As recommeneded by VMware upgraded vCenter to 6.5u3p (part of remidiation) towards recent vulnerbilities, i.e, https://www.vmware.com/security/advisories/VMSA-2021-0010.html.
vCenter previous Version : 14020092
There after we are expressing, error messages with "HA Agent" on the clusters, reconfigured the HA agent, issue not fixed.
([Event alarm expression: vCenter Server is unable to find a master vSphere HA agent; Status = Red] OR [Event alarm expression: vCenter Server connected to a vSphere HA master agent; Status = Green])
vCenter Server is unable to find a master vSphere HA agent in cluster CVW03 in EPCDC-AP
Did you attempt to disable the HA on the Cluster itself ?
If not , disable and then enable HA at the cluster level and then check the behavior.
If it does not work , then check the vpxa.log (On ESXI host) for any communication error between the vCenter and the ESXI.
PS: Mark kudos or correct answer as appropriate
Network issues will cause connectivity errors.
The Event "vCenter Server is unable to find a master vSphere HA agent; Status = Red", does notify connectivity issues in most cases. Check connectivity issues between the vCenter and ESXI host. (Check Ping , telnet and firewall)
However it may also relate to the fdm Agent (on ESXI Host) not working as expected.
Try the following steps :
1) Check the FDM status : /etc/init.d/vmware-fdm status ---------- It shld be running
2) Disconnect and re-connect the ESXI hosts.
3) Manually Uninstall and re-install the FDM vib on the ESXI host. Refer the following for more details :
Thanks for all your inputs AnK,
though we are using HPe BL's, here the issue with AMS (Agentless Management Service), /tmp folder is fully occupied with 100% to push the FDM agent update into the AMS folder.
HA could not be configured on most of the hosts.
*/tmp partition was at 100% on the hosts, where FDM agent was not pushed.
*ams-bbUsg.txt was filling up the space.
after removing the file, we got enough free space in the host partition.
*reconfigured HA at cluster level.
*HA configured successfully.