Re: [Xen-users] kernel panic when creating domainU

[Mark Williamson <mark.williamson@xxxxxxxxxxxx>]

On Wednesday 13 June 2007, andrea15@xxxxxx wrote:
> I used a file-backed VBD for the virtual disk of my VM.
> I formatted it
> as ext3, I mounted it in a directory and I copied directories from my
> linux-domain0 installation as a test.
> I used this configuration file:
> kernel = "/boot/vmlinuz-2.6.16.29-xen_3.0.3.0"
> ramdisk = "/boot/initrd-
> 2.6.16.29-xen_3.0.3.0.img"
> memory = 256
> name = "dominio1"
> vif = [ '' ]

You don't have a disk = line in there - you need one or it won't see any disks 
to boot off.

Also, you should be aware that kernel= and ramdisk= fetch the kernel and 
ramdisk from Domain 0's filesystem, not from the guest's.  If you want to 
boot from a kernel in the guest's filesystem, take away the kernel= and 
ramdisk= options and you should get a bootloader coming up...

Probably best to tackle that problem after you've got the domain booting 
though - one problem to solve at a time.

> and this is the
> etc/fstab in my vm(perhaps I made some mistakes in it!?!):
> /home/sibilia/dominio1  /                       ext3    defaults

     ^ That's probably wrong.  I guess that's the path to the domain's virtual 
disk on dom0, right?  The virtual machine can't see the dom0 filesystem just 
it's virtual disks.

> 1 1
> proc                    /proc                   proc
> defaults        0 0
> sysfs                   /sys
> sysfs   defaults        0 0
> I've only cut some lines from the original
> /etc/fstab.
>
> Do you think It's a problem whit config files?

OK, change the GUEST fstab's first line to look like this:

/dev/sda1       /       ext3    defaults        1       1

sda1 will be the virtual disk the guest sees.

Now, to your domain config file (in domain 0), you should add:

disk = ['tap:aio:/home/sibilia/dominio1,sda1,w']

Now try booting the domain, does this work better?

Cheers,
Mark

-- 
Dave: Just a question. What use is a unicyle with no seat?  And no pedals!
Mark: To answer a question with a question: What use is a skateboard?
Dave: Skateboards have wheels.
Mark: My wheel has a wheel!

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