Recently I was setting up an environment of two Hyper-V 2012 R2 servers, my plan was to manage these instances of core Hyper-V from a full Windows Server running 2012 R2 to benefit from the GUI Hyper-V Manager. I decided to use my Domain Controller so the first step was to install the Hyper-V server role, when I did this I received the following error "Hyper-V cannot be installed: A hypervisor is already running." this was of course because my Domain Controller is actually a Virtual Machine.
The work around for me in this case was to use
PowerShell to install only the Hyper-V Management Tools to allow for remote
management. I used the following PowerShell command to find the exact name of
the feature I had to install;
|
Get-WindowsFeature *rsat*
|
To install the management tools use the following
command;
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Install-WindowsFeature RSAT-Hyper-V-Tools
|
After a reboot you should be able to launch the
Hyper-V Manager, you can then use the Connect to Server.... button to
establish connections to the Hyper-V servers.
If you actually want to run Hyper-V 2012 R2 as a
nested hypervisor capable of running nested Virtual Machines, please consult
the following blog post http://blog.ryanbetts.co.uk/2014/06/using-vmware-workstation-10-to-run.html
you basically have to add hypervisor.cpuid.v0 = "FALSE" and mce.enable
= "True" to the Hyper-V VM's VMX file (if you are using VMware
Workstation).
