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Fix directory pull image name for OCI images

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This is a breaking change and modifies the resulting image name when
pulling from an directory via `oci:...`.

Without this patch, the image names pulled via a local directory got
processed incorrectly, like this:

```
> podman pull oci:alpine
> podman images
REPOSITORY      TAG      IMAGE ID       CREATED       SIZE
localhost/oci   alpine   4fa153a82426   5 weeks ago   5.85 MB
```

We now use the same approach as in the corresponding [buildah fix][1] to
adapt the behavior for correct `localhost/` prefixing.

[1]: https://github.com/containers/buildah/pull/1800

After applying the patch the same OCI image pull looks like this:

```
> ./bin/podman pull oci:alpine
> podman images
REPOSITORY         TAG      IMAGE ID       CREATED       SIZE
localhost/alpine   latest   4fa153a82426   5 weeks ago   5.85 MB
```

End-to-end tests have been adapted as well to cover the added scenario.

Relates to: https://github.com/containers/buildah/issues/1797

Signed-off-by: Sascha Grunert <sgrunert@suse.com>
This commit is contained in:
Sascha Grunert
2019-08-19 12:06:11 +02:00
parent 438cbf4c89
commit 22f55ce406
3 changed files with 48 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

25
libpod/image/pull.go
View File

@ -13,6 +13,7 @@ import (
dockerarchive "github.com/containers/image/docker/archive"
"github.com/containers/image/docker/tarfile"
ociarchive "github.com/containers/image/oci/archive"
oci "github.com/containers/image/oci/layout"
is "github.com/containers/image/storage"
"github.com/containers/image/transports"
"github.com/containers/image/transports/alltransports"
@ -37,6 +38,9 @@ var (
DirTransport = directory.Transport.Name()
// DockerTransport is the transport for docker registries
DockerTransport = docker.Transport.Name()
// OCIDirTransport is the transport for pushing and pulling
// images to and from a directory containing an OCI image
OCIDirTransport = oci.Transport.Name()
// AtomicTransport is the transport for atomic registries
AtomicTransport = "atomic"
// DefaultTransport is a prefix that we apply to an image name
@ -189,12 +193,12 @@ func (ir *Runtime) pullGoalFromImageReference(ctx context.Context, srcRef types.
return ir.getSinglePullRefPairGoal(srcRef, dest)
case DirTransport:
path := srcRef.StringWithinTransport()
image := path
if image[:1] == "/" {
// Set localhost as the registry so docker.io isn't prepended, and the path becomes the repository
image = DefaultLocalRegistry + image
}
image := toLocalImageName(srcRef.StringWithinTransport())
return ir.getSinglePullRefPairGoal(srcRef, image)
case OCIDirTransport:
split := strings.SplitN(srcRef.StringWithinTransport(), ":", 2)
image := toLocalImageName(split[0])
return ir.getSinglePullRefPairGoal(srcRef, image)
default:
@ -202,6 +206,15 @@ func (ir *Runtime) pullGoalFromImageReference(ctx context.Context, srcRef types.
}
}
// toLocalImageName converts an image name into a 'localhost/' prefixed one
func toLocalImageName(imageName string) string {
return fmt.Sprintf(
"%s/%s",
DefaultLocalRegistry,
strings.TrimLeft(imageName, "/"),
)
}
// pullImageFromHeuristicSource pulls an image based on inputName, which is heuristically parsed and may involve configured registries.
// Use pullImageFromReference if the source is known precisely.
func (ir *Runtime) pullImageFromHeuristicSource(ctx context.Context, inputName string, writer io.Writer, authfile, signaturePolicyPath string, signingOptions SigningOptions, dockerOptions *DockerRegistryOptions, label *string) ([]string, error) {