GCE: enable downloading and staging of the node binaries

Currently, only kubernetes-server-linux-<arch>.tar.gz will be downloaded
and staged for tests. It is not possible to test a cluster where the
platform/arch of the nodes differs from that of the master
control-plane. This changes allows downloading and staging node
binaries, in addition to the existing server binaries.

cluster/gce/util.sh

@@ -248,16 +248,21 @@ function set-preferred-region() {
 # Assumed vars:
 #   PROJECT
 #   SERVER_BINARY_TAR
+#   NODE_BINARY_TAR (optional)
 #   KUBE_MANIFESTS_TAR
 #   ZONE
 # Vars set:
 #   SERVER_BINARY_TAR_URL
 #   SERVER_BINARY_TAR_HASH
+#   NODE_BINARY_TAR_URL
+#   NODE_BINARY_TAR_HASH
 #   KUBE_MANIFESTS_TAR_URL
 #   KUBE_MANIFESTS_TAR_HASH
-function upload-server-tars() {
+function upload-tars() {
   SERVER_BINARY_TAR_URL=
   SERVER_BINARY_TAR_HASH=
+  NODE_BINARY_TAR_URL=
+  NODE_BINARY_TAR_HASH=
   KUBE_MANIFESTS_TAR_URL=
   KUBE_MANIFESTS_TAR_HASH=
 
@@ -279,11 +284,16 @@ function upload-server-tars() {
   fi
 
   SERVER_BINARY_TAR_HASH=$(sha1sum-file "${SERVER_BINARY_TAR}")
+
+  if [[ -n "${NODE_BINARY_TAR:-}" ]]; then
+    NODE_BINARY_TAR_HASH=$(sha1sum-file "${NODE_BINARY_TAR}")
+  fi
   if [[ -n "${KUBE_MANIFESTS_TAR:-}" ]]; then
     KUBE_MANIFESTS_TAR_HASH=$(sha1sum-file "${KUBE_MANIFESTS_TAR}")
   fi
 
   local server_binary_tar_urls=()
+  local node_binary_tar_urls=()
   local kube_manifest_tar_urls=()
 
   for region in "${PREFERRED_REGION[@]}"; do
@@ -301,12 +311,20 @@ function upload-server-tars() {
 
     local staging_path="${staging_bucket}/${INSTANCE_PREFIX}-devel"
 
-    echo "+++ Staging server tars to Google Storage: ${staging_path}"
+    echo "+++ Staging tars to Google Storage: ${staging_path}"
     local server_binary_gs_url="${staging_path}/${SERVER_BINARY_TAR##*/}"
     copy-to-staging "${staging_path}" "${server_binary_gs_url}" "${SERVER_BINARY_TAR}" "${SERVER_BINARY_TAR_HASH}"
 
+    if [[ -n "${NODE_BINARY_TAR:-}" ]]; then
+      local node_binary_gs_url="${staging_path}/${NODE_BINARY_TAR##*/}"
+      copy-to-staging "${staging_path}" "${node_binary_gs_url}" "${NODE_BINARY_TAR}" "${NODE_BINARY_TAR_HASH}"
+    fi
+
     # Convert from gs:// URL to an https:// URL
     server_binary_tar_urls+=("${server_binary_gs_url/gs:\/\//https://storage.googleapis.com/}")
+    if [[ -n "${NODE_BINARY_TAR:-}" ]]; then
+      node_binary_tar_urls+=("${node_binary_gs_url/gs:\/\//https://storage.googleapis.com/}")
+    fi
     if [[ -n "${KUBE_MANIFESTS_TAR:-}" ]]; then
       local kube_manifests_gs_url="${staging_path}/${KUBE_MANIFESTS_TAR##*/}"
       copy-to-staging "${staging_path}" "${kube_manifests_gs_url}" "${KUBE_MANIFESTS_TAR}" "${KUBE_MANIFESTS_TAR_HASH}"
@@ -316,6 +334,9 @@ function upload-server-tars() {
   done
 
   SERVER_BINARY_TAR_URL=$(join_csv "${server_binary_tar_urls[@]}")
+  if [[ -n "${NODE_BINARY_TAR:-}" ]]; then
+    NODE_BINARY_TAR_URL=$(join_csv "${node_binary_tar_urls[@]}")
+  fi
   if [[ -n "${KUBE_MANIFESTS_TAR:-}" ]]; then
     KUBE_MANIFESTS_TAR_URL=$(join_csv "${kube_manifests_tar_urls[@]}")
   fi
@@ -436,7 +457,7 @@ function tars_from_version() {
 
   if [[ -z "${KUBE_VERSION-}" ]]; then
     find-release-tars
-    upload-server-tars
+    upload-tars
   elif [[ ${KUBE_VERSION} =~ ${KUBE_RELEASE_VERSION_REGEX} ]]; then
     SERVER_BINARY_TAR_URL="https://storage.googleapis.com/kubernetes-release/release/${KUBE_VERSION}/kubernetes-server-linux-amd64.tar.gz"
     # TODO: Clean this up.
@@ -1756,7 +1777,7 @@ function kube-up() {
 
   # Make sure we have the tar files staged on Google Storage
   find-release-tars
-  upload-server-tars
+  upload-tars
 
   # ensure that environmental variables specifying number of migs to create
   set_num_migs

cluster/get-kube-binaries.sh

@@ -161,6 +161,11 @@ DOWNLOAD_URL_PREFIX="${KUBERNETES_RELEASE_URL}/${KUBE_VERSION}"
 SERVER_PLATFORM="linux"
 SERVER_ARCH="${KUBERNETES_SERVER_ARCH:-amd64}"
 SERVER_TAR="kubernetes-server-${SERVER_PLATFORM}-${SERVER_ARCH}.tar.gz"
+if [[ -n "${KUBERNETES_NODE_PLATFORM-}" ]]; then
+  NODE_PLATFORM="${KUBERNETES_NODE_PLATFORM}"
+  NODE_ARCH="${KUBERNETES_NODE_ARCH:-amd64}"
+  NODE_TAR="kubernetes-node-${NODE_PLATFORM}-${NODE_ARCH}.tar.gz"
+fi
 
 detect_client_info
 CLIENT_TAR="kubernetes-client-${CLIENT_PLATFORM}-${CLIENT_ARCH}.tar.gz"
@@ -186,6 +191,12 @@ if [[ ! -x "${KUBE_ROOT}/platforms/${CLIENT_PLATFORM}/${CLIENT_ARCH}/kubectl" ]]
   echo "Will download and extract ${CLIENT_TAR} from ${DOWNLOAD_URL_PREFIX}"
 fi
 
+DOWNLOAD_NODE_TAR=false
+if [[ -n "${NODE_TAR:-}" ]]; then
+  DOWNLOAD_NODE_TAR=true
+  echo "Will download and extract ${NODE_TAR} from ${DOWNLOAD_URL_PREFIX}"
+fi
+
 TESTS_TAR="kubernetes-test.tar.gz"
 DOWNLOAD_TESTS_TAR=false
 if [[ -n "${KUBERNETES_DOWNLOAD_TESTS-}" ]]; then
@@ -213,6 +224,10 @@ if "${DOWNLOAD_SERVER_TAR}"; then
   download_tarball "${KUBE_ROOT}/server" "${SERVER_TAR}"
 fi
 
+if "${DOWNLOAD_NODE_TAR}"; then
+  download_tarball "${KUBE_ROOT}/node" "${NODE_TAR}"
+fi
+
 if "${DOWNLOAD_CLIENT_TAR}"; then
   download_tarball "${KUBE_ROOT}/client" "${CLIENT_TAR}"
   extract_arch_tarball "${KUBE_ROOT}/client/${CLIENT_TAR}" "${CLIENT_PLATFORM}" "${CLIENT_ARCH}"

cluster/get-kube.sh

@@ -37,6 +37,17 @@
 #    * arm
 #    * arm64
 #
+#  Set KUBERNETES_NODE_PLATFORM to choose the platform for which to download
+#  the node binaries. If not set (the default) no node binaries will be
+#  downloaded. The options are:
+#    * linux
+#    * windows
+#
+#  Set KUBERNETES_NODE_ARCH to choose the node architecture to download:
+#    * amd64 [default]
+#    * arm
+#    * arm64
+#
 #  Set KUBERNETES_SKIP_DOWNLOAD to skip downloading a release.
 #  Set KUBERNETES_SKIP_CONFIRM to skip the installation confirmation prompt.
 #  Set KUBERNETES_SKIP_CREATE_CLUSTER to skip starting a cluster.