[kernel-xen] Issue Booting DomU's from certain hardware.

[Steven Haigh]

What comes to mind at the moment is that there is an issue with the 
Debian or Fedora kernel that stops them from loading. After Xen shows 
the pygrub menu, the next step is to launch the guest kernel. If this 
fails, then yes, the DomU will crash - which is what seems to be happening.

Can you post your DomU config file from /etc/xen?

What versions of various distros are you using? I'll try to replicate it 
here - but I admit I'm not a Fedora or Debian user...

-- 
Steven Haigh

Email: netwiz at crc.id.au
Web: http://www.crc.id.au
Phone: (03) 9001 6090 - 0412 935 897
Fax: (03) 8338 0299

On 29/09/2012 5:46 AM, Joe Fialkowski wrote:
> Steven,
>
> I loaded up the older version of Xen RPM's that I had a backup of. Seems
> its all OK with 4.1.3. 4.2 seems to have issues with Ubuntu and Fedora
> images using pygrub. Not sure why. But I hope this helps you narrow it
> down.
>
> --
> Joe Fialkowski
> ZoomCloud.net
>
> On Thursday, September 27, 2012 at 1:39 PM, Joe Fialkowski wrote:
>
>> Steven, here is what happens with the create. You will see it does not
>> get very far. Just to the grub menu and them crashes.
>>
>> [root at xm3 auto]# xm create -c /etc/xen/auto/vm1025.cfg
>> Using config file "/etc/xen/auto/vm1025.cfg".
>> Using <class 'grub.GrubConf.GrubConfigFile'> to parse /boot/grub/menu.lst
>>
>>
>> pyGRUB version 0.6
>> ┌─────────────────────────────────────────────────
>> ───────────────────────┐
>> │ vmlinuz-3.2.0-29-virtual │
>> │ │
>> │ │
>> │ │
>> │ │
>> │ │
>> │ │
>> │ │
>> └─────────────────────────────────────────────────
>> ───────────────────────┘
>> Use the ^ and v keys to select which entry is highlighted.
>> Press enter to boot the selected OS, 'e' to edit the
>> commands before booting, 'a' to modify the kernel arguments
>> before booting, or 'c' for a command line.
>>
>>
>>
>>
>> Will boot selected entry in 1 seconds
>>
>>
>> Started domain vm1025 (id=60)
>> [root at xm3 auto]#
>>
>> --
>> Joe Fialkowski
>> ZoomCloud.net <http://ZoomCloud.net>
>>
>> On Thursday, September 27, 2012 at 6:17 AM, Steven Haigh wrote:
>>
>>> Oh, further to this, have you tried using 'xm create <configfile>'?
>>>
>>> I have *never* used the 'xm start' command.
>>>
>>> --
>>> Steven Haigh
>>>
>>> Email: netwiz at crc.id.au <mailto:netwiz at crc.id.au>
>>> Web: http://www.crc.id.au
>>> Phone: (03) 9001 6090 - 0412 935 897
>>> Fax: (03) 8338 0299
>>>
>>> On 27/09/2012 7:48 PM, Steven Haigh wrote:
>>>> I've had a couple of reports of people with issues using Debian and
>>>> Fedora for DomU's having issues - however I haven't had any technical
>>>> details to try and track this down.
>>>>
>>>> I have pointed everyone who has contacted me to this list to see if we
>>>> can nut it out.
>>>>
>>>> On the Xen 4.2.0 machine, have a look at the logs in /var/log/xen and
>>>> see if you can parse anything out of that. It almost seems like an
>>>> incompatibility with the guest kernel to the new Xen hypervisor -
>>>> however this shouldn't be the case.
>>>>
>>>> In starting this, it may also be worthwhile to post your DomU config
>>>> file as well so I can even start to think about reproducing things. This
>>>> also goes for others who might have this same issue.
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>>
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