We have a 4-host vSphere cluster. (ESXi at 6.0. vCenter at 6.5.)
To expand vSAN, we had to reboot all hosts. Now HA is failing on 2 of them. (vSAN is healthy after initial congestion.)
- Have tried "Reconfigure for vSphere HA" many times.
- After putting in Maintenance mode, removed a problem host from inventory. Later added back to the cluster. Made no difference.
- Rebooting has not helped.
Message: 'Cannot complete the operation due to an incorrect request to the server'
Event log says: 'vSphere HA agent for this host has an error: vSphere HA agent cannot be installed or configured.'
Have looked at many KB articles including #2056299. It talks about checking fdm-installer.log file but no such file exists on any of the host, HA working or not. Have not changed configuration of the hosts in at least 6 months, other than expanding vSAN.
Please advise. Thanks.