Support building and pushing multi-platform registry image

[pkoutsovasilis]

This PR builds package-registry container image as a multi-platform one, supporting linux/amd64 and linux/arm64, by utilising docker buildx. Having such an image of package-registry will help us achieve native execution of elastic-package stack up on arm64-based machines.

PS: I am not that experienced in buildkite to make sure that buildx is always installed and available on the runner 🙂

[mrodm]

Thanks @pkoutsovasilis !

It'd be great to have this support in the docker images generated 💪 Added some suggestions and doubts .

Pinging @jsoriano to take another look on this change, in case there is something missing from my side.

[jsoriano]

LGTM, please add a changelog entry to CHANGELOG.md mentioning the new supported architectures.

I would sligthly prefer to keep the explicit retries, just in case.

I would also like to consider at some point the use of goreleaser, it also seems to support multi-platform docker images https://goreleaser.com/cookbooks/multi-platform-docker-images/
But to migrate to goreleaser we would also need to review how we generate the changelogs, so let's keep this for a separate change.

[jsoriano]

Thanks!

[elasticmachine]

💚 Build Succeeded

• Buildkite Build
• Commit: 4e5fd5f

History

• 💚 Build #554 succeeded b71a390
• 💚 Build #547 succeeded b0aff5c
• 💚 Build #546 succeeded 7bc3380
• 💚 Build #545 succeeded fc3bec1

[mrodm]

Thanks!