From 9f5447bf4651c9e2e4af44c75307eb504d4dc059 Mon Sep 17 00:00:00 2001
From: Simon Pasquier <spasquie@redhat.com>
Date: Tue, 16 Apr 2019 14:41:18 +0200
Subject: [PATCH] Build container images for ARM32v7 and ARM64v8

Signed-off-by: Simon Pasquier <spasquie@redhat.com>
---
 .circleci/config.yml | 24 ++++++++++++++++--------
 Dockerfile           | 12 ++++++++----
 Makefile             |  3 +++
 3 files changed, 27 insertions(+), 12 deletions(-)

diff --git a/.circleci/config.yml b/.circleci/config.yml
index ba2bde21..fb1f7935 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -85,11 +85,11 @@ jobs:
     - image: circleci/golang
     steps:
     - checkout
-    - setup_remote_docker
+    - setup_remote_docker:
+        version: 18.06.0-ce
+    - run: docker run --privileged linuxkit/binfmt:v0.6
     - attach_workspace:
         at: .
-    - run: ln -s .build/linux-amd64/alertmanager alertmanager
-    - run: ln -s .build/linux-amd64/amtool amtool
     - run: make docker
     - run: make docker DOCKER_REPO=quay.io/prometheus
     - run: docker images
@@ -97,13 +97,17 @@ jobs:
     - run: docker login -u $QUAY_LOGIN -p $QUAY_PASSWORD quay.io
     - run: make docker-publish
     - run: make docker-publish DOCKER_REPO=quay.io/prometheus
+    - run: make docker-manifest
+    - run: make docker-manifest DOCKER_REPO=quay.io/prometheus
 
   docker_hub_release_tags:
     docker:
     - image: circleci/golang
     steps:
     - checkout
-    - setup_remote_docker
+    - setup_remote_docker:
+        version: 18.06.0-ce
+    - run: docker run --privileged linuxkit/binfmt:v0.6
     - run: mkdir -v -p ${HOME}/bin
     - run: curl -L 'https://github.com/aktau/github-release/releases/download/v0.7.2/linux-amd64-github-release.tar.bz2' | tar xvjf - --strip-components 3 -C ${HOME}/bin
     - run: echo 'export PATH=${HOME}/bin:${PATH}' >> ${BASH_ENV}
@@ -116,19 +120,23 @@ jobs:
     - store_artifacts:
         path: .tarballs
         destination: releases
-    - run: ln -s .build/linux-amd64/alertmanager alertmanager
-    - run: ln -s .build/linux-amd64/amtool amtool
     - run: make docker DOCKER_IMAGE_TAG=$CIRCLE_TAG
     - run: make docker DOCKER_IMAGE_TAG=$CIRCLE_TAG DOCKER_REPO=quay.io/prometheus
     - run: docker login -u $DOCKER_LOGIN -p $DOCKER_PASSWORD
     - run: docker login -u $QUAY_LOGIN -p $QUAY_PASSWORD quay.io
+    - run: make docker-publish DOCKER_IMAGE_TAG="$CIRCLE_TAG"
+    - run: make docker-publish DOCKER_IMAGE_TAG="$CIRCLE_TAG" DOCKER_REPO=quay.io/prometheus
+    - run: make docker-manifest DOCKER_IMAGE_TAG="$CIRCLE_TAG"
+    - run: make docker-manifest DOCKER_IMAGE_TAG="$CIRCLE_TAG" DOCKER_REPO=quay.io/prometheus
     - run: |
         if [[ "$CIRCLE_TAG" =~ ^v[0-9]+(\.[0-9]+){2}$ ]]; then
           make docker-tag-latest DOCKER_IMAGE_TAG="$CIRCLE_TAG"
           make docker-tag-latest DOCKER_IMAGE_TAG="$CIRCLE_TAG" DOCKER_REPO=quay.io/prometheus
+          make docker-publish DOCKER_IMAGE_TAG="latest"
+          make docker-publish DOCKER_IMAGE_TAG="latest" DOCKER_REPO=quay.io/prometheus
+          make docker-manifest DOCKER_IMAGE_TAG="latest"
+          make docker-manifest DOCKER_IMAGE_TAG="latest" DOCKER_REPO=quay.io/prometheus
         fi
-    - run: make docker-publish
-    - run: make docker-publish DOCKER_REPO=quay.io/prometheus
 
 workflows:
   version: 2
diff --git a/Dockerfile b/Dockerfile
index ab6303a2..7d98d53c 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,9 +1,13 @@
-FROM        prom/busybox:latest
+ARG ARCH="amd64"
+ARG OS="linux"
+FROM quay.io/prometheus/busybox-${OS}-${ARCH}:latest
 LABEL maintainer="The Prometheus Authors <prometheus-developers@googlegroups.com>"
 
-COPY amtool                       /bin/amtool
-COPY alertmanager                 /bin/alertmanager
-COPY examples/ha/alertmanager.yml /etc/alertmanager/alertmanager.yml
+ARG ARCH="amd64"
+ARG OS="linux"
+COPY .build/${OS}-${ARCH}/amtool       /bin/amtool
+COPY .build/${OS}-${ARCH}/alertmanager /bin/alertmanager
+COPY examples/ha/alertmanager.yml      /etc/alertmanager/alertmanager.yml
 
 RUN mkdir -p /alertmanager && \
     chown -R nobody:nogroup etc/alertmanager /alertmanager
diff --git a/Makefile b/Makefile
index 54ce0b7a..7bec8a01 100644
--- a/Makefile
+++ b/Makefile
@@ -11,6 +11,9 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+# Needs to be defined before including Makefile.common to auto-generate targets
+DOCKER_ARCHS ?= amd64 armv7 arm64
+
 include Makefile.common
 
 FRONTEND_DIR             = $(BIN_DIR)/ui/app