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Add namespaced snapshotter implementation

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The namespaced snapshotter wraps an existing snapshotter and
enforces namespace.

Signed-off-by: Derek McGowan <derek@mcgstyle.net>
This commit is contained in:
Derek McGowan
2017-06-21 15:51:16 -07:00
parent 7ddf411ea8
commit 4ba4f3a1d5
6 changed files with 342 additions and 13 deletions
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13
metadata/buckets.go
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@@ -32,6 +32,7 @@ var (
bucketKeyObjectIndexes = []byte("indexes") // reserved
bucketKeyObjectImages = []byte("images") // stores image objects
bucketKeyObjectContainers = []byte("containers") // stores container objects
bucketKeyObjectSnapshots = []byte("snapshots") // stores snapshot references
bucketKeyDigest = []byte("digest")
bucketKeyMediaType = []byte("mediatype")
@@ -125,3 +126,15 @@ func getContainersBucket(tx *bolt.Tx, namespace string) *bolt.Bucket {
func getContainerBucket(tx *bolt.Tx, namespace, id string) *bolt.Bucket {
return getBucket(tx, bucketKeyVersion, []byte(namespace), bucketKeyObjectContainers, []byte(id))
}
func createSnapshotterBucket(tx *bolt.Tx, namespace, snapshotter string) (*bolt.Bucket, error) {
bkt, err := createBucketIfNotExists(tx, bucketKeyVersion, []byte(namespace), bucketKeyObjectSnapshots, []byte(snapshotter))
if err != nil {
return nil, err
}
return bkt, nil
}
func getSnapshotterBucket(tx *bolt.Tx, namespace, snapshotter string) *bolt.Bucket {
return getBucket(tx, bucketKeyVersion, []byte(namespace), bucketKeyObjectSnapshots, []byte(snapshotter))
}