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Forums › IT Pro and developers › Upgrading 2012 to 2012R2 when there are a few guests VM running on the server


5149 posts

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# 159973 18-Dec-2014 21:19
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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

779 posts

Ultimate Geek


  # 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

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  # 1200711 19-Dec-2014 17:48
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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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5149 posts

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  # 1200854 19-Dec-2014 21:57
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Thanks. I will tell the team to give it a shot. Maybe the safe approach is to backup all the VHD's first just in case!

This isn't a true production system - more like UAT so the impact of a failure is much less.




Staying in Wellington. Check out my AirBnB in the Wellington CBD.  https://www.airbnb.co.nz/rooms/32019730  Mention GZ to get a 10% discount

 

System One: Popcorn Hour A200,  PS3 SuperSlim, NPVR and Plex Server running on Gigabyte Brix (Windows 10 Pro), Sony BDP-S390 BD player, Pioneer AVR, Raspberry Pi running Kodi and Plex, Panasonic 60" 3D plasma, Google Chromecast

System Two: Popcorn Hour A200 ,  Oppo BDP-80 BluRay Player with hardware mode to be region free, Vivitek HD1080P 1080P DLP projector with 100" screen, Denon AVRS730H 7.2 Channel Dolby Atmos/DTS-X AV Receiver, Samsung 4K player, Google Chromecast, Odroid C2 running Kodi and Plex

 

 

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  # 1200933 20-Dec-2014 08:28
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As JWR said, I would definitely have a set of backups first. You can never have a truly risk free upgrade, but as far as upgrades go, this one seems pretty safe. 




Try Vultr using this link and get us both some credit:

 

http://www.vultr.com/?ref=7033587-3B

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