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buildkit/cache/manager_test.go

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package cache
import (
"archive/tar"
"bytes"
"compress/gzip"
"context"
"encoding/binary"
"fmt"
"io"
"io/ioutil"
"os"
"os/exec"
"path/filepath"
"runtime"
"strconv"
"strings"
"sync"
"testing"
"time"
ctdcompression "github.com/containerd/containerd/archive/compression"
"github.com/containerd/containerd/content"
"github.com/containerd/containerd/content/local"
"github.com/containerd/containerd/diff/apply"
"github.com/containerd/containerd/diff/walking"
"github.com/containerd/containerd/errdefs"
"github.com/containerd/containerd/leases"
ctdmetadata "github.com/containerd/containerd/metadata"
"github.com/containerd/containerd/mount"
"github.com/containerd/containerd/namespaces"
"github.com/containerd/containerd/snapshots"
"github.com/containerd/containerd/snapshots/native"
"github.com/containerd/continuity/fs/fstest"
"github.com/containerd/stargz-snapshotter/estargz"
"github.com/klauspost/compress/zstd"
"github.com/moby/buildkit/cache/config"
"github.com/moby/buildkit/cache/metadata"
"github.com/moby/buildkit/client"
"github.com/moby/buildkit/session"
"github.com/moby/buildkit/snapshot"
containerdsnapshot "github.com/moby/buildkit/snapshot/containerd"
"github.com/moby/buildkit/solver"
"github.com/moby/buildkit/util/compression"
"github.com/moby/buildkit/util/contentutil"
"github.com/moby/buildkit/util/leaseutil"
"github.com/moby/buildkit/util/winlayers"
digest "github.com/opencontainers/go-digest"
ocispecs "github.com/opencontainers/image-spec/specs-go/v1"
"github.com/pkg/errors"
"github.com/stretchr/testify/require"
bolt "go.etcd.io/bbolt"
"golang.org/x/sync/errgroup"
)
type cmOpt struct {
snapshotterName string
snapshotter snapshots.Snapshotter
tmpdir string
}
type cmOut struct {
manager Manager
lm leases.Manager
cs content.Store
}
func newCacheManager(ctx context.Context, opt cmOpt) (co *cmOut, cleanup func() error, err error) {
ns, ok := namespaces.Namespace(ctx)
if !ok {
return nil, nil, errors.Errorf("namespace required for test")
}
if opt.snapshotterName == "" {
opt.snapshotterName = "native"
}
tmpdir, err := ioutil.TempDir("", "cachemanager")
if err != nil {
return nil, nil, err
}
defers := make([]func() error, 0)
cleanup = func() error {
var err error
for i := range defers {
if err1 := defers[len(defers)-1-i](); err1 != nil && err == nil {
err = err1
}
}
return err
}
defer func() {
if err != nil && cleanup != nil {
cleanup()
}
}()
if opt.tmpdir == "" {
defers = append(defers, func() error {
return os.RemoveAll(tmpdir)
})
} else {
os.RemoveAll(tmpdir)
tmpdir = opt.tmpdir
}
if opt.snapshotter == nil {
snapshotter, err := native.NewSnapshotter(filepath.Join(tmpdir, "snapshots"))
if err != nil {
return nil, nil, err
}
opt.snapshotter = snapshotter
}
store, err := local.NewStore(tmpdir)
if err != nil {
return nil, nil, err
}
db, err := bolt.Open(filepath.Join(tmpdir, "containerdmeta.db"), 0644, nil)
if err != nil {
return nil, nil, err
}
defers = append(defers, func() error {
return db.Close()
})
mdb := ctdmetadata.NewDB(db, store, map[string]snapshots.Snapshotter{
opt.snapshotterName: opt.snapshotter,
})
if err := mdb.Init(context.TODO()); err != nil {
return nil, nil, err
}
c := mdb.ContentStore()
store = containerdsnapshot.NewContentStore(c, ns)
lm := leaseutil.WithNamespace(ctdmetadata.NewLeaseManager(mdb), ns)
applier := winlayers.NewFileSystemApplierWithWindows(store, apply.NewFileSystemApplier(store))
differ := winlayers.NewWalkingDiffWithWindows(store, walking.NewWalkingDiff(store))
md, err := metadata.NewStore(filepath.Join(tmpdir, "metadata.db"))
if err != nil {
return nil, nil, err
}
cm, err := NewManager(ManagerOpt{
Snapshotter: snapshot.FromContainerdSnapshotter(opt.snapshotterName, containerdsnapshot.NSSnapshotter(ns, mdb.Snapshotter(opt.snapshotterName)), nil),
MetadataStore: md,
ContentStore: store,
LeaseManager: lm,
GarbageCollect: mdb.GarbageCollect,
Applier: applier,
Differ: differ,
})
if err != nil {
return nil, nil, err
}
return &cmOut{
manager: cm,
lm: lm,
cs: store,
}, cleanup, nil
}
func TestManager(t *testing.T) {
t.Parallel()
ctx := namespaces.WithNamespace(context.Background(), "buildkit-test")
tmpdir, err := ioutil.TempDir("", "cachemanager")
require.NoError(t, err)
defer os.RemoveAll(tmpdir)
snapshotter, err := native.NewSnapshotter(filepath.Join(tmpdir, "snapshots"))
require.NoError(t, err)
co, cleanup, err := newCacheManager(ctx, cmOpt{
snapshotter: snapshotter,
snapshotterName: "native",
})
require.NoError(t, err)
defer cleanup()
cm := co.manager
_, err = cm.Get(ctx, "foobar", nil)
require.Error(t, err)
checkDiskUsage(ctx, t, cm, 0, 0)
active, err := cm.New(ctx, nil, nil, CachePolicyRetain)
require.NoError(t, err)
m, err := active.Mount(ctx, false, nil)
require.NoError(t, err)
lm := snapshot.LocalMounter(m)
target, err := lm.Mount()
require.NoError(t, err)
fi, err := os.Stat(target)
require.NoError(t, err)
require.Equal(t, fi.IsDir(), true)
err = lm.Unmount()
require.NoError(t, err)
_, err = cm.GetMutable(ctx, active.ID())
require.Error(t, err)
require.Equal(t, true, errors.Is(err, ErrLocked))
checkDiskUsage(ctx, t, cm, 1, 0)
snap, err := active.Commit(ctx)
require.NoError(t, err)
checkDiskUsage(ctx, t, cm, 1, 0)
_, err = cm.GetMutable(ctx, active.ID())
require.Error(t, err)
require.Equal(t, true, errors.Is(err, ErrLocked))
err = snap.Release(ctx)
require.NoError(t, err)
checkDiskUsage(ctx, t, cm, 0, 1)
active, err = cm.GetMutable(ctx, active.ID())
require.NoError(t, err)
checkDiskUsage(ctx, t, cm, 1, 0)
snap, err = active.Commit(ctx)
require.NoError(t, err)
checkDiskUsage(ctx, t, cm, 1, 0)
err = snap.Finalize(ctx)
require.NoError(t, err)
err = snap.Release(ctx)
require.NoError(t, err)
_, err = cm.GetMutable(ctx, active.ID())
require.Error(t, err)
require.Equal(t, true, errors.Is(err, errNotFound))
_, err = cm.GetMutable(ctx, snap.ID())
require.Error(t, err)
require.Equal(t, true, errors.Is(err, errInvalid))
snap, err = cm.Get(ctx, snap.ID(), nil)
require.NoError(t, err)
snap2, err := cm.Get(ctx, snap.ID(), nil)
require.NoError(t, err)
checkDiskUsage(ctx, t, cm, 1, 0)
err = snap.Release(ctx)
require.NoError(t, err)
active2, err := cm.New(ctx, snap2, nil, CachePolicyRetain)
require.NoError(t, err)
checkDiskUsage(ctx, t, cm, 2, 0)
snap3, err := active2.Commit(ctx)
require.NoError(t, err)
err = snap2.Release(ctx)
require.NoError(t, err)
checkDiskUsage(ctx, t, cm, 2, 0)
err = snap3.Release(ctx)
require.NoError(t, err)
checkDiskUsage(ctx, t, cm, 0, 2)
buf := pruneResultBuffer()
err = cm.Prune(ctx, buf.C, client.PruneInfo{})
buf.close()
require.NoError(t, err)
checkDiskUsage(ctx, t, cm, 0, 0)
require.Equal(t, len(buf.all), 2)
err = cm.Close()
require.NoError(t, err)
dirs, err := ioutil.ReadDir(filepath.Join(tmpdir, "snapshots/snapshots"))
require.NoError(t, err)
require.Equal(t, 0, len(dirs))
}
func TestLazyGetByBlob(t *testing.T) {
t.Parallel()
ctx := namespaces.WithNamespace(context.Background(), "buildkit-test")
tmpdir, err := ioutil.TempDir("", "cachemanager")
require.NoError(t, err)
defer os.RemoveAll(tmpdir)
snapshotter, err := native.NewSnapshotter(filepath.Join(tmpdir, "snapshots"))
require.NoError(t, err)
co, cleanup, err := newCacheManager(ctx, cmOpt{
snapshotter: snapshotter,
snapshotterName: "native",
})
require.NoError(t, err)
defer cleanup()
cm := co.manager
// Test for #2226 https://github.com/moby/buildkit/issues/2226, create lazy blobs with the same diff ID but
// different digests (due to different compression) and make sure GetByBlob still works
_, desc, err := mapToBlob(map[string]string{"foo": "bar"}, true)
require.NoError(t, err)
descHandlers := DescHandlers(make(map[digest.Digest]*DescHandler))
descHandlers[desc.Digest] = &DescHandler{}
diffID, err := diffIDFromDescriptor(desc)
require.NoError(t, err)
_, err = cm.GetByBlob(ctx, desc, nil, descHandlers)
require.NoError(t, err)
_, desc2, err := mapToBlob(map[string]string{"foo": "bar"}, false)
require.NoError(t, err)
descHandlers2 := DescHandlers(make(map[digest.Digest]*DescHandler))
descHandlers2[desc2.Digest] = &DescHandler{}
diffID2, err := diffIDFromDescriptor(desc2)
require.NoError(t, err)
require.NotEqual(t, desc.Digest, desc2.Digest)
require.Equal(t, diffID, diffID2)
_, err = cm.GetByBlob(ctx, desc2, nil, descHandlers2)
require.NoError(t, err)
}
func TestMergeBlobchainID(t *testing.T) {
t.Parallel()
ctx := namespaces.WithNamespace(context.Background(), "buildkit-test")
tmpdir, err := ioutil.TempDir("", "cachemanager")
require.NoError(t, err)
defer os.RemoveAll(tmpdir)
snapshotter, err := native.NewSnapshotter(filepath.Join(tmpdir, "snapshots"))
require.NoError(t, err)
co, cleanup, err := newCacheManager(ctx, cmOpt{
snapshotter: snapshotter,
snapshotterName: "native",
})
require.NoError(t, err)
defer cleanup()
cm := co.manager
// create a merge ref that has 3 inputs, with each input being a 3 layer blob chain
var mergeInputs []ImmutableRef
var descs []ocispecs.Descriptor
descHandlers := DescHandlers(map[digest.Digest]*DescHandler{})
for i := 0; i < 3; i++ {
contentBuffer := contentutil.NewBuffer()
var curBlob ImmutableRef
for j := 0; j < 3; j++ {
blobBytes, desc, err := mapToBlob(map[string]string{strconv.Itoa(i): strconv.Itoa(j)}, true)
require.NoError(t, err)
cw, err := contentBuffer.Writer(ctx)
require.NoError(t, err)
_, err = cw.Write(blobBytes)
require.NoError(t, err)
err = cw.Commit(ctx, 0, cw.Digest())
require.NoError(t, err)
descHandlers[desc.Digest] = &DescHandler{
Provider: func(_ session.Group) content.Provider { return contentBuffer },
}
curBlob, err = cm.GetByBlob(ctx, desc, curBlob, descHandlers)
require.NoError(t, err)
descs = append(descs, desc)
}
mergeInputs = append(mergeInputs, curBlob.Clone())
}
mergeRef, err := cm.Merge(ctx, mergeInputs, nil)
require.NoError(t, err)
_, err = mergeRef.GetRemotes(ctx, true, config.RefConfig{Compression: compression.New(compression.Default)}, false, nil)
require.NoError(t, err)
// verify the merge blobchain ID isn't just set to one of the inputs (regression test)
mergeBlobchainID := mergeRef.(*immutableRef).getBlobChainID()
for _, mergeInput := range mergeInputs {
inputBlobchainID := mergeInput.(*immutableRef).getBlobChainID()
require.NotEqual(t, mergeBlobchainID, inputBlobchainID)
}
// verify you get the merge ref when asking for an equivalent blob chain
var curBlob ImmutableRef
for _, desc := range descs[:len(descs)-1] {
curBlob, err = cm.GetByBlob(ctx, desc, curBlob, descHandlers)
require.NoError(t, err)
}
blobRef, err := cm.GetByBlob(ctx, descs[len(descs)-1], curBlob, descHandlers)
require.NoError(t, err)
require.Equal(t, mergeRef.ID(), blobRef.ID())
}
func TestSnapshotExtract(t *testing.T) {
if runtime.GOOS == "windows" {
t.Skip("Depends on unimplemented containerd bind-mount support on Windows")
}
t.Parallel()
ctx := namespaces.WithNamespace(context.Background(), "buildkit-test")
tmpdir, err := ioutil.TempDir("", "cachemanager")
require.NoError(t, err)
defer os.RemoveAll(tmpdir)
snapshotter, err := native.NewSnapshotter(filepath.Join(tmpdir, "snapshots"))
require.NoError(t, err)
co, cleanup, err := newCacheManager(ctx, cmOpt{
snapshotter: snapshotter,
snapshotterName: "native",
})
require.NoError(t, err)
defer cleanup()
cm := co.manager
b, desc, err := mapToBlob(map[string]string{"foo": "bar"}, true)
require.NoError(t, err)
err = content.WriteBlob(ctx, co.cs, "ref1", bytes.NewBuffer(b), desc)
require.NoError(t, err)
snap, err := cm.GetByBlob(ctx, desc, nil)
require.NoError(t, err)
require.Equal(t, false, !snap.(*immutableRef).getBlobOnly())
b2, desc2, err := mapToBlob(map[string]string{"foo": "bar123"}, true)
require.NoError(t, err)
err = content.WriteBlob(ctx, co.cs, "ref1", bytes.NewBuffer(b2), desc2)
require.NoError(t, err)
snap2, err := cm.GetByBlob(ctx, desc2, snap)
require.NoError(t, err)
size, err := snap2.(*immutableRef).size(ctx)
require.NoError(t, err)
require.Equal(t, int64(len(b2)), size)
require.Equal(t, false, !snap2.(*immutableRef).getBlobOnly())
dirs, err := ioutil.ReadDir(filepath.Join(tmpdir, "snapshots/snapshots"))
require.NoError(t, err)
require.Equal(t, 0, len(dirs))
checkNumBlobs(ctx, t, co.cs, 2)
err = snap2.Extract(ctx, nil)
require.NoError(t, err)
require.Equal(t, true, !snap.(*immutableRef).getBlobOnly())
require.Equal(t, true, !snap2.(*immutableRef).getBlobOnly())
dirs, err = ioutil.ReadDir(filepath.Join(tmpdir, "snapshots/snapshots"))
require.NoError(t, err)
require.Equal(t, 2, len(dirs))
buf := pruneResultBuffer()
err = cm.Prune(ctx, buf.C, client.PruneInfo{})
buf.close()
require.NoError(t, err)
checkDiskUsage(ctx, t, cm, 2, 0)
require.Equal(t, len(buf.all), 0)
dirs, err = ioutil.ReadDir(filepath.Join(tmpdir, "snapshots/snapshots"))
require.NoError(t, err)
require.Equal(t, 2, len(dirs))
checkNumBlobs(ctx, t, co.cs, 2)
id := snap.ID()
err = snap.Release(context.TODO())
require.NoError(t, err)
buf = pruneResultBuffer()
err = cm.Prune(ctx, buf.C, client.PruneInfo{})
buf.close()
require.NoError(t, err)
checkDiskUsage(ctx, t, cm, 2, 0)
dirs, err = ioutil.ReadDir(filepath.Join(tmpdir, "snapshots/snapshots"))
require.NoError(t, err)
require.Equal(t, 2, len(dirs))
snap, err = cm.Get(ctx, id, nil)
require.NoError(t, err)
checkDiskUsage(ctx, t, cm, 2, 0)
err = snap2.Release(context.TODO())
require.NoError(t, err)
checkDiskUsage(ctx, t, cm, 1, 1)
buf = pruneResultBuffer()
err = cm.Prune(ctx, buf.C, client.PruneInfo{})
buf.close()
require.NoError(t, err)
checkDiskUsage(ctx, t, cm, 1, 0)
require.Equal(t, len(buf.all), 1)
dirs, err = ioutil.ReadDir(filepath.Join(tmpdir, "snapshots/snapshots"))
require.NoError(t, err)
require.Equal(t, 1, len(dirs))
checkNumBlobs(ctx, t, co.cs, 1)
err = snap.Release(context.TODO())
require.NoError(t, err)
buf = pruneResultBuffer()
err = cm.Prune(ctx, buf.C, client.PruneInfo{})
buf.close()
require.NoError(t, err)
checkDiskUsage(ctx, t, cm, 0, 0)
dirs, err = ioutil.ReadDir(filepath.Join(tmpdir, "snapshots/snapshots"))
require.NoError(t, err)
require.Equal(t, 0, len(dirs))
checkNumBlobs(ctx, t, co.cs, 0)
}
func TestExtractOnMutable(t *testing.T) {
if runtime.GOOS == "windows" {
t.Skip("Depends on unimplemented containerd bind-mount support on Windows")
}
t.Parallel()
ctx := namespaces.WithNamespace(context.Background(), "buildkit-test")
tmpdir, err := ioutil.TempDir("", "cachemanager")
require.NoError(t, err)
defer os.RemoveAll(tmpdir)
snapshotter, err := native.NewSnapshotter(filepath.Join(tmpdir, "snapshots"))
require.NoError(t, err)
co, cleanup, err := newCacheManager(ctx, cmOpt{
snapshotter: snapshotter,
snapshotterName: "native",
})
require.NoError(t, err)
defer cleanup()
cm := co.manager
active, err := cm.New(ctx, nil, nil)
require.NoError(t, err)
snap, err := active.Commit(ctx)
require.NoError(t, err)
b, desc, err := mapToBlob(map[string]string{"foo": "bar"}, true)
require.NoError(t, err)
err = content.WriteBlob(ctx, co.cs, "ref1", bytes.NewBuffer(b), desc)
require.NoError(t, err)
b2, desc2, err := mapToBlob(map[string]string{"foo2": "1"}, true)
require.NoError(t, err)
err = content.WriteBlob(ctx, co.cs, "ref2", bytes.NewBuffer(b2), desc2)
require.NoError(t, err)
_, err = cm.GetByBlob(ctx, desc2, snap)
require.Error(t, err)
leaseCtx, done, err := leaseutil.WithLease(ctx, co.lm, leases.WithExpiration(0))
require.NoError(t, err)
err = snap.(*immutableRef).setBlob(leaseCtx, desc)
done(context.TODO())
require.NoError(t, err)
err = snap.(*immutableRef).computeChainMetadata(leaseCtx, map[string]struct{}{snap.ID(): {}})
require.NoError(t, err)
snap2, err := cm.GetByBlob(ctx, desc2, snap)
require.NoError(t, err)
err = snap.Release(context.TODO())
require.NoError(t, err)
require.Equal(t, false, !snap2.(*immutableRef).getBlobOnly())
size, err := snap2.(*immutableRef).size(ctx)
require.NoError(t, err)
require.Equal(t, int64(len(b2)), size)
dirs, err := ioutil.ReadDir(filepath.Join(tmpdir, "snapshots/snapshots"))
require.NoError(t, err)
require.Equal(t, 1, len(dirs))
checkNumBlobs(ctx, t, co.cs, 2)
err = snap2.Extract(ctx, nil)
require.NoError(t, err)
require.Equal(t, true, !snap.(*immutableRef).getBlobOnly())
require.Equal(t, true, !snap2.(*immutableRef).getBlobOnly())
buf := pruneResultBuffer()
err = cm.Prune(ctx, buf.C, client.PruneInfo{})
buf.close()
require.NoError(t, err)
checkDiskUsage(ctx, t, cm, 2, 0)
require.Equal(t, len(buf.all), 0)
dirs, err = ioutil.ReadDir(filepath.Join(tmpdir, "snapshots/snapshots"))
require.NoError(t, err)
require.Equal(t, 2, len(dirs))
err = snap2.Release(context.TODO())
require.NoError(t, err)
checkDiskUsage(ctx, t, cm, 0, 2)
buf = pruneResultBuffer()
err = cm.Prune(ctx, buf.C, client.PruneInfo{})
buf.close()
require.NoError(t, err)
checkDiskUsage(ctx, t, cm, 0, 0)
require.Equal(t, len(buf.all), 2)
dirs, err = ioutil.ReadDir(filepath.Join(tmpdir, "snapshots/snapshots"))
require.NoError(t, err)
require.Equal(t, 0, len(dirs))
checkNumBlobs(ctx, t, co.cs, 0)
}
func TestSetBlob(t *testing.T) {
t.Parallel()
ctx := namespaces.WithNamespace(context.Background(), "buildkit-test")
tmpdir, err := ioutil.TempDir("", "cachemanager")
require.NoError(t, err)
defer os.RemoveAll(tmpdir)
snapshotter, err := native.NewSnapshotter(filepath.Join(tmpdir, "snapshots"))
require.NoError(t, err)
co, cleanup, err := newCacheManager(ctx, cmOpt{
snapshotter: snapshotter,
snapshotterName: "native",
})
require.NoError(t, err)
defer cleanup()
ctx, done, err := leaseutil.WithLease(ctx, co.lm, leaseutil.MakeTemporary)
require.NoError(t, err)
defer done(context.TODO())
cm := co.manager
active, err := cm.New(ctx, nil, nil)
require.NoError(t, err)
snap, err := active.Commit(ctx)
require.NoError(t, err)
snapRef := snap.(*immutableRef)
require.Equal(t, "", string(snapRef.getDiffID()))
require.Equal(t, "", string(snapRef.getBlob()))
require.Equal(t, "", string(snapRef.getChainID()))
require.Equal(t, "", string(snapRef.getBlobChainID()))
require.Equal(t, !snapRef.getBlobOnly(), true)
ctx, clean, err := leaseutil.WithLease(ctx, co.lm)
require.NoError(t, err)
defer clean(context.TODO())
b, desc, err := mapToBlob(map[string]string{"foo": "bar"}, true)
require.NoError(t, err)
err = content.WriteBlob(ctx, co.cs, "ref1", bytes.NewBuffer(b), desc)
require.NoError(t, err)
err = snap.(*immutableRef).setBlob(ctx, ocispecs.Descriptor{
Digest: digest.FromBytes([]byte("foobar")),
Annotations: map[string]string{
"containerd.io/uncompressed": digest.FromBytes([]byte("foobar2")).String(),
},
})
require.Error(t, err)
err = snap.(*immutableRef).setBlob(ctx, desc)
require.NoError(t, err)
err = snap.(*immutableRef).computeChainMetadata(ctx, map[string]struct{}{snap.ID(): {}})
require.NoError(t, err)
snapRef = snap.(*immutableRef)
require.Equal(t, desc.Annotations["containerd.io/uncompressed"], string(snapRef.getDiffID()))
require.Equal(t, desc.Digest, snapRef.getBlob())
require.Equal(t, desc.MediaType, snapRef.getMediaType())
require.Equal(t, snapRef.getDiffID(), snapRef.getChainID())
require.Equal(t, digest.FromBytes([]byte(desc.Digest+" "+snapRef.getDiffID())), snapRef.getBlobChainID())
require.Equal(t, snap.ID(), snapRef.getSnapshotID())
require.Equal(t, !snapRef.getBlobOnly(), true)
active, err = cm.New(ctx, snap, nil)
require.NoError(t, err)
snap2, err := active.Commit(ctx)
require.NoError(t, err)
b2, desc2, err := mapToBlob(map[string]string{"foo2": "bar2"}, true)
require.NoError(t, err)
err = content.WriteBlob(ctx, co.cs, "ref2", bytes.NewBuffer(b2), desc2)
require.NoError(t, err)
err = snap2.(*immutableRef).setBlob(ctx, desc2)
require.NoError(t, err)
err = snap2.(*immutableRef).computeChainMetadata(ctx, map[string]struct{}{snap.ID(): {}, snap2.ID(): {}})
require.NoError(t, err)
snapRef2 := snap2.(*immutableRef)
require.Equal(t, desc2.Annotations["containerd.io/uncompressed"], string(snapRef2.getDiffID()))
require.Equal(t, desc2.Digest, snapRef2.getBlob())
require.Equal(t, desc2.MediaType, snapRef2.getMediaType())
require.Equal(t, digest.FromBytes([]byte(snapRef.getChainID()+" "+snapRef2.getDiffID())), snapRef2.getChainID())
require.Equal(t, digest.FromBytes([]byte(snapRef.getBlobChainID()+" "+digest.FromBytes([]byte(desc2.Digest+" "+snapRef2.getDiffID())))), snapRef2.getBlobChainID())
require.Equal(t, snap2.ID(), snapRef2.getSnapshotID())
require.Equal(t, !snapRef2.getBlobOnly(), true)
b3, desc3, err := mapToBlob(map[string]string{"foo3": "bar3"}, true)
require.NoError(t, err)
err = content.WriteBlob(ctx, co.cs, "ref3", bytes.NewBuffer(b3), desc3)
require.NoError(t, err)
snap3, err := cm.GetByBlob(ctx, desc3, snap)
require.NoError(t, err)
snapRef3 := snap3.(*immutableRef)
require.Equal(t, desc3.Annotations["containerd.io/uncompressed"], string(snapRef3.getDiffID()))
require.Equal(t, desc3.Digest, snapRef3.getBlob())
require.Equal(t, desc3.MediaType, snapRef3.getMediaType())
require.Equal(t, digest.FromBytes([]byte(snapRef.getChainID()+" "+snapRef3.getDiffID())), snapRef3.getChainID())
require.Equal(t, digest.FromBytes([]byte(snapRef.getBlobChainID()+" "+digest.FromBytes([]byte(desc3.Digest+" "+snapRef3.getDiffID())))), snapRef3.getBlobChainID())
require.Equal(t, string(snapRef3.getChainID()), snapRef3.getSnapshotID())
require.Equal(t, !snapRef3.getBlobOnly(), false)
// snap4 is same as snap2
snap4, err := cm.GetByBlob(ctx, desc2, snap)
require.NoError(t, err)
require.Equal(t, snap2.ID(), snap4.ID())
// snap5 is same different blob but same diffID as snap2
b5, desc5, err := mapToBlob(map[string]string{"foo5": "bar5"}, true)
require.NoError(t, err)
desc5.Annotations["containerd.io/uncompressed"] = snapRef2.getDiffID().String()
err = content.WriteBlob(ctx, co.cs, "ref5", bytes.NewBuffer(b5), desc5)
require.NoError(t, err)
snap5, err := cm.GetByBlob(ctx, desc5, snap)
require.NoError(t, err)
snapRef5 := snap5.(*immutableRef)
require.NotEqual(t, snap2.ID(), snap5.ID())
require.Equal(t, snapRef2.getSnapshotID(), snapRef5.getSnapshotID())
require.Equal(t, snapRef2.getDiffID(), snapRef5.getDiffID())
require.Equal(t, desc5.Digest, snapRef5.getBlob())
require.Equal(t, snapRef2.getChainID(), snapRef5.getChainID())
require.NotEqual(t, snapRef2.getBlobChainID(), snapRef5.getBlobChainID())
require.Equal(t, digest.FromBytes([]byte(snapRef.getBlobChainID()+" "+digest.FromBytes([]byte(desc5.Digest+" "+snapRef2.getDiffID())))), snapRef5.getBlobChainID())
// snap6 is a child of snap3
b6, desc6, err := mapToBlob(map[string]string{"foo6": "bar6"}, true)
require.NoError(t, err)
err = content.WriteBlob(ctx, co.cs, "ref6", bytes.NewBuffer(b6), desc6)
require.NoError(t, err)
snap6, err := cm.GetByBlob(ctx, desc6, snap3)
require.NoError(t, err)
snapRef6 := snap6.(*immutableRef)
require.Equal(t, desc6.Annotations["containerd.io/uncompressed"], string(snapRef6.getDiffID()))
require.Equal(t, desc6.Digest, snapRef6.getBlob())
require.Equal(t, digest.FromBytes([]byte(snapRef3.getChainID()+" "+snapRef6.getDiffID())), snapRef6.getChainID())
require.Equal(t, digest.FromBytes([]byte(snapRef3.getBlobChainID()+" "+digest.FromBytes([]byte(snapRef6.getBlob()+" "+snapRef6.getDiffID())))), snapRef6.getBlobChainID())
require.Equal(t, string(snapRef6.getChainID()), snapRef6.getSnapshotID())
require.Equal(t, !snapRef6.getBlobOnly(), false)
_, err = cm.GetByBlob(ctx, ocispecs.Descriptor{
Digest: digest.FromBytes([]byte("notexist")),
Annotations: map[string]string{
"containerd.io/uncompressed": digest.FromBytes([]byte("notexist")).String(),
},
}, snap3)
require.Error(t, err)
clean(context.TODO())
//snap.SetBlob()
}
func TestPrune(t *testing.T) {
t.Parallel()
ctx := namespaces.WithNamespace(context.Background(), "buildkit-test")
tmpdir, err := ioutil.TempDir("", "cachemanager")
require.NoError(t, err)
defer os.RemoveAll(tmpdir)
snapshotter, err := native.NewSnapshotter(filepath.Join(tmpdir, "snapshots"))
require.NoError(t, err)
co, cleanup, err := newCacheManager(ctx, cmOpt{
snapshotter: snapshotter,
snapshotterName: "native",
})
require.NoError(t, err)
defer cleanup()
cm := co.manager
active, err := cm.New(ctx, nil, nil)
require.NoError(t, err)
snap, err := active.Commit(ctx)
require.NoError(t, err)
active, err = cm.New(ctx, snap, nil, CachePolicyRetain)
require.NoError(t, err)
snap2, err := active.Commit(ctx)
require.NoError(t, err)
checkDiskUsage(ctx, t, cm, 2, 0)
dirs, err := ioutil.ReadDir(filepath.Join(tmpdir, "snapshots/snapshots"))
require.NoError(t, err)
require.Equal(t, 2, len(dirs))
// prune with keeping refs does nothing
buf := pruneResultBuffer()
err = cm.Prune(ctx, buf.C, client.PruneInfo{})
buf.close()
require.NoError(t, err)
checkDiskUsage(ctx, t, cm, 2, 0)
require.Equal(t, len(buf.all), 0)
dirs, err = ioutil.ReadDir(filepath.Join(tmpdir, "snapshots/snapshots"))
require.NoError(t, err)
require.Equal(t, 2, len(dirs))
err = snap2.Release(ctx)
require.NoError(t, err)
checkDiskUsage(ctx, t, cm, 1, 1)
// prune with keeping single refs deletes one
buf = pruneResultBuffer()
err = cm.Prune(ctx, buf.C, client.PruneInfo{})
buf.close()
require.NoError(t, err)
checkDiskUsage(ctx, t, cm, 1, 0)
require.Equal(t, len(buf.all), 1)
dirs, err = ioutil.ReadDir(filepath.Join(tmpdir, "snapshots/snapshots"))
require.NoError(t, err)
require.Equal(t, 1, len(dirs))
err = snap.Release(ctx)
require.NoError(t, err)
active, err = cm.New(ctx, snap, nil, CachePolicyRetain)
require.NoError(t, err)
snap2, err = active.Commit(ctx)
require.NoError(t, err)
err = snap.Release(ctx)
require.NoError(t, err)
checkDiskUsage(ctx, t, cm, 2, 0)
// prune with parent released does nothing
buf = pruneResultBuffer()
err = cm.Prune(ctx, buf.C, client.PruneInfo{})
buf.close()
require.NoError(t, err)
checkDiskUsage(ctx, t, cm, 2, 0)
require.Equal(t, len(buf.all), 0)
// releasing last reference
err = snap2.Release(ctx)
require.NoError(t, err)
checkDiskUsage(ctx, t, cm, 0, 2)
buf = pruneResultBuffer()
err = cm.Prune(ctx, buf.C, client.PruneInfo{})
buf.close()
require.NoError(t, err)
checkDiskUsage(ctx, t, cm, 0, 0)
require.Equal(t, len(buf.all), 2)
dirs, err = ioutil.ReadDir(filepath.Join(tmpdir, "snapshots/snapshots"))
require.NoError(t, err)
require.Equal(t, 0, len(dirs))
}
func TestLazyCommit(t *testing.T) {
t.Parallel()
ctx := namespaces.WithNamespace(context.Background(), "buildkit-test")
tmpdir, err := ioutil.TempDir("", "cachemanager")
require.NoError(t, err)
defer os.RemoveAll(tmpdir)
snapshotter, err := native.NewSnapshotter(filepath.Join(tmpdir, "snapshots"))
require.NoError(t, err)
co, cleanup, err := newCacheManager(ctx, cmOpt{
tmpdir: tmpdir,
snapshotter: snapshotter,
snapshotterName: "native",
})
require.NoError(t, err)
cm := co.manager
active, err := cm.New(ctx, nil, nil, CachePolicyRetain)
require.NoError(t, err)
// after commit mutable is locked
snap, err := active.Commit(ctx)
require.NoError(t, err)
_, err = cm.GetMutable(ctx, active.ID())
require.Error(t, err)
require.Equal(t, true, errors.Is(err, ErrLocked))
// immutable refs still work
snap2, err := cm.Get(ctx, snap.ID(), nil)
require.NoError(t, err)
require.Equal(t, snap.ID(), snap2.ID())
err = snap.Release(ctx)
require.NoError(t, err)
err = snap2.Release(ctx)
require.NoError(t, err)
// immutable work after final release as well
snap, err = cm.Get(ctx, snap.ID(), nil)
require.NoError(t, err)
require.Equal(t, snap.ID(), snap2.ID())
// active can't be get while immutable is held
_, err = cm.GetMutable(ctx, active.ID())
require.Error(t, err)
require.Equal(t, true, errors.Is(err, ErrLocked))
err = snap.Release(ctx)
require.NoError(t, err)
// after release mutable becomes available again
active2, err := cm.GetMutable(ctx, active.ID())
require.NoError(t, err)
require.Equal(t, active2.ID(), active.ID())
// because ref was took mutable old immutable are cleared
_, err = cm.Get(ctx, snap.ID(), nil)
require.Error(t, err)
require.Equal(t, true, errors.Is(err, errNotFound))
snap, err = active2.Commit(ctx)
require.NoError(t, err)
// this time finalize commit
err = snap.Finalize(ctx)
require.NoError(t, err)
err = snap.Release(ctx)
require.NoError(t, err)
// mutable is gone after finalize
_, err = cm.GetMutable(ctx, active2.ID())
require.Error(t, err)
require.Equal(t, true, errors.Is(err, errNotFound))
// immutable still works
snap2, err = cm.Get(ctx, snap.ID(), nil)
require.NoError(t, err)
require.Equal(t, snap.ID(), snap2.ID())
err = snap2.Release(ctx)
require.NoError(t, err)
// test restarting after commit
active, err = cm.New(ctx, nil, nil, CachePolicyRetain)
require.NoError(t, err)
// after commit mutable is locked
snap, err = active.Commit(ctx)
require.NoError(t, err)
err = cm.Close()
require.NoError(t, err)
cleanup()
// we can't close snapshotter and open it twice (especially, its internal bbolt store)
co, cleanup, err = newCacheManager(ctx, cmOpt{
tmpdir: tmpdir,
snapshotter: snapshotter,
snapshotterName: "native",
})
require.NoError(t, err)
cm = co.manager
snap2, err = cm.Get(ctx, snap.ID(), nil)
require.NoError(t, err)
err = snap2.Release(ctx)
require.NoError(t, err)
active, err = cm.GetMutable(ctx, active.ID())
require.NoError(t, err)
_, err = cm.Get(ctx, snap.ID(), nil)
require.Error(t, err)
require.Equal(t, true, errors.Is(err, errNotFound))
snap, err = active.Commit(ctx)
require.NoError(t, err)
err = cm.Close()
require.NoError(t, err)
cleanup()
co, cleanup, err = newCacheManager(ctx, cmOpt{
tmpdir: tmpdir,
snapshotter: snapshotter,
snapshotterName: "native",
})
require.NoError(t, err)
defer cleanup()
cm = co.manager
snap2, err = cm.Get(ctx, snap.ID(), nil)
require.NoError(t, err)
err = snap2.Finalize(ctx)
require.NoError(t, err)
err = snap2.Release(ctx)
require.NoError(t, err)
_, err = cm.GetMutable(ctx, active.ID())
require.Error(t, err)
require.Equal(t, true, errors.Is(err, errNotFound))
}
func TestLoopLeaseContent(t *testing.T) {
t.Parallel()
// windows fails when lazy blob is being extracted with "invalid windows mount type: 'bind'"
if runtime.GOOS != "linux" {
t.Skipf("unsupported GOOS: %s", runtime.GOOS)
}
ctx := namespaces.WithNamespace(context.Background(), "buildkit-test")
tmpdir, err := ioutil.TempDir("", "cachemanager")
require.NoError(t, err)
defer os.RemoveAll(tmpdir)
snapshotter, err := native.NewSnapshotter(filepath.Join(tmpdir, "snapshots"))
require.NoError(t, err)
co, cleanup, err := newCacheManager(ctx, cmOpt{
snapshotter: snapshotter,
snapshotterName: "native",
})
require.NoError(t, err)
defer cleanup()
cm := co.manager
ctx, done, err := leaseutil.WithLease(ctx, co.lm, leaseutil.MakeTemporary)
require.NoError(t, err)
defer done(ctx)
// store an uncompressed blob to the content store
compressionLoop := []compression.Type{compression.Uncompressed, compression.Gzip, compression.Zstd, compression.EStargz}
blobBytes, orgDesc, err := mapToBlob(map[string]string{"foo": "1"}, false)
require.NoError(t, err)
contentBuffer := contentutil.NewBuffer()
descHandlers := DescHandlers(map[digest.Digest]*DescHandler{})
cw, err := contentBuffer.Writer(ctx, content.WithRef(fmt.Sprintf("write-test-blob-%s", orgDesc.Digest)))
require.NoError(t, err)
_, err = cw.Write(blobBytes)
require.NoError(t, err)
require.NoError(t, cw.Commit(ctx, 0, cw.Digest()))
descHandlers[orgDesc.Digest] = &DescHandler{
Provider: func(_ session.Group) content.Provider { return contentBuffer },
}
// Create a compression loop
ref, err := cm.GetByBlob(ctx, orgDesc, nil, descHandlers)
require.NoError(t, err)
allRefs := []ImmutableRef{ref}
defer func() {
for _, ref := range allRefs {
ref.Release(ctx)
}
}()
var chain []ocispecs.Descriptor
for _, compressionType := range compressionLoop {
remotes, err := ref.GetRemotes(ctx, true, config.RefConfig{Compression: compression.New(compressionType).SetForce(true)}, false, nil)
require.NoError(t, err)
require.Equal(t, 1, len(remotes))
require.Equal(t, 1, len(remotes[0].Descriptors))
desc := remotes[0].Descriptors[0]
chain = append(chain, desc)
ref, err = cm.GetByBlob(ctx, desc, nil, descHandlers)
require.NoError(t, err)
allRefs = append(allRefs, ref)
}
require.Equal(t, len(compressionLoop), len(chain))
require.NoError(t, ref.(*immutableRef).linkBlob(ctx, chain[0])) // This creates a loop
// Make sure a loop is created
visited := make(map[digest.Digest]struct{})
gotChain := []digest.Digest{orgDesc.Digest}
cur := orgDesc
previous := chain[len(chain)-1].Digest
for i := 0; i < 1000; i++ {
dgst := cur.Digest
visited[dgst] = struct{}{}
info, err := co.cs.Info(ctx, dgst)
if err != nil && !errors.Is(err, errdefs.ErrNotFound) {
require.NoError(t, err)
}
var children []ocispecs.Descriptor
for k, dgstS := range info.Labels {
if !strings.HasPrefix(k, blobVariantGCLabel) {
continue
}
cDgst, err := digest.Parse(dgstS)
if err != nil || cDgst == dgst || previous == cDgst {
continue
}
cDesc, err := getBlobDesc(ctx, co.cs, cDgst)
require.NoError(t, err)
children = append(children, cDesc)
}
require.Equal(t, 1, len(children), "previous=%v, cur=%v, labels: %+v", previous, cur, info.Labels)
previous = cur.Digest
cur = children[0]
if _, ok := visited[cur.Digest]; ok {
break
}
gotChain = append(gotChain, cur.Digest)
}
require.Equal(t, len(chain), len(gotChain))
// Prune all refs
require.NoError(t, done(ctx))
for _, ref := range allRefs {
ref.Release(ctx)
}
ensurePrune(ctx, t, cm, len(gotChain)-1, 10)
// Check if contents are cleaned up
for _, d := range gotChain {
_, err := co.cs.Info(ctx, d)
require.ErrorIs(t, err, errdefs.ErrNotFound)
}
}
func TestSharingCompressionVariant(t *testing.T) {
t.Parallel()
// windows fails when lazy blob is being extracted with "invalid windows mount type: 'bind'"
if runtime.GOOS != "linux" {
t.Skipf("unsupported GOOS: %s", runtime.GOOS)
}
ctx := namespaces.WithNamespace(context.Background(), "buildkit-test")
tmpdir, err := ioutil.TempDir("", "cachemanager")
require.NoError(t, err)
defer os.RemoveAll(tmpdir)
snapshotter, err := native.NewSnapshotter(filepath.Join(tmpdir, "snapshots"))
require.NoError(t, err)
co, cleanup, err := newCacheManager(ctx, cmOpt{
snapshotter: snapshotter,
snapshotterName: "native",
})
require.NoError(t, err)
defer cleanup()
ctx, done, err := leaseutil.WithLease(ctx, co.lm, leaseutil.MakeTemporary)
require.NoError(t, err)
defer done(context.TODO())
allCompressions := []compression.Type{compression.Uncompressed, compression.Gzip, compression.Zstd, compression.EStargz}
do := func(test func(testCaseSharingCompressionVariant)) {
for _, a := range exclude(allCompressions, compression.Uncompressed) {
for _, aV1 := range exclude(allCompressions, a) {
for _, aV2 := range exclude(allCompressions, a, aV1) {
for _, b := range []compression.Type{aV1, aV2} {
for _, bV1 := range exclude(allCompressions, a, aV1, aV2) {
test(testCaseSharingCompressionVariant{
a: a,
aVariants: []compression.Type{aV1, aV2},
b: b,
bVariants: []compression.Type{bV1, a},
})
}
}
}
}
}
}
t.Logf("Test cases with possible compression types")
do(func(testCase testCaseSharingCompressionVariant) {
testCase.checkPrune = true
testSharingCompressionVariant(ctx, t, co, testCase)
require.NoError(t, co.manager.Prune(ctx, nil, client.PruneInfo{All: true}))
checkDiskUsage(ctx, t, co.manager, 0, 0)
})
t.Logf("Test case with many parallel operation")
eg, egctx := errgroup.WithContext(ctx)
do(func(testCase testCaseSharingCompressionVariant) {
eg.Go(func() error {
testCase.checkPrune = false
testSharingCompressionVariant(egctx, t, co, testCase)
return nil
})
})
require.NoError(t, eg.Wait())
}
func exclude(s []compression.Type, ts ...compression.Type) (res []compression.Type) {
EachElem:
for _, v := range s {
for _, t := range ts {
if v == t {
continue EachElem
}
}
res = append(res, v)
}
return
}
// testCaseSharingCompressionVariant is one test case configuration for testSharingCompressionVariant.
// This configures two refs A and B.
// A creates compression variants configured by aVariants and
// B creates compression variants configured by bVariants.
// This test checks if aVariants are visible from B and bVariants are visible from A.
type testCaseSharingCompressionVariant struct {
// a is the compression of the initial immutableRef's (called A) blob
a compression.Type
// aVariants are the compression variants created from A
aVariants []compression.Type
// b is another immutableRef (called B) which has one of the compression variants of A
b compression.Type
// bVariants are compression variants created from B
bVariants []compression.Type
// checkPrune is whether checking prune API. must be false if run tests in parallel.
checkPrune bool
}
func testSharingCompressionVariant(ctx context.Context, t *testing.T, co *cmOut, testCase testCaseSharingCompressionVariant) {
var (
cm = co.manager
allCompressions = append(append([]compression.Type{testCase.a, testCase.b}, testCase.aVariants...), testCase.bVariants...)
orgContent = map[string]string{"foo": "1"}
)
test := func(customized bool) {
defer cm.Prune(ctx, nil, client.PruneInfo{})
// Prepare the original content
_, orgContentDesc, err := mapToBlob(orgContent, false)
require.NoError(t, err)
blobBytes, aDesc, err := mapToBlobWithCompression(orgContent, func(w io.Writer) (io.WriteCloser, string, error) {
cw, err := getCompressor(w, testCase.a, customized)
if err != nil {
return nil, "", err
}
return cw, testCase.a.DefaultMediaType(), nil
})
require.NoError(t, err)
contentBuffer := contentutil.NewBuffer()
descHandlers := DescHandlers(map[digest.Digest]*DescHandler{})
cw, err := contentBuffer.Writer(ctx, content.WithRef(fmt.Sprintf("write-test-blob-%s", aDesc.Digest)))
require.NoError(t, err)
_, err = cw.Write(blobBytes)
require.NoError(t, err)
require.NoError(t, cw.Commit(ctx, 0, cw.Digest()))
descHandlers[aDesc.Digest] = &DescHandler{
Provider: func(_ session.Group) content.Provider { return contentBuffer },
}
// Create compression variants
aRef, err := cm.GetByBlob(ctx, aDesc, nil, descHandlers)
require.NoError(t, err)
defer aRef.Release(ctx)
var bDesc ocispecs.Descriptor
for _, compressionType := range testCase.aVariants {
remotes, err := aRef.GetRemotes(ctx, true, config.RefConfig{Compression: compression.New(compressionType).SetForce(true)}, false, nil)
require.NoError(t, err)
require.Equal(t, 1, len(remotes))
require.Equal(t, 1, len(remotes[0].Descriptors))
if compressionType == testCase.b {
bDesc = remotes[0].Descriptors[0]
}
}
require.NotEqual(t, "", bDesc.Digest, "compression B must be chosen from the variants of A")
bRef, err := cm.GetByBlob(ctx, bDesc, nil, descHandlers)
require.NoError(t, err)
defer bRef.Release(ctx)
for _, compressionType := range testCase.bVariants {
remotes, err := bRef.GetRemotes(ctx, true, config.RefConfig{Compression: compression.New(compressionType).SetForce(true)}, false, nil)
require.NoError(t, err)
require.Equal(t, 1, len(remotes))
require.Equal(t, 1, len(remotes[0].Descriptors))
}
// check if all compression variables are available on the both refs
checkCompression := func(desc ocispecs.Descriptor, compressionType compression.Type) {
require.Equal(t, compressionType.DefaultMediaType(), desc.MediaType, "compression: %v", compressionType)
if compressionType == compression.EStargz {
ok, err := isEStargz(ctx, co.cs, desc.Digest)
require.NoError(t, err, "compression: %v", compressionType)
require.True(t, ok, "compression: %v", compressionType)
}
}
for _, c := range allCompressions {
aDesc, err := aRef.(*immutableRef).getBlobWithCompression(ctx, c)
require.NoError(t, err, "compression: %v", c)
bDesc, err := bRef.(*immutableRef).getBlobWithCompression(ctx, c)
require.NoError(t, err, "compression: %v", c)
checkCompression(aDesc, c)
checkCompression(bDesc, c)
}
// check if compression variables are availalbe on B still after A is released
if testCase.checkPrune && aRef.ID() != bRef.ID() {
require.NoError(t, aRef.Release(ctx))
ensurePrune(ctx, t, cm, 1, 10)
checkDiskUsage(ctx, t, co.manager, 1, 0)
for _, c := range allCompressions {
_, err = bRef.(*immutableRef).getBlobWithCompression(ctx, c)
require.NoError(t, err)
}
}
// check if contents are valid
for _, c := range allCompressions {
bDesc, err := bRef.(*immutableRef).getBlobWithCompression(ctx, c)
require.NoError(t, err, "compression: %v", c)
uDgst := bDesc.Digest
if c != compression.Uncompressed {
convertFunc, err := getConverter(ctx, co.cs, bDesc, compression.New(compression.Uncompressed))
require.NoError(t, err, "compression: %v", c)
uDesc, err := convertFunc(ctx, co.cs, bDesc)
require.NoError(t, err, "compression: %v", c)
uDgst = uDesc.Digest
}
require.Equal(t, uDgst, orgContentDesc.Digest, "compression: %v", c)
}
}
for _, customized := range []bool{true, false} {
// tests in two patterns: whether making the initial blob customized
test(customized)
}
}
func ensurePrune(ctx context.Context, t *testing.T, cm Manager, pruneNum, maxRetry int) {
sum := 0
for i := 0; i <= maxRetry; i++ {
buf := pruneResultBuffer()
require.NoError(t, cm.Prune(ctx, buf.C, client.PruneInfo{All: true}))
buf.close()
sum += len(buf.all)
if sum >= pruneNum {
return
}
time.Sleep(100 * time.Millisecond)
t.Logf("Retrying to prune (%v)", i)
}
require.Equal(t, true, sum >= pruneNum, "actual=%v, expected=%v", sum, pruneNum)
}
func getCompressor(w io.Writer, compressionType compression.Type, customized bool) (io.WriteCloser, error) {
switch compressionType {
case compression.Uncompressed:
return nil, fmt.Errorf("compression is not requested: %v", compressionType)
case compression.Gzip:
if customized {
gz, _ := gzip.NewWriterLevel(w, gzip.NoCompression)
gz.Header.Comment = "hello"
gz.Close()
}
return gzip.NewWriter(w), nil
case compression.EStargz:
done := make(chan struct{})
pr, pw := io.Pipe()
level := gzip.BestCompression
if customized {
level = gzip.BestSpeed
}
go func() {
defer close(done)
gw := estargz.NewWriterLevel(w, level)
if err := gw.AppendTarLossLess(pr); err != nil {
pr.CloseWithError(err)
return
}
if _, err := gw.Close(); err != nil {
pr.CloseWithError(err)
return
}
pr.Close()
}()
return &writeCloser{pw, func() error { <-done; return nil }}, nil
case compression.Zstd:
if customized {
skippableFrameMagic := []byte{0x50, 0x2a, 0x4d, 0x18}
s := []byte("hello")
size := make([]byte, 4)
binary.LittleEndian.PutUint32(size, uint32(len(s)))
if _, err := w.Write(append(append(skippableFrameMagic, size...), s...)); err != nil {
return nil, err
}
}
return zstd.NewWriter(w)
default:
return nil, fmt.Errorf("unknown compression type: %q", compressionType)
}
}
func TestConversion(t *testing.T) {
t.Parallel()
if runtime.GOOS != "linux" {
t.Skipf("unsupported GOOS: %s", runtime.GOOS)
}
ctx := namespaces.WithNamespace(context.Background(), "buildkit-test")
tmpdir, err := ioutil.TempDir("", "cachemanager")
require.NoError(t, err)
defer os.RemoveAll(tmpdir)
snapshotter, err := native.NewSnapshotter(filepath.Join(tmpdir, "snapshots"))
require.NoError(t, err)
co, cleanup, err := newCacheManager(ctx, cmOpt{
snapshotter: snapshotter,
snapshotterName: "native",
})
require.NoError(t, err)
defer cleanup()
store := co.cs
// Preapre the original tar blob using archive/tar and tar command on the system
m := map[string]string{"foo1": "bar1", "foo2": "bar2"}
orgBlobBytesGo, orgDescGo, err := mapToBlob(m, false)
require.NoError(t, err)
cw, err := store.Writer(ctx, content.WithRef(fmt.Sprintf("write-test-blob-%s", orgDescGo.Digest)))
require.NoError(t, err)
_, err = cw.Write(orgBlobBytesGo)
require.NoError(t, err)
err = cw.Commit(ctx, 0, cw.Digest())
require.NoError(t, err)
orgBlobBytesSys, orgDescSys, err := mapToSystemTarBlob(m)
require.NoError(t, err)
cw, err = store.Writer(ctx, content.WithRef(fmt.Sprintf("write-test-blob-%s", orgDescSys.Digest)))
require.NoError(t, err)
_, err = cw.Write(orgBlobBytesSys)
require.NoError(t, err)
err = cw.Commit(ctx, 0, cw.Digest())
require.NoError(t, err)
// Tests all combination of the conversions from type i to type j preserve
// the uncompressed digest.
allCompression := []compression.Type{compression.Uncompressed, compression.Gzip, compression.EStargz, compression.Zstd}
eg, egctx := errgroup.WithContext(ctx)
for _, orgDesc := range []ocispecs.Descriptor{orgDescGo, orgDescSys} {
for _, i := range allCompression {
compSrc := compression.New(i)
for _, j := range allCompression {
i, j, orgDesc := i, j, orgDesc
compDest := compression.New(j)
eg.Go(func() error {
testName := fmt.Sprintf("%s=>%s", i, j)
// Prepare the source compression type
convertFunc, err := getConverter(egctx, store, orgDesc, compSrc)
require.NoError(t, err, testName)
srcDesc := &orgDesc
if convertFunc != nil {
srcDesc, err = convertFunc(egctx, store, orgDesc)
require.NoError(t, err, testName)
}
// Convert the blob
convertFunc, err = getConverter(egctx, store, *srcDesc, compDest)
require.NoError(t, err, testName)
resDesc := srcDesc
if convertFunc != nil {
resDesc, err = convertFunc(egctx, store, *srcDesc)
require.NoError(t, err, testName)
}
// Check the uncompressed digest is the same as the original
convertFunc, err = getConverter(egctx, store, *resDesc, compression.New(compression.Uncompressed))
require.NoError(t, err, testName)
recreatedDesc := resDesc
if convertFunc != nil {
recreatedDesc, err = convertFunc(egctx, store, *resDesc)
require.NoError(t, err, testName)
}
require.Equal(t, recreatedDesc.Digest, orgDesc.Digest, testName)
require.NotNil(t, recreatedDesc.Annotations)
require.Equal(t, recreatedDesc.Annotations["containerd.io/uncompressed"], orgDesc.Digest.String(), testName)
return nil
})
}
}
}
require.NoError(t, eg.Wait())
}
type idxToVariants []map[compression.Type]ocispecs.Descriptor
func TestGetRemotes(t *testing.T) {
t.Parallel()
// windows fails when lazy blob is being extracted with "invalid windows mount type: 'bind'"
if runtime.GOOS != "linux" {
t.Skipf("unsupported GOOS: %s", runtime.GOOS)
}
ctx := namespaces.WithNamespace(context.Background(), "buildkit-test")
tmpdir, err := ioutil.TempDir("", "cachemanager")
require.NoError(t, err)
defer os.RemoveAll(tmpdir)
snapshotter, err := native.NewSnapshotter(filepath.Join(tmpdir, "snapshots"))
require.NoError(t, err)
co, cleanup, err := newCacheManager(ctx, cmOpt{
snapshotter: snapshotter,
snapshotterName: "native",
})
require.NoError(t, err)
defer cleanup()
cm := co.manager
ctx, done, err := leaseutil.WithLease(ctx, co.lm, leaseutil.MakeTemporary)
require.NoError(t, err)
defer done(context.TODO())
contentBuffer := contentutil.NewBuffer()
descHandlers := DescHandlers(map[digest.Digest]*DescHandler{})
// make some lazy refs from blobs
expectedContent := map[digest.Digest]struct{}{}
var descs []ocispecs.Descriptor
for i := 0; i < 2; i++ {
blobmap := map[string]string{"foo": strconv.Itoa(i)}
blobBytes, desc, err := mapToBlob(blobmap, true)
require.NoError(t, err)
expectedContent[desc.Digest] = struct{}{}
descs = append(descs, desc)
cw, err := contentBuffer.Writer(ctx)
require.NoError(t, err)
_, err = cw.Write(blobBytes)
require.NoError(t, err)
err = cw.Commit(ctx, 0, cw.Digest())
require.NoError(t, err)
descHandlers[desc.Digest] = &DescHandler{
Provider: func(_ session.Group) content.Provider { return contentBuffer },
}
uncompressedBlobBytes, uncompressedDesc, err := mapToBlob(blobmap, false)
require.NoError(t, err)
expectedContent[uncompressedDesc.Digest] = struct{}{}
esgzDgst, err := esgzBlobDigest(uncompressedBlobBytes)
require.NoError(t, err)
expectedContent[esgzDgst] = struct{}{}
zstdDigest, err := zstdBlobDigest(uncompressedBlobBytes)
require.NoError(t, err)
expectedContent[zstdDigest] = struct{}{}
}
// Create 3 levels of mutable refs, where each parent ref has 2 children (this tests parallel creation of
// overlapping blob chains).
lazyRef, err := cm.GetByBlob(ctx, descs[0], nil, descHandlers)
require.NoError(t, err)
refs := []ImmutableRef{lazyRef}
for i := 0; i < 3; i++ {
var newRefs []ImmutableRef
for j, ir := range refs {
for k := 0; k < 2; k++ {
mutRef, err := cm.New(ctx, ir, nil, descHandlers)
require.NoError(t, err)
m, err := mutRef.Mount(ctx, false, nil)
require.NoError(t, err)
lm := snapshot.LocalMounter(m)
target, err := lm.Mount()
require.NoError(t, err)
f, err := os.Create(filepath.Join(target, fmt.Sprintf("%d-%d-%d", i, j, k)))
require.NoError(t, err)
err = os.Chtimes(f.Name(), time.Unix(0, 0), time.Unix(0, 0))
require.NoError(t, err)
_, desc, err := fileToBlob(f, true)
require.NoError(t, err)
expectedContent[desc.Digest] = struct{}{}
uncompressedBlobBytes, uncompressedDesc, err := fileToBlob(f, false)
require.NoError(t, err)
expectedContent[uncompressedDesc.Digest] = struct{}{}
esgzDgst, err := esgzBlobDigest(uncompressedBlobBytes)
require.NoError(t, err)
expectedContent[esgzDgst] = struct{}{}
zstdDigest, err := zstdBlobDigest(uncompressedBlobBytes)
require.NoError(t, err)
expectedContent[zstdDigest] = struct{}{}
f.Close()
err = lm.Unmount()
require.NoError(t, err)
immutRef, err := mutRef.Commit(ctx)
require.NoError(t, err)
newRefs = append(newRefs, immutRef)
}
}
refs = newRefs
}
// also test the original lazyRef to get coverage for refs that don't have to be extracted from the snapshotter
lazyRef2, err := cm.GetByBlob(ctx, descs[1], nil, descHandlers)
require.NoError(t, err)
refs = append(refs, lazyRef2)
checkNumBlobs(ctx, t, co.cs, 1)
variantsMap := make(map[string]idxToVariants)
var variantsMapMu sync.Mutex
// Call GetRemotes on all the refs
eg, egctx := errgroup.WithContext(ctx)
for _, ir := range refs {
ir := ir.(*immutableRef)
for _, compressionType := range []compression.Type{compression.Uncompressed, compression.Gzip, compression.EStargz, compression.Zstd} {
compressionType := compressionType
refCfg := config.RefConfig{Compression: compression.New(compressionType).SetForce(true)}
eg.Go(func() error {
remotes, err := ir.GetRemotes(egctx, true, refCfg, false, nil)
require.NoError(t, err)
require.Equal(t, 1, len(remotes))
remote := remotes[0]
refChain := ir.layerChain()
for i, desc := range remote.Descriptors {
switch compressionType {
case compression.Uncompressed:
require.Equal(t, ocispecs.MediaTypeImageLayer, desc.MediaType)
case compression.Gzip:
require.Equal(t, ocispecs.MediaTypeImageLayerGzip, desc.MediaType)
case compression.EStargz:
require.Equal(t, ocispecs.MediaTypeImageLayerGzip, desc.MediaType)
case compression.Zstd:
require.Equal(t, ocispecs.MediaTypeImageLayer+"+zstd", desc.MediaType)
default:
require.Fail(t, "unhandled media type", compressionType)
}
dgst := desc.Digest
require.Contains(t, expectedContent, dgst, "for %v", compressionType)
checkDescriptor(ctx, t, co.cs, desc, compressionType)
variantsMapMu.Lock()
if len(variantsMap[ir.ID()]) == 0 {
variantsMap[ir.ID()] = make(idxToVariants, len(remote.Descriptors))
}
variantsMapMu.Unlock()
require.Equal(t, len(remote.Descriptors), len(variantsMap[ir.ID()]))
variantsMapMu.Lock()
if variantsMap[ir.ID()][i] == nil {
variantsMap[ir.ID()][i] = make(map[compression.Type]ocispecs.Descriptor)
}
variantsMap[ir.ID()][i][compressionType] = desc
variantsMapMu.Unlock()
r := refChain[i]
isLazy, err := r.isLazy(egctx)
require.NoError(t, err)
needs, err := needsConversion(ctx, co.cs, desc, compressionType)
require.NoError(t, err)
if needs {
require.False(t, isLazy, "layer %q requires conversion so it must be unlazied", desc.Digest)
}
bDesc, err := r.getBlobWithCompression(egctx, compressionType)
if isLazy {
require.Error(t, err)
} else {
require.NoError(t, err)
checkDescriptor(ctx, t, co.cs, bDesc, compressionType)
require.Equal(t, desc.Digest, bDesc.Digest)
}
}
return nil
})
}
}
require.NoError(t, eg.Wait())
// verify there's a 1-to-1 mapping between the content store and what we expected to be there
err = co.cs.Walk(ctx, func(info content.Info) error {
dgst := info.Digest
var matched bool
for expected := range expectedContent {
if dgst == expected {
delete(expectedContent, expected)
matched = true
break
}
}
require.True(t, matched, "unexpected blob: %s", info.Digest)
checkInfo(ctx, t, co.cs, info)
return nil
})
require.NoError(t, err)
require.Equal(t, map[digest.Digest]struct{}{}, expectedContent)
// Check if "all" option returns all available blobs
for _, ir := range refs {
ir := ir.(*immutableRef)
variantsMapMu.Lock()
variants, ok := variantsMap[ir.ID()]
variantsMapMu.Unlock()
require.True(t, ok, ir.ID())
for _, compressionType := range []compression.Type{compression.Uncompressed, compression.Gzip, compression.EStargz, compression.Zstd} {
compressionType := compressionType
refCfg := config.RefConfig{Compression: compression.New(compressionType)}
eg.Go(func() error {
remotes, err := ir.GetRemotes(egctx, false, refCfg, true, nil)
require.NoError(t, err)
require.True(t, len(remotes) > 0, "for %s : %d", compressionType, len(remotes))
gotMain, gotVariants := remotes[0], remotes[1:]
// Check the main blob is compatible with all == false
mainOnly, err := ir.GetRemotes(egctx, false, refCfg, false, nil)
require.NoError(t, err)
require.Equal(t, 1, len(mainOnly))
mainRemote := mainOnly[0]
require.Equal(t, len(mainRemote.Descriptors), len(gotMain.Descriptors))
for i := 0; i < len(mainRemote.Descriptors); i++ {
require.Equal(t, mainRemote.Descriptors[i].Digest, gotMain.Descriptors[i].Digest)
}
// Check all variants are covered
checkVariantsCoverage(egctx, t, variants, len(remotes[0].Descriptors)-1, gotVariants, &compressionType)
return nil
})
}
}
require.NoError(t, eg.Wait())
}
func checkVariantsCoverage(ctx context.Context, t *testing.T, variants idxToVariants, idx int, remotes []*solver.Remote, expectCompression *compression.Type) {
if idx < 0 {
for _, r := range remotes {
require.Equal(t, len(r.Descriptors), 0)
}
return
}
// check the contents of the topmost blob of each remote
got := make(map[digest.Digest][]*solver.Remote)
for _, r := range remotes {
require.Equal(t, len(r.Descriptors)-1, idx, "idx = %d", idx)
// record this variant
topmost, lower := r.Descriptors[idx], r.Descriptors[:idx]
got[topmost.Digest] = append(got[topmost.Digest], &solver.Remote{Descriptors: lower, Provider: r.Provider})
// check the contents
r, err := r.Provider.ReaderAt(ctx, topmost)
require.NoError(t, err)
dgstr := digest.Canonical.Digester()
_, err = io.Copy(dgstr.Hash(), io.NewSectionReader(r, 0, topmost.Size))
require.NoError(t, err)
require.NoError(t, r.Close())
require.Equal(t, dgstr.Digest(), topmost.Digest)
}
// check the lowers as well
eg, egctx := errgroup.WithContext(ctx)
for _, lowers := range got {
lowers := lowers
eg.Go(func() error {
checkVariantsCoverage(egctx, t, variants, idx-1, lowers, nil) // expect all compression variants
return nil
})
}
require.NoError(t, eg.Wait())
// check the coverage of the variants
targets := variants[idx]
if expectCompression != nil {
c, ok := variants[idx][*expectCompression]
require.True(t, ok, "idx = %d, compression = %q, variants = %+v, got = %+v", idx, *expectCompression, variants[idx], got)
targets = map[compression.Type]ocispecs.Descriptor{*expectCompression: c}
}
for c, d := range targets {
_, ok := got[d.Digest]
require.True(t, ok, "idx = %d, compression = %q, want = %+v, got = %+v", idx, c, d, got)
delete(got, d.Digest)
}
require.Equal(t, 0, len(got))
}
// Make sure that media type and urls are persisted for non-distributable blobs.
func TestNondistributableBlobs(t *testing.T) {
t.Parallel()
ctx := namespaces.WithNamespace(context.Background(), "buildkit-test")
tmpdir, err := ioutil.TempDir("", "cachemanager")
require.NoError(t, err)
defer os.RemoveAll(tmpdir)
snapshotter, err := native.NewSnapshotter(filepath.Join(tmpdir, "snapshots"))
require.NoError(t, err)
co, cleanup, err := newCacheManager(ctx, cmOpt{
snapshotter: snapshotter,
snapshotterName: "native",
})
require.NoError(t, err)
defer cleanup()
cm := co.manager
ctx, done, err := leaseutil.WithLease(ctx, co.lm, leaseutil.MakeTemporary)
require.NoError(t, err)
defer done(context.TODO())
contentBuffer := contentutil.NewBuffer()
descHandlers := DescHandlers(map[digest.Digest]*DescHandler{})
data, desc, err := mapToBlob(map[string]string{"foo": "bar"}, false)
require.NoError(t, err)
// Pretend like this is non-distributable
desc.MediaType = ocispecs.MediaTypeImageLayerNonDistributable
desc.URLs = []string{"https://buildkit.moby.dev/foo"}
cw, err := contentBuffer.Writer(ctx)
require.NoError(t, err)
_, err = cw.Write(data)
require.NoError(t, err)
err = cw.Commit(ctx, 0, cw.Digest())
require.NoError(t, err)
descHandlers[desc.Digest] = &DescHandler{
Provider: func(_ session.Group) content.Provider { return contentBuffer },
}
ref, err := cm.GetByBlob(ctx, desc, nil, descHandlers)
require.NoError(t, err)
remotes, err := ref.GetRemotes(ctx, true, config.RefConfig{PreferNonDistributable: true}, false, nil)
require.NoError(t, err)
desc2 := remotes[0].Descriptors[0]
require.Equal(t, desc.MediaType, desc2.MediaType)
require.Equal(t, desc.URLs, desc2.URLs)
remotes, err = ref.GetRemotes(ctx, true, config.RefConfig{PreferNonDistributable: false}, false, nil)
require.NoError(t, err)
desc2 = remotes[0].Descriptors[0]
require.Equal(t, ocispecs.MediaTypeImageLayer, desc2.MediaType)
require.Len(t, desc2.URLs, 0)
}
func checkInfo(ctx context.Context, t *testing.T, cs content.Store, info content.Info) {
if info.Labels == nil {
return
}
uncompressedDgst, ok := info.Labels[containerdUncompressed]
if !ok {
return
}
ra, err := cs.ReaderAt(ctx, ocispecs.Descriptor{Digest: info.Digest})
require.NoError(t, err)
defer ra.Close()
decompressR, err := ctdcompression.DecompressStream(io.NewSectionReader(ra, 0, ra.Size()))
require.NoError(t, err)
diffID := digest.Canonical.Digester()
_, err = io.Copy(diffID.Hash(), decompressR)
require.NoError(t, err)
require.Equal(t, diffID.Digest().String(), uncompressedDgst)
}
func checkDescriptor(ctx context.Context, t *testing.T, cs content.Store, desc ocispecs.Descriptor, compressionType compression.Type) {
if desc.Annotations == nil {
return
}
// Check annotations exist
uncompressedDgst, ok := desc.Annotations[containerdUncompressed]
require.True(t, ok, "uncompressed digest annotation not found: %q", desc.Digest)
var uncompressedSize int64
if compressionType == compression.EStargz {
_, ok := desc.Annotations[estargz.TOCJSONDigestAnnotation]
require.True(t, ok, "toc digest annotation not found: %q", desc.Digest)
uncompressedSizeS, ok := desc.Annotations[estargz.StoreUncompressedSizeAnnotation]
require.True(t, ok, "uncompressed size annotation not found: %q", desc.Digest)
var err error
uncompressedSize, err = strconv.ParseInt(uncompressedSizeS, 10, 64)
require.NoError(t, err)
}
// Check annotation values are valid
c := new(counter)
ra, err := cs.ReaderAt(ctx, desc)
if err != nil && errdefs.IsNotFound(err) {
return // lazy layer
}
require.NoError(t, err)
defer ra.Close()
decompressR, err := ctdcompression.DecompressStream(io.NewSectionReader(ra, 0, ra.Size()))
require.NoError(t, err)
diffID := digest.Canonical.Digester()
_, err = io.Copy(io.MultiWriter(diffID.Hash(), c), decompressR)
require.NoError(t, err)
require.Equal(t, diffID.Digest().String(), uncompressedDgst)
if compressionType == compression.EStargz {
require.Equal(t, c.size(), uncompressedSize)
}
}
func TestMergeOp(t *testing.T) {
if runtime.GOOS == "windows" {
t.Skip("Depends on unimplemented merge-op support on Windows")
}
// This just tests the basic Merge method and some of the logic with releasing merge refs.
// Tests for the fs merge logic are in client_test and snapshotter_test.
t.Parallel()
ctx := namespaces.WithNamespace(context.Background(), "buildkit-test")
tmpdir, err := ioutil.TempDir("", "cachemanager")
require.NoError(t, err)
defer os.RemoveAll(tmpdir)
snapshotter, err := native.NewSnapshotter(filepath.Join(tmpdir, "snapshots"))
require.NoError(t, err)
co, cleanup, err := newCacheManager(ctx, cmOpt{
snapshotter: snapshotter,
snapshotterName: "native",
})
require.NoError(t, err)
defer cleanup()
cm := co.manager
emptyMerge, err := cm.Merge(ctx, nil, nil)
require.NoError(t, err)
require.Nil(t, emptyMerge)
var baseRefs []ImmutableRef
for i := 0; i < 6; i++ {
active, err := cm.New(ctx, nil, nil)
require.NoError(t, err)
m, err := active.Mount(ctx, false, nil)
require.NoError(t, err)
lm := snapshot.LocalMounter(m)
target, err := lm.Mount()
require.NoError(t, err)
err = fstest.Apply(
fstest.CreateFile(strconv.Itoa(i), []byte(strconv.Itoa(i)), 0777),
).Apply(target)
require.NoError(t, err)
err = lm.Unmount()
require.NoError(t, err)
snap, err := active.Commit(ctx)
require.NoError(t, err)
baseRefs = append(baseRefs, snap)
size, err := snap.(*immutableRef).size(ctx)
require.NoError(t, err)
require.EqualValues(t, 8192, size)
}
singleMerge, err := cm.Merge(ctx, baseRefs[:1], nil)
require.NoError(t, err)
m, err := singleMerge.Mount(ctx, true, nil)
require.NoError(t, err)
ms, unmount, err := m.Mount()
require.NoError(t, err)
require.Len(t, ms, 1)
require.Equal(t, ms[0].Type, "bind")
err = fstest.CheckDirectoryEqualWithApplier(ms[0].Source, fstest.Apply(
fstest.CreateFile(strconv.Itoa(0), []byte(strconv.Itoa(0)), 0777),
))
require.NoError(t, err)
require.NoError(t, unmount())
require.NoError(t, singleMerge.Release(ctx))
err = cm.Prune(ctx, nil, client.PruneInfo{Filter: []string{
"id==" + singleMerge.ID(),
}})
require.NoError(t, err)
merge1, err := cm.Merge(ctx, baseRefs[:3], nil)
require.NoError(t, err)
_, err = merge1.Mount(ctx, true, nil)
require.NoError(t, err)
size1, err := merge1.(*immutableRef).size(ctx)
require.NoError(t, err)
require.EqualValues(t, 4096, size1) // hardlinking means all but the first snapshot doesn't take up space
checkDiskUsage(ctx, t, cm, 7, 0)
merge2, err := cm.Merge(ctx, baseRefs[3:], nil)
require.NoError(t, err)
_, err = merge2.Mount(ctx, true, nil)
require.NoError(t, err)
size2, err := merge2.(*immutableRef).size(ctx)
require.NoError(t, err)
require.EqualValues(t, 4096, size2)
checkDiskUsage(ctx, t, cm, 8, 0)
for _, ref := range baseRefs {
require.NoError(t, ref.Release(ctx))
}
checkDiskUsage(ctx, t, cm, 8, 0)
// should still be able to use merges based on released refs
merge3, err := cm.Merge(ctx, []ImmutableRef{merge1, merge2}, nil)
require.NoError(t, err)
require.NoError(t, merge1.Release(ctx))
require.NoError(t, merge2.Release(ctx))
_, err = merge3.Mount(ctx, true, nil)
require.NoError(t, err)
size3, err := merge3.(*immutableRef).size(ctx)
require.NoError(t, err)
require.EqualValues(t, 4096, size3)
require.Len(t, merge3.(*immutableRef).mergeParents, 6)
checkDiskUsage(ctx, t, cm, 7, 2)
require.NoError(t, merge3.Release(ctx))
checkDiskUsage(ctx, t, cm, 0, 9)
err = cm.Prune(ctx, nil, client.PruneInfo{All: true})
require.NoError(t, err)
checkDiskUsage(ctx, t, cm, 0, 0)
}
func TestDiffOp(t *testing.T) {
if runtime.GOOS == "windows" {
t.Skip("Depends on unimplemented diff-op support on Windows")
}
// This just tests the basic Diff method and some of the logic with releasing diff refs.
// Tests for the fs diff logic are in client_test and snapshotter_test.
t.Parallel()
ctx := namespaces.WithNamespace(context.Background(), "buildkit-test")
tmpdir, err := ioutil.TempDir("", "cachemanager")
require.NoError(t, err)
defer os.RemoveAll(tmpdir)
snapshotter, err := native.NewSnapshotter(filepath.Join(tmpdir, "snapshots"))
require.NoError(t, err)
co, cleanup, err := newCacheManager(ctx, cmOpt{
snapshotter: snapshotter,
snapshotterName: "native",
})
require.NoError(t, err)
defer cleanup()
cm := co.manager
newLower, err := cm.New(ctx, nil, nil)
require.NoError(t, err)
lowerA, err := newLower.Commit(ctx)
require.NoError(t, err)
newUpper, err := cm.New(ctx, nil, nil)
require.NoError(t, err)
upperA, err := newUpper.Commit(ctx)
require.NoError(t, err)
// verify that releasing parents does not invalidate a diff ref until it is released
diff, err := cm.Diff(ctx, lowerA, upperA, nil)
require.NoError(t, err)
checkDiskUsage(ctx, t, cm, 3, 0)
require.NoError(t, lowerA.Release(ctx))
require.NoError(t, upperA.Release(ctx))
checkDiskUsage(ctx, t, cm, 3, 0)
require.NoError(t, cm.Prune(ctx, nil, client.PruneInfo{All: true}))
checkDiskUsage(ctx, t, cm, 3, 0)
_, err = diff.Mount(ctx, true, nil)
require.NoError(t, err)
require.NoError(t, diff.Release(ctx))
checkDiskUsage(ctx, t, cm, 0, 3)
require.NoError(t, cm.Prune(ctx, nil, client.PruneInfo{All: true}))
checkDiskUsage(ctx, t, cm, 0, 0)
// test "unmerge" diffs that are defined as a merge of single-layer diffs
newRef, err := cm.New(ctx, nil, nil)
require.NoError(t, err)
a, err := newRef.Commit(ctx)
require.NoError(t, err)
newRef, err = cm.New(ctx, a, nil)
require.NoError(t, err)
b, err := newRef.Commit(ctx)
require.NoError(t, err)
newRef, err = cm.New(ctx, b, nil)
require.NoError(t, err)
c, err := newRef.Commit(ctx)
require.NoError(t, err)
newRef, err = cm.New(ctx, c, nil)
require.NoError(t, err)
d, err := newRef.Commit(ctx)
require.NoError(t, err)
newRef, err = cm.New(ctx, d, nil)
require.NoError(t, err)
e, err := newRef.Commit(ctx)
require.NoError(t, err)
diff, err = cm.Diff(ctx, c, e, nil)
require.NoError(t, err)
checkDiskUsage(ctx, t, cm, 8, 0) // 5 base refs + 2 diffs + 1 merge
require.NoError(t, a.Release(ctx))
require.NoError(t, b.Release(ctx))
require.NoError(t, c.Release(ctx))
require.NoError(t, d.Release(ctx))
require.NoError(t, e.Release(ctx))
checkDiskUsage(ctx, t, cm, 8, 0)
require.NoError(t, cm.Prune(ctx, nil, client.PruneInfo{All: true}))
checkDiskUsage(ctx, t, cm, 8, 0)
_, err = diff.Mount(ctx, true, nil)
require.NoError(t, err)
require.NoError(t, diff.Release(ctx))
checkDiskUsage(ctx, t, cm, 0, 8)
require.NoError(t, cm.Prune(ctx, nil, client.PruneInfo{All: true}))
checkDiskUsage(ctx, t, cm, 0, 0)
}
func TestLoadHalfFinalizedRef(t *testing.T) {
// This test simulates the situation where a ref w/ an equalMutable has its
// snapshot committed but there is a crash before the metadata is updated to
// clear the equalMutable field. It's expected that the mutable will be
// removed and the immutable ref will continue to be usable.
t.Parallel()
ctx := namespaces.WithNamespace(context.Background(), "buildkit-test")
tmpdir, err := ioutil.TempDir("", "cachemanager")
require.NoError(t, err)
defer os.RemoveAll(tmpdir)
snapshotter, err := native.NewSnapshotter(filepath.Join(tmpdir, "snapshots"))
require.NoError(t, err)
co, cleanup, err := newCacheManager(ctx, cmOpt{
tmpdir: tmpdir,
snapshotter: snapshotter,
snapshotterName: "native",
})
require.NoError(t, err)
defer cleanup()
cm := co.manager.(*cacheManager)
mref, err := cm.New(ctx, nil, nil, CachePolicyRetain)
require.NoError(t, err)
mutRef := mref.(*mutableRef)
iref, err := mutRef.Commit(ctx)
require.NoError(t, err)
immutRef := iref.(*immutableRef)
require.NoError(t, mref.Release(ctx))
_, err = co.lm.Create(ctx, func(l *leases.Lease) error {
l.ID = immutRef.ID()
l.Labels = map[string]string{
"containerd.io/gc.flat": time.Now().UTC().Format(time.RFC3339Nano),
}
return nil
})
require.NoError(t, err)
err = co.lm.AddResource(ctx, leases.Lease{ID: immutRef.ID()}, leases.Resource{
ID: immutRef.getSnapshotID(),
Type: "snapshots/" + cm.Snapshotter.Name(),
})
require.NoError(t, err)
err = cm.Snapshotter.Commit(ctx, immutRef.getSnapshotID(), mutRef.getSnapshotID())
require.NoError(t, err)
_, err = cm.Snapshotter.Stat(ctx, mutRef.getSnapshotID())
require.Error(t, err)
require.NoError(t, iref.Release(ctx))
require.NoError(t, cm.Close())
require.NoError(t, cleanup())
co, cleanup, err = newCacheManager(ctx, cmOpt{
tmpdir: tmpdir,
snapshotter: snapshotter,
snapshotterName: "native",
})
require.NoError(t, err)
defer cleanup()
cm = co.manager.(*cacheManager)
_, err = cm.GetMutable(ctx, mutRef.ID())
require.ErrorIs(t, err, errNotFound)
iref, err = cm.Get(ctx, immutRef.ID(), nil)
require.NoError(t, err)
require.NoError(t, iref.Finalize(ctx))
immutRef = iref.(*immutableRef)
_, err = cm.Snapshotter.Stat(ctx, immutRef.getSnapshotID())
require.NoError(t, err)
}
func TestMountReadOnly(t *testing.T) {
t.Parallel()
if runtime.GOOS != "linux" {
t.Skipf("unsupported GOOS: %s", runtime.GOOS)
}
ctx := namespaces.WithNamespace(context.Background(), "buildkit-test")
tmpdir, err := ioutil.TempDir("", "cachemanager")
require.NoError(t, err)
defer os.RemoveAll(tmpdir)
snapshotter, err := native.NewSnapshotter(filepath.Join(tmpdir, "snapshots"))
require.NoError(t, err)
co, cleanup, err := newCacheManager(ctx, cmOpt{
snapshotter: snapshotter,
snapshotterName: "overlay",
})
require.NoError(t, err)
defer cleanup()
cm := co.manager
mutRef, err := cm.New(ctx, nil, nil)
require.NoError(t, err)
for i := 0; i < 2; i++ {
rwMntable, err := mutRef.Mount(ctx, false, nil)
require.NoError(t, err)
rwMnts, release, err := rwMntable.Mount()
require.NoError(t, err)
defer release()
require.Len(t, rwMnts, 1)
require.False(t, isReadOnly(rwMnts[0]))
roMntable, err := mutRef.Mount(ctx, true, nil)
require.NoError(t, err)
roMnts, release, err := roMntable.Mount()
require.NoError(t, err)
defer release()
require.Len(t, roMnts, 1)
require.True(t, isReadOnly(roMnts[0]))
immutRef, err := mutRef.Commit(ctx)
require.NoError(t, err)
roMntable, err = immutRef.Mount(ctx, true, nil)
require.NoError(t, err)
roMnts, release, err = roMntable.Mount()
require.NoError(t, err)
defer release()
require.Len(t, roMnts, 1)
require.True(t, isReadOnly(roMnts[0]))
rwMntable, err = immutRef.Mount(ctx, false, nil)
require.NoError(t, err)
rwMnts, release, err = rwMntable.Mount()
require.NoError(t, err)
defer release()
require.Len(t, rwMnts, 1)
// once immutable, even when readonly=false, the mount is still readonly
require.True(t, isReadOnly(rwMnts[0]))
// repeat with a ref that has a parent
mutRef, err = cm.New(ctx, immutRef, nil)
require.NoError(t, err)
}
}
func checkDiskUsage(ctx context.Context, t *testing.T, cm Manager, inuse, unused int) {
du, err := cm.DiskUsage(ctx, client.DiskUsageInfo{})
require.NoError(t, err)
var inuseActual, unusedActual int
for _, r := range du {
if r.InUse {
inuseActual++
} else {
unusedActual++
}
}
require.Equal(t, inuse, inuseActual)
require.Equal(t, unused, unusedActual)
}
func esgzBlobDigest(uncompressedBlobBytes []byte) (blobDigest digest.Digest, err error) {
esgzDigester := digest.Canonical.Digester()
w := estargz.NewWriter(esgzDigester.Hash())
if err := w.AppendTarLossLess(bytes.NewReader(uncompressedBlobBytes)); err != nil {
return "", err
}
if _, err := w.Close(); err != nil {
return "", err
}
return esgzDigester.Digest(), nil
}
func zstdBlobDigest(uncompressedBlobBytes []byte) (digest.Digest, error) {
b := bytes.NewBuffer(nil)
w, err := zstd.NewWriter(b)
if err != nil {
return "", err
}
if _, err := w.Write(uncompressedBlobBytes); err != nil {
return "", err
}
if err := w.Close(); err != nil {
return "", err
}
return digest.FromBytes(b.Bytes()), nil
}
func checkNumBlobs(ctx context.Context, t *testing.T, cs content.Store, expected int) {
c := 0
err := cs.Walk(ctx, func(_ content.Info) error {
c++
return nil
})
require.NoError(t, err)
require.Equal(t, expected, c)
}
func pruneResultBuffer() *buf {
b := &buf{C: make(chan client.UsageInfo), closed: make(chan struct{})}
go func() {
for c := range b.C {
b.all = append(b.all, c)
}
close(b.closed)
}()
return b
}
type buf struct {
C chan client.UsageInfo
closed chan struct{}
all []client.UsageInfo
}
func (b *buf) close() {
close(b.C)
<-b.closed
}
type bufferCloser struct {
*bytes.Buffer
}
func (b bufferCloser) Close() error {
return nil
}
func mapToBlob(m map[string]string, compress bool) ([]byte, ocispecs.Descriptor, error) {
if !compress {
return mapToBlobWithCompression(m, nil)
}
return mapToBlobWithCompression(m, func(w io.Writer) (io.WriteCloser, string, error) {
return gzip.NewWriter(w), ocispecs.MediaTypeImageLayerGzip, nil
})
}
func mapToBlobWithCompression(m map[string]string, compress func(io.Writer) (io.WriteCloser, string, error)) ([]byte, ocispecs.Descriptor, error) {
buf := bytes.NewBuffer(nil)
sha := digest.SHA256.Digester()
var dest io.WriteCloser = bufferCloser{buf}
mediaType := ocispecs.MediaTypeImageLayer
if compress != nil {
var err error
dest, mediaType, err = compress(buf)
if err != nil {
return nil, ocispecs.Descriptor{}, err
}
}
tw := tar.NewWriter(io.MultiWriter(sha.Hash(), dest))
for k, v := range m {
if err := tw.WriteHeader(&tar.Header{
Name: k,
Size: int64(len(v)),
}); err != nil {
return nil, ocispecs.Descriptor{}, err
}
if _, err := tw.Write([]byte(v)); err != nil {
return nil, ocispecs.Descriptor{}, err
}
}
if err := tw.Close(); err != nil {
return nil, ocispecs.Descriptor{}, err
}
if err := dest.Close(); err != nil {
return nil, ocispecs.Descriptor{}, err
}
return buf.Bytes(), ocispecs.Descriptor{
Digest: digest.FromBytes(buf.Bytes()),
MediaType: mediaType,
Size: int64(buf.Len()),
Annotations: map[string]string{
"containerd.io/uncompressed": sha.Digest().String(),
},
}, nil
}
func fileToBlob(file *os.File, compress bool) ([]byte, ocispecs.Descriptor, error) {
buf := bytes.NewBuffer(nil)
sha := digest.SHA256.Digester()
var dest io.WriteCloser = bufferCloser{buf}
if compress {
dest = gzip.NewWriter(buf)
}
tw := tar.NewWriter(io.MultiWriter(sha.Hash(), dest))
info, err := file.Stat()
if err != nil {
return nil, ocispecs.Descriptor{}, err
}
fi, err := tar.FileInfoHeader(info, "")
if err != nil {
return nil, ocispecs.Descriptor{}, err
}
fi.Format = tar.FormatPAX
fi.ModTime = fi.ModTime.Truncate(time.Second)
fi.AccessTime = time.Time{}
fi.ChangeTime = time.Time{}
if err := tw.WriteHeader(fi); err != nil {
return nil, ocispecs.Descriptor{}, err
}
if _, err := io.Copy(tw, file); err != nil {
return nil, ocispecs.Descriptor{}, err
}
if err := tw.Close(); err != nil {
return nil, ocispecs.Descriptor{}, err
}
if err := dest.Close(); err != nil {
return nil, ocispecs.Descriptor{}, err
}
mediaType := ocispecs.MediaTypeImageLayer
if compress {
mediaType = ocispecs.MediaTypeImageLayerGzip
}
return buf.Bytes(), ocispecs.Descriptor{
Digest: digest.FromBytes(buf.Bytes()),
MediaType: mediaType,
Size: int64(buf.Len()),
Annotations: map[string]string{
"containerd.io/uncompressed": sha.Digest().String(),
},
}, nil
}
func mapToSystemTarBlob(m map[string]string) ([]byte, ocispecs.Descriptor, error) {
tmpdir, err := ioutil.TempDir("", "tarcreation")
if err != nil {
return nil, ocispecs.Descriptor{}, err
}
defer os.RemoveAll(tmpdir)
expected := map[string]string{}
for k, v := range m {
expected[k] = v
if err := ioutil.WriteFile(filepath.Join(tmpdir, k), []byte(v), 0600); err != nil {
return nil, ocispecs.Descriptor{}, err
}
}
cmd := exec.Command("tar", "-C", tmpdir, "-c", ".")
tarout, err := cmd.Output()
if err != nil {
return nil, ocispecs.Descriptor{}, err
}
tr := tar.NewReader(bytes.NewReader(tarout))
for {
h, err := tr.Next()
if err == io.EOF {
break
}
if err != nil {
return nil, ocispecs.Descriptor{}, err
}
k := strings.TrimPrefix(filepath.Clean("/"+h.Name), "/")
if k == "" {
continue // ignore the root entry
}
v, ok := expected[k]
if !ok {
return nil, ocispecs.Descriptor{}, errors.Errorf("unexpected file %s", h.Name)
}
delete(expected, k)
gotV, err := ioutil.ReadAll(tr)
if err != nil {
return nil, ocispecs.Descriptor{}, err
}
if string(gotV) != string(v) {
return nil, ocispecs.Descriptor{}, errors.Errorf("unexpected contents of %s", h.Name)
}
}
if len(expected) > 0 {
return nil, ocispecs.Descriptor{}, errors.Errorf("expected file doesn't archived: %+v", expected)
}
return tarout, ocispecs.Descriptor{
Digest: digest.FromBytes(tarout),
MediaType: ocispecs.MediaTypeImageLayer,
Size: int64(len(tarout)),
Annotations: map[string]string{
"containerd.io/uncompressed": digest.FromBytes(tarout).String(),
},
}, nil
}
func isReadOnly(mnt mount.Mount) bool {
var hasUpperdir bool
for _, o := range mnt.Options {
if o == "ro" {
return true
} else if strings.HasPrefix(o, "upperdir=") {
hasUpperdir = true
}
}
if mnt.Type == "overlay" {
return !hasUpperdir
}
return false
}
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