Hello,

I found some information about my lab in 2013.

I have verified I was using 5.1 so not exactly 5.5.

For that lab, where I ran Openstack Grizzly (and then IceHouse in a second step), I was able to use nested VMs inside the virtual Hypervisors (based on Qemu/KVM).

At that time I followed these two guides from virtuallyghetto for 5.0 and 5.1, that are still available.

It seems I didn't find a specific update for 5.5, so it could be that the guide for 5.1 is still ok for 5.5.

Can you verify if you followed the same steps in configuring vSphere?

Note that the guides are for nesting Hyper-V but I used the same guidelines to have a nested Qemu-KVM based hypervisor setup:

The guide for 5.0

http://www.virtuallyghetto.com/2011/07/how-to-enable-support-for-nested-64bit.html 

 

The guide for 5.1

One important new setup thing for the 5.1 version was the step 3) in section <Nesting "Other" Hypervisors>

Step 3 - You will need to add one additional .vmx parameter which tells the underlying guestOS (Hyper-V) that it is not running as a virtual guest which in fact it really is. The parameter is hypervisor.cpuid.v0 = FALSE

HIH,

Gianluca