I have a SCVMM 2008 R2 (all updates) server running. I also have a new SCVMM 2012 SP1 server running.
I have moved individual hosts from 08 to 12 by removing them from 08 in the GUI and adding the in 12 in the GUI. That all went fine. I then moved a cluster (2008 R2 SP1, 3 hosts 95 VM's) from 08 to 12 using the same method. That was problematic. Some VM's went offline after the cluster was imported. Some said they were "incomplete" or "failed" etc. I had to refresh multiple times wait about 30min and all but 1 came back to life, some of which had to be restarted...and they acted like they crashed upon boot up "start windows normally". The 1 that is dead had a snapshot and the error when trying to start it referred to that. Also note I did verify that the old agent software was not installed on the 3 nodes before I imported the cluster.
Under the SCVMM 2008 R2 I have one remanning cluster, 8 nodes with 83 production server VM's running across them. I DONT want the same issues if I migrate this one. I am going through them to make sure there are no ISO files mounted from the old Library server and no snapshots exist.
Is there anything else I can do to ensure a smooth migration? Some thoughts
- Remove snapshots - will do
- Remove ISO's that are mounted - will do
- Update the 8 hosts in the cluster with the latest Microsoft updates??? (last done in late February 2013)
- Power off all the VM's??? (NOT a great choice at all)
- Leave the cluster there because its risky, and build a new 2012 cluster on new hardware and migrate the VM's then get rid of the old cluster???? (3 of the nodes are up for replacement in June and new hardware is ordered)
- Go back to VMware where doing this kind of operation was 1000x easier and always super stable. (done this kind of thing many times)
Any help would be great!
Thanks, -Lindy