This is the documentation for Cloudera Manager 5.0.0.
Documentation for other versions is available at Cloudera Documentation.

Viewing and Regenerating Kerberos Principals

As soon as you enable Hadoop secure authentication for HDFS and MapReduce service instances, Cloudera Manager starts creating the Kerberos principals for each of the role instances. The amount of time this process will take depends on the number of hosts and HDFS and MapReduce role instances on your cluster. The process can take from a few seconds for a small cluster to several minutes for a larger cluster. After the process is completed, you can use the Cloudera Manager Admin Console to view the list of Kerberos principals that Cloudera Manager has created for the cluster. Make sure there are principals for each of the hosts and HDFS and MapReduce role instances on your cluster. If there are no principals after 10 minutes, then there is most likely a problem with the principal creation. See the Troubleshooting Security Issues section below for more information. If necessary, you can use Cloudera Manager to regenerate the principals.

If you make a global configuration change in your cluster, such as changing the encryption type, you must use the following instructions to regenerate the principals for your cluster.

To view and regenerate the Kerberos principals for your cluster:

  1. Select Administration > Kerberos.
  2. The currently configured Kerberos principals are displayed. If you are running HDFS, the hdfs/hostname and host/hostname principals are listed. If you are running MapReduce, the mapred/hostname and host/hostname principals are listed. The principals for other running services are also listed.
  3. Only if necessary, select the principals you want to regenerate.
  4. Click Regenerate.