Changing the MediaAgent Hostname on HyperScale 1.5 Reference Architecture

You can change the hostname of the node that contains the MediaAgent on HyperScale 1.5 Reference Architecture.

Procedure

1. Make a copy of the /var/lib/glusterd folder.

2. Execute the following command in the command line:

   umount /ws/glus
   

3. Stop the Commvault services.

4. Execute the command to stop the gluster volume name.

   gluster v stop gluster_volume_name

5. Stop the glusterd service.

6. Execute the command to change hostname on the node.

   hostnamectl set-hostname hostname

7. Update the /etc/host file on all the nodes or update the DNS records.

8. Edit the hostname in the peer files on all the nodes.

   cd /ws/ddb/glusterd/peers
   

   Example:

   [root@m4hcatest4new peers]# cat 0870d4e3-9cb1-48ee-8367-735a593fd0fd
   uuid=0870d4e3-9cb1-48ee-8367-735a593fd0fd
   state=3
   hostname1=m4hcatest5.commvault.com
   

9. Rename the files in the Vol folder on all the nodes.

   # cd /var/lib/glusterd/vols/ StoragePoolName

   Example:

   [root@m4hcatest4new DomainNameChange]# for f in `ls`; do matches=$(echo $f | grep DomainNameChange.m4hcatest5newsds.commvault.com.ws); if [ ! -z $matches ]; then name=$(echo $matches | cut -d "." -f 5); echo "$matches : $name"; mv $matches DomainNameChange.m4hcatest5newhostnamesds.commvault.com.$name.vol; fi; done 
   DomainNameChange.m4hcatest5newsds.commvault.com.ws-disk1-ws_brick.vol : ws-disk1-ws_brick
   DomainNameChange.m4hcatest5newsds.commvault.com.ws-disk2-ws_brick.vol : ws-disk2-ws_brick
   DomainNameChange.m4hcatest5newsds.commvault.com.ws-disk3-ws_brick.vol : ws-disk3-ws_brick
   DomainNameChange.m4hcatest5newsds.commvault.com.ws-disk4-ws_brick.vol : ws-disk4-ws_brick
   

10. Rename the files in the bricks folder on all the nodes. Copy the output of mvsyntax to rename the files.

    # cd /var/lib/glusterd/vols/ StoragePoolName/bricks/

    Example:

    [root@m4hcatest4new bricks]# for filename in m4hcatest4newsds.commvault.com*; do echo mv \"$filename\" \"${filename//m4hcatest4newsds.commvault.com/m4hcatest4newhostnamesds.commvault.com}\"; done
    mv "m4hcatest4newsds.commvault.com:-ws-disk1-ws_brick" "m4hcatest4newhostnamesds.commvault.com:-ws-disk1-ws_brick"
    mv "m4hcatest4newsds.commvault.com:-ws-disk2-ws_brick" "m4hcatest4newhostnamesds.commvault.com:-ws-disk2-ws_brick"
    mv "m4hcatest4newsds.commvault.com:-ws-disk3-ws_brick" "m4hcatest4newhostnamesds.commvault.com:-ws-disk3-ws_brick"
    mv "m4hcatest4newsds.commvault.com:-ws-disk4-ws_brick" "m4hcatest4newhostnamesds.commvault.com:-ws-disk4-ws_brick"
    

11. Edit the /etc/fstab entry with the new hostname.

    m4hcatest4newsds.commvault.com:/DomainNameChange      /ws/glus      glusterfs
    

12. Execute the following command in the command line:

    mount /ws/glus
    

13. Start the glusterd service.

14. Execute the command to start the gluster volume name.

    gluster v start gluster_volume_name

15. Start Commvault services.

16. Update the hostname of the MediaAgent in the CommServe. For more information, see Changing the Name and Host Name of a Client Computer.