Unify multi-arch tags

[billinghamj]

Hi,

Please could you use manifests to provide a single tag name for all supported architectures? This allows our mixed-arch k8s cluster to automatically pull the correct image for each node.

I notice some previous bits relating to this have been closed, but Docker Hub does support buildx manifests - they show it being used in their own blog post: https://www.docker.com/blog/multi-arch-build-and-images-the-simple-way/

[cosmo0920]

I notice some previous bits relating to this have been closed, but Docker Hub does support buildx manifests - they show it being used in their own blog post: https://www.docker.com/blog/multi-arch-build-and-images-the-simple-way/

Their blog post does not show that DockerHub supports docker buildx.
That blog post uses GitHub Actions to run docker buildx building not for DockerHub.

[fert-f]

To build manifest list you can use following docker commands.

docker manifest create x --amend y --amend z
docker manifest push x

It's a real lame sauce to to use Node Selector for each node type.

[mattparkes]

We're moving towards a mixed architecture platform and this would be a big help. We've done it for our internal apps and as fert-f said, it's little more than adding amd64 to your AMD64 image names (to distinguish them from the manifest) and then:

docker manifest create fluent/fluentd-kubernetes-daemonset:v1.12.0-debian-kafka2-1.0 fluent/fluentd-kubernetes-daemonset:v1.12.0-debian-kafka2-amd64-1.0 fluent/fluentd-kubernetes-daemonset:v1.12.0-debian-kafka2-arm64-1.0

docker manifest push fluent/fluentd-kubernetes-daemonset:v1.12.0-debian-kafka2-1.0

Instead we have to faff about with NodeSelectors and/or Affinity just to achieve this.

[Capitrium]

@cosmo0920 It seems like docker manifest support isn't required to create multi-arch images/manifest lists in DockerHub builds, manifest-tool can be used instead; I took a shot at implementing it in #566 so hopefully it does the trick, it would be great to simplify deployments to clusters using multiple architectures.