Remediating clustered Hyper-V hosts using System Center 2012 Virtual Machine Manager SP1 Beta is pretty darn cool. I’m going to demonstrate how to start the process, discuss what is going on, and wrap it up with my thoughts. There really isn’t much to do assuming your cluster is setup properly and you have a function WSUS server that VMM is controlling.
In VMM I’m going to click on my Hyper-V cluster name and then remediate.
This screen shows I will be remediating both host1 and host2, restarts will be involved if necessary, and I want to live migrate the guest VMs so there isn’t any downtime. I could choose to save the state but that’s not as fun as live migrations!
Please excuse the “photo” but I wanted to show that host1 is rebooting during the process. Host2 didn’t reboot because I only installed one update on it and that update did not require a reboot. I’m installing two updates on host1 and one of those updates requires a reboot. VMM takes care of those reboots.
The one thing I wish would happen is all the guest VMs would go back to the hosts they were on before the remediation. I’m not using preferred owners so they will sit all on host2 unless I move DC01 back to host1
Overall remediating your Hyper-V hosts is pretty darn simple. You really don’t need to do too much. Hint-make sure you tell your boss installing updates on your Hyper-V hosts is time consuming so you can close the door and take a short nap while he/she thinks you’re working hard and need concentration!