Set up ENABLE_POD_PRIORITY env for GCE and common.sh

cluster/common.sh

@@ -672,6 +672,7 @@ GCE_API_ENDPOINT: $(yaml-quote ${GCE_API_ENDPOINT:-})
 PROMETHEUS_TO_SD_ENDPOINT: $(yaml-quote ${PROMETHEUS_TO_SD_ENDPOINT:-})
 PROMETHEUS_TO_SD_PREFIX: $(yaml-quote ${PROMETHEUS_TO_SD_PREFIX:-})
 ENABLE_PROMETHEUS_TO_SD: $(yaml-quote ${ENABLE_PROMETHEUS_TO_SD:-false})
+ENABLE_POD_PRIORITY: $(yaml-quote ${ENABLE_POD_PRIORITY:-})
 EOF
   if [ -n "${KUBELET_PORT:-}" ]; then
     cat >>$file <<EOF

cluster/gce/config-default.sh

@@ -301,3 +301,9 @@ ENABLE_PROMETHEUS_TO_SD="${ENABLE_PROMETHEUS_TO_SD:-false}"
 # TODO(#51292): Make kube-proxy Daemonset default and remove the configuration here.
 # Optional: Run kube-proxy as a DaemonSet if set to true, run as static pods otherwise.
 KUBE_PROXY_DAEMONSET="${KUBE_PROXY_DAEMONSET:-false}" # true, false
+
+# Optional: enable pod priority
+ENABLE_POD_PRIORITY="${ENABLE_POD_PRIORITY:-}"
+if [[ "${ENABLE_POD_PRIORITY}" == "true" ]]; then
+    FEATURE_GATES="${FEATURE_GATES},PodPriority=true"
+fi

cluster/gce/config-test.sh

@@ -360,3 +360,9 @@ ENABLE_PROMETHEUS_TO_SD="${ENABLE_PROMETHEUS_TO_SD:-true}"
 # TODO(#51292): Make kube-proxy Daemonset default and remove the configuration here.
 # Optional: Run kube-proxy as a DaemonSet if set to true, run as static pods otherwise.
 KUBE_PROXY_DAEMONSET="${KUBE_PROXY_DAEMONSET:-false}" # true, false
+
+# Optional: enable pod priority
+ENABLE_POD_PRIORITY="${ENABLE_POD_PRIORITY:-}"
+if [[ "${ENABLE_POD_PRIORITY}" == "true" ]]; then
+    FEATURE_GATES="${FEATURE_GATES},PodPriority=true"
+fi

cluster/gce/configure-vm.sh

@@ -447,6 +447,7 @@ initial_etcd_cluster: '$(echo "${INITIAL_ETCD_CLUSTER:-}" | sed -e "s/'/''/g")'
 initial_etcd_cluster_state: '$(echo "${INITIAL_ETCD_CLUSTER_STATE:-}" | sed -e "s/'/''/g")'
 ca_cert_bundle_path: '$(echo "${CA_CERT_BUNDLE_PATH:-}" | sed -e "s/'/''/g")'
 hostname: $(hostname -s)
+enable_pod_priority: '$(echo "$ENABLE_POD_PRIORITY" | sed -e "s/'/''/g")'
 enable_default_storage_class: '$(echo "$ENABLE_DEFAULT_STORAGE_CLASS" | sed -e "s/'/''/g")'
 kube_proxy_daemonset: '$(echo "$KUBE_PROXY_DAEMONSET" | sed -e "s/'/''/g")'
 EOF