cache image for different OS-Arch

[ghost]

Hi

I used docker/build-push-action@2 to cache my docker images in github action cache. the problem arose when I use ubuntu-latest runner. but I want to create and cache linux/arm64 image.

• name: Cache Docker layers uses: actions/cache@v2 with: path: /tmp/.buildx-cache key: ${{ runner.os }}-multi-buildx-${{ github.sha }} restore-keys: | ${{ runner.os }}-multi-buildx

• name: Build production image uses: docker/build-push-action@v2 with: context: . platform: linux/arm64 builder: ${{ steps.buildx.outputs.name }} push: true tags: ${{ steps.prep.outputs.tagged_image }} cache-to: type=local,mode=max,dest=/tmp/.buildx-cache-new

• name: Move cache run: | rm -rf /tmp/.buildx-cache mv /tmp/.buildx-cache-new /tmp/.buildx-cache

Behaviour

Steps to reproduce this issue

1. create linux/amd64 image
2. cache linux/amd64 image

Expected behaviour

1. It must create linux/arm64 image as I specified with platform property.

[crazy-max]

linux/amd65 :thinking:

[ghost]

linux/amd65 thinking

thanks, it corrected