Multi Arch Image Build

Bazel doesn't support creating a multi-arch manifest, so we can work around
that by using a container tool to add multiple architectures to a single manifest.

Signed-off-by: Ryan Hallisey <[email protected]>

Makefile

@@ -23,6 +23,9 @@ build-functests: bazel-build-functests
 bazel-build-image-bundle:
 	hack/dockerized "export BUILD_ARCH=${BUILD_ARCH} && hack/bazel-fmt.sh && DOCKER_PREFIX=${DOCKER_PREFIX} DOCKER_TAG=${DOCKER_TAG} IMAGE_PREFIX=${IMAGE_PREFIX} hack/bazel-build-image-bundle.sh"
 
+multi-arch-build:
+	BUILD_ARCH=${BUILD_ARCH} && DOCKER_PREFIX=${DOCKER_PREFIX} DOCKER_TAG=${DOCKER_TAG} DOCKER_TAG_ALT=${DOCKER_TAG_ALT} IMAGE_PREFIX=${IMAGE_PREFIX} IMAGE_PREFIX_ALT=${IMAGE_PREFIX_ALT} ./hack/multi-arch.sh
+
 bazel-build-verify: bazel-build
 	./hack/dockerized "hack/bazel-fmt.sh"
 	./hack/verify-generate.sh
@@ -218,6 +221,7 @@ lint:
 	bazel-build \
 	bazel-build-image-bundle \
 	bazel-build-images \
+	multi-arch-build \
 	bazel-push-images \
 	bazel-test \
 	functest-image-build \

hack/multi-arch.sh

@@ -0,0 +1,26 @@
+#!/usr/bin/env bash
+
+CONTAINER_BUILD="${CONTAINER_BUILD:-docker}"
+image_list="virt-controller virt-handler virt-launcher virt-api virt-operator"
+
+function get_tag {
+    local tag
+    tag=${DOCKER_TAG}
+    # Strip trailing $arch from the tag
+    for arch in ${BUILD_ARCH//,/ }; do
+	tag=${tag%"-$arch"}
+    done
+    echo $tag
+}
+
+for image in ${image_list}; do
+    amend=""
+    for arch in ${BUILD_ARCH//,/ }; do
+	tag="$(get_tag)"
+	amend+=" --amend $DOCKER_PREFIX/$image:$tag-$arch"
+    done
+
+    cmd="$CONTAINER_BUILD manifest create $DOCKER_PREFIX/$image:$tag-multi-arch $amend"
+    echo $cmd
+    $cmd
+done