Build ARM container images (#242)

It also updates the Circle CI configuration to use the
Prometheus orb.

Signed-off-by: Simon Pasquier <spasquie@redhat.com>

.circleci/config.yml

@@ -1,6 +1,9 @@
 ---
 version: 2.1
 
+orbs:
+  prometheus: prometheus/prometheus@0.1.0
+
 executors:
   # Whenever the Go version is updated here, .travis.yml and .promu.yml
   # should also be updated.
@@ -13,80 +16,11 @@ jobs:
     executor: golang
 
     steps:
-    - checkout
-    - run: make promu
+    - prometheus/setup_environment
     - run: make
     - run: git diff --exit-code
-    - store_artifacts:
-        path: statsd_exporter
-        destination: /build/statsd_exporter
-    - run: rm -v statsd_exporter
-
-  build:
-    machine: true
-
-    steps:
-    - checkout
-    - run: make promu
-    - run: promu crossbuild -v
-    - persist_to_workspace:
-        root: .
-        paths:
-        - .build
-    - store_artifacts:
-        path: .build
-        destination: /build
-
-  docker_hub_master:
-    executor: golang
-
-    steps:
-    - checkout
-    - setup_remote_docker
-    - attach_workspace:
-        at: .
-    - run: ln -s .build/linux-amd64/statsd_exporter statsd_exporter
-    - run: make docker
-    - run: make docker DOCKER_REPO=quay.io/prometheus
-    - run: docker images
-    - run: docker login -u $DOCKER_LOGIN -p $DOCKER_PASSWORD
-    - run: docker login -u $QUAY_LOGIN -p $QUAY_PASSWORD quay.io
-    - run: make docker-publish
-    - run: make docker-publish DOCKER_REPO=quay.io/prometheus
-
-  docker_hub_release_tags:
-    executor: golang
-
-    steps:
-    - checkout
-    - setup_remote_docker
-    - attach_workspace:
-        at: .
-    - run: make promu
-    - run: promu crossbuild tarballs
-    - run: promu checksum .tarballs
-    - run: promu release .tarballs
-    - store_artifacts:
-        path: .tarballs
-        destination: releases
-    - run: ln -s .build/linux-amd64/statsd_exporter statsd_exporter
-    - run: make docker DOCKER_IMAGE_TAG=$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
+    - prometheus/store_artifact:
+        file: statsd_exporter
 
 workflows:
   version: 2
@@ -96,11 +30,12 @@ workflows:
         filters:
           tags:
             only: /.*/
-    - build:
+    - prometheus/build:
+        name: build
         filters:
           tags:
             only: /.*/
-    - docker_hub_master:
+    - prometheus/publish_master:
         context: org-context
         requires:
         - test
@@ -108,7 +43,7 @@ workflows:
         filters:
           branches:
             only: master
-    - docker_hub_release_tags:
+    - prometheus/publish_release:
         context: org-context
         requires:
         - test

.dockerignore

@@ -2,3 +2,5 @@
 .tarballs/
 
 !.build/linux-amd64
+!.build/linux-armv7
+!.build/linux-arm64

Dockerfile

@@ -1,7 +1,11 @@
-FROM  quay.io/prometheus/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 statsd_exporter /bin/statsd_exporter
+ARG ARCH="amd64"
+ARG OS="linux"
+COPY .build/${OS}-${ARCH}/statsd_exporter /bin/statsd_exporter
 
 USER        nobody
 EXPOSE      9102 9125 9125/udp

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
 
 STATICCHECK_IGNORE =