ci(gh-actions): fix tagging docker image

[moreal]

Context

Previously, the push_docker_image workflow tagged image incorrectly, tag for only one platform (not both linux/amd64 and linux/arm64). It was because of misunderstanding for docker pull and docker tag command.

Solution

So I researched the way and I found docker buildx imagetools create command. It can create a new manifest list from manifest list with a tag. (docker manifest cannot handle manifest list 😢)

The following lines are my shell output when testing locally. Because their digests are same with the original manifest, I believe that its behavior is just retagging.

% docker buildx imagetools create --progress=plain --tag=moreal/9c-headless:333 planetariumhq/ninechronicles-headless:git-08308b1134eaaa7a593350ebe59f12021b33fae7
#1 [internal] pushing docker.io/moreal/9c-headless:333
#1 0.000 copying sha256:37972d8de505d56f856e702479e83e6e16d5141f5bc2fbaaf1cc78749555a1b3 from docker.io/planetariumhq/ninechronicles-headless:git-08308b1134eaaa7a593350ebe59f12021b33fae7 to docker.io/moreal/9c-headless:333
#1 6.780 pushing sha256:37972d8de505d56f856e702479e83e6e16d5141f5bc2fbaaf1cc78749555a1b3 to docker.io/moreal/9c-headless:333
#1 DONE 7.0s
% docker manifest inspect moreal/9c-headless:333
{
   "schemaVersion": 2,
   "mediaType": "application/vnd.oci.image.index.v1+json",
   "manifests": [
      {
         "mediaType": "application/vnd.oci.image.manifest.v1+json",
         "size": 2011,
         "digest": "sha256:7f4aafb09979d926bc3188e83aea43217987d9ab3bbe34378d9f7e53b2571e46",
         "platform": {
            "architecture": "arm64",
            "os": "linux"
         }
      },
      {
         "mediaType": "application/vnd.oci.image.manifest.v1+json",
         "size": 2011,
         "digest": "sha256:674547a00e0574a03ec91aae913a5020f80081ee3bf170f15eab426bb01b257a",
         "platform": {
            "architecture": "amd64",
            "os": "linux"
         }
      },
      {
         "mediaType": "application/vnd.oci.image.manifest.v1+json",
         "size": 567,
         "digest": "sha256:fab32ecde32f5e80d6fe83d65c8e72b26008ebd2cbfad852f76b5c4df84a7f82",
         "platform": {
            "architecture": "unknown",
            "os": "unknown"
         }
      },
      {
         "mediaType": "application/vnd.oci.image.manifest.v1+json",
         "size": 567,
         "digest": "sha256:a13ca1fd21051c3eb221d998cb795849f7a71063e42e7974d9ab33f33338a805",
         "platform": {
            "architecture": "unknown",
            "os": "unknown"
         }
      }
   ]
}
% docker manifest inspect planetariumhq/ninechronicles-headless:git-08308b1134eaaa7a593350ebe59f12021b33fae7        
{
   "schemaVersion": 2,
   "mediaType": "application/vnd.oci.image.index.v1+json",
   "manifests": [
      {
         "mediaType": "application/vnd.oci.image.manifest.v1+json",
         "size": 2011,
         "digest": "sha256:7f4aafb09979d926bc3188e83aea43217987d9ab3bbe34378d9f7e53b2571e46",
         "platform": {
            "architecture": "arm64",
            "os": "linux"
         }
      },
      {
         "mediaType": "application/vnd.oci.image.manifest.v1+json",
         "size": 2011,
         "digest": "sha256:674547a00e0574a03ec91aae913a5020f80081ee3bf170f15eab426bb01b257a",
         "platform": {
            "architecture": "amd64",
            "os": "linux"
         }
      },
      {
         "mediaType": "application/vnd.oci.image.manifest.v1+json",
         "size": 567,
         "digest": "sha256:fab32ecde32f5e80d6fe83d65c8e72b26008ebd2cbfad852f76b5c4df84a7f82",
         "platform": {
            "architecture": "unknown",
            "os": "unknown"
         }
      },
      {
         "mediaType": "application/vnd.oci.image.manifest.v1+json",
         "size": 567,
         "digest": "sha256:a13ca1fd21051c3eb221d998cb795849f7a71063e42e7974d9ab33f33338a805",
         "platform": {
            "architecture": "unknown",
            "os": "unknown"
         }
      }
   ]
}

You can see the moreal/9c-headless:333 in Docker Hub

https://hub.docker.com/layers/moreal/9c-headless/333/images/sha256-7f4aafb09979d926bc3188e83aea43217987d9ab3bbe34378d9f7e53b2571e46?context=repo

References

• https://docs.docker.com/reference/cli/docker/buildx/imagetools/create/

[sky1045]

👍