build arm64 distro images (#1264)

* build arm64 distro images

.github/workflows/distros.yaml

@@ -12,19 +12,50 @@ concurrency:
   cancel-in-progress: true
 
 jobs:
+  list-distros:
+    runs-on: ubuntu-latest
+    outputs:
+      distros: ${{ steps.list-distros.outputs.distros }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: List distros
+        id: list-distros
+        run: |
+          cd dev/distros
+          distros=$(make list | jq -Rsc 'split("\n") | map(select(length > 0))')
+          echo "distros=$distros" >> $GITHUB_OUTPUT
+
   build-and-push:
     runs-on: ubuntu-latest
+    needs: list-distros
+    strategy:
+      fail-fast: false
+      matrix:
+        distro: ${{ fromJson(needs.list-distros.outputs.distros) }}
     steps:
       - name: Checkout
         uses: actions/checkout@v4
 
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
       - name: Login to DockerHub
         uses: docker/login-action@v3
         with:
           username: ${{ secrets.DOCKERHUB_USER }}
           password: ${{ secrets.DOCKERHUB_PASSWORD }}
 
       - name: Build and push
-        run: |
-          cd dev/distros
-          make list | xargs -I {} make build-and-push-{}
+        uses: docker/build-push-action@v6
+        with:
+          push: true
+          tags: |
+            replicated/ec-distro:${{ matrix.distro }}
+          platforms: linux/amd64,linux/arm64
+          file: dev/distros/dockerfiles/${{ matrix.distro }}.Dockerfile
+          context: dev/distros

dev/distros/Makefile

@@ -4,11 +4,6 @@ SHELL := /bin/bash
 list:
 	@ls dockerfiles/*.Dockerfile | sed 's/^dockerfiles\///' | sed 's/\.Dockerfile$$//'
 
-.PHONY: build-and-push-%
-build-and-push-%:
-	@$(MAKE) build-$*
-	docker push replicated/ec-distro:$*
-
 .PHONY: build-%
 build-%:
 	docker build -t replicated/ec-distro:$* -f dockerfiles/$*.Dockerfile .