9c88801a12
Back in the before time, the best practices surrounding usage of Context weren't quite worked out. We defined our own type to make usage easier. As this packaged was used elsewhere, it make it more and more challenging to integrate with the forked `Context` type. Now that it is available in the standard library, we can just use that one directly. To make usage more consistent, we now use `dcontext` when referring to the distribution context package. Signed-off-by: Stephen J Day <stephen.day@docker.com>
97 lines
2.7 KiB
Go
97 lines
2.7 KiB
Go
package proxy
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import (
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"context"
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"time"
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"github.com/docker/distribution"
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dcontext "github.com/docker/distribution/context"
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"github.com/docker/distribution/reference"
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"github.com/docker/distribution/registry/proxy/scheduler"
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"github.com/opencontainers/go-digest"
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)
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// todo(richardscothern): from cache control header or config
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const repositoryTTL = time.Duration(24 * 7 * time.Hour)
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type proxyManifestStore struct {
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ctx context.Context
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localManifests distribution.ManifestService
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remoteManifests distribution.ManifestService
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repositoryName reference.Named
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scheduler *scheduler.TTLExpirationScheduler
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authChallenger authChallenger
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}
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var _ distribution.ManifestService = &proxyManifestStore{}
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func (pms proxyManifestStore) Exists(ctx context.Context, dgst digest.Digest) (bool, error) {
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exists, err := pms.localManifests.Exists(ctx, dgst)
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if err != nil {
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return false, err
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}
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if exists {
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return true, nil
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}
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if err := pms.authChallenger.tryEstablishChallenges(ctx); err != nil {
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return false, err
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}
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return pms.remoteManifests.Exists(ctx, dgst)
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}
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func (pms proxyManifestStore) Get(ctx context.Context, dgst digest.Digest, options ...distribution.ManifestServiceOption) (distribution.Manifest, error) {
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// At this point `dgst` was either specified explicitly, or returned by the
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// tagstore with the most recent association.
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var fromRemote bool
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manifest, err := pms.localManifests.Get(ctx, dgst, options...)
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if err != nil {
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if err := pms.authChallenger.tryEstablishChallenges(ctx); err != nil {
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return nil, err
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}
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manifest, err = pms.remoteManifests.Get(ctx, dgst, options...)
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if err != nil {
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return nil, err
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}
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fromRemote = true
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}
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_, payload, err := manifest.Payload()
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if err != nil {
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return nil, err
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}
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proxyMetrics.ManifestPush(uint64(len(payload)))
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if fromRemote {
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proxyMetrics.ManifestPull(uint64(len(payload)))
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_, err = pms.localManifests.Put(ctx, manifest)
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if err != nil {
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return nil, err
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}
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// Schedule the manifest blob for removal
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repoBlob, err := reference.WithDigest(pms.repositoryName, dgst)
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if err != nil {
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dcontext.GetLogger(ctx).Errorf("Error creating reference: %s", err)
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return nil, err
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}
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pms.scheduler.AddManifest(repoBlob, repositoryTTL)
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// Ensure the manifest blob is cleaned up
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//pms.scheduler.AddBlob(blobRef, repositoryTTL)
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}
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return manifest, err
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}
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func (pms proxyManifestStore) Put(ctx context.Context, manifest distribution.Manifest, options ...distribution.ManifestServiceOption) (digest.Digest, error) {
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var d digest.Digest
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return d, distribution.ErrUnsupported
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}
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func (pms proxyManifestStore) Delete(ctx context.Context, dgst digest.Digest) error {
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return distribution.ErrUnsupported
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}
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