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Try to cross-repo mount until success

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Don't fallback back immediately to blob upload if the cross-repo mount
fails and layer upload is initiated by registry.

Instead cancel the upload and re-try cross-repo mount from different
source repository before doing full re-upload.

Signed-off-by: Michal Minář <miminar@redhat.com>
This commit is contained in:
Michal Minář 2016-09-16 14:05:51 +02:00
parent 0928f3f2e3
commit c6dd51c32c
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GPG key ID: ED8FF0CA0500B770
1 changed files with 15 additions and 4 deletions
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19
distribution/push_v2.go
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@ -29,7 +29,7 @@ import (
"github.com/docker/docker/registry" "github.com/docker/docker/registry"
) )
const maxRepositoryMountAttempts = 3 const maxRepositoryMountAttempts = 4
// PushResult contains the tag, manifest digest, and manifest size from the // PushResult contains the tag, manifest digest, and manifest size from the
// push. It's used to signal this information to the trust code in the client // push. It's used to signal this information to the trust code in the client
@ -379,9 +379,10 @@ func (pd *v2PushDescriptor) Upload(ctx context.Context, progressOutput progress.
pd.v2MetadataService.Remove(mountCandidate) pd.v2MetadataService.Remove(mountCandidate)
} }
layerUpload = lu if lu != nil {
if layerUpload != nil { // cancel previous upload
break cancelLayerUpload(ctx, mountCandidate.Digest, layerUpload)
layerUpload = lu
} }
} }
@ -583,3 +584,13 @@ func getPathComponents(path string) []string {
} }
return strings.Split(path, "/") return strings.Split(path, "/")
} }
func cancelLayerUpload(ctx context.Context, dgst digest.Digest, layerUpload distribution.BlobWriter) {
if layerUpload != nil {
logrus.Debugf("cancelling upload of blob %s", dgst)
err := layerUpload.Cancel(ctx)
if err != nil {
logrus.Warnf("failed to cancel upload: %v", err)
}
}
}