name: Create and publish a Docker image on: push: branches: ['main'] env: REGISTRY: ghcr.io IMAGE_NAME: ${{ github.repository }} jobs: build: runs-on: ubuntu-latest strategy: fail-fast: false matrix: platform: - linux/amd64 - linux/arm/v7 - linux/arm64 steps: - name: Checkout uses: actions/checkout@v3 - name: Docker meta id: meta uses: docker/metadata-action@v4 with: images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }} - name: Set up QEMU uses: docker/setup-qemu-action@v2 - name: Set up Docker Buildx uses: docker/setup-buildx-action@v2 - name: Login to Docker Hub uses: docker/login-action@v2 with: registry: ${{ env.REGISTRY }} username: ${{ github.actor }} password: ${{ secrets.GITHUB_TOKEN }} - name: Cache Docker layers uses: actions/cache@v3 with: path: /tmp/.buildx-cache key: ${{ runner.os }}-multi-buildx-${{ github.sha }} restore-keys: | ${{ runner.os }}-multi-buildx - name: Build and push by digest id: build uses: docker/build-push-action@v4 with: context: . platforms: ${{ matrix.platform }} #tags: ${{ steps.meta.outputs.tags }} labels: ${{ steps.meta.outputs.labels }} outputs: type=image,name=${{ env.REGISTRY }}/${{ env.IMAGE_NAME }},push-by-digest=true,name-canonical=true,push=true cache-from: type=local,src=/tmp/.buildx-cache # Note the mode=max here # More: https://github.com/moby/buildkit#--export-cache-options # And: https://github.com/docker/buildx#--cache-tonametypetypekeyvalue cache-to: type=local,mode=max,dest=/tmp/.buildx-cache-new - name: Export digest run: | mkdir -p /tmp/digests digest="${{ steps.build.outputs.digest }}" touch "/tmp/digests/${digest#sha256:}" - name: Upload digest uses: actions/upload-artifact@v3 with: name: digests path: /tmp/digests/* if-no-files-found: error retention-days: 1 - name: Move cache run: | rm -rf /tmp/.buildx-cache mv /tmp/.buildx-cache-new /tmp/.buildx-cache merge: runs-on: ubuntu-latest needs: - build steps: - name: Download digests uses: actions/download-artifact@v3 with: name: digests path: /tmp/digests - name: Set up Docker Buildx uses: docker/setup-buildx-action@v2 - name: Docker meta id: meta uses: docker/metadata-action@v4 with: images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }} - name: Login to Docker Hub uses: docker/login-action@v2 with: registry: ${{ env.REGISTRY }} username: ${{ github.actor }} password: ${{ secrets.GITHUB_TOKEN }} - name: Create manifest list and push working-directory: /tmp/digests run: | docker buildx imagetools create $(jq -cr '.tags | map("-t " + .) | join(" ")' <<< "$DOCKER_METADATA_OUTPUT_JSON") \ $(printf '${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}@sha256:%s ' *) - name: Inspect image run: | docker buildx imagetools inspect ${{ env.REGISTRY_IMAGE }}:${{ steps.meta.outputs.version }}