Merge pull request #6998 from zmerlynn/make_reboot_work

Make reboots work on GCE/GKE

cluster/gce/configure-vm.sh

@@ -134,7 +134,9 @@ install-salt() {
   URL_BASE="https://storage.googleapis.com/kubernetes-release/salt"
 
   for deb in "${DEBS[@]}"; do
-    download-or-bust "${URL_BASE}/${deb}"
+    if [ ! -e "${deb}" ]; then
+      download-or-bust "${URL_BASE}/${deb}"
+    fi
   done
 
   # Based on
@@ -152,7 +154,7 @@ EOF
 
   for deb in "${DEBS[@]}"; do
     echo "== Installing ${deb}, ignore dependency complaints (will fix later) =="
-    dpkg --force-depends -i "${deb}"
+    dpkg --skip-same-version --force-depends -i "${deb}"
   done
 
   # This will install any of the unmet dependencies from above.
@@ -172,6 +174,7 @@ EOF
 stop-salt-minion() {
   # This ensures it on next reboot
   echo manual > /etc/init/salt-minion.override
+  update-rc.d salt-minion disable
 
   if service salt-minion status >/dev/null; then
     echo "salt-minion started in defiance of runlevel policy, aborting startup." >&2
@@ -205,18 +208,21 @@ mount-master-pd() {
   mkdir -p /mnt/master-pd/srv/kubernetes
   # Contains the cluster's initial config parameters and auth tokens
   mkdir -p /mnt/master-pd/srv/salt-overlay
-  ln -s /mnt/master-pd/var/etcd /var/etcd
-  ln -s /mnt/master-pd/srv/kubernetes /srv/kubernetes
-  ln -s /mnt/master-pd/srv/salt-overlay /srv/salt-overlay
+
+  ln -s -f /mnt/master-pd/var/etcd /var/etcd
+  ln -s -f /mnt/master-pd/srv/kubernetes /srv/kubernetes
+  ln -s -f /mnt/master-pd/srv/salt-overlay /srv/salt-overlay
 
   # This is a bit of a hack to get around the fact that salt has to run after the
   # PD and mounted directory are already set up. We can't give ownership of the
   # directory to etcd until the etcd user and group exist, but they don't exist
   # until salt runs if we don't create them here. We could alternatively make the
   # permissions on the directory more permissive, but this seems less bad.
-  useradd -s /sbin/nologin -d /var/etcd etcd
-  chown etcd /mnt/master-pd/var/etcd
-  chgrp etcd /mnt/master-pd/var/etcd
+  if ! id etcd &>/dev/null; then
+    useradd -s /sbin/nologin -d /var/etcd etcd
+  fi
+  chown -R etcd /mnt/master-pd/var/etcd
+  chgrp -R etcd /mnt/master-pd/var/etcd
 }
 
 # Create the overlay files for the salt tree.  We create these in a separate
@@ -282,6 +288,14 @@ function create-salt-auth() {
 }
 
 function download-release() {
+  # TODO(zmerlynn): We should optimize for the reboot case here, but
+  # unlike the .debs, we don't have version information in the
+  # filenames here, nor do the URLs even provide useful information in
+  # the dev environment case (because they're just a project
+  # bucket). We should probably push a hash into the kube-env, and
+  # store it when we download, and then when it's different infer that
+  # a push occurred (otherwise it's a simple reboot).
+
   echo "Downloading binary release tar ($SERVER_BINARY_TAR_URL)"
   download-or-bust "$SERVER_BINARY_TAR_URL"
 

cluster/gce/util.sh

@@ -390,20 +390,23 @@ function create-node-template {
 
 # Robustly try to add metadata on an instance.
 # $1: The name of the instace.
-# $2: The metadata key=value pair to add.
+# $2...$n: The metadata key=value pairs to add.
 function add-instance-metadata {
+  local -r instance=$1
+  shift 1
+  local -r kvs=( "$@" )
   detect-project
   local attempt=0
   while true; do
-    if ! gcloud compute instances add-metadata "$1" \
+    if ! gcloud compute instances add-metadata "${instance}" \
       --project "${PROJECT}" \
       --zone "${ZONE}" \
-      --metadata "$2"; then
+      --metadata "${kvs[@]}"; then
         if (( attempt > 5 )); then
-          echo -e "${color_red}Failed to add instance metadata in $1 ${color_norm}"
+          echo -e "${color_red}Failed to add instance metadata in ${instance} ${color_norm}"
           exit 2
         fi
-        echo -e "${color_yellow}Attempt $(($attempt+1)) failed to add metadata in $1. Retrying.${color_norm}"
+        echo -e "${color_yellow}Attempt $(($attempt+1)) failed to add metadata in ${instance}. Retrying.${color_norm}"
         attempt=$(($attempt+1))
     else
         break
@@ -412,21 +415,25 @@ function add-instance-metadata {
 }
 
 # Robustly try to add metadata on an instance, from a file.
-# $1: The name of the instace.
-# $2: The metadata key=file pair to add.
+# $1: The name of the instance.
+# $2...$n: The metadata key=file pairs to add.
 function add-instance-metadata-from-file {
+  local -r instance=$1
+  shift 1
+  local -r kvs=( "$@" )
   detect-project
   local attempt=0
   while true; do
-    if ! gcloud compute instances add-metadata "$1" \
+    echo "${kvs[@]}"
+    if ! gcloud compute instances add-metadata "${instance}" \
       --project "${PROJECT}" \
       --zone "${ZONE}" \
-      --metadata-from-file "$2"; then
+      --metadata-from-file "${kvs[@]}"; then
         if (( attempt > 5 )); then
-          echo -e "${color_red}Failed to add instance metadata in $1 ${color_norm}"
+          echo -e "${color_red}Failed to add instance metadata in ${instance} ${color_norm}"
           exit 2
         fi
-        echo -e "${color_yellow}Attempt $(($attempt+1)) failed to add metadata in $1. Retrying.${color_norm}"
+        echo -e "${color_yellow}Attempt $(($attempt+1)) failed to add metadata in ${instance}. Retrying.${color_norm}"
         attempt=$(($attempt+1))
     else
         break
@@ -851,8 +858,10 @@ function kube-push {
   find-release-tars
   upload-server-tars
 
+  echo "Updating master metadata ..."
   write-master-env
-  add-instance-metadata-from-file "${KUBE_MASTER}" "kube-env=${KUBE_TEMP}/master-kube-env.yaml"
+  add-instance-metadata-from-file "${KUBE_MASTER}" "kube-env=${KUBE_TEMP}/master-kube-env.yaml" "startup-script=${KUBE_ROOT}/cluster/gce/configure-vm.sh"
+
   echo "Pushing to master (log at ${OUTPUT}/kube-push-${KUBE_MASTER}.log) ..."
   cat ${KUBE_ROOT}/cluster/gce/configure-vm.sh | gcloud compute ssh --ssh-flag="-o LogLevel=quiet" --project "${PROJECT}" --zone "${ZONE}" "${KUBE_MASTER}" --command "sudo bash -s -- --push" &> ${OUTPUT}/kube-push-"${KUBE_MASTER}".log
 
@@ -897,7 +906,7 @@ function kube-update-nodes() {
   echo "Updating node metadata... "
   write-node-env
   for (( i=0; i<${#MINION_NAMES[@]}; i++)); do
-    add-instance-metadata-from-file "${MINION_NAMES[$i]}" "kube-env=${KUBE_TEMP}/node-kube-env.yaml" &
+    add-instance-metadata-from-file "${MINION_NAMES[$i]}" "kube-env=${KUBE_TEMP}/node-kube-env.yaml" "startup-script=${KUBE_ROOT}/cluster/gce/configure-vm.sh" &
   done
   wait-for-jobs
   echo "Done"