How to publish a multi-arch Docker manifest to ECR with aws-ecr-push-image in one Bitbucket step?

[Victor Micó Biosca]

Hi everyone,

We are using Bitbucket Cloud Pipelines and the pipe atlassian/aws-ecr-push-image:2.6.0 to push Docker images to ECR.

Our use case:

• CI runner is amd64
• Production edge devices are arm64
• We want to publish one single tag that contains a multi-architecture manifest, so Docker pull resolves automatically by platform

Current limitation we see:

• aws-ecr-push-image pushes a single image/tag, but does not seem to support creating/pushing a multi-arch manifest list in one step

Today we are using a workaround with docker buildx before the pipe, and then pushing architecture-specific tags, but we would like native support directly in the pipe.

Questions:

1. Is multi-architecture manifest push currently supported by aws-ecr-push-image?
2. If not, is there a recommended Atlassian-supported pattern to keep using the pipe and still publish one multi-arch tag?
3. Is this feature on the roadmap?

Thanks!