Got a 2008 R2 Hyper-V cluster with two hosts and an iSCSI SAN
I understand that you can't do an in-place upgrade of an existing 2008 R2 cluster. I've spoken to some of the Microsoft engineers at Tech-Ed a few years ago about how to turn my 2008 R2 cluster into a 2012 cluster and i get the high level steps below:
1
Move all VM's to single host
2
Evict empty host from cluster
3
Rebuild server as a 2012 machine, with Hyper-V
4
Export all VM's, save them on the SAN
5
Connect 2012 machine to SAN
6
Import VM's onto 2012 box
7
Rebuild the other server
8
Connect other server to SAN
9
Create the cluster, along with CSV's and all that
my question basically is about the subtle steps that go into some of those high level steps (i may have missed a step or two as well in there, or some could be in the wrong order)
Do I need to break the cluster shared volumes on the original cluster at all for the first rebuilt host to speak to the SAN?
Do I delete any old original VM files from the 2008 Hyper-V version due to the export/import process?
Are there any tricks in order to have the 2008 R2 and 2012 Hyper-V servers talk to the iSCSI SAN at the same time? (so that both see the files), or do i need to Export EVERYTHING, then break communication to the SAN from the 2008 box, before i can communicate with the SAN on the 2012 box?
Just trying to make sure i have the subtle detailed steps in mind before I go about trying to upgrade the cluster. It's possible i may buy a 3rd host during the upgrade process, so that i could create a hyper-v 2012 cluster before i wipe and rebuild the other server into 2012 and then add that machine to the cluster. i just don't want to lose the VM's.
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