CentOS virt - Jan 2009 - Ubuntu 8.04 DomU image from jailtime.org on CentOS 5.2 Dom0

Hello all,

I am trying to get an Ubuntu 8.04 image running on my CentOS 5.2 Dom0
which so far has only been running CentOS 5.2 DomUs.

The image I am trying to run was fetched from jailtime.org (just so I
didn't have to go through building an image for myself).

The configuration of the DomU is based on what the guys at
jailtime.org provided and its as follows

name = "redgum"
kernel = "/boot/vmlinuz-2.6.18-92.1.22.el5xen"
memory = "1024"
disk = ['file:/srv/xen/redgum.img,sda1,w']
root = "/dev/sda1 ro"
vif = [ 'bridge=xenbr0', ]
vcpus=4
on_reboot = 'restart'
on_crash = 'restart'

When I start the VM I get the following message

VFS: Cannot open root device "sda1" or unknown-block(0,0)
Please append a correct "root=" boot option
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)

As per my configuration I have mounted the image to sda1 and the root
is specified for the Kernel. Any one with similar experiences or could
point me to the right direction?

Thanks.


-- 
"I never look back darling, it distracts from the now", Edna Mode (The
Incredibles)

On Tue, Jan 6, 2009 at 9:21 PM, Devraj Mukherjee <devraj at gmail.com>
wrote:
> Hello all,
>
> I am trying to get an Ubuntu 8.04 image running on my CentOS 5.2 Dom0
> which so far has only been running CentOS 5.2 DomUs.
>
> The image I am trying to run was fetched from jailtime.org (just so I
> didn't have to go through building an image for myself).
>
> The configuration of the DomU is based on what the guys at
> jailtime.org provided and its as follows
>
> name = "redgum"
> kernel = "/boot/vmlinuz-2.6.18-92.1.22.el5xen"
> memory = "1024"
> disk = ['file:/srv/xen/redgum.img,sda1,w']
> root = "/dev/sda1 ro"
> vif = [ 'bridge=xenbr0', ]
> vcpus=4
> on_reboot = 'restart'
> on_crash = 'restart'
>
> When I start the VM I get the following message
>
> VFS: Cannot open root device "sda1" or unknown-block(0,0)
> Please append a correct "root=" boot option
> Kernel panic - not syncing: VFS: Unable to mount root fs on
unknown-block(0,0)
>
> As per my configuration I have mounted the image to sda1 and the root
> is specified for the Kernel. Any one with similar experiences or could
> point me to the right direction?
>
adding a ramdisk= line to your domU config should help.

Also it is a good idea to also copy /lib/modules/<xen kernel> to the
guest's /lib/modules.

Cheers,
Todd

-- 
Todd Deshane
http://todddeshane.net
http://runningxen.com