How to change a node hostname in Aria Operations

Products

• VCF Operations/Automation (formerly VMware Aria Suite)

Issue/Introduction

This article provides steps to change a node hostname in Aria Operations.

Environment

• VMware Aria Operations 8.x
• VCF Operations 9.x

Resolution

Note: Ensure a valid forward and reverse DNS entry are created on the DNS server by performing a nslookup on IP and FQDN.

To change analytics node (primary, replica, data) hostname in Aria Operations:

1. Log in to the Aria Operations admin UI
2. Take the cluster OFFLINE
3. Log in to the node as root
4. Update the hostname by running this command:
   
   $VMWARE_PYTHON_BIN /usr/lib/vmware-vcopssuite/utilities/bin/sethostname.py NewHostName
   
   Where NewHostName is the hostname you want to use
    
5. Restart the node from vCenter

Note: If the hostname fails to update after a restart, follow Restoring the vApp properties in VMware Aria Operations 8.12 and Below or Restoring vApp properties in VMware Aria Operations 8.14 and Later and try steps 3-5 again

6. Use the Aria Operations admin UI to bring the cluster ONLINE

 

To change the Cloud Proxy hostname in Aria Operations:

    1. SSH into the Cloud Proxy as root.

    2. Update the hostname by running this command:

        $VMWARE_PYTHON_BIN /usr/lib/vmware-vcopssuite/utilities/bin/sethostname.py NewHostName

        Where NewHostName is the hostname you want to use.

    3. Restart the node from vCenter.

        Note: If the hostname fails to update after a restart, follow Restoring the vApp properties in VMware Aria Operations 8.12 and Below or Restoring vApp properties in VMware Aria  Operations 8.14 and Later and try steps 1-3 again.

Additional Information:

If the hostname was used when adding a node to the cluster, the entry needs to be updated in the casa.db.script file:

1. Log in to VMware Aria Operations Master node as root through SSH or console.
2. Stop the casa service, by running this command:
   
   service vmware-casa stop
    
3. Back up the casa.db.script file, by running this command:
   
   cp /storage/db/casa/webapp/hsqldb/casa.db.script /tmp/casa.db.script.old
    
4. Open /storage/db/casa/webapp/hsqldb/casa.db.script file using a text editor.
5. Search for any instance of the old hostname in the ip_address field, and replace it with the new hostname.
6. Save and exit the file.
7. Start the casa service by running this command:
   
   service vmware-casa start
    
8. Repeat steps 1 to 7 on all analytic nodes (primary, replica, data) in the cluster.