Update supported gke version for create-gke-cluster target
@@ -630,7 +630,7 @@ delete-kind-cluster: build/toolchain/bin/kind$(EXE_EXTENSION) build/toolchain/bi
create-cluster-role-binding:
$(KUBECTL) create clusterrolebinding myname-cluster-admin-binding --clusterrole=cluster-admin --user=$(GCLOUD_ACCOUNT_EMAIL)
-create-gke-cluster: GKE_VERSION = 1.14.10-gke.45 # gcloud beta container get-server-config --zone us-west1-a
+create-gke-cluster: GKE_VERSION = 1.15.12-gke.20 # gcloud beta container get-server-config --zone us-west1-a
create-gke-cluster: GKE_CLUSTER_SHAPE_FLAGS = --machine-type n1-standard-4 --enable-autoscaling --min-nodes 1 --num-nodes 2 --max-nodes 10 --disk-size 50
create-gke-cluster: GKE_FUTURE_COMPAT_FLAGS = --no-enable-basic-auth --no-issue-client-certificate --enable-ip-alias --metadata disable-legacy-endpoints=true --enable-autoupgrade
create-gke-cluster: build/toolchain/bin/kubectl$(EXE_EXTENSION) gcloud
