vbatts/registry
1
0
Fork 0
Code Issues Pull requests Releases Wiki Activity

Manifest and layer soft deletion.

Browse source 
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
Download patch file Download diff file Expand all files Collapse all files

56
docs/storage/linkedblobstore.go
View file

@ -16,10 +16,11 @@ import (
// that grant access to the global blob store.
type linkedBlobStore struct {
*blobStore
blobServer distribution.BlobServer
statter distribution.BlobStatter
repository distribution.Repository
ctx context.Context // only to be used where context can't come through method args
blobServer distribution.BlobServer
blobAccessController distribution.BlobDescriptorService
repository distribution.Repository
ctx context.Context // only to be used where context can't come through method args
deleteEnabled bool
// linkPath allows one to control the repository blob link set to which
// the blob store dispatches. This is required because manifest and layer
@ -31,7 +32,7 @@ type linkedBlobStore struct {
var _ distribution.BlobStore = &linkedBlobStore{}
func (lbs *linkedBlobStore) Stat(ctx context.Context, dgst digest.Digest) (distribution.Descriptor, error) {
return lbs.statter.Stat(ctx, dgst)
return lbs.blobAccessController.Stat(ctx, dgst)
}
func (lbs *linkedBlobStore) Get(ctx context.Context, dgst digest.Digest) ([]byte, error) {
@ -67,6 +68,10 @@ func (lbs *linkedBlobStore) ServeBlob(ctx context.Context, w http.ResponseWriter
}
func (lbs *linkedBlobStore) Put(ctx context.Context, mediaType string, p []byte) (distribution.Descriptor, error) {
dgst, err := digest.FromBytes(p)
if err != nil {
return distribution.Descriptor{}, err
}
// Place the data in the blob store first.
desc, err := lbs.blobStore.Put(ctx, mediaType, p)
if err != nil {
@ -74,6 +79,10 @@ func (lbs *linkedBlobStore) Put(ctx context.Context, mediaType string, p []byte)
return distribution.Descriptor{}, err
}
if err := lbs.blobAccessController.SetDescriptor(ctx, dgst, desc); err != nil {
return distribution.Descriptor{}, err
}
// TODO(stevvooe): Write out mediatype if incoming differs from what is
// returned by Put above. Note that we should allow updates for a given
// repository.
@ -153,7 +162,26 @@ func (lbs *linkedBlobStore) Resume(ctx context.Context, id string) (distribution
return lbs.newBlobUpload(ctx, id, path, startedAt)
}
// newLayerUpload allocates a new upload controller with the given state.
func (lbs *linkedBlobStore) Delete(ctx context.Context, dgst digest.Digest) error {
if !lbs.deleteEnabled {
return distribution.ErrUnsupported
}
// Ensure the blob is available for deletion
_, err := lbs.blobAccessController.Stat(ctx, dgst)
if err != nil {
return err
}
err = lbs.blobAccessController.Clear(ctx, dgst)
if err != nil {
return err
}
return nil
}
// newBlobUpload allocates a new upload controller with the given state.
func (lbs *linkedBlobStore) newBlobUpload(ctx context.Context, uuid, path string, startedAt time.Time) (distribution.BlobWriter, error) {
fw, err := newFileWriter(ctx, lbs.driver, path)
if err != nil {
@ -213,7 +241,7 @@ type linkedBlobStatter struct {
linkPath func(pm *pathMapper, name string, dgst digest.Digest) (string, error)
}
var _ distribution.BlobStatter = &linkedBlobStatter{}
var _ distribution.BlobDescriptorService = &linkedBlobStatter{}
func (lbs *linkedBlobStatter) Stat(ctx context.Context, dgst digest.Digest) (distribution.Descriptor, error) {
blobLinkPath, err := lbs.linkPath(lbs.pm, lbs.repository.Name(), dgst)
@ -246,6 +274,20 @@ func (lbs *linkedBlobStatter) Stat(ctx context.Context, dgst digest.Digest) (dis
return lbs.blobStore.statter.Stat(ctx, target)
}
func (lbs *linkedBlobStatter) Clear(ctx context.Context, dgst digest.Digest) error {
blobLinkPath, err := lbs.linkPath(lbs.pm, lbs.repository.Name(), dgst)
if err != nil {
return err
}
return lbs.blobStore.driver.Delete(ctx, blobLinkPath)
}
func (lbs *linkedBlobStatter) SetDescriptor(ctx context.Context, dgst digest.Digest, desc distribution.Descriptor) error {
// The canonical descriptor for a blob is set at the commit phase of upload
return nil
}
// blobLinkPath provides the path to the blob link, also known as layers.
func blobLinkPath(pm *pathMapper, name string, dgst digest.Digest) (string, error) {
return pm.path(layerLinkPathSpec{name: name, digest: dgst})