change shell var MINION_SCOPES to user setable

Because bash arrays may not be environment variables
 (see: <https://stackoverflow.com/questions/5564418/exporting-an-array-in-bash-script>)
 we have to change the MINION_SCOPES array to a string
* prefers aliases instead of full URLs for scopes

tested under GKE, needs GCE testing

Close #10458

cluster/gce/config-default.sh

@@ -41,7 +41,8 @@ MASTER_TAG="${INSTANCE_PREFIX}-master"
 MINION_TAG="${INSTANCE_PREFIX}-minion"
 MASTER_IP_RANGE="${MASTER_IP_RANGE:-10.246.0.0/24}"
 CLUSTER_IP_RANGE="${CLUSTER_IP_RANGE:-10.244.0.0/16}"
-MINION_SCOPES=("storage-ro" "compute-rw" "https://www.googleapis.com/auth/monitoring" "https://www.googleapis.com/auth/logging.write")
+MINION_SCOPES="${MINION_SCOPES:-compute-rw,monitoring,logging-write,storage-ro}"
+
 # Increase the sleep interval value if concerned about API rate limits. 3, in seconds, is the default.
 POLL_SLEEP_INTERVAL=3
 SERVICE_CLUSTER_IP_RANGE="10.0.0.0/16"  # formerly PORTAL_NET

cluster/gce/config-test.sh

@@ -42,7 +42,7 @@ MASTER_TAG="${INSTANCE_PREFIX}-master"
 MINION_TAG="${INSTANCE_PREFIX}-minion"
 CLUSTER_IP_RANGE="${CLUSTER_IP_RANGE:-10.245.0.0/16}"
 MASTER_IP_RANGE="${MASTER_IP_RANGE:-10.246.0.0/24}"
-MINION_SCOPES=("storage-ro" "compute-rw" "https://www.googleapis.com/auth/logging.write" "https://www.googleapis.com/auth/monitoring")
+MINION_SCOPES="${MINION_SCOPES:-compute-rw,monitoring,logging-write,storage-ro}"
 # Increase the sleep interval value if concerned about API rate limits. 3, in seconds, is the default.
 POLL_SLEEP_INTERVAL=3
 SERVICE_CLUSTER_IP_RANGE="10.0.0.0/16"  # formerly PORTAL_NET

cluster/gce/coreos/helper.sh

@@ -140,7 +140,7 @@ function create-node-instance-template {
   if [[ -n ${1:-} ]]; then
     suffix="-${1}"
   fi
-   create-node-template "${NODE_INSTANCE_PREFIX}-template${suffix}" "${scope_flags[*]}" \
+   create-node-template "${NODE_INSTANCE_PREFIX}-template${suffix}" "${scope_flags}" \
     "kube-env=${KUBE_TEMP}/node-kube-env.yaml" \
     "user-data=${KUBE_ROOT}/cluster/gce/coreos/node.yaml"
 }

cluster/gce/debian/helper.sh

@@ -120,7 +120,7 @@ function create-node-instance-template {
   if [[ -n ${1:-} ]]; then
     suffix="-${1}"
   fi
-  create-node-template "${NODE_INSTANCE_PREFIX}-template${suffix}" "${scope_flags[*]}" \
+  create-node-template "${NODE_INSTANCE_PREFIX}-template${suffix}" "${scope_flags}" \
     "startup-script=${KUBE_ROOT}/cluster/gce/configure-vm.sh" \
     "kube-env=${KUBE_TEMP}/node-kube-env.yaml"
 }

cluster/gce/upgrade.sh

@@ -178,11 +178,11 @@ function prepare-node-upgrade() {
   detect-minion-names
 
   # TODO(mbforbes): Refactor setting scope flags.
-  local -a scope_flags=()
-  if (( "${#MINION_SCOPES[@]}" > 0 )); then
-    scope_flags=("--scopes" "$(join_csv ${MINION_SCOPES[@]})")
+  local scope_flags=
+  if [ -n "${MINION_SCOPES}" ]; then
+    scope_flags="--scopes ${MINION_SCOPES}"
   else
-    scope_flags=("--no-scopes")
+    scope_flags="--no-scopes"
   fi
 
   # Get required node env vars from exiting template.

cluster/gce/util.sh

@@ -685,11 +685,11 @@ function kube-up {
   echo "Creating minions."
 
   # TODO(mbforbes): Refactor setting scope flags.
-  local -a scope_flags=()
-  if (( "${#MINION_SCOPES[@]}" > 0 )); then
-    scope_flags=("--scopes" "$(join_csv ${MINION_SCOPES[@]})")
+  local scope_flags=
+  if [ -n "${MINION_SCOPES}" ]; then
+    scope_flags="--scopes ${MINION_SCOPES}"
   else
-    scope_flags=("--no-scopes")
+    scope_flags="--no-scopes"
   fi
 
   write-node-env
@@ -1007,11 +1007,11 @@ function prepare-push() {
     write-node-env
 
     # TODO(mbforbes): Refactor setting scope flags.
-    local -a scope_flags=()
-    if (( "${#MINION_SCOPES[@]}" > 0 )); then
-      scope_flags=("--scopes" "${MINION_SCOPES[@]}")
+    local scope_flags=
+    if [ -n "${MINION_SCOPES}" ]; then
+      scope_flags="--scopes ${MINION_SCOPES}"
     else
-      scope_flags=("--no-scopes")
+      scope_flags="--no-scopes"
     fi
 
     # Ugly hack: Since it is not possible to delete instance-template that is currently

cluster/gke/config-common.sh

@@ -30,6 +30,7 @@ GCLOUD="${GCLOUD:-gcloud}"
 CMD_GROUP="${CMD_GROUP:-alpha}"
 GCLOUD_CONFIG_DIR="${GCLOUD_CONFIG_DIR:-${HOME}/.config/gcloud/kubernetes}"
 ENABLE_CLUSTER_DNS=false
+MINION_SCOPES="${MINION_SCOPES:-"compute-rw,storage-ro"}"
 
 # This is a hack, but I keep setting this when I run commands manually, and
 # then things grossly fail during normal runs because cluster/kubecfg.sh and

cluster/gke/util.sh

@@ -112,6 +112,7 @@ function verify-prereqs() {
 #   ZONE
 #   CLUSTER_API_VERSION (optional)
 #   NUM_MINIONS
+#   MINION_SCOPES
 function kube-up() {
   echo "... in kube-up()" >&2
   detect-project >&2
@@ -142,6 +143,7 @@ function kube-up() {
     "--project=${PROJECT}"
     "--num-nodes=${NUM_MINIONS}"
     "--network=${NETWORK}"
+    "--scopes=${MINION_SCOPES}"
   )
   if [[ ! -z "${DOGFOOD_GCLOUD:-}" ]]; then
     create_args+=("--cluster-version=${CLUSTER_API_VERSION:-}")