140 lines
3.2 KiB
Go
140 lines
3.2 KiB
Go
/*
|
|
Copyright The containerd Authors.
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
package content
|
|
|
|
import (
|
|
"strings"
|
|
"time"
|
|
"unicode"
|
|
|
|
"github.com/containerd/containerd/cmd/ctr/commands"
|
|
"github.com/containerd/containerd/content"
|
|
"github.com/containerd/containerd/leases"
|
|
"github.com/containerd/containerd/log"
|
|
"github.com/sirupsen/logrus"
|
|
"github.com/urfave/cli"
|
|
)
|
|
|
|
const (
|
|
layerPrefix = "containerd.io/gc.ref.content.l."
|
|
contentPrefix = "containerd.io/gc.ref.content."
|
|
)
|
|
|
|
var pruneFlags = []cli.Flag{
|
|
cli.BoolFlag{
|
|
Name: "async",
|
|
Usage: "Allow garbage collection to cleanup asynchronously",
|
|
},
|
|
cli.BoolFlag{
|
|
Name: "dry",
|
|
Usage: "Just show updates without applying (enables debug logging)",
|
|
},
|
|
}
|
|
|
|
var pruneCommand = cli.Command{
|
|
Name: "prune",
|
|
Usage: "Prunes content from the content store",
|
|
Subcommands: cli.Commands{
|
|
pruneReferencesCommand,
|
|
},
|
|
}
|
|
|
|
var pruneReferencesCommand = cli.Command{
|
|
Name: "references",
|
|
Usage: "Prunes preference labels from the content store (layers only by default)",
|
|
Flags: pruneFlags,
|
|
Action: func(clicontext *cli.Context) error {
|
|
client, ctx, cancel, err := commands.NewClient(clicontext)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer cancel()
|
|
|
|
dryRun := clicontext.Bool("dry")
|
|
if dryRun {
|
|
log.G(ctx).Logger.SetLevel(logrus.DebugLevel)
|
|
log.G(ctx).Debug("dry run, no changes will be applied")
|
|
}
|
|
|
|
var deleteOpts []leases.DeleteOpt
|
|
if !clicontext.Bool("async") {
|
|
deleteOpts = append(deleteOpts, leases.SynchronousDelete)
|
|
}
|
|
|
|
cs := client.ContentStore()
|
|
if err := cs.Walk(ctx, func(info content.Info) error {
|
|
var fields []string
|
|
|
|
for k := range info.Labels {
|
|
if isLayerLabel(k) {
|
|
log.G(ctx).WithFields(log.Fields{
|
|
"digest": info.Digest,
|
|
"label": k,
|
|
}).Debug("Removing label")
|
|
if dryRun {
|
|
continue
|
|
}
|
|
fields = append(fields, "labels."+k)
|
|
delete(info.Labels, k)
|
|
}
|
|
}
|
|
|
|
if len(fields) == 0 {
|
|
return nil
|
|
}
|
|
|
|
_, err := cs.Update(ctx, info, fields...)
|
|
return err
|
|
}); err != nil {
|
|
return err
|
|
}
|
|
|
|
ls := client.LeasesService()
|
|
l, err := ls.Create(ctx, leases.WithRandomID(), leases.WithExpiration(time.Hour))
|
|
if err != nil {
|
|
return err
|
|
}
|
|
return ls.Delete(ctx, l, deleteOpts...)
|
|
},
|
|
}
|
|
|
|
func isLayerLabel(key string) bool {
|
|
if strings.HasPrefix(key, layerPrefix) {
|
|
return true
|
|
}
|
|
if !strings.HasPrefix(key, contentPrefix) {
|
|
return false
|
|
}
|
|
|
|
// handle legacy labels which used content prefix and index (0 always for config)
|
|
key = key[len(contentPrefix):]
|
|
if isInteger(key) && key != "0" {
|
|
return true
|
|
}
|
|
|
|
return false
|
|
}
|
|
|
|
func isInteger(key string) bool {
|
|
for _, r := range key {
|
|
if !unicode.IsDigit(r) {
|
|
return false
|
|
}
|
|
}
|
|
return true
|
|
}
|