4.9. Building multi-architecture images

Procedure

1. Create Containerfiles for each architecture you want to support.

2. Build images for each architecture. For example:

   $ podman build --platform linux/arm64,linux/amd64 --manifest <registry>/<image> .

   • The --platform linux/arm64,linux/amd64 option specifies the target platforms for which the container image is being built.
   • The --manifest <registry>/<image> option creates a manifest list with the specified name, that is <registry>/<image>, and adds the newly-built images to them. A manifest list is a collection of image manifests, each one targeting a different architecture.

3. Push the manifest list to the registry:

   $ podman manifest push <registry>/<image>

   This manifest list acts as a single entry point for pulling the multi-architecture container.

   As a result, you can pull the appropriate container image for your platform, based on a single manifest list.

   You can also remove items from the manifest list by using the podman manifest remove <manifest_list> <digest_ID> command, where <digest_ID> is the SHA-256 checksum of the container image. For example: podman manifest remove <registry>/<image> sha256:cb8a924afdf…​.