Re: [Xen-users] Xen noob question, ttylinux, Jailtime, etc

[wookie <wookie@xxxxxxxxxxxx>]

Chris 'Xenon' Hanson wrote:
>   So, I'm experimenting with setting up templated DomUs using Xen, and I wanted 
> to try out
> some of the Jailtime.org images, so I grabbed an Ubuntu 8.04 LTS 32-bit image.
>
>   It supplies an image and a config file (which I tweaked for the location of 
> the .img):
>
> -rw-r--r-- 1 root root 1049624576 2008-07-16 22:39 
> /etc/xen/images/ubuntu.8-04.64.img
>
>
> kernel = "/boot/vmlinuz-2.6-xen"
> memory = "256"
> name = "ubuntu.8-04"
> vif = ['']
> dhcp = "dhcp"
> disk = ['file:/etc/xen/images/ubuntu.8-04.64.img,sda1,w']
> root = "/dev/sda1 ro"
>
>   When I try to boot it:
>
>  xm create /etc/xen/configs/ubuntu.8-04.64.xen3.cfg -c
> Using config file "/etc/xen/configs/ubuntu.8-04.64.xen3.cfg".
> Error: Kernel image does not exist: /boot/vmlinuz-2.6-xen
>
>
>   Ok, so this comes down to an issue I don't quite understand -- the 
> bootstrapping the
> DomU guest kernel. Here the config says it's /boot/vmlinuz-2.6-xen
>
>   Well, if I mount the image and look into it, there's nothing in /boot at all.
>
>   Is this referring to a kernel in my Dom0's /boot? This wouldn't seem to make 
> sense, as
> you might have dozens of different DomUs of different varieties and versions of 
> Linux, and
> they could fight with each other in the Dom0's /boot namespace.
>
>   
It is looking for Dom0's /boot dir and thus kernel image. You don't have 
to use it, but that's what it is looking for presently.
also it is better to use "tap:aio:" instead of "file:" - cant remember 
why but google is your friend.
>   So, what namespace exactly is the kernel line referring to, and why isn't the 
> jailtime
> image happy about it?
>
>   I ran into the same issue trying to use the ttylinux image from here:
> http://blog.xen.org/index.php/2009/02/19/launch-domu-from-pre-built-image/
>
>   What should the kernel line read? Obviously "/boot/..." is a stand-in, but 
> for what?
>
>
>   Thanks in advance. I'm just missing this critical nugget of understanding.
>
>
>   
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