Validating the Kubernetes cluster version

For Kustomize to function, Kubernetes cluster version 1.14.0 or later is required, since Kustomize support is only included with kubectl v.1.14.0 and later.

List the nodes to confirm your Kubernetes cluster version and make sure that it is 1.14.0 or later:

$ kubectl get nodes
 NAME STATUS ROLES AGE VERSION
 ip-172-20-112-25.ec2.internal Ready master 7h19m v1.15.0
 ip-172-20-126-108.ec2.internal Ready node 7h18m v1.15.0
 ip-172-20-51-209.ec2.internal Ready node 7h18m v1.15.0
 ip-172-20-92-89.ec2.internal Ready node 7h19m v1.15.0

In the preceding example, the version shows v1.15.0.