage collection will take place.", + nil, nil, + ), + eval: func(ms *runtime.MemStats) float64 { return float64(ms.NextGC) }, + valType: GaugeValue, + }, { + desc: NewDesc( + memstatNamespace("last_gc_time_seconds"), + "Number of seconds since 1970 of last garbage collection.", + nil, nil, + ), + eval: func(ms *runtime.MemStats) float64 { return float64(ms.LastGC) / 1e9 }, + valType: GaugeValue, + }, { + desc: NewDesc( + memstatNamespace("gc_cpu_fraction"), + "The fraction of this program's available CPU time used by the GC since the program started.", + nil, nil, + ), + eval: func(ms *runtime.MemStats) float64 { return ms.GCCPUFraction }, + valType: GaugeValue, + }, + }, + } +} + +func memstatNamespace(s string) string { + return "go_memstats_" + s +} + +// Describe returns all descriptions of the collector. +func (c *goCollector) Describe(ch chan<- *Desc) { + ch <- c.goroutinesDesc + ch <- c.threadsDesc + ch <- c.gcDesc + ch <- c.goInfoDesc + for _, i := range c.msMetrics { + ch <- i.desc + } +} + +// Collect returns the current state of all metrics of the collector. +func (c *goCollector) Collect(ch chan<- Metric) { + var ( + ms = &runtime.MemStats{} + done = make(chan struct{}) + ) + // Start reading memstats first as it might take a while. + go func() { + c.msRead(ms) + c.msMtx.Lock() + c.msLast = ms + c.msLastTimestamp = time.Now() + c.msMtx.Unlock() + close(done) + }() + + ch <- MustNewConstMetric(c.goroutinesDesc, GaugeValue, float64(runtime.NumGoroutine())) + n, _ := runtime.ThreadCreateProfile(nil) + ch <- MustNewConstMetric(c.threadsDesc, GaugeValue, float64(n)) + + var stats debug.GCStats + stats.PauseQuantiles = make([]time.Duration, 5) + debug.ReadGCStats(&stats) + + quantiles := make(map[float64]float64) + for idx, pq := range stats.PauseQuantiles[1:] { + quantiles[float64(idx+1)/float64(len(stats.PauseQuantiles)-1)] = pq.Seconds() + } + quantiles[0.0] = stats.PauseQuantiles[0].Seconds() + ch <- MustNewConstSummary(c.gcDesc, uint64(stats.NumGC), stats.PauseTotal.Seconds(), quantiles) + + ch <- MustNewConstMetric(c.goInfoDesc, GaugeValue, 1) + + timer := time.NewTimer(c.msMaxWait) + select { + case <-done: // Our own ReadMemStats succeeded in time. Use it. + timer.Stop() // Important for high collection frequencies to not pile up timers. + c.msCollect(ch, ms) + return + case <-timer.C: // Time out, use last memstats if possible. Continue below. + } + c.msMtx.Lock() + if time.Since(c.msLastTimestamp) < c.msMaxAge { + // Last memstats are recent enough. Collect from them under the lock. + c.msCollect(ch, c.msLast) + c.msMtx.Unlock() + return + } + // If we are here, the last memstats are too old or don't exist. We have + // to wait until our own ReadMemStats finally completes. For that to + // happen, we have to release the lock. + c.msMtx.Unlock() + <-done + c.msCollect(ch, ms) +} + +func (c *goCollector) msCollect(ch chan<- Metric, ms *runtime.MemStats) { + for _, i := range c.msMetrics { + ch <- MustNewConstMetric(i.desc, i.valType, i.eval(ms)) + } +} + +// memStatsMetrics provide description, value, and value type for memstat metrics. +type memStatsMetrics []struct { + desc *Desc + eval func(*runtime.MemStats) float64 + valType ValueType +} + +// NewBuildInfoCollector returns a collector collecting a single metric +// "go_build_info" with the constant value 1 and three labels "path", "version", +// and "checksum". Their label values contain the main module path, version, and +// checksum, respectively. The labels will only have meaningful values if the +// binary is built with Go module support and from source code retrieved from +// the source repository (rather than the local file system). This is usually +// accomplished by building from outside of GOPATH, specifying the full address +// of the main package, e.g. "GO111MODULE=on go run +// github.com/prometheus/client_golang/examples/random". If built without Go +// module support, all label values will be "unknown". If built with Go module +// support but using the source code from the local file system, the "path" will +// be set appropriately, but "checksum" will be empty and "version" will be +// "(devel)". +// +// This collector uses only the build information for the main module. See +// https://github.com/povilasv/prommod for an example of a collector for the +// module dependencies. +func NewBuildInfoCollector() Collector { + path, version, sum := readBuildInfo() + c := &selfCollector{MustNewConstMetric( + NewDesc( + "go_build_info", + "Build information about the main Go module.", + nil, Labels{"path": path, "version": version, "checksum": sum}, + ), + GaugeValue, 1)} + c.init(c.self) + return c +} diff --git a/vendor/github.com/prometheus/client_golang/prometheus/histogram.go b/vendor/github.com/prometheus/client_golang/prometheus/histogram.go new file mode 100644 index 00000000..d4ea301a --- /dev/null +++ b/vendor/github.com/prometheus/client_golang/prometheus/histogram.go @@ -0,0 +1,637 @@ +// Copyright 2015 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package prometheus + +import ( + "fmt" + "math" + "runtime" + "sort" + "sync" + "sync/atomic" + "time" + + //lint:ignore SA1019 Need to keep deprecated package for compatibility. + "github.com/golang/protobuf/proto" + + dto "github.com/prometheus/client_model/go" +) + +// A Histogram counts individual observations from an event or sample stream in +// configurable buckets. Similar to a summary, it also provides a sum of +// observations and an observation count. +// +// On the Prometheus server, quantiles can be calculated from a Histogram using +// the histogram_quantile function in the query language. +// +// Note that Histograms, in contrast to Summaries, can be aggregated with the +// Prometheus query language (see the documentation for detailed +// procedures). However, Histograms require the user to pre-define suitable +// buckets, and they are in general less accurate. The Observe method of a +// Histogram has a very low performance overhead in comparison with the Observe +// method of a Summary. +// +// To create Histogram instances, use NewHistogram. +type Histogram interface { + Metric + Collector + + // Observe adds a single observation to the histogram. + Observe(float64) +} + +// bucketLabel is used for the label that defines the upper bound of a +// bucket of a histogram ("le" -> "less or equal"). +const bucketLabel = "le" + +// DefBuckets are the default Histogram buckets. The default buckets are +// tailored to broadly measure the response time (in seconds) of a network +// service. Most likely, however, you will be required to define buckets +// customized to your use case. +var ( + DefBuckets = []float64{.005, .01, .025, .05, .1, .25, .5, 1, 2.5, 5, 10} + + errBucketLabelNotAllowed = fmt.Errorf( + "%q is not allowed as label name in histograms", bucketLabel, + ) +) + +// LinearBuckets creates 'count' buckets, each 'width' wide, where the lowest +// bucket has an upper bound of 'start'. The final +Inf bucket is not counted +// and not included in the returned slice. The returned slice is meant to be +// used for the Buckets field of HistogramOpts. +// +// The function panics if 'count' is zero or negative. +func LinearBuckets(start, width float64, count int) []float64 { + if count < 1 { + panic("LinearBuckets needs a positive count") + } + buckets := make([]float64, count) + for i := range buckets { + buckets[i] = start + start += width + } + return buckets +} + +// ExponentialBuckets creates 'count' buckets, where the lowest bucket has an +// upper bound of 'start' and each following bucket's upper bound is 'factor' +// times the previous bucket's upper bound. The final +Inf bucket is not counted +// and not included in the returned slice. The returned slice is meant to be +// used for the Buckets field of HistogramOpts. +// +// The function panics if 'count' is 0 or negative, if 'start' is 0 or negative, +// or if 'factor' is less than or equal 1. +func ExponentialBuckets(start, factor float64, count int) []float64 { + if count < 1 { + panic("ExponentialBuckets needs a positive count") + } + if start <= 0 { + panic("ExponentialBuckets needs a positive start value") + } + if factor <= 1 { + panic("ExponentialBuckets needs a factor greater than 1") + } + buckets := make([]float64, count) + for i := range buckets { + buckets[i] = start + start *= factor + } + return buckets +} + +// HistogramOpts bundles the options for creating a Histogram metric. It is +// mandatory to set Name to a non-empty string. All other fields are optional +// and can safely be left at their zero value, although it is strongly +// encouraged to set a Help string. +type HistogramOpts struct { + // Namespace, Subsystem, and Name are components of the fully-qualified + // name of the Histogram (created by joining these components with + // "_"). Only Name is mandatory, the others merely help structuring the + // name. Note that the fully-qualified name of the Histogram must be a + // valid Prometheus metric name. + Namespace string + Subsystem string + Name string + + // Help provides information about this Histogram. + // + // Metrics with the same fully-qualified name must have the same Help + // string. + Help string + + // ConstLabels are used to attach fixed labels to this metric. Metrics + // with the same fully-qualified name must have the same label names in + // their ConstLabels. + // + // ConstLabels are only used rarely. In particular, do not use them to + // attach the same labels to all your metrics. Those use cases are + // better covered by target labels set by the scraping Prometheus + // server, or by one specific metric (e.g. a build_info or a + // machine_role metric). See also + // https://prometheus.io/docs/instrumenting/writing_exporters/#target-labels-not-static-scraped-labels + ConstLabels Labels + + // Buckets defines the buckets into which observations are counted. Each + // element in the slice is the upper inclusive bound of a bucket. The + // values must be sorted in strictly increasing order. There is no need + // to add a highest bucket with +Inf bound, it will be added + // implicitly. The default value is DefBuckets. + Buckets []float64 +} + +// NewHistogram creates a new Histogram based on the provided HistogramOpts. It +// panics if the buckets in HistogramOpts are not in strictly increasing order. +// +// The returned implementation also implements ExemplarObserver. It is safe to +// perform the corresponding type assertion. Exemplars are tracked separately +// for each bucket. +func NewHistogram(opts HistogramOpts) Histogram { + return newHistogram( + NewDesc( + BuildFQName(opts.Namespace, opts.Subsystem, opts.Name), + opts.Help, + nil, + opts.ConstLabels, + ), + opts, + ) +} + +func newHistogram(desc *Desc, opts HistogramOpts, labelValues ...string) Histogram { + if len(desc.variableLabels) != len(labelValues) { + panic(makeInconsistentCardinalityError(desc.fqName, desc.variableLabels, labelValues)) + } + + for _, n := range desc.variableLabels { + if n == bucketLabel { + panic(errBucketLabelNotAllowed) + } + } + for _, lp := range desc.constLabelPairs { + if lp.GetName() == bucketLabel { + panic(errBucketLabelNotAllowed) + } + } + + if len(opts.Buckets) == 0 { + opts.Buckets = DefBuckets + } + + h := &histogram{ + desc: desc, + upperBounds: opts.Buckets, + labelPairs: makeLabelPairs(desc, labelValues), + counts: [2]*histogramCounts{{}, {}}, + now: time.Now, + } + for i, upperBound := range h.upperBounds { + if i < len(h.upperBounds)-1 { + if upperBound >= h.upperBounds[i+1] { + panic(fmt.Errorf( + "histogram buckets must be in increasing order: %f >= %f", + upperBound, h.upperBounds[i+1], + )) + } + } else { + if math.IsInf(upperBound, +1) { + // The +Inf bucket is implicit. Remove it here. + h.upperBounds = h.upperBounds[:i] + } + } + } + // Finally we know the final length of h.upperBounds and can make buckets + // for both counts as well as exemplars: + h.counts[0].buckets = make([]uint64, len(h.upperBounds)) + h.counts[1].buckets = make([]uint64, len(h.upperBounds)) + h.exemplars = make([]atomic.Value, len(h.upperBounds)+1) + + h.init(h) // Init self-collection. + return h +} + +type histogramCounts struct { + // sumBits contains the bits of the float64 representing the sum of all + // observations. sumBits and count have to go first in the struct to + // guarantee alignment for atomic operations. + // http://golang.org/pkg/sync/atomic/#pkg-note-BUG + sumBits uint64 + count uint64 + buckets []uint64 +} + +type histogram struct { + // countAndHotIdx enables lock-free writes with use of atomic updates. + // The most significant bit is the hot index [0 or 1] of the count field + // below. Observe calls update the hot one. All remaining bits count the + // number of Observe calls. Observe starts by incrementing this counter, + // and finish by incrementing the count field in the respective + // histogramCounts, as a marker for completion. + // + // Calls of the Write method (which are non-mutating reads from the + // perspective of the histogram) swap the hot–cold under the writeMtx + // lock. A cooldown is awaited (while locked) by comparing the number of + // observations with the initiation count. Once they match, then the + // last observation on the now cool one has completed. All cool fields must + // be merged into the new hot before releasing writeMtx. + // + // Fields with atomic access first! See alignment constraint: + // http://golang.org/pkg/sync/atomic/#pkg-note-BUG + countAndHotIdx uint64 + + selfCollector + desc *Desc + writeMtx sync.Mutex // Only used in the Write method. + + // Two counts, one is "hot" for lock-free observations, the other is + // "cold" for writing out a dto.Metric. It has to be an array of + // pointers to guarantee 64bit alignment of the histogramCounts, see + // http://golang.org/pkg/sync/atomic/#pkg-note-BUG. + counts [2]*histogramCounts + + upperBounds []float64 + labelPairs []*dto.LabelPair + exemplars []atomic.Value // One more than buckets (to include +Inf), each a *dto.Exemplar. + + now func() time.Time // To mock out time.Now() for testing. +} + +func (h *histogram) Desc() *Desc { + return h.desc +} + +func (h *histogram) Observe(v float64) { + h.observe(v, h.findBucket(v)) +} + +func (h *histogram) ObserveWithExemplar(v float64, e Labels) { + i := h.findBucket(v) + h.observe(v, i) + h.updateExemplar(v, i, e) +} + +func (h *histogram) Write(out *dto.Metric) error { + // For simplicity, we protect this whole method by a mutex. It is not in + // the hot path, i.e. Observe is called much more often than Write. The + // complication of making Write lock-free isn't worth it, if possible at + // all. + h.writeMtx.Lock() + defer h.writeMtx.Unlock() + + // Adding 1<<63 switches the hot index (from 0 to 1 or from 1 to 0) + // without touching the count bits. See the struct comments for a full + // description of the algorithm. + n := atomic.AddUint64(&h.countAndHotIdx, 1<<63) + // count is contained unchanged in the lower 63 bits. + count := n & ((1 << 63) - 1) + // The most significant bit tells us which counts is hot. The complement + // is thus the cold one. + hotCounts := h.counts[n>>63] + coldCounts := h.counts[(^n)>>63] + + // Await cooldown. + for count != atomic.LoadUint64(&coldCounts.count) { + runtime.Gosched() // Let observations get work done. + } + + his := &dto.Histogram{ + Bucket: make([]*dto.Bucket, len(h.upperBounds)), + SampleCount: proto.Uint64(count), + SampleSum: proto.Float64(math.Float64frombits(atomic.LoadUint64(&coldCounts.sumBits))), + } + var cumCount uint64 + for i, upperBound := range h.upperBounds { + cumCount += atomic.LoadUint64(&coldCounts.buckets[i]) + his.Bucket[i] = &dto.Bucket{ + CumulativeCount: proto.Uint64(cumCount), + UpperBound: proto.Float64(upperBound), + } + if e := h.exemplars[i].Load(); e != nil { + his.Bucket[i].Exemplar = e.(*dto.Exemplar) + } + } + // If there is an exemplar for the +Inf bucket, we have to add that bucket explicitly. + if e := h.exemplars[len(h.upperBounds)].Load(); e != nil { + b := &dto.Bucket{ + CumulativeCount: proto.Uint64(count), + UpperBound: proto.Float64(math.Inf(1)), + Exemplar: e.(*dto.Exemplar), + } + his.Bucket = append(his.Bucket, b) + } + + out.Histogram = his + out.Label = h.labelPairs + + // Finally add all the cold counts to the new hot counts and reset the cold counts. + atomic.AddUint64(&hotCounts.count, count) + atomic.StoreUint64(&coldCounts.count, 0) + for { + oldBits := atomic.LoadUint64(&hotCounts.sumBits) + newBits := math.Float64bits(math.Float64frombits(oldBits) + his.GetSampleSum()) + if atomic.CompareAndSwapUint64(&hotCounts.sumBits, oldBits, newBits) { + atomic.StoreUint64(&coldCounts.sumBits, 0) + break + } + } + for i := range h.upperBounds { + atomic.AddUint64(&hotCounts.buckets[i], atomic.LoadUint64(&coldCounts.buckets[i])) + atomic.StoreUint64(&coldCounts.buckets[i], 0) + } + return nil +} + +// findBucket returns the index of the bucket for the provided value, or +// len(h.upperBounds) for the +Inf bucket. +func (h *histogram) findBucket(v float64) int { + // TODO(beorn7): For small numbers of buckets (<30), a linear search is + // slightly faster than the binary search. If we really care, we could + // switch from one search strategy to the other depending on the number + // of buckets. + // + // Microbenchmarks (BenchmarkHistogramNoLabels): + // 11 buckets: 38.3 ns/op linear - binary 48.7 ns/op + // 100 buckets: 78.1 ns/op linear - binary 54.9 ns/op + // 300 buckets: 154 ns/op linear - binary 61.6 ns/op + return sort.SearchFloat64s(h.upperBounds, v) +} + +// observe is the implementation for Observe without the findBucket part. +func (h *histogram) observe(v float64, bucket int) { + // We increment h.countAndHotIdx so that the counter in the lower + // 63 bits gets incremented. At the same time, we get the new value + // back, which we can use to find the currently-hot counts. + n := atomic.AddUint64(&h.countAndHotIdx, 1) + hotCounts := h.counts[n>>63] + + if bucket < len(h.upperBounds) { + atomic.AddUint64(&hotCounts.buckets[bucket], 1) + } + for { + oldBits := atomic.LoadUint64(&hotCounts.sumBits) + newBits := math.Float64bits(math.Float64frombits(oldBits) + v) + if atomic.CompareAndSwapUint64(&hotCounts.sumBits, oldBits, newBits) { + break + } + } + // Increment count last as we take it as a signal that the observation + // is complete. + atomic.AddUint64(&hotCounts.count, 1) +} + +// updateExemplar replaces the exemplar for the provided bucket. With empty +// labels, it's a no-op. It panics if any of the labels is invalid. +func (h *histogram) updateExemplar(v float64, bucket int, l Labels) { + if l == nil { + return + } + e, err := newExemplar(v, h.now(), l) + if err != nil { + panic(err) + } + h.exemplars[bucket].Store(e) +} + +// HistogramVec is a Collector that bundles a set of Histograms that all share the +// same Desc, but have different values for their variable labels. This is used +// if you want to count the same thing partitioned by various dimensions +// (e.g. HTTP request latencies, partitioned by status code and method). Create +// instances with NewHistogramVec. +type HistogramVec struct { + *metricVec +} + +// NewHistogramVec creates a new HistogramVec based on the provided HistogramOpts and +// partitioned by the given label names. +func NewHistogramVec(opts HistogramOpts, labelNames []string) *HistogramVec { + desc := NewDesc( + BuildFQName(opts.Namespace, opts.Subsystem, opts.Name), + opts.Help, + labelNames, + opts.ConstLabels, + ) + return &HistogramVec{ + metricVec: newMetricVec(desc, func(lvs ...string) Metric { + return newHistogram(desc, opts, lvs...) + }), + } +} + +// GetMetricWithLabelValues returns the Histogram for the given slice of label +// values (same order as the VariableLabels in Desc). If that combination of +// label values is accessed for the first time, a new Histogram is created. +// +// It is possible to call this method without using the returned Histogram to only +// create the new Histogram but leave it at its starting value, a Histogram without +// any observations. +// +// Keeping the Histogram for later use is possible (and should be considered if +// performance is critical), but keep in mind that Reset, DeleteLabelValues and +// Delete can be used to delete the Histogram from the HistogramVec. In that case, the +// Histogram will still exist, but it will not be exported anymore, even if a +// Histogram with the same label values is created later. See also the CounterVec +// example. +// +// An error is returned if the number of label values is not the same as the +// number of VariableLabels in Desc (minus any curried labels). +// +// Note that for more than one label value, this method is prone to mistakes +// caused by an incorrect order of arguments. Consider GetMetricWith(Labels) as +// an alternative to avoid that type of mistake. For higher label numbers, the +// latter has a much more readable (albeit more verbose) syntax, but it comes +// with a performance overhead (for creating and processing the Labels map). +// See also the GaugeVec example. +func (v *HistogramVec) GetMetricWithLabelValues(lvs ...string) (Observer, error) { + metric, err := v.metricVec.getMetricWithLabelValues(lvs...) + if metric != nil { + return metric.(Observer), err + } + return nil, err +} + +// GetMetricWith returns the Histogram for the given Labels map (the label names +// must match those of the VariableLabels in Desc). If that label map is +// accessed for the first time, a new Histogram is created. Implications of +// creating a Histogram without using it and keeping the Histogram for later use +// are the same as for GetMetricWithLabelValues. +// +// An error is returned if the number and names of the Labels are inconsistent +// with those of the VariableLabels in Desc (minus any curried labels). +// +// This method is used for the same purpose as +// GetMetricWithLabelValues(...string). See there for pros and cons of the two +// methods. +func (v *HistogramVec) GetMetricWith(labels Labels) (Observer, error) { + metric, err := v.metricVec.getMetricWith(labels) + if metric != nil { + return metric.(Observer), err + } + return nil, err +} + +// WithLabelValues works as GetMetricWithLabelValues, but panics where +// GetMetricWithLabelValues would have returned an error. Not returning an +// error allows shortcuts like +// myVec.WithLabelValues("404", "GET").Observe(42.21) +func (v *HistogramVec) WithLabelValues(lvs ...string) Observer { + h, err := v.GetMetricWithLabelValues(lvs...) + if err != nil { + panic(err) + } + return h +} + +// With works as GetMetricWith but panics where GetMetricWithLabels would have +// returned an error. Not returning an error allows shortcuts like +// myVec.With(prometheus.Labels{"code": "404", "method": "GET"}).Observe(42.21) +func (v *HistogramVec) With(labels Labels) Observer { + h, err := v.GetMetricWith(labels) + if err != nil { + panic(err) + } + return h +} + +// CurryWith returns a vector curried with the provided labels, i.e. the +// returned vector has those labels pre-set for all labeled operations performed +// on it. The cardinality of the curried vector is reduced accordingly. The +// order of the remaining labels stays the same (just with the curried labels +// taken out of the sequence – which is relevant for the +// (GetMetric)WithLabelValues methods). It is possible to curry a curried +// vector, but only with labels not yet used for currying before. +// +// The metrics contained in the HistogramVec are shared between the curried and +// uncurried vectors. They are just accessed differently. Curried and uncurried +// vectors behave identically in terms of collection. Only one must be +// registered with a given registry (usually the uncurried version). The Reset +// method deletes all metrics, even if called on a curried vector. +func (v *HistogramVec) CurryWith(labels Labels) (ObserverVec, error) { + vec, err := v.curryWith(labels) + if vec != nil { + return &HistogramVec{vec}, err + } + return nil, err +} + +// MustCurryWith works as CurryWith but panics where CurryWith would have +// returned an error. +func (v *HistogramVec) MustCurryWith(labels Labels) ObserverVec { + vec, err := v.CurryWith(labels) + if err != nil { + panic(err) + } + return vec +} + +type constHistogram struct { + desc *Desc + count uint64 + sum float64 + buckets map[float64]uint64 + labelPairs []*dto.LabelPair +} + +func (h *constHistogram) Desc() *Desc { + return h.desc +} + +func (h *constHistogram) Write(out *dto.Metric) error { + his := &dto.Histogram{} + buckets := make([]*dto.Bucket, 0, len(h.buckets)) + + his.SampleCount = proto.Uint64(h.count) + his.SampleSum = proto.Float64(h.sum) + + for upperBound, count := range h.buckets { + buckets = append(buckets, &dto.Bucket{ + CumulativeCount: proto.Uint64(count), + UpperBound: proto.Float64(upperBound), + }) + } + + if len(buckets) > 0 { + sort.Sort(buckSort(buckets)) + } + his.Bucket = buckets + + out.Histogram = his + out.Label = h.labelPairs + + return nil +} + +// NewConstHistogram returns a metric representing a Prometheus histogram with +// fixed values for the count, sum, and bucket counts. As those parameters +// cannot be changed, the returned value does not implement the Histogram +// interface (but only the Metric interface). Users of this package will not +// have much use for it in regular operations. However, when implementing custom +// Collectors, it is useful as a throw-away metric that is generated on the fly +// to send it to Prometheus in the Collect method. +// +// buckets is a map of upper bounds to cumulative counts, excluding the +Inf +// bucket. +// +// NewConstHistogram returns an error if the length of labelValues is not +// consistent with the variable labels in Desc or if Desc is invalid. +func NewConstHistogram( + desc *Desc, + count uint64, + sum float64, + buckets map[float64]uint64, + labelValues ...string, +) (Metric, error) { + if desc.err != nil { + return nil, desc.err + } + if err := validateLabelValues(labelValues, len(desc.variableLabels)); err != nil { + return nil, err + } + return &constHistogram{ + desc: desc, + count: count, + sum: sum, + buckets: buckets, + labelPairs: makeLabelPairs(desc, labelValues), + }, nil +} + +// MustNewConstHistogram is a version of NewConstHistogram that panics where +// NewConstHistogram would have returned an error. +func MustNewConstHistogram( + desc *Desc, + count uint64, + sum float64, + buckets map[float64]uint64, + labelValues ...string, +) Metric { + m, err := NewConstHistogram(desc, count, sum, buckets, labelValues...) + if err != nil { + panic(err) + } + return m +} + +type buckSort []*dto.Bucket + +func (s buckSort) Len() int { + return len(s) +} + +func (s buckSort) Swap(i, j int) { + s[i], s[j] = s[j], s[i] +} + +func (s buckSort) Less(i, j int) bool { + return s[i].GetUpperBound() < s[j].GetUpperBound() +} diff --git a/vendor/github.com/prometheus/client_golang/prometheus/internal/metric.go b/vendor/github.com/prometheus/client_golang/prometheus/internal/metric.go new file mode 100644 index 00000000..351c26e1 --- /dev/null +++ b/vendor/github.com/prometheus/client_golang/prometheus/internal/metric.go @@ -0,0 +1,85 @@ +// Copyright 2018 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package internal + +import ( + "sort" + + dto "github.com/prometheus/client_model/go" +) + +// metricSorter is a sortable slice of *dto.Metric. +type metricSorter []*dto.Metric + +func (s metricSorter) Len() int { + return len(s) +} + +func (s metricSorter) Swap(i, j int) { + s[i], s[j] = s[j], s[i] +} + +func (s metricSorter) Less(i, j int) bool { + if len(s[i].Label) != len(s[j].Label) { + // This should not happen. The metrics are + // inconsistent. However, we have to deal with the fact, as + // people might use custom collectors or metric family injection + // to create inconsistent metrics. So let's simply compare the + // number of labels in this case. That will still yield + // reproducible sorting. + return len(s[i].Label) < len(s[j].Label) + } + for n, lp := range s[i].Label { + vi := lp.GetValue() + vj := s[j].Label[n].GetValue() + if vi != vj { + return vi < vj + } + } + + // We should never arrive here. Multiple metrics with the same + // label set in the same scrape will lead to undefined ingestion + // behavior. However, as above, we have to provide stable sorting + // here, even for inconsistent metrics. So sort equal metrics + // by their timestamp, with missing timestamps (implying "now") + // coming last. + if s[i].TimestampMs == nil { + return false + } + if s[j].TimestampMs == nil { + return true + } + return s[i].GetTimestampMs() < s[j].GetTimestampMs() +} + +// NormalizeMetricFamilies returns a MetricFamily slice with empty +// MetricFamilies pruned and the remaining MetricFamilies sorted by name within +// the slice, with the contained Metrics sorted within each MetricFamily. +func NormalizeMetricFamilies(metricFamiliesByName map[string]*dto.MetricFamily) []*dto.MetricFamily { + for _, mf := range metricFamiliesByName { + sort.Sort(metricSorter(mf.Metric)) + } + names := make([]string, 0, len(metricFamiliesByName)) + for name, mf := range metricFamiliesByName { + if len(mf.Metric) > 0 { + names = append(names, name) + } + } + sort.Strings(names) + result := make([]*dto.MetricFamily, 0, len(names)) + for _, name := range names { + result = append(result, metricFamiliesByName[name]) + } + return result +} diff --git a/vendor/github.com/prometheus/client_golang/prometheus/labels.go b/vendor/github.com/prometheus/client_golang/prometheus/labels.go new file mode 100644 index 00000000..2744443a --- /dev/null +++ b/vendor/github.com/prometheus/client_golang/prometheus/labels.go @@ -0,0 +1,87 @@ +// Copyright 2018 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package prometheus + +import ( + "errors" + "fmt" + "strings" + "unicode/utf8" + + "github.com/prometheus/common/model" +) + +// Labels represents a collection of label name -> value mappings. This type is +// commonly used with the With(Labels) and GetMetricWith(Labels) methods of +// metric vector Collectors, e.g.: +// myVec.With(Labels{"code": "404", "method": "GET"}).Add(42) +// +// The other use-case is the specification of constant label pairs in Opts or to +// create a Desc. +type Labels map[string]string + +// reservedLabelPrefix is a prefix which is not legal in user-supplied +// label names. +const reservedLabelPrefix = "__" + +var errInconsistentCardinality = errors.New("inconsistent label cardinality") + +func makeInconsistentCardinalityError(fqName string, labels, labelValues []string) error { + return fmt.Errorf( + "%s: %q has %d variable labels named %q but %d values %q were provided", + errInconsistentCardinality, fqName, + len(labels), labels, + len(labelValues), labelValues, + ) +} + +func validateValuesInLabels(labels Labels, expectedNumberOfValues int) error { + if len(labels) != expectedNumberOfValues { + return fmt.Errorf( + "%s: expected %d label values but got %d in %#v", + errInconsistentCardinality, expectedNumberOfValues, + len(labels), labels, + ) + } + + for name, val := range labels { + if !utf8.ValidString(val) { + return fmt.Errorf("label %s: value %q is not valid UTF-8", name, val) + } + } + + return nil +} + +func validateLabelValues(vals []string, expectedNumberOfValues int) error { + if len(vals) != expectedNumberOfValues { + return fmt.Errorf( + "%s: expected %d label values but got %d in %#v", + errInconsistentCardinality, expectedNumberOfValues, + len(vals), vals, + ) + } + + for _, val := range vals { + if !utf8.ValidString(val) { + return fmt.Errorf("label value %q is not valid UTF-8", val) + } + } + + return nil +} + +func checkLabelName(l string) bool { + return model.LabelName(l).IsValid() && !strings.HasPrefix(l, reservedLabelPrefix) +} diff --git a/vendor/github.com/prometheus/client_golang/prometheus/metric.go b/vendor/github.com/prometheus/client_golang/prometheus/metric.go new file mode 100644 index 00000000..35bd8bde --- /dev/null +++ b/vendor/github.com/prometheus/client_golang/prometheus/metric.go @@ -0,0 +1,176 @@ +// Copyright 2014 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package prometheus + +import ( + "strings" + "time" + + //lint:ignore SA1019 Need to keep deprecated package for compatibility. + "github.com/golang/protobuf/proto" + "github.com/prometheus/common/model" + + dto "github.com/prometheus/client_model/go" +) + +var separatorByteSlice = []byte{model.SeparatorByte} // For convenient use with xxhash. + +// A Metric models a single sample value with its meta data being exported to +// Prometheus. Implementations of Metric in this package are Gauge, Counter, +// Histogram, Summary, and Untyped. +type Metric interface { + // Desc returns the descriptor for the Metric. This method idempotently + // returns the same descriptor throughout the lifetime of the + // Metric. The returned descriptor is immutable by contract. A Metric + // unable to describe itself must return an invalid descriptor (created + // with NewInvalidDesc). + Desc() *Desc + // Write encodes the Metric into a "Metric" Protocol Buffer data + // transmission object. + // + // Metric implementations must observe concurrency safety as reads of + // this metric may occur at any time, and any blocking occurs at the + // expense of total performance of rendering all registered + // metrics. Ideally, Metric implementations should support concurrent + // readers. + // + // While populating dto.Metric, it is the responsibility of the + // implementation to ensure validity of the Metric protobuf (like valid + // UTF-8 strings or syntactically valid metric and label names). It is + // recommended to sort labels lexicographically. Callers of Write should + // still make sure of sorting if they depend on it. + Write(*dto.Metric) error + // TODO(beorn7): The original rationale of passing in a pre-allocated + // dto.Metric protobuf to save allocations has disappeared. The + // signature of this method should be changed to "Write() (*dto.Metric, + // error)". +} + +// Opts bundles the options for creating most Metric types. Each metric +// implementation XXX has its own XXXOpts type, but in most cases, it is just be +// an alias of this type (which might change when the requirement arises.) +// +// It is mandatory to set Name to a non-empty string. All other fields are +// optional and can safely be left at their zero value, although it is strongly +// encouraged to set a Help string. +type Opts struct { + // Namespace, Subsystem, and Name are components of the fully-qualified + // name of the Metric (created by joining these components with + // "_"). Only Name is mandatory, the others merely help structuring the + // name. Note that the fully-qualified name of the metric must be a + // valid Prometheus metric name. + Namespace string + Subsystem string + Name string + + // Help provides information about this metric. + // + // Metrics with the same fully-qualified name must have the same Help + // string. + Help string + + // ConstLabels are used to attach fixed labels to this metric. Metrics + // with the same fully-qualified name must have the same label names in + // their ConstLabels. + // + // ConstLabels are only used rarely. In particular, do not use them to + // attach the same labels to all your metrics. Those use cases are + // better covered by target labels set by the scraping Prometheus + // server, or by one specific metric (e.g. a build_info or a + // machine_role metric). See also + // https://prometheus.io/docs/instrumenting/writing_exporters/#target-labels,-not-static-scraped-labels + ConstLabels Labels +} + +// BuildFQName joins the given three name components by "_". Empty name +// components are ignored. If the name parameter itself is empty, an empty +// string is returned, no matter what. Metric implementations included in this +// library use this function internally to generate the fully-qualified metric +// name from the name component in their Opts. Users of the library will only +// need this function if they implement their own Metric or instantiate a Desc +// (with NewDesc) directly. +func BuildFQName(namespace, subsystem, name string) string { + if name == "" { + return "" + } + switch { + case namespace != "" && subsystem != "": + return strings.Join([]string{namespace, subsystem, name}, "_") + case namespace != "": + return strings.Join([]string{namespace, name}, "_") + case subsystem != "": + return strings.Join([]string{subsystem, name}, "_") + } + return name +} + +// labelPairSorter implements sort.Interface. It is used to sort a slice of +// dto.LabelPair pointers. +type labelPairSorter []*dto.LabelPair + +func (s labelPairSorter) Len() int { + return len(s) +} + +func (s labelPairSorter) Swap(i, j int) { + s[i], s[j] = s[j], s[i] +} + +func (s labelPairSorter) Less(i, j int) bool { + return s[i].GetName() < s[j].GetName() +} + +type invalidMetric struct { + desc *Desc + err error +} + +// NewInvalidMetric returns a metric whose Write method always returns the +// provided error. It is useful if a Collector finds itself unable to collect +// a metric and wishes to report an error to the registry. +func NewInvalidMetric(desc *Desc, err error) Metric { + return &invalidMetric{desc, err} +} + +func (m *invalidMetric) Desc() *Desc { return m.desc } + +func (m *invalidMetric) Write(*dto.Metric) error { return m.err } + +type timestampedMetric struct { + Metric + t time.Time +} + +func (m timestampedMetric) Write(pb *dto.Metric) error { + e := m.Metric.Write(pb) + pb.TimestampMs = proto.Int64(m.t.Unix()*1000 + int64(m.t.Nanosecond()/1000000)) + return e +} + +// NewMetricWithTimestamp returns a new Metric wrapping the provided Metric in a +// way that it has an explicit timestamp set to the provided Time. This is only +// useful in rare cases as the timestamp of a Prometheus metric should usually +// be set by the Prometheus server during scraping. Exceptions include mirroring +// metrics with given timestamps from other metric +// sources. +// +// NewMetricWithTimestamp works best with MustNewConstMetric, +// MustNewConstHistogram, and MustNewConstSummary, see example. +// +// Currently, the exposition formats used by Prometheus are limited to +// millisecond resolution. Thus, the provided time will be rounded down to the +// next full millisecond value. +func NewMetricWithTimestamp(t time.Time, m Metric) Metric { + return timestampedMetric{Metric: m, t: t} +} diff --git a/vendor/github.com/prometheus/client_golang/prometheus/observer.go b/vendor/github.com/prometheus/client_golang/prometheus/observer.go new file mode 100644 index 00000000..44128016 --- /dev/null +++ b/vendor/github.com/prometheus/client_golang/prometheus/observer.go @@ -0,0 +1,64 @@ +// Copyright 2017 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package prometheus + +// Observer is the interface that wraps the Observe method, which is used by +// Histogram and Summary to add observations. +type Observer interface { + Observe(float64) +} + +// The ObserverFunc type is an adapter to allow the use of ordinary +// functions as Observers. If f is a function with the appropriate +// signature, ObserverFunc(f) is an Observer that calls f. +// +// This adapter is usually used in connection with the Timer type, and there are +// two general use cases: +// +// The most common one is to use a Gauge as the Observer for a Timer. +// See the "Gauge" Timer example. +// +// The more advanced use case is to create a function that dynamically decides +// which Observer to use for observing the duration. See the "Complex" Timer +// example. +type ObserverFunc func(float64) + +// Observe calls f(value). It implements Observer. +func (f ObserverFunc) Observe(value float64) { + f(value) +} + +// ObserverVec is an interface implemented by `HistogramVec` and `SummaryVec`. +type ObserverVec interface { + GetMetricWith(Labels) (Observer, error) + GetMetricWithLabelValues(lvs ...string) (Observer, error) + With(Labels) Observer + WithLabelValues(...string) Observer + CurryWith(Labels) (ObserverVec, error) + MustCurryWith(Labels) ObserverVec + + Collector +} + +// ExemplarObserver is implemented by Observers that offer the option of +// observing a value together with an exemplar. Its ObserveWithExemplar method +// works like the Observe method of an Observer but also replaces the currently +// saved exemplar (if any) with a new one, created from the provided value, the +// current time as timestamp, and the provided Labels. Empty Labels will lead to +// a valid (label-less) exemplar. But if Labels is nil, the current exemplar is +// left in place. ObserveWithExemplar panics if any of the provided labels are +// invalid or if the provided labels contain more than 64 runes in total. +type ExemplarObserver interface { + ObserveWithExemplar(value float64, exemplar Labels) +} diff --git a/vendor/github.com/prometheus/client_golang/prometheus/process_collector.go b/vendor/github.com/prometheus/client_golang/prometheus/process_collector.go new file mode 100644 index 00000000..9b809794 --- /dev/null +++ b/vendor/github.com/prometheus/client_golang/prometheus/process_collector.go @@ -0,0 +1,151 @@ +// Copyright 2015 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package prometheus + +import ( + "errors" + "os" +) + +type processCollector struct { + collectFn func(chan<- Metric) + pidFn func() (int, error) + reportErrors bool + cpuTotal *Desc + openFDs, maxFDs *Desc + vsize, maxVsize *Desc + rss *Desc + startTime *Desc +} + +// ProcessCollectorOpts defines the behavior of a process metrics collector +// created with NewProcessCollector. +type ProcessCollectorOpts struct { + // PidFn returns the PID of the process the collector collects metrics + // for. It is called upon each collection. By default, the PID of the + // current process is used, as determined on construction time by + // calling os.Getpid(). + PidFn func() (int, error) + // If non-empty, each of the collected metrics is prefixed by the + // provided string and an underscore ("_"). + Namespace string + // If true, any error encountered during collection is reported as an + // invalid metric (see NewInvalidMetric). Otherwise, errors are ignored + // and the collected metrics will be incomplete. (Possibly, no metrics + // will be collected at all.) While that's usually not desired, it is + // appropriate for the common "mix-in" of process metrics, where process + // metrics are nice to have, but failing to collect them should not + // disrupt the collection of the remaining metrics. + ReportErrors bool +} + +// NewProcessCollector returns a collector which exports the current state of +// process metrics including CPU, memory and file descriptor usage as well as +// the process start time. The detailed behavior is defined by the provided +// ProcessCollectorOpts. The zero value of ProcessCollectorOpts creates a +// collector for the current process with an empty namespace string and no error +// reporting. +// +// The collector only works on operating systems with a Linux-style proc +// filesystem and on Microsoft Windows. On other operating systems, it will not +// collect any metrics. +func NewProcessCollector(opts ProcessCollectorOpts) Collector { + ns := "" + if len(opts.Namespace) > 0 { + ns = opts.Namespace + "_" + } + + c := &processCollector{ + reportErrors: opts.ReportErrors, + cpuTotal: NewDesc( + ns+"process_cpu_seconds_total", + "Total user and system CPU time spent in seconds.", + nil, nil, + ), + openFDs: NewDesc( + ns+"process_open_fds", + "Number of open file descriptors.", + nil, nil, + ), + maxFDs: NewDesc( + ns+"process_max_fds", + "Maximum number of open file descriptors.", + nil, nil, + ), + vsize: NewDesc( + ns+"process_virtual_memory_bytes", + "Virtual memory size in bytes.", + nil, nil, + ), + maxVsize: NewDesc( + ns+"process_virtual_memory_max_bytes", + "Maximum amount of virtual memory available in bytes.", + nil, nil, + ), + rss: NewDesc( + ns+"process_resident_memory_bytes", + "Resident memory size in bytes.", + nil, nil, + ), + startTime: NewDesc( + ns+"process_start_time_seconds", + "Start time of the process since unix epoch in seconds.", + nil, nil, + ), + } + + if opts.PidFn == nil { + pid := os.Getpid() + c.pidFn = func() (int, error) { return pid, nil } + } else { + c.pidFn = opts.PidFn + } + + // Set up process metric collection if supported by the runtime. + if canCollectProcess() { + c.collectFn = c.processCollect + } else { + c.collectFn = func(ch chan<- Metric) { + c.reportError(ch, nil, errors.New("process metrics not supported on this platform")) + } + } + + return c +} + +// Describe returns all descriptions of the collector. +func (c *processCollector) Describe(ch chan<- *Desc) { + ch <- c.cpuTotal + ch <- c.openFDs + ch <- c.maxFDs + ch <- c.vsize + ch <- c.maxVsize + ch <- c.rss + ch <- c.startTime +} + +// Collect returns the current state of all metrics of the collector. +func (c *processCollector) Collect(ch chan<- Metric) { + c.collectFn(ch) +} + +func (c *processCollector) reportError(ch chan<- Metric, desc *Desc, err error) { + if !c.reportErrors { + return + } + if desc == nil { + desc = NewInvalidDesc(err) + } + ch <- NewInvalidMetric(desc, err) +} diff --git a/vendor/github.com/prometheus/client_golang/prometheus/process_collector_other.go b/vendor/github.com/prometheus/client_golang/prometheus/process_collector_other.go new file mode 100644 index 00000000..3117461c --- /dev/null +++ b/vendor/github.com/prometheus/client_golang/prometheus/process_collector_other.go @@ -0,0 +1,65 @@ +// Copyright 2019 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +// +build !windows + +package prometheus + +import ( + "github.com/prometheus/procfs" +) + +func canCollectProcess() bool { + _, err := procfs.NewDefaultFS() + return err == nil +} + +func (c *processCollector) processCollect(ch chan<- Metric) { + pid, err := c.pidFn() + if err != nil { + c.reportError(ch, nil, err) + return + } + + p, err := procfs.NewProc(pid) + if err != nil { + c.reportError(ch, nil, err) + return + } + + if stat, err := p.Stat(); err == nil { + ch <- MustNewConstMetric(c.cpuTotal, CounterValue, stat.CPUTime()) + ch <- MustNewConstMetric(c.vsize, GaugeValue, float64(stat.VirtualMemory())) + ch <- MustNewConstMetric(c.rss, GaugeValue, float64(stat.ResidentMemory())) + if startTime, err := stat.StartTime(); err == nil { + ch <- MustNewConstMetric(c.startTime, GaugeValue, startTime) + } else { + c.reportError(ch, c.startTime, err) + } + } else { + c.reportError(ch, nil, err) + } + + if fds, err := p.FileDescriptorsLen(); err == nil { + ch <- MustNewConstMetric(c.openFDs, GaugeValue, float64(fds)) + } else { + c.reportError(ch, c.openFDs, err) + } + + if limits, err := p.Limits(); err == nil { + ch <- MustNewConstMetric(c.maxFDs, GaugeValue, float64(limits.OpenFiles)) + ch <- MustNewConstMetric(c.maxVsize, GaugeValue, float64(limits.AddressSpace)) + } else { + c.reportError(ch, nil, err) + } +} diff --git a/vendor/github.com/prometheus/client_golang/prometheus/process_collector_windows.go b/vendor/github.com/prometheus/client_golang/prometheus/process_collector_windows.go new file mode 100644 index 00000000..f973398d --- /dev/null +++ b/vendor/github.com/prometheus/client_golang/prometheus/process_collector_windows.go @@ -0,0 +1,116 @@ +// Copyright 2019 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package prometheus + +import ( + "syscall" + "unsafe" + + "golang.org/x/sys/windows" +) + +func canCollectProcess() bool { + return true +} + +var ( + modpsapi = syscall.NewLazyDLL("psapi.dll") + modkernel32 = syscall.NewLazyDLL("kernel32.dll") + + procGetProcessMemoryInfo = modpsapi.NewProc("GetProcessMemoryInfo") + procGetProcessHandleCount = modkernel32.NewProc("GetProcessHandleCount") +) + +type processMemoryCounters struct { + // System interface description + // https://docs.microsoft.com/en-us/windows/desktop/api/psapi/ns-psapi-process_memory_counters_ex + + // Refer to the Golang internal implementation + // https://golang.org/src/internal/syscall/windows/psapi_windows.go + _ uint32 + PageFaultCount uint32 + PeakWorkingSetSize uintptr + WorkingSetSize uintptr + QuotaPeakPagedPoolUsage uintptr + QuotaPagedPoolUsage uintptr + QuotaPeakNonPagedPoolUsage uintptr + QuotaNonPagedPoolUsage uintptr + PagefileUsage uintptr + PeakPagefileUsage uintptr + PrivateUsage uintptr +} + +func getProcessMemoryInfo(handle windows.Handle) (processMemoryCounters, error) { + mem := processMemoryCounters{} + r1, _, err := procGetProcessMemoryInfo.Call( + uintptr(handle), + uintptr(unsafe.Pointer(&mem)), + uintptr(unsafe.Sizeof(mem)), + ) + if r1 != 1 { + return mem, err + } else { + return mem, nil + } +} + +func getProcessHandleCount(handle windows.Handle) (uint32, error) { + var count uint32 + r1, _, err := procGetProcessHandleCount.Call( + uintptr(handle), + uintptr(unsafe.Pointer(&count)), + ) + if r1 != 1 { + return 0, err + } else { + return count, nil + } +} + +func (c *processCollector) processCollect(ch chan<- Metric) { + h, err := windows.GetCurrentProcess() + if err != nil { + c.reportError(ch, nil, err) + return + } + + var startTime, exitTime, kernelTime, userTime windows.Filetime + err = windows.GetProcessTimes(h, &startTime, &exitTime, &kernelTime, &userTime) + if err != nil { + c.reportError(ch, nil, err) + return + } + ch <- MustNewConstMetric(c.startTime, GaugeValue, float64(startTime.Nanoseconds()/1e9)) + ch <- MustNewConstMetric(c.cpuTotal, CounterValue, fileTimeToSeconds(kernelTime)+fileTimeToSeconds(userTime)) + + mem, err := getProcessMemoryInfo(h) + if err != nil { + c.reportError(ch, nil, err) + return + } + ch <- MustNewConstMetric(c.vsize, GaugeValue, float64(mem.PrivateUsage)) + ch <- MustNewConstMetric(c.rss, GaugeValue, float64(mem.WorkingSetSize)) + + handles, err := getProcessHandleCount(h) + if err != nil { + c.reportError(ch, nil, err) + return + } + ch <- MustNewConstMetric(c.openFDs, GaugeValue, float64(handles)) + ch <- MustNewConstMetric(c.maxFDs, GaugeValue, float64(16*1024*1024)) // Windows has a hard-coded max limit, not per-process. +} + +func fileTimeToSeconds(ft windows.Filetime) float64 { + return float64(uint64(ft.HighDateTime)<<32+uint64(ft.LowDateTime)) / 1e7 +} diff --git a/vendor/github.com/prometheus/client_golang/prometheus/promhttp/delegator.go b/vendor/github.com/prometheus/client_golang/prometheus/promhttp/delegator.go new file mode 100644 index 00000000..5070e72e --- /dev/null +++ b/vendor/github.com/prometheus/client_golang/prometheus/promhttp/delegator.go @@ -0,0 +1,370 @@ +// Copyright 2017 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package promhttp + +import ( + "bufio" + "io" + "net" + "net/http" +) + +const ( + closeNotifier = 1 << iota + flusher + hijacker + readerFrom + pusher +) + +type delegator interface { + http.ResponseWriter + + Status() int + Written() int64 +} + +type responseWriterDelegator struct { + http.ResponseWriter + + status int + written int64 + wroteHeader bool + observeWriteHeader func(int) +} + +func (r *responseWriterDelegator) Status() int { + return r.status +} + +func (r *responseWriterDelegator) Written() int64 { + return r.written +} + +func (r *responseWriterDelegator) WriteHeader(code int) { + if r.observeWriteHeader != nil && !r.wroteHeader { + // Only call observeWriteHeader for the 1st time. It's a bug if + // WriteHeader is called more than once, but we want to protect + // against it here. Note that we still delegate the WriteHeader + // to the original ResponseWriter to not mask the bug from it. + r.observeWriteHeader(code) + } + r.status = code + r.wroteHeader = true + r.ResponseWriter.WriteHeader(code) +} + +func (r *responseWriterDelegator) Write(b []byte) (int, error) { + // If applicable, call WriteHeader here so that observeWriteHeader is + // handled appropriately. + if !r.wroteHeader { + r.WriteHeader(http.StatusOK) + } + n, err := r.ResponseWriter.Write(b) + r.written += int64(n) + return n, err +} + +type closeNotifierDelegator struct{ *responseWriterDelegator } +type flusherDelegator struct{ *responseWriterDelegator } +type hijackerDelegator struct{ *responseWriterDelegator } +type readerFromDelegator struct{ *responseWriterDelegator } +type pusherDelegator struct{ *responseWriterDelegator } + +func (d closeNotifierDelegator) CloseNotify() <-chan bool { + //lint:ignore SA1019 http.CloseNotifier is deprecated but we don't want to + //remove support from client_golang yet. + return d.ResponseWriter.(http.CloseNotifier).CloseNotify() +} +func (d flusherDelegator) Flush() { + // If applicable, call WriteHeader here so that observeWriteHeader is + // handled appropriately. + if !d.wroteHeader { + d.WriteHeader(http.StatusOK) + } + d.ResponseWriter.(http.Flusher).Flush() +} +func (d hijackerDelegator) Hijack() (net.Conn, *bufio.ReadWriter, error) { + return d.ResponseWriter.(http.Hijacker).Hijack() +} +func (d readerFromDelegator) ReadFrom(re io.Reader) (int64, error) { + // If applicable, call WriteHeader here so that observeWriteHeader is + // handled appropriately. + if !d.wroteHeader { + d.WriteHeader(http.StatusOK) + } + n, err := d.ResponseWriter.(io.ReaderFrom).ReadFrom(re) + d.written += n + return n, err +} +func (d pusherDelegator) Push(target string, opts *http.PushOptions) error { + return d.ResponseWriter.(http.Pusher).Push(target, opts) +} + +var pickDelegator = make([]func(*responseWriterDelegator) delegator, 32) + +func init() { + // TODO(beorn7): Code generation would help here. + pickDelegator[0] = func(d *responseWriterDelegator) delegator { // 0 + return d + } + pickDelegator[closeNotifier] = func(d *responseWriterDelegator) delegator { // 1 + return closeNotifierDelegator{d} + } + pickDelegator[flusher] = func(d *responseWriterDelegator) delegator { // 2 + return flusherDelegator{d} + } + pickDelegator[flusher+closeNotifier] = func(d *responseWriterDelegator) delegator { // 3 + return struct { + *responseWriterDelegator + http.Flusher + http.CloseNotifier + }{d, flusherDelegator{d}, closeNotifierDelegator{d}} + } + pickDelegator[hijacker] = func(d *responseWriterDelegator) delegator { // 4 + return hijackerDelegator{d} + } + pickDelegator[hijacker+closeNotifier] = func(d *responseWriterDelegator) delegator { // 5 + return struct { + *responseWriterDelegator + http.Hijacker + http.CloseNotifier + }{d, hijackerDelegator{d}, closeNotifierDelegator{d}} + } + pickDelegator[hijacker+flusher] = func(d *responseWriterDelegator) delegator { // 6 + return struct { + *responseWriterDelegator + http.Hijacker + http.Flusher + }{d, hijackerDelegator{d}, flusherDelegator{d}} + } + pickDelegator[hijacker+flusher+closeNotifier] = func(d *responseWriterDelegator) delegator { // 7 + return struct { + *responseWriterDelegator + http.Hijacker + http.Flusher + http.CloseNotifier + }{d, hijackerDelegator{d}, flusherDelegator{d}, closeNotifierDelegator{d}} + } + pickDelegator[readerFrom] = func(d *responseWriterDelegator) delegator { // 8 + return readerFromDelegator{d} + } + pickDelegator[readerFrom+closeNotifier] = func(d *responseWriterDelegator) delegator { // 9 + return struct { + *responseWriterDelegator + io.ReaderFrom + http.CloseNotifier + }{d, readerFromDelegator{d}, closeNotifierDelegator{d}} + } + pickDelegator[readerFrom+flusher] = func(d *responseWriterDelegator) delegator { // 10 + return struct { + *responseWriterDelegator + io.ReaderFrom + http.Flusher + }{d, readerFromDelegator{d}, flusherDelegator{d}} + } + pickDelegator[readerFrom+flusher+closeNotifier] = func(d *responseWriterDelegator) delegator { // 11 + return struct { + *responseWriterDelegator + io.ReaderFrom + http.Flusher + http.CloseNotifier + }{d, readerFromDelegator{d}, flusherDelegator{d}, closeNotifierDelegator{d}} + } + pickDelegator[readerFrom+hijacker] = func(d *responseWriterDelegator) delegator { // 12 + return struct { + *responseWriterDelegator + io.ReaderFrom + http.Hijacker + }{d, readerFromDelegator{d}, hijackerDelegator{d}} + } + pickDelegator[readerFrom+hijacker+closeNotifier] = func(d *responseWriterDelegator) delegator { // 13 + return struct { + *responseWriterDelegator + io.ReaderFrom + http.Hijacker + http.CloseNotifier + }{d, readerFromDelegator{d}, hijackerDelegator{d}, closeNotifierDelegator{d}} + } + pickDelegator[readerFrom+hijacker+flusher] = func(d *responseWriterDelegator) delegator { // 14 + return struct { + *responseWriterDelegator + io.ReaderFrom + http.Hijacker + http.Flusher + }{d, readerFromDelegator{d}, hijackerDelegator{d}, flusherDelegator{d}} + } + pickDelegator[readerFrom+hijacker+flusher+closeNotifier] = func(d *responseWriterDelegator) delegator { // 15 + return struct { + *responseWriterDelegator + io.ReaderFrom + http.Hijacker + http.Flusher + http.CloseNotifier + }{d, readerFromDelegator{d}, hijackerDelegator{d}, flusherDelegator{d}, closeNotifierDelegator{d}} + } + pickDelegator[pusher] = func(d *responseWriterDelegator) delegator { // 16 + return pusherDelegator{d} + } + pickDelegator[pusher+closeNotifier] = func(d *responseWriterDelegator) delegator { // 17 + return struct { + *responseWriterDelegator + http.Pusher + http.CloseNotifier + }{d, pusherDelegator{d}, closeNotifierDelegator{d}} + } + pickDelegator[pusher+flusher] = func(d *responseWriterDelegator) delegator { // 18 + return struct { + *responseWriterDelegator + http.Pusher + http.Flusher + }{d, pusherDelegator{d}, flusherDelegator{d}} + } + pickDelegator[pusher+flusher+closeNotifier] = func(d *responseWriterDelegator) delegator { // 19 + return struct { + *responseWriterDelegator + http.Pusher + http.Flusher + http.CloseNotifier + }{d, pusherDelegator{d}, flusherDelegator{d}, closeNotifierDelegator{d}} + } + pickDelegator[pusher+hijacker] = func(d *responseWriterDelegator) delegator { // 20 + return struct { + *responseWriterDelegator + http.Pusher + http.Hijacker + }{d, pusherDelegator{d}, hijackerDelegator{d}} + } + pickDelegator[pusher+hijacker+closeNotifier] = func(d *responseWriterDelegator) delegator { // 21 + return struct { + *responseWriterDelegator + http.Pusher + http.Hijacker + http.CloseNotifier + }{d, pusherDelegator{d}, hijackerDelegator{d}, closeNotifierDelegator{d}} + } + pickDelegator[pusher+hijacker+flusher] = func(d *responseWriterDelegator) delegator { // 22 + return struct { + *responseWriterDelegator + http.Pusher + http.Hijacker + http.Flusher + }{d, pusherDelegator{d}, hijackerDelegator{d}, flusherDelegator{d}} + } + pickDelegator[pusher+hijacker+flusher+closeNotifier] = func(d *responseWriterDelegator) delegator { //23 + return struct { + *responseWriterDelegator + http.Pusher + http.Hijacker + http.Flusher + http.CloseNotifier + }{d, pusherDelegator{d}, hijackerDelegator{d}, flusherDelegator{d}, closeNotifierDelegator{d}} + } + pickDelegator[pusher+readerFrom] = func(d *responseWriterDelegator) delegator { // 24 + return struct { + *responseWriterDelegator + http.Pusher + io.ReaderFrom + }{d, pusherDelegator{d}, readerFromDelegator{d}} + } + pickDelegator[pusher+readerFrom+closeNotifier] = func(d *responseWriterDelegator) delegator { // 25 + return struct { + *responseWriterDelegator + http.Pusher + io.ReaderFrom + http.CloseNotifier + }{d, pusherDelegator{d}, readerFromDelegator{d}, closeNotifierDelegator{d}} + } + pickDelegator[pusher+readerFrom+flusher] = func(d *responseWriterDelegator) delegator { // 26 + return struct { + *responseWriterDelegator + http.Pusher + io.ReaderFrom + http.Flusher + }{d, pusherDelegator{d}, readerFromDelegator{d}, flusherDelegator{d}} + } + pickDelegator[pusher+readerFrom+flusher+closeNotifier] = func(d *responseWriterDelegator) delegator { // 27 + return struct { + *responseWriterDelegator + http.Pusher + io.ReaderFrom + http.Flusher + http.CloseNotifier + }{d, pusherDelegator{d}, readerFromDelegator{d}, flusherDelegator{d}, closeNotifierDelegator{d}} + } + pickDelegator[pusher+readerFrom+hijacker] = func(d *responseWriterDelegator) delegator { // 28 + return struct { + *responseWriterDelegator + http.Pusher + io.ReaderFrom + http.Hijacker + }{d, pusherDelegator{d}, readerFromDelegator{d}, hijackerDelegator{d}} + } + pickDelegator[pusher+readerFrom+hijacker+closeNotifier] = func(d *responseWriterDelegator) delegator { // 29 + return struct { + *responseWriterDelegator + http.Pusher + io.ReaderFrom + http.Hijacker + http.CloseNotifier + }{d, pusherDelegator{d}, readerFromDelegator{d}, hijackerDelegator{d}, closeNotifierDelegator{d}} + } + pickDelegator[pusher+readerFrom+hijacker+flusher] = func(d *responseWriterDelegator) delegator { // 30 + return struct { + *responseWriterDelegator + http.Pusher + io.ReaderFrom + http.Hijacker + http.Flusher + }{d, pusherDelegator{d}, readerFromDelegator{d}, hijackerDelegator{d}, flusherDelegator{d}} + } + pickDelegator[pusher+readerFrom+hijacker+flusher+closeNotifier] = func(d *responseWriterDelegator) delegator { // 31 + return struct { + *responseWriterDelegator + http.Pusher + io.ReaderFrom + http.Hijacker + http.Flusher + http.CloseNotifier + }{d, pusherDelegator{d}, readerFromDelegator{d}, hijackerDelegator{d}, flusherDelegator{d}, closeNotifierDelegator{d}} + } +} + +func newDelegator(w http.ResponseWriter, observeWriteHeaderFunc func(int)) delegator { + d := &responseWriterDelegator{ + ResponseWriter: w, + observeWriteHeader: observeWriteHeaderFunc, + } + + id := 0 + //lint:ignore SA1019 http.CloseNotifier is deprecated but we don't want to + //remove support from client_golang yet. + if _, ok := w.(http.CloseNotifier); ok { + id += closeNotifier + } + if _, ok := w.(http.Flusher); ok { + id += flusher + } + if _, ok := w.(http.Hijacker); ok { + id += hijacker + } + if _, ok := w.(io.ReaderFrom); ok { + id += readerFrom + } + if _, ok := w.(http.Pusher); ok { + id += pusher + } + + return pickDelegator[id](d) +} diff --git a/vendor/github.com/prometheus/client_golang/prometheus/promhttp/http.go b/vendor/github.com/prometheus/client_golang/prometheus/promhttp/http.go new file mode 100644 index 00000000..5e1c4546 --- /dev/null +++ b/vendor/github.com/prometheus/client_golang/prometheus/promhttp/http.go @@ -0,0 +1,379 @@ +// Copyright 2016 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +// Package promhttp provides tooling around HTTP servers and clients. +// +// First, the package allows the creation of http.Handler instances to expose +// Prometheus metrics via HTTP. promhttp.Handler acts on the +// prometheus.DefaultGatherer. With HandlerFor, you can create a handler for a +// custom registry or anything that implements the Gatherer interface. It also +// allows the creation of handlers that act differently on errors or allow to +// log errors. +// +// Second, the package provides tooling to instrument instances of http.Handler +// via middleware. Middleware wrappers follow the naming scheme +// InstrumentHandlerX, where X describes the intended use of the middleware. +// See each function's doc comment for specific details. +// +// Finally, the package allows for an http.RoundTripper to be instrumented via +// middleware. Middleware wrappers follow the naming scheme +// InstrumentRoundTripperX, where X describes the intended use of the +// middleware. See each function's doc comment for specific details. +package promhttp + +import ( + "compress/gzip" + "fmt" + "io" + "net/http" + "strings" + "sync" + "time" + + "github.com/prometheus/common/expfmt" + + "github.com/prometheus/client_golang/prometheus" +) + +const ( + contentTypeHeader = "Content-Type" + contentEncodingHeader = "Content-Encoding" + acceptEncodingHeader = "Accept-Encoding" +) + +var gzipPool = sync.Pool{ + New: func() interface{} { + return gzip.NewWriter(nil) + }, +} + +// Handler returns an http.Handler for the prometheus.DefaultGatherer, using +// default HandlerOpts, i.e. it reports the first error as an HTTP error, it has +// no error logging, and it applies compression if requested by the client. +// +// The returned http.Handler is already instrumented using the +// InstrumentMetricHandler function and the prometheus.DefaultRegisterer. If you +// create multiple http.Handlers by separate calls of the Handler function, the +// metrics used for instrumentation will be shared between them, providing +// global scrape counts. +// +// This function is meant to cover the bulk of basic use cases. If you are doing +// anything that requires more customization (including using a non-default +// Gatherer, different instrumentation, and non-default HandlerOpts), use the +// HandlerFor function. See there for details. +func Handler() http.Handler { + return InstrumentMetricHandler( + prometheus.DefaultRegisterer, HandlerFor(prometheus.DefaultGatherer, HandlerOpts{}), + ) +} + +// HandlerFor returns an uninstrumented http.Handler for the provided +// Gatherer. The behavior of the Handler is defined by the provided +// HandlerOpts. Thus, HandlerFor is useful to create http.Handlers for custom +// Gatherers, with non-default HandlerOpts, and/or with custom (or no) +// instrumentation. Use the InstrumentMetricHandler function to apply the same +// kind of instrumentation as it is used by the Handler function. +func HandlerFor(reg prometheus.Gatherer, opts HandlerOpts) http.Handler { + var ( + inFlightSem chan struct{} + errCnt = prometheus.NewCounterVec( + prometheus.CounterOpts{ + Name: "promhttp_metric_handler_errors_total", + Help: "Total number of internal errors encountered by the promhttp metric handler.", + }, + []string{"cause"}, + ) + ) + + if opts.MaxRequestsInFlight > 0 { + inFlightSem = make(chan struct{}, opts.MaxRequestsInFlight) + } + if opts.Registry != nil { + // Initialize all possibilites that can occur below. + errCnt.WithLabelValues("gathering") + errCnt.WithLabelValues("encoding") + if err := opts.Registry.Register(errCnt); err != nil { + if are, ok := err.(prometheus.AlreadyRegisteredError); ok { + errCnt = are.ExistingCollector.(*prometheus.CounterVec) + } else { + panic(err) + } + } + } + + h := http.HandlerFunc(func(rsp http.ResponseWriter, req *http.Request) { + if inFlightSem != nil { + select { + case inFlightSem <- struct{}{}: // All good, carry on. + defer func() { <-inFlightSem }() + default: + http.Error(rsp, fmt.Sprintf( + "Limit of concurrent requests reached (%d), try again later.", opts.MaxRequestsInFlight, + ), http.StatusServiceUnavailable) + return + } + } + mfs, err := reg.Gather() + if err != nil { + if opts.ErrorLog != nil { + opts.ErrorLog.Println("error gathering metrics:", err) + } + errCnt.WithLabelValues("gathering").Inc() + switch opts.ErrorHandling { + case PanicOnError: + panic(err) + case ContinueOnError: + if len(mfs) == 0 { + // Still report the error if no metrics have been gathered. + httpError(rsp, err) + return + } + case HTTPErrorOnError: + httpError(rsp, err) + return + } + } + + var contentType expfmt.Format + if opts.EnableOpenMetrics { + contentType = expfmt.NegotiateIncludingOpenMetrics(req.Header) + } else { + contentType = expfmt.Negotiate(req.Header) + } + header := rsp.Header() + header.Set(contentTypeHeader, string(contentType)) + + w := io.Writer(rsp) + if !opts.DisableCompression && gzipAccepted(req.Header) { + header.Set(contentEncodingHeader, "gzip") + gz := gzipPool.Get().(*gzip.Writer) + defer gzipPool.Put(gz) + + gz.Reset(w) + defer gz.Close() + + w = gz + } + + enc := expfmt.NewEncoder(w, contentType) + + // handleError handles the error according to opts.ErrorHandling + // and returns true if we have to abort after the handling. + handleError := func(err error) bool { + if err == nil { + return false + } + if opts.ErrorLog != nil { + opts.ErrorLog.Println("error encoding and sending metric family:", err) + } + errCnt.WithLabelValues("encoding").Inc() + switch opts.ErrorHandling { + case PanicOnError: + panic(err) + case HTTPErrorOnError: + // We cannot really send an HTTP error at this + // point because we most likely have written + // something to rsp already. But at least we can + // stop sending. + return true + } + // Do nothing in all other cases, including ContinueOnError. + return false + } + + for _, mf := range mfs { + if handleError(enc.Encode(mf)) { + return + } + } + if closer, ok := enc.(expfmt.Closer); ok { + // This in particular takes care of the final "# EOF\n" line for OpenMetrics. + if handleError(closer.Close()) { + return + } + } + }) + + if opts.Timeout <= 0 { + return h + } + return http.TimeoutHandler(h, opts.Timeout, fmt.Sprintf( + "Exceeded configured timeout of %v.\n", + opts.Timeout, + )) +} + +// InstrumentMetricHandler is usually used with an http.Handler returned by the +// HandlerFor function. It instruments the provided http.Handler with two +// metrics: A counter vector "promhttp_metric_handler_requests_total" to count +// scrapes partitioned by HTTP status code, and a gauge +// "promhttp_metric_handler_requests_in_flight" to track the number of +// simultaneous scrapes. This function idempotently registers collectors for +// both metrics with the provided Registerer. It panics if the registration +// fails. The provided metrics are useful to see how many scrapes hit the +// monitored target (which could be from different Prometheus servers or other +// scrapers), and how often they overlap (which would result in more than one +// scrape in flight at the same time). Note that the scrapes-in-flight gauge +// will contain the scrape by which it is exposed, while the scrape counter will +// only get incremented after the scrape is complete (as only then the status +// code is known). For tracking scrape durations, use the +// "scrape_duration_seconds" gauge created by the Prometheus server upon each +// scrape. +func InstrumentMetricHandler(reg prometheus.Registerer, handler http.Handler) http.Handler { + cnt := prometheus.NewCounterVec( + prometheus.CounterOpts{ + Name: "promhttp_metric_handler_requests_total", + Help: "Total number of scrapes by HTTP status code.", + }, + []string{"code"}, + ) + // Initialize the most likely HTTP status codes. + cnt.WithLabelValues("200") + cnt.WithLabelValues("500") + cnt.WithLabelValues("503") + if err := reg.Register(cnt); err != nil { + if are, ok := err.(prometheus.AlreadyRegisteredError); ok { + cnt = are.ExistingCollector.(*prometheus.CounterVec) + } else { + panic(err) + } + } + + gge := prometheus.NewGauge(prometheus.GaugeOpts{ + Name: "promhttp_metric_handler_requests_in_flight", + Help: "Current number of scrapes being served.", + }) + if err := reg.Register(gge); err != nil { + if are, ok := err.(prometheus.AlreadyRegisteredError); ok { + gge = are.ExistingCollector.(prometheus.Gauge) + } else { + panic(err) + } + } + + return InstrumentHandlerCounter(cnt, InstrumentHandlerInFlight(gge, handler)) +} + +// HandlerErrorHandling defines how a Handler serving metrics will handle +// errors. +type HandlerErrorHandling int + +// These constants cause handlers serving metrics to behave as described if +// errors are encountered. +const ( + // Serve an HTTP status code 500 upon the first error + // encountered. Report the error message in the body. Note that HTTP + // errors cannot be served anymore once the beginning of a regular + // payload has been sent. Thus, in the (unlikely) case that encoding the + // payload into the negotiated wire format fails, serving the response + // will simply be aborted. Set an ErrorLog in HandlerOpts to detect + // those errors. + HTTPErrorOnError HandlerErrorHandling = iota + // Ignore errors and try to serve as many metrics as possible. However, + // if no metrics can be served, serve an HTTP status code 500 and the + // last error message in the body. Only use this in deliberate "best + // effort" metrics collection scenarios. In this case, it is highly + // recommended to provide other means of detecting errors: By setting an + // ErrorLog in HandlerOpts, the errors are logged. By providing a + // Registry in HandlerOpts, the exposed metrics include an error counter + // "promhttp_metric_handler_errors_total", which can be used for + // alerts. + ContinueOnError + // Panic upon the first error encountered (useful for "crash only" apps). + PanicOnError +) + +// Logger is the minimal interface HandlerOpts needs for logging. Note that +// log.Logger from the standard library implements this interface, and it is +// easy to implement by custom loggers, if they don't do so already anyway. +type Logger interface { + Println(v ...interface{}) +} + +// HandlerOpts specifies options how to serve metrics via an http.Handler. The +// zero value of HandlerOpts is a reasonable default. +type HandlerOpts struct { + // ErrorLog specifies an optional logger for errors collecting and + // serving metrics. If nil, errors are not logged at all. + ErrorLog Logger + // ErrorHandling defines how errors are handled. Note that errors are + // logged regardless of the configured ErrorHandling provided ErrorLog + // is not nil. + ErrorHandling HandlerErrorHandling + // If Registry is not nil, it is used to register a metric + // "promhttp_metric_handler_errors_total", partitioned by "cause". A + // failed registration causes a panic. Note that this error counter is + // different from the instrumentation you get from the various + // InstrumentHandler... helpers. It counts errors that don't necessarily + // result in a non-2xx HTTP status code. There are two typical cases: + // (1) Encoding errors that only happen after streaming of the HTTP body + // has already started (and the status code 200 has been sent). This + // should only happen with custom collectors. (2) Collection errors with + // no effect on the HTTP status code because ErrorHandling is set to + // ContinueOnError. + Registry prometheus.Registerer + // If DisableCompression is true, the handler will never compress the + // response, even if requested by the client. + DisableCompression bool + // The number of concurrent HTTP requests is limited to + // MaxRequestsInFlight. Additional requests are responded to with 503 + // Service Unavailable and a suitable message in the body. If + // MaxRequestsInFlight is 0 or negative, no limit is applied. + MaxRequestsInFlight int + // If handling a request takes longer than Timeout, it is responded to + // with 503 ServiceUnavailable and a suitable Message. No timeout is + // applied if Timeout is 0 or negative. Note that with the current + // implementation, reaching the timeout simply ends the HTTP requests as + // described above (and even that only if sending of the body hasn't + // started yet), while the bulk work of gathering all the metrics keeps + // running in the background (with the eventual result to be thrown + // away). Until the implementation is improved, it is recommended to + // implement a separate timeout in potentially slow Collectors. + Timeout time.Duration + // If true, the experimental OpenMetrics encoding is added to the + // possible options during content negotiation. Note that Prometheus + // 2.5.0+ will negotiate OpenMetrics as first priority. OpenMetrics is + // the only way to transmit exemplars. However, the move to OpenMetrics + // is not completely transparent. Most notably, the values of "quantile" + // labels of Summaries and "le" labels of Histograms are formatted with + // a trailing ".0" if they would otherwise look like integer numbers + // (which changes the identity of the resulting series on the Prometheus + // server). + EnableOpenMetrics bool +} + +// gzipAccepted returns whether the client will accept gzip-encoded content. +func gzipAccepted(header http.Header) bool { + a := header.Get(acceptEncodingHeader) + parts := strings.Split(a, ",") + for _, part := range parts { + part = strings.TrimSpace(part) + if part == "gzip" || strings.HasPrefix(part, "gzip;") { + return true + } + } + return false +} + +// httpError removes any content-encoding header and then calls http.Error with +// the provided error and http.StatusInternalServerError. Error contents is +// supposed to be uncompressed plain text. Same as with a plain http.Error, this +// must not be called if the header or any payload has already been sent. +func httpError(rsp http.ResponseWriter, err error) { + rsp.Header().Del(contentEncodingHeader) + http.Error( + rsp, + "An error has occurred while serving metrics:\n\n"+err.Error(), + http.StatusInternalServerError, + ) +} diff --git a/vendor/github.com/prometheus/client_golang/prometheus/promhttp/instrument_client.go b/vendor/github.com/prometheus/client_golang/prometheus/promhttp/instrument_client.go new file mode 100644 index 00000000..83c49b66 --- /dev/null +++ b/vendor/github.com/prometheus/client_golang/prometheus/promhttp/instrument_client.go @@ -0,0 +1,219 @@ +// Copyright 2017 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package promhttp + +import ( + "crypto/tls" + "net/http" + "net/http/httptrace" + "time" + + "github.com/prometheus/client_golang/prometheus" +) + +// The RoundTripperFunc type is an adapter to allow the use of ordinary +// functions as RoundTrippers. If f is a function with the appropriate +// signature, RountTripperFunc(f) is a RoundTripper that calls f. +type RoundTripperFunc func(req *http.Request) (*http.Response, error) + +// RoundTrip implements the RoundTripper interface. +func (rt RoundTripperFunc) RoundTrip(r *http.Request) (*http.Response, error) { + return rt(r) +} + +// InstrumentRoundTripperInFlight is a middleware that wraps the provided +// http.RoundTripper. It sets the provided prometheus.Gauge to the number of +// requests currently handled by the wrapped http.RoundTripper. +// +// See the example for ExampleInstrumentRoundTripperDuration for example usage. +func InstrumentRoundTripperInFlight(gauge prometheus.Gauge, next http.RoundTripper) RoundTripperFunc { + return RoundTripperFunc(func(r *http.Request) (*http.Response, error) { + gauge.Inc() + defer gauge.Dec() + return next.RoundTrip(r) + }) +} + +// InstrumentRoundTripperCounter is a middleware that wraps the provided +// http.RoundTripper to observe the request result with the provided CounterVec. +// The CounterVec must have zero, one, or two non-const non-curried labels. For +// those, the only allowed label names are "code" and "method". The function +// panics otherwise. Partitioning of the CounterVec happens by HTTP status code +// and/or HTTP method if the respective instance label names are present in the +// CounterVec. For unpartitioned counting, use a CounterVec with zero labels. +// +// If the wrapped RoundTripper panics or returns a non-nil error, the Counter +// is not incremented. +// +// See the example for ExampleInstrumentRoundTripperDuration for example usage. +func InstrumentRoundTripperCounter(counter *prometheus.CounterVec, next http.RoundTripper) RoundTripperFunc { + code, method := checkLabels(counter) + + return RoundTripperFunc(func(r *http.Request) (*http.Response, error) { + resp, err := next.RoundTrip(r) + if err == nil { + counter.With(labels(code, method, r.Method, resp.StatusCode)).Inc() + } + return resp, err + }) +} + +// InstrumentRoundTripperDuration is a middleware that wraps the provided +// http.RoundTripper to observe the request duration with the provided +// ObserverVec. The ObserverVec must have zero, one, or two non-const +// non-curried labels. For those, the only allowed label names are "code" and +// "method". The function panics otherwise. The Observe method of the Observer +// in the ObserverVec is called with the request duration in +// seconds. Partitioning happens by HTTP status code and/or HTTP method if the +// respective instance label names are present in the ObserverVec. For +// unpartitioned observations, use an ObserverVec with zero labels. Note that +// partitioning of Histograms is expensive and should be used judiciously. +// +// If the wrapped RoundTripper panics or returns a non-nil error, no values are +// reported. +// +// Note that this method is only guaranteed to never observe negative durations +// if used with Go1.9+. +func InstrumentRoundTripperDuration(obs prometheus.ObserverVec, next http.RoundTripper) RoundTripperFunc { + code, method := checkLabels(obs) + + return RoundTripperFunc(func(r *http.Request) (*http.Response, error) { + start := time.Now() + resp, err := next.RoundTrip(r) + if err == nil { + obs.With(labels(code, method, r.Method, resp.StatusCode)).Observe(time.Since(start).Seconds()) + } + return resp, err + }) +} + +// InstrumentTrace is used to offer flexibility in instrumenting the available +// httptrace.ClientTrace hook functions. Each function is passed a float64 +// representing the time in seconds since the start of the http request. A user +// may choose to use separately buckets Histograms, or implement custom +// instance labels on a per function basis. +type InstrumentTrace struct { + GotConn func(float64) + PutIdleConn func(float64) + GotFirstResponseByte func(float64) + Got100Continue func(float64) + DNSStart func(float64) + DNSDone func(float64) + ConnectStart func(float64) + ConnectDone func(float64) + TLSHandshakeStart func(float64) + TLSHandshakeDone func(float64) + WroteHeaders func(float64) + Wait100Continue func(float64) + WroteRequest func(float64) +} + +// InstrumentRoundTripperTrace is a middleware that wraps the provided +// RoundTripper and reports times to hook functions provided in the +// InstrumentTrace struct. Hook functions that are not present in the provided +// InstrumentTrace struct are ignored. Times reported to the hook functions are +// time since the start of the request. Only with Go1.9+, those times are +// guaranteed to never be negative. (Earlier Go versions are not using a +// monotonic clock.) Note that partitioning of Histograms is expensive and +// should be used judiciously. +// +// For hook functions that receive an error as an argument, no observations are +// made in the event of a non-nil error value. +// +// See the example for ExampleInstrumentRoundTripperDuration for example usage. +func InstrumentRoundTripperTrace(it *InstrumentTrace, next http.RoundTripper) RoundTripperFunc { + return RoundTripperFunc(func(r *http.Request) (*http.Response, error) { + start := time.Now() + + trace := &httptrace.ClientTrace{ + GotConn: func(_ httptrace.GotConnInfo) { + if it.GotConn != nil { + it.GotConn(time.Since(start).Seconds()) + } + }, + PutIdleConn: func(err error) { + if err != nil { + return + } + if it.PutIdleConn != nil { + it.PutIdleConn(time.Since(start).Seconds()) + } + }, + DNSStart: func(_ httptrace.DNSStartInfo) { + if it.DNSStart != nil { + it.DNSStart(time.Since(start).Seconds()) + } + }, + DNSDone: func(_ httptrace.DNSDoneInfo) { + if it.DNSDone != nil { + it.DNSDone(time.Since(start).Seconds()) + } + }, + ConnectStart: func(_, _ string) { + if it.ConnectStart != nil { + it.ConnectStart(time.Since(start).Seconds()) + } + }, + ConnectDone: func(_, _ string, err error) { + if err != nil { + return + } + if it.ConnectDone != nil { + it.ConnectDone(time.Since(start).Seconds()) + } + }, + GotFirstResponseByte: func() { + if it.GotFirstResponseByte != nil { + it.GotFirstResponseByte(time.Since(start).Seconds()) + } + }, + Got100Continue: func() { + if it.Got100Continue != nil { + it.Got100Continue(time.Since(start).Seconds()) + } + }, + TLSHandshakeStart: func() { + if it.TLSHandshakeStart != nil { + it.TLSHandshakeStart(time.Since(start).Seconds()) + } + }, + TLSHandshakeDone: func(_ tls.ConnectionState, err error) { + if err != nil { + return + } + if it.TLSHandshakeDone != nil { + it.TLSHandshakeDone(time.Since(start).Seconds()) + } + }, + WroteHeaders: func() { + if it.WroteHeaders != nil { + it.WroteHeaders(time.Since(start).Seconds()) + } + }, + Wait100Continue: func() { + if it.Wait100Continue != nil { + it.Wait100Continue(time.Since(start).Seconds()) + } + }, + WroteRequest: func(_ httptrace.WroteRequestInfo) { + if it.WroteRequest != nil { + it.WroteRequest(time.Since(start).Seconds()) + } + }, + } + r = r.WithContext(httptrace.WithClientTrace(r.Context(), trace)) + + return next.RoundTrip(r) + }) +} diff --git a/vendor/github.com/prometheus/client_golang/prometheus/promhttp/instrument_server.go b/vendor/github.com/prometheus/client_golang/prometheus/promhttp/instrument_server.go new file mode 100644 index 00000000..9db24380 --- /dev/null +++ b/vendor/github.com/prometheus/client_golang/prometheus/promhttp/instrument_server.go @@ -0,0 +1,447 @@ +// Copyright 2017 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package promhttp + +import ( + "errors" + "net/http" + "strconv" + "strings" + "time" + + dto "github.com/prometheus/client_model/go" + + "github.com/prometheus/client_golang/prometheus" +) + +// magicString is used for the hacky label test in checkLabels. Remove once fixed. +const magicString = "zZgWfBxLqvG8kc8IMv3POi2Bb0tZI3vAnBx+gBaFi9FyPzB/CzKUer1yufDa" + +// InstrumentHandlerInFlight is a middleware that wraps the provided +// http.Handler. It sets the provided prometheus.Gauge to the number of +// requests currently handled by the wrapped http.Handler. +// +// See the example for InstrumentHandlerDuration for example usage. +func InstrumentHandlerInFlight(g prometheus.Gauge, next http.Handler) http.Handler { + return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { + g.Inc() + defer g.Dec() + next.ServeHTTP(w, r) + }) +} + +// InstrumentHandlerDuration is a middleware that wraps the provided +// http.Handler to observe the request duration with the provided ObserverVec. +// The ObserverVec must have zero, one, or two non-const non-curried labels. For +// those, the only allowed label names are "code" and "method". The function +// panics otherwise. The Observe method of the Observer in the ObserverVec is +// called with the request duration in seconds. Partitioning happens by HTTP +// status code and/or HTTP method if the respective instance label names are +// present in the ObserverVec. For unpartitioned observations, use an +// ObserverVec with zero labels. Note that partitioning of Histograms is +// expensive and should be used judiciously. +// +// If the wrapped Handler does not set a status code, a status code of 200 is assumed. +// +// If the wrapped Handler panics, no values are reported. +// +// Note that this method is only guaranteed to never observe negative durations +// if used with Go1.9+. +func InstrumentHandlerDuration(obs prometheus.ObserverVec, next http.Handler) http.HandlerFunc { + code, method := checkLabels(obs) + + if code { + return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { + now := time.Now() + d := newDelegator(w, nil) + next.ServeHTTP(d, r) + + obs.With(labels(code, method, r.Method, d.Status())).Observe(time.Since(now).Seconds()) + }) + } + + return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { + now := time.Now() + next.ServeHTTP(w, r) + obs.With(labels(code, method, r.Method, 0)).Observe(time.Since(now).Seconds()) + }) +} + +// InstrumentHandlerCounter is a middleware that wraps the provided http.Handler +// to observe the request result with the provided CounterVec. The CounterVec +// must have zero, one, or two non-const non-curried labels. For those, the only +// allowed label names are "code" and "method". The function panics +// otherwise. Partitioning of the CounterVec happens by HTTP status code and/or +// HTTP method if the respective instance label names are present in the +// CounterVec. For unpartitioned counting, use a CounterVec with zero labels. +// +// If the wrapped Handler does not set a status code, a status code of 200 is assumed. +// +// If the wrapped Handler panics, the Counter is not incremented. +// +// See the example for InstrumentHandlerDuration for example usage. +func InstrumentHandlerCounter(counter *prometheus.CounterVec, next http.Handler) http.HandlerFunc { + code, method := checkLabels(counter) + + if code { + return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { + d := newDelegator(w, nil) + next.ServeHTTP(d, r) + counter.With(labels(code, method, r.Method, d.Status())).Inc() + }) + } + + return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { + next.ServeHTTP(w, r) + counter.With(labels(code, method, r.Method, 0)).Inc() + }) +} + +// InstrumentHandlerTimeToWriteHeader is a middleware that wraps the provided +// http.Handler to observe with the provided ObserverVec the request duration +// until the response headers are written. The ObserverVec must have zero, one, +// or two non-const non-curried labels. For those, the only allowed label names +// are "code" and "method". The function panics otherwise. The Observe method of +// the Observer in the ObserverVec is called with the request duration in +// seconds. Partitioning happens by HTTP status code and/or HTTP method if the +// respective instance label names are present in the ObserverVec. For +// unpartitioned observations, use an ObserverVec with zero labels. Note that +// partitioning of Histograms is expensive and should be used judiciously. +// +// If the wrapped Handler panics before calling WriteHeader, no value is +// reported. +// +// Note that this method is only guaranteed to never observe negative durations +// if used with Go1.9+. +// +// See the example for InstrumentHandlerDuration for example usage. +func InstrumentHandlerTimeToWriteHeader(obs prometheus.ObserverVec, next http.Handler) http.HandlerFunc { + code, method := checkLabels(obs) + + return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { + now := time.Now() + d := newDelegator(w, func(status int) { + obs.With(labels(code, method, r.Method, status)).Observe(time.Since(now).Seconds()) + }) + next.ServeHTTP(d, r) + }) +} + +// InstrumentHandlerRequestSize is a middleware that wraps the provided +// http.Handler to observe the request size with the provided ObserverVec. The +// ObserverVec must have zero, one, or two non-const non-curried labels. For +// those, the only allowed label names are "code" and "method". The function +// panics otherwise. The Observe method of the Observer in the ObserverVec is +// called with the request size in bytes. Partitioning happens by HTTP status +// code and/or HTTP method if the respective instance label names are present in +// the ObserverVec. For unpartitioned observations, use an ObserverVec with zero +// labels. Note that partitioning of Histograms is expensive and should be used +// judiciously. +// +// If the wrapped Handler does not set a status code, a status code of 200 is assumed. +// +// If the wrapped Handler panics, no values are reported. +// +// See the example for InstrumentHandlerDuration for example usage. +func InstrumentHandlerRequestSize(obs prometheus.ObserverVec, next http.Handler) http.HandlerFunc { + code, method := checkLabels(obs) + + if code { + return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { + d := newDelegator(w, nil) + next.ServeHTTP(d, r) + size := computeApproximateRequestSize(r) + obs.With(labels(code, method, r.Method, d.Status())).Observe(float64(size)) + }) + } + + return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { + next.ServeHTTP(w, r) + size := computeApproximateRequestSize(r) + obs.With(labels(code, method, r.Method, 0)).Observe(float64(size)) + }) +} + +// InstrumentHandlerResponseSize is a middleware that wraps the provided +// http.Handler to observe the response size with the provided ObserverVec. The +// ObserverVec must have zero, one, or two non-const non-curried labels. For +// those, the only allowed label names are "code" and "method". The function +// panics otherwise. The Observe method of the Observer in the ObserverVec is +// called with the response size in bytes. Partitioning happens by HTTP status +// code and/or HTTP method if the respective instance label names are present in +// the ObserverVec. For unpartitioned observations, use an ObserverVec with zero +// labels. Note that partitioning of Histograms is expensive and should be used +// judiciously. +// +// If the wrapped Handler does not set a status code, a status code of 200 is assumed. +// +// If the wrapped Handler panics, no values are reported. +// +// See the example for InstrumentHandlerDuration for example usage. +func InstrumentHandlerResponseSize(obs prometheus.ObserverVec, next http.Handler) http.Handler { + code, method := checkLabels(obs) + return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { + d := newDelegator(w, nil) + next.ServeHTTP(d, r) + obs.With(labels(code, method, r.Method, d.Status())).Observe(float64(d.Written())) + }) +} + +func checkLabels(c prometheus.Collector) (code bool, method bool) { + // TODO(beorn7): Remove this hacky way to check for instance labels + // once Descriptors can have their dimensionality queried. + var ( + desc *prometheus.Desc + m prometheus.Metric + pm dto.Metric + lvs []string + ) + + // Get the Desc from the Collector. + descc := make(chan *prometheus.Desc, 1) + c.Describe(descc) + + select { + case desc = <-descc: + default: + panic("no description provided by collector") + } + select { + case <-descc: + panic("more than one description provided by collector") + default: + } + + close(descc) + + // Create a ConstMetric with the Desc. Since we don't know how many + // variable labels there are, try for as long as it needs. + for err := errors.New("dummy"); err != nil; lvs = append(lvs, magicString) { + m, err = prometheus.NewConstMetric(desc, prometheus.UntypedValue, 0, lvs...) + } + + // Write out the metric into a proto message and look at the labels. + // If the value is not the magicString, it is a constLabel, which doesn't interest us. + // If the label is curried, it doesn't interest us. + // In all other cases, only "code" or "method" is allowed. + if err := m.Write(&pm); err != nil { + panic("error checking metric for labels") + } + for _, label := range pm.Label { + name, value := label.GetName(), label.GetValue() + if value != magicString || isLabelCurried(c, name) { + continue + } + switch name { + case "code": + code = true + case "method": + method = true + default: + panic("metric partitioned with non-supported labels") + } + } + return +} + +func isLabelCurried(c prometheus.Collector, label string) bool { + // This is even hackier than the label test above. + // We essentially try to curry again and see if it works. + // But for that, we need to type-convert to the two + // types we use here, ObserverVec or *CounterVec. + switch v := c.(type) { + case *prometheus.CounterVec: + if _, err := v.CurryWith(prometheus.Labels{label: "dummy"}); err == nil { + return false + } + case prometheus.ObserverVec: + if _, err := v.CurryWith(prometheus.Labels{label: "dummy"}); err == nil { + return false + } + default: + panic("unsupported metric vec type") + } + return true +} + +// emptyLabels is a one-time allocation for non-partitioned metrics to avoid +// unnecessary allocations on each request. +var emptyLabels = prometheus.Labels{} + +func labels(code, method bool, reqMethod string, status int) prometheus.Labels { + if !(code || method) { + return emptyLabels + } + labels := prometheus.Labels{} + + if code { + labels["code"] = sanitizeCode(status) + } + if method { + labels["method"] = sanitizeMethod(reqMethod) + } + + return labels +} + +func computeApproximateRequestSize(r *http.Request) int { + s := 0 + if r.URL != nil { + s += len(r.URL.String()) + } + + s += len(r.Method) + s += len(r.Proto) + for name, values := range r.Header { + s += len(name) + for _, value := range values { + s += len(value) + } + } + s += len(r.Host) + + // N.B. r.Form and r.MultipartForm are assumed to be included in r.URL. + + if r.ContentLength != -1 { + s += int(r.ContentLength) + } + return s +} + +func sanitizeMethod(m string) string { + switch m { + case "GET", "get": + return "get" + case "PUT", "put": + return "put" + case "HEAD", "head": + return "head" + case "POST", "post": + return "post" + case "DELETE", "delete": + return "delete" + case "CONNECT", "connect": + return "connect" + case "OPTIONS", "options": + return "options" + case "NOTIFY", "notify": + return "notify" + default: + return strings.ToLower(m) + } +} + +// If the wrapped http.Handler has not set a status code, i.e. the value is +// currently 0, santizeCode will return 200, for consistency with behavior in +// the stdlib. +func sanitizeCode(s int) string { + switch s { + case 100: + return "100" + case 101: + return "101" + + case 200, 0: + return "200" + case 201: + return "201" + case 202: + return "202" + case 203: + return "203" + case 204: + return "204" + case 205: + return "205" + case 206: + return "206" + + case 300: + return "300" + case 301: + return "301" + case 302: + return "302" + case 304: + return "304" + case 305: + return "305" + case 307: + return "307" + + case 400: + return "400" + case 401: + return "401" + case 402: + return "402" + case 403: + return "403" + case 404: + return "404" + case 405: + return "405" + case 406: + return "406" + case 407: + return "407" + case 408: + return "408" + case 409: + return "409" + case 410: + return "410" + case 411: + return "411" + case 412: + return "412" + case 413: + return "413" + case 414: + return "414" + case 415: + return "415" + case 416: + return "416" + case 417: + return "417" + case 418: + return "418" + + case 500: + return "500" + case 501: + return "501" + case 502: + return "502" + case 503: + return "503" + case 504: + return "504" + case 505: + return "505" + + case 428: + return "428" + case 429: + return "429" + case 431: + return "431" + case 511: + return "511" + + default: + return strconv.Itoa(s) + } +} diff --git a/vendor/github.com/prometheus/client_golang/prometheus/registry.go b/vendor/github.com/prometheus/client_golang/prometheus/registry.go new file mode 100644 index 00000000..ba94405a --- /dev/null +++ b/vendor/github.com/prometheus/client_golang/prometheus/registry.go @@ -0,0 +1,948 @@ +// Copyright 2014 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package prometheus + +import ( + "bytes" + "fmt" + "io/ioutil" + "os" + "path/filepath" + "runtime" + "sort" + "strings" + "sync" + "unicode/utf8" + + "github.com/cespare/xxhash/v2" + //lint:ignore SA1019 Need to keep deprecated package for compatibility. + "github.com/golang/protobuf/proto" + "github.com/prometheus/common/expfmt" + + dto "github.com/prometheus/client_model/go" + + "github.com/prometheus/client_golang/prometheus/internal" +) + +const ( + // Capacity for the channel to collect metrics and descriptors. + capMetricChan = 1000 + capDescChan = 10 +) + +// DefaultRegisterer and DefaultGatherer are the implementations of the +// Registerer and Gatherer interface a number of convenience functions in this +// package act on. Initially, both variables point to the same Registry, which +// has a process collector (currently on Linux only, see NewProcessCollector) +// and a Go collector (see NewGoCollector, in particular the note about +// stop-the-world implication with Go versions older than 1.9) already +// registered. This approach to keep default instances as global state mirrors +// the approach of other packages in the Go standard library. Note that there +// are caveats. Change the variables with caution and only if you understand the +// consequences. Users who want to avoid global state altogether should not use +// the convenience functions and act on custom instances instead. +var ( + defaultRegistry = NewRegistry() + DefaultRegisterer Registerer = defaultRegistry + DefaultGatherer Gatherer = defaultRegistry +) + +func init() { + MustRegister(NewProcessCollector(ProcessCollectorOpts{})) + MustRegister(NewGoCollector()) +} + +// NewRegistry creates a new vanilla Registry without any Collectors +// pre-registered. +func NewRegistry() *Registry { + return &Registry{ + collectorsByID: map[uint64]Collector{}, + descIDs: map[uint64]struct{}{}, + dimHashesByName: map[string]uint64{}, + } +} + +// NewPedanticRegistry returns a registry that checks during collection if each +// collected Metric is consistent with its reported Desc, and if the Desc has +// actually been registered with the registry. Unchecked Collectors (those whose +// Describe method does not yield any descriptors) are excluded from the check. +// +// Usually, a Registry will be happy as long as the union of all collected +// Metrics is consistent and valid even if some metrics are not consistent with +// their own Desc or a Desc provided by their registered Collector. Well-behaved +// Collectors and Metrics will only provide consistent Descs. This Registry is +// useful to test the implementation of Collectors and Metrics. +func NewPedanticRegistry() *Registry { + r := NewRegistry() + r.pedanticChecksEnabled = true + return r +} + +// Registerer is the interface for the part of a registry in charge of +// registering and unregistering. Users of custom registries should use +// Registerer as type for registration purposes (rather than the Registry type +// directly). In that way, they are free to use custom Registerer implementation +// (e.g. for testing purposes). +type Registerer interface { + // Register registers a new Collector to be included in metrics + // collection. It returns an error if the descriptors provided by the + // Collector are invalid or if they — in combination with descriptors of + // already registered Collectors — do not fulfill the consistency and + // uniqueness criteria described in the documentation of metric.Desc. + // + // If the provided Collector is equal to a Collector already registered + // (which includes the case of re-registering the same Collector), the + // returned error is an instance of AlreadyRegisteredError, which + // contains the previously registered Collector. + // + // A Collector whose Describe method does not yield any Desc is treated + // as unchecked. Registration will always succeed. No check for + // re-registering (see previous paragraph) is performed. Thus, the + // caller is responsible for not double-registering the same unchecked + // Collector, and for providing a Collector that will not cause + // inconsistent metrics on collection. (This would lead to scrape + // errors.) + Register(Collector) error + // MustRegister works like Register but registers any number of + // Collectors and panics upon the first registration that causes an + // error. + MustRegister(...Collector) + // Unregister unregisters the Collector that equals the Collector passed + // in as an argument. (Two Collectors are considered equal if their + // Describe method yields the same set of descriptors.) The function + // returns whether a Collector was unregistered. Note that an unchecked + // Collector cannot be unregistered (as its Describe method does not + // yield any descriptor). + // + // Note that even after unregistering, it will not be possible to + // register a new Collector that is inconsistent with the unregistered + // Collector, e.g. a Collector collecting metrics with the same name but + // a different help string. The rationale here is that the same registry + // instance must only collect consistent metrics throughout its + // lifetime. + Unregister(Collector) bool +} + +// Gatherer is the interface for the part of a registry in charge of gathering +// the collected metrics into a number of MetricFamilies. The Gatherer interface +// comes with the same general implication as described for the Registerer +// interface. +type Gatherer interface { + // Gather calls the Collect method of the registered Collectors and then + // gathers the collected metrics into a lexicographically sorted slice + // of uniquely named MetricFamily protobufs. Gather ensures that the + // returned slice is valid and self-consistent so that it can be used + // for valid exposition. As an exception to the strict consistency + // requirements described for metric.Desc, Gather will tolerate + // different sets of label names for metrics of the same metric family. + // + // Even if an error occurs, Gather attempts to gather as many metrics as + // possible. Hence, if a non-nil error is returned, the returned + // MetricFamily slice could be nil (in case of a fatal error that + // prevented any meaningful metric collection) or contain a number of + // MetricFamily protobufs, some of which might be incomplete, and some + // might be missing altogether. The returned error (which might be a + // MultiError) explains the details. Note that this is mostly useful for + // debugging purposes. If the gathered protobufs are to be used for + // exposition in actual monitoring, it is almost always better to not + // expose an incomplete result and instead disregard the returned + // MetricFamily protobufs in case the returned error is non-nil. + Gather() ([]*dto.MetricFamily, error) +} + +// Register registers the provided Collector with the DefaultRegisterer. +// +// Register is a shortcut for DefaultRegisterer.Register(c). See there for more +// details. +func Register(c Collector) error { + return DefaultRegisterer.Register(c) +} + +// MustRegister registers the provided Collectors with the DefaultRegisterer and +// panics if any error occurs. +// +// MustRegister is a shortcut for DefaultRegisterer.MustRegister(cs...). See +// there for more details. +func MustRegister(cs ...Collector) { + DefaultRegisterer.MustRegister(cs...) +} + +// Unregister removes the registration of the provided Collector from the +// DefaultRegisterer. +// +// Unregister is a shortcut for DefaultRegisterer.Unregister(c). See there for +// more details. +func Unregister(c Collector) bool { + return DefaultRegisterer.Unregister(c) +} + +// GathererFunc turns a function into a Gatherer. +type GathererFunc func() ([]*dto.MetricFamily, error) + +// Gather implements Gatherer. +func (gf GathererFunc) Gather() ([]*dto.MetricFamily, error) { + return gf() +} + +// AlreadyRegisteredError is returned by the Register method if the Collector to +// be registered has already been registered before, or a different Collector +// that collects the same metrics has been registered before. Registration fails +// in that case, but you can detect from the kind of error what has +// happened. The error contains fields for the existing Collector and the +// (rejected) new Collector that equals the existing one. This can be used to +// find out if an equal Collector has been registered before and switch over to +// using the old one, as demonstrated in the example. +type AlreadyRegisteredError struct { + ExistingCollector, NewCollector Collector +} + +func (err AlreadyRegisteredError) Error() string { + return "duplicate metrics collector registration attempted" +} + +// MultiError is a slice of errors implementing the error interface. It is used +// by a Gatherer to report multiple errors during MetricFamily gathering. +type MultiError []error + +func (errs MultiError) Error() string { + if len(errs) == 0 { + return "" + } + buf := &bytes.Buffer{} + fmt.Fprintf(buf, "%d error(s) occurred:", len(errs)) + for _, err := range errs { + fmt.Fprintf(buf, "\n* %s", err) + } + return buf.String() +} + +// Append appends the provided error if it is not nil. +func (errs *MultiError) Append(err error) { + if err != nil { + *errs = append(*errs, err) + } +} + +// MaybeUnwrap returns nil if len(errs) is 0. It returns the first and only +// contained error as error if len(errs is 1). In all other cases, it returns +// the MultiError directly. This is helpful for returning a MultiError in a way +// that only uses the MultiError if needed. +func (errs MultiError) MaybeUnwrap() error { + switch len(errs) { + case 0: + return nil + case 1: + return errs[0] + default: + return errs + } +} + +// Registry registers Prometheus collectors, collects their metrics, and gathers +// them into MetricFamilies for exposition. It implements both Registerer and +// Gatherer. The zero value is not usable. Create instances with NewRegistry or +// NewPedanticRegistry. +type Registry struct { + mtx sync.RWMutex + collectorsByID map[uint64]Collector // ID is a hash of the descIDs. + descIDs map[uint64]struct{} + dimHashesByName map[string]uint64 + uncheckedCollectors []Collector + pedanticChecksEnabled bool +} + +// Register implements Registerer. +func (r *Registry) Register(c Collector) error { + var ( + descChan = make(chan *Desc, capDescChan) + newDescIDs = map[uint64]struct{}{} + newDimHashesByName = map[string]uint64{} + collectorID uint64 // All desc IDs XOR'd together. + duplicateDescErr error + ) + go func() { + c.Describe(descChan) + close(descChan) + }() + r.mtx.Lock() + defer func() { + // Drain channel in case of premature return to not leak a goroutine. + for range descChan { + } + r.mtx.Unlock() + }() + // Conduct various tests... + for desc := range descChan { + + // Is the descriptor valid at all? + if desc.err != nil { + return fmt.Errorf("descriptor %s is invalid: %s", desc, desc.err) + } + + // Is the descID unique? + // (In other words: Is the fqName + constLabel combination unique?) + if _, exists := r.descIDs[desc.id]; exists { + duplicateDescErr = fmt.Errorf("descriptor %s already exists with the same fully-qualified name and const label values", desc) + } + // If it is not a duplicate desc in this collector, XOR it to + // the collectorID. (We allow duplicate descs within the same + // collector, but their existence must be a no-op.) + if _, exists := newDescIDs[desc.id]; !exists { + newDescIDs[desc.id] = struct{}{} + collectorID ^= desc.id + } + + // Are all the label names and the help string consistent with + // previous descriptors of the same name? + // First check existing descriptors... + if dimHash, exists := r.dimHashesByName[desc.fqName]; exists { + if dimHash != desc.dimHash { + return fmt.Errorf("a previously registered descriptor with the same fully-qualified name as %s has different label names or a different help string", desc) + } + } else { + // ...then check the new descriptors already seen. + if dimHash, exists := newDimHashesByName[desc.fqName]; exists { + if dimHash != desc.dimHash { + return fmt.Errorf("descriptors reported by collector have inconsistent label names or help strings for the same fully-qualified name, offender is %s", desc) + } + } else { + newDimHashesByName[desc.fqName] = desc.dimHash + } + } + } + // A Collector yielding no Desc at all is considered unchecked. + if len(newDescIDs) == 0 { + r.uncheckedCollectors = append(r.uncheckedCollectors, c) + return nil + } + if existing, exists := r.collectorsByID[collectorID]; exists { + switch e := existing.(type) { + case *wrappingCollector: + return AlreadyRegisteredError{ + ExistingCollector: e.unwrapRecursively(), + NewCollector: c, + } + default: + return AlreadyRegisteredError{ + ExistingCollector: e, + NewCollector: c, + } + } + } + // If the collectorID is new, but at least one of the descs existed + // before, we are in trouble. + if duplicateDescErr != nil { + return duplicateDescErr + } + + // Only after all tests have passed, actually register. + r.collectorsByID[collectorID] = c + for hash := range newDescIDs { + r.descIDs[hash] = struct{}{} + } + for name, dimHash := range newDimHashesByName { + r.dimHashesByName[name] = dimHash + } + return nil +} + +// Unregister implements Registerer. +func (r *Registry) Unregister(c Collector) bool { + var ( + descChan = make(chan *Desc, capDescChan) + descIDs = map[uint64]struct{}{} + collectorID uint64 // All desc IDs XOR'd together. + ) + go func() { + c.Describe(descChan) + close(descChan) + }() + for desc := range descChan { + if _, exists := descIDs[desc.id]; !exists { + collectorID ^= desc.id + descIDs[desc.id] = struct{}{} + } + } + + r.mtx.RLock() + if _, exists := r.collectorsByID[collectorID]; !exists { + r.mtx.RUnlock() + return false + } + r.mtx.RUnlock() + + r.mtx.Lock() + defer r.mtx.Unlock() + + delete(r.collectorsByID, collectorID) + for id := range descIDs { + delete(r.descIDs, id) + } + // dimHashesByName is left untouched as those must be consistent + // throughout the lifetime of a program. + return true +} + +// MustRegister implements Registerer. +func (r *Registry) MustRegister(cs ...Collector) { + for _, c := range cs { + if err := r.Register(c); err != nil { + panic(err) + } + } +} + +// Gather implements Gatherer. +func (r *Registry) Gather() ([]*dto.MetricFamily, error) { + var ( + checkedMetricChan = make(chan Metric, capMetricChan) + uncheckedMetricChan = make(chan Metric, capMetricChan) + metricHashes = map[uint64]struct{}{} + wg sync.WaitGroup + errs MultiError // The collected errors to return in the end. + registeredDescIDs map[uint64]struct{} // Only used for pedantic checks + ) + + r.mtx.RLock() + goroutineBudget := len(r.collectorsByID) + len(r.uncheckedCollectors) + metricFamiliesByName := make(map[string]*dto.MetricFamily, len(r.dimHashesByName)) + checkedCollectors := make(chan Collector, len(r.collectorsByID)) + uncheckedCollectors := make(chan Collector, len(r.uncheckedCollectors)) + for _, collector := range r.collectorsByID { + checkedCollectors <- collector + } + for _, collector := range r.uncheckedCollectors { + uncheckedCollectors <- collector + } + // In case pedantic checks are enabled, we have to copy the map before + // giving up the RLock. + if r.pedanticChecksEnabled { + registeredDescIDs = make(map[uint64]struct{}, len(r.descIDs)) + for id := range r.descIDs { + registeredDescIDs[id] = struct{}{} + } + } + r.mtx.RUnlock() + + wg.Add(goroutineBudget) + + collectWorker := func() { + for { + select { + case collector := <-checkedCollectors: + collector.Collect(checkedMetricChan) + case collector := <-uncheckedCollectors: + collector.Collect(uncheckedMetricChan) + default: + return + } + wg.Done() + } + } + + // Start the first worker now to make sure at least one is running. + go collectWorker() + goroutineBudget-- + + // Close checkedMetricChan and uncheckedMetricChan once all collectors + // are collected. + go func() { + wg.Wait() + close(checkedMetricChan) + close(uncheckedMetricChan) + }() + + // Drain checkedMetricChan and uncheckedMetricChan in case of premature return. + defer func() { + if checkedMetricChan != nil { + for range checkedMetricChan { + } + } + if uncheckedMetricChan != nil { + for range uncheckedMetricChan { + } + } + }() + + // Copy the channel references so we can nil them out later to remove + // them from the select statements below. + cmc := checkedMetricChan + umc := uncheckedMetricChan + + for { + select { + case metric, ok := <-cmc: + if !ok { + cmc = nil + break + } + errs.Append(processMetric( + metric, metricFamiliesByName, + metricHashes, + registeredDescIDs, + )) + case metric, ok := <-umc: + if !ok { + umc = nil + break + } + errs.Append(processMetric( + metric, metricFamiliesByName, + metricHashes, + nil, + )) + default: + if goroutineBudget <= 0 || len(checkedCollectors)+len(uncheckedCollectors) == 0 { + // All collectors are already being worked on or + // we have already as many goroutines started as + // there are collectors. Do the same as above, + // just without the default. + select { + case metric, ok := <-cmc: + if !ok { + cmc = nil + break + } + errs.Append(processMetric( + metric, metricFamiliesByName, + metricHashes, + registeredDescIDs, + )) + case metric, ok := <-umc: + if !ok { + umc = nil + break + } + errs.Append(processMetric( + metric, metricFamiliesByName, + metricHashes, + nil, + )) + } + break + } + // Start more workers. + go collectWorker() + goroutineBudget-- + runtime.Gosched() + } + // Once both checkedMetricChan and uncheckdMetricChan are closed + // and drained, the contraption above will nil out cmc and umc, + // and then we can leave the collect loop here. + if cmc == nil && umc == nil { + break + } + } + return internal.NormalizeMetricFamilies(metricFamiliesByName), errs.MaybeUnwrap() +} + +// WriteToTextfile calls Gather on the provided Gatherer, encodes the result in the +// Prometheus text format, and writes it to a temporary file. Upon success, the +// temporary file is renamed to the provided filename. +// +// This is intended for use with the textfile collector of the node exporter. +// Note that the node exporter expects the filename to be suffixed with ".prom". +func WriteToTextfile(filename string, g Gatherer) error { + tmp, err := ioutil.TempFile(filepath.Dir(filename), filepath.Base(filename)) + if err != nil { + return err + } + defer os.Remove(tmp.Name()) + + mfs, err := g.Gather() + if err != nil { + return err + } + for _, mf := range mfs { + if _, err := expfmt.MetricFamilyToText(tmp, mf); err != nil { + return err + } + } + if err := tmp.Close(); err != nil { + return err + } + + if err := os.Chmod(tmp.Name(), 0644); err != nil { + return err + } + return os.Rename(tmp.Name(), filename) +} + +// processMetric is an internal helper method only used by the Gather method. +func processMetric( + metric Metric, + metricFamiliesByName map[string]*dto.MetricFamily, + metricHashes map[uint64]struct{}, + registeredDescIDs map[uint64]struct{}, +) error { + desc := metric.Desc() + // Wrapped metrics collected by an unchecked Collector can have an + // invalid Desc. + if desc.err != nil { + return desc.err + } + dtoMetric := &dto.Metric{} + if err := metric.Write(dtoMetric); err != nil { + return fmt.Errorf("error collecting metric %v: %s", desc, err) + } + metricFamily, ok := metricFamiliesByName[desc.fqName] + if ok { // Existing name. + if metricFamily.GetHelp() != desc.help { + return fmt.Errorf( + "collected metric %s %s has help %q but should have %q", + desc.fqName, dtoMetric, desc.help, metricFamily.GetHelp(), + ) + } + // TODO(beorn7): Simplify switch once Desc has type. + switch metricFamily.GetType() { + case dto.MetricType_COUNTER: + if dtoMetric.Counter == nil { + return fmt.Errorf( + "collected metric %s %s should be a Counter", + desc.fqName, dtoMetric, + ) + } + case dto.MetricType_GAUGE: + if dtoMetric.Gauge == nil { + return fmt.Errorf( + "collected metric %s %s should be a Gauge", + desc.fqName, dtoMetric, + ) + } + case dto.MetricType_SUMMARY: + if dtoMetric.Summary == nil { + return fmt.Errorf( + "collected metric %s %s should be a Summary", + desc.fqName, dtoMetric, + ) + } + case dto.MetricType_UNTYPED: + if dtoMetric.Untyped == nil { + return fmt.Errorf( + "collected metric %s %s should be Untyped", + desc.fqName, dtoMetric, + ) + } + case dto.MetricType_HISTOGRAM: + if dtoMetric.Histogram == nil { + return fmt.Errorf( + "collected metric %s %s should be a Histogram", + desc.fqName, dtoMetric, + ) + } + default: + panic("encountered MetricFamily with invalid type") + } + } else { // New name. + metricFamily = &dto.MetricFamily{} + metricFamily.Name = proto.String(desc.fqName) + metricFamily.Help = proto.String(desc.help) + // TODO(beorn7): Simplify switch once Desc has type. + switch { + case dtoMetric.Gauge != nil: + metricFamily.Type = dto.MetricType_GAUGE.Enum() + case dtoMetric.Counter != nil: + metricFamily.Type = dto.MetricType_COUNTER.Enum() + case dtoMetric.Summary != nil: + metricFamily.Type = dto.MetricType_SUMMARY.Enum() + case dtoMetric.Untyped != nil: + metricFamily.Type = dto.MetricType_UNTYPED.Enum() + case dtoMetric.Histogram != nil: + metricFamily.Type = dto.MetricType_HISTOGRAM.Enum() + default: + return fmt.Errorf("empty metric collected: %s", dtoMetric) + } + if err := checkSuffixCollisions(metricFamily, metricFamiliesByName); err != nil { + return err + } + metricFamiliesByName[desc.fqName] = metricFamily + } + if err := checkMetricConsistency(metricFamily, dtoMetric, metricHashes); err != nil { + return err + } + if registeredDescIDs != nil { + // Is the desc registered at all? + if _, exist := registeredDescIDs[desc.id]; !exist { + return fmt.Errorf( + "collected metric %s %s with unregistered descriptor %s", + metricFamily.GetName(), dtoMetric, desc, + ) + } + if err := checkDescConsistency(metricFamily, dtoMetric, desc); err != nil { + return err + } + } + metricFamily.Metric = append(metricFamily.Metric, dtoMetric) + return nil +} + +// Gatherers is a slice of Gatherer instances that implements the Gatherer +// interface itself. Its Gather method calls Gather on all Gatherers in the +// slice in order and returns the merged results. Errors returned from the +// Gather calls are all returned in a flattened MultiError. Duplicate and +// inconsistent Metrics are skipped (first occurrence in slice order wins) and +// reported in the returned error. +// +// Gatherers can be used to merge the Gather results from multiple +// Registries. It also provides a way to directly inject existing MetricFamily +// protobufs into the gathering by creating a custom Gatherer with a Gather +// method that simply returns the existing MetricFamily protobufs. Note that no +// registration is involved (in contrast to Collector registration), so +// obviously registration-time checks cannot happen. Any inconsistencies between +// the gathered MetricFamilies are reported as errors by the Gather method, and +// inconsistent Metrics are dropped. Invalid parts of the MetricFamilies +// (e.g. syntactically invalid metric or label names) will go undetected. +type Gatherers []Gatherer + +// Gather implements Gatherer. +func (gs Gatherers) Gather() ([]*dto.MetricFamily, error) { + var ( + metricFamiliesByName = map[string]*dto.MetricFamily{} + metricHashes = map[uint64]struct{}{} + errs MultiError // The collected errors to return in the end. + ) + + for i, g := range gs { + mfs, err := g.Gather() + if err != nil { + if multiErr, ok := err.(MultiError); ok { + for _, err := range multiErr { + errs = append(errs, fmt.Errorf("[from Gatherer #%d] %s", i+1, err)) + } + } else { + errs = append(errs, fmt.Errorf("[from Gatherer #%d] %s", i+1, err)) + } + } + for _, mf := range mfs { + existingMF, exists := metricFamiliesByName[mf.GetName()] + if exists { + if existingMF.GetHelp() != mf.GetHelp() { + errs = append(errs, fmt.Errorf( + "gathered metric family %s has help %q but should have %q", + mf.GetName(), mf.GetHelp(), existingMF.GetHelp(), + )) + continue + } + if existingMF.GetType() != mf.GetType() { + errs = append(errs, fmt.Errorf( + "gathered metric family %s has type %s but should have %s", + mf.GetName(), mf.GetType(), existingMF.GetType(), + )) + continue + } + } else { + existingMF = &dto.MetricFamily{} + existingMF.Name = mf.Name + existingMF.Help = mf.Help + existingMF.Type = mf.Type + if err := checkSuffixCollisions(existingMF, metricFamiliesByName); err != nil { + errs = append(errs, err) + continue + } + metricFamiliesByName[mf.GetName()] = existingMF + } + for _, m := range mf.Metric { + if err := checkMetricConsistency(existingMF, m, metricHashes); err != nil { + errs = append(errs, err) + continue + } + existingMF.Metric = append(existingMF.Metric, m) + } + } + } + return internal.NormalizeMetricFamilies(metricFamiliesByName), errs.MaybeUnwrap() +} + +// checkSuffixCollisions checks for collisions with the “magic” suffixes the +// Prometheus text format and the internal metric representation of the +// Prometheus server add while flattening Summaries and Histograms. +func checkSuffixCollisions(mf *dto.MetricFamily, mfs map[string]*dto.MetricFamily) error { + var ( + newName = mf.GetName() + newType = mf.GetType() + newNameWithoutSuffix = "" + ) + switch { + case strings.HasSuffix(newName, "_count"): + newNameWithoutSuffix = newName[:len(newName)-6] + case strings.HasSuffix(newName, "_sum"): + newNameWithoutSuffix = newName[:len(newName)-4] + case strings.HasSuffix(newName, "_bucket"): + newNameWithoutSuffix = newName[:len(newName)-7] + } + if newNameWithoutSuffix != "" { + if existingMF, ok := mfs[newNameWithoutSuffix]; ok { + switch existingMF.GetType() { + case dto.MetricType_SUMMARY: + if !strings.HasSuffix(newName, "_bucket") { + return fmt.Errorf( + "collected metric named %q collides with previously collected summary named %q", + newName, newNameWithoutSuffix, + ) + } + case dto.MetricType_HISTOGRAM: + return fmt.Errorf( + "collected metric named %q collides with previously collected histogram named %q", + newName, newNameWithoutSuffix, + ) + } + } + } + if newType == dto.MetricType_SUMMARY || newType == dto.MetricType_HISTOGRAM { + if _, ok := mfs[newName+"_count"]; ok { + return fmt.Errorf( + "collected histogram or summary named %q collides with previously collected metric named %q", + newName, newName+"_count", + ) + } + if _, ok := mfs[newName+"_sum"]; ok { + return fmt.Errorf( + "collected histogram or summary named %q collides with previously collected metric named %q", + newName, newName+"_sum", + ) + } + } + if newType == dto.MetricType_HISTOGRAM { + if _, ok := mfs[newName+"_bucket"]; ok { + return fmt.Errorf( + "collected histogram named %q collides with previously collected metric named %q", + newName, newName+"_bucket", + ) + } + } + return nil +} + +// checkMetricConsistency checks if the provided Metric is consistent with the +// provided MetricFamily. It also hashes the Metric labels and the MetricFamily +// name. If the resulting hash is already in the provided metricHashes, an error +// is returned. If not, it is added to metricHashes. +func checkMetricConsistency( + metricFamily *dto.MetricFamily, + dtoMetric *dto.Metric, + metricHashes map[uint64]struct{}, +) error { + name := metricFamily.GetName() + + // Type consistency with metric family. + if metricFamily.GetType() == dto.MetricType_GAUGE && dtoMetric.Gauge == nil || + metricFamily.GetType() == dto.MetricType_COUNTER && dtoMetric.Counter == nil || + metricFamily.GetType() == dto.MetricType_SUMMARY && dtoMetric.Summary == nil || + metricFamily.GetType() == dto.MetricType_HISTOGRAM && dtoMetric.Histogram == nil || + metricFamily.GetType() == dto.MetricType_UNTYPED && dtoMetric.Untyped == nil { + return fmt.Errorf( + "collected metric %q { %s} is not a %s", + name, dtoMetric, metricFamily.GetType(), + ) + } + + previousLabelName := "" + for _, labelPair := range dtoMetric.GetLabel() { + labelName := labelPair.GetName() + if labelName == previousLabelName { + return fmt.Errorf( + "collected metric %q { %s} has two or more labels with the same name: %s", + name, dtoMetric, labelName, + ) + } + if !checkLabelName(labelName) { + return fmt.Errorf( + "collected metric %q { %s} has a label with an invalid name: %s", + name, dtoMetric, labelName, + ) + } + if dtoMetric.Summary != nil && labelName == quantileLabel { + return fmt.Errorf( + "collected metric %q { %s} must not have an explicit %q label", + name, dtoMetric, quantileLabel, + ) + } + if !utf8.ValidString(labelPair.GetValue()) { + return fmt.Errorf( + "collected metric %q { %s} has a label named %q whose value is not utf8: %#v", + name, dtoMetric, labelName, labelPair.GetValue()) + } + previousLabelName = labelName + } + + // Is the metric unique (i.e. no other metric with the same name and the same labels)? + h := xxhash.New() + h.WriteString(name) + h.Write(separatorByteSlice) + // Make sure label pairs are sorted. We depend on it for the consistency + // check. + if !sort.IsSorted(labelPairSorter(dtoMetric.Label)) { + // We cannot sort dtoMetric.Label in place as it is immutable by contract. + copiedLabels := make([]*dto.LabelPair, len(dtoMetric.Label)) + copy(copiedLabels, dtoMetric.Label) + sort.Sort(labelPairSorter(copiedLabels)) + dtoMetric.Label = copiedLabels + } + for _, lp := range dtoMetric.Label { + h.WriteString(lp.GetName()) + h.Write(separatorByteSlice) + h.WriteString(lp.GetValue()) + h.Write(separatorByteSlice) + } + hSum := h.Sum64() + if _, exists := metricHashes[hSum]; exists { + return fmt.Errorf( + "collected metric %q { %s} was collected before with the same name and label values", + name, dtoMetric, + ) + } + metricHashes[hSum] = struct{}{} + return nil +} + +func checkDescConsistency( + metricFamily *dto.MetricFamily, + dtoMetric *dto.Metric, + desc *Desc, +) error { + // Desc help consistency with metric family help. + if metricFamily.GetHelp() != desc.help { + return fmt.Errorf( + "collected metric %s %s has help %q but should have %q", + metricFamily.GetName(), dtoMetric, metricFamily.GetHelp(), desc.help, + ) + } + + // Is the desc consistent with the content of the metric? + lpsFromDesc := make([]*dto.LabelPair, len(desc.constLabelPairs), len(dtoMetric.Label)) + copy(lpsFromDesc, desc.constLabelPairs) + for _, l := range desc.variableLabels { + lpsFromDesc = append(lpsFromDesc, &dto.LabelPair{ + Name: proto.String(l), + }) + } + if len(lpsFromDesc) != len(dtoMetric.Label) { + return fmt.Errorf( + "labels in collected metric %s %s are inconsistent with descriptor %s", + metricFamily.GetName(), dtoMetric, desc, + ) + } + sort.Sort(labelPairSorter(lpsFromDesc)) + for i, lpFromDesc := range lpsFromDesc { + lpFromMetric := dtoMetric.Label[i] + if lpFromDesc.GetName() != lpFromMetric.GetName() || + lpFromDesc.Value != nil && lpFromDesc.GetValue() != lpFromMetric.GetValue() { + return fmt.Errorf( + "labels in collected metric %s %s are inconsistent with descriptor %s", + metricFamily.GetName(), dtoMetric, desc, + ) + } + } + return nil +} diff --git a/vendor/github.com/prometheus/client_golang/prometheus/summary.go b/vendor/github.com/prometheus/client_golang/prometheus/summary.go new file mode 100644 index 00000000..f3c1440d --- /dev/null +++ b/vendor/github.com/prometheus/client_golang/prometheus/summary.go @@ -0,0 +1,737 @@ +// Copyright 2014 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package prometheus + +import ( + "fmt" + "math" + "runtime" + "sort" + "sync" + "sync/atomic" + "time" + + "github.com/beorn7/perks/quantile" + //lint:ignore SA1019 Need to keep deprecated package for compatibility. + "github.com/golang/protobuf/proto" + + dto "github.com/prometheus/client_model/go" +) + +// quantileLabel is used for the label that defines the quantile in a +// summary. +const quantileLabel = "quantile" + +// A Summary captures individual observations from an event or sample stream and +// summarizes them in a manner similar to traditional summary statistics: 1. sum +// of observations, 2. observation count, 3. rank estimations. +// +// A typical use-case is the observation of request latencies. By default, a +// Summary provides the median, the 90th and the 99th percentile of the latency +// as rank estimations. However, the default behavior will change in the +// upcoming v1.0.0 of the library. There will be no rank estimations at all by +// default. For a sane transition, it is recommended to set the desired rank +// estimations explicitly. +// +// Note that the rank estimations cannot be aggregated in a meaningful way with +// the Prometheus query language (i.e. you cannot average or add them). If you +// need aggregatable quantiles (e.g. you want the 99th percentile latency of all +// queries served across all instances of a service), consider the Histogram +// metric type. See the Prometheus documentation for more details. +// +// To create Summary instances, use NewSummary. +type Summary interface { + Metric + Collector + + // Observe adds a single observation to the summary. + Observe(float64) +} + +var errQuantileLabelNotAllowed = fmt.Errorf( + "%q is not allowed as label name in summaries", quantileLabel, +) + +// Default values for SummaryOpts. +const ( + // DefMaxAge is the default duration for which observations stay + // relevant. + DefMaxAge time.Duration = 10 * time.Minute + // DefAgeBuckets is the default number of buckets used to calculate the + // age of observations. + DefAgeBuckets = 5 + // DefBufCap is the standard buffer size for collecting Summary observations. + DefBufCap = 500 +) + +// SummaryOpts bundles the options for creating a Summary metric. It is +// mandatory to set Name to a non-empty string. While all other fields are +// optional and can safely be left at their zero value, it is recommended to set +// a help string and to explicitly set the Objectives field to the desired value +// as the default value will change in the upcoming v1.0.0 of the library. +type SummaryOpts struct { + // Namespace, Subsystem, and Name are components of the fully-qualified + // name of the Summary (created by joining these components with + // "_"). Only Name is mandatory, the others merely help structuring the + // name. Note that the fully-qualified name of the Summary must be a + // valid Prometheus metric name. + Namespace string + Subsystem string + Name string + + // Help provides information about this Summary. + // + // Metrics with the same fully-qualified name must have the same Help + // string. + Help string + + // ConstLabels are used to attach fixed labels to this metric. Metrics + // with the same fully-qualified name must have the same label names in + // their ConstLabels. + // + // Due to the way a Summary is represented in the Prometheus text format + // and how it is handled by the Prometheus server internally, “quantile” + // is an illegal label name. Construction of a Summary or SummaryVec + // will panic if this label name is used in ConstLabels. + // + // ConstLabels are only used rarely. In particular, do not use them to + // attach the same labels to all your metrics. Those use cases are + // better covered by target labels set by the scraping Prometheus + // server, or by one specific metric (e.g. a build_info or a + // machine_role metric). See also + // https://prometheus.io/docs/instrumenting/writing_exporters/#target-labels,-not-static-scraped-labels + ConstLabels Labels + + // Objectives defines the quantile rank estimates with their respective + // absolute error. If Objectives[q] = e, then the value reported for q + // will be the φ-quantile value for some φ between q-e and q+e. The + // default value is an empty map, resulting in a summary without + // quantiles. + Objectives map[float64]float64 + + // MaxAge defines the duration for which an observation stays relevant + // for the summary. Must be positive. The default value is DefMaxAge. + MaxAge time.Duration + + // AgeBuckets is the number of buckets used to exclude observations that + // are older than MaxAge from the summary. A higher number has a + // resource penalty, so only increase it if the higher resolution is + // really required. For very high observation rates, you might want to + // reduce the number of age buckets. With only one age bucket, you will + // effectively see a complete reset of the summary each time MaxAge has + // passed. The default value is DefAgeBuckets. + AgeBuckets uint32 + + // BufCap defines the default sample stream buffer size. The default + // value of DefBufCap should suffice for most uses. If there is a need + // to increase the value, a multiple of 500 is recommended (because that + // is the internal buffer size of the underlying package + // "github.com/bmizerany/perks/quantile"). + BufCap uint32 +} + +// Problem with the sliding-window decay algorithm... The Merge method of +// perk/quantile is actually not working as advertised - and it might be +// unfixable, as the underlying algorithm is apparently not capable of merging +// summaries in the first place. To avoid using Merge, we are currently adding +// observations to _each_ age bucket, i.e. the effort to add a sample is +// essentially multiplied by the number of age buckets. When rotating age +// buckets, we empty the previous head stream. On scrape time, we simply take +// the quantiles from the head stream (no merging required). Result: More effort +// on observation time, less effort on scrape time, which is exactly the +// opposite of what we try to accomplish, but at least the results are correct. +// +// The quite elegant previous contraption to merge the age buckets efficiently +// on scrape time (see code up commit 6b9530d72ea715f0ba612c0120e6e09fbf1d49d0) +// can't be used anymore. + +// NewSummary creates a new Summary based on the provided SummaryOpts. +func NewSummary(opts SummaryOpts) Summary { + return newSummary( + NewDesc( + BuildFQName(opts.Namespace, opts.Subsystem, opts.Name), + opts.Help, + nil, + opts.ConstLabels, + ), + opts, + ) +} + +func newSummary(desc *Desc, opts SummaryOpts, labelValues ...string) Summary { + if len(desc.variableLabels) != len(labelValues) { + panic(makeInconsistentCardinalityError(desc.fqName, desc.variableLabels, labelValues)) + } + + for _, n := range desc.variableLabels { + if n == quantileLabel { + panic(errQuantileLabelNotAllowed) + } + } + for _, lp := range desc.constLabelPairs { + if lp.GetName() == quantileLabel { + panic(errQuantileLabelNotAllowed) + } + } + + if opts.Objectives == nil { + opts.Objectives = map[float64]float64{} + } + + if opts.MaxAge < 0 { + panic(fmt.Errorf("illegal max age MaxAge=%v", opts.MaxAge)) + } + if opts.MaxAge == 0 { + opts.MaxAge = DefMaxAge + } + + if opts.AgeBuckets == 0 { + opts.AgeBuckets = DefAgeBuckets + } + + if opts.BufCap == 0 { + opts.BufCap = DefBufCap + } + + if len(opts.Objectives) == 0 { + // Use the lock-free implementation of a Summary without objectives. + s := &noObjectivesSummary{ + desc: desc, + labelPairs: makeLabelPairs(desc, labelValues), + counts: [2]*summaryCounts{{}, {}}, + } + s.init(s) // Init self-collection. + return s + } + + s := &summary{ + desc: desc, + + objectives: opts.Objectives, + sortedObjectives: make([]float64, 0, len(opts.Objectives)), + + labelPairs: makeLabelPairs(desc, labelValues), + + hotBuf: make([]float64, 0, opts.BufCap), + coldBuf: make([]float64, 0, opts.BufCap), + streamDuration: opts.MaxAge / time.Duration(opts.AgeBuckets), + } + s.headStreamExpTime = time.Now().Add(s.streamDuration) + s.hotBufExpTime = s.headStreamExpTime + + for i := uint32(0); i < opts.AgeBuckets; i++ { + s.streams = append(s.streams, s.newStream()) + } + s.headStream = s.streams[0] + + for qu := range s.objectives { + s.sortedObjectives = append(s.sortedObjectives, qu) + } + sort.Float64s(s.sortedObjectives) + + s.init(s) // Init self-collection. + return s +} + +type summary struct { + selfCollector + + bufMtx sync.Mutex // Protects hotBuf and hotBufExpTime. + mtx sync.Mutex // Protects every other moving part. + // Lock bufMtx before mtx if both are needed. + + desc *Desc + + objectives map[float64]float64 + sortedObjectives []float64 + + labelPairs []*dto.LabelPair + + sum float64 + cnt uint64 + + hotBuf, coldBuf []float64 + + streams []*quantile.Stream + streamDuration time.Duration + headStream *quantile.Stream + headStreamIdx int + headStreamExpTime, hotBufExpTime time.Time +} + +func (s *summary) Desc() *Desc { + return s.desc +} + +func (s *summary) Observe(v float64) { + s.bufMtx.Lock() + defer s.bufMtx.Unlock() + + now := time.Now() + if now.After(s.hotBufExpTime) { + s.asyncFlush(now) + } + s.hotBuf = append(s.hotBuf, v) + if len(s.hotBuf) == cap(s.hotBuf) { + s.asyncFlush(now) + } +} + +func (s *summary) Write(out *dto.Metric) error { + sum := &dto.Summary{} + qs := make([]*dto.Quantile, 0, len(s.objectives)) + + s.bufMtx.Lock() + s.mtx.Lock() + // Swap bufs even if hotBuf is empty to set new hotBufExpTime. + s.swapBufs(time.Now()) + s.bufMtx.Unlock() + + s.flushColdBuf() + sum.SampleCount = proto.Uint64(s.cnt) + sum.SampleSum = proto.Float64(s.sum) + + for _, rank := range s.sortedObjectives { + var q float64 + if s.headStream.Count() == 0 { + q = math.NaN() + } else { + q = s.headStream.Query(rank) + } + qs = append(qs, &dto.Quantile{ + Quantile: proto.Float64(rank), + Value: proto.Float64(q), + }) + } + + s.mtx.Unlock() + + if len(qs) > 0 { + sort.Sort(quantSort(qs)) + } + sum.Quantile = qs + + out.Summary = sum + out.Label = s.labelPairs + return nil +} + +func (s *summary) newStream() *quantile.Stream { + return quantile.NewTargeted(s.objectives) +} + +// asyncFlush needs bufMtx locked. +func (s *summary) asyncFlush(now time.Time) { + s.mtx.Lock() + s.swapBufs(now) + + // Unblock the original goroutine that was responsible for the mutation + // that triggered the compaction. But hold onto the global non-buffer + // state mutex until the operation finishes. + go func() { + s.flushColdBuf() + s.mtx.Unlock() + }() +} + +// rotateStreams needs mtx AND bufMtx locked. +func (s *summary) maybeRotateStreams() { + for !s.hotBufExpTime.Equal(s.headStreamExpTime) { + s.headStream.Reset() + s.headStreamIdx++ + if s.headStreamIdx >= len(s.streams) { + s.headStreamIdx = 0 + } + s.headStream = s.streams[s.headStreamIdx] + s.headStreamExpTime = s.headStreamExpTime.Add(s.streamDuration) + } +} + +// flushColdBuf needs mtx locked. +func (s *summary) flushColdBuf() { + for _, v := range s.coldBuf { + for _, stream := range s.streams { + stream.Insert(v) + } + s.cnt++ + s.sum += v + } + s.coldBuf = s.coldBuf[0:0] + s.maybeRotateStreams() +} + +// swapBufs needs mtx AND bufMtx locked, coldBuf must be empty. +func (s *summary) swapBufs(now time.Time) { + if len(s.coldBuf) != 0 { + panic("coldBuf is not empty") + } + s.hotBuf, s.coldBuf = s.coldBuf, s.hotBuf + // hotBuf is now empty and gets new expiration set. + for now.After(s.hotBufExpTime) { + s.hotBufExpTime = s.hotBufExpTime.Add(s.streamDuration) + } +} + +type summaryCounts struct { + // sumBits contains the bits of the float64 representing the sum of all + // observations. sumBits and count have to go first in the struct to + // guarantee alignment for atomic operations. + // http://golang.org/pkg/sync/atomic/#pkg-note-BUG + sumBits uint64 + count uint64 +} + +type noObjectivesSummary struct { + // countAndHotIdx enables lock-free writes with use of atomic updates. + // The most significant bit is the hot index [0 or 1] of the count field + // below. Observe calls update the hot one. All remaining bits count the + // number of Observe calls. Observe starts by incrementing this counter, + // and finish by incrementing the count field in the respective + // summaryCounts, as a marker for completion. + // + // Calls of the Write method (which are non-mutating reads from the + // perspective of the summary) swap the hot–cold under the writeMtx + // lock. A cooldown is awaited (while locked) by comparing the number of + // observations with the initiation count. Once they match, then the + // last observation on the now cool one has completed. All cool fields must + // be merged into the new hot before releasing writeMtx. + + // Fields with atomic access first! See alignment constraint: + // http://golang.org/pkg/sync/atomic/#pkg-note-BUG + countAndHotIdx uint64 + + selfCollector + desc *Desc + writeMtx sync.Mutex // Only used in the Write method. + + // Two counts, one is "hot" for lock-free observations, the other is + // "cold" for writing out a dto.Metric. It has to be an array of + // pointers to guarantee 64bit alignment of the histogramCounts, see + // http://golang.org/pkg/sync/atomic/#pkg-note-BUG. + counts [2]*summaryCounts + + labelPairs []*dto.LabelPair +} + +func (s *noObjectivesSummary) Desc() *Desc { + return s.desc +} + +func (s *noObjectivesSummary) Observe(v float64) { + // We increment h.countAndHotIdx so that the counter in the lower + // 63 bits gets incremented. At the same time, we get the new value + // back, which we can use to find the currently-hot counts. + n := atomic.AddUint64(&s.countAndHotIdx, 1) + hotCounts := s.counts[n>>63] + + for { + oldBits := atomic.LoadUint64(&hotCounts.sumBits) + newBits := math.Float64bits(math.Float64frombits(oldBits) + v) + if atomic.CompareAndSwapUint64(&hotCounts.sumBits, oldBits, newBits) { + break + } + } + // Increment count last as we take it as a signal that the observation + // is complete. + atomic.AddUint64(&hotCounts.count, 1) +} + +func (s *noObjectivesSummary) Write(out *dto.Metric) error { + // For simplicity, we protect this whole method by a mutex. It is not in + // the hot path, i.e. Observe is called much more often than Write. The + // complication of making Write lock-free isn't worth it, if possible at + // all. + s.writeMtx.Lock() + defer s.writeMtx.Unlock() + + // Adding 1<<63 switches the hot index (from 0 to 1 or from 1 to 0) + // without touching the count bits. See the struct comments for a full + // description of the algorithm. + n := atomic.AddUint64(&s.countAndHotIdx, 1<<63) + // count is contained unchanged in the lower 63 bits. + count := n & ((1 << 63) - 1) + // The most significant bit tells us which counts is hot. The complement + // is thus the cold one. + hotCounts := s.counts[n>>63] + coldCounts := s.counts[(^n)>>63] + + // Await cooldown. + for count != atomic.LoadUint64(&coldCounts.count) { + runtime.Gosched() // Let observations get work done. + } + + sum := &dto.Summary{ + SampleCount: proto.Uint64(count), + SampleSum: proto.Float64(math.Float64frombits(atomic.LoadUint64(&coldCounts.sumBits))), + } + + out.Summary = sum + out.Label = s.labelPairs + + // Finally add all the cold counts to the new hot counts and reset the cold counts. + atomic.AddUint64(&hotCounts.count, count) + atomic.StoreUint64(&coldCounts.count, 0) + for { + oldBits := atomic.LoadUint64(&hotCounts.sumBits) + newBits := math.Float64bits(math.Float64frombits(oldBits) + sum.GetSampleSum()) + if atomic.CompareAndSwapUint64(&hotCounts.sumBits, oldBits, newBits) { + atomic.StoreUint64(&coldCounts.sumBits, 0) + break + } + } + return nil +} + +type quantSort []*dto.Quantile + +func (s quantSort) Len() int { + return len(s) +} + +func (s quantSort) Swap(i, j int) { + s[i], s[j] = s[j], s[i] +} + +func (s quantSort) Less(i, j int) bool { + return s[i].GetQuantile() < s[j].GetQuantile() +} + +// SummaryVec is a Collector that bundles a set of Summaries that all share the +// same Desc, but have different values for their variable labels. This is used +// if you want to count the same thing partitioned by various dimensions +// (e.g. HTTP request latencies, partitioned by status code and method). Create +// instances with NewSummaryVec. +type SummaryVec struct { + *metricVec +} + +// NewSummaryVec creates a new SummaryVec based on the provided SummaryOpts and +// partitioned by the given label names. +// +// Due to the way a Summary is represented in the Prometheus text format and how +// it is handled by the Prometheus server internally, “quantile” is an illegal +// label name. NewSummaryVec will panic if this label name is used. +func NewSummaryVec(opts SummaryOpts, labelNames []string) *SummaryVec { + for _, ln := range labelNames { + if ln == quantileLabel { + panic(errQuantileLabelNotAllowed) + } + } + desc := NewDesc( + BuildFQName(opts.Namespace, opts.Subsystem, opts.Name), + opts.Help, + labelNames, + opts.ConstLabels, + ) + return &SummaryVec{ + metricVec: newMetricVec(desc, func(lvs ...string) Metric { + return newSummary(desc, opts, lvs...) + }), + } +} + +// GetMetricWithLabelValues returns the Summary for the given slice of label +// values (same order as the VariableLabels in Desc). If that combination of +// label values is accessed for the first time, a new Summary is created. +// +// It is possible to call this method without using the returned Summary to only +// create the new Summary but leave it at its starting value, a Summary without +// any observations. +// +// Keeping the Summary for later use is possible (and should be considered if +// performance is critical), but keep in mind that Reset, DeleteLabelValues and +// Delete can be used to delete the Summary from the SummaryVec. In that case, +// the Summary will still exist, but it will not be exported anymore, even if a +// Summary with the same label values is created later. See also the CounterVec +// example. +// +// An error is returned if the number of label values is not the same as the +// number of VariableLabels in Desc (minus any curried labels). +// +// Note that for more than one label value, this method is prone to mistakes +// caused by an incorrect order of arguments. Consider GetMetricWith(Labels) as +// an alternative to avoid that type of mistake. For higher label numbers, the +// latter has a much more readable (albeit more verbose) syntax, but it comes +// with a performance overhead (for creating and processing the Labels map). +// See also the GaugeVec example. +func (v *SummaryVec) GetMetricWithLabelValues(lvs ...string) (Observer, error) { + metric, err := v.metricVec.getMetricWithLabelValues(lvs...) + if metric != nil { + return metric.(Observer), err + } + return nil, err +} + +// GetMetricWith returns the Summary for the given Labels map (the label names +// must match those of the VariableLabels in Desc). If that label map is +// accessed for the first time, a new Summary is created. Implications of +// creating a Summary without using it and keeping the Summary for later use are +// the same as for GetMetricWithLabelValues. +// +// An error is returned if the number and names of the Labels are inconsistent +// with those of the VariableLabels in Desc (minus any curried labels). +// +// This method is used for the same purpose as +// GetMetricWithLabelValues(...string). See there for pros and cons of the two +// methods. +func (v *SummaryVec) GetMetricWith(labels Labels) (Observer, error) { + metric, err := v.metricVec.getMetricWith(labels) + if metric != nil { + return metric.(Observer), err + } + return nil, err +} + +// WithLabelValues works as GetMetricWithLabelValues, but panics where +// GetMetricWithLabelValues would have returned an error. Not returning an +// error allows shortcuts like +// myVec.WithLabelValues("404", "GET").Observe(42.21) +func (v *SummaryVec) WithLabelValues(lvs ...string) Observer { + s, err := v.GetMetricWithLabelValues(lvs...) + if err != nil { + panic(err) + } + return s +} + +// With works as GetMetricWith, but panics where GetMetricWithLabels would have +// returned an error. Not returning an error allows shortcuts like +// myVec.With(prometheus.Labels{"code": "404", "method": "GET"}).Observe(42.21) +func (v *SummaryVec) With(labels Labels) Observer { + s, err := v.GetMetricWith(labels) + if err != nil { + panic(err) + } + return s +} + +// CurryWith returns a vector curried with the provided labels, i.e. the +// returned vector has those labels pre-set for all labeled operations performed +// on it. The cardinality of the curried vector is reduced accordingly. The +// order of the remaining labels stays the same (just with the curried labels +// taken out of the sequence – which is relevant for the +// (GetMetric)WithLabelValues methods). It is possible to curry a curried +// vector, but only with labels not yet used for currying before. +// +// The metrics contained in the SummaryVec are shared between the curried and +// uncurried vectors. They are just accessed differently. Curried and uncurried +// vectors behave identically in terms of collection. Only one must be +// registered with a given registry (usually the uncurried version). The Reset +// method deletes all metrics, even if called on a curried vector. +func (v *SummaryVec) CurryWith(labels Labels) (ObserverVec, error) { + vec, err := v.curryWith(labels) + if vec != nil { + return &SummaryVec{vec}, err + } + return nil, err +} + +// MustCurryWith works as CurryWith but panics where CurryWith would have +// returned an error. +func (v *SummaryVec) MustCurryWith(labels Labels) ObserverVec { + vec, err := v.CurryWith(labels) + if err != nil { + panic(err) + } + return vec +} + +type constSummary struct { + desc *Desc + count uint64 + sum float64 + quantiles map[float64]float64 + labelPairs []*dto.LabelPair +} + +func (s *constSummary) Desc() *Desc { + return s.desc +} + +func (s *constSummary) Write(out *dto.Metric) error { + sum := &dto.Summary{} + qs := make([]*dto.Quantile, 0, len(s.quantiles)) + + sum.SampleCount = proto.Uint64(s.count) + sum.SampleSum = proto.Float64(s.sum) + + for rank, q := range s.quantiles { + qs = append(qs, &dto.Quantile{ + Quantile: proto.Float64(rank), + Value: proto.Float64(q), + }) + } + + if len(qs) > 0 { + sort.Sort(quantSort(qs)) + } + sum.Quantile = qs + + out.Summary = sum + out.Label = s.labelPairs + + return nil +} + +// NewConstSummary returns a metric representing a Prometheus summary with fixed +// values for the count, sum, and quantiles. As those parameters cannot be +// changed, the returned value does not implement the Summary interface (but +// only the Metric interface). Users of this package will not have much use for +// it in regular operations. However, when implementing custom Collectors, it is +// useful as a throw-away metric that is generated on the fly to send it to +// Prometheus in the Collect method. +// +// quantiles maps ranks to quantile values. For example, a median latency of +// 0.23s and a 99th percentile latency of 0.56s would be expressed as: +// map[float64]float64{0.5: 0.23, 0.99: 0.56} +// +// NewConstSummary returns an error if the length of labelValues is not +// consistent with the variable labels in Desc or if Desc is invalid. +func NewConstSummary( + desc *Desc, + count uint64, + sum float64, + quantiles map[float64]float64, + labelValues ...string, +) (Metric, error) { + if desc.err != nil { + return nil, desc.err + } + if err := validateLabelValues(labelValues, len(desc.variableLabels)); err != nil { + return nil, err + } + return &constSummary{ + desc: desc, + count: count, + sum: sum, + quantiles: quantiles, + labelPairs: makeLabelPairs(desc, labelValues), + }, nil +} + +// MustNewConstSummary is a version of NewConstSummary that panics where +// NewConstMetric would have returned an error. +func MustNewConstSummary( + desc *Desc, + count uint64, + sum float64, + quantiles map[float64]float64, + labelValues ...string, +) Metric { + m, err := NewConstSummary(desc, count, sum, quantiles, labelValues...) + if err != nil { + panic(err) + } + return m +} diff --git a/vendor/github.com/prometheus/client_golang/prometheus/timer.go b/vendor/github.com/prometheus/client_golang/prometheus/timer.go new file mode 100644 index 00000000..8d5f1052 --- /dev/null +++ b/vendor/github.com/prometheus/client_golang/prometheus/timer.go @@ -0,0 +1,54 @@ +// Copyright 2016 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package prometheus + +import "time" + +// Timer is a helper type to time functions. Use NewTimer to create new +// instances. +type Timer struct { + begin time.Time + observer Observer +} + +// NewTimer creates a new Timer. The provided Observer is used to observe a +// duration in seconds. Timer is usually used to time a function call in the +// following way: +// func TimeMe() { +// timer := NewTimer(myHistogram) +// defer timer.ObserveDuration() +// // Do actual work. +// } +func NewTimer(o Observer) *Timer { + return &Timer{ + begin: time.Now(), + observer: o, + } +} + +// ObserveDuration records the duration passed since the Timer was created with +// NewTimer. It calls the Observe method of the Observer provided during +// construction with the duration in seconds as an argument. The observed +// duration is also returned. ObserveDuration is usually called with a defer +// statement. +// +// Note that this method is only guaranteed to never observe negative durations +// if used with Go1.9+. +func (t *Timer) ObserveDuration() time.Duration { + d := time.Since(t.begin) + if t.observer != nil { + t.observer.Observe(d.Seconds()) + } + return d +} diff --git a/vendor/github.com/prometheus/client_golang/prometheus/untyped.go b/vendor/github.com/prometheus/client_golang/prometheus/untyped.go new file mode 100644 index 00000000..0f9ce63f --- /dev/null +++ b/vendor/github.com/prometheus/client_golang/prometheus/untyped.go @@ -0,0 +1,42 @@ +// Copyright 2014 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package prometheus + +// UntypedOpts is an alias for Opts. See there for doc comments. +type UntypedOpts Opts + +// UntypedFunc works like GaugeFunc but the collected metric is of type +// "Untyped". UntypedFunc is useful to mirror an external metric of unknown +// type. +// +// To create UntypedFunc instances, use NewUntypedFunc. +type UntypedFunc interface { + Metric + Collector +} + +// NewUntypedFunc creates a new UntypedFunc based on the provided +// UntypedOpts. The value reported is determined by calling the given function +// from within the Write method. Take into account that metric collection may +// happen concurrently. If that results in concurrent calls to Write, like in +// the case where an UntypedFunc is directly registered with Prometheus, the +// provided function must be concurrency-safe. +func NewUntypedFunc(opts UntypedOpts, function func() float64) UntypedFunc { + return newValueFunc(NewDesc( + BuildFQName(opts.Namespace, opts.Subsystem, opts.Name), + opts.Help, + nil, + opts.ConstLabels, + ), UntypedValue, function) +} diff --git a/vendor/github.com/prometheus/client_golang/prometheus/value.go b/vendor/github.com/prometheus/client_golang/prometheus/value.go new file mode 100644 index 00000000..6206928c --- /dev/null +++ b/vendor/github.com/prometheus/client_golang/prometheus/value.go @@ -0,0 +1,205 @@ +// Copyright 2014 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package prometheus + +import ( + "fmt" + "sort" + "time" + "unicode/utf8" + + //lint:ignore SA1019 Need to keep deprecated package for compatibility. + "github.com/golang/protobuf/proto" + "github.com/golang/protobuf/ptypes" + + dto "github.com/prometheus/client_model/go" +) + +// ValueType is an enumeration of metric types that represent a simple value. +type ValueType int + +// Possible values for the ValueType enum. Use UntypedValue to mark a metric +// with an unknown type. +const ( + _ ValueType = iota + CounterValue + GaugeValue + UntypedValue +) + +// valueFunc is a generic metric for simple values retrieved on collect time +// from a function. It implements Metric and Collector. Its effective type is +// determined by ValueType. This is a low-level building block used by the +// library to back the implementations of CounterFunc, GaugeFunc, and +// UntypedFunc. +type valueFunc struct { + selfCollector + + desc *Desc + valType ValueType + function func() float64 + labelPairs []*dto.LabelPair +} + +// newValueFunc returns a newly allocated valueFunc with the given Desc and +// ValueType. The value reported is determined by calling the given function +// from within the Write method. Take into account that metric collection may +// happen concurrently. If that results in concurrent calls to Write, like in +// the case where a valueFunc is directly registered with Prometheus, the +// provided function must be concurrency-safe. +func newValueFunc(desc *Desc, valueType ValueType, function func() float64) *valueFunc { + result := &valueFunc{ + desc: desc, + valType: valueType, + function: function, + labelPairs: makeLabelPairs(desc, nil), + } + result.init(result) + return result +} + +func (v *valueFunc) Desc() *Desc { + return v.desc +} + +func (v *valueFunc) Write(out *dto.Metric) error { + return populateMetric(v.valType, v.function(), v.labelPairs, nil, out) +} + +// NewConstMetric returns a metric with one fixed value that cannot be +// changed. Users of this package will not have much use for it in regular +// operations. However, when implementing custom Collectors, it is useful as a +// throw-away metric that is generated on the fly to send it to Prometheus in +// the Collect method. NewConstMetric returns an error if the length of +// labelValues is not consistent with the variable labels in Desc or if Desc is +// invalid. +func NewConstMetric(desc *Desc, valueType ValueType, value float64, labelValues ...string) (Metric, error) { + if desc.err != nil { + return nil, desc.err + } + if err := validateLabelValues(labelValues, len(desc.variableLabels)); err != nil { + return nil, err + } + return &constMetric{ + desc: desc, + valType: valueType, + val: value, + labelPairs: makeLabelPairs(desc, labelValues), + }, nil +} + +// MustNewConstMetric is a version of NewConstMetric that panics where +// NewConstMetric would have returned an error. +func MustNewConstMetric(desc *Desc, valueType ValueType, value float64, labelValues ...string) Metric { + m, err := NewConstMetric(desc, valueType, value, labelValues...) + if err != nil { + panic(err) + } + return m +} + +type constMetric struct { + desc *Desc + valType ValueType + val float64 + labelPairs []*dto.LabelPair +} + +func (m *constMetric) Desc() *Desc { + return m.desc +} + +func (m *constMetric) Write(out *dto.Metric) error { + return populateMetric(m.valType, m.val, m.labelPairs, nil, out) +} + +func populateMetric( + t ValueType, + v float64, + labelPairs []*dto.LabelPair, + e *dto.Exemplar, + m *dto.Metric, +) error { + m.Label = labelPairs + switch t { + case CounterValue: + m.Counter = &dto.Counter{Value: proto.Float64(v), Exemplar: e} + case GaugeValue: + m.Gauge = &dto.Gauge{Value: proto.Float64(v)} + case UntypedValue: + m.Untyped = &dto.Untyped{Value: proto.Float64(v)} + default: + return fmt.Errorf("encountered unknown type %v", t) + } + return nil +} + +func makeLabelPairs(desc *Desc, labelValues []string) []*dto.LabelPair { + totalLen := len(desc.variableLabels) + len(desc.constLabelPairs) + if totalLen == 0 { + // Super fast path. + return nil + } + if len(desc.variableLabels) == 0 { + // Moderately fast path. + return desc.constLabelPairs + } + labelPairs := make([]*dto.LabelPair, 0, totalLen) + for i, n := range desc.variableLabels { + labelPairs = append(labelPairs, &dto.LabelPair{ + Name: proto.String(n), + Value: proto.String(labelValues[i]), + }) + } + labelPairs = append(labelPairs, desc.constLabelPairs...) + sort.Sort(labelPairSorter(labelPairs)) + return labelPairs +} + +// ExemplarMaxRunes is the max total number of runes allowed in exemplar labels. +const ExemplarMaxRunes = 64 + +// newExemplar creates a new dto.Exemplar from the provided values. An error is +// returned if any of the label names or values are invalid or if the total +// number of runes in the label names and values exceeds ExemplarMaxRunes. +func newExemplar(value float64, ts time.Time, l Labels) (*dto.Exemplar, error) { + e := &dto.Exemplar{} + e.Value = proto.Float64(value) + tsProto, err := ptypes.TimestampProto(ts) + if err != nil { + return nil, err + } + e.Timestamp = tsProto + labelPairs := make([]*dto.LabelPair, 0, len(l)) + var runes int + for name, value := range l { + if !checkLabelName(name) { + return nil, fmt.Errorf("exemplar label name %q is invalid", name) + } + runes += utf8.RuneCountInString(name) + if !utf8.ValidString(value) { + return nil, fmt.Errorf("exemplar label value %q is not valid UTF-8", value) + } + runes += utf8.RuneCountInString(value) + labelPairs = append(labelPairs, &dto.LabelPair{ + Name: proto.String(name), + Value: proto.String(value), + }) + } + if runes > ExemplarMaxRunes { + return nil, fmt.Errorf("exemplar labels have %d runes, exceeding the limit of %d", runes, ExemplarMaxRunes) + } + e.Label = labelPairs + return e, nil +} diff --git a/vendor/github.com/prometheus/client_golang/prometheus/vec.go b/vendor/github.com/prometheus/client_golang/prometheus/vec.go new file mode 100644 index 00000000..d53848dc --- /dev/null +++ b/vendor/github.com/prometheus/client_golang/prometheus/vec.go @@ -0,0 +1,484 @@ +// Copyright 2014 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package prometheus + +import ( + "fmt" + "sync" + + "github.com/prometheus/common/model" +) + +// metricVec is a Collector to bundle metrics of the same name that differ in +// their label values. metricVec is not used directly (and therefore +// unexported). It is used as a building block for implementations of vectors of +// a given metric type, like GaugeVec, CounterVec, SummaryVec, and HistogramVec. +// It also handles label currying. +type metricVec struct { + *metricMap + + curry []curriedLabelValue + + // hashAdd and hashAddByte can be replaced for testing collision handling. + hashAdd func(h uint64, s string) uint64 + hashAddByte func(h uint64, b byte) uint64 +} + +// newMetricVec returns an initialized metricVec. +func newMetricVec(desc *Desc, newMetric func(lvs ...string) Metric) *metricVec { + return &metricVec{ + metricMap: &metricMap{ + metrics: map[uint64][]metricWithLabelValues{}, + desc: desc, + newMetric: newMetric, + }, + hashAdd: hashAdd, + hashAddByte: hashAddByte, + } +} + +// DeleteLabelValues removes the metric where the variable labels are the same +// as those passed in as labels (same order as the VariableLabels in Desc). It +// returns true if a metric was deleted. +// +// It is not an error if the number of label values is not the same as the +// number of VariableLabels in Desc. However, such inconsistent label count can +// never match an actual metric, so the method will always return false in that +// case. +// +// Note that for more than one label value, this method is prone to mistakes +// caused by an incorrect order of arguments. Consider Delete(Labels) as an +// alternative to avoid that type of mistake. For higher label numbers, the +// latter has a much more readable (albeit more verbose) syntax, but it comes +// with a performance overhead (for creating and processing the Labels map). +// See also the CounterVec example. +func (m *metricVec) DeleteLabelValues(lvs ...string) bool { + h, err := m.hashLabelValues(lvs) + if err != nil { + return false + } + + return m.metricMap.deleteByHashWithLabelValues(h, lvs, m.curry) +} + +// Delete deletes the metric where the variable labels are the same as those +// passed in as labels. It returns true if a metric was deleted. +// +// It is not an error if the number and names of the Labels are inconsistent +// with those of the VariableLabels in Desc. However, such inconsistent Labels +// can never match an actual metric, so the method will always return false in +// that case. +// +// This method is used for the same purpose as DeleteLabelValues(...string). See +// there for pros and cons of the two methods. +func (m *metricVec) Delete(labels Labels) bool { + h, err := m.hashLabels(labels) + if err != nil { + return false + } + + return m.metricMap.deleteByHashWithLabels(h, labels, m.curry) +} + +// Without explicit forwarding of Describe, Collect, Reset, those methods won't +// show up in GoDoc. + +// Describe implements Collector. +func (m *metricVec) Describe(ch chan<- *Desc) { m.metricMap.Describe(ch) } + +// Collect implements Collector. +func (m *metricVec) Collect(ch chan<- Metric) { m.metricMap.Collect(ch) } + +// Reset deletes all metrics in this vector. +func (m *metricVec) Reset() { m.metricMap.Reset() } + +func (m *metricVec) curryWith(labels Labels) (*metricVec, error) { + var ( + newCurry []curriedLabelValue + oldCurry = m.curry + iCurry int + ) + for i, label := range m.desc.variableLabels { + val, ok := labels[label] + if iCurry < len(oldCurry) && oldCurry[iCurry].index == i { + if ok { + return nil, fmt.Errorf("label name %q is already curried", label) + } + newCurry = append(newCurry, oldCurry[iCurry]) + iCurry++ + } else { + if !ok { + continue // Label stays uncurried. + } + newCurry = append(newCurry, curriedLabelValue{i, val}) + } + } + if l := len(oldCurry) + len(labels) - len(newCurry); l > 0 { + return nil, fmt.Errorf("%d unknown label(s) found during currying", l) + } + + return &metricVec{ + metricMap: m.metricMap, + curry: newCurry, + hashAdd: m.hashAdd, + hashAddByte: m.hashAddByte, + }, nil +} + +func (m *metricVec) getMetricWithLabelValues(lvs ...string) (Metric, error) { + h, err := m.hashLabelValues(lvs) + if err != nil { + return nil, err + } + + return m.metricMap.getOrCreateMetricWithLabelValues(h, lvs, m.curry), nil +} + +func (m *metricVec) getMetricWith(labels Labels) (Metric, error) { + h, err := m.hashLabels(labels) + if err != nil { + return nil, err + } + + return m.metricMap.getOrCreateMetricWithLabels(h, labels, m.curry), nil +} + +func (m *metricVec) hashLabelValues(vals []string) (uint64, error) { + if err := validateLabelValues(vals, len(m.desc.variableLabels)-len(m.curry)); err != nil { + return 0, err + } + + var ( + h = hashNew() + curry = m.curry + iVals, iCurry int + ) + for i := 0; i < len(m.desc.variableLabels); i++ { + if iCurry < len(curry) && curry[iCurry].index == i { + h = m.hashAdd(h, curry[iCurry].value) + iCurry++ + } else { + h = m.hashAdd(h, vals[iVals]) + iVals++ + } + h = m.hashAddByte(h, model.SeparatorByte) + } + return h, nil +} + +func (m *metricVec) hashLabels(labels Labels) (uint64, error) { + if err := validateValuesInLabels(labels, len(m.desc.variableLabels)-len(m.curry)); err != nil { + return 0, err + } + + var ( + h = hashNew() + curry = m.curry + iCurry int + ) + for i, label := range m.desc.variableLabels { + val, ok := labels[label] + if iCurry < len(curry) && curry[iCurry].index == i { + if ok { + return 0, fmt.Errorf("label name %q is already curried", label) + } + h = m.hashAdd(h, curry[iCurry].value) + iCurry++ + } else { + if !ok { + return 0, fmt.Errorf("label name %q missing in label map", label) + } + h = m.hashAdd(h, val) + } + h = m.hashAddByte(h, model.SeparatorByte) + } + return h, nil +} + +// metricWithLabelValues provides the metric and its label values for +// disambiguation on hash collision. +type metricWithLabelValues struct { + values []string + metric Metric +} + +// curriedLabelValue sets the curried value for a label at the given index. +type curriedLabelValue struct { + index int + value string +} + +// metricMap is a helper for metricVec and shared between differently curried +// metricVecs. +type metricMap struct { + mtx sync.RWMutex // Protects metrics. + metrics map[uint64][]metricWithLabelValues + desc *Desc + newMetric func(labelValues ...string) Metric +} + +// Describe implements Collector. It will send exactly one Desc to the provided +// channel. +func (m *metricMap) Describe(ch chan<- *Desc) { + ch <- m.desc +} + +// Collect implements Collector. +func (m *metricMap) Collect(ch chan<- Metric) { + m.mtx.RLock() + defer m.mtx.RUnlock() + + for _, metrics := range m.metrics { + for _, metric := range metrics { + ch <- metric.metric + } + } +} + +// Reset deletes all metrics in this vector. +func (m *metricMap) Reset() { + m.mtx.Lock() + defer m.mtx.Unlock() + + for h := range m.metrics { + delete(m.metrics, h) + } +} + +// deleteByHashWithLabelValues removes the metric from the hash bucket h. If +// there are multiple matches in the bucket, use lvs to select a metric and +// remove only that metric. +func (m *metricMap) deleteByHashWithLabelValues( + h uint64, lvs []string, curry []curriedLabelValue, +) bool { + m.mtx.Lock() + defer m.mtx.Unlock() + + metrics, ok := m.metrics[h] + if !ok { + return false + } + + i := findMetricWithLabelValues(metrics, lvs, curry) + if i >= len(metrics) { + return false + } + + if len(metrics) > 1 { + m.metrics[h] = append(metrics[:i], metrics[i+1:]...) + } else { + delete(m.metrics, h) + } + return true +} + +// deleteByHashWithLabels removes the metric from the hash bucket h. If there +// are multiple matches in the bucket, use lvs to select a metric and remove +// only that metric. +func (m *metricMap) deleteByHashWithLabels( + h uint64, labels Labels, curry []curriedLabelValue, +) bool { + m.mtx.Lock() + defer m.mtx.Unlock() + + metrics, ok := m.metrics[h] + if !ok { + return false + } + i := findMetricWithLabels(m.desc, metrics, labels, curry) + if i >= len(metrics) { + return false + } + + if len(metrics) > 1 { + m.metrics[h] = append(metrics[:i], metrics[i+1:]...) + } else { + delete(m.metrics, h) + } + return true +} + +// getOrCreateMetricWithLabelValues retrieves the metric by hash and label value +// or creates it and returns the new one. +// +// This function holds the mutex. +func (m *metricMap) getOrCreateMetricWithLabelValues( + hash uint64, lvs []string, curry []curriedLabelValue, +) Metric { + m.mtx.RLock() + metric, ok := m.getMetricWithHashAndLabelValues(hash, lvs, curry) + m.mtx.RUnlock() + if ok { + return metric + } + + m.mtx.Lock() + defer m.mtx.Unlock() + metric, ok = m.getMetricWithHashAndLabelValues(hash, lvs, curry) + if !ok { + inlinedLVs := inlineLabelValues(lvs, curry) + metric = m.newMetric(inlinedLVs...) + m.metrics[hash] = append(m.metrics[hash], metricWithLabelValues{values: inlinedLVs, metric: metric}) + } + return metric +} + +// getOrCreateMetricWithLabelValues retrieves the metric by hash and label value +// or creates it and returns the new one. +// +// This function holds the mutex. +func (m *metricMap) getOrCreateMetricWithLabels( + hash uint64, labels Labels, curry []curriedLabelValue, +) Metric { + m.mtx.RLock() + metric, ok := m.getMetricWithHashAndLabels(hash, labels, curry) + m.mtx.RUnlock() + if ok { + return metric + } + + m.mtx.Lock() + defer m.mtx.Unlock() + metric, ok = m.getMetricWithHashAndLabels(hash, labels, curry) + if !ok { + lvs := extractLabelValues(m.desc, labels, curry) + metric = m.newMetric(lvs...) + m.metrics[hash] = append(m.metrics[hash], metricWithLabelValues{values: lvs, metric: metric}) + } + return metric +} + +// getMetricWithHashAndLabelValues gets a metric while handling possible +// collisions in the hash space. Must be called while holding the read mutex. +func (m *metricMap) getMetricWithHashAndLabelValues( + h uint64, lvs []string, curry []curriedLabelValue, +) (Metric, bool) { + metrics, ok := m.metrics[h] + if ok { + if i := findMetricWithLabelValues(metrics, lvs, curry); i < len(metrics) { + return metrics[i].metric, true + } + } + return nil, false +} + +// getMetricWithHashAndLabels gets a metric while handling possible collisions in +// the hash space. Must be called while holding read mutex. +func (m *metricMap) getMetricWithHashAndLabels( + h uint64, labels Labels, curry []curriedLabelValue, +) (Metric, bool) { + metrics, ok := m.metrics[h] + if ok { + if i := findMetricWithLabels(m.desc, metrics, labels, curry); i < len(metrics) { + return metrics[i].metric, true + } + } + return nil, false +} + +// findMetricWithLabelValues returns the index of the matching metric or +// len(metrics) if not found. +func findMetricWithLabelValues( + metrics []metricWithLabelValues, lvs []string, curry []curriedLabelValue, +) int { + for i, metric := range metrics { + if matchLabelValues(metric.values, lvs, curry) { + return i + } + } + return len(metrics) +} + +// findMetricWithLabels returns the index of the matching metric or len(metrics) +// if not found. +func findMetricWithLabels( + desc *Desc, metrics []metricWithLabelValues, labels Labels, curry []curriedLabelValue, +) int { + for i, metric := range metrics { + if matchLabels(desc, metric.values, labels, curry) { + return i + } + } + return len(metrics) +} + +func matchLabelValues(values []string, lvs []string, curry []curriedLabelValue) bool { + if len(values) != len(lvs)+len(curry) { + return false + } + var iLVs, iCurry int + for i, v := range values { + if iCurry < len(curry) && curry[iCurry].index == i { + if v != curry[iCurry].value { + return false + } + iCurry++ + continue + } + if v != lvs[iLVs] { + return false + } + iLVs++ + } + return true +} + +func matchLabels(desc *Desc, values []string, labels Labels, curry []curriedLabelValue) bool { + if len(values) != len(labels)+len(curry) { + return false + } + iCurry := 0 + for i, k := range desc.variableLabels { + if iCurry < len(curry) && curry[iCurry].index == i { + if values[i] != curry[iCurry].value { + return false + } + iCurry++ + continue + } + if values[i] != labels[k] { + return false + } + } + return true +} + +func extractLabelValues(desc *Desc, labels Labels, curry []curriedLabelValue) []string { + labelValues := make([]string, len(labels)+len(curry)) + iCurry := 0 + for i, k := range desc.variableLabels { + if iCurry < len(curry) && curry[iCurry].index == i { + labelValues[i] = curry[iCurry].value + iCurry++ + continue + } + labelValues[i] = labels[k] + } + return labelValues +} + +func inlineLabelValues(lvs []string, curry []curriedLabelValue) []string { + labelValues := make([]string, len(lvs)+len(curry)) + var iCurry, iLVs int + for i := range labelValues { + if iCurry < len(curry) && curry[iCurry].index == i { + labelValues[i] = curry[iCurry].value + iCurry++ + continue + } + labelValues[i] = lvs[iLVs] + iLVs++ + } + return labelValues +} diff --git a/vendor/github.com/prometheus/client_golang/prometheus/wrap.go b/vendor/github.com/prometheus/client_golang/prometheus/wrap.go new file mode 100644 index 00000000..438aa5e9 --- /dev/null +++ b/vendor/github.com/prometheus/client_golang/prometheus/wrap.go @@ -0,0 +1,212 @@ +// Copyright 2018 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package prometheus + +import ( + "fmt" + "sort" + + //lint:ignore SA1019 Need to keep deprecated package for compatibility. + "github.com/golang/protobuf/proto" + + dto "github.com/prometheus/client_model/go" +) + +// WrapRegistererWith returns a Registerer wrapping the provided +// Registerer. Collectors registered with the returned Registerer will be +// registered with the wrapped Registerer in a modified way. The modified +// Collector adds the provided Labels to all Metrics it collects (as +// ConstLabels). The Metrics collected by the unmodified Collector must not +// duplicate any of those labels. Wrapping a nil value is valid, resulting +// in a no-op Registerer. +// +// WrapRegistererWith provides a way to add fixed labels to a subset of +// Collectors. It should not be used to add fixed labels to all metrics exposed. +// +// Conflicts between Collectors registered through the original Registerer with +// Collectors registered through the wrapping Registerer will still be +// detected. Any AlreadyRegisteredError returned by the Register method of +// either Registerer will contain the ExistingCollector in the form it was +// provided to the respective registry. +// +// The Collector example demonstrates a use of WrapRegistererWith. +func WrapRegistererWith(labels Labels, reg Registerer) Registerer { + return &wrappingRegisterer{ + wrappedRegisterer: reg, + labels: labels, + } +} + +// WrapRegistererWithPrefix returns a Registerer wrapping the provided +// Registerer. Collectors registered with the returned Registerer will be +// registered with the wrapped Registerer in a modified way. The modified +// Collector adds the provided prefix to the name of all Metrics it collects. +// Wrapping a nil value is valid, resulting in a no-op Registerer. +// +// WrapRegistererWithPrefix is useful to have one place to prefix all metrics of +// a sub-system. To make this work, register metrics of the sub-system with the +// wrapping Registerer returned by WrapRegistererWithPrefix. It is rarely useful +// to use the same prefix for all metrics exposed. In particular, do not prefix +// metric names that are standardized across applications, as that would break +// horizontal monitoring, for example the metrics provided by the Go collector +// (see NewGoCollector) and the process collector (see NewProcessCollector). (In +// fact, those metrics are already prefixed with “go_” or “process_”, +// respectively.) +// +// Conflicts between Collectors registered through the original Registerer with +// Collectors registered through the wrapping Registerer will still be +// detected. Any AlreadyRegisteredError returned by the Register method of +// either Registerer will contain the ExistingCollector in the form it was +// provided to the respective registry. +func WrapRegistererWithPrefix(prefix string, reg Registerer) Registerer { + return &wrappingRegisterer{ + wrappedRegisterer: reg, + prefix: prefix, + } +} + +type wrappingRegisterer struct { + wrappedRegisterer Registerer + prefix string + labels Labels +} + +func (r *wrappingRegisterer) Register(c Collector) error { + if r.wrappedRegisterer == nil { + return nil + } + return r.wrappedRegisterer.Register(&wrappingCollector{ + wrappedCollector: c, + prefix: r.prefix, + labels: r.labels, + }) +} + +func (r *wrappingRegisterer) MustRegister(cs ...Collector) { + if r.wrappedRegisterer == nil { + return + } + for _, c := range cs { + if err := r.Register(c); err != nil { + panic(err) + } + } +} + +func (r *wrappingRegisterer) Unregister(c Collector) bool { + if r.wrappedRegisterer == nil { + return false + } + return r.wrappedRegisterer.Unregister(&wrappingCollector{ + wrappedCollector: c, + prefix: r.prefix, + labels: r.labels, + }) +} + +type wrappingCollector struct { + wrappedCollector Collector + prefix string + labels Labels +} + +func (c *wrappingCollector) Collect(ch chan<- Metric) { + wrappedCh := make(chan Metric) + go func() { + c.wrappedCollector.Collect(wrappedCh) + close(wrappedCh) + }() + for m := range wrappedCh { + ch <- &wrappingMetric{ + wrappedMetric: m, + prefix: c.prefix, + labels: c.labels, + } + } +} + +func (c *wrappingCollector) Describe(ch chan<- *Desc) { + wrappedCh := make(chan *Desc) + go func() { + c.wrappedCollector.Describe(wrappedCh) + close(wrappedCh) + }() + for desc := range wrappedCh { + ch <- wrapDesc(desc, c.prefix, c.labels) + } +} + +func (c *wrappingCollector) unwrapRecursively() Collector { + switch wc := c.wrappedCollector.(type) { + case *wrappingCollector: + return wc.unwrapRecursively() + default: + return wc + } +} + +type wrappingMetric struct { + wrappedMetric Metric + prefix string + labels Labels +} + +func (m *wrappingMetric) Desc() *Desc { + return wrapDesc(m.wrappedMetric.Desc(), m.prefix, m.labels) +} + +func (m *wrappingMetric) Write(out *dto.Metric) error { + if err := m.wrappedMetric.Write(out); err != nil { + return err + } + if len(m.labels) == 0 { + // No wrapping labels. + return nil + } + for ln, lv := range m.labels { + out.Label = append(out.Label, &dto.LabelPair{ + Name: proto.String(ln), + Value: proto.String(lv), + }) + } + sort.Sort(labelPairSorter(out.Label)) + return nil +} + +func wrapDesc(desc *Desc, prefix string, labels Labels) *Desc { + constLabels := Labels{} + for _, lp := range desc.constLabelPairs { + constLabels[*lp.Name] = *lp.Value + } + for ln, lv := range labels { + if _, alreadyUsed := constLabels[ln]; alreadyUsed { + return &Desc{ + fqName: desc.fqName, + help: desc.help, + variableLabels: desc.variableLabels, + constLabelPairs: desc.constLabelPairs, + err: fmt.Errorf("attempted wrapping with already existing label name %q", ln), + } + } + constLabels[ln] = lv + } + // NewDesc will do remaining validations. + newDesc := NewDesc(prefix+desc.fqName, desc.help, desc.variableLabels, constLabels) + // Propagate errors if there was any. This will override any errer + // created by NewDesc above, i.e. earlier errors get precedence. + if desc.err != nil { + newDesc.err = desc.err + } + return newDesc +} diff --git a/vendor/github.com/prometheus/client_model/LICENSE b/vendor/github.com/prometheus/client_model/LICENSE new file mode 100644 index 00000000..261eeb9e --- /dev/null +++ b/vendor/github.com/prometheus/client_model/LICENSE @@ -0,0 +1,201 @@ + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + + TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + + 1. Definitions. + + "License" shall mean the terms and conditions for use, reproduction, + and distribution as defined by Sections 1 through 9 of this document. + + "Licensor" shall mean the copyright owner or entity authorized by + the copyright owner that is granting the License. + + "Legal Entity" shall mean the union of the acting entity and all + other entities that control, are controlled by, or are under common + control with that entity. For the purposes of this definition, + "control" means (i) the power, direct or indirect, to cause the + direction or management of such entity, whether by contract or + otherwise, or (ii) ownership of fifty percent (50%) or more of the + outstanding shares, or (iii) beneficial ownership of such entity. + + "You" (or "Your") shall mean an individual or Legal Entity + exercising permissions granted by this License. + + "Source" form shall mean the preferred form for making modifications, + including but not limited to software source code, documentation + source, and configuration files. + + "Object" form shall mean any form resulting from mechanical + transformation or translation of a Source form, including but + not limited to compiled object code, generated documentation, + and conversions to other media types. + + "Work" shall mean the work of authorship, whether in Source or + Object form, made available under the License, as indicated by a + copyright notice that is included in or attached to the work + (an example is provided in the Appendix below). + + "Derivative Works" shall mean any work, whether in Source or Object + form, that is based on (or derived from) the Work and for which the + editorial revisions, annotations, elaborations, or other modifications + represent, as a whole, an original work of authorship. For the purposes + of this License, Derivative Works shall not include works that remain + separable from, or merely link (or bind by name) to the interfaces of, + the Work and Derivative Works thereof. + + "Contribution" shall mean any work of authorship, including + the original version of the Work and any modifications or additions + to that Work or Derivative Works thereof, that is intentionally + submitted to Licensor for inclusion in the Work by the copyright owner + or by an individual or Legal Entity authorized to submit on behalf of + the copyright owner. For the purposes of this definition, "submitted" + means any form of electronic, verbal, or written communication sent + to the Licensor or its representatives, including but not limited to + communication on electronic mailing lists, source code control systems, + and issue tracking systems that are managed by, or on behalf of, the + Licensor for the purpose of discussing and improving the Work, but + excluding communication that is conspicuously marked or otherwise + designated in writing by the copyright owner as "Not a Contribution." + + "Contributor" shall mean Licensor and any individual or Legal Entity + on behalf of whom a Contribution has been received by Licensor and + subsequently incorporated within the Work. + + 2. Grant of Copyright License. Subject to the terms and conditions of + this License, each Contributor hereby grants to You a perpetual, + worldwide, non-exclusive, no-charge, royalty-free, irrevocable + copyright license to reproduce, prepare Derivative Works of, + publicly display, publicly perform, sublicense, and distribute the + Work and such Derivative Works in Source or Object form. + + 3. Grant of Patent License. Subject to the terms and conditions of + this License, each Contributor hereby grants to You a perpetual, + worldwide, non-exclusive, no-charge, royalty-free, irrevocable + (except as stated in this section) patent license to make, have made, + use, offer to sell, sell, import, and otherwise transfer the Work, + where such license applies only to those patent claims licensable + by such Contributor that are necessarily infringed by their + Contribution(s) alone or by combination of their Contribution(s) + with the Work to which such Contribution(s) was submitted. If You + institute patent litigation against any entity (including a + cross-claim or counterclaim in a lawsuit) alleging that the Work + or a Contribution incorporated within the Work constitutes direct + or contributory patent infringement, then any patent licenses + granted to You under this License for that Work shall terminate + as of the date such litigation is filed. + + 4. Redistribution. You may reproduce and distribute copies of the + Work or Derivative Works thereof in any medium, with or without + modifications, and in Source or Object form, provided that You + meet the following conditions: + + (a) You must give any other recipients of the Work or + Derivative Works a copy of this License; and + + (b) You must cause any modified files to carry prominent notices + stating that You changed the files; and + + (c) You must retain, in the Source form of any Derivative Works + that You distribute, all copyright, patent, trademark, and + attribution notices from the Source form of the Work, + excluding those notices that do not pertain to any part of + the Derivative Works; and + + (d) If the Work includes a "NOTICE" text file as part of its + distribution, then any Derivative Works that You distribute must + include a readable copy of the attribution notices contained + within such NOTICE file, excluding those notices that do not + pertain to any part of the Derivative Works, in at least one + of the following places: within a NOTICE text file distributed + as part of the Derivative Works; within the Source form or + documentation, if provided along with the Derivative Works; or, + within a display generated by the Derivative Works, if and + wherever such third-party notices normally appear. The contents + of the NOTICE file are for informational purposes only and + do not modify the License. You may add Your own attribution + notices within Derivative Works that You distribute, alongside + or as an addendum to the NOTICE text from the Work, provided + that such additional attribution notices cannot be construed + as modifying the License. + + You may add Your own copyright statement to Your modifications and + may provide additional or different license terms and conditions + for use, reproduction, or distribution of Your modifications, or + for any such Derivative Works as a whole, provided Your use, + reproduction, and distribution of the Work otherwise complies with + the conditions stated in this License. + + 5. Submission of Contributions. Unless You explicitly state otherwise, + any Contribution intentionally submitted for inclusion in the Work + by You to the Licensor shall be under the terms and conditions of + this License, without any additional terms or conditions. + Notwithstanding the above, nothing herein shall supersede or modify + the terms of any separate license agreement you may have executed + with Licensor regarding such Contributions. + + 6. Trademarks. This License does not grant permission to use the trade + names, trademarks, service marks, or product names of the Licensor, + except as required for reasonable and customary use in describing the + origin of the Work and reproducing the content of the NOTICE file. + + 7. Disclaimer of Warranty. Unless required by applicable law or + agreed to in writing, Licensor provides the Work (and each + Contributor provides its Contributions) on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or + implied, including, without limitation, any warranties or conditions + of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A + PARTICULAR PURPOSE. You are solely responsible for determining the + appropriateness of using or redistributing the Work and assume any + risks associated with Your exercise of permissions under this License. + + 8. Limitation of Liability. In no event and under no legal theory, + whether in tort (including negligence), contract, or otherwise, + unless required by applicable law (such as deliberate and grossly + negligent acts) or agreed to in writing, shall any Contributor be + liable to You for damages, including any direct, indirect, special, + incidental, or consequential damages of any character arising as a + result of this License or out of the use or inability to use the + Work (including but not limited to damages for loss of goodwill, + work stoppage, computer failure or malfunction, or any and all + other commercial damages or losses), even if such Contributor + has been advised of the possibility of such damages. + + 9. Accepting Warranty or Additional Liability. While redistributing + the Work or Derivative Works thereof, You may choose to offer, + and charge a fee for, acceptance of support, warranty, indemnity, + or other liability obligations and/or rights consistent with this + License. However, in accepting such obligations, You may act only + on Your own behalf and on Your sole responsibility, not on behalf + of any other Contributor, and only if You agree to indemnify, + defend, and hold each Contributor harmless for any liability + incurred by, or claims asserted against, such Contributor by reason + of your accepting any such warranty or additional liability. + + END OF TERMS AND CONDITIONS + + APPENDIX: How to apply the Apache License to your work. + + To apply the Apache License to your work, attach the following + boilerplate notice, with the fields enclosed by brackets "[]" + replaced with your own identifying information. (Don't include + the brackets!) The text should be enclosed in the appropriate + comment syntax for the file format. We also recommend that a + file or class name and description of purpose be included on the + same "printed page" as the copyright notice for easier + identification within third-party archives. + + Copyright [yyyy] [name of copyright owner] + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. diff --git a/vendor/github.com/prometheus/client_model/NOTICE b/vendor/github.com/prometheus/client_model/NOTICE new file mode 100644 index 00000000..20110e41 --- /dev/null +++ b/vendor/github.com/prometheus/client_model/NOTICE @@ -0,0 +1,5 @@ +Data model artifacts for Prometheus. +Copyright 2012-2015 The Prometheus Authors + +This product includes software developed at +SoundCloud Ltd. (http://soundcloud.com/). diff --git a/vendor/github.com/prometheus/client_model/go/metrics.pb.go b/vendor/github.com/prometheus/client_model/go/metrics.pb.go new file mode 100644 index 00000000..2f4930d9 --- /dev/null +++ b/vendor/github.com/prometheus/client_model/go/metrics.pb.go @@ -0,0 +1,723 @@ +// Code generated by protoc-gen-go. DO NOT EDIT. +// source: metrics.proto + +package io_prometheus_client + +import ( + fmt "fmt" + proto "github.com/golang/protobuf/proto" + timestamp "github.com/golang/protobuf/ptypes/timestamp" + math "math" +) + +// Reference imports to suppress errors if they are not otherwise used. +var _ = proto.Marshal +var _ = fmt.Errorf +var _ = math.Inf + +// This is a compile-time assertion to ensure that this generated file +// is compatible with the proto package it is being compiled against. +// A compilation error at this line likely means your copy of the +// proto package needs to be updated. +const _ = proto.ProtoPackageIsVersion3 // please upgrade the proto package + +type MetricType int32 + +const ( + MetricType_COUNTER MetricType = 0 + MetricType_GAUGE MetricType = 1 + MetricType_SUMMARY MetricType = 2 + MetricType_UNTYPED MetricType = 3 + MetricType_HISTOGRAM MetricType = 4 +) + +var MetricType_name = map[int32]string{ + 0: "COUNTER", + 1: "GAUGE", + 2: "SUMMARY", + 3: "UNTYPED", + 4: "HISTOGRAM", +} + +var MetricType_value = map[string]int32{ + "COUNTER": 0, + "GAUGE": 1, + "SUMMARY": 2, + "UNTYPED": 3, + "HISTOGRAM": 4, +} + +func (x MetricType) Enum() *MetricType { + p := new(MetricType) + *p = x + return p +} + +func (x MetricType) String() string { + return proto.EnumName(MetricType_name, int32(x)) +} + +func (x *MetricType) UnmarshalJSON(data []byte) error { + value, err := proto.UnmarshalJSONEnum(MetricType_value, data, "MetricType") + if err != nil { + return err + } + *x = MetricType(value) + return nil +} + +func (MetricType) EnumDescriptor() ([]byte, []int) { + return fileDescriptor_6039342a2ba47b72, []int{0} +} + +type LabelPair struct { + Name *string `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"` + Value *string `protobuf:"bytes,2,opt,name=value" json:"value,omitempty"` + XXX_NoUnkeyedLiteral struct{} `json:"-"` + XXX_unrecognized []byte `json:"-"` + XXX_sizecache int32 `json:"-"` +} + +func (m *LabelPair) Reset() { *m = LabelPair{} } +func (m *LabelPair) String() string { return proto.CompactTextString(m) } +func (*LabelPair) ProtoMessage() {} +func (*LabelPair) Descriptor() ([]byte, []int) { + return fileDescriptor_6039342a2ba47b72, []int{0} +} + +func (m *LabelPair) XXX_Unmarshal(b []byte) error { + return xxx_messageInfo_LabelPair.Unmarshal(m, b) +} +func (m *LabelPair) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) { + return xxx_messageInfo_LabelPair.Marshal(b, m, deterministic) +} +func (m *LabelPair) XXX_Merge(src proto.Message) { + xxx_messageInfo_LabelPair.Merge(m, src) +} +func (m *LabelPair) XXX_Size() int { + return xxx_messageInfo_LabelPair.Size(m) +} +func (m *LabelPair) XXX_DiscardUnknown() { + xxx_messageInfo_LabelPair.DiscardUnknown(m) +} + +var xxx_messageInfo_LabelPair proto.InternalMessageInfo + +func (m *LabelPair) GetName() string { + if m != nil && m.Name != nil { + return *m.Name + } + return "" +} + +func (m *LabelPair) GetValue() string { + if m != nil && m.Value != nil { + return *m.Value + } + return "" +} + +type Gauge struct { + Value *float64 `protobuf:"fixed64,1,opt,name=value" json:"value,omitempty"` + XXX_NoUnkeyedLiteral struct{} `json:"-"` + XXX_unrecognized []byte `json:"-"` + XXX_sizecache int32 `json:"-"` +} + +func (m *Gauge) Reset() { *m = Gauge{} } +func (m *Gauge) String() string { return proto.CompactTextString(m) } +func (*Gauge) ProtoMessage() {} +func (*Gauge) Descriptor() ([]byte, []int) { + return fileDescriptor_6039342a2ba47b72, []int{1} +} + +func (m *Gauge) XXX_Unmarshal(b []byte) error { + return xxx_messageInfo_Gauge.Unmarshal(m, b) +} +func (m *Gauge) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) { + return xxx_messageInfo_Gauge.Marshal(b, m, deterministic) +} +func (m *Gauge) XXX_Merge(src proto.Message) { + xxx_messageInfo_Gauge.Merge(m, src) +} +func (m *Gauge) XXX_Size() int { + return xxx_messageInfo_Gauge.Size(m) +} +func (m *Gauge) XXX_DiscardUnknown() { + xxx_messageInfo_Gauge.DiscardUnknown(m) +} + +var xxx_messageInfo_Gauge proto.InternalMessageInfo + +func (m *Gauge) GetValue() float64 { + if m != nil && m.Value != nil { + return *m.Value + } + return 0 +} + +type Counter struct { + Value *float64 `protobuf:"fixed64,1,opt,name=value" json:"value,omitempty"` + Exemplar *Exemplar `protobuf:"bytes,2,opt,name=exemplar" json:"exemplar,omitempty"` + XXX_NoUnkeyedLiteral struct{} `json:"-"` + XXX_unrecognized []byte `json:"-"` + XXX_sizecache int32 `json:"-"` +} + +func (m *Counter) Reset() { *m = Counter{} } +func (m *Counter) String() string { return proto.CompactTextString(m) } +func (*Counter) ProtoMessage() {} +func (*Counter) Descriptor() ([]byte, []int) { + return fileDescriptor_6039342a2ba47b72, []int{2} +} + +func (m *Counter) XXX_Unmarshal(b []byte) error { + return xxx_messageInfo_Counter.Unmarshal(m, b) +} +func (m *Counter) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) { + return xxx_messageInfo_Counter.Marshal(b, m, deterministic) +} +func (m *Counter) XXX_Merge(src proto.Message) { + xxx_messageInfo_Counter.Merge(m, src) +} +func (m *Counter) XXX_Size() int { + return xxx_messageInfo_Counter.Size(m) +} +func (m *Counter) XXX_DiscardUnknown() { + xxx_messageInfo_Counter.DiscardUnknown(m) +} + +var xxx_messageInfo_Counter proto.InternalMessageInfo + +func (m *Counter) GetValue() float64 { + if m != nil && m.Value != nil { + return *m.Value + } + return 0 +} + +func (m *Counter) GetExemplar() *Exemplar { + if m != nil { + return m.Exemplar + } + return nil +} + +type Quantile struct { + Quantile *float64 `protobuf:"fixed64,1,opt,name=quantile" json:"quantile,omitempty"` + Value *float64 `protobuf:"fixed64,2,opt,name=value" json:"value,omitempty"` + XXX_NoUnkeyedLiteral struct{} `json:"-"` + XXX_unrecognized []byte `json:"-"` + XXX_sizecache int32 `json:"-"` +} + +func (m *Quantile) Reset() { *m = Quantile{} } +func (m *Quantile) String() string { return proto.CompactTextString(m) } +func (*Quantile) ProtoMessage() {} +func (*Quantile) Descriptor() ([]byte, []int) { + return fileDescriptor_6039342a2ba47b72, []int{3} +} + +func (m *Quantile) XXX_Unmarshal(b []byte) error { + return xxx_messageInfo_Quantile.Unmarshal(m, b) +} +func (m *Quantile) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) { + return xxx_messageInfo_Quantile.Marshal(b, m, deterministic) +} +func (m *Quantile) XXX_Merge(src proto.Message) { + xxx_messageInfo_Quantile.Merge(m, src) +} +func (m *Quantile) XXX_Size() int { + return xxx_messageInfo_Quantile.Size(m) +} +func (m *Quantile) XXX_DiscardUnknown() { + xxx_messageInfo_Quantile.DiscardUnknown(m) +} + +var xxx_messageInfo_Quantile proto.InternalMessageInfo + +func (m *Quantile) GetQuantile() float64 { + if m != nil && m.Quantile != nil { + return *m.Quantile + } + return 0 +} + +func (m *Quantile) GetValue() float64 { + if m != nil && m.Value != nil { + return *m.Value + } + return 0 +} + +type Summary struct { + SampleCount *uint64 `protobuf:"varint,1,opt,name=sample_count,json=sampleCount" json:"sample_count,omitempty"` + SampleSum *float64 `protobuf:"fixed64,2,opt,name=sample_sum,json=sampleSum" json:"sample_sum,omitempty"` + Quantile []*Quantile `protobuf:"bytes,3,rep,name=quantile" json:"quantile,omitempty"` + XXX_NoUnkeyedLiteral struct{} `json:"-"` + XXX_unrecognized []byte `json:"-"` + XXX_sizecache int32 `json:"-"` +} + +func (m *Summary) Reset() { *m = Summary{} } +func (m *Summary) String() string { return proto.CompactTextString(m) } +func (*Summary) ProtoMessage() {} +func (*Summary) Descriptor() ([]byte, []int) { + return fileDescriptor_6039342a2ba47b72, []int{4} +} + +func (m *Summary) XXX_Unmarshal(b []byte) error { + return xxx_messageInfo_Summary.Unmarshal(m, b) +} +func (m *Summary) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) { + return xxx_messageInfo_Summary.Marshal(b, m, deterministic) +} +func (m *Summary) XXX_Merge(src proto.Message) { + xxx_messageInfo_Summary.Merge(m, src) +} +func (m *Summary) XXX_Size() int { + return xxx_messageInfo_Summary.Size(m) +} +func (m *Summary) XXX_DiscardUnknown() { + xxx_messageInfo_Summary.DiscardUnknown(m) +} + +var xxx_messageInfo_Summary proto.InternalMessageInfo + +func (m *Summary) GetSampleCount() uint64 { + if m != nil && m.SampleCount != nil { + return *m.SampleCount + } + return 0 +} + +func (m *Summary) GetSampleSum() float64 { + if m != nil && m.SampleSum != nil { + return *m.SampleSum + } + return 0 +} + +func (m *Summary) GetQuantile() []*Quantile { + if m != nil { + return m.Quantile + } + return nil +} + +type Untyped struct { + Value *float64 `protobuf:"fixed64,1,opt,name=value" json:"value,omitempty"` + XXX_NoUnkeyedLiteral struct{} `json:"-"` + XXX_unrecognized []byte `json:"-"` + XXX_sizecache int32 `json:"-"` +} + +func (m *Untyped) Reset() { *m = Untyped{} } +func (m *Untyped) String() string { return proto.CompactTextString(m) } +func (*Untyped) ProtoMessage() {} +func (*Untyped) Descriptor() ([]byte, []int) { + return fileDescriptor_6039342a2ba47b72, []int{5} +} + +func (m *Untyped) XXX_Unmarshal(b []byte) error { + return xxx_messageInfo_Untyped.Unmarshal(m, b) +} +func (m *Untyped) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) { + return xxx_messageInfo_Untyped.Marshal(b, m, deterministic) +} +func (m *Untyped) XXX_Merge(src proto.Message) { + xxx_messageInfo_Untyped.Merge(m, src) +} +func (m *Untyped) XXX_Size() int { + return xxx_messageInfo_Untyped.Size(m) +} +func (m *Untyped) XXX_DiscardUnknown() { + xxx_messageInfo_Untyped.DiscardUnknown(m) +} + +var xxx_messageInfo_Untyped proto.InternalMessageInfo + +func (m *Untyped) GetValue() float64 { + if m != nil && m.Value != nil { + return *m.Value + } + return 0 +} + +type Histogram struct { + SampleCount *uint64 `protobuf:"varint,1,opt,name=sample_count,json=sampleCount" json:"sample_count,omitempty"` + SampleSum *float64 `protobuf:"fixed64,2,opt,name=sample_sum,json=sampleSum" json:"sample_sum,omitempty"` + Bucket []*Bucket `protobuf:"bytes,3,rep,name=bucket" json:"bucket,omitempty"` + XXX_NoUnkeyedLiteral struct{} `json:"-"` + XXX_unrecognized []byte `json:"-"` + XXX_sizecache int32 `json:"-"` +} + +func (m *Histogram) Reset() { *m = Histogram{} } +func (m *Histogram) String() string { return proto.CompactTextString(m) } +func (*Histogram) ProtoMessage() {} +func (*Histogram) Descriptor() ([]byte, []int) { + return fileDescriptor_6039342a2ba47b72, []int{6} +} + +func (m *Histogram) XXX_Unmarshal(b []byte) error { + return xxx_messageInfo_Histogram.Unmarshal(m, b) +} +func (m *Histogram) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) { + return xxx_messageInfo_Histogram.Marshal(b, m, deterministic) +} +func (m *Histogram) XXX_Merge(src proto.Message) { + xxx_messageInfo_Histogram.Merge(m, src) +} +func (m *Histogram) XXX_Size() int { + return xxx_messageInfo_Histogram.Size(m) +} +func (m *Histogram) XXX_DiscardUnknown() { + xxx_messageInfo_Histogram.DiscardUnknown(m) +} + +var xxx_messageInfo_Histogram proto.InternalMessageInfo + +func (m *Histogram) GetSampleCount() uint64 { + if m != nil && m.SampleCount != nil { + return *m.SampleCount + } + return 0 +} + +func (m *Histogram) GetSampleSum() float64 { + if m != nil && m.SampleSum != nil { + return *m.SampleSum + } + return 0 +} + +func (m *Histogram) GetBucket() []*Bucket { + if m != nil { + return m.Bucket + } + return nil +} + +type Bucket struct { + CumulativeCount *uint64 `protobuf:"varint,1,opt,name=cumulative_count,json=cumulativeCount" json:"cumulative_count,omitempty"` + UpperBound *float64 `protobuf:"fixed64,2,opt,name=upper_bound,json=upperBound" json:"upper_bound,omitempty"` + Exemplar *Exemplar `protobuf:"bytes,3,opt,name=exemplar" json:"exemplar,omitempty"` + XXX_NoUnkeyedLiteral struct{} `json:"-"` + XXX_unrecognized []byte `json:"-"` + XXX_sizecache int32 `json:"-"` +} + +func (m *Bucket) Reset() { *m = Bucket{} } +func (m *Bucket) String() string { return proto.CompactTextString(m) } +func (*Bucket) ProtoMessage() {} +func (*Bucket) Descriptor() ([]byte, []int) { + return fileDescriptor_6039342a2ba47b72, []int{7} +} + +func (m *Bucket) XXX_Unmarshal(b []byte) error { + return xxx_messageInfo_Bucket.Unmarshal(m, b) +} +func (m *Bucket) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) { + return xxx_messageInfo_Bucket.Marshal(b, m, deterministic) +} +func (m *Bucket) XXX_Merge(src proto.Message) { + xxx_messageInfo_Bucket.Merge(m, src) +} +func (m *Bucket) XXX_Size() int { + return xxx_messageInfo_Bucket.Size(m) +} +func (m *Bucket) XXX_DiscardUnknown() { + xxx_messageInfo_Bucket.DiscardUnknown(m) +} + +var xxx_messageInfo_Bucket proto.InternalMessageInfo + +func (m *Bucket) GetCumulativeCount() uint64 { + if m != nil && m.CumulativeCount != nil { + return *m.CumulativeCount + } + return 0 +} + +func (m *Bucket) GetUpperBound() float64 { + if m != nil && m.UpperBound != nil { + return *m.UpperBound + } + return 0 +} + +func (m *Bucket) GetExemplar() *Exemplar { + if m != nil { + return m.Exemplar + } + return nil +} + +type Exemplar struct { + Label []*LabelPair `protobuf:"bytes,1,rep,name=label" json:"label,omitempty"` + Value *float64 `protobuf:"fixed64,2,opt,name=value" json:"value,omitempty"` + Timestamp *timestamp.Timestamp `protobuf:"bytes,3,opt,name=timestamp" json:"timestamp,omitempty"` + XXX_NoUnkeyedLiteral struct{} `json:"-"` + XXX_unrecognized []byte `json:"-"` + XXX_sizecache int32 `json:"-"` +} + +func (m *Exemplar) Reset() { *m = Exemplar{} } +func (m *Exemplar) String() string { return proto.CompactTextString(m) } +func (*Exemplar) ProtoMessage() {} +func (*Exemplar) Descriptor() ([]byte, []int) { + return fileDescriptor_6039342a2ba47b72, []int{8} +} + +func (m *Exemplar) XXX_Unmarshal(b []byte) error { + return xxx_messageInfo_Exemplar.Unmarshal(m, b) +} +func (m *Exemplar) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) { + return xxx_messageInfo_Exemplar.Marshal(b, m, deterministic) +} +func (m *Exemplar) XXX_Merge(src proto.Message) { + xxx_messageInfo_Exemplar.Merge(m, src) +} +func (m *Exemplar) XXX_Size() int { + return xxx_messageInfo_Exemplar.Size(m) +} +func (m *Exemplar) XXX_DiscardUnknown() { + xxx_messageInfo_Exemplar.DiscardUnknown(m) +} + +var xxx_messageInfo_Exemplar proto.InternalMessageInfo + +func (m *Exemplar) GetLabel() []*LabelPair { + if m != nil { + return m.Label + } + return nil +} + +func (m *Exemplar) GetValue() float64 { + if m != nil && m.Value != nil { + return *m.Value + } + return 0 +} + +func (m *Exemplar) GetTimestamp() *timestamp.Timestamp { + if m != nil { + return m.Timestamp + } + return nil +} + +type Metric struct { + Label []*LabelPair `protobuf:"bytes,1,rep,name=label" json:"label,omitempty"` + Gauge *Gauge `protobuf:"bytes,2,opt,name=gauge" json:"gauge,omitempty"` + Counter *Counter `protobuf:"bytes,3,opt,name=counter" json:"counter,omitempty"` + Summary *Summary `protobuf:"bytes,4,opt,name=summary" json:"summary,omitempty"` + Untyped *Untyped `protobuf:"bytes,5,opt,name=untyped" json:"untyped,omitempty"` + Histogram *Histogram `protobuf:"bytes,7,opt,name=histogram" json:"histogram,omitempty"` + TimestampMs *int64 `protobuf:"varint,6,opt,name=timestamp_ms,json=timestampMs" json:"timestamp_ms,omitempty"` + XXX_NoUnkeyedLiteral struct{} `json:"-"` + XXX_unrecognized []byte `json:"-"` + XXX_sizecache int32 `json:"-"` +} + +func (m *Metric) Reset() { *m = Metric{} } +func (m *Metric) String() string { return proto.CompactTextString(m) } +func (*Metric) ProtoMessage() {} +func (*Metric) Descriptor() ([]byte, []int) { + return fileDescriptor_6039342a2ba47b72, []int{9} +} + +func (m *Metric) XXX_Unmarshal(b []byte) error { + return xxx_messageInfo_Metric.Unmarshal(m, b) +} +func (m *Metric) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) { + return xxx_messageInfo_Metric.Marshal(b, m, deterministic) +} +func (m *Metric) XXX_Merge(src proto.Message) { + xxx_messageInfo_Metric.Merge(m, src) +} +func (m *Metric) XXX_Size() int { + return xxx_messageInfo_Metric.Size(m) +} +func (m *Metric) XXX_DiscardUnknown() { + xxx_messageInfo_Metric.DiscardUnknown(m) +} + +var xxx_messageInfo_Metric proto.InternalMessageInfo + +func (m *Metric) GetLabel() []*LabelPair { + if m != nil { + return m.Label + } + return nil +} + +func (m *Metric) GetGauge() *Gauge { + if m != nil { + return m.Gauge + } + return nil +} + +func (m *Metric) GetCounter() *Counter { + if m != nil { + return m.Counter + } + return nil +} + +func (m *Metric) GetSummary() *Summary { + if m != nil { + return m.Summary + } + return nil +} + +func (m *Metric) GetUntyped() *Untyped { + if m != nil { + return m.Untyped + } + return nil +} + +func (m *Metric) GetHistogram() *Histogram { + if m != nil { + return m.Histogram + } + return nil +} + +func (m *Metric) GetTimestampMs() int64 { + if m != nil && m.TimestampMs != nil { + return *m.TimestampMs + } + return 0 +} + +type MetricFamily struct { + Name *string `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"` + Help *string `protobuf:"bytes,2,opt,name=help" json:"help,omitempty"` + Type *MetricType `protobuf:"varint,3,opt,name=type,enum=io.prometheus.client.MetricType" json:"type,omitempty"` + Metric []*Metric `protobuf:"bytes,4,rep,name=metric" json:"metric,omitempty"` + XXX_NoUnkeyedLiteral struct{} `json:"-"` + XXX_unrecognized []byte `json:"-"` + XXX_sizecache int32 `json:"-"` +} + +func (m *MetricFamily) Reset() { *m = MetricFamily{} } +func (m *MetricFamily) String() string { return proto.CompactTextString(m) } +func (*MetricFamily) ProtoMessage() {} +func (*MetricFamily) Descriptor() ([]byte, []int) { + return fileDescriptor_6039342a2ba47b72, []int{10} +} + +func (m *MetricFamily) XXX_Unmarshal(b []byte) error { + return xxx_messageInfo_MetricFamily.Unmarshal(m, b) +} +func (m *MetricFamily) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) { + return xxx_messageInfo_MetricFamily.Marshal(b, m, deterministic) +} +func (m *MetricFamily) XXX_Merge(src proto.Message) { + xxx_messageInfo_MetricFamily.Merge(m, src) +} +func (m *MetricFamily) XXX_Size() int { + return xxx_messageInfo_MetricFamily.Size(m) +} +func (m *MetricFamily) XXX_DiscardUnknown() { + xxx_messageInfo_MetricFamily.DiscardUnknown(m) +} + +var xxx_messageInfo_MetricFamily proto.InternalMessageInfo + +func (m *MetricFamily) GetName() string { + if m != nil && m.Name != nil { + return *m.Name + } + return "" +} + +func (m *MetricFamily) GetHelp() string { + if m != nil && m.Help != nil { + return *m.Help + } + return "" +} + +func (m *MetricFamily) GetType() MetricType { + if m != nil && m.Type != nil { + return *m.Type + } + return MetricType_COUNTER +} + +func (m *MetricFamily) GetMetric() []*Metric { + if m != nil { + return m.Metric + } + return nil +} + +func init() { + proto.RegisterEnum("io.prometheus.client.MetricType", MetricType_name, MetricType_value) + proto.RegisterType((*LabelPair)(nil), "io.prometheus.client.LabelPair") + proto.RegisterType((*Gauge)(nil), "io.prometheus.client.Gauge") + proto.RegisterType((*Counter)(nil), "io.prometheus.client.Counter") + proto.RegisterType((*Quantile)(nil), "io.prometheus.client.Quantile") + proto.RegisterType((*Summary)(nil), "io.prometheus.client.Summary") + proto.RegisterType((*Untyped)(nil), "io.prometheus.client.Untyped") + proto.RegisterType((*Histogram)(nil), "io.prometheus.client.Histogram") + proto.RegisterType((*Bucket)(nil), "io.prometheus.client.Bucket") + proto.RegisterType((*Exemplar)(nil), "io.prometheus.client.Exemplar") + proto.RegisterType((*Metric)(nil), "io.prometheus.client.Metric") + proto.RegisterType((*MetricFamily)(nil), "io.prometheus.client.MetricFamily") +} + +func init() { proto.RegisterFile("metrics.proto", fileDescriptor_6039342a2ba47b72) } + +var fileDescriptor_6039342a2ba47b72 = []byte{ + // 665 bytes of a gzipped FileDescriptorProto + 0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xac, 0x54, 0xcd, 0x6e, 0xd3, 0x4c, + 0x14, 0xfd, 0xdc, 0x38, 0x3f, 0xbe, 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a/vendor/github.com/prometheus/common/LICENSE b/vendor/github.com/prometheus/common/LICENSE new file mode 100644 index 00000000..261eeb9e --- /dev/null +++ b/vendor/github.com/prometheus/common/LICENSE @@ -0,0 +1,201 @@ + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + + TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + + 1. Definitions. + + "License" shall mean the terms and conditions for use, reproduction, + and distribution as defined by Sections 1 through 9 of this document. + + "Licensor" shall mean the copyright owner or entity authorized by + the copyright owner that is granting the License. + + "Legal Entity" shall mean the union of the acting entity and all + other entities that control, are controlled by, or are under common + control with that entity. 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For the purposes + of this License, Derivative Works shall not include works that remain + separable from, or merely link (or bind by name) to the interfaces of, + the Work and Derivative Works thereof. + + "Contribution" shall mean any work of authorship, including + the original version of the Work and any modifications or additions + to that Work or Derivative Works thereof, that is intentionally + submitted to Licensor for inclusion in the Work by the copyright owner + or by an individual or Legal Entity authorized to submit on behalf of + the copyright owner. For the purposes of this definition, "submitted" + means any form of electronic, verbal, or written communication sent + to the Licensor or its representatives, including but not limited to + communication on electronic mailing lists, source code control systems, + and issue tracking systems that are managed by, or on behalf of, the + Licensor for the purpose of discussing and improving the Work, but + excluding communication that is conspicuously marked or otherwise + designated in writing by the copyright owner as "Not a Contribution." + + "Contributor" shall mean Licensor and any individual or Legal Entity + on behalf of whom a Contribution has been received by Licensor and + subsequently incorporated within the Work. + + 2. Grant of Copyright License. Subject to the terms and conditions of + this License, each Contributor hereby grants to You a perpetual, + worldwide, non-exclusive, no-charge, royalty-free, irrevocable + copyright license to reproduce, prepare Derivative Works of, + publicly display, publicly perform, sublicense, and distribute the + Work and such Derivative Works in Source or Object form. + + 3. Grant of Patent License. Subject to the terms and conditions of + this License, each Contributor hereby grants to You a perpetual, + worldwide, non-exclusive, no-charge, royalty-free, irrevocable + (except as stated in this section) patent license to make, have made, + use, offer to sell, sell, import, and otherwise transfer the Work, + where such license applies only to those patent claims licensable + by such Contributor that are necessarily infringed by their + Contribution(s) alone or by combination of their Contribution(s) + with the Work to which such Contribution(s) was submitted. If You + institute patent litigation against any entity (including a + cross-claim or counterclaim in a lawsuit) alleging that the Work + or a Contribution incorporated within the Work constitutes direct + or contributory patent infringement, then any patent licenses + granted to You under this License for that Work shall terminate + as of the date such litigation is filed. + + 4. Redistribution. You may reproduce and distribute copies of the + Work or Derivative Works thereof in any medium, with or without + modifications, and in Source or Object form, provided that You + meet the following conditions: + + (a) You must give any other recipients of the Work or + Derivative Works a copy of this License; and + + (b) You must cause any modified files to carry prominent notices + stating that You changed the files; and + + (c) You must retain, in the Source form of any Derivative Works + that You distribute, all copyright, patent, trademark, and + attribution notices from the Source form of the Work, + excluding those notices that do not pertain to any part of + the Derivative Works; and + + (d) If the Work includes a "NOTICE" text file as part of its + distribution, then any Derivative Works that You distribute must + include a readable copy of the attribution notices contained + within such NOTICE file, excluding those notices that do not + pertain to any part of the Derivative Works, in at least one + of the following places: within a NOTICE text file distributed + as part of the Derivative Works; within the Source form or + documentation, if provided along with the Derivative Works; or, + within a display generated by the Derivative Works, if and + wherever such third-party notices normally appear. The contents + of the NOTICE file are for informational purposes only and + do not modify the License. You may add Your own attribution + notices within Derivative Works that You distribute, alongside + or as an addendum to the NOTICE text from the Work, provided + that such additional attribution notices cannot be construed + as modifying the License. + + You may add Your own copyright statement to Your modifications and + may provide additional or different license terms and conditions + for use, reproduction, or distribution of Your modifications, or + for any such Derivative Works as a whole, provided Your use, + reproduction, and distribution of the Work otherwise complies with + the conditions stated in this License. + + 5. Submission of Contributions. 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However, in accepting such obligations, You may act only + on Your own behalf and on Your sole responsibility, not on behalf + of any other Contributor, and only if You agree to indemnify, + defend, and hold each Contributor harmless for any liability + incurred by, or claims asserted against, such Contributor by reason + of your accepting any such warranty or additional liability. + + END OF TERMS AND CONDITIONS + + APPENDIX: How to apply the Apache License to your work. + + To apply the Apache License to your work, attach the following + boilerplate notice, with the fields enclosed by brackets "[]" + replaced with your own identifying information. (Don't include + the brackets!) The text should be enclosed in the appropriate + comment syntax for the file format. We also recommend that a + file or class name and description of purpose be included on the + same "printed page" as the copyright notice for easier + identification within third-party archives. + + Copyright [yyyy] [name of copyright owner] + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. diff --git a/vendor/github.com/prometheus/common/NOTICE b/vendor/github.com/prometheus/common/NOTICE new file mode 100644 index 00000000..636a2c1a --- /dev/null +++ b/vendor/github.com/prometheus/common/NOTICE @@ -0,0 +1,5 @@ +Common libraries shared by Prometheus Go components. +Copyright 2015 The Prometheus Authors + +This product includes software developed at +SoundCloud Ltd. (http://soundcloud.com/). diff --git a/vendor/github.com/prometheus/common/expfmt/decode.go b/vendor/github.com/prometheus/common/expfmt/decode.go new file mode 100644 index 00000000..c092723e --- /dev/null +++ b/vendor/github.com/prometheus/common/expfmt/decode.go @@ -0,0 +1,429 @@ +// Copyright 2015 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package expfmt + +import ( + "fmt" + "io" + "math" + "mime" + "net/http" + + dto "github.com/prometheus/client_model/go" + + "github.com/matttproud/golang_protobuf_extensions/pbutil" + "github.com/prometheus/common/model" +) + +// Decoder types decode an input stream into metric families. +type Decoder interface { + Decode(*dto.MetricFamily) error +} + +// DecodeOptions contains options used by the Decoder and in sample extraction. +type DecodeOptions struct { + // Timestamp is added to each value from the stream that has no explicit timestamp set. + Timestamp model.Time +} + +// ResponseFormat extracts the correct format from a HTTP response header. +// If no matching format can be found FormatUnknown is returned. +func ResponseFormat(h http.Header) Format { + ct := h.Get(hdrContentType) + + mediatype, params, err := mime.ParseMediaType(ct) + if err != nil { + return FmtUnknown + } + + const textType = "text/plain" + + switch mediatype { + case ProtoType: + if p, ok := params["proto"]; ok && p != ProtoProtocol { + return FmtUnknown + } + if e, ok := params["encoding"]; ok && e != "delimited" { + return FmtUnknown + } + return FmtProtoDelim + + case textType: + if v, ok := params["version"]; ok && v != TextVersion { + return FmtUnknown + } + return FmtText + } + + return FmtUnknown +} + +// NewDecoder returns a new decoder based on the given input format. +// If the input format does not imply otherwise, a text format decoder is returned. +func NewDecoder(r io.Reader, format Format) Decoder { + switch format { + case FmtProtoDelim: + return &protoDecoder{r: r} + } + return &textDecoder{r: r} +} + +// protoDecoder implements the Decoder interface for protocol buffers. +type protoDecoder struct { + r io.Reader +} + +// Decode implements the Decoder interface. +func (d *protoDecoder) Decode(v *dto.MetricFamily) error { + _, err := pbutil.ReadDelimited(d.r, v) + if err != nil { + return err + } + if !model.IsValidMetricName(model.LabelValue(v.GetName())) { + return fmt.Errorf("invalid metric name %q", v.GetName()) + } + for _, m := range v.GetMetric() { + if m == nil { + continue + } + for _, l := range m.GetLabel() { + if l == nil { + continue + } + if !model.LabelValue(l.GetValue()).IsValid() { + return fmt.Errorf("invalid label value %q", l.GetValue()) + } + if !model.LabelName(l.GetName()).IsValid() { + return fmt.Errorf("invalid label name %q", l.GetName()) + } + } + } + return nil +} + +// textDecoder implements the Decoder interface for the text protocol. +type textDecoder struct { + r io.Reader + p TextParser + fams []*dto.MetricFamily +} + +// Decode implements the Decoder interface. +func (d *textDecoder) Decode(v *dto.MetricFamily) error { + // TODO(fabxc): Wrap this as a line reader to make streaming safer. + if len(d.fams) == 0 { + // No cached metric families, read everything and parse metrics. + fams, err := d.p.TextToMetricFamilies(d.r) + if err != nil { + return err + } + if len(fams) == 0 { + return io.EOF + } + d.fams = make([]*dto.MetricFamily, 0, len(fams)) + for _, f := range fams { + d.fams = append(d.fams, f) + } + } + + *v = *d.fams[0] + d.fams = d.fams[1:] + + return nil +} + +// SampleDecoder wraps a Decoder to extract samples from the metric families +// decoded by the wrapped Decoder. +type SampleDecoder struct { + Dec Decoder + Opts *DecodeOptions + + f dto.MetricFamily +} + +// Decode calls the Decode method of the wrapped Decoder and then extracts the +// samples from the decoded MetricFamily into the provided model.Vector. +func (sd *SampleDecoder) Decode(s *model.Vector) error { + err := sd.Dec.Decode(&sd.f) + if err != nil { + return err + } + *s, err = extractSamples(&sd.f, sd.Opts) + return err +} + +// ExtractSamples builds a slice of samples from the provided metric +// families. If an error occurrs during sample extraction, it continues to +// extract from the remaining metric families. The returned error is the last +// error that has occurred. +func ExtractSamples(o *DecodeOptions, fams ...*dto.MetricFamily) (model.Vector, error) { + var ( + all model.Vector + lastErr error + ) + for _, f := range fams { + some, err := extractSamples(f, o) + if err != nil { + lastErr = err + continue + } + all = append(all, some...) + } + return all, lastErr +} + +func extractSamples(f *dto.MetricFamily, o *DecodeOptions) (model.Vector, error) { + switch f.GetType() { + case dto.MetricType_COUNTER: + return extractCounter(o, f), nil + case dto.MetricType_GAUGE: + return extractGauge(o, f), nil + case dto.MetricType_SUMMARY: + return extractSummary(o, f), nil + case dto.MetricType_UNTYPED: + return extractUntyped(o, f), nil + case dto.MetricType_HISTOGRAM: + return extractHistogram(o, f), nil + } + return nil, fmt.Errorf("expfmt.extractSamples: unknown metric family type %v", f.GetType()) +} + +func extractCounter(o *DecodeOptions, f *dto.MetricFamily) model.Vector { + samples := make(model.Vector, 0, len(f.Metric)) + + for _, m := range f.Metric { + if m.Counter == nil { + continue + } + + lset := make(model.LabelSet, len(m.Label)+1) + for _, p := range m.Label { + lset[model.LabelName(p.GetName())] = model.LabelValue(p.GetValue()) + } + lset[model.MetricNameLabel] = model.LabelValue(f.GetName()) + + smpl := &model.Sample{ + Metric: model.Metric(lset), + Value: model.SampleValue(m.Counter.GetValue()), + } + + if m.TimestampMs != nil { + smpl.Timestamp = model.TimeFromUnixNano(*m.TimestampMs * 1000000) + } else { + smpl.Timestamp = o.Timestamp + } + + samples = append(samples, smpl) + } + + return samples +} + +func extractGauge(o *DecodeOptions, f *dto.MetricFamily) model.Vector { + samples := make(model.Vector, 0, len(f.Metric)) + + for _, m := range f.Metric { + if m.Gauge == nil { + continue + } + + lset := make(model.LabelSet, len(m.Label)+1) + for _, p := range m.Label { + lset[model.LabelName(p.GetName())] = model.LabelValue(p.GetValue()) + } + lset[model.MetricNameLabel] = model.LabelValue(f.GetName()) + + smpl := &model.Sample{ + Metric: model.Metric(lset), + Value: model.SampleValue(m.Gauge.GetValue()), + } + + if m.TimestampMs != nil { + smpl.Timestamp = model.TimeFromUnixNano(*m.TimestampMs * 1000000) + } else { + smpl.Timestamp = o.Timestamp + } + + samples = append(samples, smpl) + } + + return samples +} + +func extractUntyped(o *DecodeOptions, f *dto.MetricFamily) model.Vector { + samples := make(model.Vector, 0, len(f.Metric)) + + for _, m := range f.Metric { + if m.Untyped == nil { + continue + } + + lset := make(model.LabelSet, len(m.Label)+1) + for _, p := range m.Label { + lset[model.LabelName(p.GetName())] = model.LabelValue(p.GetValue()) + } + lset[model.MetricNameLabel] = model.LabelValue(f.GetName()) + + smpl := &model.Sample{ + Metric: model.Metric(lset), + Value: model.SampleValue(m.Untyped.GetValue()), + } + + if m.TimestampMs != nil { + smpl.Timestamp = model.TimeFromUnixNano(*m.TimestampMs * 1000000) + } else { + smpl.Timestamp = o.Timestamp + } + + samples = append(samples, smpl) + } + + return samples +} + +func extractSummary(o *DecodeOptions, f *dto.MetricFamily) model.Vector { + samples := make(model.Vector, 0, len(f.Metric)) + + for _, m := range f.Metric { + if m.Summary == nil { + continue + } + + timestamp := o.Timestamp + if m.TimestampMs != nil { + timestamp = model.TimeFromUnixNano(*m.TimestampMs * 1000000) + } + + for _, q := range m.Summary.Quantile { + lset := make(model.LabelSet, len(m.Label)+2) + for _, p := range m.Label { + lset[model.LabelName(p.GetName())] = model.LabelValue(p.GetValue()) + } + // BUG(matt): Update other names to "quantile". + lset[model.LabelName(model.QuantileLabel)] = model.LabelValue(fmt.Sprint(q.GetQuantile())) + lset[model.MetricNameLabel] = model.LabelValue(f.GetName()) + + samples = append(samples, &model.Sample{ + Metric: model.Metric(lset), + Value: model.SampleValue(q.GetValue()), + Timestamp: timestamp, + }) + } + + lset := make(model.LabelSet, len(m.Label)+1) + for _, p := range m.Label { + lset[model.LabelName(p.GetName())] = model.LabelValue(p.GetValue()) + } + lset[model.MetricNameLabel] = model.LabelValue(f.GetName() + "_sum") + + samples = append(samples, &model.Sample{ + Metric: model.Metric(lset), + Value: model.SampleValue(m.Summary.GetSampleSum()), + Timestamp: timestamp, + }) + + lset = make(model.LabelSet, len(m.Label)+1) + for _, p := range m.Label { + lset[model.LabelName(p.GetName())] = model.LabelValue(p.GetValue()) + } + lset[model.MetricNameLabel] = model.LabelValue(f.GetName() + "_count") + + samples = append(samples, &model.Sample{ + Metric: model.Metric(lset), + Value: model.SampleValue(m.Summary.GetSampleCount()), + Timestamp: timestamp, + }) + } + + return samples +} + +func extractHistogram(o *DecodeOptions, f *dto.MetricFamily) model.Vector { + samples := make(model.Vector, 0, len(f.Metric)) + + for _, m := range f.Metric { + if m.Histogram == nil { + continue + } + + timestamp := o.Timestamp + if m.TimestampMs != nil { + timestamp = model.TimeFromUnixNano(*m.TimestampMs * 1000000) + } + + infSeen := false + + for _, q := range m.Histogram.Bucket { + lset := make(model.LabelSet, len(m.Label)+2) + for _, p := range m.Label { + lset[model.LabelName(p.GetName())] = model.LabelValue(p.GetValue()) + } + lset[model.LabelName(model.BucketLabel)] = model.LabelValue(fmt.Sprint(q.GetUpperBound())) + lset[model.MetricNameLabel] = model.LabelValue(f.GetName() + "_bucket") + + if math.IsInf(q.GetUpperBound(), +1) { + infSeen = true + } + + samples = append(samples, &model.Sample{ + Metric: model.Metric(lset), + Value: model.SampleValue(q.GetCumulativeCount()), + Timestamp: timestamp, + }) + } + + lset := make(model.LabelSet, len(m.Label)+1) + for _, p := range m.Label { + lset[model.LabelName(p.GetName())] = model.LabelValue(p.GetValue()) + } + lset[model.MetricNameLabel] = model.LabelValue(f.GetName() + "_sum") + + samples = append(samples, &model.Sample{ + Metric: model.Metric(lset), + Value: model.SampleValue(m.Histogram.GetSampleSum()), + Timestamp: timestamp, + }) + + lset = make(model.LabelSet, len(m.Label)+1) + for _, p := range m.Label { + lset[model.LabelName(p.GetName())] = model.LabelValue(p.GetValue()) + } + lset[model.MetricNameLabel] = model.LabelValue(f.GetName() + "_count") + + count := &model.Sample{ + Metric: model.Metric(lset), + Value: model.SampleValue(m.Histogram.GetSampleCount()), + Timestamp: timestamp, + } + samples = append(samples, count) + + if !infSeen { + // Append an infinity bucket sample. + lset := make(model.LabelSet, len(m.Label)+2) + for _, p := range m.Label { + lset[model.LabelName(p.GetName())] = model.LabelValue(p.GetValue()) + } + lset[model.LabelName(model.BucketLabel)] = model.LabelValue("+Inf") + lset[model.MetricNameLabel] = model.LabelValue(f.GetName() + "_bucket") + + samples = append(samples, &model.Sample{ + Metric: model.Metric(lset), + Value: count.Value, + Timestamp: timestamp, + }) + } + } + + return samples +} diff --git a/vendor/github.com/prometheus/common/expfmt/encode.go b/vendor/github.com/prometheus/common/expfmt/encode.go new file mode 100644 index 00000000..bd4e3474 --- /dev/null +++ b/vendor/github.com/prometheus/common/expfmt/encode.go @@ -0,0 +1,162 @@ +// Copyright 2015 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package expfmt + +import ( + "fmt" + "io" + "net/http" + + "github.com/golang/protobuf/proto" + "github.com/matttproud/golang_protobuf_extensions/pbutil" + "github.com/prometheus/common/internal/bitbucket.org/ww/goautoneg" + + dto "github.com/prometheus/client_model/go" +) + +// Encoder types encode metric families into an underlying wire protocol. +type Encoder interface { + Encode(*dto.MetricFamily) error +} + +// Closer is implemented by Encoders that need to be closed to finalize +// encoding. (For example, OpenMetrics needs a final `# EOF` line.) +// +// Note that all Encoder implementations returned from this package implement +// Closer, too, even if the Close call is a no-op. This happens in preparation +// for adding a Close method to the Encoder interface directly in a (mildly +// breaking) release in the future. +type Closer interface { + Close() error +} + +type encoderCloser struct { + encode func(*dto.MetricFamily) error + close func() error +} + +func (ec encoderCloser) Encode(v *dto.MetricFamily) error { + return ec.encode(v) +} + +func (ec encoderCloser) Close() error { + return ec.close() +} + +// Negotiate returns the Content-Type based on the given Accept header. If no +// appropriate accepted type is found, FmtText is returned (which is the +// Prometheus text format). This function will never negotiate FmtOpenMetrics, +// as the support is still experimental. To include the option to negotiate +// FmtOpenMetrics, use NegotiateOpenMetrics. +func Negotiate(h http.Header) Format { + for _, ac := range goautoneg.ParseAccept(h.Get(hdrAccept)) { + ver := ac.Params["version"] + if ac.Type+"/"+ac.SubType == ProtoType && ac.Params["proto"] == ProtoProtocol { + switch ac.Params["encoding"] { + case "delimited": + return FmtProtoDelim + case "text": + return FmtProtoText + case "compact-text": + return FmtProtoCompact + } + } + if ac.Type == "text" && ac.SubType == "plain" && (ver == TextVersion || ver == "") { + return FmtText + } + } + return FmtText +} + +// NegotiateIncludingOpenMetrics works like Negotiate but includes +// FmtOpenMetrics as an option for the result. Note that this function is +// temporary and will disappear once FmtOpenMetrics is fully supported and as +// such may be negotiated by the normal Negotiate function. +func NegotiateIncludingOpenMetrics(h http.Header) Format { + for _, ac := range goautoneg.ParseAccept(h.Get(hdrAccept)) { + ver := ac.Params["version"] + if ac.Type+"/"+ac.SubType == ProtoType && ac.Params["proto"] == ProtoProtocol { + switch ac.Params["encoding"] { + case "delimited": + return FmtProtoDelim + case "text": + return FmtProtoText + case "compact-text": + return FmtProtoCompact + } + } + if ac.Type == "text" && ac.SubType == "plain" && (ver == TextVersion || ver == "") { + return FmtText + } + if ac.Type+"/"+ac.SubType == OpenMetricsType && (ver == OpenMetricsVersion || ver == "") { + return FmtOpenMetrics + } + } + return FmtText +} + +// NewEncoder returns a new encoder based on content type negotiation. All +// Encoder implementations returned by NewEncoder also implement Closer, and +// callers should always call the Close method. It is currently only required +// for FmtOpenMetrics, but a future (breaking) release will add the Close method +// to the Encoder interface directly. The current version of the Encoder +// interface is kept for backwards compatibility. +func NewEncoder(w io.Writer, format Format) Encoder { + switch format { + case FmtProtoDelim: + return encoderCloser{ + encode: func(v *dto.MetricFamily) error { + _, err := pbutil.WriteDelimited(w, v) + return err + }, + close: func() error { return nil }, + } + case FmtProtoCompact: + return encoderCloser{ + encode: func(v *dto.MetricFamily) error { + _, err := fmt.Fprintln(w, v.String()) + return err + }, + close: func() error { return nil }, + } + case FmtProtoText: + return encoderCloser{ + encode: func(v *dto.MetricFamily) error { + _, err := fmt.Fprintln(w, proto.MarshalTextString(v)) + return err + }, + close: func() error { return nil }, + } + case FmtText: + return encoderCloser{ + encode: func(v *dto.MetricFamily) error { + _, err := MetricFamilyToText(w, v) + return err + }, + close: func() error { return nil }, + } + case FmtOpenMetrics: + return encoderCloser{ + encode: func(v *dto.MetricFamily) error { + _, err := MetricFamilyToOpenMetrics(w, v) + return err + }, + close: func() error { + _, err := FinalizeOpenMetrics(w) + return err + }, + } + } + panic(fmt.Errorf("expfmt.NewEncoder: unknown format %q", format)) +} diff --git a/vendor/github.com/prometheus/common/expfmt/expfmt.go b/vendor/github.com/prometheus/common/expfmt/expfmt.go new file mode 100644 index 00000000..0f176fa6 --- /dev/null +++ b/vendor/github.com/prometheus/common/expfmt/expfmt.go @@ -0,0 +1,41 @@ +// Copyright 2015 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +// Package expfmt contains tools for reading and writing Prometheus metrics. +package expfmt + +// Format specifies the HTTP content type of the different wire protocols. +type Format string + +// Constants to assemble the Content-Type values for the different wire protocols. +const ( + TextVersion = "0.0.4" + ProtoType = `application/vnd.google.protobuf` + ProtoProtocol = `io.prometheus.client.MetricFamily` + ProtoFmt = ProtoType + "; proto=" + ProtoProtocol + ";" + OpenMetricsType = `application/openmetrics-text` + OpenMetricsVersion = "0.0.1" + + // The Content-Type values for the different wire protocols. + FmtUnknown Format = `` + FmtText Format = `text/plain; version=` + TextVersion + `; charset=utf-8` + FmtProtoDelim Format = ProtoFmt + ` encoding=delimited` + FmtProtoText Format = ProtoFmt + ` encoding=text` + FmtProtoCompact Format = ProtoFmt + ` encoding=compact-text` + FmtOpenMetrics Format = OpenMetricsType + `; version=` + OpenMetricsVersion + `; charset=utf-8` +) + +const ( + hdrContentType = "Content-Type" + hdrAccept = "Accept" +) diff --git a/vendor/github.com/prometheus/common/expfmt/fuzz.go b/vendor/github.com/prometheus/common/expfmt/fuzz.go new file mode 100644 index 00000000..dc2eedee --- /dev/null +++ b/vendor/github.com/prometheus/common/expfmt/fuzz.go @@ -0,0 +1,36 @@ +// Copyright 2014 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +// Build only when actually fuzzing +// +build gofuzz + +package expfmt + +import "bytes" + +// Fuzz text metric parser with with github.com/dvyukov/go-fuzz: +// +// go-fuzz-build github.com/prometheus/common/expfmt +// go-fuzz -bin expfmt-fuzz.zip -workdir fuzz +// +// Further input samples should go in the folder fuzz/corpus. +func Fuzz(in []byte) int { + parser := TextParser{} + _, err := parser.TextToMetricFamilies(bytes.NewReader(in)) + + if err != nil { + return 0 + } + + return 1 +} diff --git a/vendor/github.com/prometheus/common/expfmt/openmetrics_create.go b/vendor/github.com/prometheus/common/expfmt/openmetrics_create.go new file mode 100644 index 00000000..8a9313a3 --- /dev/null +++ b/vendor/github.com/prometheus/common/expfmt/openmetrics_create.go @@ -0,0 +1,527 @@ +// Copyright 2020 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package expfmt + +import ( + "bufio" + "bytes" + "fmt" + "io" + "math" + "strconv" + "strings" + + "github.com/golang/protobuf/ptypes" + "github.com/prometheus/common/model" + + dto "github.com/prometheus/client_model/go" +) + +// MetricFamilyToOpenMetrics converts a MetricFamily proto message into the +// OpenMetrics text format and writes the resulting lines to 'out'. It returns +// the number of bytes written and any error encountered. The output will have +// the same order as the input, no further sorting is performed. Furthermore, +// this function assumes the input is already sanitized and does not perform any +// sanity checks. If the input contains duplicate metrics or invalid metric or +// label names, the conversion will result in invalid text format output. +// +// This function fulfills the type 'expfmt.encoder'. +// +// Note that OpenMetrics requires a final `# EOF` line. Since this function acts +// on individual metric families, it is the responsibility of the caller to +// append this line to 'out' once all metric families have been written. +// Conveniently, this can be done by calling FinalizeOpenMetrics. +// +// The output should be fully OpenMetrics compliant. However, there are a few +// missing features and peculiarities to avoid complications when switching from +// Prometheus to OpenMetrics or vice versa: +// +// - Counters are expected to have the `_total` suffix in their metric name. In +// the output, the suffix will be truncated from the `# TYPE` and `# HELP` +// line. A counter with a missing `_total` suffix is not an error. However, +// its type will be set to `unknown` in that case to avoid invalid OpenMetrics +// output. +// +// - No support for the following (optional) features: `# UNIT` line, `_created` +// line, info type, stateset type, gaugehistogram type. +// +// - The size of exemplar labels is not checked (i.e. it's possible to create +// exemplars that are larger than allowed by the OpenMetrics specification). +// +// - The value of Counters is not checked. (OpenMetrics doesn't allow counters +// with a `NaN` value.) +func MetricFamilyToOpenMetrics(out io.Writer, in *dto.MetricFamily) (written int, err error) { + name := in.GetName() + if name == "" { + return 0, fmt.Errorf("MetricFamily has no name: %s", in) + } + + // Try the interface upgrade. If it doesn't work, we'll use a + // bufio.Writer from the sync.Pool. + w, ok := out.(enhancedWriter) + if !ok { + b := bufPool.Get().(*bufio.Writer) + b.Reset(out) + w = b + defer func() { + bErr := b.Flush() + if err == nil { + err = bErr + } + bufPool.Put(b) + }() + } + + var ( + n int + metricType = in.GetType() + shortName = name + ) + if metricType == dto.MetricType_COUNTER && strings.HasSuffix(shortName, "_total") { + shortName = name[:len(name)-6] + } + + // Comments, first HELP, then TYPE. + if in.Help != nil { + n, err = w.WriteString("# HELP ") + written += n + if err != nil { + return + } + n, err = w.WriteString(shortName) + written += n + if err != nil { + return + } + err = w.WriteByte(' ') + written++ + if err != nil { + return + } + n, err = writeEscapedString(w, *in.Help, true) + written += n + if err != nil { + return + } + err = w.WriteByte('\n') + written++ + if err != nil { + return + } + } + n, err = w.WriteString("# TYPE ") + written += n + if err != nil { + return + } + n, err = w.WriteString(shortName) + written += n + if err != nil { + return + } + switch metricType { + case dto.MetricType_COUNTER: + if strings.HasSuffix(name, "_total") { + n, err = w.WriteString(" counter\n") + } else { + n, err = w.WriteString(" unknown\n") + } + case dto.MetricType_GAUGE: + n, err = w.WriteString(" gauge\n") + case dto.MetricType_SUMMARY: + n, err = w.WriteString(" summary\n") + case dto.MetricType_UNTYPED: + n, err = w.WriteString(" unknown\n") + case dto.MetricType_HISTOGRAM: + n, err = w.WriteString(" histogram\n") + default: + return written, fmt.Errorf("unknown metric type %s", metricType.String()) + } + written += n + if err != nil { + return + } + + // Finally the samples, one line for each. + for _, metric := range in.Metric { + switch metricType { + case dto.MetricType_COUNTER: + if metric.Counter == nil { + return written, fmt.Errorf( + "expected counter in metric %s %s", name, metric, + ) + } + // Note that we have ensured above that either the name + // ends on `_total` or that the rendered type is + // `unknown`. Therefore, no `_total` must be added here. + n, err = writeOpenMetricsSample( + w, name, "", metric, "", 0, + metric.Counter.GetValue(), 0, false, + metric.Counter.Exemplar, + ) + case dto.MetricType_GAUGE: + if metric.Gauge == nil { + return written, fmt.Errorf( + "expected gauge in metric %s %s", name, metric, + ) + } + n, err = writeOpenMetricsSample( + w, name, "", metric, "", 0, + metric.Gauge.GetValue(), 0, false, + nil, + ) + case dto.MetricType_UNTYPED: + if metric.Untyped == nil { + return written, fmt.Errorf( + "expected untyped in metric %s %s", name, metric, + ) + } + n, err = writeOpenMetricsSample( + w, name, "", metric, "", 0, + metric.Untyped.GetValue(), 0, false, + nil, + ) + case dto.MetricType_SUMMARY: + if metric.Summary == nil { + return written, fmt.Errorf( + "expected summary in metric %s %s", name, metric, + ) + } + for _, q := range metric.Summary.Quantile { + n, err = writeOpenMetricsSample( + w, name, "", metric, + model.QuantileLabel, q.GetQuantile(), + q.GetValue(), 0, false, + nil, + ) + written += n + if err != nil { + return + } + } + n, err = writeOpenMetricsSample( + w, name, "_sum", metric, "", 0, + metric.Summary.GetSampleSum(), 0, false, + nil, + ) + written += n + if err != nil { + return + } + n, err = writeOpenMetricsSample( + w, name, "_count", metric, "", 0, + 0, metric.Summary.GetSampleCount(), true, + nil, + ) + case dto.MetricType_HISTOGRAM: + if metric.Histogram == nil { + return written, fmt.Errorf( + "expected histogram in metric %s %s", name, metric, + ) + } + infSeen := false + for _, b := range metric.Histogram.Bucket { + n, err = writeOpenMetricsSample( + w, name, "_bucket", metric, + model.BucketLabel, b.GetUpperBound(), + 0, b.GetCumulativeCount(), true, + b.Exemplar, + ) + written += n + if err != nil { + return + } + if math.IsInf(b.GetUpperBound(), +1) { + infSeen = true + } + } + if !infSeen { + n, err = writeOpenMetricsSample( + w, name, "_bucket", metric, + model.BucketLabel, math.Inf(+1), + 0, metric.Histogram.GetSampleCount(), true, + nil, + ) + written += n + if err != nil { + return + } + } + n, err = writeOpenMetricsSample( + w, name, "_sum", metric, "", 0, + metric.Histogram.GetSampleSum(), 0, false, + nil, + ) + written += n + if err != nil { + return + } + n, err = writeOpenMetricsSample( + w, name, "_count", metric, "", 0, + 0, metric.Histogram.GetSampleCount(), true, + nil, + ) + default: + return written, fmt.Errorf( + "unexpected type in metric %s %s", name, metric, + ) + } + written += n + if err != nil { + return + } + } + return +} + +// FinalizeOpenMetrics writes the final `# EOF\n` line required by OpenMetrics. +func FinalizeOpenMetrics(w io.Writer) (written int, err error) { + return w.Write([]byte("# EOF\n")) +} + +// writeOpenMetricsSample writes a single sample in OpenMetrics text format to +// w, given the metric name, the metric proto message itself, optionally an +// additional label name with a float64 value (use empty string as label name if +// not required), the value (optionally as float64 or uint64, determined by +// useIntValue), and optionally an exemplar (use nil if not required). The +// function returns the number of bytes written and any error encountered. +func writeOpenMetricsSample( + w enhancedWriter, + name, suffix string, + metric *dto.Metric, + additionalLabelName string, additionalLabelValue float64, + floatValue float64, intValue uint64, useIntValue bool, + exemplar *dto.Exemplar, +) (int, error) { + var written int + n, err := w.WriteString(name) + written += n + if err != nil { + return written, err + } + if suffix != "" { + n, err = w.WriteString(suffix) + written += n + if err != nil { + return written, err + } + } + n, err = writeOpenMetricsLabelPairs( + w, metric.Label, additionalLabelName, additionalLabelValue, + ) + written += n + if err != nil { + return written, err + } + err = w.WriteByte(' ') + written++ + if err != nil { + return written, err + } + if useIntValue { + n, err = writeUint(w, intValue) + } else { + n, err = writeOpenMetricsFloat(w, floatValue) + } + written += n + if err != nil { + return written, err + } + if metric.TimestampMs != nil { + err = w.WriteByte(' ') + written++ + if err != nil { + return written, err + } + // TODO(beorn7): Format this directly without converting to a float first. + n, err = writeOpenMetricsFloat(w, float64(*metric.TimestampMs)/1000) + written += n + if err != nil { + return written, err + } + } + if exemplar != nil { + n, err = writeExemplar(w, exemplar) + written += n + if err != nil { + return written, err + } + } + err = w.WriteByte('\n') + written++ + if err != nil { + return written, err + } + return written, nil +} + +// writeOpenMetricsLabelPairs works like writeOpenMetrics but formats the float +// in OpenMetrics style. +func writeOpenMetricsLabelPairs( + w enhancedWriter, + in []*dto.LabelPair, + additionalLabelName string, additionalLabelValue float64, +) (int, error) { + if len(in) == 0 && additionalLabelName == "" { + return 0, nil + } + var ( + written int + separator byte = '{' + ) + for _, lp := range in { + err := w.WriteByte(separator) + written++ + if err != nil { + return written, err + } + n, err := w.WriteString(lp.GetName()) + written += n + if err != nil { + return written, err + } + n, err = w.WriteString(`="`) + written += n + if err != nil { + return written, err + } + n, err = writeEscapedString(w, lp.GetValue(), true) + written += n + if err != nil { + return written, err + } + err = w.WriteByte('"') + written++ + if err != nil { + return written, err + } + separator = ',' + } + if additionalLabelName != "" { + err := w.WriteByte(separator) + written++ + if err != nil { + return written, err + } + n, err := w.WriteString(additionalLabelName) + written += n + if err != nil { + return written, err + } + n, err = w.WriteString(`="`) + written += n + if err != nil { + return written, err + } + n, err = writeOpenMetricsFloat(w, additionalLabelValue) + written += n + if err != nil { + return written, err + } + err = w.WriteByte('"') + written++ + if err != nil { + return written, err + } + } + err := w.WriteByte('}') + written++ + if err != nil { + return written, err + } + return written, nil +} + +// writeExemplar writes the provided exemplar in OpenMetrics format to w. The +// function returns the number of bytes written and any error encountered. +func writeExemplar(w enhancedWriter, e *dto.Exemplar) (int, error) { + written := 0 + n, err := w.WriteString(" # ") + written += n + if err != nil { + return written, err + } + n, err = writeOpenMetricsLabelPairs(w, e.Label, "", 0) + written += n + if err != nil { + return written, err + } + err = w.WriteByte(' ') + written++ + if err != nil { + return written, err + } + n, err = writeOpenMetricsFloat(w, e.GetValue()) + written += n + if err != nil { + return written, err + } + if e.Timestamp != nil { + err = w.WriteByte(' ') + written++ + if err != nil { + return written, err + } + ts, err := ptypes.Timestamp((*e).Timestamp) + if err != nil { + return written, err + } + // TODO(beorn7): Format this directly from components of ts to + // avoid overflow/underflow and precision issues of the float + // conversion. + n, err = writeOpenMetricsFloat(w, float64(ts.UnixNano())/1e9) + written += n + if err != nil { + return written, err + } + } + return written, nil +} + +// writeOpenMetricsFloat works like writeFloat but appends ".0" if the resulting +// number would otherwise contain neither a "." nor an "e". +func writeOpenMetricsFloat(w enhancedWriter, f float64) (int, error) { + switch { + case f == 1: + return w.WriteString("1.0") + case f == 0: + return w.WriteString("0.0") + case f == -1: + return w.WriteString("-1.0") + case math.IsNaN(f): + return w.WriteString("NaN") + case math.IsInf(f, +1): + return w.WriteString("+Inf") + case math.IsInf(f, -1): + return w.WriteString("-Inf") + default: + bp := numBufPool.Get().(*[]byte) + *bp = strconv.AppendFloat((*bp)[:0], f, 'g', -1, 64) + if !bytes.ContainsAny(*bp, "e.") { + *bp = append(*bp, '.', '0') + } + written, err := w.Write(*bp) + numBufPool.Put(bp) + return written, err + } +} + +// writeUint is like writeInt just for uint64. +func writeUint(w enhancedWriter, u uint64) (int, error) { + bp := numBufPool.Get().(*[]byte) + *bp = strconv.AppendUint((*bp)[:0], u, 10) + written, err := w.Write(*bp) + numBufPool.Put(bp) + return written, err +} diff --git a/vendor/github.com/prometheus/common/expfmt/text_create.go b/vendor/github.com/prometheus/common/expfmt/text_create.go new file mode 100644 index 00000000..5ba503b0 --- /dev/null +++ b/vendor/github.com/prometheus/common/expfmt/text_create.go @@ -0,0 +1,465 @@ +// Copyright 2014 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package expfmt + +import ( + "bufio" + "fmt" + "io" + "io/ioutil" + "math" + "strconv" + "strings" + "sync" + + "github.com/prometheus/common/model" + + dto "github.com/prometheus/client_model/go" +) + +// enhancedWriter has all the enhanced write functions needed here. bufio.Writer +// implements it. +type enhancedWriter interface { + io.Writer + WriteRune(r rune) (n int, err error) + WriteString(s string) (n int, err error) + WriteByte(c byte) error +} + +const ( + initialNumBufSize = 24 +) + +var ( + bufPool = sync.Pool{ + New: func() interface{} { + return bufio.NewWriter(ioutil.Discard) + }, + } + numBufPool = sync.Pool{ + New: func() interface{} { + b := make([]byte, 0, initialNumBufSize) + return &b + }, + } +) + +// MetricFamilyToText converts a MetricFamily proto message into text format and +// writes the resulting lines to 'out'. It returns the number of bytes written +// and any error encountered. The output will have the same order as the input, +// no further sorting is performed. Furthermore, this function assumes the input +// is already sanitized and does not perform any sanity checks. If the input +// contains duplicate metrics or invalid metric or label names, the conversion +// will result in invalid text format output. +// +// This method fulfills the type 'prometheus.encoder'. +func MetricFamilyToText(out io.Writer, in *dto.MetricFamily) (written int, err error) { + // Fail-fast checks. + if len(in.Metric) == 0 { + return 0, fmt.Errorf("MetricFamily has no metrics: %s", in) + } + name := in.GetName() + if name == "" { + return 0, fmt.Errorf("MetricFamily has no name: %s", in) + } + + // Try the interface upgrade. If it doesn't work, we'll use a + // bufio.Writer from the sync.Pool. + w, ok := out.(enhancedWriter) + if !ok { + b := bufPool.Get().(*bufio.Writer) + b.Reset(out) + w = b + defer func() { + bErr := b.Flush() + if err == nil { + err = bErr + } + bufPool.Put(b) + }() + } + + var n int + + // Comments, first HELP, then TYPE. + if in.Help != nil { + n, err = w.WriteString("# HELP ") + written += n + if err != nil { + return + } + n, err = w.WriteString(name) + written += n + if err != nil { + return + } + err = w.WriteByte(' ') + written++ + if err != nil { + return + } + n, err = writeEscapedString(w, *in.Help, false) + written += n + if err != nil { + return + } + err = w.WriteByte('\n') + written++ + if err != nil { + return + } + } + n, err = w.WriteString("# TYPE ") + written += n + if err != nil { + return + } + n, err = w.WriteString(name) + written += n + if err != nil { + return + } + metricType := in.GetType() + switch metricType { + case dto.MetricType_COUNTER: + n, err = w.WriteString(" counter\n") + case dto.MetricType_GAUGE: + n, err = w.WriteString(" gauge\n") + case dto.MetricType_SUMMARY: + n, err = w.WriteString(" summary\n") + case dto.MetricType_UNTYPED: + n, err = w.WriteString(" untyped\n") + case dto.MetricType_HISTOGRAM: + n, err = w.WriteString(" histogram\n") + default: + return written, fmt.Errorf("unknown metric type %s", metricType.String()) + } + written += n + if err != nil { + return + } + + // Finally the samples, one line for each. + for _, metric := range in.Metric { + switch metricType { + case dto.MetricType_COUNTER: + if metric.Counter == nil { + return written, fmt.Errorf( + "expected counter in metric %s %s", name, metric, + ) + } + n, err = writeSample( + w, name, "", metric, "", 0, + metric.Counter.GetValue(), + ) + case dto.MetricType_GAUGE: + if metric.Gauge == nil { + return written, fmt.Errorf( + "expected gauge in metric %s %s", name, metric, + ) + } + n, err = writeSample( + w, name, "", metric, "", 0, + metric.Gauge.GetValue(), + ) + case dto.MetricType_UNTYPED: + if metric.Untyped == nil { + return written, fmt.Errorf( + "expected untyped in metric %s %s", name, metric, + ) + } + n, err = writeSample( + w, name, "", metric, "", 0, + metric.Untyped.GetValue(), + ) + case dto.MetricType_SUMMARY: + if metric.Summary == nil { + return written, fmt.Errorf( + "expected summary in metric %s %s", name, metric, + ) + } + for _, q := range metric.Summary.Quantile { + n, err = writeSample( + w, name, "", metric, + model.QuantileLabel, q.GetQuantile(), + q.GetValue(), + ) + written += n + if err != nil { + return + } + } + n, err = writeSample( + w, name, "_sum", metric, "", 0, + metric.Summary.GetSampleSum(), + ) + written += n + if err != nil { + return + } + n, err = writeSample( + w, name, "_count", metric, "", 0, + float64(metric.Summary.GetSampleCount()), + ) + case dto.MetricType_HISTOGRAM: + if metric.Histogram == nil { + return written, fmt.Errorf( + "expected histogram in metric %s %s", name, metric, + ) + } + infSeen := false + for _, b := range metric.Histogram.Bucket { + n, err = writeSample( + w, name, "_bucket", metric, + model.BucketLabel, b.GetUpperBound(), + float64(b.GetCumulativeCount()), + ) + written += n + if err != nil { + return + } + if math.IsInf(b.GetUpperBound(), +1) { + infSeen = true + } + } + if !infSeen { + n, err = writeSample( + w, name, "_bucket", metric, + model.BucketLabel, math.Inf(+1), + float64(metric.Histogram.GetSampleCount()), + ) + written += n + if err != nil { + return + } + } + n, err = writeSample( + w, name, "_sum", metric, "", 0, + metric.Histogram.GetSampleSum(), + ) + written += n + if err != nil { + return + } + n, err = writeSample( + w, name, "_count", metric, "", 0, + float64(metric.Histogram.GetSampleCount()), + ) + default: + return written, fmt.Errorf( + "unexpected type in metric %s %s", name, metric, + ) + } + written += n + if err != nil { + return + } + } + return +} + +// writeSample writes a single sample in text format to w, given the metric +// name, the metric proto message itself, optionally an additional label name +// with a float64 value (use empty string as label name if not required), and +// the value. The function returns the number of bytes written and any error +// encountered. +func writeSample( + w enhancedWriter, + name, suffix string, + metric *dto.Metric, + additionalLabelName string, additionalLabelValue float64, + value float64, +) (int, error) { + var written int + n, err := w.WriteString(name) + written += n + if err != nil { + return written, err + } + if suffix != "" { + n, err = w.WriteString(suffix) + written += n + if err != nil { + return written, err + } + } + n, err = writeLabelPairs( + w, metric.Label, additionalLabelName, additionalLabelValue, + ) + written += n + if err != nil { + return written, err + } + err = w.WriteByte(' ') + written++ + if err != nil { + return written, err + } + n, err = writeFloat(w, value) + written += n + if err != nil { + return written, err + } + if metric.TimestampMs != nil { + err = w.WriteByte(' ') + written++ + if err != nil { + return written, err + } + n, err = writeInt(w, *metric.TimestampMs) + written += n + if err != nil { + return written, err + } + } + err = w.WriteByte('\n') + written++ + if err != nil { + return written, err + } + return written, nil +} + +// writeLabelPairs converts a slice of LabelPair proto messages plus the +// explicitly given additional label pair into text formatted as required by the +// text format and writes it to 'w'. An empty slice in combination with an empty +// string 'additionalLabelName' results in nothing being written. Otherwise, the +// label pairs are written, escaped as required by the text format, and enclosed +// in '{...}'. The function returns the number of bytes written and any error +// encountered. +func writeLabelPairs( + w enhancedWriter, + in []*dto.LabelPair, + additionalLabelName string, additionalLabelValue float64, +) (int, error) { + if len(in) == 0 && additionalLabelName == "" { + return 0, nil + } + var ( + written int + separator byte = '{' + ) + for _, lp := range in { + err := w.WriteByte(separator) + written++ + if err != nil { + return written, err + } + n, err := w.WriteString(lp.GetName()) + written += n + if err != nil { + return written, err + } + n, err = w.WriteString(`="`) + written += n + if err != nil { + return written, err + } + n, err = writeEscapedString(w, lp.GetValue(), true) + written += n + if err != nil { + return written, err + } + err = w.WriteByte('"') + written++ + if err != nil { + return written, err + } + separator = ',' + } + if additionalLabelName != "" { + err := w.WriteByte(separator) + written++ + if err != nil { + return written, err + } + n, err := w.WriteString(additionalLabelName) + written += n + if err != nil { + return written, err + } + n, err = w.WriteString(`="`) + written += n + if err != nil { + return written, err + } + n, err = writeFloat(w, additionalLabelValue) + written += n + if err != nil { + return written, err + } + err = w.WriteByte('"') + written++ + if err != nil { + return written, err + } + } + err := w.WriteByte('}') + written++ + if err != nil { + return written, err + } + return written, nil +} + +// writeEscapedString replaces '\' by '\\', new line character by '\n', and - if +// includeDoubleQuote is true - '"' by '\"'. +var ( + escaper = strings.NewReplacer("\\", `\\`, "\n", `\n`) + quotedEscaper = strings.NewReplacer("\\", `\\`, "\n", `\n`, "\"", `\"`) +) + +func writeEscapedString(w enhancedWriter, v string, includeDoubleQuote bool) (int, error) { + if includeDoubleQuote { + return quotedEscaper.WriteString(w, v) + } + return escaper.WriteString(w, v) +} + +// writeFloat is equivalent to fmt.Fprint with a float64 argument but hardcodes +// a few common cases for increased efficiency. For non-hardcoded cases, it uses +// strconv.AppendFloat to avoid allocations, similar to writeInt. +func writeFloat(w enhancedWriter, f float64) (int, error) { + switch { + case f == 1: + return 1, w.WriteByte('1') + case f == 0: + return 1, w.WriteByte('0') + case f == -1: + return w.WriteString("-1") + case math.IsNaN(f): + return w.WriteString("NaN") + case math.IsInf(f, +1): + return w.WriteString("+Inf") + case math.IsInf(f, -1): + return w.WriteString("-Inf") + default: + bp := numBufPool.Get().(*[]byte) + *bp = strconv.AppendFloat((*bp)[:0], f, 'g', -1, 64) + written, err := w.Write(*bp) + numBufPool.Put(bp) + return written, err + } +} + +// writeInt is equivalent to fmt.Fprint with an int64 argument but uses +// strconv.AppendInt with a byte slice taken from a sync.Pool to avoid +// allocations. +func writeInt(w enhancedWriter, i int64) (int, error) { + bp := numBufPool.Get().(*[]byte) + *bp = strconv.AppendInt((*bp)[:0], i, 10) + written, err := w.Write(*bp) + numBufPool.Put(bp) + return written, err +} diff --git a/vendor/github.com/prometheus/common/expfmt/text_parse.go b/vendor/github.com/prometheus/common/expfmt/text_parse.go new file mode 100644 index 00000000..342e5940 --- /dev/null +++ b/vendor/github.com/prometheus/common/expfmt/text_parse.go @@ -0,0 +1,764 @@ +// Copyright 2014 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package expfmt + +import ( + "bufio" + "bytes" + "fmt" + "io" + "math" + "strconv" + "strings" + + dto "github.com/prometheus/client_model/go" + + "github.com/golang/protobuf/proto" + "github.com/prometheus/common/model" +) + +// A stateFn is a function that represents a state in a state machine. By +// executing it, the state is progressed to the next state. The stateFn returns +// another stateFn, which represents the new state. The end state is represented +// by nil. +type stateFn func() stateFn + +// ParseError signals errors while parsing the simple and flat text-based +// exchange format. +type ParseError struct { + Line int + Msg string +} + +// Error implements the error interface. +func (e ParseError) Error() string { + return fmt.Sprintf("text format parsing error in line %d: %s", e.Line, e.Msg) +} + +// TextParser is used to parse the simple and flat text-based exchange format. Its +// zero value is ready to use. +type TextParser struct { + metricFamiliesByName map[string]*dto.MetricFamily + buf *bufio.Reader // Where the parsed input is read through. + err error // Most recent error. + lineCount int // Tracks the line count for error messages. + currentByte byte // The most recent byte read. + currentToken bytes.Buffer // Re-used each time a token has to be gathered from multiple bytes. + currentMF *dto.MetricFamily + currentMetric *dto.Metric + currentLabelPair *dto.LabelPair + + // The remaining member variables are only used for summaries/histograms. + currentLabels map[string]string // All labels including '__name__' but excluding 'quantile'/'le' + // Summary specific. + summaries map[uint64]*dto.Metric // Key is created with LabelsToSignature. + currentQuantile float64 + // Histogram specific. + histograms map[uint64]*dto.Metric // Key is created with LabelsToSignature. + currentBucket float64 + // These tell us if the currently processed line ends on '_count' or + // '_sum' respectively and belong to a summary/histogram, representing the sample + // count and sum of that summary/histogram. + currentIsSummaryCount, currentIsSummarySum bool + currentIsHistogramCount, currentIsHistogramSum bool +} + +// TextToMetricFamilies reads 'in' as the simple and flat text-based exchange +// format and creates MetricFamily proto messages. It returns the MetricFamily +// proto messages in a map where the metric names are the keys, along with any +// error encountered. +// +// If the input contains duplicate metrics (i.e. lines with the same metric name +// and exactly the same label set), the resulting MetricFamily will contain +// duplicate Metric proto messages. Similar is true for duplicate label +// names. Checks for duplicates have to be performed separately, if required. +// Also note that neither the metrics within each MetricFamily are sorted nor +// the label pairs within each Metric. Sorting is not required for the most +// frequent use of this method, which is sample ingestion in the Prometheus +// server. However, for presentation purposes, you might want to sort the +// metrics, and in some cases, you must sort the labels, e.g. for consumption by +// the metric family injection hook of the Prometheus registry. +// +// Summaries and histograms are rather special beasts. You would probably not +// use them in the simple text format anyway. This method can deal with +// summaries and histograms if they are presented in exactly the way the +// text.Create function creates them. +// +// This method must not be called concurrently. If you want to parse different +// input concurrently, instantiate a separate Parser for each goroutine. +func (p *TextParser) TextToMetricFamilies(in io.Reader) (map[string]*dto.MetricFamily, error) { + p.reset(in) + for nextState := p.startOfLine; nextState != nil; nextState = nextState() { + // Magic happens here... + } + // Get rid of empty metric families. + for k, mf := range p.metricFamiliesByName { + if len(mf.GetMetric()) == 0 { + delete(p.metricFamiliesByName, k) + } + } + // If p.err is io.EOF now, we have run into a premature end of the input + // stream. Turn this error into something nicer and more + // meaningful. (io.EOF is often used as a signal for the legitimate end + // of an input stream.) + if p.err == io.EOF { + p.parseError("unexpected end of input stream") + } + return p.metricFamiliesByName, p.err +} + +func (p *TextParser) reset(in io.Reader) { + p.metricFamiliesByName = map[string]*dto.MetricFamily{} + if p.buf == nil { + p.buf = bufio.NewReader(in) + } else { + p.buf.Reset(in) + } + p.err = nil + p.lineCount = 0 + if p.summaries == nil || len(p.summaries) > 0 { + p.summaries = map[uint64]*dto.Metric{} + } + if p.histograms == nil || len(p.histograms) > 0 { + p.histograms = map[uint64]*dto.Metric{} + } + p.currentQuantile = math.NaN() + p.currentBucket = math.NaN() +} + +// startOfLine represents the state where the next byte read from p.buf is the +// start of a line (or whitespace leading up to it). +func (p *TextParser) startOfLine() stateFn { + p.lineCount++ + if p.skipBlankTab(); p.err != nil { + // End of input reached. This is the only case where + // that is not an error but a signal that we are done. + p.err = nil + return nil + } + switch p.currentByte { + case '#': + return p.startComment + case '\n': + return p.startOfLine // Empty line, start the next one. + } + return p.readingMetricName +} + +// startComment represents the state where the next byte read from p.buf is the +// start of a comment (or whitespace leading up to it). +func (p *TextParser) startComment() stateFn { + if p.skipBlankTab(); p.err != nil { + return nil // Unexpected end of input. + } + if p.currentByte == '\n' { + return p.startOfLine + } + if p.readTokenUntilWhitespace(); p.err != nil { + return nil // Unexpected end of input. + } + // If we have hit the end of line already, there is nothing left + // to do. This is not considered a syntax error. + if p.currentByte == '\n' { + return p.startOfLine + } + keyword := p.currentToken.String() + if keyword != "HELP" && keyword != "TYPE" { + // Generic comment, ignore by fast forwarding to end of line. + for p.currentByte != '\n' { + if p.currentByte, p.err = p.buf.ReadByte(); p.err != nil { + return nil // Unexpected end of input. + } + } + return p.startOfLine + } + // There is something. Next has to be a metric name. + if p.skipBlankTab(); p.err != nil { + return nil // Unexpected end of input. + } + if p.readTokenAsMetricName(); p.err != nil { + return nil // Unexpected end of input. + } + if p.currentByte == '\n' { + // At the end of the line already. + // Again, this is not considered a syntax error. + return p.startOfLine + } + if !isBlankOrTab(p.currentByte) { + p.parseError("invalid metric name in comment") + return nil + } + p.setOrCreateCurrentMF() + if p.skipBlankTab(); p.err != nil { + return nil // Unexpected end of input. + } + if p.currentByte == '\n' { + // At the end of the line already. + // Again, this is not considered a syntax error. + return p.startOfLine + } + switch keyword { + case "HELP": + return p.readingHelp + case "TYPE": + return p.readingType + } + panic(fmt.Sprintf("code error: unexpected keyword %q", keyword)) +} + +// readingMetricName represents the state where the last byte read (now in +// p.currentByte) is the first byte of a metric name. +func (p *TextParser) readingMetricName() stateFn { + if p.readTokenAsMetricName(); p.err != nil { + return nil + } + if p.currentToken.Len() == 0 { + p.parseError("invalid metric name") + return nil + } + p.setOrCreateCurrentMF() + // Now is the time to fix the type if it hasn't happened yet. + if p.currentMF.Type == nil { + p.currentMF.Type = dto.MetricType_UNTYPED.Enum() + } + p.currentMetric = &dto.Metric{} + // Do not append the newly created currentMetric to + // currentMF.Metric right now. First wait if this is a summary, + // and the metric exists already, which we can only know after + // having read all the labels. + if p.skipBlankTabIfCurrentBlankTab(); p.err != nil { + return nil // Unexpected end of input. + } + return p.readingLabels +} + +// readingLabels represents the state where the last byte read (now in +// p.currentByte) is either the first byte of the label set (i.e. a '{'), or the +// first byte of the value (otherwise). +func (p *TextParser) readingLabels() stateFn { + // Summaries/histograms are special. We have to reset the + // currentLabels map, currentQuantile and currentBucket before starting to + // read labels. + if p.currentMF.GetType() == dto.MetricType_SUMMARY || p.currentMF.GetType() == dto.MetricType_HISTOGRAM { + p.currentLabels = map[string]string{} + p.currentLabels[string(model.MetricNameLabel)] = p.currentMF.GetName() + p.currentQuantile = math.NaN() + p.currentBucket = math.NaN() + } + if p.currentByte != '{' { + return p.readingValue + } + return p.startLabelName +} + +// startLabelName represents the state where the next byte read from p.buf is +// the start of a label name (or whitespace leading up to it). +func (p *TextParser) startLabelName() stateFn { + if p.skipBlankTab(); p.err != nil { + return nil // Unexpected end of input. + } + if p.currentByte == '}' { + if p.skipBlankTab(); p.err != nil { + return nil // Unexpected end of input. + } + return p.readingValue + } + if p.readTokenAsLabelName(); p.err != nil { + return nil // Unexpected end of input. + } + if p.currentToken.Len() == 0 { + p.parseError(fmt.Sprintf("invalid label name for metric %q", p.currentMF.GetName())) + return nil + } + p.currentLabelPair = &dto.LabelPair{Name: proto.String(p.currentToken.String())} + if p.currentLabelPair.GetName() == string(model.MetricNameLabel) { + p.parseError(fmt.Sprintf("label name %q is reserved", model.MetricNameLabel)) + return nil + } + // Special summary/histogram treatment. Don't add 'quantile' and 'le' + // labels to 'real' labels. + if !(p.currentMF.GetType() == dto.MetricType_SUMMARY && p.currentLabelPair.GetName() == model.QuantileLabel) && + !(p.currentMF.GetType() == dto.MetricType_HISTOGRAM && p.currentLabelPair.GetName() == model.BucketLabel) { + p.currentMetric.Label = append(p.currentMetric.Label, p.currentLabelPair) + } + if p.skipBlankTabIfCurrentBlankTab(); p.err != nil { + return nil // Unexpected end of input. + } + if p.currentByte != '=' { + p.parseError(fmt.Sprintf("expected '=' after label name, found %q", p.currentByte)) + return nil + } + return p.startLabelValue +} + +// startLabelValue represents the state where the next byte read from p.buf is +// the start of a (quoted) label value (or whitespace leading up to it). +func (p *TextParser) startLabelValue() stateFn { + if p.skipBlankTab(); p.err != nil { + return nil // Unexpected end of input. + } + if p.currentByte != '"' { + p.parseError(fmt.Sprintf("expected '\"' at start of label value, found %q", p.currentByte)) + return nil + } + if p.readTokenAsLabelValue(); p.err != nil { + return nil + } + if !model.LabelValue(p.currentToken.String()).IsValid() { + p.parseError(fmt.Sprintf("invalid label value %q", p.currentToken.String())) + return nil + } + p.currentLabelPair.Value = proto.String(p.currentToken.String()) + // Special treatment of summaries: + // - Quantile labels are special, will result in dto.Quantile later. + // - Other labels have to be added to currentLabels for signature calculation. + if p.currentMF.GetType() == dto.MetricType_SUMMARY { + if p.currentLabelPair.GetName() == model.QuantileLabel { + if p.currentQuantile, p.err = parseFloat(p.currentLabelPair.GetValue()); p.err != nil { + // Create a more helpful error message. + p.parseError(fmt.Sprintf("expected float as value for 'quantile' label, got %q", p.currentLabelPair.GetValue())) + return nil + } + } else { + p.currentLabels[p.currentLabelPair.GetName()] = p.currentLabelPair.GetValue() + } + } + // Similar special treatment of histograms. + if p.currentMF.GetType() == dto.MetricType_HISTOGRAM { + if p.currentLabelPair.GetName() == model.BucketLabel { + if p.currentBucket, p.err = parseFloat(p.currentLabelPair.GetValue()); p.err != nil { + // Create a more helpful error message. + p.parseError(fmt.Sprintf("expected float as value for 'le' label, got %q", p.currentLabelPair.GetValue())) + return nil + } + } else { + p.currentLabels[p.currentLabelPair.GetName()] = p.currentLabelPair.GetValue() + } + } + if p.skipBlankTab(); p.err != nil { + return nil // Unexpected end of input. + } + switch p.currentByte { + case ',': + return p.startLabelName + + case '}': + if p.skipBlankTab(); p.err != nil { + return nil // Unexpected end of input. + } + return p.readingValue + default: + p.parseError(fmt.Sprintf("unexpected end of label value %q", p.currentLabelPair.GetValue())) + return nil + } +} + +// readingValue represents the state where the last byte read (now in +// p.currentByte) is the first byte of the sample value (i.e. a float). +func (p *TextParser) readingValue() stateFn { + // When we are here, we have read all the labels, so for the + // special case of a summary/histogram, we can finally find out + // if the metric already exists. + if p.currentMF.GetType() == dto.MetricType_SUMMARY { + signature := model.LabelsToSignature(p.currentLabels) + if summary := p.summaries[signature]; summary != nil { + p.currentMetric = summary + } else { + p.summaries[signature] = p.currentMetric + p.currentMF.Metric = append(p.currentMF.Metric, p.currentMetric) + } + } else if p.currentMF.GetType() == dto.MetricType_HISTOGRAM { + signature := model.LabelsToSignature(p.currentLabels) + if histogram := p.histograms[signature]; histogram != nil { + p.currentMetric = histogram + } else { + p.histograms[signature] = p.currentMetric + p.currentMF.Metric = append(p.currentMF.Metric, p.currentMetric) + } + } else { + p.currentMF.Metric = append(p.currentMF.Metric, p.currentMetric) + } + if p.readTokenUntilWhitespace(); p.err != nil { + return nil // Unexpected end of input. + } + value, err := parseFloat(p.currentToken.String()) + if err != nil { + // Create a more helpful error message. + p.parseError(fmt.Sprintf("expected float as value, got %q", p.currentToken.String())) + return nil + } + switch p.currentMF.GetType() { + case dto.MetricType_COUNTER: + p.currentMetric.Counter = &dto.Counter{Value: proto.Float64(value)} + case dto.MetricType_GAUGE: + p.currentMetric.Gauge = &dto.Gauge{Value: proto.Float64(value)} + case dto.MetricType_UNTYPED: + p.currentMetric.Untyped = &dto.Untyped{Value: proto.Float64(value)} + case dto.MetricType_SUMMARY: + // *sigh* + if p.currentMetric.Summary == nil { + p.currentMetric.Summary = &dto.Summary{} + } + switch { + case p.currentIsSummaryCount: + p.currentMetric.Summary.SampleCount = proto.Uint64(uint64(value)) + case p.currentIsSummarySum: + p.currentMetric.Summary.SampleSum = proto.Float64(value) + case !math.IsNaN(p.currentQuantile): + p.currentMetric.Summary.Quantile = append( + p.currentMetric.Summary.Quantile, + &dto.Quantile{ + Quantile: proto.Float64(p.currentQuantile), + Value: proto.Float64(value), + }, + ) + } + case dto.MetricType_HISTOGRAM: + // *sigh* + if p.currentMetric.Histogram == nil { + p.currentMetric.Histogram = &dto.Histogram{} + } + switch { + case p.currentIsHistogramCount: + p.currentMetric.Histogram.SampleCount = proto.Uint64(uint64(value)) + case p.currentIsHistogramSum: + p.currentMetric.Histogram.SampleSum = proto.Float64(value) + case !math.IsNaN(p.currentBucket): + p.currentMetric.Histogram.Bucket = append( + p.currentMetric.Histogram.Bucket, + &dto.Bucket{ + UpperBound: proto.Float64(p.currentBucket), + CumulativeCount: proto.Uint64(uint64(value)), + }, + ) + } + default: + p.err = fmt.Errorf("unexpected type for metric name %q", p.currentMF.GetName()) + } + if p.currentByte == '\n' { + return p.startOfLine + } + return p.startTimestamp +} + +// startTimestamp represents the state where the next byte read from p.buf is +// the start of the timestamp (or whitespace leading up to it). +func (p *TextParser) startTimestamp() stateFn { + if p.skipBlankTab(); p.err != nil { + return nil // Unexpected end of input. + } + if p.readTokenUntilWhitespace(); p.err != nil { + return nil // Unexpected end of input. + } + timestamp, err := strconv.ParseInt(p.currentToken.String(), 10, 64) + if err != nil { + // Create a more helpful error message. + p.parseError(fmt.Sprintf("expected integer as timestamp, got %q", p.currentToken.String())) + return nil + } + p.currentMetric.TimestampMs = proto.Int64(timestamp) + if p.readTokenUntilNewline(false); p.err != nil { + return nil // Unexpected end of input. + } + if p.currentToken.Len() > 0 { + p.parseError(fmt.Sprintf("spurious string after timestamp: %q", p.currentToken.String())) + return nil + } + return p.startOfLine +} + +// readingHelp represents the state where the last byte read (now in +// p.currentByte) is the first byte of the docstring after 'HELP'. +func (p *TextParser) readingHelp() stateFn { + if p.currentMF.Help != nil { + p.parseError(fmt.Sprintf("second HELP line for metric name %q", p.currentMF.GetName())) + return nil + } + // Rest of line is the docstring. + if p.readTokenUntilNewline(true); p.err != nil { + return nil // Unexpected end of input. + } + p.currentMF.Help = proto.String(p.currentToken.String()) + return p.startOfLine +} + +// readingType represents the state where the last byte read (now in +// p.currentByte) is the first byte of the type hint after 'HELP'. +func (p *TextParser) readingType() stateFn { + if p.currentMF.Type != nil { + p.parseError(fmt.Sprintf("second TYPE line for metric name %q, or TYPE reported after samples", p.currentMF.GetName())) + return nil + } + // Rest of line is the type. + if p.readTokenUntilNewline(false); p.err != nil { + return nil // Unexpected end of input. + } + metricType, ok := dto.MetricType_value[strings.ToUpper(p.currentToken.String())] + if !ok { + p.parseError(fmt.Sprintf("unknown metric type %q", p.currentToken.String())) + return nil + } + p.currentMF.Type = dto.MetricType(metricType).Enum() + return p.startOfLine +} + +// parseError sets p.err to a ParseError at the current line with the given +// message. +func (p *TextParser) parseError(msg string) { + p.err = ParseError{ + Line: p.lineCount, + Msg: msg, + } +} + +// skipBlankTab reads (and discards) bytes from p.buf until it encounters a byte +// that is neither ' ' nor '\t'. That byte is left in p.currentByte. +func (p *TextParser) skipBlankTab() { + for { + if p.currentByte, p.err = p.buf.ReadByte(); p.err != nil || !isBlankOrTab(p.currentByte) { + return + } + } +} + +// skipBlankTabIfCurrentBlankTab works exactly as skipBlankTab but doesn't do +// anything if p.currentByte is neither ' ' nor '\t'. +func (p *TextParser) skipBlankTabIfCurrentBlankTab() { + if isBlankOrTab(p.currentByte) { + p.skipBlankTab() + } +} + +// readTokenUntilWhitespace copies bytes from p.buf into p.currentToken. The +// first byte considered is the byte already read (now in p.currentByte). The +// first whitespace byte encountered is still copied into p.currentByte, but not +// into p.currentToken. +func (p *TextParser) readTokenUntilWhitespace() { + p.currentToken.Reset() + for p.err == nil && !isBlankOrTab(p.currentByte) && p.currentByte != '\n' { + p.currentToken.WriteByte(p.currentByte) + p.currentByte, p.err = p.buf.ReadByte() + } +} + +// readTokenUntilNewline copies bytes from p.buf into p.currentToken. The first +// byte considered is the byte already read (now in p.currentByte). The first +// newline byte encountered is still copied into p.currentByte, but not into +// p.currentToken. If recognizeEscapeSequence is true, two escape sequences are +// recognized: '\\' translates into '\', and '\n' into a line-feed character. +// All other escape sequences are invalid and cause an error. +func (p *TextParser) readTokenUntilNewline(recognizeEscapeSequence bool) { + p.currentToken.Reset() + escaped := false + for p.err == nil { + if recognizeEscapeSequence && escaped { + switch p.currentByte { + case '\\': + p.currentToken.WriteByte(p.currentByte) + case 'n': + p.currentToken.WriteByte('\n') + default: + p.parseError(fmt.Sprintf("invalid escape sequence '\\%c'", p.currentByte)) + return + } + escaped = false + } else { + switch p.currentByte { + case '\n': + return + case '\\': + escaped = true + default: + p.currentToken.WriteByte(p.currentByte) + } + } + p.currentByte, p.err = p.buf.ReadByte() + } +} + +// readTokenAsMetricName copies a metric name from p.buf into p.currentToken. +// The first byte considered is the byte already read (now in p.currentByte). +// The first byte not part of a metric name is still copied into p.currentByte, +// but not into p.currentToken. +func (p *TextParser) readTokenAsMetricName() { + p.currentToken.Reset() + if !isValidMetricNameStart(p.currentByte) { + return + } + for { + p.currentToken.WriteByte(p.currentByte) + p.currentByte, p.err = p.buf.ReadByte() + if p.err != nil || !isValidMetricNameContinuation(p.currentByte) { + return + } + } +} + +// readTokenAsLabelName copies a label name from p.buf into p.currentToken. +// The first byte considered is the byte already read (now in p.currentByte). +// The first byte not part of a label name is still copied into p.currentByte, +// but not into p.currentToken. +func (p *TextParser) readTokenAsLabelName() { + p.currentToken.Reset() + if !isValidLabelNameStart(p.currentByte) { + return + } + for { + p.currentToken.WriteByte(p.currentByte) + p.currentByte, p.err = p.buf.ReadByte() + if p.err != nil || !isValidLabelNameContinuation(p.currentByte) { + return + } + } +} + +// readTokenAsLabelValue copies a label value from p.buf into p.currentToken. +// In contrast to the other 'readTokenAs...' functions, which start with the +// last read byte in p.currentByte, this method ignores p.currentByte and starts +// with reading a new byte from p.buf. The first byte not part of a label value +// is still copied into p.currentByte, but not into p.currentToken. +func (p *TextParser) readTokenAsLabelValue() { + p.currentToken.Reset() + escaped := false + for { + if p.currentByte, p.err = p.buf.ReadByte(); p.err != nil { + return + } + if escaped { + switch p.currentByte { + case '"', '\\': + p.currentToken.WriteByte(p.currentByte) + case 'n': + p.currentToken.WriteByte('\n') + default: + p.parseError(fmt.Sprintf("invalid escape sequence '\\%c'", p.currentByte)) + return + } + escaped = false + continue + } + switch p.currentByte { + case '"': + return + case '\n': + p.parseError(fmt.Sprintf("label value %q contains unescaped new-line", p.currentToken.String())) + return + case '\\': + escaped = true + default: + p.currentToken.WriteByte(p.currentByte) + } + } +} + +func (p *TextParser) setOrCreateCurrentMF() { + p.currentIsSummaryCount = false + p.currentIsSummarySum = false + p.currentIsHistogramCount = false + p.currentIsHistogramSum = false + name := p.currentToken.String() + if p.currentMF = p.metricFamiliesByName[name]; p.currentMF != nil { + return + } + // Try out if this is a _sum or _count for a summary/histogram. + summaryName := summaryMetricName(name) + if p.currentMF = p.metricFamiliesByName[summaryName]; p.currentMF != nil { + if p.currentMF.GetType() == dto.MetricType_SUMMARY { + if isCount(name) { + p.currentIsSummaryCount = true + } + if isSum(name) { + p.currentIsSummarySum = true + } + return + } + } + histogramName := histogramMetricName(name) + if p.currentMF = p.metricFamiliesByName[histogramName]; p.currentMF != nil { + if p.currentMF.GetType() == dto.MetricType_HISTOGRAM { + if isCount(name) { + p.currentIsHistogramCount = true + } + if isSum(name) { + p.currentIsHistogramSum = true + } + return + } + } + p.currentMF = &dto.MetricFamily{Name: proto.String(name)} + p.metricFamiliesByName[name] = p.currentMF +} + +func isValidLabelNameStart(b byte) bool { + return (b >= 'a' && b <= 'z') || (b >= 'A' && b <= 'Z') || b == '_' +} + +func isValidLabelNameContinuation(b byte) bool { + return isValidLabelNameStart(b) || (b >= '0' && b <= '9') +} + +func isValidMetricNameStart(b byte) bool { + return isValidLabelNameStart(b) || b == ':' +} + +func isValidMetricNameContinuation(b byte) bool { + return isValidLabelNameContinuation(b) || b == ':' +} + +func isBlankOrTab(b byte) bool { + return b == ' ' || b == '\t' +} + +func isCount(name string) bool { + return len(name) > 6 && name[len(name)-6:] == "_count" +} + +func isSum(name string) bool { + return len(name) > 4 && name[len(name)-4:] == "_sum" +} + +func isBucket(name string) bool { + return len(name) > 7 && name[len(name)-7:] == "_bucket" +} + +func summaryMetricName(name string) string { + switch { + case isCount(name): + return name[:len(name)-6] + case isSum(name): + return name[:len(name)-4] + default: + return name + } +} + +func histogramMetricName(name string) string { + switch { + case isCount(name): + return name[:len(name)-6] + case isSum(name): + return name[:len(name)-4] + case isBucket(name): + return name[:len(name)-7] + default: + return name + } +} + +func parseFloat(s string) (float64, error) { + if strings.ContainsAny(s, "pP_") { + return 0, fmt.Errorf("unsupported character in float") + } + return strconv.ParseFloat(s, 64) +} diff --git a/vendor/github.com/prometheus/common/internal/bitbucket.org/ww/goautoneg/README.txt b/vendor/github.com/prometheus/common/internal/bitbucket.org/ww/goautoneg/README.txt new file mode 100644 index 00000000..7723656d --- /dev/null +++ b/vendor/github.com/prometheus/common/internal/bitbucket.org/ww/goautoneg/README.txt @@ -0,0 +1,67 @@ +PACKAGE + +package goautoneg +import "bitbucket.org/ww/goautoneg" + +HTTP Content-Type Autonegotiation. + +The functions in this package implement the behaviour specified in +http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html + +Copyright (c) 2011, Open Knowledge Foundation Ltd. +All rights reserved. + +Redistribution and use in source and binary forms, with or without +modification, are permitted provided that the following conditions are +met: + + Redistributions of source code must retain the above copyright + notice, this list of conditions and the following disclaimer. + + Redistributions in binary form must reproduce the above copyright + notice, this list of conditions and the following disclaimer in + the documentation and/or other materials provided with the + distribution. + + Neither the name of the Open Knowledge Foundation Ltd. nor the + names of its contributors may be used to endorse or promote + products derived from this software without specific prior written + permission. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + + +FUNCTIONS + +func Negotiate(header string, alternatives []string) (content_type string) +Negotiate the most appropriate content_type given the accept header +and a list of alternatives. + +func ParseAccept(header string) (accept []Accept) +Parse an Accept Header string returning a sorted list +of clauses + + +TYPES + +type Accept struct { + Type, SubType string + Q float32 + Params map[string]string +} +Structure to represent a clause in an HTTP Accept Header + + +SUBDIRECTORIES + + .hg diff --git a/vendor/github.com/prometheus/common/internal/bitbucket.org/ww/goautoneg/autoneg.go b/vendor/github.com/prometheus/common/internal/bitbucket.org/ww/goautoneg/autoneg.go new file mode 100644 index 00000000..26e92288 --- /dev/null +++ b/vendor/github.com/prometheus/common/internal/bitbucket.org/ww/goautoneg/autoneg.go @@ -0,0 +1,162 @@ +/* +Copyright (c) 2011, Open Knowledge Foundation Ltd. +All rights reserved. + +HTTP Content-Type Autonegotiation. + +The functions in this package implement the behaviour specified in +http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html + +Redistribution and use in source and binary forms, with or without +modification, are permitted provided that the following conditions are +met: + + Redistributions of source code must retain the above copyright + notice, this list of conditions and the following disclaimer. + + Redistributions in binary form must reproduce the above copyright + notice, this list of conditions and the following disclaimer in + the documentation and/or other materials provided with the + distribution. + + Neither the name of the Open Knowledge Foundation Ltd. nor the + names of its contributors may be used to endorse or promote + products derived from this software without specific prior written + permission. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + + +*/ +package goautoneg + +import ( + "sort" + "strconv" + "strings" +) + +// Structure to represent a clause in an HTTP Accept Header +type Accept struct { + Type, SubType string + Q float64 + Params map[string]string +} + +// For internal use, so that we can use the sort interface +type accept_slice []Accept + +func (accept accept_slice) Len() int { + slice := []Accept(accept) + return len(slice) +} + +func (accept accept_slice) Less(i, j int) bool { + slice := []Accept(accept) + ai, aj := slice[i], slice[j] + if ai.Q > aj.Q { + return true + } + if ai.Type != "*" && aj.Type == "*" { + return true + } + if ai.SubType != "*" && aj.SubType == "*" { + return true + } + return false +} + +func (accept accept_slice) Swap(i, j int) { + slice := []Accept(accept) + slice[i], slice[j] = slice[j], slice[i] +} + +// Parse an Accept Header string returning a sorted list +// of clauses +func ParseAccept(header string) (accept []Accept) { + parts := strings.Split(header, ",") + accept = make([]Accept, 0, len(parts)) + for _, part := range parts { + part := strings.Trim(part, " ") + + a := Accept{} + a.Params = make(map[string]string) + a.Q = 1.0 + + mrp := strings.Split(part, ";") + + media_range := mrp[0] + sp := strings.Split(media_range, "/") + a.Type = strings.Trim(sp[0], " ") + + switch { + case len(sp) == 1 && a.Type == "*": + a.SubType = "*" + case len(sp) == 2: + a.SubType = strings.Trim(sp[1], " ") + default: + continue + } + + if len(mrp) == 1 { + accept = append(accept, a) + continue + } + + for _, param := range mrp[1:] { + sp := strings.SplitN(param, "=", 2) + if len(sp) != 2 { + continue + } + token := strings.Trim(sp[0], " ") + if token == "q" { + a.Q, _ = strconv.ParseFloat(sp[1], 32) + } else { + a.Params[token] = strings.Trim(sp[1], " ") + } + } + + accept = append(accept, a) + } + + slice := accept_slice(accept) + sort.Sort(slice) + + return +} + +// Negotiate the most appropriate content_type given the accept header +// and a list of alternatives. +func Negotiate(header string, alternatives []string) (content_type string) { + asp := make([][]string, 0, len(alternatives)) + for _, ctype := range alternatives { + asp = append(asp, strings.SplitN(ctype, "/", 2)) + } + for _, clause := range ParseAccept(header) { + for i, ctsp := range asp { + if clause.Type == ctsp[0] && clause.SubType == ctsp[1] { + content_type = alternatives[i] + return + } + if clause.Type == ctsp[0] && clause.SubType == "*" { + content_type = alternatives[i] + return + } + if clause.Type == "*" && clause.SubType == "*" { + content_type = alternatives[i] + return + } + } + } + return +} diff --git a/vendor/github.com/prometheus/common/model/alert.go b/vendor/github.com/prometheus/common/model/alert.go new file mode 100644 index 00000000..35e739c7 --- /dev/null +++ b/vendor/github.com/prometheus/common/model/alert.go @@ -0,0 +1,136 @@ +// Copyright 2013 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package model + +import ( + "fmt" + "time" +) + +type AlertStatus string + +const ( + AlertFiring AlertStatus = "firing" + AlertResolved AlertStatus = "resolved" +) + +// Alert is a generic representation of an alert in the Prometheus eco-system. +type Alert struct { + // Label value pairs for purpose of aggregation, matching, and disposition + // dispatching. This must minimally include an "alertname" label. + Labels LabelSet `json:"labels"` + + // Extra key/value information which does not define alert identity. + Annotations LabelSet `json:"annotations"` + + // The known time range for this alert. Both ends are optional. + StartsAt time.Time `json:"startsAt,omitempty"` + EndsAt time.Time `json:"endsAt,omitempty"` + GeneratorURL string `json:"generatorURL"` +} + +// Name returns the name of the alert. It is equivalent to the "alertname" label. +func (a *Alert) Name() string { + return string(a.Labels[AlertNameLabel]) +} + +// Fingerprint returns a unique hash for the alert. It is equivalent to +// the fingerprint of the alert's label set. +func (a *Alert) Fingerprint() Fingerprint { + return a.Labels.Fingerprint() +} + +func (a *Alert) String() string { + s := fmt.Sprintf("%s[%s]", a.Name(), a.Fingerprint().String()[:7]) + if a.Resolved() { + return s + "[resolved]" + } + return s + "[active]" +} + +// Resolved returns true iff the activity interval ended in the past. +func (a *Alert) Resolved() bool { + return a.ResolvedAt(time.Now()) +} + +// ResolvedAt returns true off the activity interval ended before +// the given timestamp. +func (a *Alert) ResolvedAt(ts time.Time) bool { + if a.EndsAt.IsZero() { + return false + } + return !a.EndsAt.After(ts) +} + +// Status returns the status of the alert. +func (a *Alert) Status() AlertStatus { + if a.Resolved() { + return AlertResolved + } + return AlertFiring +} + +// Validate checks whether the alert data is inconsistent. +func (a *Alert) Validate() error { + if a.StartsAt.IsZero() { + return fmt.Errorf("start time missing") + } + if !a.EndsAt.IsZero() && a.EndsAt.Before(a.StartsAt) { + return fmt.Errorf("start time must be before end time") + } + if err := a.Labels.Validate(); err != nil { + return fmt.Errorf("invalid label set: %s", err) + } + if len(a.Labels) == 0 { + return fmt.Errorf("at least one label pair required") + } + if err := a.Annotations.Validate(); err != nil { + return fmt.Errorf("invalid annotations: %s", err) + } + return nil +} + +// Alert is a list of alerts that can be sorted in chronological order. +type Alerts []*Alert + +func (as Alerts) Len() int { return len(as) } +func (as Alerts) Swap(i, j int) { as[i], as[j] = as[j], as[i] } + +func (as Alerts) Less(i, j int) bool { + if as[i].StartsAt.Before(as[j].StartsAt) { + return true + } + if as[i].EndsAt.Before(as[j].EndsAt) { + return true + } + return as[i].Fingerprint() < as[j].Fingerprint() +} + +// HasFiring returns true iff one of the alerts is not resolved. +func (as Alerts) HasFiring() bool { + for _, a := range as { + if !a.Resolved() { + return true + } + } + return false +} + +// Status returns StatusFiring iff at least one of the alerts is firing. +func (as Alerts) Status() AlertStatus { + if as.HasFiring() { + return AlertFiring + } + return AlertResolved +} diff --git a/vendor/github.com/prometheus/common/model/fingerprinting.go b/vendor/github.com/prometheus/common/model/fingerprinting.go new file mode 100644 index 00000000..fc4de410 --- /dev/null +++ b/vendor/github.com/prometheus/common/model/fingerprinting.go @@ -0,0 +1,105 @@ +// Copyright 2013 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package model + +import ( + "fmt" + "strconv" +) + +// Fingerprint provides a hash-capable representation of a Metric. +// For our purposes, FNV-1A 64-bit is used. +type Fingerprint uint64 + +// FingerprintFromString transforms a string representation into a Fingerprint. +func FingerprintFromString(s string) (Fingerprint, error) { + num, err := strconv.ParseUint(s, 16, 64) + return Fingerprint(num), err +} + +// ParseFingerprint parses the input string into a fingerprint. +func ParseFingerprint(s string) (Fingerprint, error) { + num, err := strconv.ParseUint(s, 16, 64) + if err != nil { + return 0, err + } + return Fingerprint(num), nil +} + +func (f Fingerprint) String() string { + return fmt.Sprintf("%016x", uint64(f)) +} + +// Fingerprints represents a collection of Fingerprint subject to a given +// natural sorting scheme. It implements sort.Interface. +type Fingerprints []Fingerprint + +// Len implements sort.Interface. +func (f Fingerprints) Len() int { + return len(f) +} + +// Less implements sort.Interface. +func (f Fingerprints) Less(i, j int) bool { + return f[i] < f[j] +} + +// Swap implements sort.Interface. +func (f Fingerprints) Swap(i, j int) { + f[i], f[j] = f[j], f[i] +} + +// FingerprintSet is a set of Fingerprints. +type FingerprintSet map[Fingerprint]struct{} + +// Equal returns true if both sets contain the same elements (and not more). +func (s FingerprintSet) Equal(o FingerprintSet) bool { + if len(s) != len(o) { + return false + } + + for k := range s { + if _, ok := o[k]; !ok { + return false + } + } + + return true +} + +// Intersection returns the elements contained in both sets. +func (s FingerprintSet) Intersection(o FingerprintSet) FingerprintSet { + myLength, otherLength := len(s), len(o) + if myLength == 0 || otherLength == 0 { + return FingerprintSet{} + } + + subSet := s + superSet := o + + if otherLength < myLength { + subSet = o + superSet = s + } + + out := FingerprintSet{} + + for k := range subSet { + if _, ok := superSet[k]; ok { + out[k] = struct{}{} + } + } + + return out +} diff --git a/vendor/github.com/prometheus/common/model/fnv.go b/vendor/github.com/prometheus/common/model/fnv.go new file mode 100644 index 00000000..038fc1c9 --- /dev/null +++ b/vendor/github.com/prometheus/common/model/fnv.go @@ -0,0 +1,42 @@ +// Copyright 2015 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package model + +// Inline and byte-free variant of hash/fnv's fnv64a. + +const ( + offset64 = 14695981039346656037 + prime64 = 1099511628211 +) + +// hashNew initializies a new fnv64a hash value. +func hashNew() uint64 { + return offset64 +} + +// hashAdd adds a string to a fnv64a hash value, returning the updated hash. +func hashAdd(h uint64, s string) uint64 { + for i := 0; i < len(s); i++ { + h ^= uint64(s[i]) + h *= prime64 + } + return h +} + +// hashAddByte adds a byte to a fnv64a hash value, returning the updated hash. +func hashAddByte(h uint64, b byte) uint64 { + h ^= uint64(b) + h *= prime64 + return h +} diff --git a/vendor/github.com/prometheus/common/model/labels.go b/vendor/github.com/prometheus/common/model/labels.go new file mode 100644 index 00000000..41051a01 --- /dev/null +++ b/vendor/github.com/prometheus/common/model/labels.go @@ -0,0 +1,210 @@ +// Copyright 2013 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package model + +import ( + "encoding/json" + "fmt" + "regexp" + "strings" + "unicode/utf8" +) + +const ( + // AlertNameLabel is the name of the label containing the an alert's name. + AlertNameLabel = "alertname" + + // ExportedLabelPrefix is the prefix to prepend to the label names present in + // exported metrics if a label of the same name is added by the server. + ExportedLabelPrefix = "exported_" + + // MetricNameLabel is the label name indicating the metric name of a + // timeseries. + MetricNameLabel = "__name__" + + // SchemeLabel is the name of the label that holds the scheme on which to + // scrape a target. + SchemeLabel = "__scheme__" + + // AddressLabel is the name of the label that holds the address of + // a scrape target. + AddressLabel = "__address__" + + // MetricsPathLabel is the name of the label that holds the path on which to + // scrape a target. + MetricsPathLabel = "__metrics_path__" + + // ReservedLabelPrefix is a prefix which is not legal in user-supplied + // label names. + ReservedLabelPrefix = "__" + + // MetaLabelPrefix is a prefix for labels that provide meta information. + // Labels with this prefix are used for intermediate label processing and + // will not be attached to time series. + MetaLabelPrefix = "__meta_" + + // TmpLabelPrefix is a prefix for temporary labels as part of relabelling. + // Labels with this prefix are used for intermediate label processing and + // will not be attached to time series. This is reserved for use in + // Prometheus configuration files by users. + TmpLabelPrefix = "__tmp_" + + // ParamLabelPrefix is a prefix for labels that provide URL parameters + // used to scrape a target. + ParamLabelPrefix = "__param_" + + // JobLabel is the label name indicating the job from which a timeseries + // was scraped. + JobLabel = "job" + + // InstanceLabel is the label name used for the instance label. + InstanceLabel = "instance" + + // BucketLabel is used for the label that defines the upper bound of a + // bucket of a histogram ("le" -> "less or equal"). + BucketLabel = "le" + + // QuantileLabel is used for the label that defines the quantile in a + // summary. + QuantileLabel = "quantile" +) + +// LabelNameRE is a regular expression matching valid label names. Note that the +// IsValid method of LabelName performs the same check but faster than a match +// with this regular expression. +var LabelNameRE = regexp.MustCompile("^[a-zA-Z_][a-zA-Z0-9_]*$") + +// A LabelName is a key for a LabelSet or Metric. It has a value associated +// therewith. +type LabelName string + +// IsValid is true iff the label name matches the pattern of LabelNameRE. This +// method, however, does not use LabelNameRE for the check but a much faster +// hardcoded implementation. +func (ln LabelName) IsValid() bool { + if len(ln) == 0 { + return false + } + for i, b := range ln { + if !((b >= 'a' && b <= 'z') || (b >= 'A' && b <= 'Z') || b == '_' || (b >= '0' && b <= '9' && i > 0)) { + return false + } + } + return true +} + +// UnmarshalYAML implements the yaml.Unmarshaler interface. +func (ln *LabelName) UnmarshalYAML(unmarshal func(interface{}) error) error { + var s string + if err := unmarshal(&s); err != nil { + return err + } + if !LabelName(s).IsValid() { + return fmt.Errorf("%q is not a valid label name", s) + } + *ln = LabelName(s) + return nil +} + +// UnmarshalJSON implements the json.Unmarshaler interface. +func (ln *LabelName) UnmarshalJSON(b []byte) error { + var s string + if err := json.Unmarshal(b, &s); err != nil { + return err + } + if !LabelName(s).IsValid() { + return fmt.Errorf("%q is not a valid label name", s) + } + *ln = LabelName(s) + return nil +} + +// LabelNames is a sortable LabelName slice. In implements sort.Interface. +type LabelNames []LabelName + +func (l LabelNames) Len() int { + return len(l) +} + +func (l LabelNames) Less(i, j int) bool { + return l[i] < l[j] +} + +func (l LabelNames) Swap(i, j int) { + l[i], l[j] = l[j], l[i] +} + +func (l LabelNames) String() string { + labelStrings := make([]string, 0, len(l)) + for _, label := range l { + labelStrings = append(labelStrings, string(label)) + } + return strings.Join(labelStrings, ", ") +} + +// A LabelValue is an associated value for a LabelName. +type LabelValue string + +// IsValid returns true iff the string is a valid UTF8. +func (lv LabelValue) IsValid() bool { + return utf8.ValidString(string(lv)) +} + +// LabelValues is a sortable LabelValue slice. It implements sort.Interface. +type LabelValues []LabelValue + +func (l LabelValues) Len() int { + return len(l) +} + +func (l LabelValues) Less(i, j int) bool { + return string(l[i]) < string(l[j]) +} + +func (l LabelValues) Swap(i, j int) { + l[i], l[j] = l[j], l[i] +} + +// LabelPair pairs a name with a value. +type LabelPair struct { + Name LabelName + Value LabelValue +} + +// LabelPairs is a sortable slice of LabelPair pointers. It implements +// sort.Interface. +type LabelPairs []*LabelPair + +func (l LabelPairs) Len() int { + return len(l) +} + +func (l LabelPairs) Less(i, j int) bool { + switch { + case l[i].Name > l[j].Name: + return false + case l[i].Name < l[j].Name: + return true + case l[i].Value > l[j].Value: + return false + case l[i].Value < l[j].Value: + return true + default: + return false + } +} + +func (l LabelPairs) Swap(i, j int) { + l[i], l[j] = l[j], l[i] +} diff --git a/vendor/github.com/prometheus/common/model/labelset.go b/vendor/github.com/prometheus/common/model/labelset.go new file mode 100644 index 00000000..6eda08a7 --- /dev/null +++ b/vendor/github.com/prometheus/common/model/labelset.go @@ -0,0 +1,169 @@ +// Copyright 2013 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package model + +import ( + "encoding/json" + "fmt" + "sort" + "strings" +) + +// A LabelSet is a collection of LabelName and LabelValue pairs. The LabelSet +// may be fully-qualified down to the point where it may resolve to a single +// Metric in the data store or not. All operations that occur within the realm +// of a LabelSet can emit a vector of Metric entities to which the LabelSet may +// match. +type LabelSet map[LabelName]LabelValue + +// Validate checks whether all names and values in the label set +// are valid. +func (ls LabelSet) Validate() error { + for ln, lv := range ls { + if !ln.IsValid() { + return fmt.Errorf("invalid name %q", ln) + } + if !lv.IsValid() { + return fmt.Errorf("invalid value %q", lv) + } + } + return nil +} + +// Equal returns true iff both label sets have exactly the same key/value pairs. +func (ls LabelSet) Equal(o LabelSet) bool { + if len(ls) != len(o) { + return false + } + for ln, lv := range ls { + olv, ok := o[ln] + if !ok { + return false + } + if olv != lv { + return false + } + } + return true +} + +// Before compares the metrics, using the following criteria: +// +// If m has fewer labels than o, it is before o. If it has more, it is not. +// +// If the number of labels is the same, the superset of all label names is +// sorted alphanumerically. The first differing label pair found in that order +// determines the outcome: If the label does not exist at all in m, then m is +// before o, and vice versa. Otherwise the label value is compared +// alphanumerically. +// +// If m and o are equal, the method returns false. +func (ls LabelSet) Before(o LabelSet) bool { + if len(ls) < len(o) { + return true + } + if len(ls) > len(o) { + return false + } + + lns := make(LabelNames, 0, len(ls)+len(o)) + for ln := range ls { + lns = append(lns, ln) + } + for ln := range o { + lns = append(lns, ln) + } + // It's probably not worth it to de-dup lns. + sort.Sort(lns) + for _, ln := range lns { + mlv, ok := ls[ln] + if !ok { + return true + } + olv, ok := o[ln] + if !ok { + return false + } + if mlv < olv { + return true + } + if mlv > olv { + return false + } + } + return false +} + +// Clone returns a copy of the label set. +func (ls LabelSet) Clone() LabelSet { + lsn := make(LabelSet, len(ls)) + for ln, lv := range ls { + lsn[ln] = lv + } + return lsn +} + +// Merge is a helper function to non-destructively merge two label sets. +func (l LabelSet) Merge(other LabelSet) LabelSet { + result := make(LabelSet, len(l)) + + for k, v := range l { + result[k] = v + } + + for k, v := range other { + result[k] = v + } + + return result +} + +func (l LabelSet) String() string { + lstrs := make([]string, 0, len(l)) + for l, v := range l { + lstrs = append(lstrs, fmt.Sprintf("%s=%q", l, v)) + } + + sort.Strings(lstrs) + return fmt.Sprintf("{%s}", strings.Join(lstrs, ", ")) +} + +// Fingerprint returns the LabelSet's fingerprint. +func (ls LabelSet) Fingerprint() Fingerprint { + return labelSetToFingerprint(ls) +} + +// FastFingerprint returns the LabelSet's Fingerprint calculated by a faster hashing +// algorithm, which is, however, more susceptible to hash collisions. +func (ls LabelSet) FastFingerprint() Fingerprint { + return labelSetToFastFingerprint(ls) +} + +// UnmarshalJSON implements the json.Unmarshaler interface. +func (l *LabelSet) UnmarshalJSON(b []byte) error { + var m map[LabelName]LabelValue + if err := json.Unmarshal(b, &m); err != nil { + return err + } + // encoding/json only unmarshals maps of the form map[string]T. It treats + // LabelName as a string and does not call its UnmarshalJSON method. + // Thus, we have to replicate the behavior here. + for ln := range m { + if !ln.IsValid() { + return fmt.Errorf("%q is not a valid label name", ln) + } + } + *l = LabelSet(m) + return nil +} diff --git a/vendor/github.com/prometheus/common/model/metric.go b/vendor/github.com/prometheus/common/model/metric.go new file mode 100644 index 00000000..00804b7f --- /dev/null +++ b/vendor/github.com/prometheus/common/model/metric.go @@ -0,0 +1,102 @@ +// Copyright 2013 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package model + +import ( + "fmt" + "regexp" + "sort" + "strings" +) + +var ( + // MetricNameRE is a regular expression matching valid metric + // names. Note that the IsValidMetricName function performs the same + // check but faster than a match with this regular expression. + MetricNameRE = regexp.MustCompile(`^[a-zA-Z_:][a-zA-Z0-9_:]*$`) +) + +// A Metric is similar to a LabelSet, but the key difference is that a Metric is +// a singleton and refers to one and only one stream of samples. +type Metric LabelSet + +// Equal compares the metrics. +func (m Metric) Equal(o Metric) bool { + return LabelSet(m).Equal(LabelSet(o)) +} + +// Before compares the metrics' underlying label sets. +func (m Metric) Before(o Metric) bool { + return LabelSet(m).Before(LabelSet(o)) +} + +// Clone returns a copy of the Metric. +func (m Metric) Clone() Metric { + clone := make(Metric, len(m)) + for k, v := range m { + clone[k] = v + } + return clone +} + +func (m Metric) String() string { + metricName, hasName := m[MetricNameLabel] + numLabels := len(m) - 1 + if !hasName { + numLabels = len(m) + } + labelStrings := make([]string, 0, numLabels) + for label, value := range m { + if label != MetricNameLabel { + labelStrings = append(labelStrings, fmt.Sprintf("%s=%q", label, value)) + } + } + + switch numLabels { + case 0: + if hasName { + return string(metricName) + } + return "{}" + default: + sort.Strings(labelStrings) + return fmt.Sprintf("%s{%s}", metricName, strings.Join(labelStrings, ", ")) + } +} + +// Fingerprint returns a Metric's Fingerprint. +func (m Metric) Fingerprint() Fingerprint { + return LabelSet(m).Fingerprint() +} + +// FastFingerprint returns a Metric's Fingerprint calculated by a faster hashing +// algorithm, which is, however, more susceptible to hash collisions. +func (m Metric) FastFingerprint() Fingerprint { + return LabelSet(m).FastFingerprint() +} + +// IsValidMetricName returns true iff name matches the pattern of MetricNameRE. +// This function, however, does not use MetricNameRE for the check but a much +// faster hardcoded implementation. +func IsValidMetricName(n LabelValue) bool { + if len(n) == 0 { + return false + } + for i, b := range n { + if !((b >= 'a' && b <= 'z') || (b >= 'A' && b <= 'Z') || b == '_' || b == ':' || (b >= '0' && b <= '9' && i > 0)) { + return false + } + } + return true +} diff --git a/vendor/github.com/prometheus/common/model/model.go b/vendor/github.com/prometheus/common/model/model.go new file mode 100644 index 00000000..a7b96917 --- /dev/null +++ b/vendor/github.com/prometheus/common/model/model.go @@ -0,0 +1,16 @@ +// Copyright 2013 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +// Package model contains common data structures that are shared across +// Prometheus components and libraries. +package model diff --git a/vendor/github.com/prometheus/common/model/signature.go b/vendor/github.com/prometheus/common/model/signature.go new file mode 100644 index 00000000..8762b13c --- /dev/null +++ b/vendor/github.com/prometheus/common/model/signature.go @@ -0,0 +1,144 @@ +// Copyright 2014 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package model + +import ( + "sort" +) + +// SeparatorByte is a byte that cannot occur in valid UTF-8 sequences and is +// used to separate label names, label values, and other strings from each other +// when calculating their combined hash value (aka signature aka fingerprint). +const SeparatorByte byte = 255 + +var ( + // cache the signature of an empty label set. + emptyLabelSignature = hashNew() +) + +// LabelsToSignature returns a quasi-unique signature (i.e., fingerprint) for a +// given label set. (Collisions are possible but unlikely if the number of label +// sets the function is applied to is small.) +func LabelsToSignature(labels map[string]string) uint64 { + if len(labels) == 0 { + return emptyLabelSignature + } + + labelNames := make([]string, 0, len(labels)) + for labelName := range labels { + labelNames = append(labelNames, labelName) + } + sort.Strings(labelNames) + + sum := hashNew() + for _, labelName := range labelNames { + sum = hashAdd(sum, labelName) + sum = hashAddByte(sum, SeparatorByte) + sum = hashAdd(sum, labels[labelName]) + sum = hashAddByte(sum, SeparatorByte) + } + return sum +} + +// labelSetToFingerprint works exactly as LabelsToSignature but takes a LabelSet as +// parameter (rather than a label map) and returns a Fingerprint. +func labelSetToFingerprint(ls LabelSet) Fingerprint { + if len(ls) == 0 { + return Fingerprint(emptyLabelSignature) + } + + labelNames := make(LabelNames, 0, len(ls)) + for labelName := range ls { + labelNames = append(labelNames, labelName) + } + sort.Sort(labelNames) + + sum := hashNew() + for _, labelName := range labelNames { + sum = hashAdd(sum, string(labelName)) + sum = hashAddByte(sum, SeparatorByte) + sum = hashAdd(sum, string(ls[labelName])) + sum = hashAddByte(sum, SeparatorByte) + } + return Fingerprint(sum) +} + +// labelSetToFastFingerprint works similar to labelSetToFingerprint but uses a +// faster and less allocation-heavy hash function, which is more susceptible to +// create hash collisions. Therefore, collision detection should be applied. +func labelSetToFastFingerprint(ls LabelSet) Fingerprint { + if len(ls) == 0 { + return Fingerprint(emptyLabelSignature) + } + + var result uint64 + for labelName, labelValue := range ls { + sum := hashNew() + sum = hashAdd(sum, string(labelName)) + sum = hashAddByte(sum, SeparatorByte) + sum = hashAdd(sum, string(labelValue)) + result ^= sum + } + return Fingerprint(result) +} + +// SignatureForLabels works like LabelsToSignature but takes a Metric as +// parameter (rather than a label map) and only includes the labels with the +// specified LabelNames into the signature calculation. The labels passed in +// will be sorted by this function. +func SignatureForLabels(m Metric, labels ...LabelName) uint64 { + if len(labels) == 0 { + return emptyLabelSignature + } + + sort.Sort(LabelNames(labels)) + + sum := hashNew() + for _, label := range labels { + sum = hashAdd(sum, string(label)) + sum = hashAddByte(sum, SeparatorByte) + sum = hashAdd(sum, string(m[label])) + sum = hashAddByte(sum, SeparatorByte) + } + return sum +} + +// SignatureWithoutLabels works like LabelsToSignature but takes a Metric as +// parameter (rather than a label map) and excludes the labels with any of the +// specified LabelNames from the signature calculation. +func SignatureWithoutLabels(m Metric, labels map[LabelName]struct{}) uint64 { + if len(m) == 0 { + return emptyLabelSignature + } + + labelNames := make(LabelNames, 0, len(m)) + for labelName := range m { + if _, exclude := labels[labelName]; !exclude { + labelNames = append(labelNames, labelName) + } + } + if len(labelNames) == 0 { + return emptyLabelSignature + } + sort.Sort(labelNames) + + sum := hashNew() + for _, labelName := range labelNames { + sum = hashAdd(sum, string(labelName)) + sum = hashAddByte(sum, SeparatorByte) + sum = hashAdd(sum, string(m[labelName])) + sum = hashAddByte(sum, SeparatorByte) + } + return sum +} diff --git a/vendor/github.com/prometheus/common/model/silence.go b/vendor/github.com/prometheus/common/model/silence.go new file mode 100644 index 00000000..bb99889d --- /dev/null +++ b/vendor/github.com/prometheus/common/model/silence.go @@ -0,0 +1,106 @@ +// Copyright 2015 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package model + +import ( + "encoding/json" + "fmt" + "regexp" + "time" +) + +// Matcher describes a matches the value of a given label. +type Matcher struct { + Name LabelName `json:"name"` + Value string `json:"value"` + IsRegex bool `json:"isRegex"` +} + +func (m *Matcher) UnmarshalJSON(b []byte) error { + type plain Matcher + if err := json.Unmarshal(b, (*plain)(m)); err != nil { + return err + } + + if len(m.Name) == 0 { + return fmt.Errorf("label name in matcher must not be empty") + } + if m.IsRegex { + if _, err := regexp.Compile(m.Value); err != nil { + return err + } + } + return nil +} + +// Validate returns true iff all fields of the matcher have valid values. +func (m *Matcher) Validate() error { + if !m.Name.IsValid() { + return fmt.Errorf("invalid name %q", m.Name) + } + if m.IsRegex { + if _, err := regexp.Compile(m.Value); err != nil { + return fmt.Errorf("invalid regular expression %q", m.Value) + } + } else if !LabelValue(m.Value).IsValid() || len(m.Value) == 0 { + return fmt.Errorf("invalid value %q", m.Value) + } + return nil +} + +// Silence defines the representation of a silence definition in the Prometheus +// eco-system. +type Silence struct { + ID uint64 `json:"id,omitempty"` + + Matchers []*Matcher `json:"matchers"` + + StartsAt time.Time `json:"startsAt"` + EndsAt time.Time `json:"endsAt"` + + CreatedAt time.Time `json:"createdAt,omitempty"` + CreatedBy string `json:"createdBy"` + Comment string `json:"comment,omitempty"` +} + +// Validate returns true iff all fields of the silence have valid values. +func (s *Silence) Validate() error { + if len(s.Matchers) == 0 { + return fmt.Errorf("at least one matcher required") + } + for _, m := range s.Matchers { + if err := m.Validate(); err != nil { + return fmt.Errorf("invalid matcher: %s", err) + } + } + if s.StartsAt.IsZero() { + return fmt.Errorf("start time missing") + } + if s.EndsAt.IsZero() { + return fmt.Errorf("end time missing") + } + if s.EndsAt.Before(s.StartsAt) { + return fmt.Errorf("start time must be before end time") + } + if s.CreatedBy == "" { + return fmt.Errorf("creator information missing") + } + if s.Comment == "" { + return fmt.Errorf("comment missing") + } + if s.CreatedAt.IsZero() { + return fmt.Errorf("creation timestamp missing") + } + return nil +} diff --git a/vendor/github.com/prometheus/common/model/time.go b/vendor/github.com/prometheus/common/model/time.go new file mode 100644 index 00000000..490a0240 --- /dev/null +++ b/vendor/github.com/prometheus/common/model/time.go @@ -0,0 +1,274 @@ +// Copyright 2013 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package model + +import ( + "fmt" + "math" + "regexp" + "strconv" + "strings" + "time" +) + +const ( + // MinimumTick is the minimum supported time resolution. This has to be + // at least time.Second in order for the code below to work. + minimumTick = time.Millisecond + // second is the Time duration equivalent to one second. + second = int64(time.Second / minimumTick) + // The number of nanoseconds per minimum tick. + nanosPerTick = int64(minimumTick / time.Nanosecond) + + // Earliest is the earliest Time representable. Handy for + // initializing a high watermark. + Earliest = Time(math.MinInt64) + // Latest is the latest Time representable. Handy for initializing + // a low watermark. + Latest = Time(math.MaxInt64) +) + +// Time is the number of milliseconds since the epoch +// (1970-01-01 00:00 UTC) excluding leap seconds. +type Time int64 + +// Interval describes an interval between two timestamps. +type Interval struct { + Start, End Time +} + +// Now returns the current time as a Time. +func Now() Time { + return TimeFromUnixNano(time.Now().UnixNano()) +} + +// TimeFromUnix returns the Time equivalent to the Unix Time t +// provided in seconds. +func TimeFromUnix(t int64) Time { + return Time(t * second) +} + +// TimeFromUnixNano returns the Time equivalent to the Unix Time +// t provided in nanoseconds. +func TimeFromUnixNano(t int64) Time { + return Time(t / nanosPerTick) +} + +// Equal reports whether two Times represent the same instant. +func (t Time) Equal(o Time) bool { + return t == o +} + +// Before reports whether the Time t is before o. +func (t Time) Before(o Time) bool { + return t < o +} + +// After reports whether the Time t is after o. +func (t Time) After(o Time) bool { + return t > o +} + +// Add returns the Time t + d. +func (t Time) Add(d time.Duration) Time { + return t + Time(d/minimumTick) +} + +// Sub returns the Duration t - o. +func (t Time) Sub(o Time) time.Duration { + return time.Duration(t-o) * minimumTick +} + +// Time returns the time.Time representation of t. +func (t Time) Time() time.Time { + return time.Unix(int64(t)/second, (int64(t)%second)*nanosPerTick) +} + +// Unix returns t as a Unix time, the number of seconds elapsed +// since January 1, 1970 UTC. +func (t Time) Unix() int64 { + return int64(t) / second +} + +// UnixNano returns t as a Unix time, the number of nanoseconds elapsed +// since January 1, 1970 UTC. +func (t Time) UnixNano() int64 { + return int64(t) * nanosPerTick +} + +// The number of digits after the dot. +var dotPrecision = int(math.Log10(float64(second))) + +// String returns a string representation of the Time. +func (t Time) String() string { + return strconv.FormatFloat(float64(t)/float64(second), 'f', -1, 64) +} + +// MarshalJSON implements the json.Marshaler interface. +func (t Time) MarshalJSON() ([]byte, error) { + return []byte(t.String()), nil +} + +// UnmarshalJSON implements the json.Unmarshaler interface. +func (t *Time) UnmarshalJSON(b []byte) error { + p := strings.Split(string(b), ".") + switch len(p) { + case 1: + v, err := strconv.ParseInt(string(p[0]), 10, 64) + if err != nil { + return err + } + *t = Time(v * second) + + case 2: + v, err := strconv.ParseInt(string(p[0]), 10, 64) + if err != nil { + return err + } + v *= second + + prec := dotPrecision - len(p[1]) + if prec < 0 { + p[1] = p[1][:dotPrecision] + } else if prec > 0 { + p[1] = p[1] + strings.Repeat("0", prec) + } + + va, err := strconv.ParseInt(p[1], 10, 32) + if err != nil { + return err + } + + // If the value was something like -0.1 the negative is lost in the + // parsing because of the leading zero, this ensures that we capture it. + if len(p[0]) > 0 && p[0][0] == '-' && v+va > 0 { + *t = Time(v+va) * -1 + } else { + *t = Time(v + va) + } + + default: + return fmt.Errorf("invalid time %q", string(b)) + } + return nil +} + +// Duration wraps time.Duration. It is used to parse the custom duration format +// from YAML. +// This type should not propagate beyond the scope of input/output processing. +type Duration time.Duration + +// Set implements pflag/flag.Value +func (d *Duration) Set(s string) error { + var err error + *d, err = ParseDuration(s) + return err +} + +// Type implements pflag.Value +func (d *Duration) Type() string { + return "duration" +} + +var durationRE = regexp.MustCompile("^([0-9]+)(y|w|d|h|m|s|ms)$") + +// ParseDuration parses a string into a time.Duration, assuming that a year +// always has 365d, a week always has 7d, and a day always has 24h. +func ParseDuration(durationStr string) (Duration, error) { + // Allow 0 without a unit. + if durationStr == "0" { + return 0, nil + } + matches := durationRE.FindStringSubmatch(durationStr) + if len(matches) != 3 { + return 0, fmt.Errorf("not a valid duration string: %q", durationStr) + } + var ( + n, _ = strconv.Atoi(matches[1]) + dur = time.Duration(n) * time.Millisecond + ) + switch unit := matches[2]; unit { + case "y": + dur *= 1000 * 60 * 60 * 24 * 365 + case "w": + dur *= 1000 * 60 * 60 * 24 * 7 + case "d": + dur *= 1000 * 60 * 60 * 24 + case "h": + dur *= 1000 * 60 * 60 + case "m": + dur *= 1000 * 60 + case "s": + dur *= 1000 + case "ms": + // Value already correct + default: + return 0, fmt.Errorf("invalid time unit in duration string: %q", unit) + } + return Duration(dur), nil +} + +func (d Duration) String() string { + var ( + ms = int64(time.Duration(d) / time.Millisecond) + unit = "ms" + ) + if ms == 0 { + return "0s" + } + factors := map[string]int64{ + "y": 1000 * 60 * 60 * 24 * 365, + "w": 1000 * 60 * 60 * 24 * 7, + "d": 1000 * 60 * 60 * 24, + "h": 1000 * 60 * 60, + "m": 1000 * 60, + "s": 1000, + "ms": 1, + } + + switch int64(0) { + case ms % factors["y"]: + unit = "y" + case ms % factors["w"]: + unit = "w" + case ms % factors["d"]: + unit = "d" + case ms % factors["h"]: + unit = "h" + case ms % factors["m"]: + unit = "m" + case ms % factors["s"]: + unit = "s" + } + return fmt.Sprintf("%v%v", ms/factors[unit], unit) +} + +// MarshalYAML implements the yaml.Marshaler interface. +func (d Duration) MarshalYAML() (interface{}, error) { + return d.String(), nil +} + +// UnmarshalYAML implements the yaml.Unmarshaler interface. +func (d *Duration) UnmarshalYAML(unmarshal func(interface{}) error) error { + var s string + if err := unmarshal(&s); err != nil { + return err + } + dur, err := ParseDuration(s) + if err != nil { + return err + } + *d = dur + return nil +} diff --git a/vendor/github.com/prometheus/common/model/value.go b/vendor/github.com/prometheus/common/model/value.go new file mode 100644 index 00000000..c9d8fb1a --- /dev/null +++ b/vendor/github.com/prometheus/common/model/value.go @@ -0,0 +1,416 @@ +// Copyright 2013 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package model + +import ( + "encoding/json" + "fmt" + "math" + "sort" + "strconv" + "strings" +) + +var ( + // ZeroSamplePair is the pseudo zero-value of SamplePair used to signal a + // non-existing sample pair. It is a SamplePair with timestamp Earliest and + // value 0.0. Note that the natural zero value of SamplePair has a timestamp + // of 0, which is possible to appear in a real SamplePair and thus not + // suitable to signal a non-existing SamplePair. + ZeroSamplePair = SamplePair{Timestamp: Earliest} + + // ZeroSample is the pseudo zero-value of Sample used to signal a + // non-existing sample. It is a Sample with timestamp Earliest, value 0.0, + // and metric nil. Note that the natural zero value of Sample has a timestamp + // of 0, which is possible to appear in a real Sample and thus not suitable + // to signal a non-existing Sample. + ZeroSample = Sample{Timestamp: Earliest} +) + +// A SampleValue is a representation of a value for a given sample at a given +// time. +type SampleValue float64 + +// MarshalJSON implements json.Marshaler. +func (v SampleValue) MarshalJSON() ([]byte, error) { + return json.Marshal(v.String()) +} + +// UnmarshalJSON implements json.Unmarshaler. +func (v *SampleValue) UnmarshalJSON(b []byte) error { + if len(b) < 2 || b[0] != '"' || b[len(b)-1] != '"' { + return fmt.Errorf("sample value must be a quoted string") + } + f, err := strconv.ParseFloat(string(b[1:len(b)-1]), 64) + if err != nil { + return err + } + *v = SampleValue(f) + return nil +} + +// Equal returns true if the value of v and o is equal or if both are NaN. Note +// that v==o is false if both are NaN. If you want the conventional float +// behavior, use == to compare two SampleValues. +func (v SampleValue) Equal(o SampleValue) bool { + if v == o { + return true + } + return math.IsNaN(float64(v)) && math.IsNaN(float64(o)) +} + +func (v SampleValue) String() string { + return strconv.FormatFloat(float64(v), 'f', -1, 64) +} + +// SamplePair pairs a SampleValue with a Timestamp. +type SamplePair struct { + Timestamp Time + Value SampleValue +} + +// MarshalJSON implements json.Marshaler. +func (s SamplePair) MarshalJSON() ([]byte, error) { + t, err := json.Marshal(s.Timestamp) + if err != nil { + return nil, err + } + v, err := json.Marshal(s.Value) + if err != nil { + return nil, err + } + return []byte(fmt.Sprintf("[%s,%s]", t, v)), nil +} + +// UnmarshalJSON implements json.Unmarshaler. +func (s *SamplePair) UnmarshalJSON(b []byte) error { + v := [...]json.Unmarshaler{&s.Timestamp, &s.Value} + return json.Unmarshal(b, &v) +} + +// Equal returns true if this SamplePair and o have equal Values and equal +// Timestamps. The semantics of Value equality is defined by SampleValue.Equal. +func (s *SamplePair) Equal(o *SamplePair) bool { + return s == o || (s.Value.Equal(o.Value) && s.Timestamp.Equal(o.Timestamp)) +} + +func (s SamplePair) String() string { + return fmt.Sprintf("%s @[%s]", s.Value, s.Timestamp) +} + +// Sample is a sample pair associated with a metric. +type Sample struct { + Metric Metric `json:"metric"` + Value SampleValue `json:"value"` + Timestamp Time `json:"timestamp"` +} + +// Equal compares first the metrics, then the timestamp, then the value. The +// semantics of value equality is defined by SampleValue.Equal. +func (s *Sample) Equal(o *Sample) bool { + if s == o { + return true + } + + if !s.Metric.Equal(o.Metric) { + return false + } + if !s.Timestamp.Equal(o.Timestamp) { + return false + } + + return s.Value.Equal(o.Value) +} + +func (s Sample) String() string { + return fmt.Sprintf("%s => %s", s.Metric, SamplePair{ + Timestamp: s.Timestamp, + Value: s.Value, + }) +} + +// MarshalJSON implements json.Marshaler. +func (s Sample) MarshalJSON() ([]byte, error) { + v := struct { + Metric Metric `json:"metric"` + Value SamplePair `json:"value"` + }{ + Metric: s.Metric, + Value: SamplePair{ + Timestamp: s.Timestamp, + Value: s.Value, + }, + } + + return json.Marshal(&v) +} + +// UnmarshalJSON implements json.Unmarshaler. +func (s *Sample) UnmarshalJSON(b []byte) error { + v := struct { + Metric Metric `json:"metric"` + Value SamplePair `json:"value"` + }{ + Metric: s.Metric, + Value: SamplePair{ + Timestamp: s.Timestamp, + Value: s.Value, + }, + } + + if err := json.Unmarshal(b, &v); err != nil { + return err + } + + s.Metric = v.Metric + s.Timestamp = v.Value.Timestamp + s.Value = v.Value.Value + + return nil +} + +// Samples is a sortable Sample slice. It implements sort.Interface. +type Samples []*Sample + +func (s Samples) Len() int { + return len(s) +} + +// Less compares first the metrics, then the timestamp. +func (s Samples) Less(i, j int) bool { + switch { + case s[i].Metric.Before(s[j].Metric): + return true + case s[j].Metric.Before(s[i].Metric): + return false + case s[i].Timestamp.Before(s[j].Timestamp): + return true + default: + return false + } +} + +func (s Samples) Swap(i, j int) { + s[i], s[j] = s[j], s[i] +} + +// Equal compares two sets of samples and returns true if they are equal. +func (s Samples) Equal(o Samples) bool { + if len(s) != len(o) { + return false + } + + for i, sample := range s { + if !sample.Equal(o[i]) { + return false + } + } + return true +} + +// SampleStream is a stream of Values belonging to an attached COWMetric. +type SampleStream struct { + Metric Metric `json:"metric"` + Values []SamplePair `json:"values"` +} + +func (ss SampleStream) String() string { + vals := make([]string, len(ss.Values)) + for i, v := range ss.Values { + vals[i] = v.String() + } + return fmt.Sprintf("%s =>\n%s", ss.Metric, strings.Join(vals, "\n")) +} + +// Value is a generic interface for values resulting from a query evaluation. +type Value interface { + Type() ValueType + String() string +} + +func (Matrix) Type() ValueType { return ValMatrix } +func (Vector) Type() ValueType { return ValVector } +func (*Scalar) Type() ValueType { return ValScalar } +func (*String) Type() ValueType { return ValString } + +type ValueType int + +const ( + ValNone ValueType = iota + ValScalar + ValVector + ValMatrix + ValString +) + +// MarshalJSON implements json.Marshaler. +func (et ValueType) MarshalJSON() ([]byte, error) { + return json.Marshal(et.String()) +} + +func (et *ValueType) UnmarshalJSON(b []byte) error { + var s string + if err := json.Unmarshal(b, &s); err != nil { + return err + } + switch s { + case "": + *et = ValNone + case "scalar": + *et = ValScalar + case "vector": + *et = ValVector + case "matrix": + *et = ValMatrix + case "string": + *et = ValString + default: + return fmt.Errorf("unknown value type %q", s) + } + return nil +} + +func (e ValueType) String() string { + switch e { + case ValNone: + return "" + case ValScalar: + return "scalar" + case ValVector: + return "vector" + case ValMatrix: + return "matrix" + case ValString: + return "string" + } + panic("ValueType.String: unhandled value type") +} + +// Scalar is a scalar value evaluated at the set timestamp. +type Scalar struct { + Value SampleValue `json:"value"` + Timestamp Time `json:"timestamp"` +} + +func (s Scalar) String() string { + return fmt.Sprintf("scalar: %v @[%v]", s.Value, s.Timestamp) +} + +// MarshalJSON implements json.Marshaler. +func (s Scalar) MarshalJSON() ([]byte, error) { + v := strconv.FormatFloat(float64(s.Value), 'f', -1, 64) + return json.Marshal([...]interface{}{s.Timestamp, string(v)}) +} + +// UnmarshalJSON implements json.Unmarshaler. +func (s *Scalar) UnmarshalJSON(b []byte) error { + var f string + v := [...]interface{}{&s.Timestamp, &f} + + if err := json.Unmarshal(b, &v); err != nil { + return err + } + + value, err := strconv.ParseFloat(f, 64) + if err != nil { + return fmt.Errorf("error parsing sample value: %s", err) + } + s.Value = SampleValue(value) + return nil +} + +// String is a string value evaluated at the set timestamp. +type String struct { + Value string `json:"value"` + Timestamp Time `json:"timestamp"` +} + +func (s *String) String() string { + return s.Value +} + +// MarshalJSON implements json.Marshaler. +func (s String) MarshalJSON() ([]byte, error) { + return json.Marshal([]interface{}{s.Timestamp, s.Value}) +} + +// UnmarshalJSON implements json.Unmarshaler. +func (s *String) UnmarshalJSON(b []byte) error { + v := [...]interface{}{&s.Timestamp, &s.Value} + return json.Unmarshal(b, &v) +} + +// Vector is basically only an alias for Samples, but the +// contract is that in a Vector, all Samples have the same timestamp. +type Vector []*Sample + +func (vec Vector) String() string { + entries := make([]string, len(vec)) + for i, s := range vec { + entries[i] = s.String() + } + return strings.Join(entries, "\n") +} + +func (vec Vector) Len() int { return len(vec) } +func (vec Vector) Swap(i, j int) { vec[i], vec[j] = vec[j], vec[i] } + +// Less compares first the metrics, then the timestamp. +func (vec Vector) Less(i, j int) bool { + switch { + case vec[i].Metric.Before(vec[j].Metric): + return true + case vec[j].Metric.Before(vec[i].Metric): + return false + case vec[i].Timestamp.Before(vec[j].Timestamp): + return true + default: + return false + } +} + +// Equal compares two sets of samples and returns true if they are equal. +func (vec Vector) Equal(o Vector) bool { + if len(vec) != len(o) { + return false + } + + for i, sample := range vec { + if !sample.Equal(o[i]) { + return false + } + } + return true +} + +// Matrix is a list of time series. +type Matrix []*SampleStream + +func (m Matrix) Len() int { return len(m) } +func (m Matrix) Less(i, j int) bool { return m[i].Metric.Before(m[j].Metric) } +func (m Matrix) Swap(i, j int) { m[i], m[j] = m[j], m[i] } + +func (mat Matrix) String() string { + matCp := make(Matrix, len(mat)) + copy(matCp, mat) + sort.Sort(matCp) + + strs := make([]string, len(matCp)) + + for i, ss := range matCp { + strs[i] = ss.String() + } + + return strings.Join(strs, "\n") +} diff --git a/vendor/github.com/prometheus/procfs/.gitignore b/vendor/github.com/prometheus/procfs/.gitignore new file mode 100644 index 00000000..25e3659a --- /dev/null +++ b/vendor/github.com/prometheus/procfs/.gitignore @@ -0,0 +1 @@ +/fixtures/ diff --git a/vendor/github.com/prometheus/procfs/.golangci.yml b/vendor/github.com/prometheus/procfs/.golangci.yml new file mode 100644 index 00000000..0aa09eda --- /dev/null +++ b/vendor/github.com/prometheus/procfs/.golangci.yml @@ -0,0 +1,4 @@ +--- +linters: + enable: + - golint diff --git a/vendor/github.com/prometheus/procfs/CODE_OF_CONDUCT.md b/vendor/github.com/prometheus/procfs/CODE_OF_CONDUCT.md new file mode 100644 index 00000000..9a1aff41 --- /dev/null +++ b/vendor/github.com/prometheus/procfs/CODE_OF_CONDUCT.md @@ -0,0 +1,3 @@ +## Prometheus Community Code of Conduct + +Prometheus follows the [CNCF Code of Conduct](https://github.com/cncf/foundation/blob/master/code-of-conduct.md). diff --git a/vendor/github.com/prometheus/procfs/CONTRIBUTING.md b/vendor/github.com/prometheus/procfs/CONTRIBUTING.md new file mode 100644 index 00000000..943de761 --- /dev/null +++ b/vendor/github.com/prometheus/procfs/CONTRIBUTING.md @@ -0,0 +1,121 @@ +# Contributing + +Prometheus uses GitHub to manage reviews of pull requests. + +* If you are a new contributor see: [Steps to Contribute](#steps-to-contribute) + +* If you have a trivial fix or improvement, go ahead and create a pull request, + addressing (with `@...`) a suitable maintainer of this repository (see + [MAINTAINERS.md](MAINTAINERS.md)) in the description of the pull request. + +* If you plan to do something more involved, first discuss your ideas + on our [mailing list](https://groups.google.com/forum/?fromgroups#!forum/prometheus-developers). + This will avoid unnecessary work and surely give you and us a good deal + of inspiration. Also please see our [non-goals issue](https://github.com/prometheus/docs/issues/149) on areas that the Prometheus community doesn't plan to work on. + +* Relevant coding style guidelines are the [Go Code Review + Comments](https://code.google.com/p/go-wiki/wiki/CodeReviewComments) + and the _Formatting and style_ section of Peter Bourgon's [Go: Best + Practices for Production + Environments](https://peter.bourgon.org/go-in-production/#formatting-and-style). + +* Be sure to sign off on the [DCO](https://github.com/probot/dco#how-it-works) + +## Steps to Contribute + +Should you wish to work on an issue, please claim it first by commenting on the GitHub issue that you want to work on it. This is to prevent duplicated efforts from contributors on the same issue. + +Please check the [`help-wanted`](https://github.com/prometheus/procfs/issues?q=is%3Aissue+is%3Aopen+label%3A%22help+wanted%22) label to find issues that are good for getting started. If you have questions about one of the issues, with or without the tag, please comment on them and one of the maintainers will clarify it. For a quicker response, contact us over [IRC](https://prometheus.io/community). + +For quickly compiling and testing your changes do: +``` +make test # Make sure all the tests pass before you commit and push :) +``` + +We use [`golangci-lint`](https://github.com/golangci/golangci-lint) for linting the code. If it reports an issue and you think that the warning needs to be disregarded or is a false-positive, you can add a special comment `//nolint:linter1[,linter2,...]` before the offending line. Use this sparingly though, fixing the code to comply with the linter's recommendation is in general the preferred course of action. + +## Pull Request Checklist + +* Branch from the master branch and, if needed, rebase to the current master branch before submitting your pull request. If it doesn't merge cleanly with master you may be asked to rebase your changes. + +* Commits should be as small as possible, while ensuring that each commit is correct independently (i.e., each commit should compile and pass tests). + +* If your patch is not getting reviewed or you need a specific person to review it, you can @-reply a reviewer asking for a review in the pull request or a comment, or you can ask for a review on IRC channel [#prometheus](https://webchat.freenode.net/?channels=#prometheus) on irc.freenode.net (for the easiest start, [join via Riot](https://riot.im/app/#/room/#prometheus:matrix.org)). + +* Add tests relevant to the fixed bug or new feature. + +## Dependency management + +The Prometheus project uses [Go modules](https://golang.org/cmd/go/#hdr-Modules__module_versions__and_more) to manage dependencies on external packages. This requires a working Go environment with version 1.12 or greater installed. + +All dependencies are vendored in the `vendor/` directory. + +To add or update a new dependency, use the `go get` command: + +```bash +# Pick the latest tagged release. +go get example.com/some/module/pkg + +# Pick a specific version. +go get example.com/some/module/pkg@vX.Y.Z +``` + +Tidy up the `go.mod` and `go.sum` files and copy the new/updated dependency to the `vendor/` directory: + + +```bash +# The GO111MODULE variable can be omitted when the code isn't located in GOPATH. +GO111MODULE=on go mod tidy + +GO111MODULE=on go mod vendor +``` + +You have to commit the changes to `go.mod`, `go.sum` and the `vendor/` directory before submitting the pull request. + + +## API Implementation Guidelines + +### Naming and Documentation + +Public functions and structs should normally be named according to the file(s) being read and parsed. For example, +the `fs.BuddyInfo()` function reads the file `/proc/buddyinfo`. In addition, the godoc for each public function +should contain the path to the file(s) being read and a URL of the linux kernel documentation describing the file(s). + +### Reading vs. Parsing + +Most functionality in this library consists of reading files and then parsing the text into structured data. In most +cases reading and parsing should be separated into different functions/methods with a public `fs.Thing()` method and +a private `parseThing(r Reader)` function. This provides a logical separation and allows parsing to be tested +directly without the need to read from the filesystem. Using a `Reader` argument is preferred over other data types +such as `string` or `*File` because it provides the most flexibility regarding the data source. When a set of files +in a directory needs to be parsed, then a `path` string parameter to the parse function can be used instead. + +### /proc and /sys filesystem I/O + +The `proc` and `sys` filesystems are pseudo file systems and work a bit differently from standard disk I/O. +Many of the files are changing continuously and the data being read can in some cases change between subsequent +reads in the same file. Also, most of the files are relatively small (less than a few KBs), and system calls +to the `stat` function will often return the wrong size. Therefore, for most files it's recommended to read the +full file in a single operation using an internal utility function called `util.ReadFileNoStat`. +This function is similar to `ioutil.ReadFile`, but it avoids the system call to `stat` to get the current size of +the file. + +Note that parsing the file's contents can still be performed one line at a time. This is done by first reading +the full file, and then using a scanner on the `[]byte` or `string` containing the data. + +``` + data, err := util.ReadFileNoStat("/proc/cpuinfo") + if err != nil { + return err + } + reader := bytes.NewReader(data) + scanner := bufio.NewScanner(reader) +``` + +The `/sys` filesystem contains many very small files which contain only a single numeric or text value. These files +can be read using an internal function called `util.SysReadFile` which is similar to `ioutil.ReadFile` but does +not bother to check the size of the file before reading. +``` + data, err := util.SysReadFile("/sys/class/power_supply/BAT0/capacity") +``` + diff --git a/vendor/github.com/prometheus/procfs/LICENSE b/vendor/github.com/prometheus/procfs/LICENSE new file mode 100644 index 00000000..261eeb9e --- /dev/null +++ b/vendor/github.com/prometheus/procfs/LICENSE @@ -0,0 +1,201 @@ + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + + TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + + 1. 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In no event and under no legal theory, + whether in tort (including negligence), contract, or otherwise, + unless required by applicable law (such as deliberate and grossly + negligent acts) or agreed to in writing, shall any Contributor be + liable to You for damages, including any direct, indirect, special, + incidental, or consequential damages of any character arising as a + result of this License or out of the use or inability to use the + Work (including but not limited to damages for loss of goodwill, + work stoppage, computer failure or malfunction, or any and all + other commercial damages or losses), even if such Contributor + has been advised of the possibility of such damages. + + 9. Accepting Warranty or Additional Liability. While redistributing + the Work or Derivative Works thereof, You may choose to offer, + and charge a fee for, acceptance of support, warranty, indemnity, + or other liability obligations and/or rights consistent with this + License. However, in accepting such obligations, You may act only + on Your own behalf and on Your sole responsibility, not on behalf + of any other Contributor, and only if You agree to indemnify, + defend, and hold each Contributor harmless for any liability + incurred by, or claims asserted against, such Contributor by reason + of your accepting any such warranty or additional liability. + + END OF TERMS AND CONDITIONS + + APPENDIX: How to apply the Apache License to your work. + + To apply the Apache License to your work, attach the following + boilerplate notice, with the fields enclosed by brackets "[]" + replaced with your own identifying information. (Don't include + the brackets!) The text should be enclosed in the appropriate + comment syntax for the file format. We also recommend that a + file or class name and description of purpose be included on the + same "printed page" as the copyright notice for easier + identification within third-party archives. + + Copyright [yyyy] [name of copyright owner] + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. diff --git a/vendor/github.com/prometheus/procfs/MAINTAINERS.md b/vendor/github.com/prometheus/procfs/MAINTAINERS.md new file mode 100644 index 00000000..56ba67d3 --- /dev/null +++ b/vendor/github.com/prometheus/procfs/MAINTAINERS.md @@ -0,0 +1,2 @@ +* Johannes 'fish' Ziemke @discordianfish +* Paul Gier @pgier diff --git a/vendor/github.com/prometheus/procfs/Makefile b/vendor/github.com/prometheus/procfs/Makefile new file mode 100644 index 00000000..616a0d25 --- /dev/null +++ b/vendor/github.com/prometheus/procfs/Makefile @@ -0,0 +1,29 @@ +# Copyright 2018 The Prometheus Authors +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. + +include Makefile.common + +%/.unpacked: %.ttar + @echo ">> extracting fixtures" + ./ttar -C $(dir $*) -x -f $*.ttar + touch $@ + +update_fixtures: + rm -vf fixtures/.unpacked + ./ttar -c -f fixtures.ttar fixtures/ + +.PHONY: build +build: + +.PHONY: test +test: fixtures/.unpacked common-test diff --git a/vendor/github.com/prometheus/procfs/Makefile.common b/vendor/github.com/prometheus/procfs/Makefile.common new file mode 100644 index 00000000..3ac29c63 --- /dev/null +++ b/vendor/github.com/prometheus/procfs/Makefile.common @@ -0,0 +1,302 @@ +# Copyright 2018 The Prometheus Authors +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. + + +# A common Makefile that includes rules to be reused in different prometheus projects. +# !!! Open PRs only against the prometheus/prometheus/Makefile.common repository! + +# Example usage : +# Create the main Makefile in the root project directory. +# include Makefile.common +# customTarget: +# @echo ">> Running customTarget" +# + +# Ensure GOBIN is not set during build so that promu is installed to the correct path +unexport GOBIN + +GO ?= go +GOFMT ?= $(GO)fmt +FIRST_GOPATH := $(firstword $(subst :, ,$(shell $(GO) env GOPATH))) +GOOPTS ?= +GOHOSTOS ?= $(shell $(GO) env GOHOSTOS) +GOHOSTARCH ?= $(shell $(GO) env GOHOSTARCH) + +GO_VERSION ?= $(shell $(GO) version) +GO_VERSION_NUMBER ?= $(word 3, $(GO_VERSION)) +PRE_GO_111 ?= $(shell echo $(GO_VERSION_NUMBER) | grep -E 'go1\.(10|[0-9])\.') + +GOVENDOR := +GO111MODULE := +ifeq (, $(PRE_GO_111)) + ifneq (,$(wildcard go.mod)) + # Enforce Go modules support just in case the directory is inside GOPATH (and for Travis CI). + GO111MODULE := on + + ifneq (,$(wildcard vendor)) + # Always use the local vendor/ directory to satisfy the dependencies. + GOOPTS := $(GOOPTS) -mod=vendor + endif + endif +else + ifneq (,$(wildcard go.mod)) + ifneq (,$(wildcard vendor)) +$(warning This repository requires Go >= 1.11 because of Go modules) +$(warning Some recipes may not work as expected as the current Go runtime is '$(GO_VERSION_NUMBER)') + endif + else + # This repository isn't using Go modules (yet). + GOVENDOR := $(FIRST_GOPATH)/bin/govendor + endif +endif +PROMU := $(FIRST_GOPATH)/bin/promu +pkgs = ./... + +ifeq (arm, $(GOHOSTARCH)) + GOHOSTARM ?= $(shell GOARM= $(GO) env GOARM) + GO_BUILD_PLATFORM ?= $(GOHOSTOS)-$(GOHOSTARCH)v$(GOHOSTARM) +else + GO_BUILD_PLATFORM ?= $(GOHOSTOS)-$(GOHOSTARCH) +endif + +GOTEST := $(GO) test +GOTEST_DIR := +ifneq ($(CIRCLE_JOB),) +ifneq ($(shell which gotestsum),) + GOTEST_DIR := test-results + GOTEST := gotestsum --junitfile $(GOTEST_DIR)/unit-tests.xml -- +endif +endif + +PROMU_VERSION ?= 0.7.0 +PROMU_URL := https://github.com/prometheus/promu/releases/download/v$(PROMU_VERSION)/promu-$(PROMU_VERSION).$(GO_BUILD_PLATFORM).tar.gz + +GOLANGCI_LINT := +GOLANGCI_LINT_OPTS ?= +GOLANGCI_LINT_VERSION ?= v1.18.0 +# golangci-lint only supports linux, darwin and windows platforms on i386/amd64. +# windows isn't included here because of the path separator being different. +ifeq ($(GOHOSTOS),$(filter $(GOHOSTOS),linux darwin)) + ifeq ($(GOHOSTARCH),$(filter $(GOHOSTARCH),amd64 i386)) + GOLANGCI_LINT := $(FIRST_GOPATH)/bin/golangci-lint + endif +endif + +PREFIX ?= $(shell pwd) +BIN_DIR ?= $(shell pwd) +DOCKER_IMAGE_TAG ?= $(subst /,-,$(shell git rev-parse --abbrev-ref HEAD)) +DOCKERFILE_PATH ?= ./Dockerfile +DOCKERBUILD_CONTEXT ?= ./ +DOCKER_REPO ?= prom + +DOCKER_ARCHS ?= amd64 + +BUILD_DOCKER_ARCHS = $(addprefix common-docker-,$(DOCKER_ARCHS)) +PUBLISH_DOCKER_ARCHS = $(addprefix common-docker-publish-,$(DOCKER_ARCHS)) +TAG_DOCKER_ARCHS = $(addprefix common-docker-tag-latest-,$(DOCKER_ARCHS)) + +ifeq ($(GOHOSTARCH),amd64) + ifeq ($(GOHOSTOS),$(filter $(GOHOSTOS),linux freebsd darwin windows)) + # Only supported on amd64 + test-flags := -race + endif +endif + +# This rule is used to forward a target like "build" to "common-build". This +# allows a new "build" target to be defined in a Makefile which includes this +# one and override "common-build" without override warnings. +%: common-% ; + +.PHONY: common-all +common-all: precheck style check_license lint unused build test + +.PHONY: common-style +common-style: + @echo ">> checking code style" + @fmtRes=$$($(GOFMT) -d $$(find . -path ./vendor -prune -o -name '*.go' -print)); \ + if [ -n "$${fmtRes}" ]; then \ + echo "gofmt checking failed!"; echo "$${fmtRes}"; echo; \ + echo "Please ensure you are using $$($(GO) version) for formatting code."; \ + exit 1; \ + fi + +.PHONY: common-check_license +common-check_license: + @echo ">> checking license header" + @licRes=$$(for file in $$(find . -type f -iname '*.go' ! -path './vendor/*') ; do \ + awk 'NR<=3' $$file | grep -Eq "(Copyright|generated|GENERATED)" || echo $$file; \ + done); \ + if [ -n "$${licRes}" ]; then \ + echo "license header checking failed:"; echo "$${licRes}"; \ + exit 1; \ + fi + +.PHONY: common-deps +common-deps: + @echo ">> getting dependencies" +ifdef GO111MODULE + GO111MODULE=$(GO111MODULE) $(GO) mod download +else + $(GO) get $(GOOPTS) -t ./... +endif + +.PHONY: update-go-deps +update-go-deps: + @echo ">> updating Go dependencies" + @for m in $$($(GO) list -mod=readonly -m -f '{{ if and (not .Indirect) (not .Main)}}{{.Path}}{{end}}' all); do \ + $(GO) get $$m; \ + done + GO111MODULE=$(GO111MODULE) $(GO) mod tidy +ifneq (,$(wildcard vendor)) + GO111MODULE=$(GO111MODULE) $(GO) mod vendor +endif + +.PHONY: common-test-short +common-test-short: $(GOTEST_DIR) + @echo ">> running short tests" + GO111MODULE=$(GO111MODULE) $(GOTEST) -short $(GOOPTS) $(pkgs) + +.PHONY: common-test +common-test: $(GOTEST_DIR) + @echo ">> running all tests" + GO111MODULE=$(GO111MODULE) $(GOTEST) $(test-flags) $(GOOPTS) $(pkgs) + +$(GOTEST_DIR): + @mkdir -p $@ + +.PHONY: common-format +common-format: + @echo ">> formatting code" + GO111MODULE=$(GO111MODULE) $(GO) fmt $(pkgs) + +.PHONY: common-vet +common-vet: + @echo ">> vetting code" + GO111MODULE=$(GO111MODULE) $(GO) vet $(GOOPTS) $(pkgs) + +.PHONY: common-lint +common-lint: $(GOLANGCI_LINT) +ifdef GOLANGCI_LINT + @echo ">> running golangci-lint" +ifdef GO111MODULE +# 'go list' needs to be executed before staticcheck to prepopulate the modules cache. +# Otherwise staticcheck might fail randomly for some reason not yet explained. + GO111MODULE=$(GO111MODULE) $(GO) list -e -compiled -test=true -export=false -deps=true -find=false -tags= -- ./... > /dev/null + GO111MODULE=$(GO111MODULE) $(GOLANGCI_LINT) run $(GOLANGCI_LINT_OPTS) $(pkgs) +else + $(GOLANGCI_LINT) run $(pkgs) +endif +endif + +# For backward-compatibility. +.PHONY: common-staticcheck +common-staticcheck: lint + +.PHONY: common-unused +common-unused: $(GOVENDOR) +ifdef GOVENDOR + @echo ">> running check for unused packages" + @$(GOVENDOR) list +unused | grep . && exit 1 || echo 'No unused packages' +else +ifdef GO111MODULE + @echo ">> running check for unused/missing packages in go.mod" + GO111MODULE=$(GO111MODULE) $(GO) mod tidy +ifeq (,$(wildcard vendor)) + @git diff --exit-code -- go.sum go.mod +else + @echo ">> running check for unused packages in vendor/" + GO111MODULE=$(GO111MODULE) $(GO) mod vendor + @git diff --exit-code -- go.sum go.mod vendor/ +endif +endif +endif + +.PHONY: common-build +common-build: promu + @echo ">> building binaries" + GO111MODULE=$(GO111MODULE) $(PROMU) build --prefix $(PREFIX) $(PROMU_BINARIES) + +.PHONY: common-tarball +common-tarball: promu + @echo ">> building release tarball" + $(PROMU) tarball --prefix $(PREFIX) $(BIN_DIR) + +.PHONY: common-docker $(BUILD_DOCKER_ARCHS) +common-docker: $(BUILD_DOCKER_ARCHS) +$(BUILD_DOCKER_ARCHS): common-docker-%: + docker build -t "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)-linux-$*:$(DOCKER_IMAGE_TAG)" \ + -f $(DOCKERFILE_PATH) \ + --build-arg ARCH="$*" \ + --build-arg OS="linux" \ + $(DOCKERBUILD_CONTEXT) + +.PHONY: common-docker-publish $(PUBLISH_DOCKER_ARCHS) +common-docker-publish: $(PUBLISH_DOCKER_ARCHS) +$(PUBLISH_DOCKER_ARCHS): common-docker-publish-%: + docker push "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)-linux-$*:$(DOCKER_IMAGE_TAG)" + +DOCKER_MAJOR_VERSION_TAG = $(firstword $(subst ., ,$(shell cat VERSION))) +.PHONY: common-docker-tag-latest $(TAG_DOCKER_ARCHS) +common-docker-tag-latest: $(TAG_DOCKER_ARCHS) +$(TAG_DOCKER_ARCHS): common-docker-tag-latest-%: + docker tag "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)-linux-$*:$(DOCKER_IMAGE_TAG)" "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)-linux-$*:latest" + docker tag "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)-linux-$*:$(DOCKER_IMAGE_TAG)" "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)-linux-$*:v$(DOCKER_MAJOR_VERSION_TAG)" + +.PHONY: common-docker-manifest +common-docker-manifest: + DOCKER_CLI_EXPERIMENTAL=enabled docker manifest create -a "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME):$(DOCKER_IMAGE_TAG)" $(foreach ARCH,$(DOCKER_ARCHS),$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)-linux-$(ARCH):$(DOCKER_IMAGE_TAG)) + DOCKER_CLI_EXPERIMENTAL=enabled docker manifest push "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME):$(DOCKER_IMAGE_TAG)" + +.PHONY: promu +promu: $(PROMU) + +$(PROMU): + $(eval PROMU_TMP := $(shell mktemp -d)) + curl -s -L $(PROMU_URL) | tar -xvzf - -C $(PROMU_TMP) + mkdir -p $(FIRST_GOPATH)/bin + cp $(PROMU_TMP)/promu-$(PROMU_VERSION).$(GO_BUILD_PLATFORM)/promu $(FIRST_GOPATH)/bin/promu + rm -r $(PROMU_TMP) + +.PHONY: proto +proto: + @echo ">> generating code from proto files" + @./scripts/genproto.sh + +ifdef GOLANGCI_LINT +$(GOLANGCI_LINT): + mkdir -p $(FIRST_GOPATH)/bin + curl -sfL https://raw.githubusercontent.com/golangci/golangci-lint/$(GOLANGCI_LINT_VERSION)/install.sh \ + | sed -e '/install -d/d' \ + | sh -s -- -b $(FIRST_GOPATH)/bin $(GOLANGCI_LINT_VERSION) +endif + +ifdef GOVENDOR +.PHONY: $(GOVENDOR) +$(GOVENDOR): + GOOS= GOARCH= $(GO) get -u github.com/kardianos/govendor +endif + +.PHONY: precheck +precheck:: + +define PRECHECK_COMMAND_template = +precheck:: $(1)_precheck + +PRECHECK_COMMAND_$(1) ?= $(1) $$(strip $$(PRECHECK_OPTIONS_$(1))) +.PHONY: $(1)_precheck +$(1)_precheck: + @if ! $$(PRECHECK_COMMAND_$(1)) 1>/dev/null 2>&1; then \ + echo "Execution of '$$(PRECHECK_COMMAND_$(1))' command failed. Is $(1) installed?"; \ + exit 1; \ + fi +endef diff --git a/vendor/github.com/prometheus/procfs/NOTICE b/vendor/github.com/prometheus/procfs/NOTICE new file mode 100644 index 00000000..53c5e9aa --- /dev/null +++ b/vendor/github.com/prometheus/procfs/NOTICE @@ -0,0 +1,7 @@ +procfs provides functions to retrieve system, kernel and process +metrics from the pseudo-filesystem proc. + +Copyright 2014-2015 The Prometheus Authors + +This product includes software developed at +SoundCloud Ltd. (http://soundcloud.com/). diff --git a/vendor/github.com/prometheus/procfs/README.md b/vendor/github.com/prometheus/procfs/README.md new file mode 100644 index 00000000..55d1e326 --- /dev/null +++ b/vendor/github.com/prometheus/procfs/README.md @@ -0,0 +1,61 @@ +# procfs + +This package provides functions to retrieve system, kernel, and process +metrics from the pseudo-filesystems /proc and /sys. + +*WARNING*: This package is a work in progress. Its API may still break in +backwards-incompatible ways without warnings. Use it at your own risk. + +[![GoDoc](https://godoc.org/github.com/prometheus/procfs?status.png)](https://godoc.org/github.com/prometheus/procfs) +[![Build Status](https://travis-ci.org/prometheus/procfs.svg?branch=master)](https://travis-ci.org/prometheus/procfs) +[![Go Report Card](https://goreportcard.com/badge/github.com/prometheus/procfs)](https://goreportcard.com/report/github.com/prometheus/procfs) + +## Usage + +The procfs library is organized by packages based on whether the gathered data is coming from +/proc, /sys, or both. Each package contains an `FS` type which represents the path to either /proc, +/sys, or both. For example, cpu statistics are gathered from +`/proc/stat` and are available via the root procfs package. First, the proc filesystem mount +point is initialized, and then the stat information is read. + +```go +fs, err := procfs.NewFS("/proc") +stats, err := fs.Stat() +``` + +Some sub-packages such as `blockdevice`, require access to both the proc and sys filesystems. + +```go + fs, err := blockdevice.NewFS("/proc", "/sys") + stats, err := fs.ProcDiskstats() +``` + +## Package Organization + +The packages in this project are organized according to (1) whether the data comes from the `/proc` or +`/sys` filesystem and (2) the type of information being retrieved. For example, most process information +can be gathered from the functions in the root `procfs` package. Information about block devices such as disk drives +is available in the `blockdevices` sub-package. + +## Building and Testing + +The procfs library is intended to be built as part of another application, so there are no distributable binaries. +However, most of the API includes unit tests which can be run with `make test`. + +### Updating Test Fixtures + +The procfs library includes a set of test fixtures which include many example files from +the `/proc` and `/sys` filesystems. These fixtures are included as a [ttar](https://github.com/ideaship/ttar) file +which is extracted automatically during testing. To add/update the test fixtures, first +ensure the `fixtures` directory is up to date by removing the existing directory and then +extracting the ttar file using `make fixtures/.unpacked` or just `make test`. + +```bash +rm -rf fixtures +make test +``` + +Next, make the required changes to the extracted files in the `fixtures` directory. When +the changes are complete, run `make update_fixtures` to create a new `fixtures.ttar` file +based on the updated `fixtures` directory. And finally, verify the changes using +`git diff fixtures.ttar`. diff --git a/vendor/github.com/prometheus/procfs/SECURITY.md b/vendor/github.com/prometheus/procfs/SECURITY.md new file mode 100644 index 00000000..67741f01 --- /dev/null +++ b/vendor/github.com/prometheus/procfs/SECURITY.md @@ -0,0 +1,6 @@ +# Reporting a security issue + +The Prometheus security policy, including how to report vulnerabilities, can be +found here: + +https://prometheus.io/docs/operating/security/ diff --git a/vendor/github.com/prometheus/procfs/arp.go b/vendor/github.com/prometheus/procfs/arp.go new file mode 100644 index 00000000..4e47e617 --- /dev/null +++ b/vendor/github.com/prometheus/procfs/arp.go @@ -0,0 +1,85 @@ +// Copyright 2019 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package procfs + +import ( + "fmt" + "io/ioutil" + "net" + "strings" +) + +// ARPEntry contains a single row of the columnar data represented in +// /proc/net/arp. +type ARPEntry struct { + // IP address + IPAddr net.IP + // MAC address + HWAddr net.HardwareAddr + // Name of the device + Device string +} + +// GatherARPEntries retrieves all the ARP entries, parse the relevant columns, +// and then return a slice of ARPEntry's. +func (fs FS) GatherARPEntries() ([]ARPEntry, error) { + data, err := ioutil.ReadFile(fs.proc.Path("net/arp")) + if err != nil { + return nil, fmt.Errorf("error reading arp %q: %w", fs.proc.Path("net/arp"), err) + } + + return parseARPEntries(data) +} + +func parseARPEntries(data []byte) ([]ARPEntry, error) { + lines := strings.Split(string(data), "\n") + entries := make([]ARPEntry, 0) + var err error + const ( + expectedDataWidth = 6 + expectedHeaderWidth = 9 + ) + for _, line := range lines { + columns := strings.Fields(line) + width := len(columns) + + if width == expectedHeaderWidth || width == 0 { + continue + } else if width == expectedDataWidth { + entry, err := parseARPEntry(columns) + if err != nil { + return []ARPEntry{}, fmt.Errorf("failed to parse ARP entry: %w", err) + } + entries = append(entries, entry) + } else { + return []ARPEntry{}, fmt.Errorf("%d columns were detected, but %d were expected", width, expectedDataWidth) + } + + } + + return entries, err +} + +func parseARPEntry(columns []string) (ARPEntry, error) { + ip := net.ParseIP(columns[0]) + mac := net.HardwareAddr(columns[3]) + + entry := ARPEntry{ + IPAddr: ip, + HWAddr: mac, + Device: columns[5], + } + + return entry, nil +} diff --git a/vendor/github.com/prometheus/procfs/buddyinfo.go b/vendor/github.com/prometheus/procfs/buddyinfo.go new file mode 100644 index 00000000..f5b7939b --- /dev/null +++ b/vendor/github.com/prometheus/procfs/buddyinfo.go @@ -0,0 +1,85 @@ +// Copyright 2017 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package procfs + +import ( + "bufio" + "fmt" + "io" + "os" + "strconv" + "strings" +) + +// A BuddyInfo is the details parsed from /proc/buddyinfo. +// The data is comprised of an array of free fragments of each size. +// The sizes are 2^n*PAGE_SIZE, where n is the array index. +type BuddyInfo struct { + Node string + Zone string + Sizes []float64 +} + +// BuddyInfo reads the buddyinfo statistics from the specified `proc` filesystem. +func (fs FS) BuddyInfo() ([]BuddyInfo, error) { + file, err := os.Open(fs.proc.Path("buddyinfo")) + if err != nil { + return nil, err + } + defer file.Close() + + return parseBuddyInfo(file) +} + +func parseBuddyInfo(r io.Reader) ([]BuddyInfo, error) { + var ( + buddyInfo = []BuddyInfo{} + scanner = bufio.NewScanner(r) + bucketCount = -1 + ) + + for scanner.Scan() { + var err error + line := scanner.Text() + parts := strings.Fields(line) + + if len(parts) < 4 { + return nil, fmt.Errorf("invalid number of fields when parsing buddyinfo") + } + + node := strings.TrimRight(parts[1], ",") + zone := strings.TrimRight(parts[3], ",") + arraySize := len(parts[4:]) + + if bucketCount == -1 { + bucketCount = arraySize + } else { + if bucketCount != arraySize { + return nil, fmt.Errorf("mismatch in number of buddyinfo buckets, previous count %d, new count %d", bucketCount, arraySize) + } + } + + sizes := make([]float64, arraySize) + for i := 0; i < arraySize; i++ { + sizes[i], err = strconv.ParseFloat(parts[i+4], 64) + if err != nil { + return nil, fmt.Errorf("invalid value in buddyinfo: %w", err) + } + } + + buddyInfo = append(buddyInfo, BuddyInfo{node, zone, sizes}) + } + + return buddyInfo, scanner.Err() +} diff --git a/vendor/github.com/prometheus/procfs/cpuinfo.go b/vendor/github.com/prometheus/procfs/cpuinfo.go new file mode 100644 index 00000000..5623b24a --- /dev/null +++ b/vendor/github.com/prometheus/procfs/cpuinfo.go @@ -0,0 +1,481 @@ +// Copyright 2019 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +// +build linux + +package procfs + +import ( + "bufio" + "bytes" + "errors" + "fmt" + "regexp" + "strconv" + "strings" + + "github.com/prometheus/procfs/internal/util" +) + +// CPUInfo contains general information about a system CPU found in /proc/cpuinfo +type CPUInfo struct { + Processor uint + VendorID string + CPUFamily string + Model string + ModelName string + Stepping string + Microcode string + CPUMHz float64 + CacheSize string + PhysicalID string + Siblings uint + CoreID string + CPUCores uint + APICID string + InitialAPICID string + FPU string + FPUException string + CPUIDLevel uint + WP string + Flags []string + Bugs []string + BogoMips float64 + CLFlushSize uint + CacheAlignment uint + AddressSizes string + PowerManagement string +} + +var ( + cpuinfoClockRegexp = regexp.MustCompile(`([\d.]+)`) + cpuinfoS390XProcessorRegexp = regexp.MustCompile(`^processor\s+(\d+):.*`) +) + +// CPUInfo returns information about current system CPUs. +// See https://www.kernel.org/doc/Documentation/filesystems/proc.txt +func (fs FS) CPUInfo() ([]CPUInfo, error) { + data, err := util.ReadFileNoStat(fs.proc.Path("cpuinfo")) + if err != nil { + return nil, err + } + return parseCPUInfo(data) +} + +func parseCPUInfoX86(info []byte) ([]CPUInfo, error) { + scanner := bufio.NewScanner(bytes.NewReader(info)) + + // find the first "processor" line + firstLine := firstNonEmptyLine(scanner) + if !strings.HasPrefix(firstLine, "processor") || !strings.Contains(firstLine, ":") { + return nil, fmt.Errorf("invalid cpuinfo file: %q", firstLine) + } + field := strings.SplitN(firstLine, ": ", 2) + v, err := strconv.ParseUint(field[1], 0, 32) + if err != nil { + return nil, err + } + firstcpu := CPUInfo{Processor: uint(v)} + cpuinfo := []CPUInfo{firstcpu} + i := 0 + + for scanner.Scan() { + line := scanner.Text() + if !strings.Contains(line, ":") { + continue + } + field := strings.SplitN(line, ": ", 2) + switch strings.TrimSpace(field[0]) { + case "processor": + cpuinfo = append(cpuinfo, CPUInfo{}) // start of the next processor + i++ + v, err := strconv.ParseUint(field[1], 0, 32) + if err != nil { + return nil, err + } + cpuinfo[i].Processor = uint(v) + case "vendor", "vendor_id": + cpuinfo[i].VendorID = field[1] + case "cpu family": + cpuinfo[i].CPUFamily = field[1] + case "model": + cpuinfo[i].Model = field[1] + case "model name": + cpuinfo[i].ModelName = field[1] + case "stepping": + cpuinfo[i].Stepping = field[1] + case "microcode": + cpuinfo[i].Microcode = field[1] + case "cpu MHz": + v, err := strconv.ParseFloat(field[1], 64) + if err != nil { + return nil, err + } + cpuinfo[i].CPUMHz = v + case "cache size": + cpuinfo[i].CacheSize = field[1] + case "physical id": + cpuinfo[i].PhysicalID = field[1] + case "siblings": + v, err := strconv.ParseUint(field[1], 0, 32) + if err != nil { + return nil, err + } + cpuinfo[i].Siblings = uint(v) + case "core id": + cpuinfo[i].CoreID = field[1] + case "cpu cores": + v, err := strconv.ParseUint(field[1], 0, 32) + if err != nil { + return nil, err + } + cpuinfo[i].CPUCores = uint(v) + case "apicid": + cpuinfo[i].APICID = field[1] + case "initial apicid": + cpuinfo[i].InitialAPICID = field[1] + case "fpu": + cpuinfo[i].FPU = field[1] + case "fpu_exception": + cpuinfo[i].FPUException = field[1] + case "cpuid level": + v, err := strconv.ParseUint(field[1], 0, 32) + if err != nil { + return nil, err + } + cpuinfo[i].CPUIDLevel = uint(v) + case "wp": + cpuinfo[i].WP = field[1] + case "flags": + cpuinfo[i].Flags = strings.Fields(field[1]) + case "bugs": + cpuinfo[i].Bugs = strings.Fields(field[1]) + case "bogomips": + v, err := strconv.ParseFloat(field[1], 64) + if err != nil { + return nil, err + } + cpuinfo[i].BogoMips = v + case "clflush size": + v, err := strconv.ParseUint(field[1], 0, 32) + if err != nil { + return nil, err + } + cpuinfo[i].CLFlushSize = uint(v) + case "cache_alignment": + v, err := strconv.ParseUint(field[1], 0, 32) + if err != nil { + return nil, err + } + cpuinfo[i].CacheAlignment = uint(v) + case "address sizes": + cpuinfo[i].AddressSizes = field[1] + case "power management": + cpuinfo[i].PowerManagement = field[1] + } + } + return cpuinfo, nil +} + +func parseCPUInfoARM(info []byte) ([]CPUInfo, error) { + scanner := bufio.NewScanner(bytes.NewReader(info)) + + firstLine := firstNonEmptyLine(scanner) + match, _ := regexp.MatchString("^[Pp]rocessor", firstLine) + if !match || !strings.Contains(firstLine, ":") { + return nil, fmt.Errorf("invalid cpuinfo file: %q", firstLine) + } + field := strings.SplitN(firstLine, ": ", 2) + cpuinfo := []CPUInfo{} + featuresLine := "" + commonCPUInfo := CPUInfo{} + i := 0 + if strings.TrimSpace(field[0]) == "Processor" { + commonCPUInfo = CPUInfo{ModelName: field[1]} + i = -1 + } else { + v, err := strconv.ParseUint(field[1], 0, 32) + if err != nil { + return nil, err + } + firstcpu := CPUInfo{Processor: uint(v)} + cpuinfo = []CPUInfo{firstcpu} + } + + for scanner.Scan() { + line := scanner.Text() + if !strings.Contains(line, ":") { + continue + } + field := strings.SplitN(line, ": ", 2) + switch strings.TrimSpace(field[0]) { + case "processor": + cpuinfo = append(cpuinfo, commonCPUInfo) // start of the next processor + i++ + v, err := strconv.ParseUint(field[1], 0, 32) + if err != nil { + return nil, err + } + cpuinfo[i].Processor = uint(v) + case "BogoMIPS": + if i == -1 { + cpuinfo = append(cpuinfo, commonCPUInfo) // There is only one processor + i++ + cpuinfo[i].Processor = 0 + } + v, err := strconv.ParseFloat(field[1], 64) + if err != nil { + return nil, err + } + cpuinfo[i].BogoMips = v + case "Features": + featuresLine = line + case "model name": + cpuinfo[i].ModelName = field[1] + } + } + fields := strings.SplitN(featuresLine, ": ", 2) + for i := range cpuinfo { + cpuinfo[i].Flags = strings.Fields(fields[1]) + } + return cpuinfo, nil + +} + +func parseCPUInfoS390X(info []byte) ([]CPUInfo, error) { + scanner := bufio.NewScanner(bytes.NewReader(info)) + + firstLine := firstNonEmptyLine(scanner) + if !strings.HasPrefix(firstLine, "vendor_id") || !strings.Contains(firstLine, ":") { + return nil, fmt.Errorf("invalid cpuinfo file: %q", firstLine) + } + field := strings.SplitN(firstLine, ": ", 2) + cpuinfo := []CPUInfo{} + commonCPUInfo := CPUInfo{VendorID: field[1]} + + for scanner.Scan() { + line := scanner.Text() + if !strings.Contains(line, ":") { + continue + } + field := strings.SplitN(line, ": ", 2) + switch strings.TrimSpace(field[0]) { + case "bogomips per cpu": + v, err := strconv.ParseFloat(field[1], 64) + if err != nil { + return nil, err + } + commonCPUInfo.BogoMips = v + case "features": + commonCPUInfo.Flags = strings.Fields(field[1]) + } + if strings.HasPrefix(line, "processor") { + match := cpuinfoS390XProcessorRegexp.FindStringSubmatch(line) + if len(match) < 2 { + return nil, fmt.Errorf("invalid cpuinfo file: %q", firstLine) + } + cpu := commonCPUInfo + v, err := strconv.ParseUint(match[1], 0, 32) + if err != nil { + return nil, err + } + cpu.Processor = uint(v) + cpuinfo = append(cpuinfo, cpu) + } + if strings.HasPrefix(line, "cpu number") { + break + } + } + + i := 0 + for scanner.Scan() { + line := scanner.Text() + if !strings.Contains(line, ":") { + continue + } + field := strings.SplitN(line, ": ", 2) + switch strings.TrimSpace(field[0]) { + case "cpu number": + i++ + case "cpu MHz dynamic": + clock := cpuinfoClockRegexp.FindString(strings.TrimSpace(field[1])) + v, err := strconv.ParseFloat(clock, 64) + if err != nil { + return nil, err + } + cpuinfo[i].CPUMHz = v + case "physical id": + cpuinfo[i].PhysicalID = field[1] + case "core id": + cpuinfo[i].CoreID = field[1] + case "cpu cores": + v, err := strconv.ParseUint(field[1], 0, 32) + if err != nil { + return nil, err + } + cpuinfo[i].CPUCores = uint(v) + case "siblings": + v, err := strconv.ParseUint(field[1], 0, 32) + if err != nil { + return nil, err + } + cpuinfo[i].Siblings = uint(v) + } + } + + return cpuinfo, nil +} + +func parseCPUInfoMips(info []byte) ([]CPUInfo, error) { + scanner := bufio.NewScanner(bytes.NewReader(info)) + + // find the first "processor" line + firstLine := firstNonEmptyLine(scanner) + if !strings.HasPrefix(firstLine, "system type") || !strings.Contains(firstLine, ":") { + return nil, fmt.Errorf("invalid cpuinfo file: %q", firstLine) + } + field := strings.SplitN(firstLine, ": ", 2) + cpuinfo := []CPUInfo{} + systemType := field[1] + + i := 0 + + for scanner.Scan() { + line := scanner.Text() + if !strings.Contains(line, ":") { + continue + } + field := strings.SplitN(line, ": ", 2) + switch strings.TrimSpace(field[0]) { + case "processor": + v, err := strconv.ParseUint(field[1], 0, 32) + if err != nil { + return nil, err + } + i = int(v) + cpuinfo = append(cpuinfo, CPUInfo{}) // start of the next processor + cpuinfo[i].Processor = uint(v) + cpuinfo[i].VendorID = systemType + case "cpu model": + cpuinfo[i].ModelName = field[1] + case "BogoMIPS": + v, err := strconv.ParseFloat(field[1], 64) + if err != nil { + return nil, err + } + cpuinfo[i].BogoMips = v + } + } + return cpuinfo, nil +} + +func parseCPUInfoPPC(info []byte) ([]CPUInfo, error) { + scanner := bufio.NewScanner(bytes.NewReader(info)) + + firstLine := firstNonEmptyLine(scanner) + if !strings.HasPrefix(firstLine, "processor") || !strings.Contains(firstLine, ":") { + return nil, fmt.Errorf("invalid cpuinfo file: %q", firstLine) + } + field := strings.SplitN(firstLine, ": ", 2) + v, err := strconv.ParseUint(field[1], 0, 32) + if err != nil { + return nil, err + } + firstcpu := CPUInfo{Processor: uint(v)} + cpuinfo := []CPUInfo{firstcpu} + i := 0 + + for scanner.Scan() { + line := scanner.Text() + if !strings.Contains(line, ":") { + continue + } + field := strings.SplitN(line, ": ", 2) + switch strings.TrimSpace(field[0]) { + case "processor": + cpuinfo = append(cpuinfo, CPUInfo{}) // start of the next processor + i++ + v, err := strconv.ParseUint(field[1], 0, 32) + if err != nil { + return nil, err + } + cpuinfo[i].Processor = uint(v) + case "cpu": + cpuinfo[i].VendorID = field[1] + case "clock": + clock := cpuinfoClockRegexp.FindString(strings.TrimSpace(field[1])) + v, err := strconv.ParseFloat(clock, 64) + if err != nil { + return nil, err + } + cpuinfo[i].CPUMHz = v + } + } + return cpuinfo, nil +} + +func parseCPUInfoRISCV(info []byte) ([]CPUInfo, error) { + scanner := bufio.NewScanner(bytes.NewReader(info)) + + firstLine := firstNonEmptyLine(scanner) + if !strings.HasPrefix(firstLine, "processor") || !strings.Contains(firstLine, ":") { + return nil, fmt.Errorf("invalid cpuinfo file: %q", firstLine) + } + field := strings.SplitN(firstLine, ": ", 2) + v, err := strconv.ParseUint(field[1], 0, 32) + if err != nil { + return nil, err + } + firstcpu := CPUInfo{Processor: uint(v)} + cpuinfo := []CPUInfo{firstcpu} + i := 0 + + for scanner.Scan() { + line := scanner.Text() + if !strings.Contains(line, ":") { + continue + } + field := strings.SplitN(line, ": ", 2) + switch strings.TrimSpace(field[0]) { + case "processor": + v, err := strconv.ParseUint(field[1], 0, 32) + if err != nil { + return nil, err + } + i = int(v) + cpuinfo = append(cpuinfo, CPUInfo{}) // start of the next processor + cpuinfo[i].Processor = uint(v) + case "hart": + cpuinfo[i].CoreID = field[1] + case "isa": + cpuinfo[i].ModelName = field[1] + } + } + return cpuinfo, nil +} + +func parseCPUInfoDummy(_ []byte) ([]CPUInfo, error) { // nolint:unused,deadcode + return nil, errors.New("not implemented") +} + +// firstNonEmptyLine advances the scanner to the first non-empty line +// and returns the contents of that line +func firstNonEmptyLine(scanner *bufio.Scanner) string { + for scanner.Scan() { + line := scanner.Text() + if strings.TrimSpace(line) != "" { + return line + } + } + return "" +} diff --git a/vendor/github.com/prometheus/procfs/cpuinfo_armx.go b/vendor/github.com/prometheus/procfs/cpuinfo_armx.go new file mode 100644 index 00000000..44b590ed --- /dev/null +++ b/vendor/github.com/prometheus/procfs/cpuinfo_armx.go @@ -0,0 +1,19 @@ +// Copyright 2020 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +// +build linux +// +build arm arm64 + +package procfs + +var parseCPUInfo = parseCPUInfoARM diff --git a/vendor/github.com/prometheus/procfs/cpuinfo_mipsx.go b/vendor/github.com/prometheus/procfs/cpuinfo_mipsx.go new file mode 100644 index 00000000..91e27257 --- /dev/null +++ b/vendor/github.com/prometheus/procfs/cpuinfo_mipsx.go @@ -0,0 +1,19 @@ +// Copyright 2020 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +// +build linux +// +build mips mipsle mips64 mips64le + +package procfs + +var parseCPUInfo = parseCPUInfoMips diff --git a/vendor/github.com/prometheus/procfs/cpuinfo_others.go b/vendor/github.com/prometheus/procfs/cpuinfo_others.go new file mode 100644 index 00000000..95b5b4ec --- /dev/null +++ b/vendor/github.com/prometheus/procfs/cpuinfo_others.go @@ -0,0 +1,19 @@ +// Copyright 2020 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +// +build linux +// +build !386,!amd64,!arm,!arm64,!mips,!mips64,!mips64le,!mipsle,!ppc64,!ppc64le,!riscv64,!s390x + +package procfs + +var parseCPUInfo = parseCPUInfoDummy diff --git a/vendor/github.com/prometheus/procfs/cpuinfo_ppcx.go b/vendor/github.com/prometheus/procfs/cpuinfo_ppcx.go new file mode 100644 index 00000000..6068bd57 --- /dev/null +++ b/vendor/github.com/prometheus/procfs/cpuinfo_ppcx.go @@ -0,0 +1,19 @@ +// Copyright 2020 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +// +build linux +// +build ppc64 ppc64le + +package procfs + +var parseCPUInfo = parseCPUInfoPPC diff --git a/vendor/github.com/prometheus/procfs/cpuinfo_riscvx.go b/vendor/github.com/prometheus/procfs/cpuinfo_riscvx.go new file mode 100644 index 00000000..e83c2e20 --- /dev/null +++ b/vendor/github.com/prometheus/procfs/cpuinfo_riscvx.go @@ -0,0 +1,19 @@ +// Copyright 2020 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +// +build linux +// +build riscv riscv64 + +package procfs + +var parseCPUInfo = parseCPUInfoRISCV diff --git a/vendor/github.com/prometheus/procfs/cpuinfo_s390x.go b/vendor/github.com/prometheus/procfs/cpuinfo_s390x.go new file mode 100644 index 00000000..26814eeb --- /dev/null +++ b/vendor/github.com/prometheus/procfs/cpuinfo_s390x.go @@ -0,0 +1,18 @@ +// Copyright 2020 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +// +build linux + +package procfs + +var parseCPUInfo = parseCPUInfoS390X diff --git a/vendor/github.com/prometheus/procfs/cpuinfo_x86.go b/vendor/github.com/prometheus/procfs/cpuinfo_x86.go new file mode 100644 index 00000000..d5bedf97 --- /dev/null +++ b/vendor/github.com/prometheus/procfs/cpuinfo_x86.go @@ -0,0 +1,19 @@ +// Copyright 2020 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +// +build linux +// +build 386 amd64 + +package procfs + +var parseCPUInfo = parseCPUInfoX86 diff --git a/vendor/github.com/prometheus/procfs/crypto.go b/vendor/github.com/prometheus/procfs/crypto.go new file mode 100644 index 00000000..5048ad1f --- /dev/null +++ b/vendor/github.com/prometheus/procfs/crypto.go @@ -0,0 +1,153 @@ +// Copyright 2019 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package procfs + +import ( + "bufio" + "bytes" + "fmt" + "io" + "strings" + + "github.com/prometheus/procfs/internal/util" +) + +// Crypto holds info parsed from /proc/crypto. +type Crypto struct { + Alignmask *uint64 + Async bool + Blocksize *uint64 + Chunksize *uint64 + Ctxsize *uint64 + Digestsize *uint64 + Driver string + Geniv string + Internal string + Ivsize *uint64 + Maxauthsize *uint64 + MaxKeysize *uint64 + MinKeysize *uint64 + Module string + Name string + Priority *int64 + Refcnt *int64 + Seedsize *uint64 + Selftest string + Type string + Walksize *uint64 +} + +// Crypto parses an crypto-file (/proc/crypto) and returns a slice of +// structs containing the relevant info. More information available here: +// https://kernel.readthedocs.io/en/sphinx-samples/crypto-API.html +func (fs FS) Crypto() ([]Crypto, error) { + path := fs.proc.Path("crypto") + b, err := util.ReadFileNoStat(path) + if err != nil { + return nil, fmt.Errorf("error reading crypto %q: %w", path, err) + } + + crypto, err := parseCrypto(bytes.NewReader(b)) + if err != nil { + return nil, fmt.Errorf("error parsing crypto %q: %w", path, err) + } + + return crypto, nil +} + +// parseCrypto parses a /proc/crypto stream into Crypto elements. +func parseCrypto(r io.Reader) ([]Crypto, error) { + var out []Crypto + + s := bufio.NewScanner(r) + for s.Scan() { + text := s.Text() + switch { + case strings.HasPrefix(text, "name"): + // Each crypto element begins with its name. + out = append(out, Crypto{}) + case text == "": + continue + } + + kv := strings.Split(text, ":") + if len(kv) != 2 { + return nil, fmt.Errorf("malformed crypto line: %q", text) + } + + k := strings.TrimSpace(kv[0]) + v := strings.TrimSpace(kv[1]) + + // Parse the key/value pair into the currently focused element. + c := &out[len(out)-1] + if err := c.parseKV(k, v); err != nil { + return nil, err + } + } + + if err := s.Err(); err != nil { + return nil, err + } + + return out, nil +} + +// parseKV parses a key/value pair into the appropriate field of c. +func (c *Crypto) parseKV(k, v string) error { + vp := util.NewValueParser(v) + + switch k { + case "async": + // Interpret literal yes as true. + c.Async = v == "yes" + case "blocksize": + c.Blocksize = vp.PUInt64() + case "chunksize": + c.Chunksize = vp.PUInt64() + case "digestsize": + c.Digestsize = vp.PUInt64() + case "driver": + c.Driver = v + case "geniv": + c.Geniv = v + case "internal": + c.Internal = v + case "ivsize": + c.Ivsize = vp.PUInt64() + case "maxauthsize": + c.Maxauthsize = vp.PUInt64() + case "max keysize": + c.MaxKeysize = vp.PUInt64() + case "min keysize": + c.MinKeysize = vp.PUInt64() + case "module": + c.Module = v + case "name": + c.Name = v + case "priority": + c.Priority = vp.PInt64() + case "refcnt": + c.Refcnt = vp.PInt64() + case "seedsize": + c.Seedsize = vp.PUInt64() + case "selftest": + c.Selftest = v + case "type": + c.Type = v + case "walksize": + c.Walksize = vp.PUInt64() + } + + return vp.Err() +} diff --git a/vendor/github.com/prometheus/procfs/doc.go b/vendor/github.com/prometheus/procfs/doc.go new file mode 100644 index 00000000..e2acd6d4 --- /dev/null +++ b/vendor/github.com/prometheus/procfs/doc.go @@ -0,0 +1,45 @@ +// Copyright 2014 Prometheus Team +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +// Package procfs provides functions to retrieve system, kernel and process +// metrics from the pseudo-filesystem proc. +// +// Example: +// +// package main +// +// import ( +// "fmt" +// "log" +// +// "github.com/prometheus/procfs" +// ) +// +// func main() { +// p, err := procfs.Self() +// if err != nil { +// log.Fatalf("could not get process: %s", err) +// } +// +// stat, err := p.NewStat() +// if err != nil { +// log.Fatalf("could not get process stat: %s", err) +// } +// +// fmt.Printf("command: %s\n", stat.Comm) +// fmt.Printf("cpu time: %fs\n", stat.CPUTime()) +// fmt.Printf("vsize: %dB\n", stat.VirtualMemory()) +// fmt.Printf("rss: %dB\n", stat.ResidentMemory()) +// } +// +package procfs diff --git a/vendor/github.com/prometheus/procfs/fixtures.ttar b/vendor/github.com/prometheus/procfs/fixtures.ttar new file mode 100644 index 00000000..1e76173d --- /dev/null +++ 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: ghash_clmulni_intel +priority : 0 +refcnt : 1 +selftest : passed +internal : yes +type : shash +blocksize : 16 +digestsize : 16 + +name : crc32c +driver : crc32c-intel +module : crc32c_intel +priority : 200 +refcnt : 5 +selftest : passed +internal : no +type : shash +blocksize : 1 +digestsize : 4 + +name : cbc(aes) +driver : cbc(aes-aesni) +module : kernel +priority : 300 +refcnt : 1 +selftest : passed +internal : no +type : skcipher +async : no +blocksize : 16 +min keysize : 16 +max keysize : 32 +ivsize : 16 +chunksize : 16 +walksize : 16 + +name : ctr(aes) +driver : ctr(aes-aesni) +module : kernel +priority : 300 +refcnt : 5 +selftest : passed +internal : no +type : skcipher +async : no +blocksize : 1 +min keysize : 16 +max keysize : 32 +ivsize : 16 +chunksize : 16 +walksize : 16 + +name : pkcs1pad(rsa,sha256) +driver : pkcs1pad(rsa-generic,sha256) +module : kernel +priority : 100 +refcnt : 1 +selftest : passed +internal : no +type : akcipher + +name : __xts(aes) +driver : 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: 16 +min keysize : 16 +max keysize : 32 +ivsize : 16 +chunksize : 16 +walksize : 16 + +name : __ecb(aes) +driver : __ecb-aes-aesni +module : kernel +priority : 400 +refcnt : 1 +selftest : passed +internal : yes +type : skcipher +async : no +blocksize : 16 +min keysize : 16 +max keysize : 32 +ivsize : 0 +chunksize : 16 +walksize : 16 + +name : __aes +driver : __aes-aesni +module : kernel +priority : 300 +refcnt : 1 +selftest : passed +internal : yes +type : cipher +blocksize : 16 +min keysize : 16 +max keysize : 32 + +name : aes +driver : aes-aesni +module : kernel +priority : 300 +refcnt : 8 +selftest : passed +internal : no +type : cipher +blocksize : 16 +min keysize : 16 +max keysize : 32 + +name : hmac(sha1) +driver : hmac(sha1-generic) +module : kernel +priority : 100 +refcnt : 9 +selftest : passed +internal : no +type : shash +blocksize : 64 +digestsize : 20 + +name : ghash +driver : ghash-generic +module : kernel +priority : 100 +refcnt : 3 +selftest : passed +internal : no 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- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - +Path: fixtures/sys/kernel/config/target/iscsi/iqn.2016-11.org.linux-iscsi.igw.x86:sn.ramdemo/tpgt_1/lun/lun_0/statistics/scsi_tgt_port/in_cmds +Lines: 1 +1234 +Mode: 644 +# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - +Path: fixtures/sys/kernel/config/target/iscsi/iqn.2016-11.org.linux-iscsi.igw.x86:sn.ramdemo/tpgt_1/lun/lun_0/statistics/scsi_tgt_port/read_mbytes +Lines: 1 +1504 +Mode: 644 +# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - +Path: fixtures/sys/kernel/config/target/iscsi/iqn.2016-11.org.linux-iscsi.igw.x86:sn.ramdemo/tpgt_1/lun/lun_0/statistics/scsi_tgt_port/write_mbytes +Lines: 1 +4733 +Mode: 644 +# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - diff --git a/vendor/github.com/prometheus/procfs/fs.go b/vendor/github.com/prometheus/procfs/fs.go new file mode 100644 index 00000000..0102ab0f --- /dev/null +++ b/vendor/github.com/prometheus/procfs/fs.go @@ -0,0 +1,43 @@ +// Copyright 2018 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package procfs + +import ( + "github.com/prometheus/procfs/internal/fs" +) + +// FS represents the pseudo-filesystem sys, which provides an interface to +// kernel data structures. +type FS struct { + proc fs.FS +} + +// DefaultMountPoint is the common mount point of the proc filesystem. +const DefaultMountPoint = fs.DefaultProcMountPoint + +// NewDefaultFS returns a new proc FS mounted under the default proc mountPoint. +// It will error if the mount point directory can't be read or is a file. +func NewDefaultFS() (FS, error) { + return NewFS(DefaultMountPoint) +} + +// NewFS returns a new proc FS mounted under the given proc mountPoint. It will error +// if the mount point directory can't be read or is a file. +func NewFS(mountPoint string) (FS, error) { + fs, err := fs.NewFS(mountPoint) + if err != nil { + return FS{}, err + } + return FS{fs}, nil +} diff --git a/vendor/github.com/prometheus/procfs/fscache.go b/vendor/github.com/prometheus/procfs/fscache.go new file mode 100644 index 00000000..f8070e6e --- /dev/null +++ b/vendor/github.com/prometheus/procfs/fscache.go @@ -0,0 +1,422 @@ +// Copyright 2019 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package procfs + +import ( + "bufio" + "bytes" + "fmt" + "io" + "strconv" + "strings" + + "github.com/prometheus/procfs/internal/util" +) + +// Fscacheinfo represents fscache statistics. +type Fscacheinfo struct { + // Number of index cookies allocated + IndexCookiesAllocated uint64 + // data storage cookies allocated + DataStorageCookiesAllocated uint64 + // Number of special cookies allocated + SpecialCookiesAllocated uint64 + // Number of objects allocated + ObjectsAllocated uint64 + // Number of object allocation failures + ObjectAllocationsFailure uint64 + // Number of objects that reached the available state + ObjectsAvailable uint64 + // Number of objects that reached the dead state + ObjectsDead uint64 + // Number of objects that didn't have a coherency check + ObjectsWithoutCoherencyCheck uint64 + // Number of objects that passed a coherency check + ObjectsWithCoherencyCheck uint64 + // Number of objects that needed a coherency data update + ObjectsNeedCoherencyCheckUpdate uint64 + // Number of objects that were declared obsolete + ObjectsDeclaredObsolete uint64 + // Number of pages marked as being cached + PagesMarkedAsBeingCached uint64 + // Number of uncache page requests seen + UncachePagesRequestSeen uint64 + // Number of acquire cookie requests seen + AcquireCookiesRequestSeen uint64 + // Number of acq reqs given a NULL parent + AcquireRequestsWithNullParent uint64 + // Number of acq reqs rejected due to no cache available + AcquireRequestsRejectedNoCacheAvailable uint64 + // Number of acq reqs succeeded + AcquireRequestsSucceeded uint64 + // Number of acq reqs rejected due to error + AcquireRequestsRejectedDueToError uint64 + // Number of acq reqs failed on ENOMEM + AcquireRequestsFailedDueToEnomem uint64 + // Number of lookup calls made on cache backends + LookupsNumber uint64 + // Number of negative lookups made + LookupsNegative uint64 + // Number of positive lookups made + LookupsPositive uint64 + // Number of objects created by lookup + ObjectsCreatedByLookup uint64 + // Number of lookups timed out and requeued + LookupsTimedOutAndRequed uint64 + InvalidationsNumber uint64 + InvalidationsRunning uint64 + // Number of update cookie requests seen + UpdateCookieRequestSeen uint64 + // Number of upd reqs given a NULL parent + UpdateRequestsWithNullParent uint64 + // Number of upd reqs granted CPU time + UpdateRequestsRunning uint64 + // Number of relinquish cookie requests seen + RelinquishCookiesRequestSeen uint64 + // Number of rlq reqs given a NULL parent + RelinquishCookiesWithNullParent uint64 + // Number of rlq reqs waited on completion of creation + RelinquishRequestsWaitingCompleteCreation uint64 + // Relinqs rtr + RelinquishRetries uint64 + // Number of attribute changed requests seen + AttributeChangedRequestsSeen uint64 + // Number of attr changed requests queued + AttributeChangedRequestsQueued uint64 + // Number of attr changed rejected -ENOBUFS + AttributeChangedRejectDueToEnobufs uint64 + // Number of attr changed failed -ENOMEM + AttributeChangedFailedDueToEnomem uint64 + // Number of attr changed ops given CPU time + AttributeChangedOps uint64 + // Number of allocation requests seen + AllocationRequestsSeen uint64 + // Number of successful alloc reqs + AllocationOkRequests uint64 + // Number of alloc reqs that waited on lookup completion + AllocationWaitingOnLookup uint64 + // Number of alloc reqs rejected -ENOBUFS + AllocationsRejectedDueToEnobufs uint64 + // Number of alloc reqs aborted -ERESTARTSYS + AllocationsAbortedDueToErestartsys uint64 + // Number of alloc reqs submitted + AllocationOperationsSubmitted uint64 + // Number of alloc reqs waited for CPU time + AllocationsWaitedForCPU uint64 + // Number of alloc reqs aborted due to object death + AllocationsAbortedDueToObjectDeath uint64 + // Number of retrieval (read) requests seen + RetrievalsReadRequests uint64 + // Number of successful retr reqs + RetrievalsOk uint64 + // Number of retr reqs that waited on lookup completion + RetrievalsWaitingLookupCompletion uint64 + // Number of retr reqs returned -ENODATA + RetrievalsReturnedEnodata uint64 + // Number of retr reqs rejected -ENOBUFS + RetrievalsRejectedDueToEnobufs uint64 + // Number of retr reqs aborted -ERESTARTSYS + RetrievalsAbortedDueToErestartsys uint64 + // Number of retr reqs failed -ENOMEM + RetrievalsFailedDueToEnomem uint64 + // Number of retr reqs submitted + RetrievalsRequests uint64 + // Number of retr reqs waited for CPU time + RetrievalsWaitingCPU uint64 + // Number of retr reqs aborted due to object death + RetrievalsAbortedDueToObjectDeath uint64 + // Number of storage (write) requests seen + StoreWriteRequests uint64 + // Number of successful store reqs + StoreSuccessfulRequests uint64 + // Number of store reqs on a page already pending storage + StoreRequestsOnPendingStorage uint64 + // Number of store reqs rejected -ENOBUFS + StoreRequestsRejectedDueToEnobufs uint64 + // Number of store reqs failed -ENOMEM + StoreRequestsFailedDueToEnomem uint64 + // Number of store reqs submitted + StoreRequestsSubmitted uint64 + // Number of store reqs granted CPU time + StoreRequestsRunning uint64 + // Number of pages given store req processing time + StorePagesWithRequestsProcessing uint64 + // Number of store reqs deleted from tracking tree + StoreRequestsDeleted uint64 + // Number of store reqs over store limit + StoreRequestsOverStoreLimit uint64 + // Number of release reqs against pages with no pending store + ReleaseRequestsAgainstPagesWithNoPendingStorage uint64 + // Number of release reqs against pages stored by time lock granted + ReleaseRequestsAgainstPagesStoredByTimeLockGranted uint64 + // Number of release reqs ignored due to in-progress store + ReleaseRequestsIgnoredDueToInProgressStore uint64 + // Number of page stores cancelled due to release req + PageStoresCancelledByReleaseRequests uint64 + VmscanWaiting uint64 + // Number of times async ops added to pending queues + OpsPending uint64 + // Number of times async ops given CPU time + OpsRunning uint64 + // Number of times async ops queued for processing + OpsEnqueued uint64 + // Number of async ops cancelled + OpsCancelled uint64 + // Number of async ops rejected due to object lookup/create failure + OpsRejected uint64 + // Number of async ops initialised + OpsInitialised uint64 + // Number of async ops queued for deferred release + OpsDeferred uint64 + // Number of async ops released (should equal ini=N when idle) + OpsReleased uint64 + // Number of deferred-release async ops garbage collected + OpsGarbageCollected uint64 + // Number of in-progress alloc_object() cache ops + CacheopAllocationsinProgress uint64 + // Number of in-progress lookup_object() cache ops + CacheopLookupObjectInProgress uint64 + // Number of in-progress lookup_complete() cache ops + CacheopLookupCompleteInPorgress uint64 + // Number of in-progress grab_object() cache ops + CacheopGrabObjectInProgress uint64 + CacheopInvalidations uint64 + // Number of in-progress update_object() cache ops + CacheopUpdateObjectInProgress uint64 + // Number of in-progress drop_object() cache ops + CacheopDropObjectInProgress uint64 + // Number of in-progress put_object() cache ops + CacheopPutObjectInProgress uint64 + // Number of in-progress attr_changed() cache ops + CacheopAttributeChangeInProgress uint64 + // Number of in-progress sync_cache() cache ops + CacheopSyncCacheInProgress uint64 + // Number of in-progress read_or_alloc_page() cache ops + CacheopReadOrAllocPageInProgress uint64 + // Number of in-progress read_or_alloc_pages() cache ops + CacheopReadOrAllocPagesInProgress uint64 + // Number of in-progress allocate_page() cache ops + CacheopAllocatePageInProgress uint64 + // Number of in-progress allocate_pages() cache ops + CacheopAllocatePagesInProgress uint64 + // Number of in-progress write_page() cache ops + CacheopWritePagesInProgress uint64 + // Number of in-progress uncache_page() cache ops + CacheopUncachePagesInProgress uint64 + // Number of in-progress dissociate_pages() cache ops + CacheopDissociatePagesInProgress uint64 + // Number of object lookups/creations rejected due to lack of space + CacheevLookupsAndCreationsRejectedLackSpace uint64 + // Number of stale objects deleted + CacheevStaleObjectsDeleted uint64 + // Number of objects retired when relinquished + CacheevRetiredWhenReliquished uint64 + // Number of objects culled + CacheevObjectsCulled uint64 +} + +// Fscacheinfo returns information about current fscache statistics. +// See https://www.kernel.org/doc/Documentation/filesystems/caching/fscache.txt +func (fs FS) Fscacheinfo() (Fscacheinfo, error) { + b, err := util.ReadFileNoStat(fs.proc.Path("fs/fscache/stats")) + if err != nil { + return Fscacheinfo{}, err + } + + m, err := parseFscacheinfo(bytes.NewReader(b)) + if err != nil { + return Fscacheinfo{}, fmt.Errorf("failed to parse Fscacheinfo: %w", err) + } + + return *m, nil +} + +func setFSCacheFields(fields []string, setFields ...*uint64) error { + var err error + if len(fields) < len(setFields) { + return fmt.Errorf("Insufficient number of fields, expected %v, got %v", len(setFields), len(fields)) + } + + for i := range setFields { + *setFields[i], err = strconv.ParseUint(strings.Split(fields[i], "=")[1], 0, 64) + if err != nil { + return err + } + } + return nil +} + +func parseFscacheinfo(r io.Reader) (*Fscacheinfo, error) { + var m Fscacheinfo + s := bufio.NewScanner(r) + for s.Scan() { + fields := strings.Fields(s.Text()) + if len(fields) < 2 { + return nil, fmt.Errorf("malformed Fscacheinfo line: %q", s.Text()) + } + + switch fields[0] { + case "Cookies:": + err := setFSCacheFields(fields[1:], &m.IndexCookiesAllocated, &m.DataStorageCookiesAllocated, + &m.SpecialCookiesAllocated) + if err != nil { + return &m, err + } + case "Objects:": + err := setFSCacheFields(fields[1:], &m.ObjectsAllocated, &m.ObjectAllocationsFailure, + &m.ObjectsAvailable, &m.ObjectsDead) + if err != nil { + return &m, err + } + case "ChkAux": + err := setFSCacheFields(fields[2:], &m.ObjectsWithoutCoherencyCheck, &m.ObjectsWithCoherencyCheck, + &m.ObjectsNeedCoherencyCheckUpdate, &m.ObjectsDeclaredObsolete) + if err != nil { + return &m, err + } + case "Pages": + err := setFSCacheFields(fields[2:], &m.PagesMarkedAsBeingCached, &m.UncachePagesRequestSeen) + if err != nil { + return &m, err + } + case "Acquire:": + err := setFSCacheFields(fields[1:], &m.AcquireCookiesRequestSeen, &m.AcquireRequestsWithNullParent, + &m.AcquireRequestsRejectedNoCacheAvailable, &m.AcquireRequestsSucceeded, &m.AcquireRequestsRejectedDueToError, + &m.AcquireRequestsFailedDueToEnomem) + if err != nil { + return &m, err + } + case "Lookups:": + err := setFSCacheFields(fields[1:], &m.LookupsNumber, &m.LookupsNegative, &m.LookupsPositive, + &m.ObjectsCreatedByLookup, &m.LookupsTimedOutAndRequed) + if err != nil { + return &m, err + } + case "Invals": + err := setFSCacheFields(fields[2:], &m.InvalidationsNumber, &m.InvalidationsRunning) + if err != nil { + return &m, err + } + case "Updates:": + err := setFSCacheFields(fields[1:], &m.UpdateCookieRequestSeen, &m.UpdateRequestsWithNullParent, + &m.UpdateRequestsRunning) + if err != nil { + return &m, err + } + case "Relinqs:": + err := setFSCacheFields(fields[1:], &m.RelinquishCookiesRequestSeen, &m.RelinquishCookiesWithNullParent, + &m.RelinquishRequestsWaitingCompleteCreation, &m.RelinquishRetries) + if err != nil { + return &m, err + } + case "AttrChg:": + err := setFSCacheFields(fields[1:], &m.AttributeChangedRequestsSeen, &m.AttributeChangedRequestsQueued, + &m.AttributeChangedRejectDueToEnobufs, &m.AttributeChangedFailedDueToEnomem, &m.AttributeChangedOps) + if err != nil { + return &m, err + } + case "Allocs": + if strings.Split(fields[2], "=")[0] == "n" { + err := setFSCacheFields(fields[2:], &m.AllocationRequestsSeen, &m.AllocationOkRequests, + &m.AllocationWaitingOnLookup, &m.AllocationsRejectedDueToEnobufs, &m.AllocationsAbortedDueToErestartsys) + if err != nil { + return &m, err + } + } else { + err := setFSCacheFields(fields[2:], &m.AllocationOperationsSubmitted, &m.AllocationsWaitedForCPU, + &m.AllocationsAbortedDueToObjectDeath) + if err != nil { + return &m, err + } + } + case "Retrvls:": + if strings.Split(fields[1], "=")[0] == "n" { + err := setFSCacheFields(fields[1:], &m.RetrievalsReadRequests, &m.RetrievalsOk, &m.RetrievalsWaitingLookupCompletion, + &m.RetrievalsReturnedEnodata, &m.RetrievalsRejectedDueToEnobufs, &m.RetrievalsAbortedDueToErestartsys, + &m.RetrievalsFailedDueToEnomem) + if err != nil { + return &m, err + } + } else { + err := setFSCacheFields(fields[1:], &m.RetrievalsRequests, &m.RetrievalsWaitingCPU, &m.RetrievalsAbortedDueToObjectDeath) + if err != nil { + return &m, err + } + } + case "Stores": + if strings.Split(fields[2], "=")[0] == "n" { + err := setFSCacheFields(fields[2:], &m.StoreWriteRequests, &m.StoreSuccessfulRequests, + &m.StoreRequestsOnPendingStorage, &m.StoreRequestsRejectedDueToEnobufs, &m.StoreRequestsFailedDueToEnomem) + if err != nil { + return &m, err + } + } else { + err := setFSCacheFields(fields[2:], &m.StoreRequestsSubmitted, &m.StoreRequestsRunning, + &m.StorePagesWithRequestsProcessing, &m.StoreRequestsDeleted, &m.StoreRequestsOverStoreLimit) + if err != nil { + return &m, err + } + } + case "VmScan": + err := setFSCacheFields(fields[2:], &m.ReleaseRequestsAgainstPagesWithNoPendingStorage, + &m.ReleaseRequestsAgainstPagesStoredByTimeLockGranted, &m.ReleaseRequestsIgnoredDueToInProgressStore, + &m.PageStoresCancelledByReleaseRequests, &m.VmscanWaiting) + if err != nil { + return &m, err + } + case "Ops": + if strings.Split(fields[2], "=")[0] == "pend" { + err := setFSCacheFields(fields[2:], &m.OpsPending, &m.OpsRunning, &m.OpsEnqueued, &m.OpsCancelled, &m.OpsRejected) + if err != nil { + return &m, err + } + } else { + err := setFSCacheFields(fields[2:], &m.OpsInitialised, &m.OpsDeferred, &m.OpsReleased, &m.OpsGarbageCollected) + if err != nil { + return &m, err + } + } + case "CacheOp:": + if strings.Split(fields[1], "=")[0] == "alo" { + err := setFSCacheFields(fields[1:], &m.CacheopAllocationsinProgress, &m.CacheopLookupObjectInProgress, + &m.CacheopLookupCompleteInPorgress, &m.CacheopGrabObjectInProgress) + if err != nil { + return &m, err + } + } else if strings.Split(fields[1], "=")[0] == "inv" { + err := setFSCacheFields(fields[1:], &m.CacheopInvalidations, &m.CacheopUpdateObjectInProgress, + &m.CacheopDropObjectInProgress, &m.CacheopPutObjectInProgress, &m.CacheopAttributeChangeInProgress, + &m.CacheopSyncCacheInProgress) + if err != nil { + return &m, err + } + } else { + err := setFSCacheFields(fields[1:], &m.CacheopReadOrAllocPageInProgress, &m.CacheopReadOrAllocPagesInProgress, + &m.CacheopAllocatePageInProgress, &m.CacheopAllocatePagesInProgress, &m.CacheopWritePagesInProgress, + &m.CacheopUncachePagesInProgress, &m.CacheopDissociatePagesInProgress) + if err != nil { + return &m, err + } + } + case "CacheEv:": + err := setFSCacheFields(fields[1:], &m.CacheevLookupsAndCreationsRejectedLackSpace, &m.CacheevStaleObjectsDeleted, + &m.CacheevRetiredWhenReliquished, &m.CacheevObjectsCulled) + if err != nil { + return &m, err + } + } + } + + return &m, nil +} diff --git a/vendor/github.com/prometheus/procfs/go.mod b/vendor/github.com/prometheus/procfs/go.mod new file mode 100644 index 00000000..ba6681f5 --- /dev/null +++ b/vendor/github.com/prometheus/procfs/go.mod @@ -0,0 +1,9 @@ +module github.com/prometheus/procfs + +go 1.13 + +require ( + github.com/google/go-cmp v0.5.4 + golang.org/x/sync v0.0.0-20201207232520-09787c993a3a + golang.org/x/sys v0.0.0-20210124154548-22da62e12c0c +) diff --git a/vendor/github.com/prometheus/procfs/go.sum b/vendor/github.com/prometheus/procfs/go.sum new file mode 100644 index 00000000..7ceaf56b --- /dev/null +++ b/vendor/github.com/prometheus/procfs/go.sum @@ -0,0 +1,8 @@ +github.com/google/go-cmp v0.5.4 h1:L8R9j+yAqZuZjsqh/z+F1NCffTKKLShY6zXTItVIZ8M= +github.com/google/go-cmp v0.5.4/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE= +golang.org/x/sync v0.0.0-20201207232520-09787c993a3a h1:DcqTD9SDLc+1P/r1EmRBwnVsrOwW+kk2vWf9n+1sGhs= +golang.org/x/sync v0.0.0-20201207232520-09787c993a3a/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM= +golang.org/x/sys v0.0.0-20210124154548-22da62e12c0c h1:VwygUrnw9jn88c4u8GD3rZQbqrP/tgas88tPUbBxQrk= +golang.org/x/sys v0.0.0-20210124154548-22da62e12c0c/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= +golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4= +golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0= diff --git a/vendor/github.com/prometheus/procfs/internal/fs/fs.go b/vendor/github.com/prometheus/procfs/internal/fs/fs.go new file mode 100644 index 00000000..0040753b --- /dev/null +++ b/vendor/github.com/prometheus/procfs/internal/fs/fs.go @@ -0,0 +1,55 @@ +// Copyright 2019 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package fs + +import ( + "fmt" + "os" + "path/filepath" +) + +const ( + // DefaultProcMountPoint is the common mount point of the proc filesystem. + DefaultProcMountPoint = "/proc" + + // DefaultSysMountPoint is the common mount point of the sys filesystem. + DefaultSysMountPoint = "/sys" + + // DefaultConfigfsMountPoint is the common mount point of the configfs + DefaultConfigfsMountPoint = "/sys/kernel/config" +) + +// FS represents a pseudo-filesystem, normally /proc or /sys, which provides an +// interface to kernel data structures. +type FS string + +// NewFS returns a new FS mounted under the given mountPoint. It will error +// if the mount point can't be read. +func NewFS(mountPoint string) (FS, error) { + info, err := os.Stat(mountPoint) + if err != nil { + return "", fmt.Errorf("could not read %q: %w", mountPoint, err) + } + if !info.IsDir() { + return "", fmt.Errorf("mount point %q is not a directory", mountPoint) + } + + return FS(mountPoint), nil +} + +// Path appends the given path elements to the filesystem path, adding separators +// as necessary. +func (fs FS) Path(p ...string) string { + return filepath.Join(append([]string{string(fs)}, p...)...) +} diff --git a/vendor/github.com/prometheus/procfs/internal/util/parse.go b/vendor/github.com/prometheus/procfs/internal/util/parse.go new file mode 100644 index 00000000..22cb07a6 --- /dev/null +++ b/vendor/github.com/prometheus/procfs/internal/util/parse.go @@ -0,0 +1,97 @@ +// Copyright 2018 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package util + +import ( + "io/ioutil" + "strconv" + "strings" +) + +// ParseUint32s parses a slice of strings into a slice of uint32s. +func ParseUint32s(ss []string) ([]uint32, error) { + us := make([]uint32, 0, len(ss)) + for _, s := range ss { + u, err := strconv.ParseUint(s, 10, 32) + if err != nil { + return nil, err + } + + us = append(us, uint32(u)) + } + + return us, nil +} + +// ParseUint64s parses a slice of strings into a slice of uint64s. +func ParseUint64s(ss []string) ([]uint64, error) { + us := make([]uint64, 0, len(ss)) + for _, s := range ss { + u, err := strconv.ParseUint(s, 10, 64) + if err != nil { + return nil, err + } + + us = append(us, u) + } + + return us, nil +} + +// ParsePInt64s parses a slice of strings into a slice of int64 pointers. +func ParsePInt64s(ss []string) ([]*int64, error) { + us := make([]*int64, 0, len(ss)) + for _, s := range ss { + u, err := strconv.ParseInt(s, 10, 64) + if err != nil { + return nil, err + } + + us = append(us, &u) + } + + return us, nil +} + +// ReadUintFromFile reads a file and attempts to parse a uint64 from it. +func ReadUintFromFile(path string) (uint64, error) { + data, err := ioutil.ReadFile(path) + if err != nil { + return 0, err + } + return strconv.ParseUint(strings.TrimSpace(string(data)), 10, 64) +} + +// ReadIntFromFile reads a file and attempts to parse a int64 from it. +func ReadIntFromFile(path string) (int64, error) { + data, err := ioutil.ReadFile(path) + if err != nil { + return 0, err + } + return strconv.ParseInt(strings.TrimSpace(string(data)), 10, 64) +} + +// ParseBool parses a string into a boolean pointer. +func ParseBool(b string) *bool { + var truth bool + switch b { + case "enabled": + truth = true + case "disabled": + truth = false + default: + return nil + } + return &truth +} diff --git a/vendor/github.com/prometheus/procfs/internal/util/readfile.go b/vendor/github.com/prometheus/procfs/internal/util/readfile.go new file mode 100644 index 00000000..8051161b --- /dev/null +++ b/vendor/github.com/prometheus/procfs/internal/util/readfile.go @@ -0,0 +1,38 @@ +// Copyright 2019 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package util + +import ( + "io" + "io/ioutil" + "os" +) + +// ReadFileNoStat uses ioutil.ReadAll to read contents of entire file. +// This is similar to ioutil.ReadFile but without the call to os.Stat, because +// many files in /proc and /sys report incorrect file sizes (either 0 or 4096). +// Reads a max file size of 512kB. For files larger than this, a scanner +// should be used. +func ReadFileNoStat(filename string) ([]byte, error) { + const maxBufferSize = 1024 * 512 + + f, err := os.Open(filename) + if err != nil { + return nil, err + } + defer f.Close() + + reader := io.LimitReader(f, maxBufferSize) + return ioutil.ReadAll(reader) +} diff --git a/vendor/github.com/prometheus/procfs/internal/util/sysreadfile.go b/vendor/github.com/prometheus/procfs/internal/util/sysreadfile.go new file mode 100644 index 00000000..c07de0b6 --- /dev/null +++ b/vendor/github.com/prometheus/procfs/internal/util/sysreadfile.go @@ -0,0 +1,48 @@ +// Copyright 2018 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +// +build linux,!appengine + +package util + +import ( + "bytes" + "os" + "syscall" +) + +// SysReadFile is a simplified ioutil.ReadFile that invokes syscall.Read directly. +// https://github.com/prometheus/node_exporter/pull/728/files +// +// Note that this function will not read files larger than 128 bytes. +func SysReadFile(file string) (string, error) { + f, err := os.Open(file) + if err != nil { + return "", err + } + defer f.Close() + + // On some machines, hwmon drivers are broken and return EAGAIN. This causes + // Go's ioutil.ReadFile implementation to poll forever. + // + // Since we either want to read data or bail immediately, do the simplest + // possible read using syscall directly. + const sysFileBufferSize = 128 + b := make([]byte, sysFileBufferSize) + n, err := syscall.Read(int(f.Fd()), b) + if err != nil { + return "", err + } + + return string(bytes.TrimSpace(b[:n])), nil +} diff --git a/vendor/github.com/prometheus/procfs/internal/util/sysreadfile_compat.go b/vendor/github.com/prometheus/procfs/internal/util/sysreadfile_compat.go new file mode 100644 index 00000000..bd55b453 --- /dev/null +++ b/vendor/github.com/prometheus/procfs/internal/util/sysreadfile_compat.go @@ -0,0 +1,26 @@ +// Copyright 2019 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +// +build linux,appengine !linux + +package util + +import ( + "fmt" +) + +// SysReadFile is here implemented as a noop for builds that do not support +// the read syscall. For example Windows, or Linux on Google App Engine. +func SysReadFile(file string) (string, error) { + return "", fmt.Errorf("not supported on this platform") +} diff --git a/vendor/github.com/prometheus/procfs/internal/util/valueparser.go b/vendor/github.com/prometheus/procfs/internal/util/valueparser.go new file mode 100644 index 00000000..fe2355d3 --- /dev/null +++ b/vendor/github.com/prometheus/procfs/internal/util/valueparser.go @@ -0,0 +1,91 @@ +// Copyright 2019 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package util + +import ( + "strconv" +) + +// TODO(mdlayher): util packages are an anti-pattern and this should be moved +// somewhere else that is more focused in the future. + +// A ValueParser enables parsing a single string into a variety of data types +// in a concise and safe way. The Err method must be invoked after invoking +// any other methods to ensure a value was successfully parsed. +type ValueParser struct { + v string + err error +} + +// NewValueParser creates a ValueParser using the input string. +func NewValueParser(v string) *ValueParser { + return &ValueParser{v: v} +} + +// Int interprets the underlying value as an int and returns that value. +func (vp *ValueParser) Int() int { return int(vp.int64()) } + +// PInt64 interprets the underlying value as an int64 and returns a pointer to +// that value. +func (vp *ValueParser) PInt64() *int64 { + if vp.err != nil { + return nil + } + + v := vp.int64() + return &v +} + +// int64 interprets the underlying value as an int64 and returns that value. +// TODO: export if/when necessary. +func (vp *ValueParser) int64() int64 { + if vp.err != nil { + return 0 + } + + // A base value of zero makes ParseInt infer the correct base using the + // string's prefix, if any. + const base = 0 + v, err := strconv.ParseInt(vp.v, base, 64) + if err != nil { + vp.err = err + return 0 + } + + return v +} + +// PUInt64 interprets the underlying value as an uint64 and returns a pointer to +// that value. +func (vp *ValueParser) PUInt64() *uint64 { + if vp.err != nil { + return nil + } + + // A base value of zero makes ParseInt infer the correct base using the + // string's prefix, if any. + const base = 0 + v, err := strconv.ParseUint(vp.v, base, 64) + if err != nil { + vp.err = err + return nil + } + + return &v +} + +// Err returns the last error, if any, encountered by the ValueParser. +func (vp *ValueParser) Err() error { + return vp.err +} diff --git a/vendor/github.com/prometheus/procfs/ipvs.go b/vendor/github.com/prometheus/procfs/ipvs.go new file mode 100644 index 00000000..89e44774 --- /dev/null +++ b/vendor/github.com/prometheus/procfs/ipvs.go @@ -0,0 +1,241 @@ +// Copyright 2018 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package procfs + +import ( + "bufio" + "bytes" + "encoding/hex" + "errors" + "fmt" + "io" + "io/ioutil" + "net" + "os" + "strconv" + "strings" + + "github.com/prometheus/procfs/internal/util" +) + +// IPVSStats holds IPVS statistics, as exposed by the kernel in `/proc/net/ip_vs_stats`. +type IPVSStats struct { + // Total count of connections. + Connections uint64 + // Total incoming packages processed. + IncomingPackets uint64 + // Total outgoing packages processed. + OutgoingPackets uint64 + // Total incoming traffic. + IncomingBytes uint64 + // Total outgoing traffic. + OutgoingBytes uint64 +} + +// IPVSBackendStatus holds current metrics of one virtual / real address pair. +type IPVSBackendStatus struct { + // The local (virtual) IP address. + LocalAddress net.IP + // The remote (real) IP address. + RemoteAddress net.IP + // The local (virtual) port. + LocalPort uint16 + // The remote (real) port. + RemotePort uint16 + // The local firewall mark + LocalMark string + // The transport protocol (TCP, UDP). + Proto string + // The current number of active connections for this virtual/real address pair. + ActiveConn uint64 + // The current number of inactive connections for this virtual/real address pair. + InactConn uint64 + // The current weight of this virtual/real address pair. + Weight uint64 +} + +// IPVSStats reads the IPVS statistics from the specified `proc` filesystem. +func (fs FS) IPVSStats() (IPVSStats, error) { + data, err := util.ReadFileNoStat(fs.proc.Path("net/ip_vs_stats")) + if err != nil { + return IPVSStats{}, err + } + + return parseIPVSStats(bytes.NewReader(data)) +} + +// parseIPVSStats performs the actual parsing of `ip_vs_stats`. +func parseIPVSStats(r io.Reader) (IPVSStats, error) { + var ( + statContent []byte + statLines []string + statFields []string + stats IPVSStats + ) + + statContent, err := ioutil.ReadAll(r) + if err != nil { + return IPVSStats{}, err + } + + statLines = strings.SplitN(string(statContent), "\n", 4) + if len(statLines) != 4 { + return IPVSStats{}, errors.New("ip_vs_stats corrupt: too short") + } + + statFields = strings.Fields(statLines[2]) + if len(statFields) != 5 { + return IPVSStats{}, errors.New("ip_vs_stats corrupt: unexpected number of fields") + } + + stats.Connections, err = strconv.ParseUint(statFields[0], 16, 64) + if err != nil { + return IPVSStats{}, err + } + stats.IncomingPackets, err = strconv.ParseUint(statFields[1], 16, 64) + if err != nil { + return IPVSStats{}, err + } + stats.OutgoingPackets, err = strconv.ParseUint(statFields[2], 16, 64) + if err != nil { + return IPVSStats{}, err + } + stats.IncomingBytes, err = strconv.ParseUint(statFields[3], 16, 64) + if err != nil { + return IPVSStats{}, err + } + stats.OutgoingBytes, err = strconv.ParseUint(statFields[4], 16, 64) + if err != nil { + return IPVSStats{}, err + } + + return stats, nil +} + +// IPVSBackendStatus reads and returns the status of all (virtual,real) server pairs from the specified `proc` filesystem. +func (fs FS) IPVSBackendStatus() ([]IPVSBackendStatus, error) { + file, err := os.Open(fs.proc.Path("net/ip_vs")) + if err != nil { + return nil, err + } + defer file.Close() + + return parseIPVSBackendStatus(file) +} + +func parseIPVSBackendStatus(file io.Reader) ([]IPVSBackendStatus, error) { + var ( + status []IPVSBackendStatus + scanner = bufio.NewScanner(file) + proto string + localMark string + localAddress net.IP + localPort uint16 + err error + ) + + for scanner.Scan() { + fields := strings.Fields(scanner.Text()) + if len(fields) == 0 { + continue + } + switch { + case fields[0] == "IP" || fields[0] == "Prot" || fields[1] == "RemoteAddress:Port": + continue + case fields[0] == "TCP" || fields[0] == "UDP": + if len(fields) < 2 { + continue + } + proto = fields[0] + localMark = "" + localAddress, localPort, err = parseIPPort(fields[1]) + if err != nil { + return nil, err + } + case fields[0] == "FWM": + if len(fields) < 2 { + continue + } + proto = fields[0] + localMark = fields[1] + localAddress = nil + localPort = 0 + case fields[0] == "->": + if len(fields) < 6 { + continue + } + remoteAddress, remotePort, err := parseIPPort(fields[1]) + if err != nil { + return nil, err + } + weight, err := strconv.ParseUint(fields[3], 10, 64) + if err != nil { + return nil, err + } + activeConn, err := strconv.ParseUint(fields[4], 10, 64) + if err != nil { + return nil, err + } + inactConn, err := strconv.ParseUint(fields[5], 10, 64) + if err != nil { + return nil, err + } + status = append(status, IPVSBackendStatus{ + LocalAddress: localAddress, + LocalPort: localPort, + LocalMark: localMark, + RemoteAddress: remoteAddress, + RemotePort: remotePort, + Proto: proto, + Weight: weight, + ActiveConn: activeConn, + InactConn: inactConn, + }) + } + } + return status, nil +} + +func parseIPPort(s string) (net.IP, uint16, error) { + var ( + ip net.IP + err error + ) + + switch len(s) { + case 13: + ip, err = hex.DecodeString(s[0:8]) + if err != nil { + return nil, 0, err + } + case 46: + ip = net.ParseIP(s[1:40]) + if ip == nil { + return nil, 0, fmt.Errorf("invalid IPv6 address: %s", s[1:40]) + } + default: + return nil, 0, fmt.Errorf("unexpected IP:Port: %s", s) + } + + portString := s[len(s)-4:] + if len(portString) != 4 { + return nil, 0, fmt.Errorf("unexpected port string format: %s", portString) + } + port, err := strconv.ParseUint(portString, 16, 16) + if err != nil { + return nil, 0, err + } + + return ip, uint16(port), nil +} diff --git a/vendor/github.com/prometheus/procfs/kernel_random.go b/vendor/github.com/prometheus/procfs/kernel_random.go new file mode 100644 index 00000000..da3a941d --- /dev/null +++ b/vendor/github.com/prometheus/procfs/kernel_random.go @@ -0,0 +1,62 @@ +// Copyright 2020 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +// +build !windows + +package procfs + +import ( + "os" + + "github.com/prometheus/procfs/internal/util" +) + +// KernelRandom contains information about to the kernel's random number generator. +type KernelRandom struct { + // EntropyAvaliable gives the available entropy, in bits. + EntropyAvaliable *uint64 + // PoolSize gives the size of the entropy pool, in bits. + PoolSize *uint64 + // URandomMinReseedSeconds is the number of seconds after which the DRNG will be reseeded. + URandomMinReseedSeconds *uint64 + // WriteWakeupThreshold the number of bits of entropy below which we wake up processes + // that do a select(2) or poll(2) for write access to /dev/random. + WriteWakeupThreshold *uint64 + // ReadWakeupThreshold is the number of bits of entropy required for waking up processes that sleep + // waiting for entropy from /dev/random. + ReadWakeupThreshold *uint64 +} + +// KernelRandom returns values from /proc/sys/kernel/random. +func (fs FS) KernelRandom() (KernelRandom, error) { + random := KernelRandom{} + + for file, p := range map[string]**uint64{ + "entropy_avail": &random.EntropyAvaliable, + "poolsize": &random.PoolSize, + "urandom_min_reseed_secs": &random.URandomMinReseedSeconds, + "write_wakeup_threshold": &random.WriteWakeupThreshold, + "read_wakeup_threshold": &random.ReadWakeupThreshold, + } { + val, err := util.ReadUintFromFile(fs.proc.Path("sys", "kernel", "random", file)) + if os.IsNotExist(err) { + continue + } + if err != nil { + return random, err + } + *p = &val + } + + return random, nil +} diff --git a/vendor/github.com/prometheus/procfs/loadavg.go b/vendor/github.com/prometheus/procfs/loadavg.go new file mode 100644 index 00000000..0cce190e --- /dev/null +++ b/vendor/github.com/prometheus/procfs/loadavg.go @@ -0,0 +1,62 @@ +// Copyright 2019 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package procfs + +import ( + "fmt" + "strconv" + "strings" + + "github.com/prometheus/procfs/internal/util" +) + +// LoadAvg represents an entry in /proc/loadavg +type LoadAvg struct { + Load1 float64 + Load5 float64 + Load15 float64 +} + +// LoadAvg returns loadavg from /proc. +func (fs FS) LoadAvg() (*LoadAvg, error) { + path := fs.proc.Path("loadavg") + + data, err := util.ReadFileNoStat(path) + if err != nil { + return nil, err + } + return parseLoad(data) +} + +// Parse /proc loadavg and return 1m, 5m and 15m. +func parseLoad(loadavgBytes []byte) (*LoadAvg, error) { + loads := make([]float64, 3) + parts := strings.Fields(string(loadavgBytes)) + if len(parts) < 3 { + return nil, fmt.Errorf("malformed loadavg line: too few fields in loadavg string: %q", string(loadavgBytes)) + } + + var err error + for i, load := range parts[0:3] { + loads[i], err = strconv.ParseFloat(load, 64) + if err != nil { + return nil, fmt.Errorf("could not parse load %q: %w", load, err) + } + } + return &LoadAvg{ + Load1: loads[0], + Load5: loads[1], + Load15: loads[2], + }, nil +} diff --git a/vendor/github.com/prometheus/procfs/mdstat.go b/vendor/github.com/prometheus/procfs/mdstat.go new file mode 100644 index 00000000..4c4493bf --- /dev/null +++ b/vendor/github.com/prometheus/procfs/mdstat.go @@ -0,0 +1,213 @@ +// Copyright 2018 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package procfs + +import ( + "fmt" + "io/ioutil" + "regexp" + "strconv" + "strings" +) + +var ( + statusLineRE = regexp.MustCompile(`(\d+) blocks .*\[(\d+)/(\d+)\] \[[U_]+\]`) + recoveryLineRE = regexp.MustCompile(`\((\d+)/\d+\)`) + componentDeviceRE = regexp.MustCompile(`(.*)\[\d+\]`) +) + +// MDStat holds info parsed from /proc/mdstat. +type MDStat struct { + // Name of the device. + Name string + // activity-state of the device. + ActivityState string + // Number of active disks. + DisksActive int64 + // Total number of disks the device requires. + DisksTotal int64 + // Number of failed disks. + DisksFailed int64 + // Spare disks in the device. + DisksSpare int64 + // Number of blocks the device holds. + BlocksTotal int64 + // Number of blocks on the device that are in sync. + BlocksSynced int64 + // Name of md component devices + Devices []string +} + +// MDStat parses an mdstat-file (/proc/mdstat) and returns a slice of +// structs containing the relevant info. More information available here: +// https://raid.wiki.kernel.org/index.php/Mdstat +func (fs FS) MDStat() ([]MDStat, error) { + data, err := ioutil.ReadFile(fs.proc.Path("mdstat")) + if err != nil { + return nil, err + } + mdstat, err := parseMDStat(data) + if err != nil { + return nil, fmt.Errorf("error parsing mdstat %q: %w", fs.proc.Path("mdstat"), err) + } + return mdstat, nil +} + +// parseMDStat parses data from mdstat file (/proc/mdstat) and returns a slice of +// structs containing the relevant info. +func parseMDStat(mdStatData []byte) ([]MDStat, error) { + mdStats := []MDStat{} + lines := strings.Split(string(mdStatData), "\n") + + for i, line := range lines { + if strings.TrimSpace(line) == "" || line[0] == ' ' || + strings.HasPrefix(line, "Personalities") || + strings.HasPrefix(line, "unused") { + continue + } + + deviceFields := strings.Fields(line) + if len(deviceFields) < 3 { + return nil, fmt.Errorf("not enough fields in mdline (expected at least 3): %s", line) + } + mdName := deviceFields[0] // mdx + state := deviceFields[2] // active or inactive + + if len(lines) <= i+3 { + return nil, fmt.Errorf("error parsing %q: too few lines for md device", mdName) + } + + // Failed disks have the suffix (F) & Spare disks have the suffix (S). + fail := int64(strings.Count(line, "(F)")) + spare := int64(strings.Count(line, "(S)")) + active, total, size, err := evalStatusLine(lines[i], lines[i+1]) + + if err != nil { + return nil, fmt.Errorf("error parsing md device lines: %w", err) + } + + syncLineIdx := i + 2 + if strings.Contains(lines[i+2], "bitmap") { // skip bitmap line + syncLineIdx++ + } + + // If device is syncing at the moment, get the number of currently + // synced bytes, otherwise that number equals the size of the device. + syncedBlocks := size + recovering := strings.Contains(lines[syncLineIdx], "recovery") + resyncing := strings.Contains(lines[syncLineIdx], "resync") + checking := strings.Contains(lines[syncLineIdx], "check") + + // Append recovery and resyncing state info. + if recovering || resyncing || checking { + if recovering { + state = "recovering" + } else if checking { + state = "checking" + } else { + state = "resyncing" + } + + // Handle case when resync=PENDING or resync=DELAYED. + if strings.Contains(lines[syncLineIdx], "PENDING") || + strings.Contains(lines[syncLineIdx], "DELAYED") { + syncedBlocks = 0 + } else { + syncedBlocks, err = evalRecoveryLine(lines[syncLineIdx]) + if err != nil { + return nil, fmt.Errorf("error parsing sync line in md device %q: %w", mdName, err) + } + } + } + + mdStats = append(mdStats, MDStat{ + Name: mdName, + ActivityState: state, + DisksActive: active, + DisksFailed: fail, + DisksSpare: spare, + DisksTotal: total, + BlocksTotal: size, + BlocksSynced: syncedBlocks, + Devices: evalComponentDevices(deviceFields), + }) + } + + return mdStats, nil +} + +func evalStatusLine(deviceLine, statusLine string) (active, total, size int64, err error) { + + sizeStr := strings.Fields(statusLine)[0] + size, err = strconv.ParseInt(sizeStr, 10, 64) + if err != nil { + return 0, 0, 0, fmt.Errorf("unexpected statusLine %q: %w", statusLine, err) + } + + if strings.Contains(deviceLine, "raid0") || strings.Contains(deviceLine, "linear") { + // In the device deviceLine, only disks have a number associated with them in []. + total = int64(strings.Count(deviceLine, "[")) + return total, total, size, nil + } + + if strings.Contains(deviceLine, "inactive") { + return 0, 0, size, nil + } + + matches := statusLineRE.FindStringSubmatch(statusLine) + if len(matches) != 4 { + return 0, 0, 0, fmt.Errorf("couldn't find all the substring matches: %s", statusLine) + } + + total, err = strconv.ParseInt(matches[2], 10, 64) + if err != nil { + return 0, 0, 0, fmt.Errorf("unexpected statusLine %q: %w", statusLine, err) + } + + active, err = strconv.ParseInt(matches[3], 10, 64) + if err != nil { + return 0, 0, 0, fmt.Errorf("unexpected statusLine %q: %w", statusLine, err) + } + + return active, total, size, nil +} + +func evalRecoveryLine(recoveryLine string) (syncedBlocks int64, err error) { + matches := recoveryLineRE.FindStringSubmatch(recoveryLine) + if len(matches) != 2 { + return 0, fmt.Errorf("unexpected recoveryLine: %s", recoveryLine) + } + + syncedBlocks, err = strconv.ParseInt(matches[1], 10, 64) + if err != nil { + return 0, fmt.Errorf("error parsing int from recoveryLine %q: %w", recoveryLine, err) + } + + return syncedBlocks, nil +} + +func evalComponentDevices(deviceFields []string) []string { + mdComponentDevices := make([]string, 0) + if len(deviceFields) > 3 { + for _, field := range deviceFields[4:] { + match := componentDeviceRE.FindStringSubmatch(field) + if match == nil { + continue + } + mdComponentDevices = append(mdComponentDevices, match[1]) + } + } + + return mdComponentDevices +} diff --git a/vendor/github.com/prometheus/procfs/meminfo.go b/vendor/github.com/prometheus/procfs/meminfo.go new file mode 100644 index 00000000..f65e174e --- /dev/null +++ b/vendor/github.com/prometheus/procfs/meminfo.go @@ -0,0 +1,277 @@ +// Copyright 2019 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package procfs + +import ( + "bufio" + "bytes" + "fmt" + "io" + "strconv" + "strings" + + "github.com/prometheus/procfs/internal/util" +) + +// Meminfo represents memory statistics. +type Meminfo struct { + // Total usable ram (i.e. physical ram minus a few reserved + // bits and the kernel binary code) + MemTotal *uint64 + // The sum of LowFree+HighFree + MemFree *uint64 + // An estimate of how much memory is available for starting + // new applications, without swapping. Calculated from + // MemFree, SReclaimable, the size of the file LRU lists, and + // the low watermarks in each zone. The estimate takes into + // account that the system needs some page cache to function + // well, and that not all reclaimable slab will be + // reclaimable, due to items being in use. The impact of those + // factors will vary from system to system. + MemAvailable *uint64 + // Relatively temporary storage for raw disk blocks shouldn't + // get tremendously large (20MB or so) + Buffers *uint64 + Cached *uint64 + // Memory that once was swapped out, is swapped back in but + // still also is in the swapfile (if memory is needed it + // doesn't need to be swapped out AGAIN because it is already + // in the swapfile. This saves I/O) + SwapCached *uint64 + // Memory that has been used more recently and usually not + // reclaimed unless absolutely necessary. + Active *uint64 + // Memory which has been less recently used. It is more + // eligible to be reclaimed for other purposes + Inactive *uint64 + ActiveAnon *uint64 + InactiveAnon *uint64 + ActiveFile *uint64 + InactiveFile *uint64 + Unevictable *uint64 + Mlocked *uint64 + // total amount of swap space available + SwapTotal *uint64 + // Memory which has been evicted from RAM, and is temporarily + // on the disk + SwapFree *uint64 + // Memory which is waiting to get written back to the disk + Dirty *uint64 + // Memory which is actively being written back to the disk + Writeback *uint64 + // Non-file backed pages mapped into userspace page tables + AnonPages *uint64 + // files which have been mapped, such as libraries + Mapped *uint64 + Shmem *uint64 + // in-kernel data structures cache + Slab *uint64 + // Part of Slab, that might be reclaimed, such as caches + SReclaimable *uint64 + // Part of Slab, that cannot be reclaimed on memory pressure + SUnreclaim *uint64 + KernelStack *uint64 + // amount of memory dedicated to the lowest level of page + // tables. + PageTables *uint64 + // NFS pages sent to the server, but not yet committed to + // stable storage + NFSUnstable *uint64 + // Memory used for block device "bounce buffers" + Bounce *uint64 + // Memory used by FUSE for temporary writeback buffers + WritebackTmp *uint64 + // Based on the overcommit ratio ('vm.overcommit_ratio'), + // this is the total amount of memory currently available to + // be allocated on the system. This limit is only adhered to + // if strict overcommit accounting is enabled (mode 2 in + // 'vm.overcommit_memory'). + // The CommitLimit is calculated with the following formula: + // CommitLimit = ([total RAM pages] - [total huge TLB pages]) * + // overcommit_ratio / 100 + [total swap pages] + // For example, on a system with 1G of physical RAM and 7G + // of swap with a `vm.overcommit_ratio` of 30 it would + // yield a CommitLimit of 7.3G. + // For more details, see the memory overcommit documentation + // in vm/overcommit-accounting. + CommitLimit *uint64 + // The amount of memory presently allocated on the system. + // The committed memory is a sum of all of the memory which + // has been allocated by processes, even if it has not been + // "used" by them as of yet. A process which malloc()'s 1G + // of memory, but only touches 300M of it will show up as + // using 1G. This 1G is memory which has been "committed" to + // by the VM and can be used at any time by the allocating + // application. With strict overcommit enabled on the system + // (mode 2 in 'vm.overcommit_memory'),allocations which would + // exceed the CommitLimit (detailed above) will not be permitted. + // This is useful if one needs to guarantee that processes will + // not fail due to lack of memory once that memory has been + // successfully allocated. + CommittedAS *uint64 + // total size of vmalloc memory area + VmallocTotal *uint64 + // amount of vmalloc area which is used + VmallocUsed *uint64 + // largest contiguous block of vmalloc area which is free + VmallocChunk *uint64 + HardwareCorrupted *uint64 + AnonHugePages *uint64 + ShmemHugePages *uint64 + ShmemPmdMapped *uint64 + CmaTotal *uint64 + CmaFree *uint64 + HugePagesTotal *uint64 + HugePagesFree *uint64 + HugePagesRsvd *uint64 + HugePagesSurp *uint64 + Hugepagesize *uint64 + DirectMap4k *uint64 + DirectMap2M *uint64 + DirectMap1G *uint64 +} + +// Meminfo returns an information about current kernel/system memory statistics. +// See https://www.kernel.org/doc/Documentation/filesystems/proc.txt +func (fs FS) Meminfo() (Meminfo, error) { + b, err := util.ReadFileNoStat(fs.proc.Path("meminfo")) + if err != nil { + return Meminfo{}, err + } + + m, err := parseMemInfo(bytes.NewReader(b)) + if err != nil { + return Meminfo{}, fmt.Errorf("failed to parse meminfo: %w", err) + } + + return *m, nil +} + +func parseMemInfo(r io.Reader) (*Meminfo, error) { + var m Meminfo + s := bufio.NewScanner(r) + for s.Scan() { + // Each line has at least a name and value; we ignore the unit. + fields := strings.Fields(s.Text()) + if len(fields) < 2 { + return nil, fmt.Errorf("malformed meminfo line: %q", s.Text()) + } + + v, err := strconv.ParseUint(fields[1], 0, 64) + if err != nil { + return nil, err + } + + switch fields[0] { + case "MemTotal:": + m.MemTotal = &v + case "MemFree:": + m.MemFree = &v + case "MemAvailable:": + m.MemAvailable = &v + case "Buffers:": + m.Buffers = &v + case "Cached:": + m.Cached = &v + case "SwapCached:": + m.SwapCached = &v + case "Active:": + m.Active = &v + case "Inactive:": + m.Inactive = &v + case "Active(anon):": + m.ActiveAnon = &v + case "Inactive(anon):": + m.InactiveAnon = &v + case "Active(file):": + m.ActiveFile = &v + case "Inactive(file):": + m.InactiveFile = &v + case "Unevictable:": + m.Unevictable = &v + case "Mlocked:": + m.Mlocked = &v + case "SwapTotal:": + m.SwapTotal = &v + case "SwapFree:": + m.SwapFree = &v + case "Dirty:": + m.Dirty = &v + case "Writeback:": + m.Writeback = &v + case "AnonPages:": + m.AnonPages = &v + case "Mapped:": + m.Mapped = &v + case "Shmem:": + m.Shmem = &v + case "Slab:": + m.Slab = &v + case "SReclaimable:": + m.SReclaimable = &v + case "SUnreclaim:": + m.SUnreclaim = &v + case "KernelStack:": + m.KernelStack = &v + case "PageTables:": + m.PageTables = &v + case "NFS_Unstable:": + m.NFSUnstable = &v + case "Bounce:": + m.Bounce = &v + case "WritebackTmp:": + m.WritebackTmp = &v + case "CommitLimit:": + m.CommitLimit = &v + case "Committed_AS:": + m.CommittedAS = &v + case "VmallocTotal:": + m.VmallocTotal = &v + case "VmallocUsed:": + m.VmallocUsed = &v + case "VmallocChunk:": + m.VmallocChunk = &v + case "HardwareCorrupted:": + m.HardwareCorrupted = &v + case "AnonHugePages:": + m.AnonHugePages = &v + case "ShmemHugePages:": + m.ShmemHugePages = &v + case "ShmemPmdMapped:": + m.ShmemPmdMapped = &v + case "CmaTotal:": + m.CmaTotal = &v + case "CmaFree:": + m.CmaFree = &v + case "HugePages_Total:": + m.HugePagesTotal = &v + case "HugePages_Free:": + m.HugePagesFree = &v + case "HugePages_Rsvd:": + m.HugePagesRsvd = &v + case "HugePages_Surp:": + m.HugePagesSurp = &v + case "Hugepagesize:": + m.Hugepagesize = &v + case "DirectMap4k:": + m.DirectMap4k = &v + case "DirectMap2M:": + m.DirectMap2M = &v + case "DirectMap1G:": + m.DirectMap1G = &v + } + } + + return &m, nil +} diff --git a/vendor/github.com/prometheus/procfs/mountinfo.go b/vendor/github.com/prometheus/procfs/mountinfo.go new file mode 100644 index 00000000..59f4d505 --- /dev/null +++ b/vendor/github.com/prometheus/procfs/mountinfo.go @@ -0,0 +1,180 @@ +// Copyright 2019 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package procfs + +import ( + "bufio" + "bytes" + "fmt" + "strconv" + "strings" + + "github.com/prometheus/procfs/internal/util" +) + +// A MountInfo is a type that describes the details, options +// for each mount, parsed from /proc/self/mountinfo. +// The fields described in each entry of /proc/self/mountinfo +// is described in the following man page. +// http://man7.org/linux/man-pages/man5/proc.5.html +type MountInfo struct { + // Unique ID for the mount + MountID int + // The ID of the parent mount + ParentID int + // The value of `st_dev` for the files on this FS + MajorMinorVer string + // The pathname of the directory in the FS that forms + // the root for this mount + Root string + // The pathname of the mount point relative to the root + MountPoint string + // Mount options + Options map[string]string + // Zero or more optional fields + OptionalFields map[string]string + // The Filesystem type + FSType string + // FS specific information or "none" + Source string + // Superblock options + SuperOptions map[string]string +} + +// Reads each line of the mountinfo file, and returns a list of formatted MountInfo structs. +func parseMountInfo(info []byte) ([]*MountInfo, error) { + mounts := []*MountInfo{} + scanner := bufio.NewScanner(bytes.NewReader(info)) + for scanner.Scan() { + mountString := scanner.Text() + parsedMounts, err := parseMountInfoString(mountString) + if err != nil { + return nil, err + } + mounts = append(mounts, parsedMounts) + } + + err := scanner.Err() + return mounts, err +} + +// Parses a mountinfo file line, and converts it to a MountInfo struct. +// An important check here is to see if the hyphen separator, as if it does not exist, +// it means that the line is malformed. +func parseMountInfoString(mountString string) (*MountInfo, error) { + var err error + + mountInfo := strings.Split(mountString, " ") + mountInfoLength := len(mountInfo) + if mountInfoLength < 10 { + return nil, fmt.Errorf("couldn't find enough fields in mount string: %s", mountString) + } + + if mountInfo[mountInfoLength-4] != "-" { + return nil, fmt.Errorf("couldn't find separator in expected field: %s", mountInfo[mountInfoLength-4]) + } + + mount := &MountInfo{ + MajorMinorVer: mountInfo[2], + Root: mountInfo[3], + MountPoint: mountInfo[4], + Options: mountOptionsParser(mountInfo[5]), + OptionalFields: nil, + FSType: mountInfo[mountInfoLength-3], + Source: mountInfo[mountInfoLength-2], + SuperOptions: mountOptionsParser(mountInfo[mountInfoLength-1]), + } + + mount.MountID, err = strconv.Atoi(mountInfo[0]) + if err != nil { + return nil, fmt.Errorf("failed to parse mount ID") + } + mount.ParentID, err = strconv.Atoi(mountInfo[1]) + if err != nil { + return nil, fmt.Errorf("failed to parse parent ID") + } + // Has optional fields, which is a space separated list of values. + // Example: shared:2 master:7 + if mountInfo[6] != "" { + mount.OptionalFields, err = mountOptionsParseOptionalFields(mountInfo[6 : mountInfoLength-4]) + if err != nil { + return nil, err + } + } + return mount, nil +} + +// mountOptionsIsValidField checks a string against a valid list of optional fields keys. +func mountOptionsIsValidField(s string) bool { + switch s { + case + "shared", + "master", + "propagate_from", + "unbindable": + return true + } + return false +} + +// mountOptionsParseOptionalFields parses a list of optional fields strings into a double map of strings. +func mountOptionsParseOptionalFields(o []string) (map[string]string, error) { + optionalFields := make(map[string]string) + for _, field := range o { + optionSplit := strings.SplitN(field, ":", 2) + value := "" + if len(optionSplit) == 2 { + value = optionSplit[1] + } + if mountOptionsIsValidField(optionSplit[0]) { + optionalFields[optionSplit[0]] = value + } + } + return optionalFields, nil +} + +// mountOptionsParser parses the mount options, superblock options. +func mountOptionsParser(mountOptions string) map[string]string { + opts := make(map[string]string) + options := strings.Split(mountOptions, ",") + for _, opt := range options { + splitOption := strings.Split(opt, "=") + if len(splitOption) < 2 { + key := splitOption[0] + opts[key] = "" + } else { + key, value := splitOption[0], splitOption[1] + opts[key] = value + } + } + return opts +} + +// GetMounts retrieves mountinfo information from `/proc/self/mountinfo`. +func GetMounts() ([]*MountInfo, error) { + data, err := util.ReadFileNoStat("/proc/self/mountinfo") + if err != nil { + return nil, err + } + return parseMountInfo(data) +} + +// GetProcMounts retrieves mountinfo information from a processes' `/proc//mountinfo`. +func GetProcMounts(pid int) ([]*MountInfo, error) { + data, err := util.ReadFileNoStat(fmt.Sprintf("/proc/%d/mountinfo", pid)) + if err != nil { + return nil, err + } + return parseMountInfo(data) +} diff --git a/vendor/github.com/prometheus/procfs/mountstats.go b/vendor/github.com/prometheus/procfs/mountstats.go new file mode 100644 index 00000000..f7a828bb --- /dev/null +++ b/vendor/github.com/prometheus/procfs/mountstats.go @@ -0,0 +1,638 @@ +// Copyright 2018 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package procfs + +// While implementing parsing of /proc/[pid]/mountstats, this blog was used +// heavily as a reference: +// https://utcc.utoronto.ca/~cks/space/blog/linux/NFSMountstatsIndex +// +// Special thanks to Chris Siebenmann for all of his posts explaining the +// various statistics available for NFS. + +import ( + "bufio" + "fmt" + "io" + "strconv" + "strings" + "time" +) + +// Constants shared between multiple functions. +const ( + deviceEntryLen = 8 + + fieldBytesLen = 8 + fieldEventsLen = 27 + + statVersion10 = "1.0" + statVersion11 = "1.1" + + fieldTransport10TCPLen = 10 + fieldTransport10UDPLen = 7 + + fieldTransport11TCPLen = 13 + fieldTransport11UDPLen = 10 +) + +// A Mount is a device mount parsed from /proc/[pid]/mountstats. +type Mount struct { + // Name of the device. + Device string + // The mount point of the device. + Mount string + // The filesystem type used by the device. + Type string + // If available additional statistics related to this Mount. + // Use a type assertion to determine if additional statistics are available. + Stats MountStats +} + +// A MountStats is a type which contains detailed statistics for a specific +// type of Mount. +type MountStats interface { + mountStats() +} + +// A MountStatsNFS is a MountStats implementation for NFSv3 and v4 mounts. +type MountStatsNFS struct { + // The version of statistics provided. + StatVersion string + // The mount options of the NFS mount. + Opts map[string]string + // The age of the NFS mount. + Age time.Duration + // Statistics related to byte counters for various operations. + Bytes NFSBytesStats + // Statistics related to various NFS event occurrences. + Events NFSEventsStats + // Statistics broken down by filesystem operation. + Operations []NFSOperationStats + // Statistics about the NFS RPC transport. + Transport NFSTransportStats +} + +// mountStats implements MountStats. +func (m MountStatsNFS) mountStats() {} + +// A NFSBytesStats contains statistics about the number of bytes read and written +// by an NFS client to and from an NFS server. +type NFSBytesStats struct { + // Number of bytes read using the read() syscall. + Read uint64 + // Number of bytes written using the write() syscall. + Write uint64 + // Number of bytes read using the read() syscall in O_DIRECT mode. + DirectRead uint64 + // Number of bytes written using the write() syscall in O_DIRECT mode. + DirectWrite uint64 + // Number of bytes read from the NFS server, in total. + ReadTotal uint64 + // Number of bytes written to the NFS server, in total. + WriteTotal uint64 + // Number of pages read directly via mmap()'d files. + ReadPages uint64 + // Number of pages written directly via mmap()'d files. + WritePages uint64 +} + +// A NFSEventsStats contains statistics about NFS event occurrences. +type NFSEventsStats struct { + // Number of times cached inode attributes are re-validated from the server. + InodeRevalidate uint64 + // Number of times cached dentry nodes are re-validated from the server. + DnodeRevalidate uint64 + // Number of times an inode cache is cleared. + DataInvalidate uint64 + // Number of times cached inode attributes are invalidated. + AttributeInvalidate uint64 + // Number of times files or directories have been open()'d. + VFSOpen uint64 + // Number of times a directory lookup has occurred. + VFSLookup uint64 + // Number of times permissions have been checked. + VFSAccess uint64 + // Number of updates (and potential writes) to pages. + VFSUpdatePage uint64 + // Number of pages read directly via mmap()'d files. + VFSReadPage uint64 + // Number of times a group of pages have been read. + VFSReadPages uint64 + // Number of pages written directly via mmap()'d files. + VFSWritePage uint64 + // Number of times a group of pages have been written. + VFSWritePages uint64 + // Number of times directory entries have been read with getdents(). + VFSGetdents uint64 + // Number of times attributes have been set on inodes. + VFSSetattr uint64 + // Number of pending writes that have been forcefully flushed to the server. + VFSFlush uint64 + // Number of times fsync() has been called on directories and files. + VFSFsync uint64 + // Number of times locking has been attempted on a file. + VFSLock uint64 + // Number of times files have been closed and released. + VFSFileRelease uint64 + // Unknown. Possibly unused. + CongestionWait uint64 + // Number of times files have been truncated. + Truncation uint64 + // Number of times a file has been grown due to writes beyond its existing end. + WriteExtension uint64 + // Number of times a file was removed while still open by another process. + SillyRename uint64 + // Number of times the NFS server gave less data than expected while reading. + ShortRead uint64 + // Number of times the NFS server wrote less data than expected while writing. + ShortWrite uint64 + // Number of times the NFS server indicated EJUKEBOX; retrieving data from + // offline storage. + JukeboxDelay uint64 + // Number of NFS v4.1+ pNFS reads. + PNFSRead uint64 + // Number of NFS v4.1+ pNFS writes. + PNFSWrite uint64 +} + +// A NFSOperationStats contains statistics for a single operation. +type NFSOperationStats struct { + // The name of the operation. + Operation string + // Number of requests performed for this operation. + Requests uint64 + // Number of times an actual RPC request has been transmitted for this operation. + Transmissions uint64 + // Number of times a request has had a major timeout. + MajorTimeouts uint64 + // Number of bytes sent for this operation, including RPC headers and payload. + BytesSent uint64 + // Number of bytes received for this operation, including RPC headers and payload. + BytesReceived uint64 + // Duration all requests spent queued for transmission before they were sent. + CumulativeQueueMilliseconds uint64 + // Duration it took to get a reply back after the request was transmitted. + CumulativeTotalResponseMilliseconds uint64 + // Duration from when a request was enqueued to when it was completely handled. + CumulativeTotalRequestMilliseconds uint64 + // The count of operations that complete with tk_status < 0. These statuses usually indicate error conditions. + Errors uint64 +} + +// A NFSTransportStats contains statistics for the NFS mount RPC requests and +// responses. +type NFSTransportStats struct { + // The transport protocol used for the NFS mount. + Protocol string + // The local port used for the NFS mount. + Port uint64 + // Number of times the client has had to establish a connection from scratch + // to the NFS server. + Bind uint64 + // Number of times the client has made a TCP connection to the NFS server. + Connect uint64 + // Duration (in jiffies, a kernel internal unit of time) the NFS mount has + // spent waiting for connections to the server to be established. + ConnectIdleTime uint64 + // Duration since the NFS mount last saw any RPC traffic. + IdleTimeSeconds uint64 + // Number of RPC requests for this mount sent to the NFS server. + Sends uint64 + // Number of RPC responses for this mount received from the NFS server. + Receives uint64 + // Number of times the NFS server sent a response with a transaction ID + // unknown to this client. + BadTransactionIDs uint64 + // A running counter, incremented on each request as the current difference + // ebetween sends and receives. + CumulativeActiveRequests uint64 + // A running counter, incremented on each request by the current backlog + // queue size. + CumulativeBacklog uint64 + + // Stats below only available with stat version 1.1. + + // Maximum number of simultaneously active RPC requests ever used. + MaximumRPCSlotsUsed uint64 + // A running counter, incremented on each request as the current size of the + // sending queue. + CumulativeSendingQueue uint64 + // A running counter, incremented on each request as the current size of the + // pending queue. + CumulativePendingQueue uint64 +} + +// parseMountStats parses a /proc/[pid]/mountstats file and returns a slice +// of Mount structures containing detailed information about each mount. +// If available, statistics for each mount are parsed as well. +func parseMountStats(r io.Reader) ([]*Mount, error) { + const ( + device = "device" + statVersionPrefix = "statvers=" + + nfs3Type = "nfs" + nfs4Type = "nfs4" + ) + + var mounts []*Mount + + s := bufio.NewScanner(r) + for s.Scan() { + // Only look for device entries in this function + ss := strings.Fields(string(s.Bytes())) + if len(ss) == 0 || ss[0] != device { + continue + } + + m, err := parseMount(ss) + if err != nil { + return nil, err + } + + // Does this mount also possess statistics information? + if len(ss) > deviceEntryLen { + // Only NFSv3 and v4 are supported for parsing statistics + if m.Type != nfs3Type && m.Type != nfs4Type { + return nil, fmt.Errorf("cannot parse MountStats for fstype %q", m.Type) + } + + statVersion := strings.TrimPrefix(ss[8], statVersionPrefix) + + stats, err := parseMountStatsNFS(s, statVersion) + if err != nil { + return nil, err + } + + m.Stats = stats + } + + mounts = append(mounts, m) + } + + return mounts, s.Err() +} + +// parseMount parses an entry in /proc/[pid]/mountstats in the format: +// device [device] mounted on [mount] with fstype [type] +func parseMount(ss []string) (*Mount, error) { + if len(ss) < deviceEntryLen { + return nil, fmt.Errorf("invalid device entry: %v", ss) + } + + // Check for specific words appearing at specific indices to ensure + // the format is consistent with what we expect + format := []struct { + i int + s string + }{ + {i: 0, s: "device"}, + {i: 2, s: "mounted"}, + {i: 3, s: "on"}, + {i: 5, s: "with"}, + {i: 6, s: "fstype"}, + } + + for _, f := range format { + if ss[f.i] != f.s { + return nil, fmt.Errorf("invalid device entry: %v", ss) + } + } + + return &Mount{ + Device: ss[1], + Mount: ss[4], + Type: ss[7], + }, nil +} + +// parseMountStatsNFS parses a MountStatsNFS by scanning additional information +// related to NFS statistics. +func parseMountStatsNFS(s *bufio.Scanner, statVersion string) (*MountStatsNFS, error) { + // Field indicators for parsing specific types of data + const ( + fieldOpts = "opts:" + fieldAge = "age:" + fieldBytes = "bytes:" + fieldEvents = "events:" + fieldPerOpStats = "per-op" + fieldTransport = "xprt:" + ) + + stats := &MountStatsNFS{ + StatVersion: statVersion, + } + + for s.Scan() { + ss := strings.Fields(string(s.Bytes())) + if len(ss) == 0 { + break + } + + switch ss[0] { + case fieldOpts: + if len(ss) < 2 { + return nil, fmt.Errorf("not enough information for NFS stats: %v", ss) + } + if stats.Opts == nil { + stats.Opts = map[string]string{} + } + for _, opt := range strings.Split(ss[1], ",") { + split := strings.Split(opt, "=") + if len(split) == 2 { + stats.Opts[split[0]] = split[1] + } else { + stats.Opts[opt] = "" + } + } + case fieldAge: + if len(ss) < 2 { + return nil, fmt.Errorf("not enough information for NFS stats: %v", ss) + } + // Age integer is in seconds + d, err := time.ParseDuration(ss[1] + "s") + if err != nil { + return nil, err + } + + stats.Age = d + case fieldBytes: + if len(ss) < 2 { + return nil, fmt.Errorf("not enough information for NFS stats: %v", ss) + } + bstats, err := parseNFSBytesStats(ss[1:]) + if err != nil { + return nil, err + } + + stats.Bytes = *bstats + case fieldEvents: + if len(ss) < 2 { + return nil, fmt.Errorf("not enough information for NFS stats: %v", ss) + } + estats, err := parseNFSEventsStats(ss[1:]) + if err != nil { + return nil, err + } + + stats.Events = *estats + case fieldTransport: + if len(ss) < 3 { + return nil, fmt.Errorf("not enough information for NFS transport stats: %v", ss) + } + + tstats, err := parseNFSTransportStats(ss[1:], statVersion) + if err != nil { + return nil, err + } + + stats.Transport = *tstats + } + + // When encountering "per-operation statistics", we must break this + // loop and parse them separately to ensure we can terminate parsing + // before reaching another device entry; hence why this 'if' statement + // is not just another switch case + if ss[0] == fieldPerOpStats { + break + } + } + + if err := s.Err(); err != nil { + return nil, err + } + + // NFS per-operation stats appear last before the next device entry + perOpStats, err := parseNFSOperationStats(s) + if err != nil { + return nil, err + } + + stats.Operations = perOpStats + + return stats, nil +} + +// parseNFSBytesStats parses a NFSBytesStats line using an input set of +// integer fields. +func parseNFSBytesStats(ss []string) (*NFSBytesStats, error) { + if len(ss) != fieldBytesLen { + return nil, fmt.Errorf("invalid NFS bytes stats: %v", ss) + } + + ns := make([]uint64, 0, fieldBytesLen) + for _, s := range ss { + n, err := strconv.ParseUint(s, 10, 64) + if err != nil { + return nil, err + } + + ns = append(ns, n) + } + + return &NFSBytesStats{ + Read: ns[0], + Write: ns[1], + DirectRead: ns[2], + DirectWrite: ns[3], + ReadTotal: ns[4], + WriteTotal: ns[5], + ReadPages: ns[6], + WritePages: ns[7], + }, nil +} + +// parseNFSEventsStats parses a NFSEventsStats line using an input set of +// integer fields. +func parseNFSEventsStats(ss []string) (*NFSEventsStats, error) { + if len(ss) != fieldEventsLen { + return nil, fmt.Errorf("invalid NFS events stats: %v", ss) + } + + ns := make([]uint64, 0, fieldEventsLen) + for _, s := range ss { + n, err := strconv.ParseUint(s, 10, 64) + if err != nil { + return nil, err + } + + ns = append(ns, n) + } + + return &NFSEventsStats{ + InodeRevalidate: ns[0], + DnodeRevalidate: ns[1], + DataInvalidate: ns[2], + AttributeInvalidate: ns[3], + VFSOpen: ns[4], + VFSLookup: ns[5], + VFSAccess: ns[6], + VFSUpdatePage: ns[7], + VFSReadPage: ns[8], + VFSReadPages: ns[9], + VFSWritePage: ns[10], + VFSWritePages: ns[11], + VFSGetdents: ns[12], + VFSSetattr: ns[13], + VFSFlush: ns[14], + VFSFsync: ns[15], + VFSLock: ns[16], + VFSFileRelease: ns[17], + CongestionWait: ns[18], + Truncation: ns[19], + WriteExtension: ns[20], + SillyRename: ns[21], + ShortRead: ns[22], + ShortWrite: ns[23], + JukeboxDelay: ns[24], + PNFSRead: ns[25], + PNFSWrite: ns[26], + }, nil +} + +// parseNFSOperationStats parses a slice of NFSOperationStats by scanning +// additional information about per-operation statistics until an empty +// line is reached. +func parseNFSOperationStats(s *bufio.Scanner) ([]NFSOperationStats, error) { + const ( + // Minimum number of expected fields in each per-operation statistics set + minFields = 9 + ) + + var ops []NFSOperationStats + + for s.Scan() { + ss := strings.Fields(string(s.Bytes())) + if len(ss) == 0 { + // Must break when reading a blank line after per-operation stats to + // enable top-level function to parse the next device entry + break + } + + if len(ss) < minFields { + return nil, fmt.Errorf("invalid NFS per-operations stats: %v", ss) + } + + // Skip string operation name for integers + ns := make([]uint64, 0, minFields-1) + for _, st := range ss[1:] { + n, err := strconv.ParseUint(st, 10, 64) + if err != nil { + return nil, err + } + + ns = append(ns, n) + } + + opStats := NFSOperationStats{ + Operation: strings.TrimSuffix(ss[0], ":"), + Requests: ns[0], + Transmissions: ns[1], + MajorTimeouts: ns[2], + BytesSent: ns[3], + BytesReceived: ns[4], + CumulativeQueueMilliseconds: ns[5], + CumulativeTotalResponseMilliseconds: ns[6], + CumulativeTotalRequestMilliseconds: ns[7], + } + + if len(ns) > 8 { + opStats.Errors = ns[8] + } + + ops = append(ops, opStats) + } + + return ops, s.Err() +} + +// parseNFSTransportStats parses a NFSTransportStats line using an input set of +// integer fields matched to a specific stats version. +func parseNFSTransportStats(ss []string, statVersion string) (*NFSTransportStats, error) { + // Extract the protocol field. It is the only string value in the line + protocol := ss[0] + ss = ss[1:] + + switch statVersion { + case statVersion10: + var expectedLength int + if protocol == "tcp" { + expectedLength = fieldTransport10TCPLen + } else if protocol == "udp" { + expectedLength = fieldTransport10UDPLen + } else { + return nil, fmt.Errorf("invalid NFS protocol \"%s\" in stats 1.0 statement: %v", protocol, ss) + } + if len(ss) != expectedLength { + return nil, fmt.Errorf("invalid NFS transport stats 1.0 statement: %v", ss) + } + case statVersion11: + var expectedLength int + if protocol == "tcp" { + expectedLength = fieldTransport11TCPLen + } else if protocol == "udp" { + expectedLength = fieldTransport11UDPLen + } else { + return nil, fmt.Errorf("invalid NFS protocol \"%s\" in stats 1.1 statement: %v", protocol, ss) + } + if len(ss) != expectedLength { + return nil, fmt.Errorf("invalid NFS transport stats 1.1 statement: %v", ss) + } + default: + return nil, fmt.Errorf("unrecognized NFS transport stats version: %q", statVersion) + } + + // Allocate enough for v1.1 stats since zero value for v1.1 stats will be okay + // in a v1.0 response. Since the stat length is bigger for TCP stats, we use + // the TCP length here. + // + // Note: slice length must be set to length of v1.1 stats to avoid a panic when + // only v1.0 stats are present. + // See: https://github.com/prometheus/node_exporter/issues/571. + ns := make([]uint64, fieldTransport11TCPLen) + for i, s := range ss { + n, err := strconv.ParseUint(s, 10, 64) + if err != nil { + return nil, err + } + + ns[i] = n + } + + // The fields differ depending on the transport protocol (TCP or UDP) + // From https://utcc.utoronto.ca/%7Ecks/space/blog/linux/NFSMountstatsXprt + // + // For the udp RPC transport there is no connection count, connect idle time, + // or idle time (fields #3, #4, and #5); all other fields are the same. So + // we set them to 0 here. + if protocol == "udp" { + ns = append(ns[:2], append(make([]uint64, 3), ns[2:]...)...) + } + + return &NFSTransportStats{ + Protocol: protocol, + Port: ns[0], + Bind: ns[1], + Connect: ns[2], + ConnectIdleTime: ns[3], + IdleTimeSeconds: ns[4], + Sends: ns[5], + Receives: ns[6], + BadTransactionIDs: ns[7], + CumulativeActiveRequests: ns[8], + CumulativeBacklog: ns[9], + MaximumRPCSlotsUsed: ns[10], + CumulativeSendingQueue: ns[11], + CumulativePendingQueue: ns[12], + }, nil +} diff --git a/vendor/github.com/prometheus/procfs/net_conntrackstat.go b/vendor/github.com/prometheus/procfs/net_conntrackstat.go new file mode 100644 index 00000000..9964a360 --- /dev/null +++ b/vendor/github.com/prometheus/procfs/net_conntrackstat.go @@ -0,0 +1,153 @@ +// Copyright 2020 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package procfs + +import ( + "bufio" + "bytes" + "fmt" + "io" + "strconv" + "strings" + + "github.com/prometheus/procfs/internal/util" +) + +// A ConntrackStatEntry represents one line from net/stat/nf_conntrack +// and contains netfilter conntrack statistics at one CPU core +type ConntrackStatEntry struct { + Entries uint64 + Found uint64 + Invalid uint64 + Ignore uint64 + Insert uint64 + InsertFailed uint64 + Drop uint64 + EarlyDrop uint64 + SearchRestart uint64 +} + +// ConntrackStat retrieves netfilter's conntrack statistics, split by CPU cores +func (fs FS) ConntrackStat() ([]ConntrackStatEntry, error) { + return readConntrackStat(fs.proc.Path("net", "stat", "nf_conntrack")) +} + +// Parses a slice of ConntrackStatEntries from the given filepath +func readConntrackStat(path string) ([]ConntrackStatEntry, error) { + // This file is small and can be read with one syscall. + b, err := util.ReadFileNoStat(path) + if err != nil { + // Do not wrap this error so the caller can detect os.IsNotExist and + // similar conditions. + return nil, err + } + + stat, err := parseConntrackStat(bytes.NewReader(b)) + if err != nil { + return nil, fmt.Errorf("failed to read conntrack stats from %q: %w", path, err) + } + + return stat, nil +} + +// Reads the contents of a conntrack statistics file and parses a slice of ConntrackStatEntries +func parseConntrackStat(r io.Reader) ([]ConntrackStatEntry, error) { + var entries []ConntrackStatEntry + + scanner := bufio.NewScanner(r) + scanner.Scan() + for scanner.Scan() { + fields := strings.Fields(scanner.Text()) + conntrackEntry, err := parseConntrackStatEntry(fields) + if err != nil { + return nil, err + } + entries = append(entries, *conntrackEntry) + } + + return entries, nil +} + +// Parses a ConntrackStatEntry from given array of fields +func parseConntrackStatEntry(fields []string) (*ConntrackStatEntry, error) { + if len(fields) != 17 { + return nil, fmt.Errorf("invalid conntrackstat entry, missing fields") + } + entry := &ConntrackStatEntry{} + + entries, err := parseConntrackStatField(fields[0]) + if err != nil { + return nil, err + } + entry.Entries = entries + + found, err := parseConntrackStatField(fields[2]) + if err != nil { + return nil, err + } + entry.Found = found + + invalid, err := parseConntrackStatField(fields[4]) + if err != nil { + return nil, err + } + entry.Invalid = invalid + + ignore, err := parseConntrackStatField(fields[5]) + if err != nil { + return nil, err + } + entry.Ignore = ignore + + insert, err := parseConntrackStatField(fields[8]) + if err != nil { + return nil, err + } + entry.Insert = insert + + insertFailed, err := parseConntrackStatField(fields[9]) + if err != nil { + return nil, err + } + entry.InsertFailed = insertFailed + + drop, err := parseConntrackStatField(fields[10]) + if err != nil { + return nil, err + } + entry.Drop = drop + + earlyDrop, err := parseConntrackStatField(fields[11]) + if err != nil { + return nil, err + } + entry.EarlyDrop = earlyDrop + + searchRestart, err := parseConntrackStatField(fields[16]) + if err != nil { + return nil, err + } + entry.SearchRestart = searchRestart + + return entry, nil +} + +// Parses a uint64 from given hex in string +func parseConntrackStatField(field string) (uint64, error) { + val, err := strconv.ParseUint(field, 16, 64) + if err != nil { + return 0, fmt.Errorf("couldn't parse %q field: %w", field, err) + } + return val, err +} diff --git a/vendor/github.com/prometheus/procfs/net_dev.go b/vendor/github.com/prometheus/procfs/net_dev.go new file mode 100644 index 00000000..47a710be --- /dev/null +++ b/vendor/github.com/prometheus/procfs/net_dev.go @@ -0,0 +1,205 @@ +// Copyright 2018 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package procfs + +import ( + "bufio" + "errors" + "os" + "sort" + "strconv" + "strings" +) + +// NetDevLine is single line parsed from /proc/net/dev or /proc/[pid]/net/dev. +type NetDevLine struct { + Name string `json:"name"` // The name of the interface. + RxBytes uint64 `json:"rx_bytes"` // Cumulative count of bytes received. + RxPackets uint64 `json:"rx_packets"` // Cumulative count of packets received. + RxErrors uint64 `json:"rx_errors"` // Cumulative count of receive errors encountered. + RxDropped uint64 `json:"rx_dropped"` // Cumulative count of packets dropped while receiving. + RxFIFO uint64 `json:"rx_fifo"` // Cumulative count of FIFO buffer errors. + RxFrame uint64 `json:"rx_frame"` // Cumulative count of packet framing errors. + RxCompressed uint64 `json:"rx_compressed"` // Cumulative count of compressed packets received by the device driver. + RxMulticast uint64 `json:"rx_multicast"` // Cumulative count of multicast frames received by the device driver. + TxBytes uint64 `json:"tx_bytes"` // Cumulative count of bytes transmitted. + TxPackets uint64 `json:"tx_packets"` // Cumulative count of packets transmitted. + TxErrors uint64 `json:"tx_errors"` // Cumulative count of transmit errors encountered. + TxDropped uint64 `json:"tx_dropped"` // Cumulative count of packets dropped while transmitting. + TxFIFO uint64 `json:"tx_fifo"` // Cumulative count of FIFO buffer errors. + TxCollisions uint64 `json:"tx_collisions"` // Cumulative count of collisions detected on the interface. + TxCarrier uint64 `json:"tx_carrier"` // Cumulative count of carrier losses detected by the device driver. + TxCompressed uint64 `json:"tx_compressed"` // Cumulative count of compressed packets transmitted by the device driver. +} + +// NetDev is parsed from /proc/net/dev or /proc/[pid]/net/dev. The map keys +// are interface names. +type NetDev map[string]NetDevLine + +// NetDev returns kernel/system statistics read from /proc/net/dev. +func (fs FS) NetDev() (NetDev, error) { + return newNetDev(fs.proc.Path("net/dev")) +} + +// NetDev returns kernel/system statistics read from /proc/[pid]/net/dev. +func (p Proc) NetDev() (NetDev, error) { + return newNetDev(p.path("net/dev")) +} + +// newNetDev creates a new NetDev from the contents of the given file. +func newNetDev(file string) (NetDev, error) { + f, err := os.Open(file) + if err != nil { + return NetDev{}, err + } + defer f.Close() + + netDev := NetDev{} + s := bufio.NewScanner(f) + for n := 0; s.Scan(); n++ { + // Skip the 2 header lines. + if n < 2 { + continue + } + + line, err := netDev.parseLine(s.Text()) + if err != nil { + return netDev, err + } + + netDev[line.Name] = *line + } + + return netDev, s.Err() +} + +// parseLine parses a single line from the /proc/net/dev file. Header lines +// must be filtered prior to calling this method. +func (netDev NetDev) parseLine(rawLine string) (*NetDevLine, error) { + parts := strings.SplitN(rawLine, ":", 2) + if len(parts) != 2 { + return nil, errors.New("invalid net/dev line, missing colon") + } + fields := strings.Fields(strings.TrimSpace(parts[1])) + + var err error + line := &NetDevLine{} + + // Interface Name + line.Name = strings.TrimSpace(parts[0]) + if line.Name == "" { + return nil, errors.New("invalid net/dev line, empty interface name") + } + + // RX + line.RxBytes, err = strconv.ParseUint(fields[0], 10, 64) + if err != nil { + return nil, err + } + line.RxPackets, err = strconv.ParseUint(fields[1], 10, 64) + if err != nil { + return nil, err + } + line.RxErrors, err = strconv.ParseUint(fields[2], 10, 64) + if err != nil { + return nil, err + } + line.RxDropped, err = strconv.ParseUint(fields[3], 10, 64) + if err != nil { + return nil, err + } + line.RxFIFO, err = strconv.ParseUint(fields[4], 10, 64) + if err != nil { + return nil, err + } + line.RxFrame, err = strconv.ParseUint(fields[5], 10, 64) + if err != nil { + return nil, err + } + line.RxCompressed, err = strconv.ParseUint(fields[6], 10, 64) + if err != nil { + return nil, err + } + line.RxMulticast, err = strconv.ParseUint(fields[7], 10, 64) + if err != nil { + return nil, err + } + + // TX + line.TxBytes, err = strconv.ParseUint(fields[8], 10, 64) + if err != nil { + return nil, err + } + line.TxPackets, err = strconv.ParseUint(fields[9], 10, 64) + if err != nil { + return nil, err + } + line.TxErrors, err = strconv.ParseUint(fields[10], 10, 64) + if err != nil { + return nil, err + } + line.TxDropped, err = strconv.ParseUint(fields[11], 10, 64) + if err != nil { + return nil, err + } + line.TxFIFO, err = strconv.ParseUint(fields[12], 10, 64) + if err != nil { + return nil, err + } + line.TxCollisions, err = strconv.ParseUint(fields[13], 10, 64) + if err != nil { + return nil, err + } + line.TxCarrier, err = strconv.ParseUint(fields[14], 10, 64) + if err != nil { + return nil, err + } + line.TxCompressed, err = strconv.ParseUint(fields[15], 10, 64) + if err != nil { + return nil, err + } + + return line, nil +} + +// Total aggregates the values across interfaces and returns a new NetDevLine. +// The Name field will be a sorted comma separated list of interface names. +func (netDev NetDev) Total() NetDevLine { + total := NetDevLine{} + + names := make([]string, 0, len(netDev)) + for _, ifc := range netDev { + names = append(names, ifc.Name) + total.RxBytes += ifc.RxBytes + total.RxPackets += ifc.RxPackets + total.RxErrors += ifc.RxErrors + total.RxDropped += ifc.RxDropped + total.RxFIFO += ifc.RxFIFO + total.RxFrame += ifc.RxFrame + total.RxCompressed += ifc.RxCompressed + total.RxMulticast += ifc.RxMulticast + total.TxBytes += ifc.TxBytes + total.TxPackets += ifc.TxPackets + total.TxErrors += ifc.TxErrors + total.TxDropped += ifc.TxDropped + total.TxFIFO += ifc.TxFIFO + total.TxCollisions += ifc.TxCollisions + total.TxCarrier += ifc.TxCarrier + total.TxCompressed += ifc.TxCompressed + } + sort.Strings(names) + total.Name = strings.Join(names, ", ") + + return total +} diff --git a/vendor/github.com/prometheus/procfs/net_ip_socket.go b/vendor/github.com/prometheus/procfs/net_ip_socket.go new file mode 100644 index 00000000..ac01dd84 --- /dev/null +++ b/vendor/github.com/prometheus/procfs/net_ip_socket.go @@ -0,0 +1,220 @@ +// Copyright 2020 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package procfs + +import ( + "bufio" + "encoding/hex" + "fmt" + "io" + "net" + "os" + "strconv" + "strings" +) + +const ( + // readLimit is used by io.LimitReader while reading the content of the + // /proc/net/udp{,6} files. The number of lines inside such a file is dynamic + // as each line represents a single used socket. + // In theory, the number of available sockets is 65535 (2^16 - 1) per IP. + // With e.g. 150 Byte per line and the maximum number of 65535, + // the reader needs to handle 150 Byte * 65535 =~ 10 MB for a single IP. + readLimit = 4294967296 // Byte -> 4 GiB +) + +// this contains generic data structures for both udp and tcp sockets +type ( + // NetIPSocket represents the contents of /proc/net/{t,u}dp{,6} file without the header. + NetIPSocket []*netIPSocketLine + + // NetIPSocketSummary provides already computed values like the total queue lengths or + // the total number of used sockets. In contrast to NetIPSocket it does not collect + // the parsed lines into a slice. + NetIPSocketSummary struct { + // TxQueueLength shows the total queue length of all parsed tx_queue lengths. + TxQueueLength uint64 + // RxQueueLength shows the total queue length of all parsed rx_queue lengths. + RxQueueLength uint64 + // UsedSockets shows the total number of parsed lines representing the + // number of used sockets. + UsedSockets uint64 + } + + // netIPSocketLine represents the fields parsed from a single line + // in /proc/net/{t,u}dp{,6}. Fields which are not used by IPSocket are skipped. + // For the proc file format details, see https://linux.die.net/man/5/proc. + netIPSocketLine struct { + Sl uint64 + LocalAddr net.IP + LocalPort uint64 + RemAddr net.IP + RemPort uint64 + St uint64 + TxQueue uint64 + RxQueue uint64 + UID uint64 + } +) + +func newNetIPSocket(file string) (NetIPSocket, error) { + f, err := os.Open(file) + if err != nil { + return nil, err + } + defer f.Close() + + var netIPSocket NetIPSocket + + lr := io.LimitReader(f, readLimit) + s := bufio.NewScanner(lr) + s.Scan() // skip first line with headers + for s.Scan() { + fields := strings.Fields(s.Text()) + line, err := parseNetIPSocketLine(fields) + if err != nil { + return nil, err + } + netIPSocket = append(netIPSocket, line) + } + if err := s.Err(); err != nil { + return nil, err + } + return netIPSocket, nil +} + +// newNetIPSocketSummary creates a new NetIPSocket{,6} from the contents of the given file. +func newNetIPSocketSummary(file string) (*NetIPSocketSummary, error) { + f, err := os.Open(file) + if err != nil { + return nil, err + } + defer f.Close() + + var netIPSocketSummary NetIPSocketSummary + + lr := io.LimitReader(f, readLimit) + s := bufio.NewScanner(lr) + s.Scan() // skip first line with headers + for s.Scan() { + fields := strings.Fields(s.Text()) + line, err := parseNetIPSocketLine(fields) + if err != nil { + return nil, err + } + netIPSocketSummary.TxQueueLength += line.TxQueue + netIPSocketSummary.RxQueueLength += line.RxQueue + netIPSocketSummary.UsedSockets++ + } + if err := s.Err(); err != nil { + return nil, err + } + return &netIPSocketSummary, nil +} + +// the /proc/net/{t,u}dp{,6} files are network byte order for ipv4 and for ipv6 the address is four words consisting of four bytes each. In each of those four words the four bytes are written in reverse order. + +func parseIP(hexIP string) (net.IP, error) { + var byteIP []byte + byteIP, err := hex.DecodeString(hexIP) + if err != nil { + return nil, fmt.Errorf("cannot parse address field in socket line %q", hexIP) + } + switch len(byteIP) { + case 4: + return net.IP{byteIP[3], byteIP[2], byteIP[1], byteIP[0]}, nil + case 16: + i := net.IP{ + byteIP[3], byteIP[2], byteIP[1], byteIP[0], + byteIP[7], byteIP[6], byteIP[5], byteIP[4], + byteIP[11], byteIP[10], byteIP[9], byteIP[8], + byteIP[15], byteIP[14], byteIP[13], byteIP[12], + } + return i, nil + default: + return nil, fmt.Errorf("Unable to parse IP %s", hexIP) + } +} + +// parseNetIPSocketLine parses a single line, represented by a list of fields. +func parseNetIPSocketLine(fields []string) (*netIPSocketLine, error) { + line := &netIPSocketLine{} + if len(fields) < 8 { + return nil, fmt.Errorf( + "cannot parse net socket line as it has less then 8 columns %q", + strings.Join(fields, " "), + ) + } + var err error // parse error + + // sl + s := strings.Split(fields[0], ":") + if len(s) != 2 { + return nil, fmt.Errorf("cannot parse sl field in socket line %q", fields[0]) + } + + if line.Sl, err = strconv.ParseUint(s[0], 0, 64); err != nil { + return nil, fmt.Errorf("cannot parse sl value in socket line: %w", err) + } + // local_address + l := strings.Split(fields[1], ":") + if len(l) != 2 { + return nil, fmt.Errorf("cannot parse local_address field in socket line %q", fields[1]) + } + if line.LocalAddr, err = parseIP(l[0]); err != nil { + return nil, err + } + if line.LocalPort, err = strconv.ParseUint(l[1], 16, 64); err != nil { + return nil, fmt.Errorf("cannot parse local_address port value in socket line: %w", err) + } + + // remote_address + r := strings.Split(fields[2], ":") + if len(r) != 2 { + return nil, fmt.Errorf("cannot parse rem_address field in socket line %q", fields[1]) + } + if line.RemAddr, err = parseIP(r[0]); err != nil { + return nil, err + } + if line.RemPort, err = strconv.ParseUint(r[1], 16, 64); err != nil { + return nil, fmt.Errorf("cannot parse rem_address port value in socket line: %w", err) + } + + // st + if line.St, err = strconv.ParseUint(fields[3], 16, 64); err != nil { + return nil, fmt.Errorf("cannot parse st value in socket line: %w", err) + } + + // tx_queue and rx_queue + q := strings.Split(fields[4], ":") + if len(q) != 2 { + return nil, fmt.Errorf( + "cannot parse tx/rx queues in socket line as it has a missing colon %q", + fields[4], + ) + } + if line.TxQueue, err = strconv.ParseUint(q[0], 16, 64); err != nil { + return nil, fmt.Errorf("cannot parse tx_queue value in socket line: %w", err) + } + if line.RxQueue, err = strconv.ParseUint(q[1], 16, 64); err != nil { + return nil, fmt.Errorf("cannot parse rx_queue value in socket line: %w", err) + } + + // uid + if line.UID, err = strconv.ParseUint(fields[7], 0, 64); err != nil { + return nil, fmt.Errorf("cannot parse uid value in socket line: %w", err) + } + + return line, nil +} diff --git a/vendor/github.com/prometheus/procfs/net_protocols.go b/vendor/github.com/prometheus/procfs/net_protocols.go new file mode 100644 index 00000000..8c6de379 --- /dev/null +++ b/vendor/github.com/prometheus/procfs/net_protocols.go @@ -0,0 +1,180 @@ +// Copyright 2020 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package procfs + +import ( + "bufio" + "bytes" + "fmt" + "strconv" + "strings" + + "github.com/prometheus/procfs/internal/util" +) + +// NetProtocolStats stores the contents from /proc/net/protocols +type NetProtocolStats map[string]NetProtocolStatLine + +// NetProtocolStatLine contains a single line parsed from /proc/net/protocols. We +// only care about the first six columns as the rest are not likely to change +// and only serve to provide a set of capabilities for each protocol. +type NetProtocolStatLine struct { + Name string // 0 The name of the protocol + Size uint64 // 1 The size, in bytes, of a given protocol structure. e.g. sizeof(struct tcp_sock) or sizeof(struct unix_sock) + Sockets int64 // 2 Number of sockets in use by this protocol + Memory int64 // 3 Number of 4KB pages allocated by all sockets of this protocol + Pressure int // 4 This is either yes, no, or NI (not implemented). For the sake of simplicity we treat NI as not experiencing memory pressure. + MaxHeader uint64 // 5 Protocol specific max header size + Slab bool // 6 Indicates whether or not memory is allocated from the SLAB + ModuleName string // 7 The name of the module that implemented this protocol or "kernel" if not from a module + Capabilities NetProtocolCapabilities +} + +// NetProtocolCapabilities contains a list of capabilities for each protocol +type NetProtocolCapabilities struct { + Close bool // 8 + Connect bool // 9 + Disconnect bool // 10 + Accept bool // 11 + IoCtl bool // 12 + Init bool // 13 + Destroy bool // 14 + Shutdown bool // 15 + SetSockOpt bool // 16 + GetSockOpt bool // 17 + SendMsg bool // 18 + RecvMsg bool // 19 + SendPage bool // 20 + Bind bool // 21 + BacklogRcv bool // 22 + Hash bool // 23 + UnHash bool // 24 + GetPort bool // 25 + EnterMemoryPressure bool // 26 +} + +// NetProtocols reads stats from /proc/net/protocols and returns a map of +// PortocolStatLine entries. As of this writing no official Linux Documentation +// exists, however the source is fairly self-explanatory and the format seems +// stable since its introduction in 2.6.12-rc2 +// Linux 2.6.12-rc2 - https://elixir.bootlin.com/linux/v2.6.12-rc2/source/net/core/sock.c#L1452 +// Linux 5.10 - https://elixir.bootlin.com/linux/v5.10.4/source/net/core/sock.c#L3586 +func (fs FS) NetProtocols() (NetProtocolStats, error) { + data, err := util.ReadFileNoStat(fs.proc.Path("net/protocols")) + if err != nil { + return NetProtocolStats{}, err + } + return parseNetProtocols(bufio.NewScanner(bytes.NewReader(data))) +} + +func parseNetProtocols(s *bufio.Scanner) (NetProtocolStats, error) { + nps := NetProtocolStats{} + + // Skip the header line + s.Scan() + + for s.Scan() { + line, err := nps.parseLine(s.Text()) + if err != nil { + return NetProtocolStats{}, err + } + + nps[line.Name] = *line + } + return nps, nil +} + +func (ps NetProtocolStats) parseLine(rawLine string) (*NetProtocolStatLine, error) { + line := &NetProtocolStatLine{Capabilities: NetProtocolCapabilities{}} + var err error + const enabled = "yes" + const disabled = "no" + + fields := strings.Fields(rawLine) + line.Name = fields[0] + line.Size, err = strconv.ParseUint(fields[1], 10, 64) + if err != nil { + return nil, err + } + line.Sockets, err = strconv.ParseInt(fields[2], 10, 64) + if err != nil { + return nil, err + } + line.Memory, err = strconv.ParseInt(fields[3], 10, 64) + if err != nil { + return nil, err + } + if fields[4] == enabled { + line.Pressure = 1 + } else if fields[4] == disabled { + line.Pressure = 0 + } else { + line.Pressure = -1 + } + line.MaxHeader, err = strconv.ParseUint(fields[5], 10, 64) + if err != nil { + return nil, err + } + if fields[6] == enabled { + line.Slab = true + } else if fields[6] == disabled { + line.Slab = false + } else { + return nil, fmt.Errorf("unable to parse capability for protocol: %s", line.Name) + } + line.ModuleName = fields[7] + + err = line.Capabilities.parseCapabilities(fields[8:]) + if err != nil { + return nil, err + } + + return line, nil +} + +func (pc *NetProtocolCapabilities) parseCapabilities(capabilities []string) error { + // The capabilities are all bools so we can loop over to map them + capabilityFields := [...]*bool{ + &pc.Close, + &pc.Connect, + &pc.Disconnect, + &pc.Accept, + &pc.IoCtl, + &pc.Init, + &pc.Destroy, + &pc.Shutdown, + &pc.SetSockOpt, + &pc.GetSockOpt, + &pc.SendMsg, + &pc.RecvMsg, + &pc.SendPage, + &pc.Bind, + &pc.BacklogRcv, + &pc.Hash, + &pc.UnHash, + &pc.GetPort, + &pc.EnterMemoryPressure, + } + + for i := 0; i < len(capabilities); i++ { + if capabilities[i] == "y" { + *capabilityFields[i] = true + } else if capabilities[i] == "n" { + *capabilityFields[i] = false + } else { + return fmt.Errorf("unable to parse capability block for protocol: position %d", i) + } + } + return nil +} diff --git a/vendor/github.com/prometheus/procfs/net_sockstat.go b/vendor/github.com/prometheus/procfs/net_sockstat.go new file mode 100644 index 00000000..e36f4872 --- /dev/null +++ b/vendor/github.com/prometheus/procfs/net_sockstat.go @@ -0,0 +1,163 @@ +// Copyright 2019 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package procfs + +import ( + "bufio" + "bytes" + "errors" + "fmt" + "io" + "strings" + + "github.com/prometheus/procfs/internal/util" +) + +// A NetSockstat contains the output of /proc/net/sockstat{,6} for IPv4 or IPv6, +// respectively. +type NetSockstat struct { + // Used is non-nil for IPv4 sockstat results, but nil for IPv6. + Used *int + Protocols []NetSockstatProtocol +} + +// A NetSockstatProtocol contains statistics about a given socket protocol. +// Pointer fields indicate that the value may or may not be present on any +// given protocol. +type NetSockstatProtocol struct { + Protocol string + InUse int + Orphan *int + TW *int + Alloc *int + Mem *int + Memory *int +} + +// NetSockstat retrieves IPv4 socket statistics. +func (fs FS) NetSockstat() (*NetSockstat, error) { + return readSockstat(fs.proc.Path("net", "sockstat")) +} + +// NetSockstat6 retrieves IPv6 socket statistics. +// +// If IPv6 is disabled on this kernel, the returned error can be checked with +// os.IsNotExist. +func (fs FS) NetSockstat6() (*NetSockstat, error) { + return readSockstat(fs.proc.Path("net", "sockstat6")) +} + +// readSockstat opens and parses a NetSockstat from the input file. +func readSockstat(name string) (*NetSockstat, error) { + // This file is small and can be read with one syscall. + b, err := util.ReadFileNoStat(name) + if err != nil { + // Do not wrap this error so the caller can detect os.IsNotExist and + // similar conditions. + return nil, err + } + + stat, err := parseSockstat(bytes.NewReader(b)) + if err != nil { + return nil, fmt.Errorf("failed to read sockstats from %q: %w", name, err) + } + + return stat, nil +} + +// parseSockstat reads the contents of a sockstat file and parses a NetSockstat. +func parseSockstat(r io.Reader) (*NetSockstat, error) { + var stat NetSockstat + s := bufio.NewScanner(r) + for s.Scan() { + // Expect a minimum of a protocol and one key/value pair. + fields := strings.Split(s.Text(), " ") + if len(fields) < 3 { + return nil, fmt.Errorf("malformed sockstat line: %q", s.Text()) + } + + // The remaining fields are key/value pairs. + kvs, err := parseSockstatKVs(fields[1:]) + if err != nil { + return nil, fmt.Errorf("error parsing sockstat key/value pairs from %q: %w", s.Text(), err) + } + + // The first field is the protocol. We must trim its colon suffix. + proto := strings.TrimSuffix(fields[0], ":") + switch proto { + case "sockets": + // Special case: IPv4 has a sockets "used" key/value pair that we + // embed at the top level of the structure. + used := kvs["used"] + stat.Used = &used + default: + // Parse all other lines as individual protocols. + nsp := parseSockstatProtocol(kvs) + nsp.Protocol = proto + stat.Protocols = append(stat.Protocols, nsp) + } + } + + if err := s.Err(); err != nil { + return nil, err + } + + return &stat, nil +} + +// parseSockstatKVs parses a string slice into a map of key/value pairs. +func parseSockstatKVs(kvs []string) (map[string]int, error) { + if len(kvs)%2 != 0 { + return nil, errors.New("odd number of fields in key/value pairs") + } + + // Iterate two values at a time to gather key/value pairs. + out := make(map[string]int, len(kvs)/2) + for i := 0; i < len(kvs); i += 2 { + vp := util.NewValueParser(kvs[i+1]) + out[kvs[i]] = vp.Int() + + if err := vp.Err(); err != nil { + return nil, err + } + } + + return out, nil +} + +// parseSockstatProtocol parses a NetSockstatProtocol from the input kvs map. +func parseSockstatProtocol(kvs map[string]int) NetSockstatProtocol { + var nsp NetSockstatProtocol + for k, v := range kvs { + // Capture the range variable to ensure we get unique pointers for + // each of the optional fields. + v := v + switch k { + case "inuse": + nsp.InUse = v + case "orphan": + nsp.Orphan = &v + case "tw": + nsp.TW = &v + case "alloc": + nsp.Alloc = &v + case "mem": + nsp.Mem = &v + case "memory": + nsp.Memory = &v + } + } + + return nsp +} diff --git a/vendor/github.com/prometheus/procfs/net_softnet.go b/vendor/github.com/prometheus/procfs/net_softnet.go new file mode 100644 index 00000000..46f12c61 --- /dev/null +++ b/vendor/github.com/prometheus/procfs/net_softnet.go @@ -0,0 +1,102 @@ +// Copyright 2019 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package procfs + +import ( + "bufio" + "bytes" + "fmt" + "io" + "strconv" + "strings" + + "github.com/prometheus/procfs/internal/util" +) + +// For the proc file format details, +// See: +// * Linux 2.6.23 https://elixir.bootlin.com/linux/v2.6.23/source/net/core/dev.c#L2343 +// * Linux 4.17 https://elixir.bootlin.com/linux/v4.17/source/net/core/net-procfs.c#L162 +// and https://elixir.bootlin.com/linux/v4.17/source/include/linux/netdevice.h#L2810. + +// SoftnetStat contains a single row of data from /proc/net/softnet_stat +type SoftnetStat struct { + // Number of processed packets + Processed uint32 + // Number of dropped packets + Dropped uint32 + // Number of times processing packets ran out of quota + TimeSqueezed uint32 +} + +var softNetProcFile = "net/softnet_stat" + +// NetSoftnetStat reads data from /proc/net/softnet_stat. +func (fs FS) NetSoftnetStat() ([]SoftnetStat, error) { + b, err := util.ReadFileNoStat(fs.proc.Path(softNetProcFile)) + if err != nil { + return nil, err + } + + entries, err := parseSoftnet(bytes.NewReader(b)) + if err != nil { + return nil, fmt.Errorf("failed to parse /proc/net/softnet_stat: %w", err) + } + + return entries, nil +} + +func parseSoftnet(r io.Reader) ([]SoftnetStat, error) { + const minColumns = 9 + + s := bufio.NewScanner(r) + + var stats []SoftnetStat + for s.Scan() { + columns := strings.Fields(s.Text()) + width := len(columns) + + if width < minColumns { + return nil, fmt.Errorf("%d columns were detected, but at least %d were expected", width, minColumns) + } + + // We only parse the first three columns at the moment. + us, err := parseHexUint32s(columns[0:3]) + if err != nil { + return nil, err + } + + stats = append(stats, SoftnetStat{ + Processed: us[0], + Dropped: us[1], + TimeSqueezed: us[2], + }) + } + + return stats, nil +} + +func parseHexUint32s(ss []string) ([]uint32, error) { + us := make([]uint32, 0, len(ss)) + for _, s := range ss { + u, err := strconv.ParseUint(s, 16, 32) + if err != nil { + return nil, err + } + + us = append(us, uint32(u)) + } + + return us, nil +} diff --git a/vendor/github.com/prometheus/procfs/net_tcp.go b/vendor/github.com/prometheus/procfs/net_tcp.go new file mode 100644 index 00000000..52776295 --- /dev/null +++ b/vendor/github.com/prometheus/procfs/net_tcp.go @@ -0,0 +1,64 @@ +// Copyright 2020 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package procfs + +type ( + // NetTCP represents the contents of /proc/net/tcp{,6} file without the header. + NetTCP []*netIPSocketLine + + // NetTCPSummary provides already computed values like the total queue lengths or + // the total number of used sockets. In contrast to NetTCP it does not collect + // the parsed lines into a slice. + NetTCPSummary NetIPSocketSummary +) + +// NetTCP returns the IPv4 kernel/networking statistics for TCP datagrams +// read from /proc/net/tcp. +func (fs FS) NetTCP() (NetTCP, error) { + return newNetTCP(fs.proc.Path("net/tcp")) +} + +// NetTCP6 returns the IPv6 kernel/networking statistics for TCP datagrams +// read from /proc/net/tcp6. +func (fs FS) NetTCP6() (NetTCP, error) { + return newNetTCP(fs.proc.Path("net/tcp6")) +} + +// NetTCPSummary returns already computed statistics like the total queue lengths +// for TCP datagrams read from /proc/net/tcp. +func (fs FS) NetTCPSummary() (*NetTCPSummary, error) { + return newNetTCPSummary(fs.proc.Path("net/tcp")) +} + +// NetTCP6Summary returns already computed statistics like the total queue lengths +// for TCP datagrams read from /proc/net/tcp6. +func (fs FS) NetTCP6Summary() (*NetTCPSummary, error) { + return newNetTCPSummary(fs.proc.Path("net/tcp6")) +} + +// newNetTCP creates a new NetTCP{,6} from the contents of the given file. +func newNetTCP(file string) (NetTCP, error) { + n, err := newNetIPSocket(file) + n1 := NetTCP(n) + return n1, err +} + +func newNetTCPSummary(file string) (*NetTCPSummary, error) { + n, err := newNetIPSocketSummary(file) + if n == nil { + return nil, err + } + n1 := NetTCPSummary(*n) + return &n1, err +} diff --git a/vendor/github.com/prometheus/procfs/net_udp.go b/vendor/github.com/prometheus/procfs/net_udp.go new file mode 100644 index 00000000..9ac3daf2 --- /dev/null +++ b/vendor/github.com/prometheus/procfs/net_udp.go @@ -0,0 +1,64 @@ +// Copyright 2020 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package procfs + +type ( + // NetUDP represents the contents of /proc/net/udp{,6} file without the header. + NetUDP []*netIPSocketLine + + // NetUDPSummary provides already computed values like the total queue lengths or + // the total number of used sockets. In contrast to NetUDP it does not collect + // the parsed lines into a slice. + NetUDPSummary NetIPSocketSummary +) + +// NetUDP returns the IPv4 kernel/networking statistics for UDP datagrams +// read from /proc/net/udp. +func (fs FS) NetUDP() (NetUDP, error) { + return newNetUDP(fs.proc.Path("net/udp")) +} + +// NetUDP6 returns the IPv6 kernel/networking statistics for UDP datagrams +// read from /proc/net/udp6. +func (fs FS) NetUDP6() (NetUDP, error) { + return newNetUDP(fs.proc.Path("net/udp6")) +} + +// NetUDPSummary returns already computed statistics like the total queue lengths +// for UDP datagrams read from /proc/net/udp. +func (fs FS) NetUDPSummary() (*NetUDPSummary, error) { + return newNetUDPSummary(fs.proc.Path("net/udp")) +} + +// NetUDP6Summary returns already computed statistics like the total queue lengths +// for UDP datagrams read from /proc/net/udp6. +func (fs FS) NetUDP6Summary() (*NetUDPSummary, error) { + return newNetUDPSummary(fs.proc.Path("net/udp6")) +} + +// newNetUDP creates a new NetUDP{,6} from the contents of the given file. +func newNetUDP(file string) (NetUDP, error) { + n, err := newNetIPSocket(file) + n1 := NetUDP(n) + return n1, err +} + +func newNetUDPSummary(file string) (*NetUDPSummary, error) { + n, err := newNetIPSocketSummary(file) + if n == nil { + return nil, err + } + n1 := NetUDPSummary(*n) + return &n1, err +} diff --git a/vendor/github.com/prometheus/procfs/net_unix.go b/vendor/github.com/prometheus/procfs/net_unix.go new file mode 100644 index 00000000..98aa8e1c --- /dev/null +++ b/vendor/github.com/prometheus/procfs/net_unix.go @@ -0,0 +1,257 @@ +// Copyright 2018 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package procfs + +import ( + "bufio" + "fmt" + "io" + "os" + "strconv" + "strings" +) + +// For the proc file format details, +// see https://elixir.bootlin.com/linux/v4.17/source/net/unix/af_unix.c#L2815 +// and https://elixir.bootlin.com/linux/latest/source/include/uapi/linux/net.h#L48. + +// Constants for the various /proc/net/unix enumerations. +// TODO: match against x/sys/unix or similar? +const ( + netUnixTypeStream = 1 + netUnixTypeDgram = 2 + netUnixTypeSeqpacket = 5 + + netUnixFlagDefault = 0 + netUnixFlagListen = 1 << 16 + + netUnixStateUnconnected = 1 + netUnixStateConnecting = 2 + netUnixStateConnected = 3 + netUnixStateDisconnected = 4 +) + +// NetUNIXType is the type of the type field. +type NetUNIXType uint64 + +// NetUNIXFlags is the type of the flags field. +type NetUNIXFlags uint64 + +// NetUNIXState is the type of the state field. +type NetUNIXState uint64 + +// NetUNIXLine represents a line of /proc/net/unix. +type NetUNIXLine struct { + KernelPtr string + RefCount uint64 + Protocol uint64 + Flags NetUNIXFlags + Type NetUNIXType + State NetUNIXState + Inode uint64 + Path string +} + +// NetUNIX holds the data read from /proc/net/unix. +type NetUNIX struct { + Rows []*NetUNIXLine +} + +// NetUNIX returns data read from /proc/net/unix. +func (fs FS) NetUNIX() (*NetUNIX, error) { + return readNetUNIX(fs.proc.Path("net/unix")) +} + +// readNetUNIX reads data in /proc/net/unix format from the specified file. +func readNetUNIX(file string) (*NetUNIX, error) { + // This file could be quite large and a streaming read is desirable versus + // reading the entire contents at once. + f, err := os.Open(file) + if err != nil { + return nil, err + } + defer f.Close() + + return parseNetUNIX(f) +} + +// parseNetUNIX creates a NetUnix structure from the incoming stream. +func parseNetUNIX(r io.Reader) (*NetUNIX, error) { + // Begin scanning by checking for the existence of Inode. + s := bufio.NewScanner(r) + s.Scan() + + // From the man page of proc(5), it does not contain an Inode field, + // but in actually it exists. This code works for both cases. + hasInode := strings.Contains(s.Text(), "Inode") + + // Expect a minimum number of fields, but Inode and Path are optional: + // Num RefCount Protocol Flags Type St Inode Path + minFields := 6 + if hasInode { + minFields++ + } + + var nu NetUNIX + for s.Scan() { + line := s.Text() + item, err := nu.parseLine(line, hasInode, minFields) + if err != nil { + return nil, fmt.Errorf("failed to parse /proc/net/unix data %q: %w", line, err) + } + + nu.Rows = append(nu.Rows, item) + } + + if err := s.Err(); err != nil { + return nil, fmt.Errorf("failed to scan /proc/net/unix data: %w", err) + } + + return &nu, nil +} + +func (u *NetUNIX) parseLine(line string, hasInode bool, min int) (*NetUNIXLine, error) { + fields := strings.Fields(line) + + l := len(fields) + if l < min { + return nil, fmt.Errorf("expected at least %d fields but got %d", min, l) + } + + // Field offsets are as follows: + // Num RefCount Protocol Flags Type St Inode Path + + kernelPtr := strings.TrimSuffix(fields[0], ":") + + users, err := u.parseUsers(fields[1]) + if err != nil { + return nil, fmt.Errorf("failed to parse ref count %q: %w", fields[1], err) + } + + flags, err := u.parseFlags(fields[3]) + if err != nil { + return nil, fmt.Errorf("failed to parse flags %q: %w", fields[3], err) + } + + typ, err := u.parseType(fields[4]) + if err != nil { + return nil, fmt.Errorf("failed to parse type %q: %w", fields[4], err) + } + + state, err := u.parseState(fields[5]) + if err != nil { + return nil, fmt.Errorf("failed to parse state %q: %w", fields[5], err) + } + + var inode uint64 + if hasInode { + inode, err = u.parseInode(fields[6]) + if err != nil { + return nil, fmt.Errorf("failed to parse inode %q: %w", fields[6], err) + } + } + + n := &NetUNIXLine{ + KernelPtr: kernelPtr, + RefCount: users, + Type: typ, + Flags: flags, + State: state, + Inode: inode, + } + + // Path field is optional. + if l > min { + // Path occurs at either index 6 or 7 depending on whether inode is + // already present. + pathIdx := 7 + if !hasInode { + pathIdx-- + } + + n.Path = fields[pathIdx] + } + + return n, nil +} + +func (u NetUNIX) parseUsers(s string) (uint64, error) { + return strconv.ParseUint(s, 16, 32) +} + +func (u NetUNIX) parseType(s string) (NetUNIXType, error) { + typ, err := strconv.ParseUint(s, 16, 16) + if err != nil { + return 0, err + } + + return NetUNIXType(typ), nil +} + +func (u NetUNIX) parseFlags(s string) (NetUNIXFlags, error) { + flags, err := strconv.ParseUint(s, 16, 32) + if err != nil { + return 0, err + } + + return NetUNIXFlags(flags), nil +} + +func (u NetUNIX) parseState(s string) (NetUNIXState, error) { + st, err := strconv.ParseInt(s, 16, 8) + if err != nil { + return 0, err + } + + return NetUNIXState(st), nil +} + +func (u NetUNIX) parseInode(s string) (uint64, error) { + return strconv.ParseUint(s, 10, 64) +} + +func (t NetUNIXType) String() string { + switch t { + case netUnixTypeStream: + return "stream" + case netUnixTypeDgram: + return "dgram" + case netUnixTypeSeqpacket: + return "seqpacket" + } + return "unknown" +} + +func (f NetUNIXFlags) String() string { + switch f { + case netUnixFlagListen: + return "listen" + default: + return "default" + } +} + +func (s NetUNIXState) String() string { + switch s { + case netUnixStateUnconnected: + return "unconnected" + case netUnixStateConnecting: + return "connecting" + case netUnixStateConnected: + return "connected" + case netUnixStateDisconnected: + return "disconnected" + } + return "unknown" +} diff --git a/vendor/github.com/prometheus/procfs/proc.go b/vendor/github.com/prometheus/procfs/proc.go new file mode 100644 index 00000000..28f69680 --- /dev/null +++ b/vendor/github.com/prometheus/procfs/proc.go @@ -0,0 +1,319 @@ +// Copyright 2018 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package procfs + +import ( + "bytes" + "fmt" + "io/ioutil" + "os" + "strconv" + "strings" + + "github.com/prometheus/procfs/internal/fs" + "github.com/prometheus/procfs/internal/util" +) + +// Proc provides information about a running process. +type Proc struct { + // The process ID. + PID int + + fs fs.FS +} + +// Procs represents a list of Proc structs. +type Procs []Proc + +func (p Procs) Len() int { return len(p) } +func (p Procs) Swap(i, j int) { p[i], p[j] = p[j], p[i] } +func (p Procs) Less(i, j int) bool { return p[i].PID < p[j].PID } + +// Self returns a process for the current process read via /proc/self. +func Self() (Proc, error) { + fs, err := NewFS(DefaultMountPoint) + if err != nil { + return Proc{}, err + } + return fs.Self() +} + +// NewProc returns a process for the given pid under /proc. +func NewProc(pid int) (Proc, error) { + fs, err := NewFS(DefaultMountPoint) + if err != nil { + return Proc{}, err + } + return fs.Proc(pid) +} + +// AllProcs returns a list of all currently available processes under /proc. +func AllProcs() (Procs, error) { + fs, err := NewFS(DefaultMountPoint) + if err != nil { + return Procs{}, err + } + return fs.AllProcs() +} + +// Self returns a process for the current process. +func (fs FS) Self() (Proc, error) { + p, err := os.Readlink(fs.proc.Path("self")) + if err != nil { + return Proc{}, err + } + pid, err := strconv.Atoi(strings.Replace(p, string(fs.proc), "", -1)) + if err != nil { + return Proc{}, err + } + return fs.Proc(pid) +} + +// NewProc returns a process for the given pid. +// +// Deprecated: use fs.Proc() instead +func (fs FS) NewProc(pid int) (Proc, error) { + return fs.Proc(pid) +} + +// Proc returns a process for the given pid. +func (fs FS) Proc(pid int) (Proc, error) { + if _, err := os.Stat(fs.proc.Path(strconv.Itoa(pid))); err != nil { + return Proc{}, err + } + return Proc{PID: pid, fs: fs.proc}, nil +} + +// AllProcs returns a list of all currently available processes. +func (fs FS) AllProcs() (Procs, error) { + d, err := os.Open(fs.proc.Path()) + if err != nil { + return Procs{}, err + } + defer d.Close() + + names, err := d.Readdirnames(-1) + if err != nil { + return Procs{}, fmt.Errorf("could not read %q: %w", d.Name(), err) + } + + p := Procs{} + for _, n := range names { + pid, err := strconv.ParseInt(n, 10, 64) + if err != nil { + continue + } + p = append(p, Proc{PID: int(pid), fs: fs.proc}) + } + + return p, nil +} + +// CmdLine returns the command line of a process. +func (p Proc) CmdLine() ([]string, error) { + data, err := util.ReadFileNoStat(p.path("cmdline")) + if err != nil { + return nil, err + } + + if len(data) < 1 { + return []string{}, nil + } + + return strings.Split(string(bytes.TrimRight(data, string("\x00"))), string(byte(0))), nil +} + +// Wchan returns the wchan (wait channel) of a process. +func (p Proc) Wchan() (string, error) { + f, err := os.Open(p.path("wchan")) + if err != nil { + return "", err + } + defer f.Close() + + data, err := ioutil.ReadAll(f) + if err != nil { + return "", err + } + + wchan := string(data) + if wchan == "" || wchan == "0" { + return "", nil + } + + return wchan, nil +} + +// Comm returns the command name of a process. +func (p Proc) Comm() (string, error) { + data, err := util.ReadFileNoStat(p.path("comm")) + if err != nil { + return "", err + } + + return strings.TrimSpace(string(data)), nil +} + +// Executable returns the absolute path of the executable command of a process. +func (p Proc) Executable() (string, error) { + exe, err := os.Readlink(p.path("exe")) + if os.IsNotExist(err) { + return "", nil + } + + return exe, err +} + +// Cwd returns the absolute path to the current working directory of the process. +func (p Proc) Cwd() (string, error) { + wd, err := os.Readlink(p.path("cwd")) + if os.IsNotExist(err) { + return "", nil + } + + return wd, err +} + +// RootDir returns the absolute path to the process's root directory (as set by chroot) +func (p Proc) RootDir() (string, error) { + rdir, err := os.Readlink(p.path("root")) + if os.IsNotExist(err) { + return "", nil + } + + return rdir, err +} + +// FileDescriptors returns the currently open file descriptors of a process. +func (p Proc) FileDescriptors() ([]uintptr, error) { + names, err := p.fileDescriptors() + if err != nil { + return nil, err + } + + fds := make([]uintptr, len(names)) + for i, n := range names { + fd, err := strconv.ParseInt(n, 10, 32) + if err != nil { + return nil, fmt.Errorf("could not parse fd %q: %w", n, err) + } + fds[i] = uintptr(fd) + } + + return fds, nil +} + +// FileDescriptorTargets returns the targets of all file descriptors of a process. +// If a file descriptor is not a symlink to a file (like a socket), that value will be the empty string. +func (p Proc) FileDescriptorTargets() ([]string, error) { + names, err := p.fileDescriptors() + if err != nil { + return nil, err + } + + targets := make([]string, len(names)) + + for i, name := range names { + target, err := os.Readlink(p.path("fd", name)) + if err == nil { + targets[i] = target + } + } + + return targets, nil +} + +// FileDescriptorsLen returns the number of currently open file descriptors of +// a process. +func (p Proc) FileDescriptorsLen() (int, error) { + fds, err := p.fileDescriptors() + if err != nil { + return 0, err + } + + return len(fds), nil +} + +// MountStats retrieves statistics and configuration for mount points in a +// process's namespace. +func (p Proc) MountStats() ([]*Mount, error) { + f, err := os.Open(p.path("mountstats")) + if err != nil { + return nil, err + } + defer f.Close() + + return parseMountStats(f) +} + +// MountInfo retrieves mount information for mount points in a +// process's namespace. +// It supplies information missing in `/proc/self/mounts` and +// fixes various other problems with that file too. +func (p Proc) MountInfo() ([]*MountInfo, error) { + data, err := util.ReadFileNoStat(p.path("mountinfo")) + if err != nil { + return nil, err + } + return parseMountInfo(data) +} + +func (p Proc) fileDescriptors() ([]string, error) { + d, err := os.Open(p.path("fd")) + if err != nil { + return nil, err + } + defer d.Close() + + names, err := d.Readdirnames(-1) + if err != nil { + return nil, fmt.Errorf("could not read %q: %w", d.Name(), err) + } + + return names, nil +} + +func (p Proc) path(pa ...string) string { + return p.fs.Path(append([]string{strconv.Itoa(p.PID)}, pa...)...) +} + +// FileDescriptorsInfo retrieves information about all file descriptors of +// the process. +func (p Proc) FileDescriptorsInfo() (ProcFDInfos, error) { + names, err := p.fileDescriptors() + if err != nil { + return nil, err + } + + var fdinfos ProcFDInfos + + for _, n := range names { + fdinfo, err := p.FDInfo(n) + if err != nil { + continue + } + fdinfos = append(fdinfos, *fdinfo) + } + + return fdinfos, nil +} + +// Schedstat returns task scheduling information for the process. +func (p Proc) Schedstat() (ProcSchedstat, error) { + contents, err := ioutil.ReadFile(p.path("schedstat")) + if err != nil { + return ProcSchedstat{}, err + } + return parseProcSchedstat(string(contents)) +} diff --git a/vendor/github.com/prometheus/procfs/proc_cgroup.go b/vendor/github.com/prometheus/procfs/proc_cgroup.go new file mode 100644 index 00000000..0094a13c --- /dev/null +++ b/vendor/github.com/prometheus/procfs/proc_cgroup.go @@ -0,0 +1,98 @@ +// Copyright 2020 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package procfs + +import ( + "bufio" + "bytes" + "fmt" + "strconv" + "strings" + + "github.com/prometheus/procfs/internal/util" +) + +// Cgroup models one line from /proc/[pid]/cgroup. Each Cgroup struct describes the the placement of a PID inside a +// specific control hierarchy. The kernel has two cgroup APIs, v1 and v2. v1 has one hierarchy per available resource +// controller, while v2 has one unified hierarchy shared by all controllers. Regardless of v1 or v2, all hierarchies +// contain all running processes, so the question answerable with a Cgroup struct is 'where is this process in +// this hierarchy' (where==what path on the specific cgroupfs). By prefixing this path with the mount point of +// *this specific* hierarchy, you can locate the relevant pseudo-files needed to read/set the data for this PID +// in this hierarchy +// +// Also see http://man7.org/linux/man-pages/man7/cgroups.7.html +type Cgroup struct { + // HierarchyID that can be matched to a named hierarchy using /proc/cgroups. Cgroups V2 only has one + // hierarchy, so HierarchyID is always 0. For cgroups v1 this is a unique ID number + HierarchyID int + // Controllers using this hierarchy of processes. Controllers are also known as subsystems. For + // Cgroups V2 this may be empty, as all active controllers use the same hierarchy + Controllers []string + // Path of this control group, relative to the mount point of the cgroupfs representing this specific + // hierarchy + Path string +} + +// parseCgroupString parses each line of the /proc/[pid]/cgroup file +// Line format is hierarchyID:[controller1,controller2]:path +func parseCgroupString(cgroupStr string) (*Cgroup, error) { + var err error + + fields := strings.SplitN(cgroupStr, ":", 3) + if len(fields) < 3 { + return nil, fmt.Errorf("at least 3 fields required, found %d fields in cgroup string: %s", len(fields), cgroupStr) + } + + cgroup := &Cgroup{ + Path: fields[2], + Controllers: nil, + } + cgroup.HierarchyID, err = strconv.Atoi(fields[0]) + if err != nil { + return nil, fmt.Errorf("failed to parse hierarchy ID") + } + if fields[1] != "" { + ssNames := strings.Split(fields[1], ",") + cgroup.Controllers = append(cgroup.Controllers, ssNames...) + } + return cgroup, nil +} + +// parseCgroups reads each line of the /proc/[pid]/cgroup file +func parseCgroups(data []byte) ([]Cgroup, error) { + var cgroups []Cgroup + scanner := bufio.NewScanner(bytes.NewReader(data)) + for scanner.Scan() { + mountString := scanner.Text() + parsedMounts, err := parseCgroupString(mountString) + if err != nil { + return nil, err + } + cgroups = append(cgroups, *parsedMounts) + } + + err := scanner.Err() + return cgroups, err +} + +// Cgroups reads from /proc//cgroups and returns a []*Cgroup struct locating this PID in each process +// control hierarchy running on this system. On every system (v1 and v2), all hierarchies contain all processes, +// so the len of the returned struct is equal to the number of active hierarchies on this system +func (p Proc) Cgroups() ([]Cgroup, error) { + data, err := util.ReadFileNoStat(fmt.Sprintf("/proc/%d/cgroup", p.PID)) + if err != nil { + return nil, err + } + return parseCgroups(data) +} diff --git a/vendor/github.com/prometheus/procfs/proc_environ.go b/vendor/github.com/prometheus/procfs/proc_environ.go new file mode 100644 index 00000000..6134b358 --- /dev/null +++ b/vendor/github.com/prometheus/procfs/proc_environ.go @@ -0,0 +1,37 @@ +// Copyright 2019 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package procfs + +import ( + "strings" + + "github.com/prometheus/procfs/internal/util" +) + +// Environ reads process environments from /proc//environ +func (p Proc) Environ() ([]string, error) { + environments := make([]string, 0) + + data, err := util.ReadFileNoStat(p.path("environ")) + if err != nil { + return environments, err + } + + environments = strings.Split(string(data), "\000") + if len(environments) > 0 { + environments = environments[:len(environments)-1] + } + + return environments, nil +} diff --git a/vendor/github.com/prometheus/procfs/proc_fdinfo.go b/vendor/github.com/prometheus/procfs/proc_fdinfo.go new file mode 100644 index 00000000..cf63227f --- /dev/null +++ b/vendor/github.com/prometheus/procfs/proc_fdinfo.go @@ -0,0 +1,133 @@ +// Copyright 2019 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package procfs + +import ( + "bufio" + "bytes" + "fmt" + "regexp" + + "github.com/prometheus/procfs/internal/util" +) + +// Regexp variables +var ( + rPos = regexp.MustCompile(`^pos:\s+(\d+)$`) + rFlags = regexp.MustCompile(`^flags:\s+(\d+)$`) + rMntID = regexp.MustCompile(`^mnt_id:\s+(\d+)$`) + rInotify = regexp.MustCompile(`^inotify`) + rInotifyParts = regexp.MustCompile(`^inotify\s+wd:([0-9a-f]+)\s+ino:([0-9a-f]+)\s+sdev:([0-9a-f]+)(?:\s+mask:([0-9a-f]+))?`) +) + +// ProcFDInfo contains represents file descriptor information. +type ProcFDInfo struct { + // File descriptor + FD string + // File offset + Pos string + // File access mode and status flags + Flags string + // Mount point ID + MntID string + // List of inotify lines (structured) in the fdinfo file (kernel 3.8+ only) + InotifyInfos []InotifyInfo +} + +// FDInfo constructor. On kernels older than 3.8, InotifyInfos will always be empty. +func (p Proc) FDInfo(fd string) (*ProcFDInfo, error) { + data, err := util.ReadFileNoStat(p.path("fdinfo", fd)) + if err != nil { + return nil, err + } + + var text, pos, flags, mntid string + var inotify []InotifyInfo + + scanner := bufio.NewScanner(bytes.NewReader(data)) + for scanner.Scan() { + text = scanner.Text() + if rPos.MatchString(text) { + pos = rPos.FindStringSubmatch(text)[1] + } else if rFlags.MatchString(text) { + flags = rFlags.FindStringSubmatch(text)[1] + } else if rMntID.MatchString(text) { + mntid = rMntID.FindStringSubmatch(text)[1] + } else if rInotify.MatchString(text) { + newInotify, err := parseInotifyInfo(text) + if err != nil { + return nil, err + } + inotify = append(inotify, *newInotify) + } + } + + i := &ProcFDInfo{ + FD: fd, + Pos: pos, + Flags: flags, + MntID: mntid, + InotifyInfos: inotify, + } + + return i, nil +} + +// InotifyInfo represents a single inotify line in the fdinfo file. +type InotifyInfo struct { + // Watch descriptor number + WD string + // Inode number + Ino string + // Device ID + Sdev string + // Mask of events being monitored + Mask string +} + +// InotifyInfo constructor. Only available on kernel 3.8+. +func parseInotifyInfo(line string) (*InotifyInfo, error) { + m := rInotifyParts.FindStringSubmatch(line) + if len(m) >= 4 { + var mask string + if len(m) == 5 { + mask = m[4] + } + i := &InotifyInfo{ + WD: m[1], + Ino: m[2], + Sdev: m[3], + Mask: mask, + } + return i, nil + } + return nil, fmt.Errorf("invalid inode entry: %q", line) +} + +// ProcFDInfos represents a list of ProcFDInfo structs. +type ProcFDInfos []ProcFDInfo + +func (p ProcFDInfos) Len() int { return len(p) } +func (p ProcFDInfos) Swap(i, j int) { p[i], p[j] = p[j], p[i] } +func (p ProcFDInfos) Less(i, j int) bool { return p[i].FD < p[j].FD } + +// InotifyWatchLen returns the total number of inotify watches +func (p ProcFDInfos) InotifyWatchLen() (int, error) { + length := 0 + for _, f := range p { + length += len(f.InotifyInfos) + } + + return length, nil +} diff --git a/vendor/github.com/prometheus/procfs/proc_io.go b/vendor/github.com/prometheus/procfs/proc_io.go new file mode 100644 index 00000000..776f3497 --- /dev/null +++ b/vendor/github.com/prometheus/procfs/proc_io.go @@ -0,0 +1,59 @@ +// Copyright 2018 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package procfs + +import ( + "fmt" + + "github.com/prometheus/procfs/internal/util" +) + +// ProcIO models the content of /proc//io. +type ProcIO struct { + // Chars read. + RChar uint64 + // Chars written. + WChar uint64 + // Read syscalls. + SyscR uint64 + // Write syscalls. + SyscW uint64 + // Bytes read. + ReadBytes uint64 + // Bytes written. + WriteBytes uint64 + // Bytes written, but taking into account truncation. See + // Documentation/filesystems/proc.txt in the kernel sources for + // detailed explanation. + CancelledWriteBytes int64 +} + +// IO creates a new ProcIO instance from a given Proc instance. +func (p Proc) IO() (ProcIO, error) { + pio := ProcIO{} + + data, err := util.ReadFileNoStat(p.path("io")) + if err != nil { + return pio, err + } + + ioFormat := "rchar: %d\nwchar: %d\nsyscr: %d\nsyscw: %d\n" + + "read_bytes: %d\nwrite_bytes: %d\n" + + "cancelled_write_bytes: %d\n" + + _, err = fmt.Sscanf(string(data), ioFormat, &pio.RChar, &pio.WChar, &pio.SyscR, + &pio.SyscW, &pio.ReadBytes, &pio.WriteBytes, &pio.CancelledWriteBytes) + + return pio, err +} diff --git a/vendor/github.com/prometheus/procfs/proc_limits.go b/vendor/github.com/prometheus/procfs/proc_limits.go new file mode 100644 index 00000000..dd20f198 --- /dev/null +++ b/vendor/github.com/prometheus/procfs/proc_limits.go @@ -0,0 +1,160 @@ +// Copyright 2018 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package procfs + +import ( + "bufio" + "fmt" + "os" + "regexp" + "strconv" +) + +// ProcLimits represents the soft limits for each of the process's resource +// limits. For more information see getrlimit(2): +// http://man7.org/linux/man-pages/man2/getrlimit.2.html. +type ProcLimits struct { + // CPU time limit in seconds. + CPUTime uint64 + // Maximum size of files that the process may create. + FileSize uint64 + // Maximum size of the process's data segment (initialized data, + // uninitialized data, and heap). + DataSize uint64 + // Maximum size of the process stack in bytes. + StackSize uint64 + // Maximum size of a core file. + CoreFileSize uint64 + // Limit of the process's resident set in pages. + ResidentSet uint64 + // Maximum number of processes that can be created for the real user ID of + // the calling process. + Processes uint64 + // Value one greater than the maximum file descriptor number that can be + // opened by this process. + OpenFiles uint64 + // Maximum number of bytes of memory that may be locked into RAM. + LockedMemory uint64 + // Maximum size of the process's virtual memory address space in bytes. + AddressSpace uint64 + // Limit on the combined number of flock(2) locks and fcntl(2) leases that + // this process may establish. + FileLocks uint64 + // Limit of signals that may be queued for the real user ID of the calling + // process. + PendingSignals uint64 + // Limit on the number of bytes that can be allocated for POSIX message + // queues for the real user ID of the calling process. + MsqqueueSize uint64 + // Limit of the nice priority set using setpriority(2) or nice(2). + NicePriority uint64 + // Limit of the real-time priority set using sched_setscheduler(2) or + // sched_setparam(2). + RealtimePriority uint64 + // Limit (in microseconds) on the amount of CPU time that a process + // scheduled under a real-time scheduling policy may consume without making + // a blocking system call. + RealtimeTimeout uint64 +} + +const ( + limitsFields = 4 + limitsUnlimited = "unlimited" +) + +var ( + limitsMatch = regexp.MustCompile(`(Max \w+\s{0,1}?\w*\s{0,1}\w*)\s{2,}(\w+)\s+(\w+)`) +) + +// NewLimits returns the current soft limits of the process. +// +// Deprecated: use p.Limits() instead +func (p Proc) NewLimits() (ProcLimits, error) { + return p.Limits() +} + +// Limits returns the current soft limits of the process. +func (p Proc) Limits() (ProcLimits, error) { + f, err := os.Open(p.path("limits")) + if err != nil { + return ProcLimits{}, err + } + defer f.Close() + + var ( + l = ProcLimits{} + s = bufio.NewScanner(f) + ) + + s.Scan() // Skip limits header + + for s.Scan() { + //fields := limitsMatch.Split(s.Text(), limitsFields) + fields := limitsMatch.FindStringSubmatch(s.Text()) + if len(fields) != limitsFields { + return ProcLimits{}, fmt.Errorf("couldn't parse %q line %q", f.Name(), s.Text()) + } + + switch fields[1] { + case "Max cpu time": + l.CPUTime, err = parseUint(fields[2]) + case "Max file size": + l.FileSize, err = parseUint(fields[2]) + case "Max data size": + l.DataSize, err = parseUint(fields[2]) + case "Max stack size": + l.StackSize, err = parseUint(fields[2]) + case "Max core file size": + l.CoreFileSize, err = parseUint(fields[2]) + case "Max resident set": + l.ResidentSet, err = parseUint(fields[2]) + case "Max processes": + l.Processes, err = parseUint(fields[2]) + case "Max open files": + l.OpenFiles, err = parseUint(fields[2]) + case "Max locked memory": + l.LockedMemory, err = parseUint(fields[2]) + case "Max address space": + l.AddressSpace, err = parseUint(fields[2]) + case "Max file locks": + l.FileLocks, err = parseUint(fields[2]) + case "Max pending signals": + l.PendingSignals, err = parseUint(fields[2]) + case "Max msgqueue size": + l.MsqqueueSize, err = parseUint(fields[2]) + case "Max nice priority": + l.NicePriority, err = parseUint(fields[2]) + case "Max realtime priority": + l.RealtimePriority, err = parseUint(fields[2]) + case "Max realtime timeout": + l.RealtimeTimeout, err = parseUint(fields[2]) + } + if err != nil { + return ProcLimits{}, err + } + } + + return l, s.Err() +} + +func parseUint(s string) (uint64, error) { + if s == limitsUnlimited { + return 18446744073709551615, nil + } + i, err := strconv.ParseUint(s, 10, 64) + if err != nil { + return 0, fmt.Errorf("couldn't parse value %q: %w", s, err) + } + return i, nil +} diff --git a/vendor/github.com/prometheus/procfs/proc_maps.go b/vendor/github.com/prometheus/procfs/proc_maps.go new file mode 100644 index 00000000..1d7772d5 --- /dev/null +++ b/vendor/github.com/prometheus/procfs/proc_maps.go @@ -0,0 +1,209 @@ +// Copyright 2019 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +// +build aix darwin dragonfly freebsd linux netbsd openbsd solaris + +package procfs + +import ( + "bufio" + "fmt" + "os" + "strconv" + "strings" + + "golang.org/x/sys/unix" +) + +// ProcMapPermissions contains permission settings read from /proc/[pid]/maps +type ProcMapPermissions struct { + // mapping has the [R]ead flag set + Read bool + // mapping has the [W]rite flag set + Write bool + // mapping has the [X]ecutable flag set + Execute bool + // mapping has the [S]hared flag set + Shared bool + // mapping is marked as [P]rivate (copy on write) + Private bool +} + +// ProcMap contains the process memory-mappings of the process, +// read from /proc/[pid]/maps +type ProcMap struct { + // The start address of current mapping. + StartAddr uintptr + // The end address of the current mapping + EndAddr uintptr + // The permissions for this mapping + Perms *ProcMapPermissions + // The current offset into the file/fd (e.g., shared libs) + Offset int64 + // Device owner of this mapping (major:minor) in Mkdev format. + Dev uint64 + // The inode of the device above + Inode uint64 + // The file or psuedofile (or empty==anonymous) + Pathname string +} + +// parseDevice parses the device token of a line and converts it to a dev_t +// (mkdev) like structure. +func parseDevice(s string) (uint64, error) { + toks := strings.Split(s, ":") + if len(toks) < 2 { + return 0, fmt.Errorf("unexpected number of fields") + } + + major, err := strconv.ParseUint(toks[0], 16, 0) + if err != nil { + return 0, err + } + + minor, err := strconv.ParseUint(toks[1], 16, 0) + if err != nil { + return 0, err + } + + return unix.Mkdev(uint32(major), uint32(minor)), nil +} + +// parseAddress just converts a hex-string to a uintptr +func parseAddress(s string) (uintptr, error) { + a, err := strconv.ParseUint(s, 16, 0) + if err != nil { + return 0, err + } + + return uintptr(a), nil +} + +// parseAddresses parses the start-end address +func parseAddresses(s string) (uintptr, uintptr, error) { + toks := strings.Split(s, "-") + if len(toks) < 2 { + return 0, 0, fmt.Errorf("invalid address") + } + + saddr, err := parseAddress(toks[0]) + if err != nil { + return 0, 0, err + } + + eaddr, err := parseAddress(toks[1]) + if err != nil { + return 0, 0, err + } + + return saddr, eaddr, nil +} + +// parsePermissions parses a token and returns any that are set. +func parsePermissions(s string) (*ProcMapPermissions, error) { + if len(s) < 4 { + return nil, fmt.Errorf("invalid permissions token") + } + + perms := ProcMapPermissions{} + for _, ch := range s { + switch ch { + case 'r': + perms.Read = true + case 'w': + perms.Write = true + case 'x': + perms.Execute = true + case 'p': + perms.Private = true + case 's': + perms.Shared = true + } + } + + return &perms, nil +} + +// parseProcMap will attempt to parse a single line within a proc/[pid]/maps +// buffer. +func parseProcMap(text string) (*ProcMap, error) { + fields := strings.Fields(text) + if len(fields) < 5 { + return nil, fmt.Errorf("truncated procmap entry") + } + + saddr, eaddr, err := parseAddresses(fields[0]) + if err != nil { + return nil, err + } + + perms, err := parsePermissions(fields[1]) + if err != nil { + return nil, err + } + + offset, err := strconv.ParseInt(fields[2], 16, 0) + if err != nil { + return nil, err + } + + device, err := parseDevice(fields[3]) + if err != nil { + return nil, err + } + + inode, err := strconv.ParseUint(fields[4], 10, 0) + if err != nil { + return nil, err + } + + pathname := "" + + if len(fields) >= 5 { + pathname = strings.Join(fields[5:], " ") + } + + return &ProcMap{ + StartAddr: saddr, + EndAddr: eaddr, + Perms: perms, + Offset: offset, + Dev: device, + Inode: inode, + Pathname: pathname, + }, nil +} + +// ProcMaps reads from /proc/[pid]/maps to get the memory-mappings of the +// process. +func (p Proc) ProcMaps() ([]*ProcMap, error) { + file, err := os.Open(p.path("maps")) + if err != nil { + return nil, err + } + defer file.Close() + + maps := []*ProcMap{} + scan := bufio.NewScanner(file) + + for scan.Scan() { + m, err := parseProcMap(scan.Text()) + if err != nil { + return nil, err + } + + maps = append(maps, m) + } + + return maps, nil +} diff --git a/vendor/github.com/prometheus/procfs/proc_ns.go b/vendor/github.com/prometheus/procfs/proc_ns.go new file mode 100644 index 00000000..391b4cbd --- /dev/null +++ b/vendor/github.com/prometheus/procfs/proc_ns.go @@ -0,0 +1,68 @@ +// Copyright 2018 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package procfs + +import ( + "fmt" + "os" + "strconv" + "strings" +) + +// Namespace represents a single namespace of a process. +type Namespace struct { + Type string // Namespace type. + Inode uint32 // Inode number of the namespace. If two processes are in the same namespace their inodes will match. +} + +// Namespaces contains all of the namespaces that the process is contained in. +type Namespaces map[string]Namespace + +// Namespaces reads from /proc//ns/* to get the namespaces of which the +// process is a member. +func (p Proc) Namespaces() (Namespaces, error) { + d, err := os.Open(p.path("ns")) + if err != nil { + return nil, err + } + defer d.Close() + + names, err := d.Readdirnames(-1) + if err != nil { + return nil, fmt.Errorf("failed to read contents of ns dir: %w", err) + } + + ns := make(Namespaces, len(names)) + for _, name := range names { + target, err := os.Readlink(p.path("ns", name)) + if err != nil { + return nil, err + } + + fields := strings.SplitN(target, ":", 2) + if len(fields) != 2 { + return nil, fmt.Errorf("failed to parse namespace type and inode from %q", target) + } + + typ := fields[0] + inode, err := strconv.ParseUint(strings.Trim(fields[1], "[]"), 10, 32) + if err != nil { + return nil, fmt.Errorf("failed to parse inode from %q: %w", fields[1], err) + } + + ns[name] = Namespace{typ, uint32(inode)} + } + + return ns, nil +} diff --git a/vendor/github.com/prometheus/procfs/proc_psi.go b/vendor/github.com/prometheus/procfs/proc_psi.go new file mode 100644 index 00000000..dc6c14f0 --- /dev/null +++ b/vendor/github.com/prometheus/procfs/proc_psi.go @@ -0,0 +1,100 @@ +// Copyright 2019 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package procfs + +// The PSI / pressure interface is described at +// https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/accounting/psi.txt +// Each resource (cpu, io, memory, ...) is exposed as a single file. +// Each file may contain up to two lines, one for "some" pressure and one for "full" pressure. +// Each line contains several averages (over n seconds) and a total in µs. +// +// Example io pressure file: +// > some avg10=0.06 avg60=0.21 avg300=0.99 total=8537362 +// > full avg10=0.00 avg60=0.13 avg300=0.96 total=8183134 + +import ( + "bufio" + "bytes" + "fmt" + "io" + "strings" + + "github.com/prometheus/procfs/internal/util" +) + +const lineFormat = "avg10=%f avg60=%f avg300=%f total=%d" + +// PSILine is a single line of values as returned by /proc/pressure/* +// The Avg entries are averages over n seconds, as a percentage +// The Total line is in microseconds +type PSILine struct { + Avg10 float64 + Avg60 float64 + Avg300 float64 + Total uint64 +} + +// PSIStats represent pressure stall information from /proc/pressure/* +// Some indicates the share of time in which at least some tasks are stalled +// Full indicates the share of time in which all non-idle tasks are stalled simultaneously +type PSIStats struct { + Some *PSILine + Full *PSILine +} + +// PSIStatsForResource reads pressure stall information for the specified +// resource from /proc/pressure/. At time of writing this can be +// either "cpu", "memory" or "io". +func (fs FS) PSIStatsForResource(resource string) (PSIStats, error) { + data, err := util.ReadFileNoStat(fs.proc.Path(fmt.Sprintf("%s/%s", "pressure", resource))) + if err != nil { + return PSIStats{}, fmt.Errorf("psi_stats: unavailable for %q: %w", resource, err) + } + + return parsePSIStats(resource, bytes.NewReader(data)) +} + +// parsePSIStats parses the specified file for pressure stall information +func parsePSIStats(resource string, r io.Reader) (PSIStats, error) { + psiStats := PSIStats{} + + scanner := bufio.NewScanner(r) + for scanner.Scan() { + l := scanner.Text() + prefix := strings.Split(l, " ")[0] + switch prefix { + case "some": + psi := PSILine{} + _, err := fmt.Sscanf(l, fmt.Sprintf("some %s", lineFormat), &psi.Avg10, &psi.Avg60, &psi.Avg300, &psi.Total) + if err != nil { + return PSIStats{}, err + } + psiStats.Some = &psi + case "full": + psi := PSILine{} + _, err := fmt.Sscanf(l, fmt.Sprintf("full %s", lineFormat), &psi.Avg10, &psi.Avg60, &psi.Avg300, &psi.Total) + if err != nil { + return PSIStats{}, err + } + psiStats.Full = &psi + default: + // If we encounter a line with an unknown prefix, ignore it and move on + // Should new measurement types be added in the future we'll simply ignore them instead + // of erroring on retrieval + continue + } + } + + return psiStats, nil +} diff --git a/vendor/github.com/prometheus/procfs/proc_smaps.go b/vendor/github.com/prometheus/procfs/proc_smaps.go new file mode 100644 index 00000000..a576a720 --- /dev/null +++ b/vendor/github.com/prometheus/procfs/proc_smaps.go @@ -0,0 +1,165 @@ +// Copyright 2020 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +// +build !windows + +package procfs + +import ( + "bufio" + "errors" + "fmt" + "os" + "regexp" + "strconv" + "strings" + + "github.com/prometheus/procfs/internal/util" +) + +var ( + // match the header line before each mapped zone in /proc/pid/smaps + procSMapsHeaderLine = regexp.MustCompile(`^[a-f0-9].*$`) +) + +type ProcSMapsRollup struct { + // Amount of the mapping that is currently resident in RAM + Rss uint64 + // Process's proportional share of this mapping + Pss uint64 + // Size in bytes of clean shared pages + SharedClean uint64 + // Size in bytes of dirty shared pages + SharedDirty uint64 + // Size in bytes of clean private pages + PrivateClean uint64 + // Size in bytes of dirty private pages + PrivateDirty uint64 + // Amount of memory currently marked as referenced or accessed + Referenced uint64 + // Amount of memory that does not belong to any file + Anonymous uint64 + // Amount would-be-anonymous memory currently on swap + Swap uint64 + // Process's proportional memory on swap + SwapPss uint64 +} + +// ProcSMapsRollup reads from /proc/[pid]/smaps_rollup to get summed memory information of the +// process. +// +// If smaps_rollup does not exists (require kernel >= 4.15), the content of /proc/pid/smaps will +// we read and summed. +func (p Proc) ProcSMapsRollup() (ProcSMapsRollup, error) { + data, err := util.ReadFileNoStat(p.path("smaps_rollup")) + if err != nil && os.IsNotExist(err) { + return p.procSMapsRollupManual() + } + if err != nil { + return ProcSMapsRollup{}, err + } + + lines := strings.Split(string(data), "\n") + smaps := ProcSMapsRollup{} + + // skip first line which don't contains information we need + lines = lines[1:] + for _, line := range lines { + if line == "" { + continue + } + + if err := smaps.parseLine(line); err != nil { + return ProcSMapsRollup{}, err + } + } + + return smaps, nil +} + +// Read /proc/pid/smaps and do the roll-up in Go code. +func (p Proc) procSMapsRollupManual() (ProcSMapsRollup, error) { + file, err := os.Open(p.path("smaps")) + if err != nil { + return ProcSMapsRollup{}, err + } + defer file.Close() + + smaps := ProcSMapsRollup{} + scan := bufio.NewScanner(file) + + for scan.Scan() { + line := scan.Text() + + if procSMapsHeaderLine.MatchString(line) { + continue + } + + if err := smaps.parseLine(line); err != nil { + return ProcSMapsRollup{}, err + } + } + + return smaps, nil +} + +func (s *ProcSMapsRollup) parseLine(line string) error { + kv := strings.SplitN(line, ":", 2) + if len(kv) != 2 { + fmt.Println(line) + return errors.New("invalid net/dev line, missing colon") + } + + k := kv[0] + if k == "VmFlags" { + return nil + } + + v := strings.TrimSpace(kv[1]) + v = strings.TrimRight(v, " kB") + + vKBytes, err := strconv.ParseUint(v, 10, 64) + if err != nil { + return err + } + vBytes := vKBytes * 1024 + + s.addValue(k, v, vKBytes, vBytes) + + return nil +} + +func (s *ProcSMapsRollup) addValue(k string, vString string, vUint uint64, vUintBytes uint64) { + switch k { + case "Rss": + s.Rss += vUintBytes + case "Pss": + s.Pss += vUintBytes + case "Shared_Clean": + s.SharedClean += vUintBytes + case "Shared_Dirty": + s.SharedDirty += vUintBytes + case "Private_Clean": + s.PrivateClean += vUintBytes + case "Private_Dirty": + s.PrivateDirty += vUintBytes + case "Referenced": + s.Referenced += vUintBytes + case "Anonymous": + s.Anonymous += vUintBytes + case "Swap": + s.Swap += vUintBytes + case "SwapPss": + s.SwapPss += vUintBytes + } +} diff --git a/vendor/github.com/prometheus/procfs/proc_stat.go b/vendor/github.com/prometheus/procfs/proc_stat.go new file mode 100644 index 00000000..67ca0e9f --- /dev/null +++ b/vendor/github.com/prometheus/procfs/proc_stat.go @@ -0,0 +1,189 @@ +// Copyright 2018 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package procfs + +import ( + "bytes" + "fmt" + "os" + + "github.com/prometheus/procfs/internal/fs" + "github.com/prometheus/procfs/internal/util" +) + +// Originally, this USER_HZ value was dynamically retrieved via a sysconf call +// which required cgo. However, that caused a lot of problems regarding +// cross-compilation. Alternatives such as running a binary to determine the +// value, or trying to derive it in some other way were all problematic. After +// much research it was determined that USER_HZ is actually hardcoded to 100 on +// all Go-supported platforms as of the time of this writing. This is why we +// decided to hardcode it here as well. It is not impossible that there could +// be systems with exceptions, but they should be very exotic edge cases, and +// in that case, the worst outcome will be two misreported metrics. +// +// See also the following discussions: +// +// - https://github.com/prometheus/node_exporter/issues/52 +// - https://github.com/prometheus/procfs/pull/2 +// - http://stackoverflow.com/questions/17410841/how-does-user-hz-solve-the-jiffy-scaling-issue +const userHZ = 100 + +// ProcStat provides status information about the process, +// read from /proc/[pid]/stat. +type ProcStat struct { + // The process ID. + PID int + // The filename of the executable. + Comm string + // The process state. + State string + // The PID of the parent of this process. + PPID int + // The process group ID of the process. + PGRP int + // The session ID of the process. + Session int + // The controlling terminal of the process. + TTY int + // The ID of the foreground process group of the controlling terminal of + // the process. + TPGID int + // The kernel flags word of the process. + Flags uint + // The number of minor faults the process has made which have not required + // loading a memory page from disk. + MinFlt uint + // The number of minor faults that the process's waited-for children have + // made. + CMinFlt uint + // The number of major faults the process has made which have required + // loading a memory page from disk. + MajFlt uint + // The number of major faults that the process's waited-for children have + // made. + CMajFlt uint + // Amount of time that this process has been scheduled in user mode, + // measured in clock ticks. + UTime uint + // Amount of time that this process has been scheduled in kernel mode, + // measured in clock ticks. + STime uint + // Amount of time that this process's waited-for children have been + // scheduled in user mode, measured in clock ticks. + CUTime uint + // Amount of time that this process's waited-for children have been + // scheduled in kernel mode, measured in clock ticks. + CSTime uint + // For processes running a real-time scheduling policy, this is the negated + // scheduling priority, minus one. + Priority int + // The nice value, a value in the range 19 (low priority) to -20 (high + // priority). + Nice int + // Number of threads in this process. + NumThreads int + // The time the process started after system boot, the value is expressed + // in clock ticks. + Starttime uint64 + // Virtual memory size in bytes. + VSize uint + // Resident set size in pages. + RSS int + + proc fs.FS +} + +// NewStat returns the current status information of the process. +// +// Deprecated: use p.Stat() instead +func (p Proc) NewStat() (ProcStat, error) { + return p.Stat() +} + +// Stat returns the current status information of the process. +func (p Proc) Stat() (ProcStat, error) { + data, err := util.ReadFileNoStat(p.path("stat")) + if err != nil { + return ProcStat{}, err + } + + var ( + ignore int + + s = ProcStat{PID: p.PID, proc: p.fs} + l = bytes.Index(data, []byte("(")) + r = bytes.LastIndex(data, []byte(")")) + ) + + if l < 0 || r < 0 { + return ProcStat{}, fmt.Errorf("unexpected format, couldn't extract comm %q", data) + } + + s.Comm = string(data[l+1 : r]) + _, err = fmt.Fscan( + bytes.NewBuffer(data[r+2:]), + &s.State, + &s.PPID, + &s.PGRP, + &s.Session, + &s.TTY, + &s.TPGID, + &s.Flags, + &s.MinFlt, + &s.CMinFlt, + &s.MajFlt, + &s.CMajFlt, + &s.UTime, + &s.STime, + &s.CUTime, + &s.CSTime, + &s.Priority, + &s.Nice, + &s.NumThreads, + &ignore, + &s.Starttime, + &s.VSize, + &s.RSS, + ) + if err != nil { + return ProcStat{}, err + } + + return s, nil +} + +// VirtualMemory returns the virtual memory size in bytes. +func (s ProcStat) VirtualMemory() uint { + return s.VSize +} + +// ResidentMemory returns the resident memory size in bytes. +func (s ProcStat) ResidentMemory() int { + return s.RSS * os.Getpagesize() +} + +// StartTime returns the unix timestamp of the process in seconds. +func (s ProcStat) StartTime() (float64, error) { + fs := FS{proc: s.proc} + stat, err := fs.Stat() + if err != nil { + return 0, err + } + return float64(stat.BootTime) + (float64(s.Starttime) / userHZ), nil +} + +// CPUTime returns the total CPU user and system time in seconds. +func (s ProcStat) CPUTime() float64 { + return float64(s.UTime+s.STime) / userHZ +} diff --git a/vendor/github.com/prometheus/procfs/proc_status.go b/vendor/github.com/prometheus/procfs/proc_status.go new file mode 100644 index 00000000..6edd8333 --- /dev/null +++ b/vendor/github.com/prometheus/procfs/proc_status.go @@ -0,0 +1,170 @@ +// Copyright 2018 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package procfs + +import ( + "bytes" + "strconv" + "strings" + + "github.com/prometheus/procfs/internal/util" +) + +// ProcStatus provides status information about the process, +// read from /proc/[pid]/stat. +type ProcStatus struct { + // The process ID. + PID int + // The process name. + Name string + + // Thread group ID. + TGID int + + // Peak virtual memory size. + VmPeak uint64 // nolint:golint + // Virtual memory size. + VmSize uint64 // nolint:golint + // Locked memory size. + VmLck uint64 // nolint:golint + // Pinned memory size. + VmPin uint64 // nolint:golint + // Peak resident set size. + VmHWM uint64 // nolint:golint + // Resident set size (sum of RssAnnon RssFile and RssShmem). + VmRSS uint64 // nolint:golint + // Size of resident anonymous memory. + RssAnon uint64 // nolint:golint + // Size of resident file mappings. + RssFile uint64 // nolint:golint + // Size of resident shared memory. + RssShmem uint64 // nolint:golint + // Size of data segments. + VmData uint64 // nolint:golint + // Size of stack segments. + VmStk uint64 // nolint:golint + // Size of text segments. + VmExe uint64 // nolint:golint + // Shared library code size. + VmLib uint64 // nolint:golint + // Page table entries size. + VmPTE uint64 // nolint:golint + // Size of second-level page tables. + VmPMD uint64 // nolint:golint + // Swapped-out virtual memory size by anonymous private. + VmSwap uint64 // nolint:golint + // Size of hugetlb memory portions + HugetlbPages uint64 + + // Number of voluntary context switches. + VoluntaryCtxtSwitches uint64 + // Number of involuntary context switches. + NonVoluntaryCtxtSwitches uint64 + + // UIDs of the process (Real, effective, saved set, and filesystem UIDs) + UIDs [4]string + // GIDs of the process (Real, effective, saved set, and filesystem GIDs) + GIDs [4]string +} + +// NewStatus returns the current status information of the process. +func (p Proc) NewStatus() (ProcStatus, error) { + data, err := util.ReadFileNoStat(p.path("status")) + if err != nil { + return ProcStatus{}, err + } + + s := ProcStatus{PID: p.PID} + + lines := strings.Split(string(data), "\n") + for _, line := range lines { + if !bytes.Contains([]byte(line), []byte(":")) { + continue + } + + kv := strings.SplitN(line, ":", 2) + + // removes spaces + k := string(strings.TrimSpace(kv[0])) + v := string(strings.TrimSpace(kv[1])) + // removes "kB" + v = string(bytes.Trim([]byte(v), " kB")) + + // value to int when possible + // we can skip error check here, 'cause vKBytes is not used when value is a string + vKBytes, _ := strconv.ParseUint(v, 10, 64) + // convert kB to B + vBytes := vKBytes * 1024 + + s.fillStatus(k, v, vKBytes, vBytes) + } + + return s, nil +} + +func (s *ProcStatus) fillStatus(k string, vString string, vUint uint64, vUintBytes uint64) { + switch k { + case "Tgid": + s.TGID = int(vUint) + case "Name": + s.Name = vString + case "Uid": + copy(s.UIDs[:], strings.Split(vString, "\t")) + case "Gid": + copy(s.GIDs[:], strings.Split(vString, "\t")) + case "VmPeak": + s.VmPeak = vUintBytes + case "VmSize": + s.VmSize = vUintBytes + case "VmLck": + s.VmLck = vUintBytes + case "VmPin": + s.VmPin = vUintBytes + case "VmHWM": + s.VmHWM = vUintBytes + case "VmRSS": + s.VmRSS = vUintBytes + case "RssAnon": + s.RssAnon = vUintBytes + case "RssFile": + s.RssFile = vUintBytes + case "RssShmem": + s.RssShmem = vUintBytes + case "VmData": + s.VmData = vUintBytes + case "VmStk": + s.VmStk = vUintBytes + case "VmExe": + s.VmExe = vUintBytes + case "VmLib": + s.VmLib = vUintBytes + case "VmPTE": + s.VmPTE = vUintBytes + case "VmPMD": + s.VmPMD = vUintBytes + case "VmSwap": + s.VmSwap = vUintBytes + case "HugetlbPages": + s.HugetlbPages = vUintBytes + case "voluntary_ctxt_switches": + s.VoluntaryCtxtSwitches = vUint + case "nonvoluntary_ctxt_switches": + s.NonVoluntaryCtxtSwitches = vUint + } +} + +// TotalCtxtSwitches returns the total context switch. +func (s ProcStatus) TotalCtxtSwitches() uint64 { + return s.VoluntaryCtxtSwitches + s.NonVoluntaryCtxtSwitches +} diff --git a/vendor/github.com/prometheus/procfs/schedstat.go b/vendor/github.com/prometheus/procfs/schedstat.go new file mode 100644 index 00000000..28228164 --- /dev/null +++ b/vendor/github.com/prometheus/procfs/schedstat.go @@ -0,0 +1,121 @@ +// Copyright 2019 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package procfs + +import ( + "bufio" + "errors" + "os" + "regexp" + "strconv" +) + +var ( + cpuLineRE = regexp.MustCompile(`cpu(\d+) (\d+) (\d+) (\d+) (\d+) (\d+) (\d+) (\d+) (\d+) (\d+)`) + procLineRE = regexp.MustCompile(`(\d+) (\d+) (\d+)`) +) + +// Schedstat contains scheduler statistics from /proc/schedstat +// +// See +// https://www.kernel.org/doc/Documentation/scheduler/sched-stats.txt +// for a detailed description of what these numbers mean. +// +// Note the current kernel documentation claims some of the time units are in +// jiffies when they are actually in nanoseconds since 2.6.23 with the +// introduction of CFS. A fix to the documentation is pending. See +// https://lore.kernel.org/patchwork/project/lkml/list/?series=403473 +type Schedstat struct { + CPUs []*SchedstatCPU +} + +// SchedstatCPU contains the values from one "cpu" line +type SchedstatCPU struct { + CPUNum string + + RunningNanoseconds uint64 + WaitingNanoseconds uint64 + RunTimeslices uint64 +} + +// ProcSchedstat contains the values from /proc//schedstat +type ProcSchedstat struct { + RunningNanoseconds uint64 + WaitingNanoseconds uint64 + RunTimeslices uint64 +} + +// Schedstat reads data from /proc/schedstat +func (fs FS) Schedstat() (*Schedstat, error) { + file, err := os.Open(fs.proc.Path("schedstat")) + if err != nil { + return nil, err + } + defer file.Close() + + stats := &Schedstat{} + scanner := bufio.NewScanner(file) + + for scanner.Scan() { + match := cpuLineRE.FindStringSubmatch(scanner.Text()) + if match != nil { + cpu := &SchedstatCPU{} + cpu.CPUNum = match[1] + + cpu.RunningNanoseconds, err = strconv.ParseUint(match[8], 10, 64) + if err != nil { + continue + } + + cpu.WaitingNanoseconds, err = strconv.ParseUint(match[9], 10, 64) + if err != nil { + continue + } + + cpu.RunTimeslices, err = strconv.ParseUint(match[10], 10, 64) + if err != nil { + continue + } + + stats.CPUs = append(stats.CPUs, cpu) + } + } + + return stats, nil +} + +func parseProcSchedstat(contents string) (ProcSchedstat, error) { + var ( + stats ProcSchedstat + err error + ) + match := procLineRE.FindStringSubmatch(contents) + + if match != nil { + stats.RunningNanoseconds, err = strconv.ParseUint(match[1], 10, 64) + if err != nil { + return stats, err + } + + stats.WaitingNanoseconds, err = strconv.ParseUint(match[2], 10, 64) + if err != nil { + return stats, err + } + + stats.RunTimeslices, err = strconv.ParseUint(match[3], 10, 64) + return stats, err + } + + return stats, errors.New("could not parse schedstat") +} diff --git a/vendor/github.com/prometheus/procfs/slab.go b/vendor/github.com/prometheus/procfs/slab.go new file mode 100644 index 00000000..7896fd72 --- /dev/null +++ b/vendor/github.com/prometheus/procfs/slab.go @@ -0,0 +1,151 @@ +// Copyright 2020 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package procfs + +import ( + "bufio" + "bytes" + "fmt" + "regexp" + "strconv" + "strings" + + "github.com/prometheus/procfs/internal/util" +) + +var ( + slabSpace = regexp.MustCompile(`\s+`) + slabVer = regexp.MustCompile(`slabinfo -`) + slabHeader = regexp.MustCompile(`# name`) +) + +// Slab represents a slab pool in the kernel. +type Slab struct { + Name string + ObjActive int64 + ObjNum int64 + ObjSize int64 + ObjPerSlab int64 + PagesPerSlab int64 + // tunables + Limit int64 + Batch int64 + SharedFactor int64 + SlabActive int64 + SlabNum int64 + SharedAvail int64 +} + +// SlabInfo represents info for all slabs. +type SlabInfo struct { + Slabs []*Slab +} + +func shouldParseSlab(line string) bool { + if slabVer.MatchString(line) { + return false + } + if slabHeader.MatchString(line) { + return false + } + return true +} + +// parseV21SlabEntry is used to parse a line from /proc/slabinfo version 2.1. +func parseV21SlabEntry(line string) (*Slab, error) { + // First cleanup whitespace. + l := slabSpace.ReplaceAllString(line, " ") + s := strings.Split(l, " ") + if len(s) != 16 { + return nil, fmt.Errorf("unable to parse: %q", line) + } + var err error + i := &Slab{Name: s[0]} + i.ObjActive, err = strconv.ParseInt(s[1], 10, 64) + if err != nil { + return nil, err + } + i.ObjNum, err = strconv.ParseInt(s[2], 10, 64) + if err != nil { + return nil, err + } + i.ObjSize, err = strconv.ParseInt(s[3], 10, 64) + if err != nil { + return nil, err + } + i.ObjPerSlab, err = strconv.ParseInt(s[4], 10, 64) + if err != nil { + return nil, err + } + i.PagesPerSlab, err = strconv.ParseInt(s[5], 10, 64) + if err != nil { + return nil, err + } + i.Limit, err = strconv.ParseInt(s[8], 10, 64) + if err != nil { + return nil, err + } + i.Batch, err = strconv.ParseInt(s[9], 10, 64) + if err != nil { + return nil, err + } + i.SharedFactor, err = strconv.ParseInt(s[10], 10, 64) + if err != nil { + return nil, err + } + i.SlabActive, err = strconv.ParseInt(s[13], 10, 64) + if err != nil { + return nil, err + } + i.SlabNum, err = strconv.ParseInt(s[14], 10, 64) + if err != nil { + return nil, err + } + i.SharedAvail, err = strconv.ParseInt(s[15], 10, 64) + if err != nil { + return nil, err + } + return i, nil +} + +// parseSlabInfo21 is used to parse a slabinfo 2.1 file. +func parseSlabInfo21(r *bytes.Reader) (SlabInfo, error) { + scanner := bufio.NewScanner(r) + s := SlabInfo{Slabs: []*Slab{}} + for scanner.Scan() { + line := scanner.Text() + if !shouldParseSlab(line) { + continue + } + slab, err := parseV21SlabEntry(line) + if err != nil { + return s, err + } + s.Slabs = append(s.Slabs, slab) + } + return s, nil +} + +// SlabInfo reads data from /proc/slabinfo +func (fs FS) SlabInfo() (SlabInfo, error) { + // TODO: Consider passing options to allow for parsing different + // slabinfo versions. However, slabinfo 2.1 has been stable since + // kernel 2.6.10 and later. + data, err := util.ReadFileNoStat(fs.proc.Path("slabinfo")) + if err != nil { + return SlabInfo{}, err + } + + return parseSlabInfo21(bytes.NewReader(data)) +} diff --git a/vendor/github.com/prometheus/procfs/stat.go b/vendor/github.com/prometheus/procfs/stat.go new file mode 100644 index 00000000..6d872754 --- /dev/null +++ b/vendor/github.com/prometheus/procfs/stat.go @@ -0,0 +1,244 @@ +// Copyright 2018 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package procfs + +import ( + "bufio" + "bytes" + "fmt" + "io" + "strconv" + "strings" + + "github.com/prometheus/procfs/internal/fs" + "github.com/prometheus/procfs/internal/util" +) + +// CPUStat shows how much time the cpu spend in various stages. +type CPUStat struct { + User float64 + Nice float64 + System float64 + Idle float64 + Iowait float64 + IRQ float64 + SoftIRQ float64 + Steal float64 + Guest float64 + GuestNice float64 +} + +// SoftIRQStat represent the softirq statistics as exported in the procfs stat file. +// A nice introduction can be found at https://0xax.gitbooks.io/linux-insides/content/interrupts/interrupts-9.html +// It is possible to get per-cpu stats by reading /proc/softirqs +type SoftIRQStat struct { + Hi uint64 + Timer uint64 + NetTx uint64 + NetRx uint64 + Block uint64 + BlockIoPoll uint64 + Tasklet uint64 + Sched uint64 + Hrtimer uint64 + Rcu uint64 +} + +// Stat represents kernel/system statistics. +type Stat struct { + // Boot time in seconds since the Epoch. + BootTime uint64 + // Summed up cpu statistics. + CPUTotal CPUStat + // Per-CPU statistics. + CPU []CPUStat + // Number of times interrupts were handled, which contains numbered and unnumbered IRQs. + IRQTotal uint64 + // Number of times a numbered IRQ was triggered. + IRQ []uint64 + // Number of times a context switch happened. + ContextSwitches uint64 + // Number of times a process was created. + ProcessCreated uint64 + // Number of processes currently running. + ProcessesRunning uint64 + // Number of processes currently blocked (waiting for IO). + ProcessesBlocked uint64 + // Number of times a softirq was scheduled. + SoftIRQTotal uint64 + // Detailed softirq statistics. + SoftIRQ SoftIRQStat +} + +// Parse a cpu statistics line and returns the CPUStat struct plus the cpu id (or -1 for the overall sum). +func parseCPUStat(line string) (CPUStat, int64, error) { + cpuStat := CPUStat{} + var cpu string + + count, err := fmt.Sscanf(line, "%s %f %f %f %f %f %f %f %f %f %f", + &cpu, + &cpuStat.User, &cpuStat.Nice, &cpuStat.System, &cpuStat.Idle, + &cpuStat.Iowait, &cpuStat.IRQ, &cpuStat.SoftIRQ, &cpuStat.Steal, + &cpuStat.Guest, &cpuStat.GuestNice) + + if err != nil && err != io.EOF { + return CPUStat{}, -1, fmt.Errorf("couldn't parse %q (cpu): %w", line, err) + } + if count == 0 { + return CPUStat{}, -1, fmt.Errorf("couldn't parse %q (cpu): 0 elements parsed", line) + } + + cpuStat.User /= userHZ + cpuStat.Nice /= userHZ + cpuStat.System /= userHZ + cpuStat.Idle /= userHZ + cpuStat.Iowait /= userHZ + cpuStat.IRQ /= userHZ + cpuStat.SoftIRQ /= userHZ + cpuStat.Steal /= userHZ + cpuStat.Guest /= userHZ + cpuStat.GuestNice /= userHZ + + if cpu == "cpu" { + return cpuStat, -1, nil + } + + cpuID, err := strconv.ParseInt(cpu[3:], 10, 64) + if err != nil { + return CPUStat{}, -1, fmt.Errorf("couldn't parse %q (cpu/cpuid): %w", line, err) + } + + return cpuStat, cpuID, nil +} + +// Parse a softirq line. +func parseSoftIRQStat(line string) (SoftIRQStat, uint64, error) { + softIRQStat := SoftIRQStat{} + var total uint64 + var prefix string + + _, err := fmt.Sscanf(line, "%s %d %d %d %d %d %d %d %d %d %d %d", + &prefix, &total, + &softIRQStat.Hi, &softIRQStat.Timer, &softIRQStat.NetTx, &softIRQStat.NetRx, + &softIRQStat.Block, &softIRQStat.BlockIoPoll, + &softIRQStat.Tasklet, &softIRQStat.Sched, + &softIRQStat.Hrtimer, &softIRQStat.Rcu) + + if err != nil { + return SoftIRQStat{}, 0, fmt.Errorf("couldn't parse %q (softirq): %w", line, err) + } + + return softIRQStat, total, nil +} + +// NewStat returns information about current cpu/process statistics. +// See https://www.kernel.org/doc/Documentation/filesystems/proc.txt +// +// Deprecated: use fs.Stat() instead +func NewStat() (Stat, error) { + fs, err := NewFS(fs.DefaultProcMountPoint) + if err != nil { + return Stat{}, err + } + return fs.Stat() +} + +// NewStat returns information about current cpu/process statistics. +// See https://www.kernel.org/doc/Documentation/filesystems/proc.txt +// +// Deprecated: use fs.Stat() instead +func (fs FS) NewStat() (Stat, error) { + return fs.Stat() +} + +// Stat returns information about current cpu/process statistics. +// See https://www.kernel.org/doc/Documentation/filesystems/proc.txt +func (fs FS) Stat() (Stat, error) { + fileName := fs.proc.Path("stat") + data, err := util.ReadFileNoStat(fileName) + if err != nil { + return Stat{}, err + } + + stat := Stat{} + + scanner := bufio.NewScanner(bytes.NewReader(data)) + for scanner.Scan() { + line := scanner.Text() + parts := strings.Fields(scanner.Text()) + // require at least + if len(parts) < 2 { + continue + } + switch { + case parts[0] == "btime": + if stat.BootTime, err = strconv.ParseUint(parts[1], 10, 64); err != nil { + return Stat{}, fmt.Errorf("couldn't parse %q (btime): %w", parts[1], err) + } + case parts[0] == "intr": + if stat.IRQTotal, err = strconv.ParseUint(parts[1], 10, 64); err != nil { + return Stat{}, fmt.Errorf("couldn't parse %q (intr): %w", parts[1], err) + } + numberedIRQs := parts[2:] + stat.IRQ = make([]uint64, len(numberedIRQs)) + for i, count := range numberedIRQs { + if stat.IRQ[i], err = strconv.ParseUint(count, 10, 64); err != nil { + return Stat{}, fmt.Errorf("couldn't parse %q (intr%d): %w", count, i, err) + } + } + case parts[0] == "ctxt": + if stat.ContextSwitches, err = strconv.ParseUint(parts[1], 10, 64); err != nil { + return Stat{}, fmt.Errorf("couldn't parse %q (ctxt): %w", parts[1], err) + } + case parts[0] == "processes": + if stat.ProcessCreated, err = strconv.ParseUint(parts[1], 10, 64); err != nil { + return Stat{}, fmt.Errorf("couldn't parse %q (processes): %w", parts[1], err) + } + case parts[0] == "procs_running": + if stat.ProcessesRunning, err = strconv.ParseUint(parts[1], 10, 64); err != nil { + return Stat{}, fmt.Errorf("couldn't parse %q (procs_running): %w", parts[1], err) + } + case parts[0] == "procs_blocked": + if stat.ProcessesBlocked, err = strconv.ParseUint(parts[1], 10, 64); err != nil { + return Stat{}, fmt.Errorf("couldn't parse %q (procs_blocked): %w", parts[1], err) + } + case parts[0] == "softirq": + softIRQStats, total, err := parseSoftIRQStat(line) + if err != nil { + return Stat{}, err + } + stat.SoftIRQTotal = total + stat.SoftIRQ = softIRQStats + case strings.HasPrefix(parts[0], "cpu"): + cpuStat, cpuID, err := parseCPUStat(line) + if err != nil { + return Stat{}, err + } + if cpuID == -1 { + stat.CPUTotal = cpuStat + } else { + for int64(len(stat.CPU)) <= cpuID { + stat.CPU = append(stat.CPU, CPUStat{}) + } + stat.CPU[cpuID] = cpuStat + } + } + } + + if err := scanner.Err(); err != nil { + return Stat{}, fmt.Errorf("couldn't parse %q: %w", fileName, err) + } + + return stat, nil +} diff --git a/vendor/github.com/prometheus/procfs/swaps.go b/vendor/github.com/prometheus/procfs/swaps.go new file mode 100644 index 00000000..15edc221 --- /dev/null +++ b/vendor/github.com/prometheus/procfs/swaps.go @@ -0,0 +1,89 @@ +// Copyright 2019 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package procfs + +import ( + "bufio" + "bytes" + "fmt" + "strconv" + "strings" + + "github.com/prometheus/procfs/internal/util" +) + +// Swap represents an entry in /proc/swaps. +type Swap struct { + Filename string + Type string + Size int + Used int + Priority int +} + +// Swaps returns a slice of all configured swap devices on the system. +func (fs FS) Swaps() ([]*Swap, error) { + data, err := util.ReadFileNoStat(fs.proc.Path("swaps")) + if err != nil { + return nil, err + } + return parseSwaps(data) +} + +func parseSwaps(info []byte) ([]*Swap, error) { + swaps := []*Swap{} + scanner := bufio.NewScanner(bytes.NewReader(info)) + scanner.Scan() // ignore header line + for scanner.Scan() { + swapString := scanner.Text() + parsedSwap, err := parseSwapString(swapString) + if err != nil { + return nil, err + } + swaps = append(swaps, parsedSwap) + } + + err := scanner.Err() + return swaps, err +} + +func parseSwapString(swapString string) (*Swap, error) { + var err error + + swapFields := strings.Fields(swapString) + swapLength := len(swapFields) + if swapLength < 5 { + return nil, fmt.Errorf("too few fields in swap string: %s", swapString) + } + + swap := &Swap{ + Filename: swapFields[0], + Type: swapFields[1], + } + + swap.Size, err = strconv.Atoi(swapFields[2]) + if err != nil { + return nil, fmt.Errorf("invalid swap size: %s", swapFields[2]) + } + swap.Used, err = strconv.Atoi(swapFields[3]) + if err != nil { + return nil, fmt.Errorf("invalid swap used: %s", swapFields[3]) + } + swap.Priority, err = strconv.Atoi(swapFields[4]) + if err != nil { + return nil, fmt.Errorf("invalid swap priority: %s", swapFields[4]) + } + + return swap, nil +} diff --git a/vendor/github.com/prometheus/procfs/ttar b/vendor/github.com/prometheus/procfs/ttar new file mode 100644 index 00000000..19ef02b8 --- /dev/null +++ b/vendor/github.com/prometheus/procfs/ttar @@ -0,0 +1,413 @@ +#!/usr/bin/env bash + +# Purpose: plain text tar format +# Limitations: - only suitable for text files, directories, and symlinks +# - stores only filename, content, and mode +# - not designed for untrusted input +# +# Note: must work with bash version 3.2 (macOS) + +# Copyright 2017 Roger Luethi +# +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. + +set -o errexit -o nounset + +# Sanitize environment (for instance, standard sorting of glob matches) +export LC_ALL=C + +path="" +CMD="" +ARG_STRING="$*" + +#------------------------------------------------------------------------------ +# Not all sed implementations can work on null bytes. In order to make ttar +# work out of the box on macOS, use Python as a stream editor. + +USE_PYTHON=0 + +PYTHON_CREATE_FILTER=$(cat << 'PCF' +#!/usr/bin/env python + +import re +import sys + +for line in sys.stdin: + line = re.sub(r'EOF', r'\EOF', line) + line = re.sub(r'NULLBYTE', r'\NULLBYTE', line) + line = re.sub('\x00', r'NULLBYTE', line) + sys.stdout.write(line) +PCF +) + +PYTHON_EXTRACT_FILTER=$(cat << 'PEF' +#!/usr/bin/env python + +import re +import sys + +for line in sys.stdin: + line = re.sub(r'(?/dev/null; then + echo "ERROR Python not found. Aborting." + exit 2 + fi + USE_PYTHON=1 + fi +} + +#------------------------------------------------------------------------------ + +function usage { + bname=$(basename "$0") + cat << USAGE +Usage: $bname [-C ] -c -f (create archive) + $bname -t -f (list archive contents) + $bname [-C ] -x -f (extract archive) + +Options: + -C (change directory) + -v (verbose) + --recursive-unlink (recursively delete existing directory if path + collides with file or directory to extract) + +Example: Change to sysfs directory, create ttar file from fixtures directory + $bname -C sysfs -c -f sysfs/fixtures.ttar fixtures/ +USAGE +exit "$1" +} + +function vecho { + if [ "${VERBOSE:-}" == "yes" ]; then + echo >&7 "$@" + fi +} + +function set_cmd { + if [ -n "$CMD" ]; then + echo "ERROR: more than one command given" + echo + usage 2 + fi + CMD=$1 +} + +unset VERBOSE +unset RECURSIVE_UNLINK + +while getopts :cf:-:htxvC: opt; do + case $opt in + c) + set_cmd "create" + ;; + f) + ARCHIVE=$OPTARG + ;; + h) + usage 0 + ;; + t) + set_cmd "list" + ;; + x) + set_cmd "extract" + ;; + v) + VERBOSE=yes + exec 7>&1 + ;; + C) + CDIR=$OPTARG + ;; + -) + case $OPTARG in + recursive-unlink) + RECURSIVE_UNLINK="yes" + ;; + *) + echo -e "Error: invalid option -$OPTARG" + echo + usage 1 + ;; + esac + ;; + *) + echo >&2 "ERROR: invalid option -$OPTARG" + echo + usage 1 + ;; + esac +done + +# Remove processed options from arguments +shift $(( OPTIND - 1 )); + +if [ "${CMD:-}" == "" ]; then + echo >&2 "ERROR: no command given" + echo + usage 1 +elif [ "${ARCHIVE:-}" == "" ]; then + echo >&2 "ERROR: no archive name given" + echo + usage 1 +fi + +function list { + local path="" + local size=0 + local line_no=0 + local ttar_file=$1 + if [ -n "${2:-}" ]; then + echo >&2 "ERROR: too many arguments." + echo + usage 1 + fi + if [ ! -e "$ttar_file" ]; then + echo >&2 "ERROR: file not found ($ttar_file)" + echo + usage 1 + fi + while read -r line; do + line_no=$(( line_no + 1 )) + if [ $size -gt 0 ]; then + size=$(( size - 1 )) + continue + fi + if [[ $line =~ ^Path:\ (.*)$ ]]; then + path=${BASH_REMATCH[1]} + elif [[ $line =~ ^Lines:\ (.*)$ ]]; then + size=${BASH_REMATCH[1]} + echo "$path" + elif [[ $line =~ ^Directory:\ (.*)$ ]]; then + path=${BASH_REMATCH[1]} + echo "$path/" + elif [[ $line =~ ^SymlinkTo:\ (.*)$ ]]; then + echo "$path -> ${BASH_REMATCH[1]}" + fi + done < "$ttar_file" +} + +function extract { + local path="" + local size=0 + local line_no=0 + local ttar_file=$1 + if [ -n "${2:-}" ]; then + echo >&2 "ERROR: too many arguments." + echo + usage 1 + fi + if [ ! -e "$ttar_file" ]; then + echo >&2 "ERROR: file not found ($ttar_file)" + echo + usage 1 + fi + while IFS= read -r line; do + line_no=$(( line_no + 1 )) + local eof_without_newline + if [ "$size" -gt 0 ]; then + if [[ "$line" =~ [^\\]EOF ]]; then + # An EOF not preceded by a backslash indicates that the line + # does not end with a newline + eof_without_newline=1 + else + eof_without_newline=0 + fi + # Replace NULLBYTE with null byte if at beginning of line + # Replace NULLBYTE with null byte unless preceded by backslash + # Remove one backslash in front of NULLBYTE (if any) + # Remove EOF unless preceded by backslash + # Remove one backslash in front of EOF + if [ $USE_PYTHON -eq 1 ]; then + echo -n "$line" | python -c "$PYTHON_EXTRACT_FILTER" >> "$path" + else + # The repeated pattern makes up for sed's lack of negative + # lookbehind assertions (for consecutive null bytes). + echo -n "$line" | \ + sed -e 's/^NULLBYTE/\x0/g; + s/\([^\\]\)NULLBYTE/\1\x0/g; + s/\([^\\]\)NULLBYTE/\1\x0/g; + s/\\NULLBYTE/NULLBYTE/g; + s/\([^\\]\)EOF/\1/g; + s/\\EOF/EOF/g; + ' >> "$path" + fi + if [[ "$eof_without_newline" -eq 0 ]]; then + echo >> "$path" + fi + size=$(( size - 1 )) + continue + fi + if [[ $line =~ ^Path:\ (.*)$ ]]; then + path=${BASH_REMATCH[1]} + if [ -L "$path" ]; then + rm "$path" + elif [ -d "$path" ]; then + if [ "${RECURSIVE_UNLINK:-}" == "yes" ]; then + rm -r "$path" + else + # Safe because symlinks to directories are dealt with above + rmdir "$path" + fi + elif [ -e "$path" ]; then + rm "$path" + fi + elif [[ $line =~ ^Lines:\ (.*)$ ]]; then + size=${BASH_REMATCH[1]} + # Create file even if it is zero-length. + touch "$path" + vecho " $path" + elif [[ $line =~ ^Mode:\ (.*)$ ]]; then + mode=${BASH_REMATCH[1]} + chmod "$mode" "$path" + vecho "$mode" + elif [[ $line =~ ^Directory:\ (.*)$ ]]; then + path=${BASH_REMATCH[1]} + mkdir -p "$path" + vecho " $path/" + elif [[ $line =~ ^SymlinkTo:\ (.*)$ ]]; then + ln -s "${BASH_REMATCH[1]}" "$path" + vecho " $path -> ${BASH_REMATCH[1]}" + elif [[ $line =~ ^# ]]; then + # Ignore comments between files + continue + else + echo >&2 "ERROR: Unknown keyword on line $line_no: $line" + exit 1 + fi + done < "$ttar_file" +} + +function div { + echo "# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -" \ + "- - - - - -" +} + +function get_mode { + local mfile=$1 + if [ -z "${STAT_OPTION:-}" ]; then + if stat -c '%a' "$mfile" >/dev/null 2>&1; then + # GNU stat + STAT_OPTION='-c' + STAT_FORMAT='%a' + else + # BSD stat + STAT_OPTION='-f' + # Octal output, user/group/other (omit file type, sticky bit) + STAT_FORMAT='%OLp' + fi + fi + stat "${STAT_OPTION}" "${STAT_FORMAT}" "$mfile" +} + +function _create { + shopt -s nullglob + local mode + local eof_without_newline + while (( "$#" )); do + file=$1 + if [ -L "$file" ]; then + echo "Path: $file" + symlinkTo=$(readlink "$file") + echo "SymlinkTo: $symlinkTo" + vecho " $file -> $symlinkTo" + div + elif [ -d "$file" ]; then + # Strip trailing slash (if there is one) + file=${file%/} + echo "Directory: $file" + mode=$(get_mode "$file") + echo "Mode: $mode" + vecho "$mode $file/" + div + # Find all files and dirs, including hidden/dot files + for x in "$file/"{*,.[^.]*}; do + _create "$x" + done + elif [ -f "$file" ]; then + echo "Path: $file" + lines=$(wc -l "$file"|awk '{print $1}') + eof_without_newline=0 + if [[ "$(wc -c "$file"|awk '{print $1}')" -gt 0 ]] && \ + [[ "$(tail -c 1 "$file" | wc -l)" -eq 0 ]]; then + eof_without_newline=1 + lines=$((lines+1)) + fi + echo "Lines: $lines" + # Add backslash in front of EOF + # Add backslash in front of NULLBYTE + # Replace null byte with NULLBYTE + if [ $USE_PYTHON -eq 1 ]; then + < "$file" python -c "$PYTHON_CREATE_FILTER" + else + < "$file" \ + sed 's/EOF/\\EOF/g; + s/NULLBYTE/\\NULLBYTE/g; + s/\x0/NULLBYTE/g; + ' + fi + if [[ "$eof_without_newline" -eq 1 ]]; then + # Finish line with EOF to indicate that the original line did + # not end with a linefeed + echo "EOF" + fi + mode=$(get_mode "$file") + echo "Mode: $mode" + vecho "$mode $file" + div + else + echo >&2 "ERROR: file not found ($file in $(pwd))" + exit 2 + fi + shift + done +} + +function create { + ttar_file=$1 + shift + if [ -z "${1:-}" ]; then + echo >&2 "ERROR: missing arguments." + echo + usage 1 + fi + if [ -e "$ttar_file" ]; then + rm "$ttar_file" + fi + exec > "$ttar_file" + echo "# Archive created by ttar $ARG_STRING" + _create "$@" +} + +test_environment + +if [ -n "${CDIR:-}" ]; then + if [[ "$ARCHIVE" != /* ]]; then + # Relative path: preserve the archive's location before changing + # directory + ARCHIVE="$(pwd)/$ARCHIVE" + fi + cd "$CDIR" +fi + +"$CMD" "$ARCHIVE" "$@" diff --git a/vendor/github.com/prometheus/procfs/vm.go b/vendor/github.com/prometheus/procfs/vm.go new file mode 100644 index 00000000..cb138914 --- /dev/null +++ b/vendor/github.com/prometheus/procfs/vm.go @@ -0,0 +1,210 @@ +// Copyright 2019 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +// +build !windows + +package procfs + +import ( + "fmt" + "io/ioutil" + "os" + "path/filepath" + "strings" + + "github.com/prometheus/procfs/internal/util" +) + +// The VM interface is described at +// https://www.kernel.org/doc/Documentation/sysctl/vm.txt +// Each setting is exposed as a single file. +// Each file contains one line with a single numerical value, except lowmem_reserve_ratio which holds an array +// and numa_zonelist_order (deprecated) which is a string +type VM struct { + AdminReserveKbytes *int64 // /proc/sys/vm/admin_reserve_kbytes + BlockDump *int64 // /proc/sys/vm/block_dump + CompactUnevictableAllowed *int64 // /proc/sys/vm/compact_unevictable_allowed + DirtyBackgroundBytes *int64 // /proc/sys/vm/dirty_background_bytes + DirtyBackgroundRatio *int64 // /proc/sys/vm/dirty_background_ratio + DirtyBytes *int64 // /proc/sys/vm/dirty_bytes + DirtyExpireCentisecs *int64 // /proc/sys/vm/dirty_expire_centisecs + DirtyRatio *int64 // /proc/sys/vm/dirty_ratio + DirtytimeExpireSeconds *int64 // /proc/sys/vm/dirtytime_expire_seconds + DirtyWritebackCentisecs *int64 // /proc/sys/vm/dirty_writeback_centisecs + DropCaches *int64 // /proc/sys/vm/drop_caches + ExtfragThreshold *int64 // /proc/sys/vm/extfrag_threshold + HugetlbShmGroup *int64 // /proc/sys/vm/hugetlb_shm_group + LaptopMode *int64 // /proc/sys/vm/laptop_mode + LegacyVaLayout *int64 // /proc/sys/vm/legacy_va_layout + LowmemReserveRatio []*int64 // /proc/sys/vm/lowmem_reserve_ratio + MaxMapCount *int64 // /proc/sys/vm/max_map_count + MemoryFailureEarlyKill *int64 // /proc/sys/vm/memory_failure_early_kill + MemoryFailureRecovery *int64 // /proc/sys/vm/memory_failure_recovery + MinFreeKbytes *int64 // /proc/sys/vm/min_free_kbytes + MinSlabRatio *int64 // /proc/sys/vm/min_slab_ratio + MinUnmappedRatio *int64 // /proc/sys/vm/min_unmapped_ratio + MmapMinAddr *int64 // /proc/sys/vm/mmap_min_addr + NrHugepages *int64 // /proc/sys/vm/nr_hugepages + NrHugepagesMempolicy *int64 // /proc/sys/vm/nr_hugepages_mempolicy + NrOvercommitHugepages *int64 // /proc/sys/vm/nr_overcommit_hugepages + NumaStat *int64 // /proc/sys/vm/numa_stat + NumaZonelistOrder string // /proc/sys/vm/numa_zonelist_order + OomDumpTasks *int64 // /proc/sys/vm/oom_dump_tasks + OomKillAllocatingTask *int64 // /proc/sys/vm/oom_kill_allocating_task + OvercommitKbytes *int64 // /proc/sys/vm/overcommit_kbytes + OvercommitMemory *int64 // /proc/sys/vm/overcommit_memory + OvercommitRatio *int64 // /proc/sys/vm/overcommit_ratio + PageCluster *int64 // /proc/sys/vm/page-cluster + PanicOnOom *int64 // /proc/sys/vm/panic_on_oom + PercpuPagelistFraction *int64 // /proc/sys/vm/percpu_pagelist_fraction + StatInterval *int64 // /proc/sys/vm/stat_interval + Swappiness *int64 // /proc/sys/vm/swappiness + UserReserveKbytes *int64 // /proc/sys/vm/user_reserve_kbytes + VfsCachePressure *int64 // /proc/sys/vm/vfs_cache_pressure + WatermarkBoostFactor *int64 // /proc/sys/vm/watermark_boost_factor + WatermarkScaleFactor *int64 // /proc/sys/vm/watermark_scale_factor + ZoneReclaimMode *int64 // /proc/sys/vm/zone_reclaim_mode +} + +// VM reads the VM statistics from the specified `proc` filesystem. +func (fs FS) VM() (*VM, error) { + path := fs.proc.Path("sys/vm") + file, err := os.Stat(path) + if err != nil { + return nil, err + } + if !file.Mode().IsDir() { + return nil, fmt.Errorf("%s is not a directory", path) + } + + files, err := ioutil.ReadDir(path) + if err != nil { + return nil, err + } + + var vm VM + for _, f := range files { + if f.IsDir() { + continue + } + + name := filepath.Join(path, f.Name()) + // ignore errors on read, as there are some write only + // in /proc/sys/vm + value, err := util.SysReadFile(name) + if err != nil { + continue + } + vp := util.NewValueParser(value) + + switch f.Name() { + case "admin_reserve_kbytes": + vm.AdminReserveKbytes = vp.PInt64() + case "block_dump": + vm.BlockDump = vp.PInt64() + case "compact_unevictable_allowed": + vm.CompactUnevictableAllowed = vp.PInt64() + case "dirty_background_bytes": + vm.DirtyBackgroundBytes = vp.PInt64() + case "dirty_background_ratio": + vm.DirtyBackgroundRatio = vp.PInt64() + case "dirty_bytes": + vm.DirtyBytes = vp.PInt64() + case "dirty_expire_centisecs": + vm.DirtyExpireCentisecs = vp.PInt64() + case "dirty_ratio": + vm.DirtyRatio = vp.PInt64() + case "dirtytime_expire_seconds": + vm.DirtytimeExpireSeconds = vp.PInt64() + case "dirty_writeback_centisecs": + vm.DirtyWritebackCentisecs = vp.PInt64() + case "drop_caches": + vm.DropCaches = vp.PInt64() + case "extfrag_threshold": + vm.ExtfragThreshold = vp.PInt64() + case "hugetlb_shm_group": + vm.HugetlbShmGroup = vp.PInt64() + case "laptop_mode": + vm.LaptopMode = vp.PInt64() + case "legacy_va_layout": + vm.LegacyVaLayout = vp.PInt64() + case "lowmem_reserve_ratio": + stringSlice := strings.Fields(value) + pint64Slice := make([]*int64, 0, len(stringSlice)) + for _, value := range stringSlice { + vp := util.NewValueParser(value) + pint64Slice = append(pint64Slice, vp.PInt64()) + } + vm.LowmemReserveRatio = pint64Slice + case "max_map_count": + vm.MaxMapCount = vp.PInt64() + case "memory_failure_early_kill": + vm.MemoryFailureEarlyKill = vp.PInt64() + case "memory_failure_recovery": + vm.MemoryFailureRecovery = vp.PInt64() + case "min_free_kbytes": + vm.MinFreeKbytes = vp.PInt64() + case "min_slab_ratio": + vm.MinSlabRatio = vp.PInt64() + case "min_unmapped_ratio": + vm.MinUnmappedRatio = vp.PInt64() + case "mmap_min_addr": + vm.MmapMinAddr = vp.PInt64() + case "nr_hugepages": + vm.NrHugepages = vp.PInt64() + case "nr_hugepages_mempolicy": + vm.NrHugepagesMempolicy = vp.PInt64() + case "nr_overcommit_hugepages": + vm.NrOvercommitHugepages = vp.PInt64() + case "numa_stat": + vm.NumaStat = vp.PInt64() + case "numa_zonelist_order": + vm.NumaZonelistOrder = value + case "oom_dump_tasks": + vm.OomDumpTasks = vp.PInt64() + case "oom_kill_allocating_task": + vm.OomKillAllocatingTask = vp.PInt64() + case "overcommit_kbytes": + vm.OvercommitKbytes = vp.PInt64() + case "overcommit_memory": + vm.OvercommitMemory = vp.PInt64() + case "overcommit_ratio": + vm.OvercommitRatio = vp.PInt64() + case "page-cluster": + vm.PageCluster = vp.PInt64() + case "panic_on_oom": + vm.PanicOnOom = vp.PInt64() + case "percpu_pagelist_fraction": + vm.PercpuPagelistFraction = vp.PInt64() + case "stat_interval": + vm.StatInterval = vp.PInt64() + case "swappiness": + vm.Swappiness = vp.PInt64() + case "user_reserve_kbytes": + vm.UserReserveKbytes = vp.PInt64() + case "vfs_cache_pressure": + vm.VfsCachePressure = vp.PInt64() + case "watermark_boost_factor": + vm.WatermarkBoostFactor = vp.PInt64() + case "watermark_scale_factor": + vm.WatermarkScaleFactor = vp.PInt64() + case "zone_reclaim_mode": + vm.ZoneReclaimMode = vp.PInt64() + } + if err := vp.Err(); err != nil { + return nil, err + } + } + + return &vm, nil +} diff --git a/vendor/github.com/prometheus/procfs/xfrm.go b/vendor/github.com/prometheus/procfs/xfrm.go new file mode 100644 index 00000000..eed07c7d --- /dev/null +++ b/vendor/github.com/prometheus/procfs/xfrm.go @@ -0,0 +1,186 @@ +// Copyright 2017 Prometheus Team +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package procfs + +import ( + "bufio" + "fmt" + "os" + "strconv" + "strings" +) + +// XfrmStat models the contents of /proc/net/xfrm_stat. +type XfrmStat struct { + // All errors which are not matched by other + XfrmInError int + // No buffer is left + XfrmInBufferError int + // Header Error + XfrmInHdrError int + // No state found + // i.e. either inbound SPI, address, or IPSEC protocol at SA is wrong + XfrmInNoStates int + // Transformation protocol specific error + // e.g. SA Key is wrong + XfrmInStateProtoError int + // Transformation mode specific error + XfrmInStateModeError int + // Sequence error + // e.g. sequence number is out of window + XfrmInStateSeqError int + // State is expired + XfrmInStateExpired int + // State has mismatch option + // e.g. UDP encapsulation type is mismatched + XfrmInStateMismatch int + // State is invalid + XfrmInStateInvalid int + // No matching template for states + // e.g. Inbound SAs are correct but SP rule is wrong + XfrmInTmplMismatch int + // No policy is found for states + // e.g. Inbound SAs are correct but no SP is found + XfrmInNoPols int + // Policy discards + XfrmInPolBlock int + // Policy error + XfrmInPolError int + // All errors which are not matched by others + XfrmOutError int + // Bundle generation error + XfrmOutBundleGenError int + // Bundle check error + XfrmOutBundleCheckError int + // No state was found + XfrmOutNoStates int + // Transformation protocol specific error + XfrmOutStateProtoError int + // Transportation mode specific error + XfrmOutStateModeError int + // Sequence error + // i.e sequence number overflow + XfrmOutStateSeqError int + // State is expired + XfrmOutStateExpired int + // Policy discads + XfrmOutPolBlock int + // Policy is dead + XfrmOutPolDead int + // Policy Error + XfrmOutPolError int + XfrmFwdHdrError int + XfrmOutStateInvalid int + XfrmAcquireError int +} + +// NewXfrmStat reads the xfrm_stat statistics. +func NewXfrmStat() (XfrmStat, error) { + fs, err := NewFS(DefaultMountPoint) + if err != nil { + return XfrmStat{}, err + } + + return fs.NewXfrmStat() +} + +// NewXfrmStat reads the xfrm_stat statistics from the 'proc' filesystem. +func (fs FS) NewXfrmStat() (XfrmStat, error) { + file, err := os.Open(fs.proc.Path("net/xfrm_stat")) + if err != nil { + return XfrmStat{}, err + } + defer file.Close() + + var ( + x = XfrmStat{} + s = bufio.NewScanner(file) + ) + + for s.Scan() { + fields := strings.Fields(s.Text()) + + if len(fields) != 2 { + return XfrmStat{}, fmt.Errorf("couldn't parse %q line %q", file.Name(), s.Text()) + } + + name := fields[0] + value, err := strconv.Atoi(fields[1]) + if err != nil { + return XfrmStat{}, err + } + + switch name { + case "XfrmInError": + x.XfrmInError = value + case "XfrmInBufferError": + x.XfrmInBufferError = value + case "XfrmInHdrError": + x.XfrmInHdrError = value + case "XfrmInNoStates": + x.XfrmInNoStates = value + case "XfrmInStateProtoError": + x.XfrmInStateProtoError = value + case "XfrmInStateModeError": + x.XfrmInStateModeError = value + case "XfrmInStateSeqError": + x.XfrmInStateSeqError = value + case "XfrmInStateExpired": + x.XfrmInStateExpired = value + case "XfrmInStateInvalid": + x.XfrmInStateInvalid = value + case "XfrmInTmplMismatch": + x.XfrmInTmplMismatch = value + case "XfrmInNoPols": + x.XfrmInNoPols = value + case "XfrmInPolBlock": + x.XfrmInPolBlock = value + case "XfrmInPolError": + x.XfrmInPolError = value + case "XfrmOutError": + x.XfrmOutError = value + case "XfrmInStateMismatch": + x.XfrmInStateMismatch = value + case "XfrmOutBundleGenError": + x.XfrmOutBundleGenError = value + case "XfrmOutBundleCheckError": + x.XfrmOutBundleCheckError = value + case "XfrmOutNoStates": + x.XfrmOutNoStates = value + case "XfrmOutStateProtoError": + x.XfrmOutStateProtoError = value + case "XfrmOutStateModeError": + x.XfrmOutStateModeError = value + case "XfrmOutStateSeqError": + x.XfrmOutStateSeqError = value + case "XfrmOutStateExpired": + x.XfrmOutStateExpired = value + case "XfrmOutPolBlock": + x.XfrmOutPolBlock = value + case "XfrmOutPolDead": + x.XfrmOutPolDead = value + case "XfrmOutPolError": + x.XfrmOutPolError = value + case "XfrmFwdHdrError": + x.XfrmFwdHdrError = value + case "XfrmOutStateInvalid": + x.XfrmOutStateInvalid = value + case "XfrmAcquireError": + x.XfrmAcquireError = value + } + + } + + return x, s.Err() +} diff --git a/vendor/github.com/prometheus/procfs/zoneinfo.go b/vendor/github.com/prometheus/procfs/zoneinfo.go new file mode 100644 index 00000000..0b9bb679 --- /dev/null +++ b/vendor/github.com/prometheus/procfs/zoneinfo.go @@ -0,0 +1,196 @@ +// Copyright 2019 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +// +build !windows + +package procfs + +import ( + "bytes" + "fmt" + "io/ioutil" + "regexp" + "strings" + + "github.com/prometheus/procfs/internal/util" +) + +// Zoneinfo holds info parsed from /proc/zoneinfo. +type Zoneinfo struct { + Node string + Zone string + NrFreePages *int64 + Min *int64 + Low *int64 + High *int64 + Scanned *int64 + Spanned *int64 + Present *int64 + Managed *int64 + NrActiveAnon *int64 + NrInactiveAnon *int64 + NrIsolatedAnon *int64 + NrAnonPages *int64 + NrAnonTransparentHugepages *int64 + NrActiveFile *int64 + NrInactiveFile *int64 + NrIsolatedFile *int64 + NrFilePages *int64 + NrSlabReclaimable *int64 + NrSlabUnreclaimable *int64 + NrMlockStack *int64 + NrKernelStack *int64 + NrMapped *int64 + NrDirty *int64 + NrWriteback *int64 + NrUnevictable *int64 + NrShmem *int64 + NrDirtied *int64 + NrWritten *int64 + NumaHit *int64 + NumaMiss *int64 + NumaForeign *int64 + NumaInterleave *int64 + NumaLocal *int64 + NumaOther *int64 + Protection []*int64 +} + +var nodeZoneRE = regexp.MustCompile(`(\d+), zone\s+(\w+)`) + +// Zoneinfo parses an zoneinfo-file (/proc/zoneinfo) and returns a slice of +// structs containing the relevant info. More information available here: +// https://www.kernel.org/doc/Documentation/sysctl/vm.txt +func (fs FS) Zoneinfo() ([]Zoneinfo, error) { + data, err := ioutil.ReadFile(fs.proc.Path("zoneinfo")) + if err != nil { + return nil, fmt.Errorf("error reading zoneinfo %q: %w", fs.proc.Path("zoneinfo"), err) + } + zoneinfo, err := parseZoneinfo(data) + if err != nil { + return nil, fmt.Errorf("error parsing zoneinfo %q: %w", fs.proc.Path("zoneinfo"), err) + } + return zoneinfo, nil +} + +func parseZoneinfo(zoneinfoData []byte) ([]Zoneinfo, error) { + + zoneinfo := []Zoneinfo{} + + zoneinfoBlocks := bytes.Split(zoneinfoData, []byte("\nNode")) + for _, block := range zoneinfoBlocks { + var zoneinfoElement Zoneinfo + lines := strings.Split(string(block), "\n") + for _, line := range lines { + + if nodeZone := nodeZoneRE.FindStringSubmatch(line); nodeZone != nil { + zoneinfoElement.Node = nodeZone[1] + zoneinfoElement.Zone = nodeZone[2] + continue + } + if strings.HasPrefix(strings.TrimSpace(line), "per-node stats") { + zoneinfoElement.Zone = "" + continue + } + parts := strings.Fields(strings.TrimSpace(line)) + if len(parts) < 2 { + continue + } + vp := util.NewValueParser(parts[1]) + switch parts[0] { + case "nr_free_pages": + zoneinfoElement.NrFreePages = vp.PInt64() + case "min": + zoneinfoElement.Min = vp.PInt64() + case "low": + zoneinfoElement.Low = vp.PInt64() + case "high": + zoneinfoElement.High = vp.PInt64() + case "scanned": + zoneinfoElement.Scanned = vp.PInt64() + case "spanned": + zoneinfoElement.Spanned = vp.PInt64() + case "present": + zoneinfoElement.Present = vp.PInt64() + case "managed": + zoneinfoElement.Managed = vp.PInt64() + case "nr_active_anon": + zoneinfoElement.NrActiveAnon = vp.PInt64() + case "nr_inactive_anon": + zoneinfoElement.NrInactiveAnon = vp.PInt64() + case "nr_isolated_anon": + zoneinfoElement.NrIsolatedAnon = vp.PInt64() + case "nr_anon_pages": + zoneinfoElement.NrAnonPages = vp.PInt64() + case "nr_anon_transparent_hugepages": + zoneinfoElement.NrAnonTransparentHugepages = vp.PInt64() + case "nr_active_file": + zoneinfoElement.NrActiveFile = vp.PInt64() + case "nr_inactive_file": + zoneinfoElement.NrInactiveFile = vp.PInt64() + case "nr_isolated_file": + zoneinfoElement.NrIsolatedFile = vp.PInt64() + case "nr_file_pages": + zoneinfoElement.NrFilePages = vp.PInt64() + case "nr_slab_reclaimable": + zoneinfoElement.NrSlabReclaimable = vp.PInt64() + case "nr_slab_unreclaimable": + zoneinfoElement.NrSlabUnreclaimable = vp.PInt64() + case "nr_mlock_stack": + zoneinfoElement.NrMlockStack = vp.PInt64() + case "nr_kernel_stack": + zoneinfoElement.NrKernelStack = vp.PInt64() + case "nr_mapped": + zoneinfoElement.NrMapped = vp.PInt64() + case "nr_dirty": + zoneinfoElement.NrDirty = vp.PInt64() + case "nr_writeback": + zoneinfoElement.NrWriteback = vp.PInt64() + case "nr_unevictable": + zoneinfoElement.NrUnevictable = vp.PInt64() + case "nr_shmem": + zoneinfoElement.NrShmem = vp.PInt64() + case "nr_dirtied": + zoneinfoElement.NrDirtied = vp.PInt64() + case "nr_written": + zoneinfoElement.NrWritten = vp.PInt64() + case "numa_hit": + zoneinfoElement.NumaHit = vp.PInt64() + case "numa_miss": + zoneinfoElement.NumaMiss = vp.PInt64() + case "numa_foreign": + zoneinfoElement.NumaForeign = vp.PInt64() + case "numa_interleave": + zoneinfoElement.NumaInterleave = vp.PInt64() + case "numa_local": + zoneinfoElement.NumaLocal = vp.PInt64() + case "numa_other": + zoneinfoElement.NumaOther = vp.PInt64() + case "protection:": + protectionParts := strings.Split(line, ":") + protectionValues := strings.Replace(protectionParts[1], "(", "", 1) + protectionValues = strings.Replace(protectionValues, ")", "", 1) + protectionValues = strings.TrimSpace(protectionValues) + protectionStringMap := strings.Split(protectionValues, ", ") + val, err := util.ParsePInt64s(protectionStringMap) + if err == nil { + zoneinfoElement.Protection = val + } + } + + } + + zoneinfo = append(zoneinfo, zoneinfoElement) + } + return zoneinfo, nil +} diff --git a/vendor/modules.txt b/vendor/modules.txt index 302fd106..dec74e68 100644 --- a/vendor/modules.txt +++ b/vendor/modules.txt @@ -35,6 +35,10 @@ github.com/Microsoft/hcsshim/internal/wclayer github.com/Microsoft/hcsshim/internal/winapi github.com/Microsoft/hcsshim/osversion github.com/Microsoft/hcsshim/pkg/ociwclayer +# github.com/beorn7/perks v1.0.1 +github.com/beorn7/perks/quantile +# github.com/cespare/xxhash/v2 v2.1.1 +github.com/cespare/xxhash/v2 # github.com/containerd/cgroups v1.0.1 github.com/containerd/cgroups/stats/v1 # github.com/containerd/console v1.0.2 @@ -126,16 +130,20 @@ github.com/containerd/fuse-overlayfs-snapshotter github.com/containerd/go-cni # github.com/containerd/go-runc v1.0.0 github.com/containerd/go-runc -# github.com/containerd/stargz-snapshotter v0.4.1 +# github.com/containerd/stargz-snapshotter v0.5.0 github.com/containerd/stargz-snapshotter/cache github.com/containerd/stargz-snapshotter/fs github.com/containerd/stargz-snapshotter/fs/config +github.com/containerd/stargz-snapshotter/fs/layer +github.com/containerd/stargz-snapshotter/fs/metrics github.com/containerd/stargz-snapshotter/fs/reader github.com/containerd/stargz-snapshotter/fs/remote github.com/containerd/stargz-snapshotter/fs/source github.com/containerd/stargz-snapshotter/snapshot github.com/containerd/stargz-snapshotter/task -# github.com/containerd/stargz-snapshotter/estargz v0.4.1 +github.com/containerd/stargz-snapshotter/util/lrucache +github.com/containerd/stargz-snapshotter/util/namedmutex +# github.com/containerd/stargz-snapshotter/estargz v0.5.0 github.com/containerd/stargz-snapshotter/estargz github.com/containerd/stargz-snapshotter/estargz/errorutil # github.com/containerd/ttrpc v1.0.2 @@ -214,6 +222,8 @@ github.com/docker/go-connections/sockets github.com/docker/go-connections/tlsconfig # github.com/docker/go-events v0.0.0-20190806004212-e31b211e4f1c github.com/docker/go-events +# github.com/docker/go-metrics v0.0.1 +github.com/docker/go-metrics # github.com/docker/go-units v0.4.0 github.com/docker/go-units # github.com/docker/libnetwork v0.8.0-dev.2.0.20201215162534-fa125a3512ee @@ -275,6 +285,8 @@ github.com/klauspost/compress/huff0 github.com/klauspost/compress/snappy github.com/klauspost/compress/zstd github.com/klauspost/compress/zstd/internal/xxhash +# github.com/matttproud/golang_protobuf_extensions v1.0.2-0.20181231171920-c182affec369 +github.com/matttproud/golang_protobuf_extensions/pbutil # github.com/mitchellh/hashstructure v1.0.0 github.com/mitchellh/hashstructure # github.com/moby/locker v1.0.1 @@ -314,6 +326,20 @@ github.com/pkg/errors github.com/pkg/profile # github.com/pmezard/go-difflib v1.0.0 github.com/pmezard/go-difflib/difflib +# github.com/prometheus/client_golang v1.7.1 +github.com/prometheus/client_golang/prometheus +github.com/prometheus/client_golang/prometheus/internal +github.com/prometheus/client_golang/prometheus/promhttp +# github.com/prometheus/client_model v0.2.0 +github.com/prometheus/client_model/go +# github.com/prometheus/common v0.10.0 +github.com/prometheus/common/expfmt +github.com/prometheus/common/internal/bitbucket.org/ww/goautoneg +github.com/prometheus/common/model +# github.com/prometheus/procfs v0.6.0 +github.com/prometheus/procfs +github.com/prometheus/procfs/internal/fs +github.com/prometheus/procfs/internal/util # github.com/russross/blackfriday/v2 v2.0.1 github.com/russross/blackfriday/v2 # github.com/serialx/hashring v0.0.0-20190422032157-8b2912629002