docker.io/rabbitmq:3-management-alpine container image list cannot be imported into quay.io

[mh21]

Describe the bug

Copying the docker.io/rabbitmq:3-management-alpine container image list to quay.io via skopeo copy --all worked up to Jul 31, 2023, when it started to fail with application/vnd.oci.image.index.v1+json(uploading manifest 3-management-alpine to [quay.io/cki/mirror_rabbitmq](http://quay.io/cki/mirror_rabbitmq): manifest invalid), application/vnd.docker.distribution.manifest.list.v2+json(uploading manifest 3-management-alpine to [quay.io/cki/mirror_rabbitmq](http://quay.io/cki/mirror_rabbitmq): manifest invalid).

Starting this date, the image list manifest changed to application/vnd.oci.image.index.v1+json. Discussing this with the quay.io folks, they were pointing at one of the referenced manifests having the mediaType of application/vnd.docker.distribution.manifest.v2+json as the most likely reason.

With this, it was possible to workaround this via the --format oci parameter of skopeo which converts the manifest above to application/vnd.oci.image.manifest.v1+json which makes the copy to go through.

Reproduction steps

1. get a quay.io account
2. skopeo login quay.io
3. on e.g. a recent Fedora container, run
4. skopeo copy --all docker://docker.io/rabbitmq:3-management-alpine docker://quay.io/foo/bar:baz

Expected behavior

container image list can be copied to quay.io successfully

Additional context

No response

[michaelklishin]

The image is maintained by a different group of folks.

[lukebakken]

@mh21 please start a discussion here, don't just blindly assume this is a bug:

https://github.com/docker-library/rabbitmq/discussions