From fe9bfc8bfe99f062829619cb1bc976c207a62fd2 Mon Sep 17 00:00:00 2001
From: Stefan Prodan <stefan.prodan@gmail.com>
Date: Fri, 5 Jan 2018 19:45:25 +0200
Subject: [PATCH] multi-arch build

---
 Dockerfile |  8 +++++
 Makefile   | 97 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 105 insertions(+)
 create mode 100644 Dockerfile
 create mode 100644 Makefile

diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..b629e59
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,8 @@
+FROM alpine:latest
+
+RUN apk add --no-cache curl openssl
+
+ADD podinfo /podinfo
+
+EXPOSE 9898
+ENTRYPOINT ["/podinfo"]
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..94c7681
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,97 @@
+# Makefile for releasing Alpine multi-arch Docker images
+#
+# The release version is controlled from pkg/version
+#
+# Prerequsitesx:
+
+
+EMPTY:=
+SPACE:=$(EMPTY) $(EMPTY)
+COMMA:=$(EMPTY),$(EMPTY)
+
+ifeq (, $(shell which manifest-tool))
+    $(error "No manifest-tool in $$PATH, install with: go get github.com/estesp/manifest-tool")
+endif
+
+DOCKER_REPOSITORY:=stefanprodan
+NAME:=podinfo
+VERSION:=$(shell grep 'VERSION' pkg/version/version.go | awk '{ print $$4 }' | tr -d '"')
+DOCKER_IMAGE_NAME:=$(DOCKER_REPOSITORY)/$(NAME)
+GITCOMMIT:=$(shell git describe --dirty --always)
+LINUX_ARCH:=amd64 arm arm64 ppc64le
+PLATFORMS:=$(subst $(SPACE),$(COMMA),$(foreach arch,$(LINUX_ARCH),linux/$(arch)))
+
+all:
+	@echo Use the 'release' target to start a release
+
+release: build tar
+
+docker: docker-build docker-push
+
+.PHONY: build
+build:
+	@echo Cleaning old builds
+	@rm -rf build && mkdir build
+	@echo Building: darwin $(VERSION)
+	mkdir -p build/darwin/amd64 && CGO_ENABLED=0 GOOS=darwin GOARCH=amd64 go build -ldflags="-s -w -X github.com/stefanprodan/k8s-podinfo/pkg/version.GITCOMMIT=$(GITCOMMIT)" -o build/darwin/amd64/$(NAME) ./cmd/podinfo
+	@echo Building: linux/$(LINUX_ARCH)  $(VERSION) ;\
+	for arch in $(LINUX_ARCH); do \
+	    mkdir -p build/linux/$$arch && CGO_ENABLED=0 GOOS=linux GOARCH=$$arch go build -ldflags="-s -w -X github.com/stefanprodan/k8s-podinfo/pkg/version.GITCOMMIT=$(GITCOMMIT)" -o build/linux/$$arch/$(NAME) ./cmd/podinfo ;\
+	done
+
+.PHONY: tar
+tar:
+	@echo Cleaning old releases
+	@rm -rf release && mkdir release
+	tar -zcf release/$(NAME)_$(VERSION)_darwin_amd64.tgz -C build/darwin/amd64 $(NAME)
+	for arch in $(LINUX_ARCH); do \
+	    tar -zcf release/$(NAME)_$(VERSION)_linux_$$arch.tgz -C build/linux/$$arch $(NAME) ;\
+	done
+
+.PHONY: docker-build
+docker-build: tar
+	# Steps:
+	# 1. Copy appropriate podinfo binary to build/docker/linux/<arch>
+	# 2. Copy Dockerfile to build/docker/linux/<arch>
+	# 3. Replace base image from alpine:latest to <arch>/alpine:latest
+	# 4. Comment RUN in Dockerfile
+	# <arch>:
+	# arm: arm32v6
+	# arm64: arm64v8
+	rm -rf build/docker
+	@for arch in $(LINUX_ARCH); do \
+	    mkdir -p build/docker/linux/$$arch ;\
+	    tar -xzf release/$(NAME)_$(VERSION)_linux_$$arch.tgz -C build/docker/linux/$$arch ;\
+	    cp Dockerfile build/docker/linux/$$arch ;\
+	    cp Dockerfile build/docker/linux/$$arch/Dockerfile.in ;\
+	    if [ $$arch != amd64 ]; then \
+		case $$arch in \
+	        arm) \
+	            BASEIMAGE=arm32v6 ;\
+	            ;; \
+	        arm64) \
+	            BASEIMAGE=arm64v8 ;\
+	            ;; \
+	        *) \
+	            BASEIMAGE=$$arch ;\
+	            ;; \
+	        esac ;\
+	        sed -e "s/alpine:latest/$$BASEIMAGE\\/alpine:latest/" build/docker/linux/$$arch/Dockerfile.in > build/docker/linux/$$arch/Dockerfile ;\
+	    fi ;\
+	    docker build -t podinfo build/docker/linux/$$arch ;\
+	    docker tag podinfo $(DOCKER_IMAGE_NAME):podinfo-$$arch ;\
+	done
+
+.PHONY: docker-push
+docker-push:
+	@echo Pushing: $(VERSION) to $(DOCKER_IMAGE_NAME)
+	for arch in $(LINUX_ARCH); do \
+	    docker push $(DOCKER_IMAGE_NAME):podinfo-$$arch ;\
+	done
+	manifest-tool push from-args --platforms $(PLATFORMS) --template $(DOCKER_IMAGE_NAME):podinfo-ARCH --target $(DOCKER_IMAGE_NAME):$(VERSION)
+	manifest-tool push from-args --platforms $(PLATFORMS) --template $(DOCKER_IMAGE_NAME):podinfo-ARCH --target $(DOCKER_IMAGE_NAME):latest
+
+.PHONY: clean
+clean:
+	rm -rf release
+	rm -rf build