[ovirt-users] Nested KVM: what is the correct setup

[Gianluca Cecchi]

On Tue, May 30, 2017 at 3:42 PM, <ovirt at fateknollogee.com> wrote:

> Host: CentOS-7_v1611 (or Fedora 25 -my personal fav)
> VMs: oVirt nodes v4.1.2
>
> To setup nested KVM, I follow these instructions(https://pve.proxm
> ox.com/wiki/Nested_Virtualization)
>
> to check if is enabled do ("kvm_intel" for intel cpu, "kvm_amd" for AMD)
> -root at proxmox:~# cat /sys/module/kvm_intel/parameters/nested
> N
> (N means it's not, to enable ("kvm-intel" for intel, "kvm-amd" for AMD):)
>
> # echo "options kvm-intel nested=Y" > /etc/modprobe.d/kvm-intel.conf
> and reboot or reload the kernel modul
>
> modprobe -r kvm_intel
> modprobe kvm_intel
> check again
>
> -root at proxmox:~# cat /sys/module/kvm_intel/parameters/nested
> Y
>
> Question: what other settings need to be enabled in the guest vm?
> See "test nested virt" at https://fedoraproject.org/wiki
> /How_to_enable_nested_virtualization_in_KVM
> Do we need this setting in the vm?
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But one of the questions already asked to you also throughout the other
thread was:
what hypervisor are you using?
More precisely, as it is clear it is Qemu-KVM, what is the way you start
your VMs that are the candidates to become hypervisors in oVirt?
Is it with virt-manager, as described in one of the links you provided, or
direct virsh commands or what?
If you are using virt-manager, what did you specify in CPUs -->
Configuration --> Model ?
Did you choose the checkbox to "copy host cpu configuration"?

Gianluca
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