Re: Distinguishing between host and guest initiated VM shutdown
Daniel P. Berrangé <berrange(a)redhat.com> writes:
On Thu, Aug 27, 2020 at 10:06:25AM +0200, Milan Zamazal wrote:
> "Daniel P. Berrange" <dan(a)berrange.com> writes:
>
> > On Wed, Aug 26, 2020 at 10:35:22PM +0200, Milan Zamazal wrote:
> >> Hi,
> >>
> >
> >> we have a problem in oVirt that highly available VMs don't restart
after
> >> host poweroff because Vdsm identifies the case as a user initiated
> >> shutdown (https://bugzilla.redhat.com/1800966).
> >>
> >> When poweroff is run on the host, libvirt-guests service takes an
> >> action.
> >
> > If oVirt is initiating a graceful host shutdown,
>
> I meant host shutdown not initiated by oVirt.
Well oVirt still knows at any point in time what VMs are currently
running on a host, so if it sees the host shutdown, it already
knows that needs restarting.
libvirt-guests ensures graceful shutdown of the VMs (which is a good
thing) so at the moment when the host gets down, there are no VMs
running there. We need that info at the moment when a VM is shut down
and I think we can get it by examining some systemd service (if ignoring
some not so important timing issues).
Regards,
Milan