[Engine-devel] Watchdog support Feature

[Laszlo Hornyak]

Hi Doron,

If the watchdog is set to action="reset" and you break the kernel, the VM will stay in UP state while waiting for the watchdog to reset the VM, and will still be in UP state while rebooting. So in theory engine will not be notified about a crash.
This behavior is different when the action="poweroff" because the watchdog will really put the VM in a Down state and it is engine's job to restart it if HA as soon as it receives the notification from VDSM.


----- Original Message -----
> From: "Doron Fediuck" <dfediuck at redhat.com>
> To: "Laszlo Hornyak" <lhornyak at redhat.com>
> Cc: "engine-devel" <engine-devel at ovirt.org>
> Sent: Sunday, February 10, 2013 4:40:29 PM
> Subject: Re: [Engine-devel] Watchdog support Feature
> 
> Hi Laszlo,
> Looks very useful. Any thoughts on what engine will do while
> if the VM is defined as HA while the watchdog is resetting it?
> 
> 
> ----- Original Message -----
> > From: "Laszlo Hornyak" <lhornyak at redhat.com>
> > To: "engine-devel" <engine-devel at ovirt.org>
> > Sent: Wednesday, February 6, 2013 11:25:03 AM
> > Subject: Re: [Engine-devel] Watchdog support Feature
> > 
> > Hi everyone,
> > 
> > I hope everyone is satisfied with the spec, please read it through
> > for the last time and I will move it to implementation phase soon.
> > 
> > Thx,
> > Laszlo
> > 
> > ----- Original Message -----
> > > From: "Laszlo Hornyak" <lhornyak at redhat.com>
> > > To: "engine-devel" <engine-devel at ovirt.org>
> > > Sent: Thursday, January 24, 2013 3:19:57 PM
> > > Subject: Watchdog support Feature
> > > 
> > > 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
> > _______________________________________________
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> > Engine-devel at ovirt.org
> > http://lists.ovirt.org/mailman/listinfo/engine-devel
> > 
>