I was upgrading vCenter from 4.0 U2 to 4.1 and installing it on a clean Windows 2008 64-bit server. The vCenter upgrade went OK, but the Update Manager install failed with “Error 25085. Setup failed to register VMware vCenter Update Manager extension to VMware vCenter Server.” I found VMware KB1024795 with a few fixes, but they did not resolve the issue.
I was trying to install Update Manager on the D: drive. I opened a ticket with VMware support and after some troubleshooting, their advice was to rebuild the 2008 server. Before starting over, I did a little more poking around. I discovered that somehow the local admins group had been removed from the D: drive permissions.
I was logged on to the domain with administrative permissions on the server and vCenter installed just fine. I’m not sure why Update Manager threw an error, but granting the local administrators group full control of D: resolved the problem.
VMware support confirms that there is a bug related to the vCenter 4.1 upgrade, it appears to be specifically related to Datastore alarms. The workaround was to go through and disable, then enable all datastore alarms. At least it was better than having to delete and recreate them.
We ran into an issue where our custom alarms in vCenter weren’t generating alerts after upgrade to vCenter 4.1. All of our existing alarms that were defined in vCenter 4.0 were still in place after the upgrade. However, alarming was inconsistent. We had one alarm defined on a single folder, some of the datastores that met the alert criteria were alarming, some of them weren’t.
I deleted the alarm definition and recreated it, all of the datastores that should have been alarming lit up… I have a ticket open with VMware support. At this point I’m not sure if I’m going to have to manually rebuild all of our alarms.