Hi.
I upgraded my hypervisors from ESXi 4.1 to ESXi 5 by update manager, AFTER I UPGRADE MY VCENTER.
Version list:
VCENTER: 5.0.0 455964
ESXi: 5.0.0 469512
I take a long time waiting before my computer which running vSphere Client, seeing the esxi upgrade task paused at 22%. Finally, I decide to go to the server room to check the servers. That's a funny textbox displayed: Upgrade complete. Press Enter to restart.... WTF
After a server restarting (funny, we need to press enter on the console of this server), there is a "configuration issues" box listed on the vSphere Client panel of each hypervisors:
vSphere HA agent for this host has an error: The vSphere HA agent is not reachable from vCenter Server.
There was an error unconfigurating the vSphere HA agent on this host. To solve this problem, connect the host to a vCenter Server of version 5.0 or later.
After I use "Reconfigure for vSphere HA", the text changed to:
vSphere HA agent for this host has an error: vSphere HA agent cannot be correctly installed or configured
In Events, I can see more logs:
Cannot login user @ 127.0.0.1: no permission
Cannot upgrade vCenter agent. Unknown installer error
Suddenly, I found the reason. Just disable "Lockdown Mode" in Security Profile of Configuration tab, re-run the "Reconfigure for vSphere HA", everything goes fine now.
That's my story.
