From 23c287bfc7abaf5a3f7a4c56d20b1ea357373aa3 Mon Sep 17 00:00:00 2001
From: Frederik Ring <frederik.ring@gmail.com>
Date: Thu, 1 Jul 2021 08:18:04 +0200
Subject: [PATCH] build image for arm architectures

---
 .circleci/config.yml | 56 ++++++++++++++++++++++++++++++++++----------
 Dockerfile           |  4 +++-
 Makefile             |  5 ----
 README.md            |  1 +
 4 files changed, 47 insertions(+), 19 deletions(-)
 delete mode 100644 Makefile

diff --git a/.circleci/config.yml b/.circleci/config.yml
index 7418ed1..adb36bd 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -1,40 +1,70 @@
 version: 2.1
 
 jobs:
-  build:
+  canary:
     docker:
       - image: cimg/base:2020.06
     working_directory: ~/docker-volume-backup
     steps:
       - checkout
-      - setup_remote_docker
+      - setup_remote_docker:
+          version: 20.10.6
       - run:
           name: Build
-          command: make build
-      - run:
-          name: Check if image needs to be pushed
           command: |
-            if [[ -z "$CIRCLE_TAG" ]]; then
-              echo "Not a git tag, nothing to do ..."
-              circleci-agent step halt
+            docker build . -t offen/docker-volume-backup:canary
+      - run:
+          name: Create container from image
+          command: |
+            docker run -d offen/docker-volume-backup:canary
+            echo "Sleeping for 30s before checking if container is still running."
+            sleep 30
+            count=$(docker ps -q | wc -l)
+            if [[ $count != "1" ]]; then
+              echo "Expected one container to be running, found $count."
+              exit 1
             fi
+            docker stop $(docker ps -q)
+
+  build:
+    docker:
+      - image: cimg/base:2020.06
+        environment:
+          DOCKER_BUILDKIT: '1'
+          DOCKER_CLI_EXPERIMENTAL: enabled
+    working_directory: ~/docker-volume-backup
+    steps:
+      - checkout
+      - setup_remote_docker:
+          version: 20.10.6
       - docker/install-docker-credential-helper
       - docker/configure-docker-credentials-store
       - run:
           name: Push to Docker Hub
           command: |
             echo "$DOCKER_ACCESSTOKEN" | docker login --username offen --password-stdin
-            docker tag offen/docker-volume-backup:local offen/docker-volume-backup:$CIRCLE_TAG
-            docker tag offen/docker-volume-backup:local offen/docker-volume-backup:latest
-            docker push offen/docker-volume-backup:$CIRCLE_TAG
-            docker push offen/docker-volume-backup:latest
+            # This is required for building ARM: https://gitlab.alpinelinux.org/alpine/aports/-/issues/12406
+            docker run --rm --privileged linuxkit/binfmt:v0.8
+            docker context create docker-volume-backup
+            docker buildx create docker-volume-backup --name docker-volume-backup --use
+            docker buildx inspect --bootstrap
+            docker buildx build --platform linux/arm64,linux/amd64 \
+              -t offen/docker-volume-backup:$CIRCLE_TAG \
+              -t offen/docker-volume-backup:latest \
+              . --push
 
 workflows:
   version: 2
-  deploy:
+  docker_image:
     jobs:
+      - canary:
+          filters:
+            tags:
+              ignore: /^v.*/
       - build:
           filters:
+            branches:
+              ignore: /.*/
             tags:
               only: /^v.*/
 
diff --git a/Dockerfile b/Dockerfile
index f3a949d..4223f32 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -6,9 +6,11 @@ FROM alpine:3.14
 WORKDIR /root
 
 RUN apk add --update ca-certificates docker openrc gnupg
+RUN update-ca-certificates
 RUN rc-update add docker boot
 
-RUN wget https://dl.min.io/client/mc/release/linux-amd64/mc && \
+ARG TARGETARCH=amd64
+RUN wget https://dl.min.io/client/mc/release/linux-$TARGETARCH/mc && \
   chmod +x mc && \
   mv mc /usr/bin/mc
 
diff --git a/Makefile b/Makefile
deleted file mode 100644
index a00b636..0000000
--- a/Makefile
+++ /dev/null
@@ -1,5 +0,0 @@
-DOCKER_TAG ?= local
-
-.PHONY: build
-build:
-	@docker build -t offen/docker-volume-backup:$(DOCKER_TAG) .
diff --git a/README.md b/README.md
index 1ee116c..d6d1c5e 100644
--- a/README.md
+++ b/README.md
@@ -114,3 +114,4 @@ This image is heavily inspired by the `futurice/docker-volume-backup`. We decide
 - This image makes use of the MinIO client `mc` instead of the full blown AWS CLI for uploading backups.
 - The original image proposed to handle backup rotation through AWS S3 lifecycle policies. This image adds the option to rotate old backups through the same script so this functionality can also be offered for non-AWS storage backends like MinIO.
 - InfluxDB specific functionality was removed.
+- `arm64` Architecture is supported.