Xen users - Jan 2013 - Xen Domains disappear after reboot, destroy, shutdown, etc

Greetings

I''m really new with Xen, I have installed xen-4.1 on a computer running
Ubuntu 12.04.1LTS, I''ve setup my Dom0 but when I reboot (shutdownm
destroy)
a DomU this dissapear from the list, my toolstack is XL. I know if I put my
.cfg files inside /etc/xen dir the machines are avalaible when  boot my
host but when shutdown they dissapears

-- 
<http://stackoverflow.com/users/flair/816721.png>
http://stackoverflow.com/users/816721/rkmax


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On Thu, 2013-01-10 at 17:18 +0000, Julian wrote:
> I''m really new with Xen, I have installed xen-4.1 on a computer
> running Ubuntu 12.04.1LTS, I''ve setup my Dom0 but when I reboot
> (shutdownm destroy) a DomU this dissapear from the list, my toolstack
> is XL. I know if I put my .cfg files inside /etc/xen dir the machines
> are avalaible when  boot my host but when shutdown they dissapears
This is normal behaviour with xl, domains do not persist when they are
not running. The disk state etc will (unless you delete it or something)
You can restart them by simply using xl create on the same config file
again.

If you want domains to persist while they are not running then you need
to use a toolstack which supports "managed domains". The two main
choices there are the xapi toolstack (part of XCP, also available in
Debian & Ubuntu) or libvirt. (The old xend toolstack also supports this
mode, but is deprecated so I wouldn''t recommend using it for new
deployments).

Ian.

>
>I''m really new with Xen, I have installed xen-4.1 on a computer
running Ubuntu 12.04.1LTS, I''ve setup my Dom0 but when I reboot
(shutdownm destroy) a DomU this dissapear from the list, my toolstack is XL. I
know if I put my .cfg files inside /etc/xen dir the machines are avalaible when
 boot my host but when shutdown they dissapears
>

In fact, what behaviour are you expecting/desiring?

On 01/11/2013 11:59 AM, Ian Murray wrote:
> 
> 
>>
>> I''m really new with Xen, I have installed xen-4.1 on a
computer running Ubuntu 12.04.1LTS, I''ve setup my Dom0 but when I
reboot (shutdownm destroy) a DomU this dissapear from the list, my toolstack is
XL. I know if I put my .cfg files inside /etc/xen dir the machines are avalaible
when  boot my host but when shutdown they dissapears
>>
> 
> 
> In fact, what behaviour are you expecting/desiring?
> 
I have the same problem, that (PV) domains don''t reboot. As a
workaround
I do an xl create after a shutdown.
What I *don''t* expect is this in the log:

root@xen03:/var/log/xen# cat xl-drupal.log
Waiting for domain drupal (domid 6) to die [pid 8112]
Domain 6 is dead
Action for shutdown reason code 1 is restart
Domain 6 needs to be cleaned up: destroying the domain
Done. Rebooting now
failed to run bootloader: -3

In xend.log I get:
[2013-01-14 12:44:02 1746] ERROR (XendDomainInfo:2195) VM drupal
restarting too fast (Elapsed time: 22.113466 seconds). Refusing to
restart to avoid loops.

So there seems to be a problem with pygrub (which I''m using for pv
domains). It works fine with xl create, but not with xl restart (or
rebooting from within the vm).

Btw, this is Ubuntu 12.04 LTS on the dom0 and pv domain using the xl
toolstack (obviously).

kind regards, Mark

On Mon, 2013-01-14 at 11:50 +0000, Mark Dokter wrote:
> 
> So there seems to be a problem with pygrub (which I''m using for pv
> domains). It works fine with xl create, but not with xl restart (or
> rebooting from within the vm).
This was fixed in 4.2.

There are some known issues with xl in 4.1. If you are hitting them then
I would recommend either sticking with xend on 4.1 or upgrading to 4.2.

Ian.