Rename a Cluster
After you create a cluster, you can rename it by using the Rename Cluster feature:
Steps
In Clusters, click the Rename Cluster icon, next to the cluster name that you want to change:
Enter alphanumeric characters to rename your cluster.
Click the check mark.
Confirm.
Restart Ambari server and the Ambari agents.
After renaming the cluster, alert checks must be re-queued on the agents. Therefore, you must restart Ambari Server and the Ambari Agents for the change to take effect.
Adjust any API calls you make to use the new name.
Changing the name of the cluster changes the name of the Ambari REST API resource for the cluster