Merge pull request #44363 from bowei/use-auto-net

Automatic merge from submit-queue

Use auto mode networks instead of legacy networks in GCP

Use of the --range flag creates legacy networks in GCP.

Legacy networks will not support new GCP features.

```release-note
NONE
```

cluster/gce/util.sh

@@ -695,7 +695,7 @@ function create-network() {
     echo "Creating new network: ${NETWORK}"
     # The network needs to be created synchronously or we have a race. The
     # firewalls can be added concurrent with instance creation.
-    gcloud compute networks create --project "${PROJECT}" "${NETWORK}" --range "10.240.0.0/16"
+    gcloud compute networks create --project "${PROJECT}" "${NETWORK}" --mode=auto
   fi
 
   if ! gcloud compute firewall-rules --project "${PROJECT}" describe "${CLUSTER_NAME}-default-internal-master" &>/dev/null; then

cluster/gke/config-common.sh

@@ -23,7 +23,6 @@ NUM_NODES="${NUM_NODES:-3}"
 ADDITIONAL_ZONES="${ADDITIONAL_ZONES:-}"
 CLUSTER_API_VERSION="${CLUSTER_API_VERSION:-}"
 NETWORK="${NETWORK:-default}"
-NETWORK_RANGE="${NETWORK_RANGE:-10.240.0.0/16}"
 FIREWALL_SSH="${FIREWALL_SSH:-${NETWORK}-allow-ssh}"
 GCLOUD="${GCLOUD:-gcloud}"
 CMD_GROUP="${CMD_GROUP:-}"

cluster/gke/util.sh

@@ -142,7 +142,7 @@ function kube-up() {
   # Make the specified network if we need to.
   if ! "${GCLOUD}" compute networks --project "${PROJECT}" describe "${NETWORK}" &>/dev/null; then
     echo "Creating new network: ${NETWORK}" >&2
-    with-retry 3 "${GCLOUD}" compute networks create "${NETWORK}" --project="${PROJECT}" --range "${NETWORK_RANGE}"
+    with-retry 3 "${GCLOUD}" compute networks create "${NETWORK}" --project="${PROJECT}" --mode=auto
   else
     echo "... Using network: ${NETWORK}" >&2
   fi