Add support for building arm, arm64 and ppc64le server and client targets

build/build-image/Dockerfile

@@ -20,8 +20,6 @@ FROM KUBE_BUILD_IMAGE_CROSS
 
 MAINTAINER  Joe Beda <jbeda@google.com>
 
-# (set an explicit GOARM of 5 for maximum compatibility)
-ENV GOARM 5
 ENV GOOS    linux
 ENV GOARCH  amd64
 
@@ -34,8 +32,10 @@ RUN mkdir $TMPDIR && \
 
 # We use rsync to copy some binaries around.  It is faster (0.3s vs. 1.1s) on my
 # machine vs. `install`
-RUN rm -rf /var/lib/apt/lists/
+RUN rm -rf /var/lib/apt/lists/ \
-RUN apt-get -o Acquire::Check-Valid-Until=false update && apt-get install -y rsync
+    && apt-get -o Acquire::Check-Valid-Until=false update \
+    && apt-get install -y rsync \
+    && rm -rf /var/lib/apt/lists/
 
 # Download and symlink etcd.  We need this for our integration tests.
 RUN export ETCD_VERSION=v2.2.1; \

build/build-image/cross/Dockerfile

@@ -18,8 +18,13 @@
 FROM  golang:1.4.2
 MAINTAINER  Joe Beda <jbeda@google.com>
 
+ENV GOARM 6
+ENV KUBE_DYNAMIC_CROSSPLATFORMS \
+  armel
+
 ENV KUBE_CROSSPLATFORMS \
-  linux/386 linux/arm \
+  linux/386 \
+  linux/arm \
   darwin/amd64 darwin/386 \
   windows/amd64 windows/386
 
@@ -38,3 +43,12 @@ RUN apt-get install -y g++ && apt-get clean && rm -rf /var/lib/apt/lists/* &&\
     rm -rf protobuf-3.0.0-beta-2 &&\
     protoc --version
 
+# Use dynamic cgo linking for architectures other than amd64 for the server platforms
+# More info here: https://wiki.debian.org/CrossToolchains
+RUN echo "deb http://emdebian.org/tools/debian/ jessie main" > /etc/apt/sources.list.d/cgocrosscompiling.list \
+  && curl -s http://emdebian.org/tools/debian/emdebian-toolchain-archive.key | apt-key add - \
+  && for platform in ${KUBE_DYNAMIC_CROSSPLATFORMS}; do dpkg --add-architecture ${platform}; done \
+  && apt-get update \
+  && apt-get install -y build-essential \
+  && for platform in ${KUBE_DYNAMIC_CROSSPLATFORMS}; do apt-get install -y crossbuild-essential-${platform}; done \
+  && apt-get clean && rm -rf /var/lib/apt/lists/*

build/common.sh

@@ -49,7 +49,7 @@ readonly KUBE_GCS_DELETE_EXISTING="${KUBE_GCS_DELETE_EXISTING:-n}"
 # Constants
 readonly KUBE_BUILD_IMAGE_REPO=kube-build
 readonly KUBE_BUILD_GOLANG_VERSION=1.4.2
-readonly KUBE_BUILD_IMAGE_CROSS_TAG="cross-${KUBE_BUILD_GOLANG_VERSION}-1"
+readonly KUBE_BUILD_IMAGE_CROSS_TAG="cross-${KUBE_BUILD_GOLANG_VERSION}-2"
 readonly KUBE_BUILD_IMAGE_CROSS="${KUBE_BUILD_IMAGE_REPO}:${KUBE_BUILD_IMAGE_CROSS_TAG}"
 # KUBE_BUILD_DATA_CONTAINER_NAME=kube-build-data-<hash>
 
@@ -90,17 +90,47 @@ readonly RELEASE_STAGE="${LOCAL_OUTPUT_ROOT}/release-stage"
 readonly RELEASE_DIR="${LOCAL_OUTPUT_ROOT}/release-tars"
 readonly GCS_STAGE="${LOCAL_OUTPUT_ROOT}/gcs-stage"
 
-# The set of master binaries that run in Docker (on Linux)
+# Get the set of master binaries that run in Docker (on Linux)
 # Entry format is "<name-of-binary>,<base-image>".
 # Binaries are placed in /usr/local/bin inside the image.
-readonly KUBE_DOCKER_WRAPPED_BINARIES=(
+# 
-  kube-apiserver,busybox
+# $1 - server architecture
-  kube-controller-manager,busybox
+kube::build::get_docker_wrapped_binaries() {
-  kube-scheduler,busybox
+  case $1 in
-  kube-proxy,gcr.io/google_containers/debian-iptables:v1
+    "amd64")
-)
+        local targets=(
+          kube-apiserver,busybox
+          kube-controller-manager,busybox
+          kube-scheduler,busybox
+          kube-proxy,gcr.io/google_containers/debian-iptables:v1
+        );;
+    "arm") # TODO: Use image with iptables installed for kube-proxy for arm, arm64 and ppc64le
+        local targets=(
+          kube-apiserver,hypriot/armhf-busybox
+          kube-controller-manager,hypriot/armhf-busybox
+          kube-scheduler,hypriot/armhf-busybox
+          kube-proxy,hypriot/armhf-busybox
+        );;
+    "arm64")
+        local targets=(
+          kube-apiserver,aarch64/busybox
+          kube-controller-manager,aarch64/busybox
+          kube-scheduler,aarch64/busybox
+          kube-proxy,aarch64/busybox
+        );;
+    "ppc64le")
+        local targets=(
+          kube-apiserver,ppc64le/busybox
+          kube-controller-manager,ppc64le/busybox
+          kube-scheduler,ppc64le/busybox
+          kube-proxy,ppc64le/busybox
+        );;
+  esac
 
-# The set of addons images that should be prepopulated
+  echo "${targets[@]}"
+}
+
+# The set of addons images that should be prepopulated on linux/amd64
 readonly KUBE_ADDON_PATHS=(
   gcr.io/google_containers/pause:2.0
   gcr.io/google_containers/kube-registry-proxy:0.3
@@ -109,7 +139,7 @@ readonly KUBE_ADDON_PATHS=(
 # ---------------------------------------------------------------------------
 # Basic setup functions
 
-# Verify that the right utilities and such are installed for building Kube.  Set
+# Verify that the right utilities and such are installed for building Kube. Set
 # up some dynamic constants.
 #
 # Vars set:
@@ -669,7 +699,7 @@ function kube::release::package_tarballs() {
   kube::util::wait-for-jobs || { kube::log::error "previous tarball phase failed"; return 1; }
 }
 
-# Package up all of the cross compiled clients.  Over time this should grow into
+# Package up all of the cross compiled clients. Over time this should grow into
 # a full SDK
 function kube::release::package_client_tarballs() {
    # Find all of the built client binaries
@@ -726,7 +756,11 @@ function kube::release::package_server_tarballs() {
       "${release_stage}/server/bin/"
 
     kube::release::create_docker_images_for_server "${release_stage}/server/bin" "${arch}"
-    kube::release::write_addon_docker_images_for_server "${release_stage}/addons"
+    
+    # Only release addon images for linux/amd64. These addon images aren't necessary for other architectures
+    if [[ ${platform} == "linux/amd64" ]]; then
+      kube::release::write_addon_docker_images_for_server "${release_stage}/addons"
+    fi
 
     # Include the client binaries here too as they are useful debugging tools.
     local client_bins=("${KUBE_CLIENT_BINARIES[@]}")
@@ -764,15 +798,15 @@ function kube::release::sha1() {
 # Args:
 #  $1 - binary_dir, the directory to save the tared images to.
 #  $2 - arch, architecture for which we are building docker images.
-# Globals:
-#   KUBE_DOCKER_WRAPPED_BINARIES
 function kube::release::create_docker_images_for_server() {
   # Create a sub-shell so that we don't pollute the outer environment
   (
     local binary_dir="$1"
     local arch="$2"
     local binary_name
-    for wrappable in "${KUBE_DOCKER_WRAPPED_BINARIES[@]}"; do
+    local binaries=($(kube::build::get_docker_wrapped_binaries ${arch}))
+
+    for wrappable in "${binaries[@]}"; do
 
       local oldifs=$IFS
       IFS=","
@@ -797,7 +831,14 @@ function kube::release::create_docker_images_for_server() {
         ln ${binary_dir}/${binary_name} ${docker_build_path}/${binary_name}
         printf " FROM ${base_image} \n ADD ${binary_name} /usr/local/bin/${binary_name}\n" > ${docker_file_path}
 
-        local docker_image_tag=gcr.io/google_containers/$binary_name:$md5_sum
+        if [[ ${arch} == "amd64" ]]; then
+          # If we are building a amd64 docker image, preserve the original image name
+          local docker_image_tag=gcr.io/google_containers/${binary_name}:${md5_sum}
+        else
+          # If we are building a docker image for another architecture, append the arch in the image tag
+          local docker_image_tag=gcr.io/google_containers/${binary_name}-${arch}:${md5_sum}
+        fi
+
         "${DOCKER[@]}" build -q -t "${docker_image_tag}" ${docker_build_path} >/dev/null
         "${DOCKER[@]}" save ${docker_image_tag} > ${binary_dir}/${binary_name}.tar
         echo $md5_sum > ${binary_dir}/${binary_name}.docker_tag
@@ -930,7 +971,7 @@ function kube::release::package_test_tarball() {
   mkdir -p "${release_stage}"
 
   local platform
-  for platform in "${KUBE_CLIENT_PLATFORMS[@]}"; do
+  for platform in "${KUBE_TEST_PLATFORMS[@]}"; do
     local test_bins=("${KUBE_TEST_BINARIES[@]}")
     if [[ "${platform%/*}" == "windows" ]]; then
       test_bins=("${KUBE_TEST_BINARIES_WIN[@]}")
@@ -1482,6 +1523,9 @@ function kube::release::docker::release() {
 
   local archs=(
     "amd64"
+    "arm"
+    "arm64"
+    "ppc64le"
   )
 
   local docker_push_cmd=("${DOCKER[@]}")
@@ -1494,6 +1538,16 @@ function kube::release::docker::release() {
       local docker_target="${KUBE_DOCKER_REGISTRY}/${binary}-${arch}:${KUBE_DOCKER_IMAGE_TAG}"
       kube::log::status "Pushing ${binary} to ${docker_target}"
       "${docker_push_cmd[@]}" push "${docker_target}"
+
+      # If we have a amd64 docker image. Tag it without -amd64 also and push it for compability with earlier versions
+      if [[ ${arch} == "amd64" ]]; then
+        local legacy_docker_target="${KUBE_DOCKER_REGISTRY}/${binary}:${KUBE_DOCKER_IMAGE_TAG}"
+
+        "${DOCKER[@]}" tag -f "${docker_target}" "${legacy_docker_target}" 2>/dev/null
+
+        kube::log::status "Pushing ${binary} to ${legacy_docker_target}"
+        "${docker_push_cmd[@]}" push "${legacy_docker_target}"
+      fi
     done
   done
 }

hack/build-cross.sh

@@ -28,6 +28,9 @@ KUBE_BUILD_PLATFORMS=("${KUBE_SERVER_PLATFORMS[@]}")
 kube::golang::build_binaries "${KUBE_SERVER_TARGETS[@]}"
 
 KUBE_BUILD_PLATFORMS=("${KUBE_CLIENT_PLATFORMS[@]}")
-kube::golang::build_binaries "${KUBE_CLIENT_TARGETS[@]}" "${KUBE_TEST_TARGETS[@]}"
+kube::golang::build_binaries "${KUBE_CLIENT_TARGETS[@]}"
+
+KUBE_BUILD_PLATFORMS=("${KUBE_TEST_PLATFORMS[@]}")
+kube::golang::build_binaries "${KUBE_TEST_TARGETS[@]}"
 
 kube::golang::place_bins

hack/lib/golang.sh

@@ -60,6 +60,18 @@ readonly KUBE_CLIENT_TARGETS=(
 readonly KUBE_CLIENT_BINARIES=("${KUBE_CLIENT_TARGETS[@]##*/}")
 readonly KUBE_CLIENT_BINARIES_WIN=("${KUBE_CLIENT_BINARIES[@]/%/.exe}")
 
+# If we update this we should also update the set of golang compilers we build
+# in 'build/build-image/cross/Dockerfile'. However, it's only a bit faster since go 1.5, not mandatory 
+readonly KUBE_CLIENT_PLATFORMS=(
+  linux/amd64
+  linux/386
+  linux/arm
+  darwin/amd64
+  darwin/386
+  windows/amd64
+  windows/386
+)
+
 # The set of test targets that we are building for all platforms
 kube::golang::test_targets() {
   local targets=(
@@ -97,14 +109,10 @@ readonly KUBE_TEST_PORTABLE=(
   hack/lib
 )
 
-# If we update this we need to also update the set of golang compilers we build
+# Which platforms we should compile test targets for. Not all client platforms need these tests
-# in 'build/build-image/Dockerfile'
+readonly KUBE_TEST_PLATFORMS=(
-readonly KUBE_CLIENT_PLATFORMS=(
   linux/amd64
-  linux/386
-  linux/arm
   darwin/amd64
-  darwin/386
   windows/amd64
 )
 
@@ -161,7 +169,7 @@ kube::golang::binaries_from_targets() {
   done
 }
 
-# Asks golang what it thinks the host platform is.  The go tool chain does some
+# Asks golang what it thinks the host platform is. The go tool chain does some
 # slightly different things when the target platform matches the host platform.
 kube::golang::host_platform() {
   echo "$(go env GOHOSTOS)/$(go env GOHOSTARCH)"
@@ -190,11 +198,26 @@ kube::golang::set_platform_envs() {
 
   export GOOS=${platform%/*}
   export GOARCH=${platform##*/}
+
+  # Dynamic CGO linking for other server architectures than linux/amd64 goes here
+  # If you want to include support for more server platforms than these, add arch-specific gcc names here
+  if [[ ${platform} == "linux/arm" ]]; then
+    export CGO_ENABLED=1
+    export CC=arm-linux-gnueabi-gcc
+  elif [[ ${platform} == "linux/arm64" ]]; then
+    export CGO_ENABLED=1
+    export CC=aarch64-linux-gnu-gcc
+  elif [[ ${platform} == "linux/ppc64le" ]]; then
+    export CGO_ENABLED=1
+    export CC=powerpc64le-linux-gnu-gcc
+  fi
 }
 
 kube::golang::unset_platform_envs() {
   unset GOOS
   unset GOARCH
+  unset CGO_ENABLED
+  unset CC
 }
 
 # Create the GOPATH tree under $KUBE_OUTPUT