I need suggestion to replace a namenode host in HA. The machine has hardware problem. I have to replace it. We have namenode HA and Kerberos.
Thanks a lot
You can use Ambari to move a Namenode to another host if I recall correctly. First, select the HDFS service from the left-hand view. Then go to the Service Actions on the upper right and use the pulldown to select the action to move the Namenode.
If you need to add another host to the cluster first, you can use Ambari to add the host (Hosts --> Actions --> Add New Host) prior to moving the Namenode.