Hello everyone,
I have a task on hand and even after searching the ‘net for quite some time, I have not come across a solution listed on one page. I hope this thread becomes a “Guide to migrating a Hyper-V 2012 cluster managed by VMM 2012 to Hyper-V 2012 R2 + VMM 2012 R2”.
My searches did find these useful threads but they do not have all the information I need:
So let me start by listing what I have right now:
- I have a 4 node cluster running Hyper-V 2012 SP1 (the free, core edition).
- It is currently being managed with SC VMM 2012 SP1.
- 99% of the VMs are running on CSVs cut off a Fiber Channel SAN. I have some VMs on local drives and they are not HA.
- Everything is in production. I have around 90 VMs total.
- I do have capacity to take up to two HV hosts out of the cluster and still survive just fine.
- I also have two other spare servers which have no OS on them.
What I don’t have:
- I do not have SCOM or DPM or any other SC component.
Well, I used to have SCOM 2012 but I uninstalled it and removed it. Long story, don’t ask! I do plan to install SCOM 2012 R2 at some point soon.
Here is what I want to do:
- Upgrade both the cluster and VMM to 2012 R2 version.
- This time, I want to use Server 2012 Datacenter edition (with GUI).
- I plan to join the spare servers to the 2012 R2 cluster.
Here is what I have learnt up until now (and correct me if I am wrong):
The steps I need to take to accomplish all this are:
- Upgrade VMM 2012 to VMM 2012 R2 version
- Eject at least one host from the cluster
- Install Server 2012 R2 on that server.
- Configure a one server (or more, if possible) cluster running 2012 R2
- Give that server the same old CSVs
- Use the “Copy cluster roles Wizard” to copy VMs from old cluster to new cluster. However this will incur downtime.
I have not started doing all this because I am not 100% sure on some things.
Here is the list of my questions:
1. About step #1: Upgrade VMM to VMM R2 version
Is there any reliable / official guide out there for this? I have seen these on the net:
http://technet.microsoft.com/en-us/library/dn469607.aspx
The problem I see is that none of them talk about upgrading a clustered scenario. Do I assume that the steps of upgrading VMM 2012 to 2012 R2 are the same with or without a cluster?
On the server I eject from the cluster, do I upgrade the OS or do a fresh install? I prefer doing a fresh install.
2. Is there a way of doing all this with no downtime?
I am worried about needing downtime for the last step “copy roles…”. I wish there was a way of migrating the roles (VMs) without any downtime.
3. Anything I need to worry about?
I wonder if I need to be careful about granting access to the CSVs to the new R2 Cluster. Will that cause any problem?
Any inputs on this topic are highly appreciated! I promise to update the first post so that it becomes a guide as I get corrections and inputs from everyone :-)
Thanks!
-Rajeev rajdude.com