Merge pull request #1437 from Anselmoo/feature/docker-sign

feat: 👷 Update Docker dependencies for Docker actions

Author: Anselmoo

.github/workflows/docker-cd.yml

@@ -22,75 +22,71 @@ env:
   IMAGE_NAME: ${{ github.repository }}
 
 jobs:
-  build:
+  build-image:
     runs-on: ubuntu-latest
+
     permissions:
       contents: read
       packages: write
-      # This is used to complete the identity challenge
-      # with sigstore/fulcio when running outside of PRs.
-      id-token: write
+      id-token: write # needed for signing the images with GitHub OIDC Token
 
+    name: build-image
     steps:
-      - name: Checkout repository
-        uses: actions/checkout@v4
-
-      # Install the cosign tool except on PR
-      # https://github.com/sigstore/cosign-installer
-      - name: Install cosign
-        if: github.event_name != 'pull_request'
-        uses: sigstore/cosign-installer@59acb6260d9c0ba8f4a2f9d9b48431a222b68e20 #v3.5.0
+      - uses: actions/[email protected]
         with:
-          cosign-release: "v2.1.1"
+          fetch-depth: 1
+
+      - name: Install Cosign
+        uses: sigstore/[email protected]
+
+      - name: Set up QEMU
+        uses: docker/[email protected]
 
-      # Workaround: https://github.com/docker/build-push-action/issues/461
-      - name: Setup Docker buildx
-        uses: docker/setup-buildx-action@aa33708b10e362ff993539393ff100fa93ed6a27
+      - name: Set up Docker Buildx
+        uses: docker/[email protected]
 
-      # Login against a Docker registry except on PR
-      # https://github.com/docker/login-action
-      - name: Log into registry ${{ env.REGISTRY }}
-        if: github.event_name != 'pull_request'
-        uses: docker/[email protected]
+      - name: Login to GitHub Container Registry
+        uses: docker/[email protected]
         with:
-          registry: ${{ env.REGISTRY }}
+          registry: ghcr.io
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
 
-      # Extract metadata (tags, labels) for Docker
-      # https://github.com/docker/metadata-action
-      - name: Extract Docker metadata
-        id: meta
-        uses: docker/metadata-action@60a0d343a0d8a18aedee9d34e62251f752153bdb
+      - id: docker_meta
+        uses: docker/[email protected]
         with:
-          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+          images: ghcr.io/sigstore/sample-honk
+          tags: type=sha,format=long
 
-      # Build and push Docker image with Buildx (don't push on PR)
-      # https://github.com/docker/build-push-action
-      - name: Build and push Docker image
+      - name: Build and Push container images
+        uses: docker/[email protected]
         id: build-and-push
-        uses: docker/build-push-action@5176d81f87c23d6fc96624dfdbcd9f3830bbe445
         with:
-          context: .
-          push: ${{ github.event_name != 'pull_request' }}
-          tags: ${{ steps.meta.outputs.tags }}
-          labels: ${{ steps.meta.outputs.labels }}
-          cache-from: type=gha
-          cache-to: type=gha,mode=max
-          platforms: linux/amd64,linux/arm64
-          outputs: type=image,name=target,annotation-index.org.opencontainers.image.description=${{ fromJSON(steps.meta.outputs.json).labels['org.opencontainers.image.description'] }}
+          platforms: linux/amd64,linux/arm/v7,linux/arm64
+          push: true
+          tags: ${{ steps.docker_meta.outputs.tags }}
+
+      # https://docs.github.com/en/actions/security-guides/security-hardening-for-github-actions#using-an-intermediate-environment-variable
+      - name: Sign image with a key
+        run: |
+          images=""
+          for tag in ${TAGS}; do
+            images+="${tag}@${DIGEST} "
+          done
+          cosign sign --yes --key env://COSIGN_PRIVATE_KEY ${images}
+        env:
+          TAGS: ${{ steps.docker_meta.outputs.tags }}
+          COSIGN_PRIVATE_KEY: ${{ secrets.COSIGN_PRIVATE_KEY }}
+          COSIGN_PASSWORD: ${{ secrets.COSIGN_PASSWORD }}
+          DIGEST: ${{ steps.build-and-push.outputs.digest }}
 
-      # Sign the resulting Docker image digest except on PRs.
-      # This will only write to the public Rekor transparency log when the Docker
-      # repository is public to avoid leaking data.  If you would like to publish
-      # transparency data even for private images, pass --force to cosign below.
-      # https://github.com/sigstore/cosign
-      - name: Sign the published Docker image
-        if: ${{ github.event_name != 'pull_request' }}
+      - name: Sign the images with GitHub OIDC Token
         env:
-          # https://docs.github.com/en/actions/security-guides/security-hardening-for-github-actions#using-an-intermediate-environment-variable
-          TAGS: ${{ steps.meta.outputs.tags }}
           DIGEST: ${{ steps.build-and-push.outputs.digest }}
-        # This step uses the identity token to provision an ephemeral certificate
-        # against the sigstore community Fulcio instance.
-        run: echo "${TAGS}" | xargs -I {} cosign sign --yes {}@${DIGEST}
+          TAGS: ${{ steps.docker_meta.outputs.tags }}
+        run: |
+          images=""
+          for tag in ${TAGS}; do
+            images+="${tag}@${DIGEST} "
+          done
+          cosign sign --yes ${images}