massive doc updates
* examples/kubernetes: newly added * docs/rootless.md: cleaned up for better readability * examples/README.md: split out from the main README.md * examples/build-using-dockerfile/README.md: split out from the main README.md * README.md: add TOC using https://github.com/thlorenz/doctoc * README.md: add mTLS configuration (relates to #1074) * README.md: add more adoptions * README.md: add inline cache (fix #976) Signed-off-by: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp>v0.7
Akihiro Suda
parent
170ab6fad1
commit
1bde5d99d5
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@ -1,2 +1,3 @@
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bin
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bin
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.certs
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.tmp
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.tmp
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@ -61,6 +61,11 @@ make && sudo make install
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You can also use `make binaries-all` to prepare `buildkitd.containerd_only` and `buildkitd.oci_only`.
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You can also use `make binaries-all` to prepare `buildkitd.containerd_only` and `buildkitd.oci_only`.
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To build containerized `moby/buildkit:local` and `moby/buildkit:local-rootless` images:
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```bash
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make images
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```
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### Run the unit- and integration-tests
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### Run the unit- and integration-tests
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Running tests:
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Running tests:
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@ -1,3 +1,4 @@
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bin
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bin
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release-out
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.certs
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.tmp
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.tmp
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release-out
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360
README.md
360
README.md
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@ -1,6 +1,6 @@
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[](https://asciinema.org/a/gPEIEo1NzmDTUu2bEPsUboqmU)
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[](https://asciinema.org/a/gPEIEo1NzmDTUu2bEPsUboqmU)
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## BuildKit
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# BuildKit
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[](https://godoc.org/github.com/moby/buildkit/client/llb)
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[](https://godoc.org/github.com/moby/buildkit/client/llb)
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||||||
[](https://travis-ci.org/moby/buildkit)
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[](https://travis-ci.org/moby/buildkit)
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@ -25,49 +25,107 @@ Read the proposal from https://github.com/moby/moby/issues/32925
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Introductory blog post https://blog.mobyproject.org/introducing-buildkit-17e056cc5317
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Introductory blog post https://blog.mobyproject.org/introducing-buildkit-17e056cc5317
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Join `#buildkit` channel on [Docker Community Slack](http://dockr.ly/slack)
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:information_source: If you are visiting this repo for the usage of experimental Dockerfile features like `RUN --mount=type=(bind|cache|tmpfs|secret|ssh)`, please refer to [`frontend/dockerfile/docs/experimental.md`](frontend/dockerfile/docs/experimental.md).
|
:information_source: If you are visiting this repo for the usage of experimental Dockerfile features like `RUN --mount=type=(bind|cache|tmpfs|secret|ssh)`, please refer to [`frontend/dockerfile/docs/experimental.md`](frontend/dockerfile/docs/experimental.md).
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### Used by
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:information_source: [BuildKit has been integrated to `docker build` since Docker 18.06 .](https://docs.docker.com/develop/develop-images/build_enhancements/)
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You don't need to read this document unless you want to use the full-featured standalone version of BuildKit.
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<!-- START doctoc generated TOC please keep comment here to allow auto update -->
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<!-- DON'T EDIT THIS SECTION, INSTEAD RE-RUN doctoc TO UPDATE -->
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- [Used by](#used-by)
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- [Quick start](#quick-start)
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- [Starting the `buildkitd` daemon:](#starting-the-buildkitd-daemon)
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- [Exploring LLB](#exploring-llb)
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- [Exploring Dockerfiles](#exploring-dockerfiles)
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- [Building a Dockerfile with `buildctl`](#building-a-dockerfile-with-buildctl)
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- [Building a Dockerfile using external frontend:](#building-a-dockerfile-using-external-frontend)
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- [Building a Dockerfile with experimental features like `RUN --mount=type=(bind|cache|tmpfs|secret|ssh)`](#building-a-dockerfile-with-experimental-features-like-run---mounttypebindcachetmpfssecretssh)
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- [Output](#output)
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- [Registry](#registry)
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- [Local directory](#local-directory)
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- [Docker tarball](#docker-tarball)
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- [OCI tarball](#oci-tarball)
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- [containerd image store](#containerd-image-store)
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- [Cache](#cache)
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- [Garbage collection](#garbage-collection)
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- [Export cache](#export-cache)
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- [Inline (push image and cache together)](#inline-push-image-and-cache-together)
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- [Registry (push image and cache separately)](#registry-push-image-and-cache-separately)
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- [Local directory](#local-directory-1)
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- [`--export-cache` options](#--export-cache-options)
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- [`--import-cache` options](#--import-cache-options)
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- [Consistent hashing](#consistent-hashing)
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- [Expose BuildKit as a TCP service](#expose-buildkit-as-a-tcp-service)
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- [Load balancing](#load-balancing)
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- [Containerizing BuildKit](#containerizing-buildkit)
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- [Kubernetes](#kubernetes)
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- [Daemonless](#daemonless)
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- [Opentracing support](#opentracing-support)
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- [Running BuildKit without root privileges](#running-buildkit-without-root-privileges)
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- [Building multi-platform images](#building-multi-platform-images)
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- [Contributing](#contributing)
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|
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|
<!-- END doctoc generated TOC please keep comment here to allow auto update -->
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|
## Used by
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|
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BuildKit is used by the following projects:
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BuildKit is used by the following projects:
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|
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- [Moby & Docker](https://github.com/moby/moby/pull/37151)
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- [Moby & Docker](https://github.com/moby/moby/pull/37151) (`DOCKER_BUILDKIT=1 docker build`)
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- [img](https://github.com/genuinetools/img)
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- [img](https://github.com/genuinetools/img)
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- [OpenFaaS Cloud](https://github.com/openfaas/openfaas-cloud)
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- [OpenFaaS Cloud](https://github.com/openfaas/openfaas-cloud)
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- [container build interface](https://github.com/containerbuilding/cbi)
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- [container build interface](https://github.com/containerbuilding/cbi)
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- [Knative Build Templates](https://github.com/knative/build-templates)
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- [Tekton Pipelines](https://github.com/tektoncd/catalog) (formerly [Knative Build Templates](https://github.com/knative/build-templates))
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- [the Sanic build tool](https://github.com/distributed-containers-inc/sanic)
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- [the Sanic build tool](https://github.com/distributed-containers-inc/sanic)
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- [vab](https://github.com/stellarproject/vab)
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- [vab](https://github.com/stellarproject/vab)
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- [Rio](https://github.com/rancher/rio)
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- [Rio](https://github.com/rancher/rio)
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- [PouchContainer](https://github.com/alibaba/pouch)
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- [Docker buildx](https://github.com/docker/buildx)
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### Quick start
|
## Quick start
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Dependencies:
|
:information_source: For Kubernetes deployments, see [`examples/kubernetes`](./examples/kubernetes).
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|
|
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|
BuildKit is composed of the `buildkitd` daemon and the `buildctl` client.
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|
While the `buildctl` client is available for Linux, macOS, and Windows, the `buildkitd` daemon is only available for Linux currently.
|
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|
|
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|
The `buildkitd` daemon requires the following components to be installed:
|
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- [runc](https://github.com/opencontainers/runc)
|
- [runc](https://github.com/opencontainers/runc)
|
||||||
- [containerd](https://github.com/containerd/containerd) (if you want to use containerd worker)
|
- [containerd](https://github.com/containerd/containerd) (if you want to use containerd worker)
|
||||||
|
|
||||||
The following command installs `buildkitd` and `buildctl` to `/usr/local/bin`:
|
The latest binaries of BuildKit are available [here](https://github.com/moby/buildkit/releases) for Linux, macOS, and Windows.
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|
|
||||||
```bash
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[Homebrew package](https://formulae.brew.sh/formula/buildkit) (unofficial) is available for macOS.
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$ make && sudo make install
|
```console
|
||||||
|
$ brew install buildkit
|
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```
|
```
|
||||||
|
|
||||||
You can also use `make binaries-all` to prepare `buildkitd.containerd_only` and `buildkitd.oci_only`.
|
To build BuildKit from source, see [`.github/CONTRIBUTING.md`](./.github/CONTRIBUTING.md).
|
||||||
|
|
||||||
#### Starting the buildkitd daemon:
|
### Starting the `buildkitd` daemon:
|
||||||
|
|
||||||
|
You need to run `buildkitd` as the root user on the host.
|
||||||
|
|
||||||
```bash
|
```bash
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buildkitd --debug --root /var/lib/buildkit
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$ sudo buildkitd
|
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```
|
```
|
||||||
|
|
||||||
|
To run `buildkitd` as a non-root user, see [`docs/rootless.md`](docs/rootless.md).
|
||||||
|
|
||||||
The buildkitd daemon supports two worker backends: OCI (runc) and containerd.
|
The buildkitd daemon supports two worker backends: OCI (runc) and containerd.
|
||||||
|
|
||||||
By default, the OCI (runc) worker is used. You can set `--oci-worker=false --containerd-worker=true` to use the containerd worker.
|
By default, the OCI (runc) worker is used. You can set `--oci-worker=false --containerd-worker=true` to use the containerd worker.
|
||||||
|
|
||||||
We are open to adding more backends.
|
We are open to adding more backends.
|
||||||
|
|
||||||
#### Exploring LLB
|
The buildkitd daemon listens gRPC API on `/run/buildkit/buildkitd.sock` by default, but you can also use TCP sockets.
|
||||||
|
See [Expose BuildKit as a TCP service](#expose-buildkit-as-a-tcp-service).
|
||||||
|
|
||||||
|
### Exploring LLB
|
||||||
|
|
||||||
BuildKit builds are based on a binary intermediate format called LLB that is used for defining the dependency graph for processes running part of your build. tl;dr: LLB is to Dockerfile what LLVM IR is to C.
|
BuildKit builds are based on a binary intermediate format called LLB that is used for defining the dependency graph for processes running part of your build. tl;dr: LLB is to Dockerfile what LLVM IR is to C.
|
||||||
|
|
||||||
|
|
@ -76,49 +134,23 @@ BuildKit builds are based on a binary intermediate format called LLB that is use
|
||||||
- Efficiently cacheable
|
- Efficiently cacheable
|
||||||
- Vendor-neutral (i.e. non-Dockerfile languages can be easily implemented)
|
- Vendor-neutral (i.e. non-Dockerfile languages can be easily implemented)
|
||||||
|
|
||||||
See [`solver/pb/ops.proto`](./solver/pb/ops.proto) for the format definition.
|
See [`solver/pb/ops.proto`](./solver/pb/ops.proto) for the format definition, and see [`./examples/README.md`](./examples/README.md) for example LLB applications.
|
||||||
|
|
||||||
Currently, following high-level languages has been implemented for LLB:
|
Currently, the following high-level languages has been implemented for LLB:
|
||||||
|
|
||||||
- Dockerfile (See [Exploring Dockerfiles](#exploring-dockerfiles))
|
- Dockerfile (See [Exploring Dockerfiles](#exploring-dockerfiles))
|
||||||
- [Buildpacks](https://github.com/tonistiigi/buildkit-pack)
|
- [Buildpacks](https://github.com/tonistiigi/buildkit-pack)
|
||||||
|
- [Mockerfile](https://matt-rickard.com/building-a-new-dockerfile-frontend/)
|
||||||
|
- [Gockerfile](https://github.com/po3rin/gockerfile)
|
||||||
- (open a PR to add your own language)
|
- (open a PR to add your own language)
|
||||||
|
|
||||||
For understanding the basics of LLB, `examples/buildkit*` directory contains scripts that define how to build different configurations of BuildKit itself and its dependencies using the `client` package. Running one of these scripts generates a protobuf definition of a build graph. Note that the script itself does not execute any steps of the build.
|
### Exploring Dockerfiles
|
||||||
|
|
||||||
You can use `buildctl debug dump-llb` to see what data is in this definition. Add `--dot` to generate dot layout.
|
Frontends are components that run inside BuildKit and convert any build definition to LLB. There is a special frontend called gateway (`gateway.v0`) that allows using any image as a frontend.
|
||||||
|
|
||||||
```bash
|
During development, Dockerfile frontend (`dockerfile.v0`) is also part of the BuildKit repo. In the future, this will be moved out, and Dockerfiles can be built using an external image.
|
||||||
go run examples/buildkit0/buildkit.go \
|
|
||||||
| buildctl debug dump-llb \
|
|
||||||
| jq .
|
|
||||||
```
|
|
||||||
|
|
||||||
To start building use `buildctl build` command. The example script accepts `--with-containerd` flag to choose if containerd binaries and support should be included in the end result as well.
|
#### Building a Dockerfile with `buildctl`
|
||||||
|
|
||||||
```bash
|
|
||||||
go run examples/buildkit0/buildkit.go \
|
|
||||||
| buildctl build
|
|
||||||
```
|
|
||||||
|
|
||||||
`buildctl build` will show interactive progress bar by default while the build job is running. If the path to the trace file is specified, the trace file generated will contain all information about the timing of the individual steps and logs.
|
|
||||||
|
|
||||||
Different versions of the example scripts show different ways of describing the build definition for this project to show the capabilities of the library. New versions have been added when new features have become available.
|
|
||||||
|
|
||||||
- `./examples/buildkit0` - uses only exec operations, defines a full stage per component.
|
|
||||||
- `./examples/buildkit1` - cloning git repositories has been separated for extra concurrency.
|
|
||||||
- `./examples/buildkit2` - uses git sources directly instead of running `git clone`, allowing better performance and much safer caching.
|
|
||||||
- `./examples/buildkit3` - allows using local source files for separate components eg. `./buildkit3 --runc=local | buildctl build --local runc-src=some/local/path`
|
|
||||||
- `./examples/dockerfile2llb` - can be used to convert a Dockerfile to LLB for debugging purposes
|
|
||||||
- `./examples/gobuild` - shows how to use nested invocation to generate LLB for Go package internal dependencies
|
|
||||||
|
|
||||||
#### Exploring Dockerfiles
|
|
||||||
|
|
||||||
Frontends are components that run inside BuildKit and convert any build definition to LLB. There is a special frontend called gateway (gateway.v0) that allows using any image as a frontend.
|
|
||||||
|
|
||||||
During development, Dockerfile frontend (dockerfile.v0) is also part of the BuildKit repo. In the future, this will be moved out, and Dockerfiles can be built using an external image.
|
|
||||||
|
|
||||||
##### Building a Dockerfile with `buildctl`
|
|
||||||
|
|
||||||
```bash
|
```bash
|
||||||
buildctl build \
|
buildctl build \
|
||||||
|
|
@ -136,22 +168,7 @@ buildctl build \
|
||||||
|
|
||||||
`--local` exposes local source files from client to the builder. `context` and `dockerfile` are the names Dockerfile frontend looks for build context and Dockerfile location.
|
`--local` exposes local source files from client to the builder. `context` and `dockerfile` are the names Dockerfile frontend looks for build context and Dockerfile location.
|
||||||
|
|
||||||
##### build-using-dockerfile utility
|
#### Building a Dockerfile using external frontend:
|
||||||
|
|
||||||
For people familiar with `docker build` command, there is an example wrapper utility in `./examples/build-using-dockerfile` that allows building Dockerfiles with BuildKit using a syntax similar to `docker build`.
|
|
||||||
|
|
||||||
```bash
|
|
||||||
go build ./examples/build-using-dockerfile \
|
|
||||||
&& sudo install build-using-dockerfile /usr/local/bin
|
|
||||||
|
|
||||||
build-using-dockerfile -t myimage .
|
|
||||||
build-using-dockerfile -t mybuildkit -f ./hack/dockerfiles/test.Dockerfile .
|
|
||||||
|
|
||||||
# build-using-dockerfile will automatically load the resulting image to Docker
|
|
||||||
docker inspect myimage
|
|
||||||
```
|
|
||||||
|
|
||||||
##### Building a Dockerfile using [external frontend](https://hub.docker.com/r/docker/dockerfile/tags/):
|
|
||||||
|
|
||||||
External versions of the Dockerfile frontend are pushed to https://hub.docker.com/r/docker/dockerfile-upstream and https://hub.docker.com/r/docker/dockerfile and can be used with the gateway frontend. The source for the external frontend is currently located in `./frontend/dockerfile/cmd/dockerfile-frontend` but will move out of this repository in the future ([#163](https://github.com/moby/buildkit/issues/163)). For automatic build from master branch of this repository `docker/dockerfile-upsteam:master` or `docker/dockerfile-upstream:master-experimental` image can be used.
|
External versions of the Dockerfile frontend are pushed to https://hub.docker.com/r/docker/dockerfile-upstream and https://hub.docker.com/r/docker/dockerfile and can be used with the gateway frontend. The source for the external frontend is currently located in `./frontend/dockerfile/cmd/dockerfile-frontend` but will move out of this repository in the future ([#163](https://github.com/moby/buildkit/issues/163)). For automatic build from master branch of this repository `docker/dockerfile-upsteam:master` or `docker/dockerfile-upstream:master-experimental` image can be used.
|
||||||
|
|
||||||
|
|
@ -168,7 +185,7 @@ buildctl build \
|
||||||
--opt build-arg:APT_MIRROR=cdn-fastly.deb.debian.org
|
--opt build-arg:APT_MIRROR=cdn-fastly.deb.debian.org
|
||||||
```
|
```
|
||||||
|
|
||||||
##### Building a Dockerfile with experimental features like `RUN --mount=type=(bind|cache|tmpfs|secret|ssh)`
|
#### Building a Dockerfile with experimental features like `RUN --mount=type=(bind|cache|tmpfs|secret|ssh)`
|
||||||
|
|
||||||
See [`frontend/dockerfile/docs/experimental.md`](frontend/dockerfile/docs/experimental.md).
|
See [`frontend/dockerfile/docs/experimental.md`](frontend/dockerfile/docs/experimental.md).
|
||||||
|
|
||||||
|
|
@ -176,24 +193,26 @@ See [`frontend/dockerfile/docs/experimental.md`](frontend/dockerfile/docs/experi
|
||||||
|
|
||||||
By default, the build result and intermediate cache will only remain internally in BuildKit. An output needs to be specified to retrieve the result.
|
By default, the build result and intermediate cache will only remain internally in BuildKit. An output needs to be specified to retrieve the result.
|
||||||
|
|
||||||
##### Exporting resulting image to containerd
|
#### Registry
|
||||||
|
|
||||||
The containerd worker needs to be used
|
|
||||||
|
|
||||||
```bash
|
|
||||||
buildctl build ... --output type=image,name=docker.io/username/image
|
|
||||||
ctr --namespace=buildkit images ls
|
|
||||||
```
|
|
||||||
|
|
||||||
##### Push resulting image to registry
|
|
||||||
|
|
||||||
```bash
|
```bash
|
||||||
buildctl build ... --output type=image,name=docker.io/username/image,push=true
|
buildctl build ... --output type=image,name=docker.io/username/image,push=true
|
||||||
```
|
```
|
||||||
|
|
||||||
If credentials are required, `buildctl` will attempt to read Docker configuration file.
|
To export and import the cache along with the image, you need to specify `--export-cache type=inline` and `--import-cache type=registry,ref=...`.
|
||||||
|
See [Export cache](#export-cache).
|
||||||
|
|
||||||
##### Exporting build result back to client
|
```bash
|
||||||
|
buildctl build ...\
|
||||||
|
--output type=image,name=docker.io/username/image,push=true \
|
||||||
|
--export-cache type=inline \
|
||||||
|
--import-cache type=registry,ref=docker.io/username/image
|
||||||
|
```
|
||||||
|
|
||||||
|
If credentials are required, `buildctl` will attempt to read Docker configuration file `$DOCKER_CONFIG/config.json`.
|
||||||
|
`$DOCKER_CONFIG` defaults to `~/.docker`.
|
||||||
|
|
||||||
|
#### Local directory
|
||||||
|
|
||||||
The local client will copy the files directly to the client. This is useful if BuildKit is being used for building something else than container images.
|
The local client will copy the files directly to the client. This is useful if BuildKit is being used for building something else than container images.
|
||||||
|
|
||||||
|
|
@ -222,70 +241,150 @@ buildctl build ... --output type=tar,dest=out.tar
|
||||||
buildctl build ... --output type=tar > out.tar
|
buildctl build ... --output type=tar > out.tar
|
||||||
```
|
```
|
||||||
|
|
||||||
##### Exporting built image to Docker
|
#### Docker tarball
|
||||||
|
|
||||||
```bash
|
```bash
|
||||||
# exported tarball is also compatible with OCI spec
|
# exported tarball is also compatible with OCI spec
|
||||||
buildctl build ... --output type=docker,name=myimage | docker load
|
buildctl build ... --output type=docker,name=myimage | docker load
|
||||||
```
|
```
|
||||||
|
|
||||||
##### Exporting [OCI Image Format](https://github.com/opencontainers/image-spec) tarball to client
|
#### OCI tarball
|
||||||
|
|
||||||
```bash
|
```bash
|
||||||
buildctl build ... --output type=oci,dest=path/to/output.tar
|
buildctl build ... --output type=oci,dest=path/to/output.tar
|
||||||
buildctl build ... --output type=oci > output.tar
|
buildctl build ... --output type=oci > output.tar
|
||||||
```
|
```
|
||||||
|
#### containerd image store
|
||||||
|
|
||||||
### Exporting/Importing build cache (not image itself)
|
The containerd worker needs to be used
|
||||||
|
|
||||||
#### To/From registry
|
|
||||||
|
|
||||||
```bash
|
```bash
|
||||||
buildctl build ... --export-cache type=registry,ref=localhost:5000/myrepo:buildcache
|
buildctl build ... --output type=image,name=docker.io/username/image
|
||||||
buildctl build ... --import-cache type=registry,ref=localhost:5000/myrepo:buildcache
|
ctr --namespace=buildkit images ls
|
||||||
```
|
```
|
||||||
|
|
||||||
#### To/From local filesystem
|
To change the containerd namespace, you need to change `worker.containerd.namespace` in [`/etc/buildkit/buildkitd.toml`](./docs/buildkitd.toml.md).
|
||||||
|
|
||||||
```bash
|
|
||||||
buildctl build ... --export-cache type=local,dest=path/to/output-dir
|
|
||||||
buildctl build ... --import-cache type=local,src=path/to/input-dir
|
|
||||||
```
|
|
||||||
|
|
||||||
The directory layout conforms to OCI Image Spec v1.0.
|
## Cache
|
||||||
|
|
||||||
#### `--export-cache` options
|
To show local build cache (`/var/lib/buildkit`):
|
||||||
|
|
||||||
- `mode=min` (default): only export layers for the resulting image
|
|
||||||
- `mode=max`: export all the layers of all intermediate steps
|
|
||||||
- `ref=docker.io/user/image:tag`: reference for `registry` cache exporter
|
|
||||||
- `dest=path/to/output-dir`: directory for `local` cache exporter
|
|
||||||
|
|
||||||
#### `--import-cache` options
|
|
||||||
|
|
||||||
- `ref=docker.io/user/image:tag`: reference for `registry` cache importer
|
|
||||||
- `src=path/to/input-dir`: directory for `local` cache importer
|
|
||||||
- `digest=sha256:deadbeef`: digest of the manifest list to import for `local` cache importer. Defaults to the digest of "latest" tag in `index.json`
|
|
||||||
|
|
||||||
### Other
|
|
||||||
|
|
||||||
#### View build cache
|
|
||||||
|
|
||||||
```bash
|
```bash
|
||||||
buildctl du -v
|
buildctl du -v
|
||||||
```
|
```
|
||||||
|
|
||||||
#### Show enabled workers
|
To prune local build cache:
|
||||||
|
|
||||||
```bash
|
```bash
|
||||||
buildctl debug workers -v
|
buildctl prune
|
||||||
```
|
```
|
||||||
|
|
||||||
### Running containerized buildkit
|
### Garbage collection
|
||||||
|
|
||||||
BuildKit can also be used by running the `buildkitd` daemon inside a Docker container and accessing it remotely. The client tool `buildctl` is also available for Mac and Windows.
|
See [`./docs/buildkitd.toml.md`](./docs/buildkitd.toml.md).
|
||||||
|
|
||||||
We provide `buildkitd` container images as [`moby/buildkit`](https://hub.docker.com/r/moby/buildkit/tags/):
|
### Export cache
|
||||||
|
|
||||||
|
BuildKit supports the following cache exporters:
|
||||||
|
* `inline`: embed the cache into the image, and push them to the registry together
|
||||||
|
* `registry`: push the image and the cache separately
|
||||||
|
* `local`: export to a local directory
|
||||||
|
|
||||||
|
In most case you want to use the `inline` cache exporter.
|
||||||
|
However, note that the `inline` cache exporter only supports `min` cache mode.
|
||||||
|
To enable `max` cache mode, push the image and the cache separately by using `registry` cache exporter.
|
||||||
|
|
||||||
|
#### Inline (push image and cache together)
|
||||||
|
|
||||||
|
```bash
|
||||||
|
buildctl build ... \
|
||||||
|
--output type=image,name=docker.io/username/image,push=true \
|
||||||
|
--export-cache type=inline \
|
||||||
|
--import-cache type=registry,ref=docker.io/username/image
|
||||||
|
```
|
||||||
|
|
||||||
|
Note that the inline cache is not imported unless `--import-cache type=registry,ref=...` is provided.
|
||||||
|
|
||||||
|
:information_source: Docker-integrated BuildKit (`DOCKER_BUILDKIT=1 docker build`) and `docker buildx`requires
|
||||||
|
`--build-arg BUILDKIT_INLINE_CACHE=1` to be specified to enable the `inline` cache exporter.
|
||||||
|
However, the standalone `buildctl` does NOT require `--opt build-arg:BUILDKIT_INLINE_CACHE=1` and the build-arg is simply ignored.
|
||||||
|
|
||||||
|
#### Registry (push image and cache separately)
|
||||||
|
|
||||||
|
```bash
|
||||||
|
buildctl build ... \
|
||||||
|
--output type=image,name=localhost:5000/myrepo:image,push=true \
|
||||||
|
--export-cache type=registry,ref=localhost:5000/myrepo:buildcache \
|
||||||
|
--import-cache type=registry,ref=localhost:5000/myrepo:buildcache \
|
||||||
|
```
|
||||||
|
|
||||||
|
#### Local directory
|
||||||
|
|
||||||
|
```bash
|
||||||
|
buildctl build ... --export-cache type=local,dest=path/to/output-dir
|
||||||
|
buildctl build ... --import-cache type=local,src=path/to/input-dir,digest=sha256:deadbeef
|
||||||
|
```
|
||||||
|
|
||||||
|
The directory layout conforms to OCI Image Spec v1.0.
|
||||||
|
|
||||||
|
Currently, you need to specify the `digest` of the manifest list to import for `local` cache importer.
|
||||||
|
This is planned to default to the digest of "latest" tag in `index.json` in future.
|
||||||
|
|
||||||
|
#### `--export-cache` options
|
||||||
|
- `type`: `inline`, `registry`, or `local`
|
||||||
|
- `mode=min` (default): only export layers for the resulting image
|
||||||
|
- `mode=max`: export all the layers of all intermediate steps. Not supported for `inline` cache exporter.
|
||||||
|
- `ref=docker.io/user/image:tag`: reference for `registry` cache exporter
|
||||||
|
- `dest=path/to/output-dir`: directory for `local` cache exporter
|
||||||
|
|
||||||
|
#### `--import-cache` options
|
||||||
|
- `type`: `registry` or `local`. Use `registry` to import `inline` cache.
|
||||||
|
- `ref=docker.io/user/image:tag`: reference for `registry` cache importer
|
||||||
|
- `src=path/to/input-dir`: directory for `local` cache importer
|
||||||
|
- `digest=sha256:deadbeef`: digest of the manifest list to import for `local` cache importer.
|
||||||
|
|
||||||
|
### Consistent hashing
|
||||||
|
|
||||||
|
If you have multiple BuildKit daemon instances but you don't want to use registry for sharing cache across the cluster,
|
||||||
|
consider client-side load balancing using consistent hashing.
|
||||||
|
|
||||||
|
See [`./examples/kubernetes/consistenthash`](./examples/kubernetes/consistenthash).
|
||||||
|
|
||||||
|
## Expose BuildKit as a TCP service
|
||||||
|
|
||||||
|
The `buildkitd` daemon can listen the gRPC API on a TCP socket.
|
||||||
|
|
||||||
|
It is highly recommended to create TLS certificates for both the daemon and the client (mTLS).
|
||||||
|
Enabling TCP without mTLS is dangerous because the executor containers (aka Dockerfile `RUN` containers) can call BuildKit API as well.
|
||||||
|
|
||||||
|
```bash
|
||||||
|
buildkitd \
|
||||||
|
--addr tcp://0.0.0.0:1234 \
|
||||||
|
--tlscacert /path/to/ca.pem \
|
||||||
|
--tlscert /path/to/cert.pem \
|
||||||
|
--tlskey /path/to/key.pem
|
||||||
|
```
|
||||||
|
|
||||||
|
```bash
|
||||||
|
buildctl \
|
||||||
|
--addr tcp://example.com:1234 \
|
||||||
|
--tlscacert /path/to/ca.pem \
|
||||||
|
--tlscert /path/to/clientcert.pem \
|
||||||
|
--tlskey /path/to/clientkey.pem \
|
||||||
|
build ...
|
||||||
|
```
|
||||||
|
|
||||||
|
### Load balancing
|
||||||
|
|
||||||
|
`buildctl build` can be called against randomly load balanced the `buildkitd` daemon.
|
||||||
|
|
||||||
|
See also [Consistent hashing](#consistenthashing) for client-side load balancing.
|
||||||
|
|
||||||
|
## Containerizing BuildKit
|
||||||
|
|
||||||
|
BuildKit can also be used by running the `buildkitd` daemon inside a Docker container and accessing it remotely.
|
||||||
|
|
||||||
|
We provide the container images as [`moby/buildkit`](https://hub.docker.com/r/moby/buildkit/tags/):
|
||||||
|
|
||||||
- `moby/buildkit:latest`: built from the latest regular [release](https://github.com/moby/buildkit/releases)
|
- `moby/buildkit:latest`: built from the latest regular [release](https://github.com/moby/buildkit/releases)
|
||||||
- `moby/buildkit:rootless`: same as `latest` but runs as an unprivileged user, see [`docs/rootless.md`](docs/rootless.md)
|
- `moby/buildkit:rootless`: same as `latest` but runs as an unprivileged user, see [`docs/rootless.md`](docs/rootless.md)
|
||||||
|
|
@ -295,11 +394,17 @@ We provide `buildkitd` container images as [`moby/buildkit`](https://hub.docker.
|
||||||
To run daemon in a container:
|
To run daemon in a container:
|
||||||
|
|
||||||
```bash
|
```bash
|
||||||
docker run -d --privileged -p 1234:1234 moby/buildkit:latest --addr tcp://0.0.0.0:1234
|
docker run -d --name buildkitd --privileged moby/buildkit:latest
|
||||||
export BUILDKIT_HOST=tcp://0.0.0.0:1234
|
export BUILDKIT_HOST=docker-container://buildkitd
|
||||||
buildctl build --help
|
buildctl build --help
|
||||||
```
|
```
|
||||||
|
|
||||||
|
### Kubernetes
|
||||||
|
|
||||||
|
For Kubernetes deployments, see [`examples/kubernetes`](./examples/kubernetes).
|
||||||
|
|
||||||
|
### Daemonless
|
||||||
|
|
||||||
To run client and an ephemeral daemon in a single container ("daemonless mode"):
|
To run client and an ephemeral daemon in a single container ("daemonless mode"):
|
||||||
|
|
||||||
```bash
|
```bash
|
||||||
|
|
@ -335,21 +440,7 @@ docker run \
|
||||||
--local dockerfile=/tmp/work
|
--local dockerfile=/tmp/work
|
||||||
```
|
```
|
||||||
|
|
||||||
The images can be also built locally using `./hack/dockerfiles/test.Dockerfile` (or `./hack/dockerfiles/test.buildkit.Dockerfile` if you already have BuildKit). Run `make images` to build the images as `moby/buildkit:local` and `moby/buildkit:local-rootless`.
|
## Opentracing support
|
||||||
|
|
||||||
#### Connection helpers
|
|
||||||
|
|
||||||
If you are running `moby/buildkit:master` or `moby/buildkit:master-rootless` as a Docker/Kubernetes container, you can use special `BUILDKIT_HOST` URL for connecting to the BuildKit daemon in the container:
|
|
||||||
|
|
||||||
```bash
|
|
||||||
export BUILDKIT_HOST=docker-container://<container>
|
|
||||||
```
|
|
||||||
|
|
||||||
```bash
|
|
||||||
export BUILDKIT_HOST=kube-pod://<pod>
|
|
||||||
```
|
|
||||||
|
|
||||||
### Opentracing support
|
|
||||||
|
|
||||||
BuildKit supports opentracing for buildkitd gRPC API and buildctl commands. To capture the trace to [Jaeger](https://github.com/jaegertracing/jaeger), set `JAEGER_TRACE` environment variable to the collection address.
|
BuildKit supports opentracing for buildkitd gRPC API and buildctl commands. To capture the trace to [Jaeger](https://github.com/jaegertracing/jaeger), set `JAEGER_TRACE` environment variable to the collection address.
|
||||||
|
|
||||||
|
|
@ -360,14 +451,15 @@ export JAEGER_TRACE=0.0.0.0:6831
|
||||||
# any buildctl command should be traced to http://127.0.0.1:16686/
|
# any buildctl command should be traced to http://127.0.0.1:16686/
|
||||||
```
|
```
|
||||||
|
|
||||||
### Supported runc version
|
## Running BuildKit without root privileges
|
||||||
|
|
||||||
During development, BuildKit is tested with the version of runc that is being used by the containerd repository. Please refer to [runc.md](https://github.com/containerd/containerd/blob/v1.2.1/RUNC.md) for more information.
|
|
||||||
|
|
||||||
### Running BuildKit without root privileges
|
|
||||||
|
|
||||||
Please refer to [`docs/rootless.md`](docs/rootless.md).
|
Please refer to [`docs/rootless.md`](docs/rootless.md).
|
||||||
|
|
||||||
### Contributing
|
## Building multi-platform images
|
||||||
|
|
||||||
|
See [`docker buildx` documentation](https://github.com/docker/buildx#building-multi-platform-images)
|
||||||
|
|
||||||
|
## Contributing
|
||||||
|
|
||||||
Want to contribute to BuildKit? Awesome! You can find information about contributing to this project in the [CONTRIBUTING.md](/.github/CONTRIBUTING.md)
|
Want to contribute to BuildKit? Awesome! You can find information about contributing to this project in the [CONTRIBUTING.md](/.github/CONTRIBUTING.md)
|
||||||
|
|
||||||
|
|
|
||||||
199
docs/rootless.md
199
docs/rootless.md
|
|
@ -1,81 +1,77 @@
|
||||||
# Rootless mode (Experimental)
|
# Rootless mode (Experimental)
|
||||||
|
|
||||||
Requirements:
|
Rootless mode allows running BuildKit daemon as a non-root user.
|
||||||
- runc `a00bf0190895aa465a5fbed0268888e2c8ddfe85` (Oct 15, 2018) or later
|
|
||||||
- Some distros such as Debian (excluding Ubuntu) and Arch Linux require `sudo sh -c "echo 1 > /proc/sys/kernel/unprivileged_userns_clone"`.
|
|
||||||
- RHEL/CentOS 7 requires `sudo sh -c "echo 28633 > /proc/sys/user/max_user_namespaces"`. You may also need `sudo grubby --args="namespace.unpriv_enable=1 user_namespace.enable=1" --update-kernel="$(grubby --default-kernel)"`.
|
|
||||||
- `newuidmap` and `newgidmap` need to be installed on the host. These commands are provided by the `uidmap` package. For RHEL/CentOS 7, RPM is not officially provided but available at https://copr.fedorainfracloud.org/coprs/vbatts/shadow-utils-newxidmap/ .
|
|
||||||
- `/etc/subuid` and `/etc/subgid` should contain >= 65536 sub-IDs. e.g. `penguin:231072:65536`.
|
|
||||||
|
|
||||||
|
## Distribution-specific hint
|
||||||
|
Using Ubuntu kernel is recommended.
|
||||||
|
|
||||||
## Set up
|
### Ubuntu
|
||||||
|
* No preparation is needed.
|
||||||
|
* `overlayfs` snapshotter is enabled by default ([Ubuntu-specific kernel patch](https://kernel.ubuntu.com/git/ubuntu/ubuntu-bionic.git/commit/fs/overlayfs?id=3b7da90f28fe1ed4b79ef2d994c81efbc58f1144)).
|
||||||
|
|
||||||
Setting up rootless mode also requires some bothersome steps as follows, but you can also use [`rootlesskit`](https://github.com/rootless-containers/rootlesskit) for automating these steps.
|
### Debian GNU/Linux
|
||||||
|
* Add `kernel.unprivileged_userns_clone=1` to `/etc/sysctl.conf` (or `/etc/sysctl.d`) and run `sudo sysctl -p`
|
||||||
|
* To use `overlayfs` snapshotter (recommended), run `sudo modprobe overlay permit_mounts_in_userns=1` ([Debian-specific kernel patch, introduced in Debian 10](https://salsa.debian.org/kernel-team/linux/blob/283390e7feb21b47779b48e0c8eb0cc409d2c815/debian/patches/debian/overlayfs-permit-mounts-in-userns.patch)). Put the configuration to `/etc/modprobe.d` for persistence.
|
||||||
|
|
||||||
### Terminal 1:
|
### Arch Linux
|
||||||
|
* Add `kernel.unprivileged_userns_clone=1` to `/etc/sysctl.conf` (or `/etc/sysctl.d`) and run `sudo sysctl -p`
|
||||||
|
|
||||||
```
|
### Fedora 31 and later
|
||||||
$ unshare -U -m
|
* Run `sudo grubby --update-kernel=ALL --args="systemd.unified_cgroup_hierarchy=0"` and reboot.
|
||||||
unshared$ echo $$ > /tmp/pid
|
|
||||||
|
### Fedora 30
|
||||||
|
* No preparation is needed
|
||||||
|
|
||||||
|
### RHEL/CentOS 8
|
||||||
|
* No preparation is needed
|
||||||
|
|
||||||
|
### RHEL/CentOS 7
|
||||||
|
* Add `user.max_user_namespaces=28633` to `/etc/sysctl.conf` (or `/etc/sysctl.d`) and run `sudo sysctl -p`
|
||||||
|
* Old releases (<= 7.6) require [extra configuration steps](https://github.com/moby/moby/pull/40076).
|
||||||
|
|
||||||
|
### Container-Optimized OS from Google
|
||||||
|
* :warning: Currently unsupported. See [#879](https://github.com/moby/buildkit/issues/879).
|
||||||
|
|
||||||
|
## Known limitations
|
||||||
|
* No support for `overlayfs` snapshotter, except on Ubuntu and Debian kernels. We are planning to support `fuse-overlayfs` snapshotter instead for other kernels.
|
||||||
|
* Network mode is always set to `network.host`.
|
||||||
|
* No support for `containerd` worker
|
||||||
|
|
||||||
|
## Running BuildKit in Rootless mode
|
||||||
|
|
||||||
|
[RootlessKit](https://github.com/rootless-containers/rootlesskit/) needs to be installed.
|
||||||
|
|
||||||
|
```console
|
||||||
|
$ rootlesskit buildkitd
|
||||||
```
|
```
|
||||||
|
|
||||||
Unsharing mountns (and userns) is required for mounting filesystems without real root privileges.
|
```console
|
||||||
|
$ buildctl --addr unix:///run/user/$UID/buildkit/buildkitd.sock build ...
|
||||||
### Terminal 2:
|
|
||||||
|
|
||||||
```
|
|
||||||
$ id -u
|
|
||||||
1001
|
|
||||||
$ grep $(whoami) /etc/subuid
|
|
||||||
penguin:231072:65536
|
|
||||||
$ grep $(whoami) /etc/subgid
|
|
||||||
penguin:231072:65536
|
|
||||||
$ newuidmap $(cat /tmp/pid) 0 1001 1 1 231072 65536
|
|
||||||
$ newgidmap $(cat /tmp/pid) 0 1001 1 1 231072 65536
|
|
||||||
```
|
```
|
||||||
|
|
||||||
### Terminal 1:
|
## Containerized deployment
|
||||||
|
|
||||||
|
### Kubernetes
|
||||||
|
See [`../examples/kubernetes`](../examples/kubernetes).
|
||||||
|
|
||||||
|
### Docker
|
||||||
|
|
||||||
|
```console
|
||||||
|
$ docker run --name buildkitd -d --security-opt seccomp=unconfined --security-opt apparmor=unconfined moby/buildkit:rootless --oci-worker-no-process-sandbox
|
||||||
|
$ buildctl --addr docker-container://buildkitd build ...
|
||||||
```
|
```
|
||||||
unshared# buildkitd
|
#### About `--oci-worker-no-process-sandbox`
|
||||||
```
|
|
||||||
|
|
||||||
* The data dir will be set to `/home/penguin/.local/share/buildkit`
|
By adding `--oci-worker-no-process-sandbox` to the `buildkitd` arguments, BuildKit can be executed in a container without adding `--privileged` to `docker run` arguments.
|
||||||
* The address will be set to `unix:///run/user/1001/buildkit/buildkitd.sock`
|
However, you still need to pass `--security-opt seccomp=unconfined --security-opt apparmor=unconfined` to `docker run`.
|
||||||
* `overlayfs` snapshotter is not supported except Ubuntu-flavored kernel: http://kernel.ubuntu.com/git/ubuntu/ubuntu-artful.git/commit/fs/overlayfs?h=Ubuntu-4.13.0-25.29&id=0a414bdc3d01f3b61ed86cfe3ce8b63a9240eba7
|
|
||||||
* containerd worker is not supported ( pending PR: https://github.com/containerd/containerd/pull/2006 )
|
|
||||||
* Network namespace is not used at the moment.
|
|
||||||
* Cgroups is disabled.
|
|
||||||
|
|
||||||
### Terminal 2:
|
Note that `--oci-worker-no-process-sandbox` allows build executor containers to `kill` (and potentially `ptrace` depending on the seccomp configuration) an arbitrary process in the BuildKit daemon container.
|
||||||
|
|
||||||
```
|
To allow running rootless `buildkitd` without `--oci-worker-no-process-sandbox`, run `docker run` with `--security-opt systempaths=unconfined`. (For Kubernetes, set `securityContext.procMount` to `Unmasked`.)
|
||||||
$ go get ./examples/build-using-dockerfile
|
|
||||||
$ build-using-dockerfile --buildkit-addr unix:///run/user/1001/buildkit/buildkitd.sock -t foo /path/to/somewhere
|
|
||||||
```
|
|
||||||
|
|
||||||
## Set up (using a container)
|
The `--security-opt systempaths=unconfined` flag disables the masks for the `/proc` mount in the container and potentially allows reading and writing dangerous kernel files, but it is safe when you are running `buildkitd` as non-root.
|
||||||
|
|
||||||
Docker image is available as [`moby/buildkit:rootless`](https://hub.docker.com/r/moby/buildkit/tags/).
|
### Change UID/GID
|
||||||
|
|
||||||
```
|
|
||||||
$ docker run --name buildkitd -d --privileged -p 1234:1234 moby/buildkit:rootless --addr tcp://0.0.0.0:1234
|
|
||||||
```
|
|
||||||
|
|
||||||
```
|
|
||||||
$ go get ./examples/build-using-dockerfile
|
|
||||||
$ build-using-dockerfile --buildkit-addr tcp://127.0.0.1:1234 -t foo /path/to/somewhere
|
|
||||||
```
|
|
||||||
|
|
||||||
### Security consideration
|
|
||||||
|
|
||||||
Although `moby/buildkit:rootless` executes the BuildKit daemon as a normal user, `docker run` still requires `--privileged`.
|
|
||||||
This is to allow build executor containers to mount `/proc`, by providing "unmasked" `/proc` to the BuildKit daemon container.
|
|
||||||
|
|
||||||
See [`docker/cli#1347`](https://github.com/docker/cli/pull/1347) for the ongoing work to remove this requirement.
|
|
||||||
See also [Disabling process sandbox](#disabling-process-sandbox).
|
|
||||||
|
|
||||||
#### UID/GID
|
|
||||||
|
|
||||||
The `moby/buildkit:rootless` image has the following UID/GID configuration:
|
The `moby/buildkit:rootless` image has the following UID/GID configuration:
|
||||||
|
|
||||||
|
|
@ -101,85 +97,8 @@ user:100000:65536
|
||||||
|
|
||||||
To change the UID/GID configuration, you need to modify and build the BuildKit image manually.
|
To change the UID/GID configuration, you need to modify and build the BuildKit image manually.
|
||||||
```
|
```
|
||||||
$ vi hack/dockerfiles/test.Dockerfile
|
$ vi hack/dockerfiles/test.buildkit.Dockerfile
|
||||||
$ docker build -t buildkit-rootless-custom --target rootless -f hack/dockerfiles/test.Dockerfile .
|
$ make images
|
||||||
|
$ docker run ... moby/buildkit:local-rootless ...
|
||||||
```
|
```
|
||||||
|
|
||||||
#### Disabling process sandbox
|
|
||||||
|
|
||||||
By passing `--oci-worker-no-process-sandbox` to the `buildkitd` arguments, BuildKit can be executed in a container without `--privileged`.
|
|
||||||
However, you still need to pass `--security-opt seccomp=unconfined --security-opt apparmor=unconfined` to `docker run`.
|
|
||||||
|
|
||||||
```
|
|
||||||
$ docker run --name buildkitd -d --security-opt seccomp=unconfined --security-opt apparmor=unconfined -p 1234:1234 moby/buildkit:rootless --addr tcp://0.0.0.0:1234 --oci-worker-no-process-sandbox
|
|
||||||
```
|
|
||||||
|
|
||||||
Note that `--oci-worker-no-process-sandbox` allows build executor containers to `kill` (and potentially `ptrace` depending on the seccomp configuration) an arbitrary process in the BuildKit daemon container.
|
|
||||||
|
|
||||||
|
|
||||||
## Set up (using Kubernetes)
|
|
||||||
|
|
||||||
### With `securityContext`
|
|
||||||
|
|
||||||
```yaml
|
|
||||||
apiVersion: apps/v1
|
|
||||||
kind: Deployment
|
|
||||||
metadata:
|
|
||||||
labels:
|
|
||||||
app: buildkitd
|
|
||||||
name: buildkitd
|
|
||||||
spec:
|
|
||||||
selector:
|
|
||||||
matchLabels:
|
|
||||||
app: buildkitd
|
|
||||||
template:
|
|
||||||
metadata:
|
|
||||||
labels:
|
|
||||||
app: buildkitd
|
|
||||||
spec:
|
|
||||||
containers:
|
|
||||||
- image: moby/buildkit:rootless
|
|
||||||
args:
|
|
||||||
- --addr
|
|
||||||
- tcp://0.0.0.0:1234
|
|
||||||
name: buildkitd
|
|
||||||
ports:
|
|
||||||
- containerPort: 1234
|
|
||||||
securityContext:
|
|
||||||
privileged: true
|
|
||||||
```
|
|
||||||
|
|
||||||
This configuration requires privileged containers to be enabled.
|
|
||||||
|
|
||||||
If you are using Kubernetes v1.12+ with either Docker v18.06+, containerd v1.2+, or CRI-O v1.12+ as the CRI runtime, you can replace `privileged: true` with `procMount: Unmasked`.
|
|
||||||
|
|
||||||
### Without `securityContext` but with `--oci-worker-no-process-sandbox`
|
|
||||||
|
|
||||||
```yaml
|
|
||||||
apiVersion: apps/v1
|
|
||||||
kind: Deployment
|
|
||||||
metadata:
|
|
||||||
labels:
|
|
||||||
app: buildkitd
|
|
||||||
name: buildkitd
|
|
||||||
spec:
|
|
||||||
selector:
|
|
||||||
matchLabels:
|
|
||||||
app: buildkitd
|
|
||||||
template:
|
|
||||||
metadata:
|
|
||||||
labels:
|
|
||||||
app: buildkitd
|
|
||||||
spec:
|
|
||||||
containers:
|
|
||||||
- image: moby/buildkit:rootless
|
|
||||||
args:
|
|
||||||
- --addr
|
|
||||||
- tcp://0.0.0.0:1234
|
|
||||||
- --oci-worker-no-process-sandbox
|
|
||||||
name: buildkitd
|
|
||||||
ports:
|
|
||||||
- containerPort: 1234
|
|
||||||
```
|
|
||||||
|
|
||||||
See [Disabling process sandbox](#disabling-process-sandbox) for security notice.
|
|
||||||
|
|
|
||||||
|
|
@ -0,0 +1,39 @@
|
||||||
|
# BuildKit Examples
|
||||||
|
|
||||||
|
## Kubernetes manifests
|
||||||
|
- [`./kubernetes`](./kubernetes): Kubernetes manifests (`Pod`, `Deployment`, `StatefulSet`, `Job`)
|
||||||
|
|
||||||
|
## CLI examples
|
||||||
|
- [`./buildctl-daemonless`](./buildctl-daemonless): buildctl without daemon
|
||||||
|
- [`./build-using-dockerfile`](./build-using-dockerfile): an example BuildKit client with `docker build`-style CLI
|
||||||
|
|
||||||
|
## LLB examples
|
||||||
|
|
||||||
|
For understanding the basics of LLB, `buildkit*` directory contains scripts that define how to build different configurations of BuildKit itself and its dependencies using the `client` package. Running one of these scripts generates a protobuf definition of a build graph. Note that the script itself does not execute any steps of the build.
|
||||||
|
|
||||||
|
You can use `buildctl debug dump-llb` to see what data is in this definition. Add `--dot` to generate dot layout.
|
||||||
|
|
||||||
|
```bash
|
||||||
|
go run examples/buildkit0/buildkit.go \
|
||||||
|
| buildctl debug dump-llb \
|
||||||
|
| jq .
|
||||||
|
```
|
||||||
|
|
||||||
|
To start building use `buildctl build` command. The example script accepts `--with-containerd` flag to choose if containerd binaries and support should be included in the end result as well.
|
||||||
|
|
||||||
|
```bash
|
||||||
|
go run examples/buildkit0/buildkit.go \
|
||||||
|
| buildctl build
|
||||||
|
```
|
||||||
|
|
||||||
|
`buildctl build` will show interactive progress bar by default while the build job is running. If the path to the trace file is specified, the trace file generated will contain all information about the timing of the individual steps and logs.
|
||||||
|
|
||||||
|
Different versions of the example scripts show different ways of describing the build definition for this project to show the capabilities of the library. New versions have been added when new features have become available.
|
||||||
|
|
||||||
|
- `./buildkit0` - uses only exec operations, defines a full stage per component.
|
||||||
|
- `./buildkit1` - cloning git repositories has been separated for extra concurrency.
|
||||||
|
- `./buildkit2` - uses git sources directly instead of running `git clone`, allowing better performance and much safer caching.
|
||||||
|
- `./buildkit3` - allows using local source files for separate components eg. `./buildkit3 --runc=local | buildctl build --local runc-src=some/local/path`
|
||||||
|
- `./dockerfile2llb` - can be used to convert a Dockerfile to LLB for debugging purposes
|
||||||
|
- `./nested-llb` - shows how to use nested invocation to generate LLB
|
||||||
|
- `./gobuild` - shows how to use nested invocation to generate LLB for Go package internal dependencies
|
||||||
|
|
@ -0,0 +1,15 @@
|
||||||
|
# `build-using-dockerfile` example
|
||||||
|
|
||||||
|
:information_source: [BuildKit has been integrated to `docker build` since Docker 18.06.](https://docs.docker.com/develop/develop-images/build_enhancements/)
|
||||||
|
The `build-using-dockerfile` CLI is just provided as an example for writing a BuildKit client application.
|
||||||
|
|
||||||
|
For people familiar with `docker build` command, `build-using-dockerfile` is provided as an example for building Dockerfiles with BuildKit using a syntax similar to `docker build`.
|
||||||
|
|
||||||
|
```bash
|
||||||
|
go get .
|
||||||
|
|
||||||
|
build-using-dockerfile -t myimage /path/to/dir
|
||||||
|
|
||||||
|
# build-using-dockerfile will automatically load the resulting image to Docker
|
||||||
|
docker inspect myimage
|
||||||
|
```
|
||||||
|
|
@ -0,0 +1 @@
|
||||||
|
kubernetes/consistenthash
|
||||||
|
|
@ -0,0 +1,79 @@
|
||||||
|
# Kubernetes manifests for BuildKit
|
||||||
|
|
||||||
|
This directory contains Kubernetes manifests for `Pod`, `Deployment` (with `Service`), `StatefulSet`, and `Job`.
|
||||||
|
* `Pod`: good for quick-start
|
||||||
|
* `Deployment` + `Service`: good for random load balancing with registry-side cache
|
||||||
|
* `StateFulset`: good for client-side load balancing, without registry-side cache
|
||||||
|
* `Job`: good if you don't want to have daemon pods
|
||||||
|
|
||||||
|
Using Rootless mode (`*.rootless.yaml`) is recommended because Rootless mode image is executed as non-root user (UID 1000) and doesn't need `securityContext.privileged`.
|
||||||
|
|
||||||
|
:warning: Rootless mode may not work on some host kernels. See [`../../docs/rootless.md`](../../docs/rootless.md).
|
||||||
|
|
||||||
|
See also ["Building Images Efficiently And Securely On Kubernetes With BuildKit" (KubeCon EU 2019)](https://kccnceu19.sched.com/event/MPX5).
|
||||||
|
|
||||||
|
## `Pod`
|
||||||
|
|
||||||
|
```console
|
||||||
|
$ kubectl apply -f pod.rootless.yaml
|
||||||
|
$ buildctl \
|
||||||
|
--addr kube-pod://buildkitd \
|
||||||
|
build --frontend dockerfile.v0 --local context=/path/to/dir --local dockerfile=/path/to/dir
|
||||||
|
```
|
||||||
|
|
||||||
|
If rootless mode doesn't work, try `pod.privileged.yaml`.
|
||||||
|
|
||||||
|
:warning: `kube-pod://` connection helper requires Kubernetes role that can access `pods/exec` resources. If `pods/exec` is not accessible, use `Service` instead (See below).
|
||||||
|
|
||||||
|
## `Deployment` + `Service`
|
||||||
|
|
||||||
|
Setting up mTLS is highly recommended.
|
||||||
|
|
||||||
|
`./create-certs.sh SAN [SAN...]` can be used for creating certificates.
|
||||||
|
```console
|
||||||
|
$ ./create-certs.sh 127.0.0.1
|
||||||
|
```
|
||||||
|
|
||||||
|
The daemon certificates is created as `Secret` manifest named `buildkit-daemon-certs`.
|
||||||
|
```console
|
||||||
|
$ kubectl apply -f .certs/buildkit-daemon-certs.yaml
|
||||||
|
```
|
||||||
|
|
||||||
|
Apply the `Deployment` and `Service` manifest:
|
||||||
|
```console
|
||||||
|
$ kubectl apply -f deployment+service.rootless.yaml
|
||||||
|
$ kubectl scale --replicas=10 deployment/buildkitd
|
||||||
|
```
|
||||||
|
|
||||||
|
Run `buildctl` with TLS client certificates:
|
||||||
|
```console
|
||||||
|
$ kubectl port-forward service/buildkitd 1234
|
||||||
|
$ buildctl \
|
||||||
|
--addr tcp://127.0.0.1:1234 \
|
||||||
|
--tlscacert .certs/client/ca.pem \
|
||||||
|
--tlscert .certs/client/cert.pem \
|
||||||
|
--tlskey .certs/client/key.pem \
|
||||||
|
build --frontend dockerfile.v0 --local context=/path/to/dir --local dockerfile=/path/to/dir
|
||||||
|
```
|
||||||
|
|
||||||
|
## `StatefulSet`
|
||||||
|
`StatefulSet` is useful for consistent hash mode.
|
||||||
|
|
||||||
|
```console
|
||||||
|
$ kubectl apply -f statefulset.rootless.yaml
|
||||||
|
$ kubectl scale --replicas=10 statefulset/buildkitd
|
||||||
|
$ buildctl \
|
||||||
|
--addr kube-pod://buildkitd-4 \
|
||||||
|
build --frontend dockerfile.v0 --local context=/path/to/dir --local dockerfile=/path/to/dir
|
||||||
|
```
|
||||||
|
|
||||||
|
See `[./consistenthash`](./consistenthash) for how to use consistent hashing.
|
||||||
|
|
||||||
|
## `Job`
|
||||||
|
|
||||||
|
```console
|
||||||
|
$ kubectl apply -f job.rootless.yaml
|
||||||
|
```
|
||||||
|
|
||||||
|
To push the image to the registry, you also need to mount `~/.docker/config.json`
|
||||||
|
and set `$DOCKER_CONFIG` to `/path/to/.docker` directory.
|
||||||
|
|
@ -5,7 +5,7 @@ Demo for efficiently using BuildKit daemon-local cache with multi-node cluster
|
||||||
## Deploy
|
## Deploy
|
||||||
|
|
||||||
```console
|
```console
|
||||||
$ kubectl apply -f buildkitd-rootless-statefulset.yaml
|
$ kubectl apply -f ../statefulset.rootless.yaml
|
||||||
$ kubectl scale --replicas=10 statefulset/buildkitd
|
$ kubectl scale --replicas=10 statefulset/buildkitd
|
||||||
```
|
```
|
||||||
|
|
||||||
|
|
@ -19,7 +19,7 @@ For example, the key can be defined as `<REPO NAME>:<CONTEXT PATH>`, e.g.
|
||||||
|
|
||||||
Then determine the pod that corresponds to the key:
|
Then determine the pod that corresponds to the key:
|
||||||
```console
|
```console
|
||||||
$ go get ./consistenthash
|
$ go build -o consistenthash .
|
||||||
$ pod=$(./show-running-pods.sh | consistenthash $key)
|
$ pod=$(./show-running-pods.sh | consistenthash $key)
|
||||||
```
|
```
|
||||||
|
|
||||||
|
|
@ -0,0 +1,42 @@
|
||||||
|
#!/bin/bash
|
||||||
|
|
||||||
|
set -o errexit
|
||||||
|
set -o nounset
|
||||||
|
set -o pipefail
|
||||||
|
set -o errtrace
|
||||||
|
|
||||||
|
PRODUCT=buildkit
|
||||||
|
DIR=./.certs
|
||||||
|
if [[ "$#" -lt 1 ]]; then
|
||||||
|
echo "Usage: $0 SAN [SAN...]"
|
||||||
|
echo
|
||||||
|
echo "Example: $0 buildkitd.default.svc 127.0.0.1"
|
||||||
|
echo
|
||||||
|
echo "The following iles will be created under ${DIR}"
|
||||||
|
echo "- daemon/{ca.pem,cert.pem,key.pem}"
|
||||||
|
echo "- client/{ca.pem,cert.pem,key.pem}"
|
||||||
|
echo "- ${PRODUCT}-daemon-certs.yaml"
|
||||||
|
echo "- ${PRODUCT}-client-certs.yaml"
|
||||||
|
echo "- SAN"
|
||||||
|
exit 1
|
||||||
|
fi
|
||||||
|
if ! command -v mkcert >/dev/null; then
|
||||||
|
echo "Missing mkcert (https://github.com/FiloSottile/mkcert)"
|
||||||
|
exit 1
|
||||||
|
fi
|
||||||
|
SAN=$@
|
||||||
|
SAN_CLIENT=client
|
||||||
|
|
||||||
|
mkdir -p $DIR ${DIR}/daemon ${DIR}/client
|
||||||
|
(
|
||||||
|
cd $DIR
|
||||||
|
echo $SAN | tr " " "\n" >SAN
|
||||||
|
CAROOT=$(pwd) mkcert -cert-file daemon/cert.pem -key-file daemon/key.pem ${SAN} >/dev/null 2>&1
|
||||||
|
CAROOT=$(pwd) mkcert -client -cert-file client/cert.pem -key-file client/key.pem ${SAN_CLIENT} >/dev/null 2>&1
|
||||||
|
cp -f rootCA.pem daemon/ca.pem
|
||||||
|
cp -f rootCA.pem client/ca.pem
|
||||||
|
rm -f rootCA.pem rootCA-key.pem
|
||||||
|
|
||||||
|
kubectl create secret generic ${PRODUCT}-daemon-certs --dry-run -o yaml --from-file=./daemon >${PRODUCT}-daemon-certs.yaml
|
||||||
|
kubectl create secret generic ${PRODUCT}-client-certs --dry-run -o yaml --from-file=./client >${PRODUCT}-client-certs.yaml
|
||||||
|
)
|
||||||
|
|
@ -0,0 +1,56 @@
|
||||||
|
apiVersion: apps/v1
|
||||||
|
kind: Deployment
|
||||||
|
metadata:
|
||||||
|
labels:
|
||||||
|
app: buildkitd
|
||||||
|
name: buildkitd
|
||||||
|
spec:
|
||||||
|
replicas: 1
|
||||||
|
selector:
|
||||||
|
matchLabels:
|
||||||
|
app: buildkitd
|
||||||
|
template:
|
||||||
|
metadata:
|
||||||
|
labels:
|
||||||
|
app: buildkitd
|
||||||
|
spec:
|
||||||
|
containers:
|
||||||
|
- name: buildkitd
|
||||||
|
image: moby/buildkit:master
|
||||||
|
args:
|
||||||
|
- --addr
|
||||||
|
- unix:///run/buildkit/buildkitd.sock
|
||||||
|
- --addr
|
||||||
|
- tcp://0.0.0.0:1234
|
||||||
|
- --tlscacert
|
||||||
|
- /certs/ca.pem
|
||||||
|
- --tlscert
|
||||||
|
- /certs/cert.pem
|
||||||
|
- --tlskey
|
||||||
|
- /certs/key.pem
|
||||||
|
securityContext:
|
||||||
|
privileged: true
|
||||||
|
ports:
|
||||||
|
- containerPort: 1234
|
||||||
|
volumeMounts:
|
||||||
|
- name: certs
|
||||||
|
readOnly: true
|
||||||
|
mountPath: /certs
|
||||||
|
volumes:
|
||||||
|
# buildkit-daemon-certs must contain ca.pem, cert.pem, and key.pem
|
||||||
|
- name: certs
|
||||||
|
secret:
|
||||||
|
secretName: buildkit-daemon-certs
|
||||||
|
---
|
||||||
|
apiVersion: v1
|
||||||
|
kind: Service
|
||||||
|
metadata:
|
||||||
|
labels:
|
||||||
|
app: buildkitd
|
||||||
|
name: buildkitd
|
||||||
|
spec:
|
||||||
|
ports:
|
||||||
|
- port: 1234
|
||||||
|
protocol: TCP
|
||||||
|
selector:
|
||||||
|
app: buildkitd
|
||||||
|
|
@ -0,0 +1,63 @@
|
||||||
|
apiVersion: apps/v1
|
||||||
|
kind: Deployment
|
||||||
|
metadata:
|
||||||
|
labels:
|
||||||
|
app: buildkitd
|
||||||
|
name: buildkitd
|
||||||
|
spec:
|
||||||
|
replicas: 1
|
||||||
|
selector:
|
||||||
|
matchLabels:
|
||||||
|
app: buildkitd
|
||||||
|
template:
|
||||||
|
metadata:
|
||||||
|
labels:
|
||||||
|
app: buildkitd
|
||||||
|
annotations:
|
||||||
|
container.apparmor.security.beta.kubernetes.io/buildkitd: unconfined
|
||||||
|
container.seccomp.security.alpha.kubernetes.io/buildkitd: unconfined
|
||||||
|
# see buildkit/docs/rootless.md for caveats of rootless mode
|
||||||
|
spec:
|
||||||
|
containers:
|
||||||
|
- name: buildkitd
|
||||||
|
image: moby/buildkit:master-rootless
|
||||||
|
args:
|
||||||
|
- --addr
|
||||||
|
- unix:///run/user/1000/buildkit/buildkitd.sock
|
||||||
|
- --addr
|
||||||
|
- tcp://0.0.0.0:1234
|
||||||
|
- --tlscacert
|
||||||
|
- /certs/ca.pem
|
||||||
|
- --tlscert
|
||||||
|
- /certs/cert.pem
|
||||||
|
- --tlskey
|
||||||
|
- /certs/key.pem
|
||||||
|
- --oci-worker-no-process-sandbox
|
||||||
|
securityContext:
|
||||||
|
# To change UID/GID, you need to rebuild the image
|
||||||
|
runAsUser: 1000
|
||||||
|
runAsGroup: 1000
|
||||||
|
ports:
|
||||||
|
- containerPort: 1234
|
||||||
|
volumeMounts:
|
||||||
|
- name: certs
|
||||||
|
readOnly: true
|
||||||
|
mountPath: /certs
|
||||||
|
volumes:
|
||||||
|
# buildkit-daemon-certs must contain ca.pem, cert.pem, and key.pem
|
||||||
|
- name: certs
|
||||||
|
secret:
|
||||||
|
secretName: buildkit-daemon-certs
|
||||||
|
---
|
||||||
|
apiVersion: v1
|
||||||
|
kind: Service
|
||||||
|
metadata:
|
||||||
|
labels:
|
||||||
|
app: buildkitd
|
||||||
|
name: buildkitd
|
||||||
|
spec:
|
||||||
|
ports:
|
||||||
|
- port: 1234
|
||||||
|
protocol: TCP
|
||||||
|
selector:
|
||||||
|
app: buildkitd
|
||||||
|
|
@ -0,0 +1,44 @@
|
||||||
|
apiVersion: batch/v1
|
||||||
|
kind: Job
|
||||||
|
metadata:
|
||||||
|
name: buildkit
|
||||||
|
spec:
|
||||||
|
template:
|
||||||
|
spec:
|
||||||
|
restartPolicy: Never
|
||||||
|
initContainers:
|
||||||
|
- name: prepare
|
||||||
|
image: alpine:3.10
|
||||||
|
command:
|
||||||
|
- sh
|
||||||
|
- -c
|
||||||
|
- "echo FROM hello-world > /workspace/Dockerfile"
|
||||||
|
volumeMounts:
|
||||||
|
- name: workspace
|
||||||
|
mountPath: /workspace
|
||||||
|
containers:
|
||||||
|
- name: buildkit
|
||||||
|
image: moby/buildkit:master
|
||||||
|
command:
|
||||||
|
- buildctl-daemonless.sh
|
||||||
|
args:
|
||||||
|
- build
|
||||||
|
- --frontend
|
||||||
|
- dockerfile.v0
|
||||||
|
- --local
|
||||||
|
- context=/workspace
|
||||||
|
- --local
|
||||||
|
- dockerfile=/workspace
|
||||||
|
# To push the image to a registry, add
|
||||||
|
# `--output type=image,name=docker.io/username/image,push=true`
|
||||||
|
securityContext:
|
||||||
|
privileged: true
|
||||||
|
volumeMounts:
|
||||||
|
- name: workspace
|
||||||
|
readOnly: true
|
||||||
|
mountPath: /workspace
|
||||||
|
# To push the image, you also need to create `~/.docker/config.json` secret
|
||||||
|
# and set $DOCKER_CONFIG to `/path/to/.docker` directory.
|
||||||
|
volumes:
|
||||||
|
- name: workspace
|
||||||
|
emptyDir: {}
|
||||||
|
|
@ -0,0 +1,57 @@
|
||||||
|
apiVersion: batch/v1
|
||||||
|
kind: Job
|
||||||
|
metadata:
|
||||||
|
name: buildkit
|
||||||
|
spec:
|
||||||
|
template:
|
||||||
|
metadata:
|
||||||
|
annotations:
|
||||||
|
container.apparmor.security.beta.kubernetes.io/buildkit: unconfined
|
||||||
|
container.seccomp.security.alpha.kubernetes.io/buildkit: unconfined
|
||||||
|
# see buildkit/docs/rootless.md for caveats of rootless mode
|
||||||
|
spec:
|
||||||
|
restartPolicy: Never
|
||||||
|
initContainers:
|
||||||
|
- name: prepare
|
||||||
|
image: alpine:3.10
|
||||||
|
command:
|
||||||
|
- sh
|
||||||
|
- -c
|
||||||
|
- "echo FROM hello-world > /workspace/Dockerfile"
|
||||||
|
securityContext:
|
||||||
|
runAsUser: 1000
|
||||||
|
runAsGroup: 1000
|
||||||
|
volumeMounts:
|
||||||
|
- name: workspace
|
||||||
|
mountPath: /workspace
|
||||||
|
containers:
|
||||||
|
- name: buildkit
|
||||||
|
image: moby/buildkit:master-rootless
|
||||||
|
env:
|
||||||
|
- name: BUILDKITD_FLAGS
|
||||||
|
value: --oci-worker-no-process-sandbox
|
||||||
|
command:
|
||||||
|
- buildctl-daemonless.sh
|
||||||
|
args:
|
||||||
|
- build
|
||||||
|
- --frontend
|
||||||
|
- dockerfile.v0
|
||||||
|
- --local
|
||||||
|
- context=/workspace
|
||||||
|
- --local
|
||||||
|
- dockerfile=/workspace
|
||||||
|
# To push the image to a registry, add
|
||||||
|
# `--output type=image,name=docker.io/username/image,push=true`
|
||||||
|
securityContext:
|
||||||
|
# To change UID/GID, you need to rebuild the image
|
||||||
|
runAsUser: 1000
|
||||||
|
runAsGroup: 1000
|
||||||
|
volumeMounts:
|
||||||
|
- name: workspace
|
||||||
|
readOnly: true
|
||||||
|
mountPath: /workspace
|
||||||
|
# To push the image, you also need to create `~/.docker/config.json` secret
|
||||||
|
# and set $DOCKER_CONFIG to `/path/to/.docker` directory.
|
||||||
|
volumes:
|
||||||
|
- name: workspace
|
||||||
|
emptyDir: {}
|
||||||
|
|
@ -0,0 +1,10 @@
|
||||||
|
apiVersion: v1
|
||||||
|
kind: Pod
|
||||||
|
metadata:
|
||||||
|
name: buildkitd
|
||||||
|
spec:
|
||||||
|
containers:
|
||||||
|
- name: buildkitd
|
||||||
|
image: moby/buildkit:master
|
||||||
|
securityContext:
|
||||||
|
privileged: true
|
||||||
|
|
@ -0,0 +1,18 @@
|
||||||
|
apiVersion: v1
|
||||||
|
kind: Pod
|
||||||
|
metadata:
|
||||||
|
name: buildkitd
|
||||||
|
annotations:
|
||||||
|
container.apparmor.security.beta.kubernetes.io/buildkitd: unconfined
|
||||||
|
container.seccomp.security.alpha.kubernetes.io/buildkitd: unconfined
|
||||||
|
# see buildkit/docs/rootless.md for caveats of rootless mode
|
||||||
|
spec:
|
||||||
|
containers:
|
||||||
|
- name: buildkitd
|
||||||
|
image: moby/buildkit:master-rootless
|
||||||
|
args:
|
||||||
|
- --oci-worker-no-process-sandbox
|
||||||
|
securityContext:
|
||||||
|
# To change UID/GID, you need to rebuild the image
|
||||||
|
runAsUser: 1000
|
||||||
|
runAsGroup: 1000
|
||||||
|
|
@ -0,0 +1,22 @@
|
||||||
|
apiVersion: apps/v1
|
||||||
|
kind: StatefulSet
|
||||||
|
metadata:
|
||||||
|
labels:
|
||||||
|
app: buildkitd
|
||||||
|
name: buildkitd
|
||||||
|
spec:
|
||||||
|
serviceName: buildkitd
|
||||||
|
replicas: 1
|
||||||
|
selector:
|
||||||
|
matchLabels:
|
||||||
|
app: buildkitd
|
||||||
|
template:
|
||||||
|
metadata:
|
||||||
|
labels:
|
||||||
|
app: buildkitd
|
||||||
|
spec:
|
||||||
|
containers:
|
||||||
|
- name: buildkitd
|
||||||
|
image: moby/buildkit:master
|
||||||
|
securityContext:
|
||||||
|
privileged: true
|
||||||
|
|
@ -23,23 +23,8 @@ spec:
|
||||||
- name: buildkitd
|
- name: buildkitd
|
||||||
image: moby/buildkit:master-rootless
|
image: moby/buildkit:master-rootless
|
||||||
args:
|
args:
|
||||||
- --addr
|
|
||||||
- unix:///run/user/1000/buildkit/buildkitd.sock
|
|
||||||
- --addr
|
|
||||||
- tcp://0.0.0.0:1234
|
|
||||||
- --oci-worker-no-process-sandbox
|
- --oci-worker-no-process-sandbox
|
||||||
ports:
|
securityContext:
|
||||||
- containerPort: 1234
|
# To change UID/GID, you need to rebuild the image
|
||||||
---
|
runAsUser: 1000
|
||||||
apiVersion: v1
|
runAsGroup: 1000
|
||||||
kind: Service
|
|
||||||
metadata:
|
|
||||||
labels:
|
|
||||||
app: buildkitd
|
|
||||||
name: buildkitd
|
|
||||||
spec:
|
|
||||||
ports:
|
|
||||||
- port: 1234
|
|
||||||
protocol: TCP
|
|
||||||
selector:
|
|
||||||
app: buildkitd
|
|
||||||
Loading…
Reference in New Issue