Multiarch

.github/workflows/build.yaml

@@ -1,4 +1,4 @@
-name: Create and publish a Docker image
+name: Create and publish multi-arch Docker images
 
 on:
   push:
@@ -10,7 +10,15 @@ env:
 
 jobs:
   build-and-push-image:
-    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        runner: [ubuntu-latest, self-hosted-arm64]
+        include:
+          - runner: ubuntu-latest
+            platform: linux/amd64
+          - runner: self-hosted-arm64
+            platform: linux/arm64
+    runs-on: ${{ matrix.runner }}
     permissions:
       contents: read
       packages: write
@@ -19,6 +27,9 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v3
 
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+
       - name: Log in to the Container registry
         uses: docker/login-action@v2
         with:
@@ -37,5 +48,15 @@ jobs:
         with:
           context: .
           push: true
+          platforms: ${{ matrix.platform }}
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+
+      - name: Merge multi-arch images
+        if: matrix.runner == 'ubuntu-latest'
+        run: |
+          docker buildx imagetools create -t ${{ steps.meta.outputs.tags }} \
+            ${{ steps.meta.outputs.tags }}:linux-amd64 \
+            ${{ steps.meta.outputs.tags }}:linux-arm64