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Re: [Xen-users] Newbie Xen + LVM issues for Debian DomU on Centos 5.2 Do

To: M C <m_c_001@xxxxxxxxxxx>
Subject: Re: [Xen-users] Newbie Xen + LVM issues for Debian DomU on Centos 5.2 DomO
From: Thomas Halinka <lists@xxxxxxxxx>
Date: Tue, 23 Dec 2008 12:20:57 +0100
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Am Dienstag, den 23.12.2008, 10:54 +0000 schrieb M C:
> Hi, 

Hi M C,

> 
> I'm trying to install a Debian 4.0 DomU on a Centos 5.2 DomO but I'm
> having problems. Using the Debian image from jailtime.org with the
> following config file:
> 
> kernel = "/boot/vmlinuz-2.6.18-92.1.22.el5xen"

initrd/ramdisk-line is missing here!


> memory = 1024
> name = "debian.4-0.64"
> vif = [ '' ]
> disk = ['file:/srv/xen/debian.4-0.64.img,sdb1,w',]
> vcpus=1
> on_reboot = 'destroy'
> on_crash = 'destroy'
> root = "/dev/sdb1 ro"
> 
> I end up with the following errors on trying to start up the image:
> 
> attempt to access beyond end of device
> ram0: rw=0, want=18446744056529682440, limit=32768
> isofs_fill_super: bread failed, dev=ram0, iso_blknum=17,
> block=-2147483648
> No filesystem could mount root, tried:  ext2 iso9660
> Kernel panic - not syncing: VFS: Unable to mount root fs on
> unknown-block(1,0)

i would guess that the needed modules are in initrd, which is not
defined above.

> 
> Here's what's set up on the host machine:
> 
> root% df -h
> Filesystem            Size  Used Avail Use% Mounted on
> /dev/mapper/VolGroup00-LogVol00
>                       143G   22G  114G  17% /
> /dev/sdb1              99M   36M   59M  38% /boot
> tmpfs                 1.2G     0  1.2G   0% /dev/shm
> 
> I should say that I have a guest Centos DomU running just fine on this
> DomO, but it's the Debian image that's giving me fun and games. This
> is the (autogenerated) config file that works for the Centos DomU:
> 
> name = "vmserver"
> memory = "1024"
> disk = [ 'tap:aio:/srv/xen/vmserver.img,xvda,w', ]
> vif = [ 'bridge=xenbr0', ]
> bootloader="/usr/bin/pygrub"
> vcpus=1
> on_reboot = 'restart'
> on_crash = 'restart'
> 
> Any clues on how I can get the Debian image to work would be much
> appreciated!

Wether say ramdisk= or use pygrub.

BTW: I am using xen-tools for setting up debian-based-guest-systems,
which runs very fine - also on centos5.

> 
> m
> 
hth,

Thomas


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