Multiarch build with Google Cloud Build

cloudbuild.yaml

@@ -0,0 +1,56 @@
+steps:
+- id: 'docker_amd64'
+  name: 'docker'
+  entrypoint: 'sh'
+  args:
+    - '-c'
+    - |
+      docker build \
+        -t darthsim/imgproxy:$TAG_NAME-amd64 \
+        -f docker/Dockerfile \
+        --build-arg TARGET_ARCH="amd64" \
+        .
+  env:
+    - DOCKER_BUILDKIT=1
+  waitFor: ["-"]
+
+- id: 'docker_arm64'
+  name: 'docker'
+  entrypoint: 'sh'
+  args:
+    - '-c'
+    - |
+      docker run --rm --privileged multiarch/qemu-user-static --reset -p yes \
+      && docker build \
+        -t darthsim/imgproxy:$TAG_NAME-arm64 \
+        -f docker/Dockerfile \
+        --platform=arm64 \
+        --build-arg TARGET_ARCH="arm64" \
+        .
+  env:
+    - DOCKER_BUILDKIT=1
+  waitFor: ["-"]
+
+- id: 'push'
+  name: 'docker'
+  entrypoint: 'sh'
+  args:
+    - '-c'
+    - |
+      apk add --no-cache bash \
+      && docker login -u darthsim -p $$DOCKER_HUB_TOKEN \
+      && docker/push-images.sh ${TAG_NAME}
+  secretEnv: ['DOCKER_HUB_TOKEN']
+  waitFor: ['docker_amd64', 'docker_arm64']
+
+
+availableSecrets:
+  secretManager:
+    - versionName: projects/${PROJECT_ID}/secrets/DOCKER_HUB_TOKEN/versions/latest
+      env: DOCKER_HUB_TOKEN
+
+options:
+  machineType: 'N1_HIGHCPU_8'
+  dynamic_substitutions: true
+
+timeout: 1200s

docker/Dockerfile

@@ -1,15 +1,15 @@
-ARG BASE_IMAGE_VERSION="v3.0.1"
+ARG BASE_IMAGE_VERSION="v3.1.0"
+ARG TARGET_ARCH="amd64"
 
-FROM darthsim/imgproxy-base:${BASE_IMAGE_VERSION}
-LABEL maintainer="Sergey Alexandrovich <darthsim@gmail.com>"
+FROM --platform=${TARGET_ARCH} darthsim/imgproxy-base:${BASE_IMAGE_VERSION}
 
 COPY . .
-RUN go build -v -o /usr/local/bin/imgproxy
+RUN ["bash", "-c", "go build -v -o /usr/local/bin/imgproxy"]
 
 # ==================================================================================================
 # Final image
 
-FROM debian:bullseye-slim
+FROM --platform=${TARGET_ARCH} debian:bullseye-slim
 LABEL maintainer="Sergey Alexandrovich <darthsim@gmail.com>"
 
 RUN apt-get update \

docker/hooks/post_push

@@ -1,11 +0,0 @@
-#!/bin/bash
-
-re="^v([0-9]+)\.([0-9]+)\.([0-9]+)$"
-
-if [[ $DOCKER_TAG =~ $re ]]; then
-  docker tag $IMAGE_NAME "$DOCKER_REPO:v${BASH_REMATCH[1]}.${BASH_REMATCH[2]}"
-  docker push "$DOCKER_REPO:v${BASH_REMATCH[1]}.${BASH_REMATCH[2]}"
-
-  docker tag $IMAGE_NAME "$DOCKER_REPO:v${BASH_REMATCH[1]}"
-  docker push "$DOCKER_REPO:v${BASH_REMATCH[1]}"
-fi

docker/push-images.sh

@@ -0,0 +1,34 @@
+#!/bin/bash
+
+set -e
+
+TAG_NAME=${1:-latest}
+REPO_NAME="darthsim/imgproxy"
+
+IMAGE_NAME="$REPO_NAME:$TAG_NAME"
+
+echo "Image name: $IMAGE_NAME"
+
+export DOCKER_CLI_EXPERIMENTAL=enabled
+
+docker push $IMAGE_NAME-amd64
+docker push $IMAGE_NAME-arm64
+
+push_manifest() {
+  docker manifest create $1 -a $2-amd64 -a $2-arm64
+  docker manifest annotate $1 $2-amd64 --arch amd64
+  docker manifest annotate $1 $2-arm64 --arch arm64 --variant v8
+  docker manifest push $1
+}
+
+push_manifest $IMAGE_NAME $IMAGE_NAME
+
+re="^v([0-9]+)\.([0-9]+)\.([0-9]+)$"
+
+if [[ $TAG_NAME =~ $re ]]; then
+  MINOR_IMAGE_NAME="$REPO_NAME:v${BASH_REMATCH[1]}.${BASH_REMATCH[2]}"
+  push_manifest $MINOR_IMAGE_NAME $IMAGE_NAME
+
+  MAJOR_IMAGE_NAME="$REPO_NAME:v${BASH_REMATCH[1]}"
+  push_manifest $MAJOR_IMAGE_NAME $IMAGE_NAME
+fi