[SOLVED] Nested Hyper V?

[killmasta93]

Hi, I was wondering if someone could lend me a hand. I know that having Hyper V within Proxmox is a bad idea but what happened is that I have a vhd need to convert it to proxmox but i forgot to add the reg file before migrating to proxmox. The thing is that i dont have Hyper V on physical machine. So this is what i got so far

   cat /sys/module/kvm_intel/parameters/nested
 Y

Then i ran though powershell to install Hyper V
on the hardware configuration i put the CPU to Host
The issue is that when i turn on the virtual machine im getting this error

 failed to start the virtual machine because one of the hyper v components is not running

any ideas?


Thank you

 

[LnxBil]

AFAIK, Hyper-v detects a virtualisation and does not start. Years ago, I tried and failed, too.
This was discussed before, yet QEMU recently included some new flags that may get it to work. I haven't tried this yet, but it looks promising:

https://ladipro.wordpress.com/2017/02/24/running-hyperv-in-kvm-guest/

 

[janssensm]

If you really need to add that registry before migrating to proxmox you could perhaps use Virtualbox as the step in between.
Virtualbox supports vhd files for quite some time:
https://ollysense.blogspot.nl/2010/05/virtualbox-using-hyper-v-vhd-image.html

So then you wouldn't need a nested install just a host with Virtualbox.

 

[killmasta93]

Thanks for the reply, did not know thank you again that might help me alot, but would this also apply for vhdx?

 

[janssensm]

As the following post suggests, Virtualbox does vhdx only in readonly mode.
https://forums.virtualbox.org/viewtopic.php?f=9&t=83990

So its only useful for cloning/converting.
Maybe its best to convert to native Virtualbox format (VDI), boot up your VM, do your thing with registry, convert/import in Proxmox.

But then again, with Virtualbox you can run into the same boot issues as with KVM/Proxmox, (INACCESSIBLE_BOOT_DEVICE),
its worth a try. Windows is not very flexible compared to linux distros concerning boot process.