[Engine-devel] Watchdog support Feature

[Doron Fediuck]

----- Original Message -----
> From: "Laszlo Hornyak" <lhornyak at redhat.com>
> To: "Dave Allan" <dallan at redhat.com>, "Doron Fediuck" <dfediuck at redhat.com>
> Cc: "engine-devel" <engine-devel at ovirt.org>
> Sent: Tuesday, January 29, 2013 4:18:53 PM
> Subject: Re: [Engine-devel] Watchdog support Feature
> 
> 
> 
> ----- 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.
> 

Makes sense, thanks.