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Make sure tags and digests don’t collide

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Tags and digests are kept in the same storage. We want to make sure that they are completely separated - tags are something users set and digests can only be set by pull-by-digest code path.

Reverts #14664

Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>
This commit is contained in:
Tonis Tiigi 2015-09-14 09:20:11 -08:00
parent eebf88ffd3
commit d08ca5c2b6
3 changed files with 26 additions and 8 deletions
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6
graph/export.go
View file

@ -10,6 +10,7 @@ import (
"time"
"github.com/Sirupsen/logrus"
"github.com/docker/distribution/digest"
"github.com/docker/docker/pkg/archive"
"github.com/docker/docker/pkg/parsers"
"github.com/docker/docker/registry"
@ -59,6 +60,11 @@ func (s *TagStore) ImageExport(names []string, outStream io.Writer) error {
// This is a named image like 'busybox:latest'
repoName, repoTag := parsers.ParseRepositoryTag(name)
// Skip digests on save
if _, err := digest.ParseDigest(repoTag); err == nil {
repoTag = ""
}
// check this length, because a lookup of a truncated has will not have a tag
// and will not need to be added to this map
if len(repoTag) > 0 {

7
graph/tags.go
View file

@ -277,15 +277,8 @@ func (store *TagStore) setLoad(repoName, tag, imageName string, force bool, out
return err
}
if err := tags.ValidateTagName(tag); err != nil {
if _, formatError := err.(tags.ErrTagInvalidFormat); !formatError {
return err
}
if _, dErr := digest.ParseDigest(tag); dErr != nil {
// Still return the tag validation error.
// It's more likely to be a user generated issue.
return err
}
}
if err := store.reload(); err != nil {
return err
}

19
integration-cli/docker_cli_tag_test.go
View file

@ -152,3 +152,22 @@ func (s *DockerSuite) TestTagOfficialNames(c *check.C) {
deleteImages("fooo/bar:latest")
}
}
// ensure tags can not match digests
func (s *DockerSuite) TestTagMatchesDigest(c *check.C) {
testRequires(c, DaemonIsLinux)
if err := pullImageIfNotExist("busybox:latest"); err != nil {
c.Fatal("couldn't find the busybox:latest image locally and failed to pull it")
}
digest := "busybox@sha256:abcdef76720241213f5303bda7704ec4c2ef75613173910a56fb1b6e20251507"
// test setting tag fails
_, _, err := dockerCmdWithError("tag", "-f", "busybox:latest", digest)
if err == nil {
c.Fatal("digest tag a name should have failed")
}
// check that no new image matches the digest
_, _, err = dockerCmdWithError("inspect", digest)
if err == nil {
c.Fatal("inspecting by digest should have failed")
}
}