Use a patched golang version for building linux/arm, fixes kube-apiserver

build/build-image/Dockerfile

@@ -18,8 +18,8 @@ FROM gcr.io/google_containers/kube-cross:KUBE_BUILD_IMAGE_CROSS_TAG
 # Mark this as a kube-build container
 RUN touch /kube-build-image
 
-# TO run as non-root we sometimes need to rebuild go stdlib packages.
-RUN chmod -R a+rwx /usr/local/go/pkg
+# To run as non-root we sometimes need to rebuild go stdlib packages.
+RUN chmod -R a+rwx /usr/local/go/pkg ${K8S_PATCHED_GOROOT}/pkg
 
 # The kubernetes source is expected to be mounted here.  This will be the base
 # of operations.

build/build-image/cross/Dockerfile

@@ -35,7 +35,7 @@ RUN for platform in ${KUBE_CROSSPLATFORMS}; do GOOS=${platform%/*} GOARCH=${plat
 
 # Install g++, then download and install protoc for generating protobuf output
 RUN apt-get update \
-  && apt-get install -y g++ rsync apt-utils file \
+  && apt-get install -y g++ rsync apt-utils file patch \
   && apt-get clean && rm -rf /var/lib/apt/lists/*
 
 RUN mkdir -p /usr/local/src/protobuf \
@@ -77,3 +77,16 @@ RUN export ETCD_VERSION=v2.2.1; \
   && cd /usr/local/src/etcd \
   && curl -fsSL https://github.com/coreos/etcd/releases/download/${ETCD_VERSION}/etcd-${ETCD_VERSION}-linux-amd64.tar.gz | tar -xz \
   && ln -s ../src/etcd/etcd-${ETCD_VERSION}-linux-amd64/etcd /usr/local/bin/
+
+# TODO: Remove the patched GOROOT when we have an official golang that has a working arm and ppc64le linker
+ENV K8S_PATCHED_GOLANG_VERSION=1.7.1 \
+    K8S_PATCHED_GOROOT=/usr/local/go_k8s_patched
+RUN mkdir -p ${K8S_PATCHED_GOROOT} \
+  && curl -sSL https://github.com/golang/go/archive/go${K8S_PATCHED_GOLANG_VERSION}.tar.gz | tar -xz -C ${K8S_PATCHED_GOROOT} --strip-components=1
+
+COPY golang-patches/CL28857-go1.7.1-luxas.patch ${K8S_PATCHED_GOROOT}/
+RUN cd ${K8S_PATCHED_GOROOT} \
+  && patch -p1 < CL28857-go1.7.1-luxas.patch \
+  && cd src \
+  && GOROOT_FINAL=${K8S_PATCHED_GOROOT} GOROOT_BOOTSTRAP=/usr/local/go ./make.bash \
+  && for platform in linux/arm; do GOOS=${platform%/*} GOARCH=${platform##*/} GOROOT=${K8S_PATCHED_GOROOT} go install std; done

build/build-image/cross/VERSION

-v1.6.3-6
+v1.6.3-7

hack/lib/golang.sh

@@ -100,7 +100,6 @@ else
     linux/amd64
     darwin/amd64
     windows/amd64
-    linux/arm
   )
 fi
 
@@ -226,7 +225,7 @@ kube::golang::current_platform() {
 # for that platform.
 kube::golang::set_platform_envs() {
   [[ -n ${1-} ]] || {
-    kube::log::error_exit "!!! Internal error.  No platform set in kube::golang::set_platform_envs"
+    kube::log::error_exit "!!! Internal error. No platform set in kube::golang::set_platform_envs"
   }
 
   export GOOS=${platform%/*}
@@ -240,6 +239,7 @@ kube::golang::set_platform_envs() {
     if [[ ${platform} == "linux/arm" ]]; then
       export CGO_ENABLED=1
       export CC=arm-linux-gnueabi-gcc
+      export GOROOT=${K8S_PATCHED_GOROOT}
     elif [[ ${platform} == "linux/arm64" ]]; then
       export CGO_ENABLED=1
       export CC=aarch64-linux-gnu-gcc
@@ -253,6 +253,7 @@ kube::golang::set_platform_envs() {
 kube::golang::unset_platform_envs() {
   unset GOOS
   unset GOARCH
+  unset GOROOT
   unset CGO_ENABLED
   unset CC
 }
@@ -477,6 +478,11 @@ kube::golang::build_binaries_for_platform() {
       kube::golang::fallback_if_stdlib_not_installable;
   fi
 
+  # TODO: Remove this temporary workaround when we have the official golang linker working
+  if [[ ${platform} == "linux/arm" ]]; then
+    gogcflags="${gogcflags} -largemodel"
+  fi
+
   if [[ -n ${use_go_build:-} ]]; then
     kube::log::progress "    "
     for binary in "${statics[@]:+${statics[@]}}"; do