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Upgrade System and downgrade a license RRS feed

  • Question

  • Hey, everyone.

    I've got a tough job to do. In the company we have a cluster made up of two nodes - each on Windows 2012r2 Datacenter.
    After buying new licenses, a decision was made to change the system version to 2019 Standard.
    On the cluster there are of course production VM - which cannot be switched off.
    Do you have any tips how to do that? 
    Wednesday, October 21, 2020 5:12 AM

Answers

All replies

  • Hi,

    I am sure you guys know what you're doing licensing-wise.

    As to actually doing the upgrade, you couldn't upgrade to 2019 in a rolling fashion *anyway*, regardless of edition: https://docs.microsoft.com/en-us/windows-server/failover-clustering/cluster-operating-system-rolling-upgrade (OK, it used to clearly state that 2012R2 to 2019 is not possible, now I'm not finding this - but we're talking raising the cluster FL two steps which, I believe, is still not possible).

    So basically, what you do is move all VMs to one node, evict that node and reformat it. This is the point where you can change the edition from Datacenter to Standard. Then you add the newly installed node back into the cluster. If you have time, you can check if the 2012R2 cluster will accept a 2019 node or not. If it doesn't just install 2016. Move the VMs to the 2016 node and repeat with the remaining node.

    When both nodes are on 2016, raise the cluster FL to 2016 and repeat the procedure for 2016 -> 2019.


    Evgenij Smirnov

    http://evgenij.smirnov.de


    Wednesday, October 21, 2020 6:32 AM
  • Hello,

    Thank you very much for your answer. It will help me a lot in my work.
    It is a shame that I cannot make an upgrade to the standard license and need to format and install again.

    However, the ability to create a mixed cluster makes my work much easier anyway.
    Wednesday, October 21, 2020 9:00 AM
  • You can ask for more assistance in migrated forums here.

    https://docs.microsoft.com/en-us/answers/topics/windows-server-clustering.html

     

     



    Regards, Dave Patrick ....
    Microsoft Certified Professional
    Microsoft MVP [Windows Server] Datacenter Management

    Disclaimer: This posting is provided "AS IS" with no warranties or guarantees, and confers no rights.

    Wednesday, October 21, 2020 12:41 PM
    Moderator