Removes the snapshot event publishing from the snapshot service.
Adds an option to metadata db to add a publisher. Adds event
publishing to prepare, commit, and remove snapshot operations.
Adds remove snapshot event to garbage collection.
Signed-off-by: Derek McGowan <derek@mcg.dev>
Adds a registration function to metadata which allows plugins to
register resources to be garbage collected. These resources allow
defining resources types which are ephemeral and stored outside the
metadata plugin without extending it. The garbage collection of these
resources will not fail the metadata gc process if their removal fails.
These resources may be referenced by existing metadata store resources
but may not be used to reference metadata store resources for the purpose
of preventing garbage collection.
Signed-off-by: Derek McGowan <derek@mcg.dev>
megacheck, gosimple and unused has been deprecated and subsumed by
staticcheck. And staticcheck also has been upgraded. we need to update
code for the linter issue.
close: #2945
Signed-off-by: Wei Fu <fuweid89@gmail.com>
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>
Update content ingests to use content from another namespace.
Ingests must be committed to make content available and the
client will see the sharing as an ingest which has already
been fully written to, but not completed.
Updated the database version to change the ingest record in
the database from a link key to an object with a link and
expected value. This expected value is used to indicate that
the content already exists and an underlying writer may
not yet exist.
Signed-off-by: Derek McGowan <derek@mcgstyle.net>
Add garbage collection as a background process and policy
configuration for configuring when to run garbage collection.
By default garbage collection will run when deletion occurs
and no more than 20ms out of every second.
Signed-off-by: Derek McGowan <derek@mcgstyle.net>
Use single instance of content store instead of
creating new one for each collection. Using new
instance and wrapping causes failures.
Signed-off-by: Derek McGowan <derek@mcgstyle.net>
Ensures that all callers and the garbage collector are using
the same lock instances to prevent cleanup of objects
during creation.
Signed-off-by: Derek McGowan <derek@mcgstyle.net>
Marks and sweeps unreferenced objects.
Add snapshot cleanup to metadata.
Add content garbage collection
Add dirty flags for snapshotters and content store which
are set on deletion and used during the next garbage collection.
Cleanup content store backend when content metadata is removed.
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>
