title: How to get Kubernetes cluster zone names?
body: <p>I would like to know if there is any way to retrieve cluster zone names in Kubernetes API.
  I am using IBM dev cluster. As of now I got list of Nodes via k8s API using Go library and I can get zone information from node labels but this will be expensive way to get zone names. Would like to know if there is any other method which i can use to get zone names.</p>