Build Kubernetes binaries for ARM on amd64

Dockerfile

FROM golang:1.5.2

MAINTAINER Lucas Käldström <lucas.kaldstrom@hotmail.co.uk>

# Enable cgo cross-compilation for armel
RUN echo "deb http://emdebian.org/tools/debian/ jessie main" > /etc/apt/sources.list.d/crosstools.list \
	&& curl -s http://emdebian.org/tools/debian/emdebian-toolchain-archive.key | apt-key add - \
	&& dpkg --add-architecture armel \
	&& apt-get update \
	&& apt-get install -y build-essential crossbuild-essential-armel rsync upx

# Important ENV variables
ENV GOARM=6	\
	GOARCH=arm 	\
	CC=arm-linux-gnueabi-gcc \
	K8S_DIR="$GOPATH/src/k8s.io/kubernetes"	\
	K8S_CONTRIB="$GOPATH/src/k8s.io/contrib" \
	ETCD_DIR="$GOPATH/src/github.com/coreos/etcd" \
	FLANNEL_DIR="$GOPATH/src/github.com/coreos/flannel"	\
	REGISTRY_DIR="$GOPATH/src/github.com/docker/distribution" \
	OUT_DIR="/output" \
	ETCD_VERSION=v2.2.2	\
	FLANNEL_VERSION=v0.5.5 \
	K8S_VERSION=v1.1.3 \
	REGISTRY_VERSION=v2.2.1 \
	KUBE_STATIC_OVERRIDES="kubectl" \
	KUBE_BUILD_PLATFORMS=linux/arm 								


# Make directories
RUN mkdir -p $OUT_DIR \
			$K8S_DIR \
			$K8S_CONTRIB \
			$GOPATH/src/github.com/GoogleCloudPlatform \
			$ETCD_DIR \
			$FLANNEL_DIR \
			$REGISTRY_DIR \
	&& ln -s $GOPATH/src/k8s.io/kubernetes $GOPATH/src/github.com/GoogleCloudPlatform/kubernetes

# Build etcd
RUN curl -sSL https://github.com/coreos/etcd/archive/$ETCD_VERSION.tar.gz | tar -C $ETCD_DIR -xz --strip-components=1 \
	&& cd $ETCD_DIR \
	&& ./build \
	&& cp bin/* $OUT_DIR

# Build flannel
RUN curl -sSL https://github.com/coreos/flannel/archive/$FLANNEL_VERSION.tar.gz | tar -C $FLANNEL_DIR -xz --strip-components=1 \
	&& cd $FLANNEL_DIR	\
	&& CGO_ENABLED=1 ./build \
	&& cp bin/* $OUT_DIR

# Build kubernetes
RUN curl -sSL https://github.com/kubernetes/kubernetes/archive/$K8S_VERSION.tar.gz | tar -C $K8S_DIR -xz --strip-components=1 \
	&& cd $K8S_DIR \
	&& mv Godeps/_workspace/src/github.com/docker/libcontainer/seccomp/jump_amd64.go \
	      Godeps/_workspace/src/github.com/docker/libcontainer/seccomp/jump.go \
	&& sed -e "s@,amd64@@" -i Godeps/_workspace/src/github.com/docker/libcontainer/seccomp/jump.go \
	&& curl -sSL https://raw.githubusercontent.com/kubernetes/kubernetes/8c1d820435670e410f8fd54401906c3d387c2098/pkg/util/io/writer.go > pkg/util/io/writer.go \
	&& CGO_ENABLED=1 ./hack/build-go.sh cmd/hyperkube cmd/kubectl \
	&& cp _output/local/bin/linux/arm/* $OUT_DIR

# Build two compilation tools for host arch
RUN GOARCH=amd64 go get github.com/tools/godep \
	&& GOARCH=amd64 go get github.com/pwaller/goupx

# Build the pause image
RUN cd $K8S_DIR/build/pause \
	&& CGO_ENABLED=0 go build -a -installsuffix cgo -ldflags '-w' ./pause.go \
	&& goupx pause \
	&& cp pause $OUT_DIR

RUN cd $K8S_DIR/cluster/addons/dns/kube2sky \
	&& sed -e "s@GOARCH=amd64@GOARCH=arm@" -i Makefile \
	&& make kube2sky \
	&& cp kube2sky $OUT_DIR

RUN CGO_ENABLED=0 go get -a -installsuffix cgo --ldflags '-w' github.com/skynetservices/skydns \
	&& cp $GOPATH/bin/linux_arm/skydns $OUT_DIR

# Build Kubernetes contrib binaries
RUN curl -sSL https://github.com/kubernetes/contrib/archive/master.tar.gz | tar -xz -C $K8S_CONTRIB --strip-components=1 \
	&& cd $K8S_CONTRIB/service-loadbalancer \
	&& make server \
	&& cp service_loadbalancer $OUT_DIR

RUN cd $K8S_CONTRIB/exec-healthz \
	&& make server \
	&& cp exechealthz $OUT_DIR

RUN cd $K8S_CONTRIB/scale-demo/aggregator \
	&& make aggregator \
	&& cp aggregator $OUT_DIR

RUN cd $K8S_CONTRIB/scale-demo/vegeta \
	&& CGO_ENABLED=0 GOOS=linux godep go build -a -installsuffix cgo -ldflags '-w' -o loader \
	&& cp loader $OUT_DIR

# Build docker registry for the addons
RUN curl -sSL https://github.com/docker/distribution/archive/$REGISTRY_VERSION.tar.gz | tar -xz -C $REGISTRY_DIR --strip-components=1 \
	&& cd $REGISTRY_DIR/cmd/registry \
	&& CGO_ENABLED=1 GOPATH=$REGISTRY_DIR/Godeps/_workspace:$GOPATH go build \
	&& cp registry $OUT_DIR

It's great 👍