How to change the ips in cloudera manager
1) stop all the cloudera manager agents in all the clusters
2) stop the cloudera manager server and server db service in the scm server (namenode server)
3) Modify /etc/cloudera-scm-agent/config.ini to point to the new scm server ip (namenode server ip)
4) In /etc/hosts file add your new ip address and hostnames
5) Start all the services 1 by 1 from server-db, server, agent and you can see the ips got changed in the Host on cloudera
Adding a new role instances to your cloudera manager or adding a new host into your existing cluster.
https://ccp.cloudera.com/display/ENT/Adding+Role+Instances
