run separately on amd64 and arm64

Author: rela-v

.github/workflows/docker-publish.yml

@@ -3,51 +3,68 @@ name: Build and Push to Docker Hub
 on:
   push:
     branches: [ "main" ]
-  pull_request:
-    branches: [ "main" ]
 
 jobs:
-  build-and-push:
-    runs-on: ubuntu-latest
+  build:
+    runs-on: ${{ matrix.arch == 'amd64' && 'ubuntu-latest' || 'ubuntu-24.04-arm64' }}
+    strategy:
+      matrix:
+        arch: [amd64, arm64]
+    
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
 
-      # 1. Set up QEMU (Required for multi-platform builds)
-      - name: Set up QEMU
-        uses: docker/setup-qemu-action@v3
-
-      # 2. Set up Docker Buildx
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
 
-      # 3. Login to Docker Hub
       - name: Login to Docker Hub
         uses: docker/login-action@v3
         with:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_API_KEY }}
 
-      # 4. Extract metadata
-      - name: Extract metadata
-        id: meta
-        uses: docker/metadata-action@v5
-        with:
-          images: cdrl/3podr_container
-          tags: |
-            type=ref,event=branch
-            type=sha,format=short
-            latest
-
-      # 5. Build and Push with Multi-Platform Support
-      - name: Build and push
-        uses: docker/build-push-action@v5
+      - name: Build and push by digest
+        id: build
+        uses: docker/build-push-action@v6
         with:
           context: .
-          push: true
-          # This creates a "Manifest List" containing both versions
-          platforms: linux/amd64, linux/arm64
-          tags: ${{ steps.meta.outputs.tags }}
-          labels: ${{ steps.meta.outputs.labels }}
-          cache-from: type=gha
-          cache-to: type=gha,mode=max
+          platforms: linux/${{ matrix.arch }}
+          outputs: type=image,name=cdrl/3podr_container,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-${{ matrix.arch }}
+          path: /tmp/digests/*
+          if-no-files-found: error
+          retention-days: 1
+
+  merge:
+    runs-on: ubuntu-latest
+    needs: build
+    steps:
+      - name: Download digests
+        uses: actions/download-artifact@v4
+        with:
+          path: /tmp/digests
+          pattern: digests-*
+          merge-multiple: true
+
+      - name: Login to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_API_KEY }}
+
+      - name: Create manifest list and push
+        working-directory: /tmp/digests
+        run: |
+          docker buildx imagetools create -t cdrl/3podr_container:latest \
+            $(printf 'cdrl/3podr_container@sha256:%s ' *)