add multi-arch image(amd64 and s390x) build and publish

.travis.yml

@@ -3,5 +3,26 @@ sudo: required
 services:
   - docker
 
-script:
-  - bash ./build.sh
+jobs:
+  allow_failures:
+  - if: arch = s390x
+  include:
+    - stage: build amd64
+      workspaces:
+        create:
+          name: ws1
+          paths:
+            - tag.txt
+      script: 
+      - bash ./build.sh
+    - stage: build s390x
+      arch: s390x
+      workspaces:
+        use: ws1
+      script:
+      - bash ./build.sh
+    - stage: make multi-arch images
+      workspaces:
+        use: ws1
+      script:
+      - 'if [ "$TRAVIS_PULL_REQUEST" = "false" ]; then bash ./multi-arch-image.sh; fi'

build.sh

@@ -10,44 +10,51 @@
 set -e
 
 image="alpine/git"
-
+ARCH=${TRAVIS_CPU_ARCH:-"amd64"}
 LATEST_TAG=$(git ls-remote --tags origin |awk -F \/ '{print $NF}'|grep ^1.0. |sort -Vr|head -1)
 if [[ -z "${LATEST_TAG}" ]]
 then
     NEXT_TAG="1.0.0"
 else
-    NEXT_TAG=$(docker run --rm alpine/semver:5.5.0 semver -c -i patch ${LATEST_TAG})
+    if [[ "$ARCH" == "amd64" ]]
+    then	    
+    	NEXT_TAG=$(docker run --rm alpine/semver:5.5.0 semver -c -i patch ${LATEST_TAG})
+	echo ${NEXT_TAG} > tag.txt 
+    else
+	NEXT_TAG=$(cat tag.txt) 
+    fi
 fi
 echo ${NEXT_TAG}
 
-docker build --no-cache -t ${image}:${NEXT_TAG} .
-docker tag ${image}:${NEXT_TAG} ${image}:latest
+docker build --no-cache -t ${image}:${NEXT_TAG}-${ARCH} .
+docker tag ${image}:${NEXT_TAG}-${ARCH} ${image}:latest-${ARCH}
 
 # add another tag with git version, with this way, we can check this git image health
-VERSION=($(docker run -i --rm ${image}:latest version|awk '{print $NF}'))
+VERSION=($(docker run -i --rm ${image}:latest-${ARCH} version|awk '{print $NF}'))
 echo ${VERSION}
-docker tag ${image}:${NEXT_TAG} ${image}:v${VERSION}
+docker tag ${image}:${NEXT_TAG}-${ARCH} ${image}:v${VERSION}-${ARCH}
 
 if [[ "$TRAVIS_BRANCH" == "master" && "$TRAVIS_PULL_REQUEST" == false ]]; then
   docker login -u $DOCKER_USERNAME -p $DOCKER_PASSWORD
-  docker push ${image}:${NEXT_TAG}
-  docker push ${image}:latest
-  docker push ${image}:v${VERSION}
-
-  # push the tag
-  git remote set-url origin https://${GITHUB_NAME}:${GITHUB_TOKEN}@github.com/alpine-docker/git.git
-  echo "Set github Username & Email"
-  git config user.name "ci"
-  git config user.email "ci"
-  echo "Create & Push Tag"
-  git tag ${NEXT_TAG}
-  git push origin ${NEXT_TAG}
+  docker push ${image}:${NEXT_TAG}-${ARCH}
+  docker push ${image}:latest-${ARCH}
+  docker push ${image}:v${VERSION}-${ARCH}
+  if [[ "$ARCH" == "amd64" ]]; then
+    # push the tag
+    git remote set-url origin https://${GITHUB_NAME}:${GITHUB_TOKEN}@github.com/alpine-docker/git.git
+    echo "Set github Username & Email"
+    git config user.name "ci"
+    git config user.email "ci"
+    echo "Create & Push Tag"
+    git tag ${NEXT_TAG}
+    git push origin ${NEXT_TAG}
+  fi
 fi
 
 if [[ "$TRAVIS_BRANCH" == "feature/non-root" && "$TRAVIS_PULL_REQUEST" == false ]]; then
   docker login -u $DOCKER_USERNAME -p $DOCKER_PASSWORD
-  docker tag ${image}:v${VERSION} ${image}:user
-  docker tag ${image}:v${VERSION} ${image}:v${VERSION}-user
-  docker push ${image}:user
-  docker push ${image}:v${VERSION}-user
+  docker tag ${image}:v${VERSION}-${ARCH} ${image}-${ARCH}:user-${ARCH}
+  docker tag ${image}:v${VERSION}-${ARCH} ${image}-${ARCH}:v${VERSION}-user-${ARCH}
+  docker push ${image}:user-${ARCH}
+  docker push ${image}:v${VERSION}-user-${ARCH}
 fi

multi-arch-image.sh

@@ -0,0 +1,42 @@
+#!/usr/bin/env bash
+
+# Prerequisite
+# Make sure you set secret enviroment variables in Travis CI
+# DOCKER_USERNAME
+# DOCKER_PASSWORD
+
+set -e
+
+function get_arch_images(){
+    image=$1; shift || fatal "usage error"
+    tag=$1; shift || fatal "usage error"
+    archs="amd64 s390x"
+    for arch in $archs; do
+        if [[ "$(docker pull ${image}:${tag}-${arch} >/dev/null 2>&1 ; echo $?)" == 0 ]]; then
+        	echo "${image}:${tag}-${arch} "
+	fi
+    done
+}
+
+image="alpine/git"
+if [[ "$TRAVIS_BRANCH" == "master" && "$TRAVIS_PULL_REQUEST" == false ]]; then
+  docker login -u $DOCKER_USERNAME -p $DOCKER_PASSWORD	
+  NEXT_TAG=$(cat tag.txt)
+  VERSION=$(docker run -i --rm ${image}:latest-amd64 version|awk '{print $NF}')
+  #create and push multi-arch 3 images - latest, ${NEXT_TAG} and v${VERSION}
+  DOCKER_CLI_EXPERIMENTAL="enabled" docker manifest create ${image}:${NEXT_TAG} $(get_arch_images ${image} ${NEXT_TAG})
+  DOCKER_CLI_EXPERIMENTAL="enabled" docker manifest push --purge ${image}:${NEXT_TAG}
+  DOCKER_CLI_EXPERIMENTAL="enabled" docker manifest create ${image}:latest $(get_arch_images ${image} "latest")
+  DOCKER_CLI_EXPERIMENTAL="enabled" docker manifest push --purge ${image}:latest
+  DOCKER_CLI_EXPERIMENTAL="enabled" docker manifest create ${image}:v${VERSION} $(get_arch_images ${image} v${VERSION})
+  DOCKER_CLI_EXPERIMENTAL="enabled" docker manifest push --purge ${image}:v${VERSION}
+fi
+
+if [[ "$TRAVIS_BRANCH" == "feature/non-root" && "$TRAVIS_PULL_REQUEST" == false ]]; then
+  docker login -u $DOCKER_USERNAME -p $DOCKER_PASSWORD
+  #create and push multi-arch 2 images - user and v${VERSION}-user
+  DOCKER_CLI_EXPERIMENTAL="enabled" docker manifest create ${image}:user $(get_arch_images ${image} "user")
+  DOCKER_CLI_EXPERIMENTAL="enabled" docker manifest push --purge ${image}:user
+  DOCKER_CLI_EXPERIMENTAL="enabled" docker manifest create ${image}:v${VERSION}-user $(get_arch_images ${image} v${VERSION}-user)
+  DOCKER_CLI_EXPERIMENTAL="enabled" docker manifest push --purge ${image}:v${VERSION}-user
+fi