Instructions for HA cluster

This topic describes the steps to manually move a NameNode when HDFS Transparency is in integrate state.

  1. From the dashboard, select Actions > Stop All1.

    1For FPO cluster, do not run STOP ALL from the Ambari GUI. Refer to the Limitations > General section on how to properly stop IBM Spectrum® Scale.

  2. On the Ambari server host, run the following command: 
    python /var/lib/ambari-server/resources/mpacks/SpectrumScaleExtension-MPack-
<version>/extensions/SpectrumScaleExtension/<version>/
services/GPFS/package/files/COMMON/MoveNameNodeTransparency.py

    Follow the command prompts and type the required input.

    $ python /var/lib/ambari-server/resources/mpacks/SpectrumScaleExtension-MPack-2.7.0.0/extensions/
SpectrumScaleExtension/2.7.0.0/services/GPFS/package/files/COMMON/MoveNameNodeTransparency.py
Enter the Ambari Server User:(Default User admin ):
Enter the Password for Ambari Server.
Password: 
Retype password: 
SSL Enabled (True/False) (Default False):
Enter the Ambari Server Port.(Default 8080)
Enter the Fully Qualified HostName of the Source NameNode which has to be Removed:- c902f09x02.gpfs.net
Enter the Fully Qualified HostName of the Destination NameNode has to be Added:  c902f09x03.gpfs.net
    Note:
    • SSL Enabled means Ambari HTTPS.
    • The source NameNode must be one of the NameNodes when HA is enabled, and the destination must be one of HDFS Transparency node.
  3. From the dashboard, select Actions > Start All.
  4. The process of moving the NameNode is now completed. Verify that the Active NameNode and the Standby NameNode are correct.