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Adds cross-repository blob mounting behavior

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Extends blob upload POST endpoint to support mount and from query
parameters as described in #634

Signed-off-by: Brian Bland <brian.bland@docker.com>
This commit is contained in:
Brian Bland 2015-12-14 18:34:18 -08:00
parent a7ae88da45
commit 5df21570a7
15 changed files with 688 additions and 16 deletions
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23
registry/storage/linkedblobstore.go
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@ -20,6 +20,7 @@ type linkPathFunc func(name string, dgst digest.Digest) (string, error)
// that grant access to the global blob store.
type linkedBlobStore struct {
*blobStore
registry *registry
blobServer distribution.BlobServer
blobAccessController distribution.BlobDescriptorService
repository distribution.Repository
@ -185,6 +186,28 @@ func (lbs *linkedBlobStore) Delete(ctx context.Context, dgst digest.Digest) erro
return nil
}
func (lbs *linkedBlobStore) Mount(ctx context.Context, sourceRepo string, dgst digest.Digest) (distribution.Descriptor, error) {
repo, err := lbs.registry.Repository(ctx, sourceRepo)
if err != nil {
return distribution.Descriptor{}, err
}
stat, err := repo.Blobs(ctx).Stat(ctx, dgst)
if err != nil {
return distribution.Descriptor{}, err
}
desc := distribution.Descriptor{
Size: stat.Size,
// NOTE(stevvooe): The central blob store firewalls media types from
// other users. The caller should look this up and override the value
// for the specific repository.
MediaType: "application/octet-stream",
Digest: dgst,
}
return desc, lbs.linkBlob(ctx, desc)
}
// 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)