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Manifest and layer soft deletion.

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Implement the delete API by implementing soft delete for layers
and blobs by removing link files and updating the blob descriptor
cache.  Deletion is configurable - if it is disabled API calls
will return an unsupported error.

We invalidate the blob descriptor cache by changing the linkedBlobStore's
blobStatter to a blobDescriptorService and naming it blobAccessController.

Delete() is added throughout the relevant API to support this functionality.

Signed-off-by: Richard Scothern <richard.scothern@gmail.com>
This commit is contained in:
Richard 2015-05-27 10:52:22 -07:00 • committed by Richard Scothern
parent 7dbe35176d
commit 390bb97a88
21 changed files with 816 additions and 92 deletions
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87
docs/storage/blob_test.go
View file

@ -21,13 +21,11 @@ import (
// error paths that might be seen during an upload.
func TestSimpleBlobUpload(t *testing.T) {
randomDataReader, tarSumStr, err := testutil.CreateRandomTarFile()
if err != nil {
t.Fatalf("error creating random reader: %v", err)
}
dgst := digest.Digest(tarSumStr)
if err != nil {
t.Fatalf("error allocating upload store: %v", err)
}
@ -35,7 +33,7 @@ func TestSimpleBlobUpload(t *testing.T) {
ctx := context.Background()
imageName := "foo/bar"
driver := inmemory.New()
registry := NewRegistryWithDriver(ctx, driver, memory.NewInMemoryBlobDescriptorCacheProvider())
registry := NewRegistryWithDriver(ctx, driver, memory.NewInMemoryBlobDescriptorCacheProvider(), true)
repository, err := registry.Repository(ctx, imageName)
if err != nil {
t.Fatalf("unexpected error getting repo: %v", err)
@ -139,6 +137,72 @@ func TestSimpleBlobUpload(t *testing.T) {
if digest.NewDigest("sha256", h) != sha256Digest {
t.Fatalf("unexpected digest from uploaded layer: %q != %q", digest.NewDigest("sha256", h), sha256Digest)
}
// Delete a blob
err = bs.Delete(ctx, desc.Digest)
if err != nil {
t.Fatalf("Unexpected error deleting blob")
}
d, err := bs.Stat(ctx, desc.Digest)
if err == nil {
t.Fatalf("unexpected non-error stating deleted blob: %s", d)
}
switch err {
case distribution.ErrBlobUnknown:
break
default:
t.Errorf("Unexpected error type stat-ing deleted manifest: %#v", err)
}
_, err = bs.Open(ctx, desc.Digest)
if err == nil {
t.Fatalf("unexpected success opening deleted blob for read")
}
switch err {
case distribution.ErrBlobUnknown:
break
default:
t.Errorf("Unexpected error type getting deleted manifest: %#v", err)
}
// Re-upload the blob
randomBlob, err := ioutil.ReadAll(randomDataReader)
if err != nil {
t.Fatalf("Error reading all of blob %s", err.Error())
}
expectedDigest, err := digest.FromBytes(randomBlob)
if err != nil {
t.Fatalf("Error getting digest from bytes: %s", err)
}
simpleUpload(t, bs, randomBlob, expectedDigest)
d, err = bs.Stat(ctx, expectedDigest)
if err != nil {
t.Errorf("unexpected error stat-ing blob")
}
if d.Digest != expectedDigest {
t.Errorf("Mismatching digest with restored blob")
}
_, err = bs.Open(ctx, expectedDigest)
if err != nil {
t.Errorf("Unexpected error opening blob")
}
// Reuse state to test delete with a delete-disabled registry
registry = NewRegistryWithDriver(ctx, driver, memory.NewInMemoryBlobDescriptorCacheProvider(), false)
repository, err = registry.Repository(ctx, imageName)
if err != nil {
t.Fatalf("unexpected error getting repo: %v", err)
}
bs = repository.Blobs(ctx)
err = bs.Delete(ctx, desc.Digest)
if err == nil {
t.Errorf("Unexpected success deleting while disabled")
}
}
// TestSimpleBlobRead just creates a simple blob file and ensures that basic
@ -148,7 +212,7 @@ func TestSimpleBlobRead(t *testing.T) {
ctx := context.Background()
imageName := "foo/bar"
driver := inmemory.New()
registry := NewRegistryWithDriver(ctx, driver, memory.NewInMemoryBlobDescriptorCacheProvider())
registry := NewRegistryWithDriver(ctx, driver, memory.NewInMemoryBlobDescriptorCacheProvider(), true)
repository, err := registry.Repository(ctx, imageName)
if err != nil {
t.Fatalf("unexpected error getting repo: %v", err)
@ -252,19 +316,24 @@ func TestLayerUploadZeroLength(t *testing.T) {
ctx := context.Background()
imageName := "foo/bar"
driver := inmemory.New()
registry := NewRegistryWithDriver(ctx, driver, memory.NewInMemoryBlobDescriptorCacheProvider())
registry := NewRegistryWithDriver(ctx, driver, memory.NewInMemoryBlobDescriptorCacheProvider(), true)
repository, err := registry.Repository(ctx, imageName)
if err != nil {
t.Fatalf("unexpected error getting repo: %v", err)
}
bs := repository.Blobs(ctx)
simpleUpload(t, bs, []byte{}, digest.DigestSha256EmptyTar)
}
func simpleUpload(t *testing.T, bs distribution.BlobIngester, blob []byte, expectedDigest digest.Digest) {
ctx := context.Background()
wr, err := bs.Create(ctx)
if err != nil {
t.Fatalf("unexpected error starting upload: %v", err)
}
nn, err := io.Copy(wr, bytes.NewReader([]byte{}))
nn, err := io.Copy(wr, bytes.NewReader(blob))
if err != nil {
t.Fatalf("error copying into blob writer: %v", err)
}
@ -273,12 +342,12 @@ func TestLayerUploadZeroLength(t *testing.T) {
t.Fatalf("unexpected number of bytes copied: %v > 0", nn)
}
dgst, err := digest.FromReader(bytes.NewReader([]byte{}))
dgst, err := digest.FromReader(bytes.NewReader(blob))
if err != nil {
t.Fatalf("error getting zero digest: %v", err)
t.Fatalf("error getting digest: %v", err)
}
if dgst != digest.DigestSha256EmptyTar {
if dgst != expectedDigest {
// sanity check on zero digest
t.Fatalf("digest not as expected: %v != %v", dgst, digest.DigestTarSumV1EmptyTar)
}