Re: [Engine-devel] Watchdog support Feature
----- Original Message -----
From: "Laszlo Hornyak" <lhornyak(a)redhat.com>
To: "Doron Fediuck" <dfediuck(a)redhat.com>
Cc: "engine-devel" <engine-devel(a)ovirt.org>
Sent: Monday, February 11, 2013 9:56:42 AM
Subject: Re: [Engine-devel] Watchdog support Feature
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.
Thanks. Just note that poweroff requires guest co-operation
which we loose when kernel crashes. That's why it's not recommended.
----- Original Message -----
> From: "Doron Fediuck" <dfediuck(a)redhat.com>
> To: "Laszlo Hornyak" <lhornyak(a)redhat.com>
> Cc: "engine-devel" <engine-devel(a)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(a)redhat.com>
> > To: "engine-devel" <engine-devel(a)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(a)redhat.com>
> > > To: "engine-devel" <engine-devel(a)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
> > _______________________________________________
> > Engine-devel mailing list
> > Engine-devel(a)ovirt.org
> > http://lists.ovirt.org/mailman/listinfo/engine-devel
> >
>
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