[Engine-devel] Guest Reboot

[Doron Fediuck]

----- Original Message -----
> From: "Martin Betak" <mbetak at redhat.com>
> To: engine-devel at ovirt.org
> Sent: Friday, June 7, 2013 7:32:31 PM
> Subject: [Engine-devel] Guest Reboot
> 
> Hi, engine-devel
> 
> Customers request the ability to reboot a VM with a single click so I started
> designing the overall architecture and planing out the required changes to
> the respective components.
> You can find the wiki page for the initial draft at [1] and I would like to
> ask you for your input on my general design and potential issues that could
> arise in some corner cases.
> Please feel free to respond to this thread or add to the Issues section of
> [1].
> 
> Thanks in advance for your opinions :-)
> 
> Martin
> 
> [1] http://www.ovirt.org/Features/Guest_Reboot

Hi Martin,
Starting version 3.3 we'll enable a fully operational watchdog device.
This device is capable of auto-restarting a guest in case something
goes wrong in the guest (BSOD / kernel panic). This may handle some
of your use cases but not all of them.

My only request from you is to verify the reboot expected behavior
in VMs who are actively using a watchdog device set to restart the
guest. Otherwise users will see conflicts and/or double reboots.

The VM configuration may or may not include a guest agent and a
watchdog device. A watchdog device may reset (reboot) the guest,
but may also pause it for debugging purposes or simply do nothing.
So a table that lists VM configuration and expected behavior should
probably clarify everything and prevent implementation issues.

Doron