Add csi-proxy installation into node setup script

This PR follows the same step to install and start csi-proxy as kubelet
binary

cluster/gce/config-common.sh

@@ -159,3 +159,7 @@ export WINDOWS_BOOTSTRAP_KUBECONFIG_FILE="${WINDOWS_K8S_DIR}\kubelet.bootstrap-k
 export WINDOWS_KUBEPROXY_KUBECONFIG_FILE="${WINDOWS_K8S_DIR}\kubeproxy.kubeconfig"
 # Pause container image for Windows container.
 export WINDOWS_INFRA_CONTAINER="gcr.io/gke-release/pause-win:1.2.1"
+# Storage Path for csi-proxy. csi-proxy only needs to be installed for Windows.
+export CSI_PROXY_STORAGE_PATH="https://storage.googleapis.com/gke-release/csi-proxy"
+# Version for csi-proxy
+export CSI_PROXY_VERSION="v0.1.0-gke.1"

cluster/gce/util.sh

@@ -280,7 +280,6 @@ function set-preferred-region() {
 # Assumed vars:
 #   PROJECT
 #   SERVER_BINARY_TAR
-#   NODE_BINARY_TAR (optional)
 #   KUBE_MANIFESTS_TAR
 #   ZONE
 # Vars set:
@@ -1543,6 +1542,8 @@ function build-windows-kube-env {
 WINDOWS_NODE_INSTANCE_PREFIX: $(yaml-quote ${WINDOWS_NODE_INSTANCE_PREFIX})
 NODE_BINARY_TAR_URL: $(yaml-quote ${NODE_BINARY_TAR_URL})
 NODE_BINARY_TAR_HASH: $(yaml-quote ${NODE_BINARY_TAR_HASH})
+CSI_PROXY_STORAGE_PATH: $(yaml-quote ${CSI_PROXY_STORAGE_PATH})
+CSI_PROXY_VERSION: $(yaml-quote ${CSI_PROXY_VERSION})
 K8S_DIR: $(yaml-quote ${WINDOWS_K8S_DIR})
 NODE_DIR: $(yaml-quote ${WINDOWS_NODE_DIR})
 LOGS_DIR: $(yaml-quote ${WINDOWS_LOGS_DIR})

cluster/gce/windows/configure.ps1

@@ -136,6 +136,8 @@ try {
   Setup-ContainerRuntime
   DownloadAndInstall-AuthPlugin
   DownloadAndInstall-KubernetesBinaries
+  DownloadAndInstall-CSIProxyBinaries
+  Start-CSIProxy
   Create-NodePki
   Create-KubeletKubeconfig
   Create-KubeproxyKubeconfig

cluster/gce/windows/k8s-node-setup.psm1

@@ -253,6 +253,8 @@ function Set-EnvironmentVars {
     "CNI_CONFIG_DIR" = ${kube_env}['CNI_CONFIG_DIR']
     "WINDOWS_CNI_STORAGE_PATH" = ${kube_env}['WINDOWS_CNI_STORAGE_PATH']
     "WINDOWS_CNI_VERSION" = ${kube_env}['WINDOWS_CNI_VERSION']
+    "CSI_PROXY_STORAGE_PATH" = ${kube_env}['CSI_PROXY_STORAGE_PATH']
+    "CSI_PROXY_VERSION" = ${kube_env}['CSI_PROXY_VERSION']
     "PKI_DIR" = ${kube_env}['PKI_DIR']
     "CA_FILE_PATH" = ${kube_env}['CA_FILE_PATH']
     "KUBELET_CONFIG" = ${kube_env}['KUBELET_CONFIG_FILE']
@@ -386,6 +388,33 @@ function DownloadAndInstall-KubernetesBinaries {
   Remove-Item -Force -Recurse $tmp_dir
 }
 
+# Downloads the csi-proxy binaries from kube-env's CSI_PROXY_STORAGE_PATH and
+# CSI_PROXY_VERSION, and then puts them in a subdirectory of $env:NODE_DIR. 
+# Note: for now the installation is skipped for non-test clusters. Will be
+# installed for all cluster after tests pass.
+# Required ${kube_env} keys:
+#   CSI_PROXY_STORAGE_PATH and CSI_PROXY_VERSION
+function DownloadAndInstall-CSIProxyBinaries {
+  if (Test-IsTestCluster $kube_env) {
+    if (ShouldWrite-File ${env:NODE_DIR}\csi-proxy.exe) {
+      $tmp_dir = 'C:\k8s_tmp'
+      New-Item -Force -ItemType 'directory' $tmp_dir | Out-Null
+      $filename = 'csi-proxy.exe'
+      $urls = "${env:CSI_PROXY_STORAGE_PATH}/${env:CSI_PROXY_VERSION}/$filename"
+      MustDownload-File -OutFile $tmp_dir\$filename -URLs $urls
+      Move-Item -Force $tmp_dir\$filename ${env:NODE_DIR}\$filename
+      # Clean up the temporary directory
+      Remove-Item -Force -Recurse $tmp_dir
+    }
+  }
+}
+
+# TODO(jingxu97): Make csi-proxy.exe as a service similar to kubelet.exe
+function Start-CSIProxy {
+  Log-Output 'Starting CSI Proxy'
+  Start-Process "${env:NODE_DIR}\csi-proxy.exe"
+}
+
 # TODO(pjh): this is copied from
 # https://github.com/Microsoft/SDN/blob/master/Kubernetes/windows/start-kubelet.ps1#L98.
 # See if there's a way to fetch or construct the "management subnet" so that
@@ -901,7 +930,6 @@ Import-Module -Name $modulePath'.replace('K8S_DIR', ${env:K8S_DIR})
     }
     Copy-Item ${env:K8S_DIR}\diskutil.exe -Destination "C:\Windows\system32"
   }
-
 }
 
 # Setup cni network. This function supports both Docker and containerd.