So today I had a error on vSphere, specifically related to the HA agent:
On the cluster we had this error:
vCentre Server is unable to find a master vSphere HA agent in cluster
On the hosts we had this error:
vCentre Server is unavble to find the a master vSphere HA Agent is cluster.
Inscufficient resources to satisfy vSphere HA failover level o cluster.
And this is what it all looked like:
So the resolution:
Well what have I changed recently, updated vCentre and ESXi and I’ve also done some networking on the hosts (see my previous blogs).
But I’m not convinced thats what the issue is, so after some basic checks I found I couldnt ping the host names of the ESXi servers from the vCentre server.
After rebooting and clearing the DNS cache on my DC and finally rebooting the vCentre server pings were back, finially I Reconfigured the vSphere HA and bobs your uncle we’re back!!
If this doesnt work though, I suggest:
Check if you can navigate to the hosts via a web gui.
Restarting the management agents on the hosts:
Check the SSL certs on vSphere:
Remove the host from the cluster and re-add.