Problems building for multiple plattforms

[gltched-usr]

My workflow:

name: Build and Release

on:
  workflow_dispatch:
    inputs:
      tag:
        description: "Tag for the release"
        required: true
        default: "latest"
      release_description:
        description: "Description for the release"
        required: true
        default: "Automated release"

permissions:
  contents: write
  packages: write

jobs:
  build-and-push:
    runs-on: ubuntu-latest
    strategy:
      matrix:
        architecture:
          - linux/amd64
          - linux/arm64

    steps:
      - name: 🔡 Prepare env
        id: prepareEnv
        run: |
          echo "REPO_NAME=$(echo ${{ github.repository }} | tr '[:upper:]' '[:lower:]')" >> $GITHUB_ENV
          platform=${{ matrix.architecture }}
          echo "PLATFORM_PAIR=${platform//\//-}" >> $GITHUB_ENV

      - name: 🐳 Docker Meta
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.REPO_NAME }}

      - name: 📥 Check out the repository
        uses: actions/checkout@v4

      - name: 🔑 Log in to GitHub Container Registry
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: 🔍 Verify Dockerfile exists
        run: test -f Dockerfile

      - name: 🔧 Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

      - name: 📦 Build and push by digest
        id: build
        uses: docker/build-push-action@v6
        with:
          platforms: ${{ matrix.architecture }}
          context: .
          push: true
          labels: ${{ steps.meta.outputs.labels }}
          outputs: type=image,name=ghcr.io/${{ env.REPO_NAME }},push-by-digest=true,name-canonical=true,push=true

      - name: 📜 Export digest
        run: |
          mkdir -p /tmp/digests
          digest="${{ steps.build.outputs.digest }}"
          touch "/tmp/digests/${digest#sha256:}"

      - name: 📤 Upload digest
        uses: actions/upload-artifact@v4
        with:
          name: digests-${{ env.PLATFORM_PAIR }}
          path: /tmp/digests/*
          if-no-files-found: error
          retention-days: 1

  merge:
    runs-on: ubuntu-latest
    needs:
      - build-and-push
    steps:
      - name: 🔡 Prepare env
        id: prepareEnv
        run: |
          echo "REPO_NAME=$(echo ${{ github.repository }} | tr '[:upper:]' '[:lower:]')" >> $GITHUB_ENV
          platform=${{ matrix.architecture }}
          echo "PLATFORM_PAIR=${platform//\//-}" >> $GITHUB_ENV

      - name: 📥 Download digests
        uses: actions/download-artifact@v4
        with:
          path: /tmp/digests
          pattern: digests-*
          merge-multiple: true

      - name: 🔧 Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

      - name: 🔑 Log in to GitHub Container Registry
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: 📦 Create manifest list and push
        working-directory: /tmp/digests
        run: |
          docker buildx imagetools create \
            -t ghcr.io/${{ env.REPO_NAME }}:${{ github.event.inputs.tag }} \
            -t ghcr.io/${{ env.REPO_NAME }}:latest \
            $(printf 'ghcr.io/${{ env.REPO_NAME }}@sha256:%s ' *)

      - name: 🔍 Inspect image
        run: |
          docker buildx imagetools inspect ghcr.io/${{ env.REPO_NAME }}:${{ github.event.inputs.tag }}
          docker buildx imagetools inspect ghcr.io/${{ env.REPO_NAME }}:latest

But on ghcr I find arch linux/amd64 and unknown/unkonw

[thompson-shaun]

Hello @gltched-usr. Assuming the tags can be found in ghcr you might be running into a known issue where the manifest attestation is being parsed and displayed a little wonky.

Are the desired architectures there?

[gltched-usr]

Hey @thompson-shaun, thanks for the reply.

Before I switch to use matrix I had
linux/amd64, linux/arm64, unkown/unkown, now I have linux/amd64, unkown/unkown

So its missing the arm64 arch

[thompson-shaun]

Transferred to docker/build-push-action repository.

I'd suspect that something is suspect with the manifest merge. This appears to be following the multiple runner documentation.

Any chance you could link to a workflow run or perhaps upload logs?