distribution/registry/storage/garbagecollect_test.go

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package storage
import (
"io"
"path"
"testing"
"github.com/docker/distribution"
"github.com/docker/distribution/context"
"github.com/docker/distribution/reference"
"github.com/docker/distribution/registry/storage/driver"
"github.com/docker/distribution/registry/storage/driver/inmemory"
"github.com/docker/distribution/testutil"
"github.com/docker/libtrust"
"github.com/opencontainers/go-digest"
)
type image struct {
manifest distribution.Manifest
manifestDigest digest.Digest
layers map[digest.Digest]io.ReadSeeker
}
func createRegistry(t *testing.T, driver driver.StorageDriver, options ...RegistryOption) distribution.Namespace {
ctx := context.Background()
k, err := libtrust.GenerateECP256PrivateKey()
if err != nil {
t.Fatal(err)
}
options = append([]RegistryOption{EnableDelete, Schema1SigningKey(k)}, options...)
registry, err := NewRegistry(ctx, driver, options...)
if err != nil {
t.Fatalf("Failed to construct namespace")
}
return registry
}
func makeRepository(t *testing.T, registry distribution.Namespace, name string) distribution.Repository {
ctx := context.Background()
// Initialize a dummy repository
named, err := reference.ParseNamed(name)
if err != nil {
t.Fatalf("Failed to parse name %s: %v", name, err)
}
repo, err := registry.Repository(ctx, named)
if err != nil {
t.Fatalf("Failed to construct repository: %v", err)
}
return repo
}
func makeManifestService(t *testing.T, repository distribution.Repository) distribution.ManifestService {
ctx := context.Background()
manifestService, err := repository.Manifests(ctx)
if err != nil {
t.Fatalf("Failed to construct manifest store: %v", err)
}
return manifestService
}
func allBlobs(t *testing.T, registry distribution.Namespace) map[digest.Digest]struct{} {
ctx := context.Background()
blobService := registry.Blobs()
allBlobsMap := make(map[digest.Digest]struct{})
err := blobService.Enumerate(ctx, func(dgst digest.Digest) error {
allBlobsMap[dgst] = struct{}{}
return nil
})
if err != nil {
t.Fatalf("Error getting all blobs: %v", err)
}
return allBlobsMap
}
func uploadImage(t *testing.T, repository distribution.Repository, im image) digest.Digest {
// upload layers
err := testutil.UploadBlobs(repository, im.layers)
if err != nil {
t.Fatalf("layer upload failed: %v", err)
}
// upload manifest
ctx := context.Background()
manifestService := makeManifestService(t, repository)
manifestDigest, err := manifestService.Put(ctx, im.manifest)
if err != nil {
t.Fatalf("manifest upload failed: %v", err)
}
return manifestDigest
}
func uploadRandomSchema1Image(t *testing.T, repository distribution.Repository) image {
randomLayers, err := testutil.CreateRandomLayers(2)
if err != nil {
t.Fatalf("%v", err)
}
digests := []digest.Digest{}
for digest := range randomLayers {
digests = append(digests, digest)
}
manifest, err := testutil.MakeSchema1Manifest(digests)
if err != nil {
t.Fatalf("%v", err)
}
manifestDigest := uploadImage(t, repository, image{manifest: manifest, layers: randomLayers})
return image{
manifest: manifest,
manifestDigest: manifestDigest,
layers: randomLayers,
}
}
func uploadRandomSchema2Image(t *testing.T, repository distribution.Repository) image {
randomLayers, err := testutil.CreateRandomLayers(2)
if err != nil {
t.Fatalf("%v", err)
}
digests := []digest.Digest{}
for digest := range randomLayers {
digests = append(digests, digest)
}
manifest, err := testutil.MakeSchema2Manifest(repository, digests)
if err != nil {
t.Fatalf("%v", err)
}
manifestDigest := uploadImage(t, repository, image{manifest: manifest, layers: randomLayers})
return image{
manifest: manifest,
manifestDigest: manifestDigest,
layers: randomLayers,
}
}
func TestNoDeletionNoEffect(t *testing.T) {
ctx := context.Background()
inmemoryDriver := inmemory.New()
registry := createRegistry(t, inmemoryDriver)
repo := makeRepository(t, registry, "palailogos")
manifestService, err := repo.Manifests(ctx)
image1 := uploadRandomSchema1Image(t, repo)
image2 := uploadRandomSchema1Image(t, repo)
uploadRandomSchema2Image(t, repo)
// construct manifestlist for fun.
blobstatter := registry.BlobStatter()
manifestList, err := testutil.MakeManifestList(blobstatter, []digest.Digest{
image1.manifestDigest, image2.manifestDigest})
if err != nil {
t.Fatalf("Failed to make manifest list: %v", err)
}
_, err = manifestService.Put(ctx, manifestList)
if err != nil {
t.Fatalf("Failed to add manifest list: %v", err)
}
before := allBlobs(t, registry)
// Run GC
err = MarkAndSweep(context.Background(), inmemoryDriver, registry, false)
if err != nil {
t.Fatalf("Failed mark and sweep: %v", err)
}
after := allBlobs(t, registry)
if len(before) != len(after) {
t.Fatalf("Garbage collection affected storage: %d != %d", len(before), len(after))
}
}
func TestGCWithMissingManifests(t *testing.T) {
ctx := context.Background()
d := inmemory.New()
registry := createRegistry(t, d)
repo := makeRepository(t, registry, "testrepo")
uploadRandomSchema1Image(t, repo)
// Simulate a missing _manifests directory
revPath, err := pathFor(manifestRevisionsPathSpec{"testrepo"})
if err != nil {
t.Fatal(err)
}
_manifestsPath := path.Dir(revPath)
err = d.Delete(ctx, _manifestsPath)
if err != nil {
t.Fatal(err)
}
err = MarkAndSweep(context.Background(), d, registry, false)
if err != nil {
t.Fatalf("Failed mark and sweep: %v", err)
}
blobs := allBlobs(t, registry)
if len(blobs) > 0 {
t.Errorf("unexpected blobs after gc")
}
}
func TestDeletionHasEffect(t *testing.T) {
ctx := context.Background()
inmemoryDriver := inmemory.New()
registry := createRegistry(t, inmemoryDriver)
repo := makeRepository(t, registry, "komnenos")
manifests, err := repo.Manifests(ctx)
image1 := uploadRandomSchema1Image(t, repo)
image2 := uploadRandomSchema1Image(t, repo)
image3 := uploadRandomSchema2Image(t, repo)
manifests.Delete(ctx, image2.manifestDigest)
manifests.Delete(ctx, image3.manifestDigest)
// Run GC
err = MarkAndSweep(context.Background(), inmemoryDriver, registry, false)
if err != nil {
t.Fatalf("Failed mark and sweep: %v", err)
}
blobs := allBlobs(t, registry)
// check that the image1 manifest and all the layers are still in blobs
if _, ok := blobs[image1.manifestDigest]; !ok {
t.Fatalf("First manifest is missing")
}
for layer := range image1.layers {
if _, ok := blobs[layer]; !ok {
t.Fatalf("manifest 1 layer is missing: %v", layer)
}
}
// check that image2 and image3 layers are not still around
for layer := range image2.layers {
if _, ok := blobs[layer]; ok {
t.Fatalf("manifest 2 layer is present: %v", layer)
}
}
for layer := range image3.layers {
if _, ok := blobs[layer]; ok {
t.Fatalf("manifest 3 layer is present: %v", layer)
}
}
}
func getAnyKey(digests map[digest.Digest]io.ReadSeeker) (d digest.Digest) {
for d = range digests {
break
}
return
}
func getKeys(digests map[digest.Digest]io.ReadSeeker) (ds []digest.Digest) {
for d := range digests {
ds = append(ds, d)
}
return
}
func TestDeletionWithSharedLayer(t *testing.T) {
ctx := context.Background()
inmemoryDriver := inmemory.New()
registry := createRegistry(t, inmemoryDriver)
repo := makeRepository(t, registry, "tzimiskes")
// Create random layers
randomLayers1, err := testutil.CreateRandomLayers(3)
if err != nil {
t.Fatalf("failed to make layers: %v", err)
}
randomLayers2, err := testutil.CreateRandomLayers(3)
if err != nil {
t.Fatalf("failed to make layers: %v", err)
}
// Upload all layers
err = testutil.UploadBlobs(repo, randomLayers1)
if err != nil {
t.Fatalf("failed to upload layers: %v", err)
}
err = testutil.UploadBlobs(repo, randomLayers2)
if err != nil {
t.Fatalf("failed to upload layers: %v", err)
}
// Construct manifests
manifest1, err := testutil.MakeSchema1Manifest(getKeys(randomLayers1))
if err != nil {
t.Fatalf("failed to make manifest: %v", err)
}
sharedKey := getAnyKey(randomLayers1)
manifest2, err := testutil.MakeSchema2Manifest(repo, append(getKeys(randomLayers2), sharedKey))
if err != nil {
t.Fatalf("failed to make manifest: %v", err)
}
manifestService := makeManifestService(t, repo)
// Upload manifests
_, err = manifestService.Put(ctx, manifest1)
if err != nil {
t.Fatalf("manifest upload failed: %v", err)
}
manifestDigest2, err := manifestService.Put(ctx, manifest2)
if err != nil {
t.Fatalf("manifest upload failed: %v", err)
}
// delete
err = manifestService.Delete(ctx, manifestDigest2)
if err != nil {
t.Fatalf("manifest deletion failed: %v", err)
}
// check that all of the layers in layer 1 are still there
blobs := allBlobs(t, registry)
for dgst := range randomLayers1 {
if _, ok := blobs[dgst]; !ok {
t.Fatalf("random layer 1 blob missing: %v", dgst)
}
}
}
func TestOrphanBlobDeleted(t *testing.T) {
inmemoryDriver := inmemory.New()
registry := createRegistry(t, inmemoryDriver)
repo := makeRepository(t, registry, "michael_z_doukas")
digests, err := testutil.CreateRandomLayers(1)
if err != nil {
t.Fatalf("Failed to create random digest: %v", err)
}
if err = testutil.UploadBlobs(repo, digests); err != nil {
t.Fatalf("Failed to upload blob: %v", err)
}
// formality to create the necessary directories
uploadRandomSchema2Image(t, repo)
// Run GC
err = MarkAndSweep(context.Background(), inmemoryDriver, registry, false)
if err != nil {
t.Fatalf("Failed mark and sweep: %v", err)
}
blobs := allBlobs(t, registry)
// check that orphan blob layers are not still around
for dgst := range digests {
if _, ok := blobs[dgst]; ok {
t.Fatalf("Orphan layer is present: %v", dgst)
}
}
}