This changeset modifies the metadata store to allow one to set a
"content sharing policy" that defines how blobs are shared between
namespaces in the content store.
The default mode "shared" will make blobs available in all namespaces
once it is pulled into any namespace. The blob will be pulled into
the namespace if a writer is opened with the "Expected" digest that
is already present in the backend.
The alternative mode, "isolated" requires that clients prove they have
access to the content by providing all of the content to the ingest
before the blob is added to the namespace.
Both modes share backing data, while "shared" will reduce total
bandwidth across namespaces, at the cost of allowing access to any
blob just by knowing its digest.
Note: Most functional codes and changelog of this commit originate from
Stephen J Day <stephen.day@docker.com>, see
40455aade8Fixes#1713Fixes#2865
Signed-off-by: Eric Lin <linxiulei@gmail.com>
Allow content ingests to be cleaned up during gc.
Use a default expiration on content ingests or make
use of the lease expiration when provided.
Signed-off-by: Derek McGowan <derek@mcgstyle.net>
This change allows implementations to resolve the location of the actual data
using OCI descriptor fields such as MediaType.
No OCI descriptor field is written to the store.
No change on gRPC API.
Signed-off-by: Akihiro Suda <suda.akihiro@lab.ntt.co.jp>
Allows the client to choose the context to finish the lease.
This allows the client to switch contexts when the main context
used to the create the lease may have been cancelled.
Signed-off-by: Derek McGowan <derek@mcgstyle.net>
Let the test runners choose the namespaces and
wrap the contexts. This allows the test suite to create
multiple contexts without worrying about namespacing
or leasing in the contexts.
Signed-off-by: Derek McGowan <derek@mcgstyle.net>
When a writer is requested for an object that already
exists, add that object to the provided any lease to prevent
other operations from affecting the current lease's use of
that content.
Signed-off-by: Derek McGowan <derek@mcgstyle.net>
Updates metadata plugin to require content and
snapshotter plugins be loaded and initializes with
those plugins, keeping the metadata database structure
static after initialization. Service plugins now only
require metadata plugin access snapshotter or content
stores through metadata, which was already required
behavior of the services.
Signed-off-by: Derek McGowan <derek@mcgstyle.net>
Add commit options which allow for setting labels on commit.
Prevents potential race between garbage collector reading labels
after commit and labels getting set.
Signed-off-by: Derek McGowan <derek@mcgstyle.net>
Add content test suite with test for writer.
Update fs and metadata implementations to use test suite.
Signed-off-by: Derek McGowan <derek@mcgstyle.net>
