Xen users - Feb 2006 - Xen and OpenSSI

Hi All,

I''m trying to get OpenSSI working on Xen and have hit a problem.

I''m following the instructions at
http://openssi.org/cgi-bin/view?page=docs2/1.9/debian/xen-howto.txt and
also the document at http://www.option-c.com/xwiki/OpenSSI 

I''ve got as far as booting the domU with the OpenSSI kernel and I get
"Kernel panic - not syncing: VFS: Unable to mount root fs on
unknown-block(1,0)"
My base Xen installation is 2.07 on Debian Sarge using the packages from
option-c and I used the pre-built OpenSSI kernel.

My config file for the domU is:

#kernel = "/boot/xen-linux-2.6.11-ocxenu"
kernel = "......./xenU-vmlinuz"
ramdisk = "........./initrd"
memory = 64
name = "<hostname>"
disk =
[''file........img,hda1,w'',''file.........img,hda2,w'']
root = "/dev/hda1 ro"
#
vif = [''mac=AA:00:00:18:94:FB'']

and /etc/fstab on the domU is

# Begin /etc/fstab
# <file system> <mount point>   <type>  <options>

/dev/hda1       /       ext3    defaults,errors=remount-ro,node=1
0
/dev/hda2       swap    swap    sw,node=1       0       0
proc    /proc   proc    defaults,node=* 0       0
# End /etc/fstab

Does anyone have any ideas as to where I''ve gone wrong?





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Just so you know it works, it does :) as I was able to get OpenSSI running
under XEN 2.0.7. I know I had the same issue as you are seeing and I''m
trying to remember what I did.

I think it has to do with the initrd not being created correctly. My
OpenSSI/Xen config looks like:

name="openssi1"
memory=128
kernel="/boot/vmlinuz-2.6.10-xenU-openssi"
ramdisk="/boot/initrd-deb-xen-openssi2"
nics=1
vif = [''mac=AA:00:00:18:98:FB'']
disk=[''file:/opt/xen-images/deb_openssi2,sda1,w'',''file:/opt/xen-images/deb_openssi1_swap,sda2,w'']
root="/dev/sda1 ro"







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On 2/14/06, Owen Campbell <owen@empiria.co.uk>
wrote:
>
>
> Hi All,
>
> I'm trying to get OpenSSI working on Xen and have hit a problem.
>
> I'm following the instructions at
> http://openssi.org/cgi-bin/view?page=docs2/1.9/debian/xen-howto.txt
> and also the document at
> http://www.option-c.com/xwiki/OpenSSI
>
> I've got as far as booting the domU with the OpenSSI kernel and I get
> "Kernel panic - not syncing: VFS: Unable to mount root fs on
> unknown-block(1,0)"
I remember seeing that problem when originally writing the wiki page
at Option-C. If I remember, it occurred because the initrd image
hadn't been created correctly. One of the problems I had was that the
image wasn't being compressed -- the domU didn't have enough memory.
Another was that the root device was different inside the domU versus
outside (/dev/sda1 vs. /dev/hda1). It doesn't look as if that's your
problem.

> My base Xen installation is 2.07 on Debian Sarge using the packages from
> option-c and I used the pre-built OpenSSI kernel.
>
> My config file for the domU is:
>
> #kernel = "/boot/xen-linux-2.6.11-ocxenu"
>
> kernel = "……./xenU-vmlinuz"
>
> ramdisk = "………/initrd"
>
> memory = 64
>
> name = "<hostname>"
>
> disk = ['file……..img,hda1,w','file……...img,hda2,w']
>
> root = "/dev/hda1 ro"
>
> #
>
> vif = ['mac=AA:00:00:18:94:FB']
>
> and /etc/fstab on the domU is
>
> # Begin /etc/fstab
>
> # <file system> <mount point>   <type>  <options>
>
>
> /dev/hda1       /       ext3
> defaults,errors=remount-ro,node=1       0
>
> /dev/hda2       swap    swap    sw,node=1       0       0
>
> proc    /proc   proc    defaults,node=* 0       0
>
> # End /etc/fstab
>
> Does anyone have any ideas as to where I've gone wrong?
Everything here looks fine. Check the ramdisk image.

If you like, I could probably compress down a domU and upload it
somewhere (probably to the XenStuff project on sourceforge).

-N

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