Merge pull request #1199 from alphagov/dj-maisy/multi-arch-update

Add Multi-arch reusable workflow

.github/workflows/build-and-push-multiarch-image.yaml

@@ -0,0 +1,178 @@
+name: Build and push multi-arch image
+
+on:
+  workflow_call:
+    inputs:
+      ecrRepositoryName:
+        required: false
+        type: string
+        default: ${{ github.event.repository.name }}
+      dockerfilePath:
+        required: false
+        type: string
+        default: Dockerfile
+      buildArgs:
+        required: false
+        type: string
+      gitRef:
+        required: false
+        type: string
+        default: ${{ github.sha }}
+    outputs:
+      imageTag:
+        description: "The image tag for the built image"
+        value: ${{ jobs.build-and-push-image.outputs.imageTag }}
+
+jobs:
+  build-and-push-image:
+    name: Build and push image for ${{ inputs.ecrRepositoryName }}
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        arch:
+          - amd64
+          - arm64
+    outputs:
+      imageTag: ${{ steps.meta.outputs.version }}
+    permissions:
+      id-token: write
+      contents: read
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          ref: ${{ inputs.gitRef }}
+          show-progress: false
+
+      - name: Configure AWS credentials
+        uses: aws-actions/configure-aws-credentials@v4.0.1
+        with:
+          role-to-assume: "arn:aws:iam::172025368201:role/github_action_ecr_push"
+          aws-region: eu-west-1
+          role-session-name: ecr-push
+
+      - name: Login to Amazon ECR
+        id: login-ecr
+        uses: aws-actions/amazon-ecr-login@v2
+        with:
+          mask-password: 'true'
+
+      - name: Set up QEMU for ${{ matrix.arch }} build
+        if: ${{ matrix.arch != 'amd64' }}
+        uses: docker/setup-qemu-action@v3
+        with:
+          platforms: ${{ matrix.arch }}
+
+      - uses: docker/setup-buildx-action@v3
+
+      - name: Calculate Image Tags
+        id: calculate-image-tags
+        run: |
+          CREATED_DATE="$(date -u +'%Y-%m-%dT%H:%M:%SZ')"
+          echo "createdDate=${CREATED_DATE}" >> $GITHUB_OUTPUT
+          echo "sha=$(git rev-parse HEAD)" >> $GITHUB_OUTPUT
+
+      - name: Generate Image Metadata
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: |
+            ${{ steps.login-ecr.outputs.registry }}/${{ inputs.ecrRepositoryName }}
+          labels: |
+            org.opencontainers.image.vendor=GDS
+            org.opencontainers.image.created=${{ steps.calculate-image-tags.outputs.createdDate }}
+          tags: |
+            type=raw,priority=500,value=${{ inputs.gitRef }},enable=${{ startsWith(inputs.gitRef, 'v') }}
+            type=raw,priority=400,value=${{ steps.calculate-image-tags.outputs.sha }},enable=${{ !startsWith(inputs.gitRef, 'v') }}
+            type=sha,enable=true,format=short
+            type=sha,enable=true,priority=100,format=long
+
+      - id: build-image
+        uses: docker/build-push-action@v5
+        with:
+          file: ${{ inputs.dockerfilepath }}
+          context: .
+          platforms: "linux/${{ matrix.arch }}"
+          load: true
+          provenance: false
+          build-args: ${{ inputs.buildArgs }}
+          labels: ${{ steps.meta.outputs.labels }}
+          outputs: type=image,name=${{ steps.login-ecr.outputs.registry }}/${{ inputs.ecrRepositoryName }},push-by-digest=true,name-canonical=true,push=true
+          cache-from: type=gha,scope=build-${{ matrix.arch}}
+          cache-to: type=gha,scope=build-${{ matrix.arch}},mode=max
+
+      - id: export-digests
+        run: |
+          mkdir -p /tmp/digests
+          digest="${{steps.build-image.outputs.digest }}"
+          touch "/tmp/digests/${baseDigest#sha256:}"
+
+      - id: upload-digests
+        uses: actions/upload-artifact@v4
+        with:
+          name: digests-${{ matrix.arch }}
+          path: /tmp/digests/*
+          if-no-files-found: error
+          retention-days: 1
+          overwrite: true
+
+  combine_manifests:
+    name: Create Docker Manifests for Built Images
+    needs:
+      - build-and-push-image
+    runs-on: ubuntu-latest
+    permissions:
+      id-token: write
+      contents: read
+    steps:
+      - name: Download Digests
+        uses: actions/download-artifact@v4
+        with:
+          path: /tmp/digests
+          pattern: digests-*
+          merge-multiple: true
+
+      - uses: docker/setup-buildx-action@v3
+
+      - name: Calculate Image Tags
+        id: calculate-image-tags
+        run: |
+          CREATED_DATE="$(date -u +'%Y-%m-%dT%H:%M:%SZ')"
+          echo "createdDate=${CREATED_DATE}" >> $GITHUB_OUTPUT
+
+      - name: Configure AWS credentials
+        uses: aws-actions/configure-aws-credentials@v4.0.1
+        with:
+          role-to-assume: "arn:aws:iam::172025368201:role/github_action_ecr_push"
+          aws-region: eu-west-1
+          role-session-name: ecr-push
+
+      - name: Login to Amazon ECR
+        id: login-ecr
+        uses: aws-actions/amazon-ecr-login@v2
+        with:
+          mask-password: 'true'
+
+      - name: Generate Image Metadata
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: |
+            ${{ steps.login-ecr.outputs.registry }}/${{ inputs.ecrRepositoryName }}
+          labels: |
+            org.opencontainers.image.vendor=GDS
+            org.opencontainers.image.created=${{ steps.calculate-image-tags.outputs.createdDate }}
+          tags: |
+            type=raw,priority=500,value=${{ inputs.gitRef }},enable=${{ startsWith(inputs.gitRef, 'v') }}
+            type=raw,priority=400,value=${{ steps.calculate-image-tags.outputs.sha }},enable=${{ !startsWith(inputs.gitRef, 'v') }}
+            type=sha,enable=true,format=short
+            type=sha,enable=true,priority=100,format=long
+
+      - name: Create Manifest Lists
+        working-directory: /tmp/digests
+        run: |
+          docker buildx imagetools create $(jq -cr '.tags | map("-t " + .) | join(" ")' <<< "$DOCKER_METADATA_OUTPUT_JSON") \
+            $(printf '${{ steps.login-ecr.outputs.registry }}/${{ inputs.ecrRepositoryName }}@sha256:%s ' *)  
+
+      - name: Inspect Images
+        run: |
+          docker buildx imagetools inspect ${{ steps.login-ecr.outputs.registry }}/${{ inputs.ecrRepositoryName }}:${{ steps.meta.outputs.version }}