Media type for `python:3.10-slim-bookworm` changed to `"application/vnd.oci.image.index.v1+json"`

[ahpd]

In the past week or so the media type for python:3.10-slim-bookworm has changed to "application/vnd.oci.image.index.v1+json". I believe it used to be "application/vnd.docker.distribution.manifest.list.v2+json" which is what the base image debian:bookworm-slim shows:

➜ docker manifest inspect debian:bookworm-slim | head                             
{
   "schemaVersion": 2,
   "mediaType": "application/vnd.docker.distribution.manifest.list.v2+json",
   "manifests": [
      {
         "mediaType": "application/vnd.docker.distribution.manifest.v2+json",
         "size": 529,
         "digest": "sha256:39868a6f452462b70cf720a8daff250c63e7342970e749059c105bf7c1e8eeaf",
         "platform": {
            "architecture": "amd64",

➜ docker manifest inspect python:3.10-slim-bookworm | head
{
   "schemaVersion": 2,
   "mediaType": "application/vnd.oci.image.index.v1+json",
   "manifests": [
      {
         "mediaType": "application/vnd.oci.image.manifest.v1+json",
         "size": 1944,
         "digest": "sha256:8244f266195f442379acd0e7d8918b1ef3967050ebf49c40291e89d0a1ba8f94",
         "platform": {
            "architecture": "amd64",

Is this intended and if so what was the reason for changing the media types? We currently have several Vertex AI pipelines that use the Python images which are failing due to this issue

{
	"errors": [{
		"code": "MANIFEST_UNKNOWN",
		"message": "Manifest has media type \"application/vnd.oci.image.manifest.v1+json\" but client accepts [\"application/vnd.docker.distribution.manifest.v2+json,application/vnd.docker.distribution.manifest.v1+json,application/vnd.docker.distribution.manifest.v1+prettyjws\"]"
	}]
}

Thank you.

[jonjohnsonjr]

I'd file an issue against Google.

[yosifkit]

Yes, this was intentional. We are in a slow, but active process of migrating all of Official Images builds from the classic docker build to the docker build backed by buildkit. Python is one that was added recently. Many of the images in Docker Official Images are now built using buildkit and use these "newer" oci media types; eventually all of them will be.

More about the OCI: https://opencontainers.org/

[ahpd]

Got it, thank you for the explanation.