[Engine-devel] Watchdog support Feature

[Laszlo Hornyak]

----- Original Message -----
> From: "Dave Allan" <dallan at redhat.com>
> To: "Doron Fediuck" <dfediuck at redhat.com>
> Cc: "engine-devel" <engine-devel at ovirt.org>
> Sent: Tuesday, January 29, 2013 2:42:42 PM
> Subject: Re: [Engine-devel] Watchdog support Feature
> 
> On Tue, Jan 29, 2013 at 08:06:44AM -0500, Doron Fediuck wrote:
> > 
> > 
> > ----- Original Message -----
> > > From: "Dave Allan" <dallan at redhat.com>
> > > To: "Itamar Heim" <iheim at redhat.com>
> > > Cc: "engine-devel" <engine-devel at ovirt.org>
> > > Sent: Monday, January 28, 2013 7:23:25 PM
> > > Subject: Re: [Engine-devel] Watchdog support Feature
> > > 
> > > On Fri, Jan 25, 2013 at 08:34:27AM -0800, Itamar Heim wrote:
> > > > On 24/01/2013 06:19, Laszlo Hornyak wrote:
> > > > >Hi,
> > > > >
> > > > >Watchdog support in engine will add watchdog to the ovirt UI
> > > > >and
> > > > >REST API. Watchdog cards will be mainly used in HA vm's.
> > > > >
> > > > >http://www.ovirt.org/Features/Watchdog_engine_support
> > > > >
> > > > >Your feedback is welcome!
> > > > >
> > > > >Thank you,
> > > > >Laszlo
> > > > >_______________________________________________
> > > > >Engine-devel mailing list
> > > > >Engine-devel at ovirt.org
> > > > >http://lists.ovirt.org/mailman/listinfo/engine-devel
> > > > >
> > > > 
> > > > looks like a nice, simple, addition.
> > > > dave, anyone more intimate with the watchdog worth giving
> > > > another
> > > > look?
> > > 
> > > I had a look at the ovirt feature page and asked some libvirt
> > > folks
> > > as
> > > well, and it all looks good to me except that the libvirt
> > > documentation says that an event when watchdog fires will be
> > > added in
> > > the future.  That event has been added.  The watchdog should work
> > > pretty much identically to the physical world: configure the
> > > virtual
> > > watchdog card in the guest hardware description and install the
> > > watchdog daemon in the guest.
> > > 
> > > Dave
> > 
> > Thanks Dave.
> > Do you happen do know why the shutdown action is not recommended?
> 
> Yes--it requires guest cooperation which it's unlikely to get if the
> guest has gotten into a state where the watchdog fires.
> 
> Dave

Yep, the guest kernel should handle an ACPI signal. I don't know in what circumstances would that work, but vdsm does not support it either, so that decision is already made.

> _______________________________________________
> Engine-devel mailing list
> Engine-devel at ovirt.org
> http://lists.ovirt.org/mailman/listinfo/engine-devel
>