4ac1031e0c
Consumers of snapshot events require the snapshotter field to refer to the related snapshot. Signed-off-by: Derek McGowan <derek@mcg.dev>
109 lines
3.0 KiB
Go
109 lines
3.0 KiB
Go
/*
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Copyright The containerd Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package snapshots
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import (
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"context"
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eventstypes "github.com/containerd/containerd/api/events"
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"github.com/containerd/containerd/events"
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"github.com/containerd/containerd/metadata"
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"github.com/containerd/containerd/mount"
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"github.com/containerd/containerd/plugin"
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"github.com/containerd/containerd/services"
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"github.com/containerd/containerd/snapshots"
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)
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// snapshotter wraps snapshots.Snapshotter with proper events published.
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type snapshotter struct {
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snapshots.Snapshotter
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name string
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publisher events.Publisher
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}
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func init() {
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plugin.Register(&plugin.Registration{
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Type: plugin.ServicePlugin,
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ID: services.SnapshotsService,
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Requires: []plugin.Type{
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plugin.EventPlugin,
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plugin.MetadataPlugin,
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},
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InitFn: func(ic *plugin.InitContext) (interface{}, error) {
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m, err := ic.Get(plugin.MetadataPlugin)
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if err != nil {
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return nil, err
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}
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ep, err := ic.Get(plugin.EventPlugin)
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if err != nil {
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return nil, err
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}
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db := m.(*metadata.DB)
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ss := make(map[string]snapshots.Snapshotter)
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for n, sn := range db.Snapshotters() {
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ss[n] = newSnapshotter(sn, n, ep.(events.Publisher))
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}
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return ss, nil
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},
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})
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}
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func newSnapshotter(sn snapshots.Snapshotter, name string, publisher events.Publisher) snapshots.Snapshotter {
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return &snapshotter{
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Snapshotter: sn,
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name: name,
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publisher: publisher,
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}
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}
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func (s *snapshotter) Prepare(ctx context.Context, key, parent string, opts ...snapshots.Opt) ([]mount.Mount, error) {
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mounts, err := s.Snapshotter.Prepare(ctx, key, parent, opts...)
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if err != nil {
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return nil, err
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}
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if err := s.publisher.Publish(ctx, "/snapshot/prepare", &eventstypes.SnapshotPrepare{
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Key: key,
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Parent: parent,
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Snapshotter: s.name,
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}); err != nil {
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return nil, err
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}
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return mounts, nil
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}
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func (s *snapshotter) Commit(ctx context.Context, name, key string, opts ...snapshots.Opt) error {
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if err := s.Snapshotter.Commit(ctx, name, key, opts...); err != nil {
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return err
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}
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return s.publisher.Publish(ctx, "/snapshot/commit", &eventstypes.SnapshotCommit{
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Key: key,
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Name: name,
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Snapshotter: s.name,
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})
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}
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func (s *snapshotter) Remove(ctx context.Context, key string) error {
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if err := s.Snapshotter.Remove(ctx, key); err != nil {
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return err
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}
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return s.publisher.Publish(ctx, "/snapshot/remove", &eventstypes.SnapshotRemove{
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Key: key,
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Snapshotter: s.name,
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})
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}
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