[ INTERVIEW QUESTION ] vCenter 6.x in HA troubleshooting.

If they ask you... Have you installed vCenter 6.x in HA mode? How do you troubleshoot if there is any issue with vCenter availability? Impressive Answers! Yes! When vCenter HA is installed, a three-node vCenter Server cluster (Active, Passive, and Witness nodes) is deployed. If the Active node stops serving client requests.

Log in to Active node’s console directly.
1. Power off and delete the Passive node and the Witness node virtual machines.
2. Log in to the Active node by using SSH or through the Virtual Machine Console.
3. Run the following command to remove the vCenter HA configuration.
destroy-vcha -f
4. Reboot the Active node.
The Active node is now a standalone vCenter Server Appliance.
5. Perform vCenter HA cluster configuration again.

These steps helps you to bring your vCenter back online into the management network. When the vCenter server was not responding.