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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 2445340f37
commit 9c1dd69439
27 changed files with 886 additions and 95 deletions
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14
blobs.go
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@ -27,6 +27,9 @@ var (
// ErrBlobInvalidLength returned when the blob has an expected length on
// commit, meaning mismatched with the descriptor or an invalid value.
ErrBlobInvalidLength = errors.New("blob invalid length")
// ErrUnsupported returned when an unsupported operation is attempted
ErrUnsupported = errors.New("unsupported operation")
)
// ErrBlobInvalidDigest returned when digest check fails.
@ -70,6 +73,11 @@ type BlobStatter interface {
Stat(ctx context.Context, dgst digest.Digest) (Descriptor, error)
}
// BlobDeleter enables deleting blobs from storage.
type BlobDeleter interface {
Delete(ctx context.Context, dgst digest.Digest) error
}
// BlobDescriptorService manages metadata about a blob by digest. Most
// implementations will not expose such an interface explicitly. Such mappings
// should be maintained by interacting with the BlobIngester. Hence, this is
@ -87,6 +95,9 @@ type BlobDescriptorService interface {
// the restriction that the algorithm of the descriptor must match the
// canonical algorithm (ie sha256) of the annotator.
SetDescriptor(ctx context.Context, dgst digest.Digest, desc Descriptor) error
// Clear enables descriptors to be unlinked
Clear(ctx context.Context, dgst digest.Digest) error
}
// ReadSeekCloser is the primary reader type for blob data, combining
@ -183,8 +194,9 @@ type BlobService interface {
}
// BlobStore represent the entire suite of blob related operations. Such an
// implementation can access, read, write and serve blobs.
// implementation can access, read, write, delete and serve blobs.
type BlobStore interface {
BlobService
BlobServer
BlobDeleter
}