Xen users - Dec 2008 - xen,debian lenny and hvm(winxp)

Hi,
i want to install a WinXP as vm, but it won''t work. "xm list"
tells me
that the winxp-vm is running, but I am not able to connect via vnc. nmap
tells me that there is no vnc-port listening and ps -A tells me that
qemu-dm does not work. Maybe someone could help me because i have no
idea what''s wrong..

System: Debian Lenny
XEN: from lenny-repository

ps -A says: qemu-dm <defunct>

xen:/domains/xp# xm dmesg | grep HVM
(XEN) HVM: VMX enabled


cat /etc/xen/xp.cfg

kernel      = ''/usr/lib/xen-default/boot/hvmloader''
builder     = ''hvm''
memory      = ''512''

#
#  Disk device(s).
#
disk        = [
                  ''file:/domains/xp/xp.img,ioemu:hdc,w'',
                 
''file:/var/daten/winxp.iso,ioemu:hda:cdrom,r'',
              ]

device_model = ''/usr/lib/xen-default/bin/qemu-dm''
ne2000=0


#
#  Hostname
#
name        = ''xp''

#
#  Networking
#
#dhcp        = ''dhcp''
vif         = [ ''type=ioemu, bridge=xenbr0'']

#
#  Behaviour
#
on_poweroff = ''destroy''
on_reboot   = ''restart''
on_crash    = ''restart''

#vfb = [ ''type=vnc'' ]
boot=''d''
vnc=1
vncviewer=1
sdl=0



Greets
Wolfgang

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Ken Cobler schrieb:
>>  
> You copied the Windows XP disc on to your computer?  It might not have
> copied the boot sectors.
>
> I used the actual cdrom device to boot from when I was loading Windows
> XP (and Windows 2003).  I choose to use a raw partition for the data. 
> I could have used a file under as Linux, like you listed.
>
> Here is my disk entry:
>
> disk=[ ''phy:/dev/cciss/c0d0p3,hda,w'',
''phy:/dev/cdrom,hdc:cdrom,r'', ]
>
> Ken Cobler
Now i have this configuration for my disks:
disk        = [ ''file:/domains/xp/xp.img,hda,w'',
''phy:/dev/cdrom,hdc:cdrom,r'', ]

But it still does not work. Are there any tools for debugging? The
logfiles don''t help me much.

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Ken Cobler schrieb:
> Have you checked in /var/log/xen for the qemu logfile ?  It will give
> more details about what it is trying to do.  If you can send, that
> might help me see what is going on.
>
> Ken
Now it works. The bridge xenbr0 does not exist. I changed this and now
it works.

Thank you very much!

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listener wrote:
> Now i have this configuration for my disks:
> disk        = [ ''file:/domains/xp/xp.img,hda,w'',
> ''phy:/dev/cdrom,hdc:cdrom,r'', ]
> 
> But it still does not work. Are there any tools for debugging? The
> logfiles don''t help me much.
I thought this was important to be said in order to not loose time if
you are comming from another distro that Debian.

If you are using Lenny, then you should do:

cd /usr/lib
ln -s /etc/alternatives/xen-default xen

otherwise hvm VMs wont work. I have submit a bug report in the debian
BTS about it, it set to RC (release critical, just to make sure that
this is fixed for Lenny), but the maintainer said it was not so critical
and have set the bug as only "important"...

Some other same abnormalities in Debian: the python files in
/usr/lib/python/xen are NOT accessible in the python path unless you do:

cd /usr/lib/python-support
ln -s /usr/lib/xen/lib/python xen

otherwise, any import of the xen python lib will work in python. Now,
the maintainer replied to my bug report that I was being stupid to
consider importing anything, and the bug has been set to "wont fix"...

I will still try to build a patch for the debian packages and push for
their inclusion (as well as adding a /etc/xen/auto folder that is not
created by default in Debian).

Another particularity: the xen bridge used is named eth0. I don''t
understand this choice as using a xenbrX seems to be quite a reasonable
"standard" in Xen. Making it with a different name means that any
userland script for the general audience of Xen users concerning the Xen
bridge will need adaptation...

Thomas

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Thomas Goirand schrieb:
> I thought this was important to be said in order to not loose time if
> you are comming from another distro that Debian.
>
> If you are using Lenny, then you should do:
>
> cd /usr/lib
> ln -s /etc/alternatives/xen-default xen
>   
done ;)
>
> Some other same abnormalities in Debian: the python files in
> /usr/lib/python/xen are NOT accessible in the python path unless you do:
>
> cd /usr/lib/python-support
> ln -s /usr/lib/xen/lib/python xen
>   
there is no /usr/lib/xen/lib/python!


thank you thomas for your very helpful hints!

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Thomas Goirand wrote:
>Another particularity: the xen bridge used is named eth0. I don''t
>understand this choice as using a xenbrX seems to be quite a reasonable
>"standard" in Xen. Making it with a different name means that any
>userland script for the general audience of Xen users concerning the Xen
>bridge will need adaptation...
That threw me somewhat when I built a server with Lenny, having 
previously used Etch. Took me ages to get the networking working :-(

-- 
Simon Hobson

Visit http://www.magpiesnestpublishing.co.uk/ for books by acclaimed
author Gladys Hobson. Novels - poetry - short stories - ideal as
Christmas stocking fillers. Some available as e-books.

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On Tue, Dec 16, 2008 at 10:46 AM, Simon Hobson
<linux@thehobsons.co.uk>wrote:
> Thomas Goirand wrote:
>
>  Another particularity: the xen bridge used is named eth0. I don''t
>> understand this choice as using a xenbrX seems to be quite a reasonable
>> "standard" in Xen. Making it with a different name means that
any
>> userland script for the general audience of Xen users concerning the
Xen
>> bridge will need adaptation...
>>
>
> That threw me somewhat when I built a server with Lenny, having previously
> used Etch. Took me ages to get the networking working :-(
>
> --
> Simon Hobson
>
Didn''t this come in with newer versions of Xen though? CentOS does the
same.
I''ve found poorly written applications that work better with the bridge
being called eth0 though. I''ve had to change VirtualBox to mimic Xens
strategy for that reason.


Grant McWilliams

Some people, when confronted with a problem, think "I know, I''ll
use
Windows."
Now they have two problems.


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listener wrote:
> Thomas Goirand schrieb:
>> I thought this was important to be said in order to not loose time if
>> you are comming from another distro that Debian.
>>
>> If you are using Lenny, then you should do:
>>
>> cd /usr/lib
>> ln -s /etc/alternatives/xen-default xen
>>   
> done ;)
>> Some other same abnormalities in Debian: the python files in
>> /usr/lib/python/xen are NOT accessible in the python path unless you
do:
>>
>> cd /usr/lib/python-support
>> ln -s /usr/lib/xen/lib/python xen
>>   
> there is no /usr/lib/xen/lib/python!
Of course there is, otherwise the "xm" tools wouldn''t be
working. It''s
just that you don''t have a /usr/lib/xen as it should (as I said, you
should create one linking to /etc/alternatives/xen-default that will
itself link to /usr/lib/xen-3.2.1). By the way, I should have write:

cd /usr/lib/python-support
ln -s /usr/lib/xen/lib/python/xen xen

Thomas


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