Windows Server 2008 R2 Thread, HA HyperV - Hosts need updated and restarted, how to manage the guests? in Technical; My HA hyperV cluster hosts need to have windows updates done on them and to be rebooted etc.
I have ...
28th June 2012, 09:44 AM #1
HA HyperV - Hosts need updated and restarted, how to manage the guests?
My HA hyperV cluster hosts need to have windows updates done on them and to be rebooted etc.
I have started to live migrate the guests from one to the others so i can then do the updates and restarts etc.
However rather than do this all manually is there an easier way to do it? If i just install the updates and then hit reboot will the guests automatically live migrate?
Or was my initial thought correct and I need to move them off first?
28th June 2012, 10:20 AM #2
Need to move them first otherwise they just shutdown and reopen on the other node.
Thanks to strawberry from:
RabbieBurns (28th June 2012)
28th June 2012, 02:17 PM #3
should use esx - up on entering maintenance mode on the host it will move all the guests to other hosts in the cluster automatically!
28th June 2012, 02:55 PM #4
System Centre Virtual Machine Manager can put a host into maintenance mode and live migrate to the best possible host.
Thanks to ascott2 from:
RabbieBurns (31st August 2012)
28th June 2012, 02:56 PM #5
If i put it into maintenance mode will it live migrate automatically?
30th June 2012, 02:28 PM #6
Yes they do
Originally Posted by RabbieBurns
I manually migrated them all first time round, and then after doing updates and restarts on host 1 i put host 2 into maintenance mode and they all migtrated automatically to host 1.
However Ive now done updates on host 2 and went to restart but it seems to have hung when restarting at "shutting down cluster service service"
Is it safe to cold reboot or should i leave it for a while longer?
30th June 2012, 02:58 PM #7
found this page and a fix which has saved a cold reboot
Hyper-V Cluster with 2 CSVs hangs on service shutdown of Cluster
Although Im not sure if a subsequent reboot will have the same problem.
I just had the same issue today.
All virtual machines were stopped before trying to reboot.
But instead of cutting the power I tried something a little less drastic.
I tried to kill tasks until the initiated shutdown process could continue.
This one worked since I still had ping responses from the server:
taskkill /S vhost2 /IM c* (but you could just try all letters in the alphabet until you get lucky)
SUCCESS: The process "cimlistener.exe" with PID 1592 has been terminated.
SUCCESS: The process "conhost.exe" with PID 1864 has been terminated.
SUCCESS: The process "clussvc.exe" with PID 2148 has been terminated.
And then the shutdown completed!
30th June 2012, 03:42 PM #8
Do you have any VMs which are configured to use dynamic memory?
Originally Posted by RabbieBurns
Hyper-V Host Freezes When Dynamic Memory VM’s Use All RAM
30th June 2012, 03:46 PM #9
all of them except the linux guests use dynamic ram.
The problem happened exactly as described in the scenario i posted tho rather than any sudden lockup. It was after a maintenance mode reboot after live migrating all the vms from one host to the other.
31st August 2012, 11:43 AM #10
this is still happening when I reboot, the cluster service service doesn't stop and i need to use the aforementioned fix to remotely kill the process and then it will shutdown / reboot successfully. Theres a load of posts on technet about this too but none seem to offer a solution...
Ive attached the output of cluster.log which is what a lot of the technet articles talk about but not sure if anyone can help...
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