ci: Add automation for building the containers

In order to use the containers in CI build
the containers regularly so everything is up
to date. Build both Dockerfiles (Fedora, Ubuntu)
that are currently available.

Signed-off-by: Ales Musil <amusil@redhat.com>
Signed-off-by: Dumitru Ceara <dceara@redhat.com>

.github/workflows/containers.yml

@@ -0,0 +1,55 @@
+name: Containers
+on:
+  # Be able to run the job manually when needed
+  workflow_dispatch:
+  # Build every week on Monday 00:00
+  schedule:
+    - cron:  '0 0 * * 1'
+
+env:
+  IMAGE_REGISTRY: ghcr.io
+  IMAGE_NAMESPACE: ovn-org
+  IMAGE_NAME: ovn-tests
+  CONTAINERS_PATH: ./utilities/containers
+  DEPENDENCIES: podman
+
+jobs:
+  container:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        distro: [ fedora, ubuntu ]
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Update APT cache
+        run: sudo apt update
+
+      - name: Install dependencies
+        run: sudo apt install -y ${{ env.DEPENDENCIES }}
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v2
+
+      - name: Build container images
+        id: build-image
+        uses: redhat-actions/buildah-build@v2
+        with:
+          image: ${{ env.IMAGE_NAME }}
+          archs: amd64, arm64
+          tags: ${{ matrix.distro }}
+          build-args: CONTAINERS_PATH=${{ env.CONTAINERS_PATH }}
+          dockerfiles: ${{ env.CONTAINERS_PATH }}/${{ matrix.distro }}/Dockerfile
+
+      - name: Push to ghcr.io
+        id: push-to-registry
+        uses: redhat-actions/push-to-registry@v2
+        with:
+          image: ${{ steps.build-image.outputs.image }}
+          tags: ${{ steps.build-image.outputs.tags }}
+          registry: ${{ env.IMAGE_REGISTRY }}/${{ env.IMAGE_NAMESPACE }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Print image url
+        run: echo "Image pushed to ${{ steps.push-to-registry.outputs.registry-paths }}"

Makefile.am

@@ -93,6 +93,7 @@ EXTRA_DIST = \
 	.ci/ovn-kubernetes/Dockerfile \
 	.ci/ovn-kubernetes/prepare.sh \
 	.ci/ovn-kubernetes/custom.patch \
+	.github/workflows/containers.yml \
 	.github/workflows/test.yml \
 	.github/workflows/ovn-kubernetes.yml \
 	boot.sh \