forked from mirrors/docker-distribution
134 lines
3.5 KiB
Go
134 lines
3.5 KiB
Go
package storage
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import (
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"fmt"
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"github.com/docker/distribution"
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"github.com/docker/distribution/context"
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"github.com/docker/distribution/digest"
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"github.com/docker/distribution/manifest/schema2"
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"github.com/docker/distribution/reference"
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"github.com/docker/distribution/registry/storage/driver"
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)
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func emit(format string, a ...interface{}) {
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fmt.Printf(format+"\n", a...)
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}
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// MarkAndSweep performs a mark and sweep of registry data
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func MarkAndSweep(ctx context.Context, storageDriver driver.StorageDriver, registry distribution.Namespace, dryRun bool) error {
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repositoryEnumerator, ok := registry.(distribution.RepositoryEnumerator)
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if !ok {
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return fmt.Errorf("unable to convert Namespace to RepositoryEnumerator")
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}
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// mark
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markSet := make(map[digest.Digest]struct{})
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err := repositoryEnumerator.Enumerate(ctx, func(repoName string) error {
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if dryRun {
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emit(repoName)
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}
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var err error
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named, err := reference.ParseNamed(repoName)
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if err != nil {
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return fmt.Errorf("failed to parse repo name %s: %v", repoName, err)
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}
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repository, err := registry.Repository(ctx, named)
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if err != nil {
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return fmt.Errorf("failed to construct repository: %v", err)
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}
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manifestService, err := repository.Manifests(ctx)
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if err != nil {
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return fmt.Errorf("failed to construct manifest service: %v", err)
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}
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manifestEnumerator, ok := manifestService.(distribution.ManifestEnumerator)
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if !ok {
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return fmt.Errorf("unable to convert ManifestService into ManifestEnumerator")
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}
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err = manifestEnumerator.Enumerate(ctx, func(dgst digest.Digest) error {
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// Mark the manifest's blob
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if dryRun {
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emit("%s: marking manifest %s ", repoName, dgst)
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}
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markSet[dgst] = struct{}{}
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manifest, err := manifestService.Get(ctx, dgst)
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if err != nil {
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return fmt.Errorf("failed to retrieve manifest for digest %v: %v", dgst, err)
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}
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descriptors := manifest.References()
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for _, descriptor := range descriptors {
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markSet[descriptor.Digest] = struct{}{}
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if dryRun {
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emit("%s: marking blob %s", repoName, descriptor.Digest)
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}
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}
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switch manifest.(type) {
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case *schema2.DeserializedManifest:
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config := manifest.(*schema2.DeserializedManifest).Config
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if dryRun {
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emit("%s: marking configuration %s", repoName, config.Digest)
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}
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markSet[config.Digest] = struct{}{}
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break
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}
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return nil
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})
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if err != nil {
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// In certain situations such as unfinished uploads, deleting all
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// tags in S3 or removing the _manifests folder manually, this
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// error may be of type PathNotFound.
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//
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// In these cases we can continue marking other manifests safely.
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if _, ok := err.(driver.PathNotFoundError); ok {
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return nil
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}
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}
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return err
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})
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if err != nil {
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return fmt.Errorf("failed to mark: %v", err)
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}
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// sweep
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blobService := registry.Blobs()
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deleteSet := make(map[digest.Digest]struct{})
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err = blobService.Enumerate(ctx, func(dgst digest.Digest) error {
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// check if digest is in markSet. If not, delete it!
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if _, ok := markSet[dgst]; !ok {
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deleteSet[dgst] = struct{}{}
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}
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return nil
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})
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if err != nil {
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return fmt.Errorf("error enumerating blobs: %v", err)
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}
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if dryRun {
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emit("\n%d blobs marked, %d blobs eligible for deletion", len(markSet), len(deleteSet))
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}
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// Construct vacuum
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vacuum := NewVacuum(ctx, storageDriver)
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for dgst := range deleteSet {
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if dryRun {
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emit("blob eligible for deletion: %s", dgst)
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continue
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}
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err = vacuum.RemoveBlob(string(dgst))
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if err != nil {
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return fmt.Errorf("failed to delete blob %s: %v", dgst, err)
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}
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}
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return err
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}
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