Multi arch image build support

[Rajpratik71]

Description

Support to specify arch and build images for multiple arches

Proposed solution

Describe alternatives you've considered

I wanted to build a spring boot application as a container image for "arm64", I used pack cli, which built the image but only for "x86" i.e "amd64" arch.

So, I used "docker buildx" as an alternative to build multi-arch images.

Additional context

• This feature should be documented somewhere

[jjbustamante]

Hi, @Rajpratik71 thanks for creating this issue! I think they are related to #1460 and #1459

Also, recently Aidan present the following talk at Kubecon US where he actually mentioned the ideas behind the multi-architecture we want to explore. Also, will be great if you can join the ARM slack channel

[Rajpratik71]

Sure thanks @jjbustamante let me check

[jjbustamante]

I am marking this issue as in-progress because the following open RFC also we have a PR on pack to support these commands, even this is not the final solution, it is the first step to start working on the idea to support multi-arch buildings

[Jay179-sudo]

Hi! I'd like to work on this for the upcoming LFX term😀! Could you please guide me on how to get started with this issue?

[jjbustamante]

With the release of 0.34.x we included:

• Manifest commands
• Support for creating multi-platform builders and buildpacks
• New --platform flag when running pack build for users on M1 machines to be able to create amd64 and arm64 images. We are experimenting with Buildkit to see how far we can go with it.
  Supporting multi-platform buildpacks is a task on Buildpack Authors, Paketo already started publishing their buildpacks for amd64 and arm64 architecture.