This afternoon, we began the process of upgrading our main internal server running Windows Server 2008 R2 as a HyperV host to Windows Server 2012.
- Burn the ISO on to a DVD or Bootable USB.
- Make sure you have your Product Key for WS2012 handy. This edition of windows server does not allow you to continue without a valid product key.
- Make sure your backups are up to date.
- For HyperV servers, delete all snapshots.
- Shut down all running Virtual machines.
- Insert the media and run Setup.exe in the root of the installation media.
- Follow the prompts and select Upgrade existing Windows installation. The setup will check if your system is compatible and report on any issues if found.
(At this stage, I went off for a run to the supermarket and returned an hour later)
- Log in, start up all VMs and upgrade the HyperV Integration Services for each VM.
- Restart the VMs after the upgrade.
No errors were encountered and All systems were operational within 2 hours. The process could not have been more painless.
Watch this space for more details on Windows Server 2012! We will be working with a fantastic new feature called HyperV Replica, which will be an important milestone in setting up simple, low cost Disaster Recovery solutions for small businesses.