Update docker workflow to build multiarch image. (#3350)

Author: fmassot

.github/workflows/publish_docker_images.yml

@@ -9,10 +9,19 @@ on:
       - happy-plazza
       - qw*
       - v*
+env:
+  REGISTRY_IMAGE: quickwit/quickwit
 
 jobs:
   docker:
-    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        include:
+          - os: ubuntu-latest
+            platform: linux/amd64
+          - os: buildjet-4vcpu-ubuntu-2204-arm
+            platform: linux/arm64
+    runs-on: ${{ matrix.os }}
     steps:
       - name: Checkout
         uses: actions/checkout@v3
@@ -28,7 +37,7 @@ jobs:
         uses: docker/metadata-action@v4
         with:
           images: |
-            quickwit/quickwit
+            ${{ env.REGISTRY_IMAGE }}
           tags: |
             type=edge,branch=main
             type=edge,branch=main,suffix=-bullseye
@@ -53,14 +62,59 @@ jobs:
           echo "QW_COMMIT_HASH=$(git rev-parse HEAD)" >> $GITHUB_ENV
           echo "QW_COMMIT_TAGS=$(git tag --points-at HEAD | tr '\n' ',')" >> $GITHUB_ENV
 
-      - name: Build and push
+      - name: Build and push image
         uses: docker/build-push-action@v4
+        id: build
         with:
           context: .
-          push: true
+          platforms: ${{ matrix.platform }}
           build-args: |
             QW_COMMIT_DATE=${{ env.QW_COMMIT_DATE }}
             QW_COMMIT_HASH=${{ env.QW_COMMIT_HASH }}
             QW_COMMIT_TAGS=${{ env.QW_COMMIT_TAGS }}
-          tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
+          outputs: type=image,name=${{ env.REGISTRY_IMAGE }},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@v3
+        with:
+          name: digests
+          path: /tmp/digests/*
+          if-no-files-found: error
+          retention-days: 1
+
+  merge:
+    runs-on: ubuntu-latest
+    needs: [docker]
+    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_IMAGE }}
+      - name: Login to Docker Hub
+        uses: docker/login-action@v2
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_ACCESS_TOKEN }}
+      - name: Create manifest list and push tags
+        working-directory: /tmp/digests
+        run: |
+          docker buildx imagetools create $(jq -cr '.tags | map("-t " + .) | join(" ")' <<< "$DOCKER_METADATA_OUTPUT_JSON") \
+            $(printf '${{ env.REGISTRY_IMAGE }}@sha256:%s ' *)
+      - name: Inspect image
+        run: |
+          docker buildx imagetools inspect ${{ env.REGISTRY_IMAGE }}:${{ steps.meta.outputs.version }}