Build arm64 docker image in CI (#1099)

.circleci/config.yml

@@ -3,6 +3,14 @@
 # Check https://circleci.com/docs/2.0/language-clojure/ for more details
 #
 version: 2.1
+commands:
+  setup-docker-buildx:
+    steps:
+      - run:
+          name: Create multi-platform capabale buildx builder
+          command: |
+            docker run --privileged --rm tonistiigi/binfmt --install all
+            docker buildx create --name ci-builder --use
 jobs:
   jvm:
     docker:
@@ -35,10 +43,6 @@ jobs:
             export BABASHKA_FEATURE_POSTGRESQL=true
             script/test
             script/run_lib_tests
-      # - run:
-      #     name: Run as tools.deps dependency
-      #     command: |
-      #       .circleci/script/tools.deps
       - run:
           name: Run as lein command
           command: |
@@ -229,14 +233,6 @@ jobs:
           command: |
             git submodule init
             git submodule update
-      - run:
-          name: "Short circuit on SNAPSHOT"
-          command: |
-            VERSION=$(cat resources/BABASHKA_VERSION)
-            if [[ "$VERSION" == *-SNAPSHOT ]]
-            then
-              circleci task halt
-            fi
       - run:
           name: Install Clojure
           command: |
@@ -449,16 +445,17 @@ jobs:
             - ~/.m2
           key: v1-dependencies-{{ checksum "project.clj" }}
   docker:
-    docker:
-      - image: circleci/buildpack-deps:bullseye
+    machine:
+      image: ubuntu-2004:202111-01
     steps:
       - checkout
+      - setup-docker-buildx
       - attach_workspace:
           at: /tmp
-      - setup_remote_docker:
-          version: 19.03.12
       - run:
           name: Build Docker image
+          environment:
+            PLATFORM: linux/amd64,linux/arm64
           command: .circleci/script/docker
 
 workflows:
@@ -482,7 +479,9 @@ workflows:
       - docker:
           filters:
             branches:
-              only: master
+              only: 
+                - master
           requires:
             - linux
             - linux-static
+            - linux-aarch64

.circleci/script/docker

@@ -4,6 +4,7 @@ set -eo pipefail
 
 image_name="babashka/babashka"
 image_tag=$(cat resources/BABASHKA_VERSION)
+platform=${PLATFORM:-"linux/amd64"}
 latest_tag="latest"
 
 if [[ $image_tag =~ SNAPSHOT$ ]]; then
@@ -15,29 +16,36 @@ else
 fi
 
 if [ -z "$CIRCLE_PULL_REQUEST" ] && [ "$CIRCLE_BRANCH" = "master" ]; then
-    echo "Building Docker image $image_name:$image_tag"
+    echo "Building & pushing $platform Docker image(s) $image_name:$image_tag"
     echo "$DOCKERHUB_PASS" | docker login -u "$DOCKERHUB_USER" --password-stdin
-    tar zxvf  "/tmp/release/babashka-${image_tag}-linux-amd64.tar.gz"
-    docker build -t "$image_name" -f Dockerfile.ci .
-    docker tag "$image_name:$latest_tag" "$image_name:$image_tag"
-    rm -f bb
+    IFS=',' read -r -a platforms <<< "$platform"
+    for p in "${platforms[@]}"; do
+        tarball_platform=${p//\//-}
+        if [[ $tarball_platform == "linux-arm64" ]]; then tarball_platform="linux-aarch64"; fi
+        mkdir -p $p
+        tar zxvf "/tmp/release/babashka-${image_tag}-${tarball_platform}.tar.gz" -C $p
+    done
+    docker buildx build -t "$image_name:$image_tag" --platform "$platform" --push -f Dockerfile.ci .
     if [[ $snapshot == "false" ]]; then
-        tar zxvf  "/tmp/release/babashka-${image_tag}-linux-amd64-static.tar.gz"
-        docker build -t "$image_name:alpine" -f Dockerfile.alpine .
-        docker tag "$image_name:alpine" "$image_name:$image_tag-alpine"
+        echo "Building & pushing $platform Docker image(s) $image_name:$latest_tag"
+        docker buildx build -t "$image_name:$latest_tag" --platform "$platform" --push -f Dockerfile.ci .
     fi
-    # we only update latest when it's not a SNAPSHOT version
-    if [ "false" = "$snapshot" ]; then
-        echo "Pushing image $image_name:$latest_tag"
-        docker push "$image_name:$latest_tag"
+    for p in "${platforms[@]}"; do
+        rm -rf $p
+    done
+
+    # alpine doesn't provide upstream arm64 images yet
+    if [[ $platform == "linux-amd64" ]]; then
+        tar zxvf  "/tmp/release/babashka-${image_tag}-${platform}-static.tar.gz"
+        docker build -t "$image_name:alpine" -f Dockerfile.alpine .
+        rm -f bb
+        docker tag "$image_name:alpine" "$image_name:$image_tag-alpine"
+        echo "Pushing image $image_name:$image_tag-alpine"
+        docker push "$image_name:$image_tag-alpine"
+        if [[ $snapshot == "false" ]]; then
             echo "Pushing image $image_name:alpine"
             docker push "$image_name:alpine"
         fi
-    # we update the version tag, even if it's a SNAPSHOT version
-    echo "Pushing image $image_name:$image_tag"
-    docker push "$image_name:$image_tag"
-    if [[ $snapshot == "false" ]]; then
-        docker push "$image_name:$image_tag-alpine"
     fi
 else
     echo "Not publishing Docker image"

Dockerfile.ci

@@ -4,7 +4,10 @@ RUN apt-get update \
     && apt-get install -y curl \
     && mkdir -p /usr/local/bin
 
-COPY bb /usr/local/bin/bb
+ARG TARGETARCH
+ARG TARGETOS
+
+COPY ${TARGETOS}/${TARGETARCH}/bb /usr/local/bin/bb
 
 RUN chmod +x /usr/local/bin/bb