Multi architecture support for init-controller image (#68)

* support multiple docker arch image

* have to use buildx

* trying travis

* changed default repo for deploy

* changed repo

* edited out releases on travis branch

* commented out tests

* change to use TRAVIS TAG

* removed tests

* removed test script

* install qemu

* changed script

* check contnets of package

* list contents

* list package

* changed makefile

* reverted back to allow merge into appsody

* removed return at the end of test file

* removed duplicate line at start of script

* changes from feeedback

* fixed declare

Author: CameronMcWilliam

.gitignore

@@ -1,4 +1,5 @@
 /controller
 /build
 /package
-.vscode/
+.vscode/
+.DS_Store

.travis.yml

@@ -12,6 +12,13 @@ go_import_path: github.com/appsody/controller
 services:
 - docker
 
+#Install later docker version
+before_install:
+  - curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
+  - sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"
+  - sudo apt-get update
+  - sudo apt-get -y -o Dpkg::Options::="--force-confnew" install docker-ce
+
 # skip because dependencies are baked in vendor dir
 install: true
 
@@ -35,7 +42,7 @@ deploy:
       repo: appsody/controller
   - provider: script
     skip_cleanup: true
-    script: bash ./build.sh
+    script: ./build.sh
     on:
       tags: true
       repo: appsody/controller

Dockerfile

@@ -1,6 +1,6 @@
 FROM busybox
-
-COPY ./package/appsody-controller /appsody-controller
+ARG TARGETPLATFORM
+COPY ./package/appsody-controller-$TARGETPLATFORM /appsody-controller
 RUN  chmod +x /appsody-controller
 WORKDIR /
 CMD ["cp","/appsody-controller","/.appsody/appsody-controller"]

Makefile

@@ -51,12 +51,13 @@ clean: ## Removes existing build artifacts in order to get a fresh build
 
 .PHONY: build
 build: ## Build binary for linux stores it in the build/ dir
-	GOOS=linux CGO_ENABLED=0 GOARCH=amd64 go build -o $(BUILD_PATH)/$(COMMAND) -ldflags "-X main.VERSION=$(VERSION)"
+	chmod u+r+x go_build.sh
+	./go_build.sh $(VERSION)
 
 .PHONY: package
 package: build ## Build the linux binary and stores it in package/ dir
 	mkdir -p $(PACKAGE_PATH)
-	cp -p $(BUILD_PATH)/$(COMMAND) $(PACKAGE_PATH)/
+	cp -ap $(BUILD_PATH)/. $(PACKAGE_PATH)/
 
 # Auto documented help from http://marmelab.com/blog/2016/02/29/auto-documented-makefile.html
 .PHONY: help

build.sh

@@ -1,7 +1,10 @@
 #!/bin/bash
-
-
 set -e
 echo "$DOCKER_PASSWORD" | docker login -u "$DOCKER_USERNAME" --password-stdin
-docker build -t $DOCKER_ORG/init-controller:$TRAVIS_TAG -t $DOCKER_ORG/init-controller:latest .
-docker push $DOCKER_ORG/init-controller
+# enables experimental daemon for docker buildx: https://docs.docker.com/buildx/working-with-buildx/ 
+# minimum docker version required for buildx is v19.03
+export DOCKER_CLI_EXPERIMENTAL=enabled
+docker run --rm --privileged multiarch/qemu-user-static --reset -p yes
+docker buildx create --name mybuilder
+docker buildx use mybuilder
+docker buildx build -t $DOCKER_ORG/init-controller:$TRAVIS_TAG -t $DOCKER_ORG/init-controller:latest --platform=linux/amd64,linux/ppc64le,linux/s390x . --push

go_build.sh

@@ -0,0 +1,8 @@
+#!/bin/bash
+set -e
+for OS_ARCH in linux/amd64 linux/ppc64le linux/s390x
+do
+   declare OS=$(echo $OS_ARCH | cut -f1 -d/)
+   declare ARCH=$(echo $OS_ARCH | cut -f2 -d/)
+   GOOS="$OS" CGO_ENABLED=0 GOARCH="$ARCH" go build -o ./build/appsody-controller-"$OS_ARCH" -ldflags "-X main.VERSION=$1"
+done