fix shellcheck failures of cluster/gce/upgrade-aliases.sh

Author: SataQiu

cluster/gce/upgrade-aliases.sh

@@ -26,7 +26,7 @@ if [[ "${KUBERNETES_PROVIDER:-gce}" != "gce" ]]; then
   exit 1
 fi
 
-KUBE_ROOT=$(dirname "${BASH_SOURCE}")/../..
+KUBE_ROOT=$(dirname "${BASH_SOURCE[0]}")/../..
 source "${KUBE_ROOT}/hack/lib/util.sh"
 source "${KUBE_ROOT}/cluster/kube-util.sh"
 
@@ -35,8 +35,9 @@ source "${KUBE_ROOT}/cluster/kube-util.sh"
 # Assumed vars:
 #   PROJECT
 function get-k8s-node-routes-count() {
-  local k8s_node_routes_count=$(gcloud compute routes list \
-    --project=${PROJECT} --filter='description=k8s-node-route' \
+  local k8s_node_routes_count
+  k8s_node_routes_count=$(gcloud compute routes list \
+    --project="${PROJECT}" --filter='description=k8s-node-route' \
     --format='value(name)' | wc -l)
   echo -n "${k8s_node_routes_count}"
 }
@@ -50,11 +51,12 @@ function get-k8s-node-routes-count() {
 # Vars set:
 #  IP_ALIAS_SUBNETWORK
 function detect-k8s-subnetwork() {
-  local subnetwork_url=$(gcloud compute instances describe \
-    ${KUBE_MASTER} --project=${PROJECT} --zone=${ZONE} \
+  local subnetwork_url
+  subnetwork_url=$(gcloud compute instances describe \
+    "${KUBE_MASTER}" --project="${PROJECT}" --zone="${ZONE}" \
     --format='value(networkInterfaces[0].subnetwork)')
   if [[ -n ${subnetwork_url} ]]; then
-    IP_ALIAS_SUBNETWORK=$(echo ${subnetwork_url##*/})
+    IP_ALIAS_SUBNETWORK=${subnetwork_url##*/}
   fi
 }
 
@@ -69,21 +71,24 @@ function detect-k8s-subnetwork() {
 function set-allow-subnet-cidr-routes-overlap() {
   local allow_subnet_cidr_routes_overlap
   allow_subnet_cidr_routes_overlap=$(gcloud compute networks subnets \
-    describe ${IP_ALIAS_SUBNETWORK} --project=${PROJECT} --region=${REGION} \
+    describe "${IP_ALIAS_SUBNETWORK}" --project="${PROJECT}" --region="${REGION}" \
     --format='value(allowSubnetCidrRoutesOverlap)')
   local allow_overlap=$1
-  if [ ${allow_subnet_cidr_routes_overlap,,} = ${allow_overlap} ]; then
+  if [ "${allow_subnet_cidr_routes_overlap,,}" = "${allow_overlap}" ]; then
     echo "Subnet ${IP_ALIAS_SUBNETWORK}'s allowSubnetCidrRoutesOverlap is already set as $1"
     return
   fi
 
   echo "Setting subnet \"${IP_ALIAS_SUBNETWORK}\" allowSubnetCidrRoutesOverlap to $1"
-  local fingerprint=$(gcloud compute networks subnets describe \
-    ${IP_ALIAS_SUBNETWORK} --project=${PROJECT} --region=${REGION} \
+  local fingerprint
+  fingerprint=$(gcloud compute networks subnets describe \
+    "${IP_ALIAS_SUBNETWORK}" --project="${PROJECT}" --region="${REGION}" \
     --format='value(fingerprint)')
-  local access_token=$(gcloud auth print-access-token)
+  local access_token
+  access_token=$(gcloud auth print-access-token)
   local request="{\"allowSubnetCidrRoutesOverlap\":$1, \"fingerprint\":\"${fingerprint}\"}"
-  local subnetwork_url="${GCE_API_ENDPOINT}projects/${PROJECT}/regions/${REGION}/subnetworks/${IP_ALIAS_SUBNETWORK}"
+  local subnetwork_url
+  subnetwork_url="${GCE_API_ENDPOINT}projects/${PROJECT}/regions/${REGION}/subnetworks/${IP_ALIAS_SUBNETWORK}"
   until curl -s --header "Content-Type: application/json" --header "Authorization: Bearer ${access_token}" \
     -X PATCH -d "${request}" "${subnetwork_url}" --output /dev/null; do
     printf "."
@@ -100,7 +105,8 @@ function set-allow-subnet-cidr-routes-overlap() {
 #   CLUSTER_IP_RANGE
 #   SERVICE_CLUSTER_IP_RANGE
 function add-k8s-subnet-secondary-ranges() {
-  local secondary_ranges=$(gcloud compute networks subnets describe "${IP_ALIAS_SUBNETWORK}" \
+  local secondary_ranges
+  secondary_ranges=$(gcloud compute networks subnets describe "${IP_ALIAS_SUBNETWORK}" \
     --project="${PROJECT}" --region="${REGION}" \
     --format='value(secondaryIpRanges)')
   if [[ "${secondary_ranges}" =~ "pods-default" && "${secondary_ranges}" =~ "services-default" ]]; then
@@ -109,8 +115,8 @@ function add-k8s-subnet-secondary-ranges() {
   fi
 
   echo "Adding secondary ranges: pods-default (${CLUSTER_IP_RANGE}), services-default (${SERVICE_CLUSTER_IP_RANGE})"
-  until gcloud compute networks subnets update ${IP_ALIAS_SUBNETWORK} \
-    --project=${PROJECT} --region=${REGION} \
+  until gcloud compute networks subnets update "${IP_ALIAS_SUBNETWORK}" \
+    --project="${PROJECT}" --region="${REGION}" \
     --add-secondary-ranges="pods-default=${CLUSTER_IP_RANGE},services-default=${SERVICE_CLUSTER_IP_RANGE}"; do
     printf "."
     sleep 1
@@ -124,9 +130,12 @@ function add-k8s-subnet-secondary-ranges() {
 function delete-k8s-node-routes() {
   local -a routes
   local -r batch=200
-  routes=( $(gcloud compute routes list \
-    --project=${PROJECT} --filter='description=k8s-node-route' \
-    --format='value(name)') )
+  routes=()
+  while IFS=$'\n' read -r route; do
+    routes+=( "${route}" )
+  done < <(gcloud compute routes list \
+    --project="${PROJECT}" --filter='description=k8s-node-route' \
+    --format='value(name)')
   while (( "${#routes[@]}" > 0 )); do
       echo Deleting k8s node routes "${routes[*]::${batch}}"
       gcloud compute routes delete --project "${PROJECT}" --quiet "${routes[@]::${batch}}"
@@ -145,7 +154,7 @@ fi
 echo "Found ${k8s_node_routes_count} K8s node routes. Proceeding to upgrade them to IP aliases based connectivity..."
 
 detect-k8s-subnetwork
-if [ -z ${IP_ALIAS_SUBNETWORK} ]; then
+if [ -z "${IP_ALIAS_SUBNETWORK}" ]; then
   echo "No k8s cluster subnetwork found. Exiting..."
   exit 1
 fi
@@ -165,7 +174,7 @@ export ETCD_IMAGE=3.3.10-0
 export ETCD_VERSION=3.3.10
 
 # Upgrade master with updated kube envs
-${KUBE_ROOT}/cluster/gce/upgrade.sh -M -l
+"${KUBE_ROOT}/cluster/gce/upgrade.sh" -M -l
 
 delete-k8s-node-routes
 set-allow-subnet-cidr-routes-overlap false

hack/.shellcheck_failures

@@ -10,7 +10,6 @@
 ./cluster/gce/gci/flexvolume_node_setup.sh
 ./cluster/gce/gci/health-monitor.sh
 ./cluster/gce/gci/master-helper.sh
-./cluster/gce/upgrade-aliases.sh
 ./cluster/gce/upgrade.sh
 ./cluster/gce/util.sh
 ./cluster/log-dump/log-dump.sh