In-place Upgrading Windows Server 2012 Cluster Node to Windows Server 2012 R2

Last year, I wrote about upgrading a Windows Server 2012 Hyper-V server to Windows Server 2012 R2. That was an inplace upgrade and a direct shot.

After that, I was trying to see how this upgrade will happen if the Windows server 2012 is a member of a cluster.

Tried and here is the result.

Compatibility Report


Its something which is not possible. 😀

Though I shouldn’t be trying this keeping the thumb rule that cluster nodes must be unique. But this afternoon made me crazy thinking of different approach.

I wish if the systems are made in such a way that we can independently upgrade the cluster nodes one by one to the latest versions. May be – developers can think about having “Upgrade Mode” which will allow to have two versions of OS working together with limited functionality. so that we could quickly upgrade the nodes one by one and once finishing, switching back to the normal mode.