Upgrading Windows Server 2008 R2 File Cluster to 2012 R2

Hi,

I am running a Windows Server 2008 R2 file cluster of 2 nodes. Both nodes are physical and I want to convert them in to virtual. Well, not literary convert.

So, while making those node virtual, I will install Windows Server 2012 R2 and I also know that we can't just upgrade the Windows Server 2008 R2 file cluster to 2012 R2.

I am also mapping 10 NetApp SAN LUNS to existing file cluster.

Now, how can I actually migrate the existing file cluster to new cluster that will be based on virtual servers? Remember, I can't present LUNS to two cluster at a time, I will have to do it to one cluster only at a time. Can anyone please guide me in this regard?

Our virtual infrastructure is VMWare 6.0
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A1opusAsked:
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Dan McFaddenSystems EngineerCommented:
The questions has been asked on EE before.  Below is a link to the solved question.

link:  http://www.experts-exchange.com/questions/28701134/How-to-migrate-Windows-Server-2008-R2-file-server-cluster-to-Windows-Server-2012-R2.html

Dan
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
If you have RDMs in place, on your NetApp, why not just install new virtual servers on ESXi 6.0 ?
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A1opusAuthor Commented:
@Dan,

Yes, you are right. I thought, I should ask again more specifically if there is anything missing.

@Andrew:

Well, we will install virtual servers but I am talking about the cluster migration along with RDMs.
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Dan McFaddenSystems EngineerCommented:
Not that I can think of.

Dan
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
How are you migrating ?
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A1opusAuthor Commented:
Hey Dan,

Quick question, in regards to guide you have mentioned (http://alexappleton.net/post/92084405009/step-by-step-hyper-v-failover-cluster-migration-to), is it necessary to evict one of the nodes?
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Dan McFaddenSystems EngineerCommented:
No, that step is for when you wanted to rebuild the existing cluster but use the current hardware.

If you have new hardware (or new virtual servers) there is no need to evict.  Though I would recommend moving all clustered resources to a single server and then pausing the passive node to ensure that nothing could accidentally migrate automatically.

Dan
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A1opusAuthor Commented:
Dan,

Thanks a lot for clarification.

So, if I use Copy Cluster Roles, it will not break anything in production, right? I want to do it step by step.
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Dan McFaddenSystems EngineerCommented:
What is needed is after the copy cluster role process finishes, a short outage to shutdown the roles on the old cluster, move the LUNs to the new cluster and then bring the cluster resources online on the new cluster.

So break, shouldn't... cause an outage, inevitable.

The length of the outage is dependent upon how fast the LUNs can be moved, the volumes can be verified and the roles (and dependent resources) can be brought up.  Its longer than failing over the roles & resources to another node in the same cluster.

Dan
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