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

[ovirt at fateknollogee.com]

Yes, this is only for testing
I am using the oVirt nodes (engine + 3 hosts) all installed on a 
physical host (SuperMicro SYS-E200-8D)

On 2017-05-30 09:55, Nadav Goldin wrote:
> You need in the VMs to have the 'vmx' flag, if you are using libvirt
> you most likely should use 'host-passthrough' mode, otherwise nested
> virtualization might not work. Regardless of the emulated CPU type,
> you need to ensure 'vmx' flag is there, this can also be done
> explicitly in the libvirt XML.
> 
> If this is only for testing - I may suggest using oVirt system tests,
> which will do all these steps for you and setup a working oVirt
> environment(engine + 2 hosts). But, you will need to run it on a
> physical host.
> 
> 
> 
> 
> On Tue, May 30, 2017 at 4:42 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.proxmox.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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