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Add pull through cache functionality to the Registry which can be configured

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with a new `proxy` section in the configuration file.

Create a new registry type which delegates storage to a proxyBlobStore
and proxyManifestStore.  These stores will pull through data if not present
locally.  proxyBlobStore takes care not to write duplicate data to disk.

Add a scheduler to cleanup expired content. The scheduler runs as a background
goroutine.  When a blob or manifest is pulled through from the remote registry,
an entry is added to the scheduler with a TTL.  When the TTL expires the
scheduler calls a pre-specified function to remove the fetched resource.

Add token authentication to the registry middleware.  Get a token at startup
and preload the credential store with the username and password supplied in the
config file.

Allow resumable digest functionality to be disabled at runtime and disable
it when the registry is a pull through cache.

Signed-off-by: Richard Scothern <richard.scothern@gmail.com>
This commit is contained in:
Richard Scothern 2015-07-29 11:12:01 -07:00
parent 9dac3cc571
commit d1cb12fa3d
24 changed files with 1682 additions and 38 deletions
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22
docs/storage/linkedblobstore.go
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@ -16,11 +16,12 @@ import (
// that grant access to the global blob store.
type linkedBlobStore struct {
*blobStore
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
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
resumableDigestEnabled bool
// linkPath allows one to control the repository blob link set to which
// the blob store dispatches. This is required because manifest and layer
@ -189,11 +190,12 @@ func (lbs *linkedBlobStore) newBlobUpload(ctx context.Context, uuid, path string
}
bw := &blobWriter{
blobStore: lbs,
id: uuid,
startedAt: startedAt,
digester: digest.Canonical.New(),
bufferedFileWriter: *fw,
blobStore: lbs,
id: uuid,
startedAt: startedAt,
digester: digest.Canonical.New(),
bufferedFileWriter: *fw,
resumableDigestEnabled: lbs.resumableDigestEnabled,
}
return bw, nil