Cloud Native Buildpacks - MultiArch Support

Problem

Currently pack can only build images for the same architecture as the host system.

Goal

Provide option for cross compiling to different architectures and OS’es in pack CLI

Understanding

• What are Cloud Native Buildpacks?
  • Dockerfiles vs CNBs https://tanzu.vmware.com/developer/blog/understanding-the-differences-between-dockerfile-and-cloud-native-buildpacks/
  • CNBs are readymade, rigorous, battle-tested Dockerfiles that you can include in your projects instead of making ones yourself. Saves time, improves security, at the cost of flexibility like with anything pre-made. Think pre-built PCs vs Custom PCs
• How is pack related to CNBs?
  • A CLI tool to use CNBs
• https://tanzu.vmware.com/developer/guides/cnb-what-is/

  

pack steps

1. Spin up container of builder img
2. Mount application source code on top of it
3. Invoke the steps binary present in the builder container which starts the Buildpack Lifecycle

The Buildpack Lifecycle