Hi Simone,
sorry for the late comment (I just found this thread while researching on nested oVirt-on-VMware issues).

It seems that the problem is generally known and has been solved upstream in kernel 4.16:

https://bugs.launchpad.net/qemu/+bug/1636217

Any ETA on backports in RHEL7? ;-)
(Note: should I open a Bugzilla on kernel package for this?)

Ciao Giuseppe,
Thanks for the accurate report.
Honestly I'm not aware of backport ETA but I'd suggest to file a bug on product: Red Hat Enterprise Linux 7, component kernel, subcomponent KVM pointing to the upstream patch.
Not sure if we are still on time for RHEL 7.6.

I seems that Hyper-V would experience the same troubles and I think that making nested-inside-Windows-host work should be deemed fairly important for demo/trial/lab uses... :-)

In the meanwhile, workarounds have been published for the new Ansible-based setup flow:

https://lists.ovirt.org/archives/list/users@ovirt.org/thread/UDVRS5I64WLFJJF7YXKXZNTQOZRJ6DOJ/?sort=date

on the other side, I can confirm that with the legacy setup flow (with option --noansible) adding the following to the answer file avoids the problem (did not test whether newer types like pc-i440fx-rhel7.2.0 solve it too):

OVEHOSTED_VM/emulatedMschine=str:rhel6.0.0

Many thanks.

Best regards,
Giuseppe

________________________________________
Da: Simone Tiraboschi <stirabos@redhat.com>
Inviato: lunedì 30 luglio 2018 09:20
A: bongsf@gmail.com
Cc: users
Oggetto: [ovirt-users] Re: Failed to deploy ovirt engine with "hosted-engine --deploy"



On Mon, Jul 30, 2018 at 6:04 AM Bong Shau Fui <bongsf@gmail.com<mailto:bongsf@gmail.com>&gt; wrote:
Hi Simone:
   Yes, it's in a nested environment.  L0 is vmware esxi 5.5.

I know for sue that a nested kvm env over vmware esxi is still problematic; kvm over kvm works fine instead.



regards,
Bong SF
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