Checking updates of ESX 3.5 host through vCenter Update Manager 4.1 not possible
I got an issue with updating ESX 3.5 hosts - the problem is that vCenter Update Manager seems not to be able to check the ESX hosts for installed updates.
I'm using vCenter Server 4.1.0 (Build 258902, German-000) to manage two ESXi 4.1 and one ESX 3.5 cluster(s). The ESX 3.5 cluster includes 4 hosts with ESX 3.5.0 (Build 283373).
For deploying updates I'm using Update Manager 4.1 which works fine for my two ESXi 4.1 clusters.
It's not possible to update/check the hosts of the ESX 3.5 cluster. VMware Update Manager is configured to download patches for ESX 3.5 - the repository is configured and Update Manager also downloaded patches for ESX 3.5. If I try to validate the compliance of a single host (or the whole cluster) I'll get the following error message:
Patches for ESX have been downloaded correctly as I saw in the task list.
Pinging the vCenter was possible using the IP address, DNS wasn't working at that time due to search domain misconfiguration. I fixed that by entering the correct DNS search domain in the file /etc/resolv.conf