Upgrading 2012 to 2012R2 when there are a few guests VM running on the server

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lchiu7

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Uber Geek
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#159973 18-Dec-2014 21:19

I got asked the following question at work lately.

The team has a test server running 2012 on bare metal and a few Hyper-V guests. This would make an ideal test for DR to Azure but this requires the host be running 2012R2 (using Azure backup without SCVMM).

Can you upgrade the host without disturbing the guests or do you have to save the VHD's for each guest and after the host has been upgraded, create new VM's and re-attach the VHD's?

Thaks

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JWR

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#1200273 19-Dec-2014 00:50

Yes. You can upgrade from 2012 to 2012R2 without reinstalling all your VMs.

Obviously, back all your VMs up before the install. Also, shut them all down during the install.

You should upgrade Hyper-V Integration Services for each VM after the install.

/edit.. btw worked for me OK

toyonut

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#1200711 19-Dec-2014 17:48

I have done it in test and it worked fine, but never in prod. It does work though and I would consider it a viable upgrade to do especially if there are no other roles on the hyper-V host server.

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