Automating multi-arch docker image builds

[rfomkin (Ruslan Fomkin)]

What is the best practice in automating multi-architecture builds?

My understanding is that the main approach to build mulit-arch images is to use the experimental feature buildx. I don’t find that it is supported in automated builds on Docker Hub, but I see examples of using buildx in GitHub Actions. Is GitHub Actions the primary way to go?

What is used for automating official images builds? I see that official images are provided for multiple architectures, so I guess they are built with buildx, right?

[johnofcamas]

Any update to this unanswered question from two years ago? I just started using Docker Hub automated builds and ran into a amd64 warning on my M1 Mac.

[rimelek (Ákos Takács)]

I share my answer here too

Is Multi Platform Build Automation possible?

You can’t build multiarch images by default on Docker Hub, but you can use build hooks to do that: Note that it says it will run your build on Amazon Linux machines which was not true in my case, but I reported this issue on Github The idea is to create a folder called “hooks”, save your hooks there and use these commands somwhere in those hooks: docker buildx create --name multiarch --use docker buildx build . -t <your_image_name> -f Dockerfile --platform linux/arm64/v8,linux/amd64 --pus…