[Pkg-xen-devel] Trying to upgrade domU to squeeze

[Paul van der Vlis]

Ian Campbell schreef:
> On Sun, 2010-12-05 at 19:58 +0100, Paul van der Vlis wrote:
>> Hello,
>>
>> Not sure this is the right place to ask Xen user-questions.
>>
>> I am running Lenny and try to upgrade a domU to Squeeze.
>>
>> After the installation of a new xen-kernel in the domU and upgrading
>> udev I did a reboot but then the kernel does not find the root anymore,
>> and it's dropping me to a shell. When I look into /dev/ I don't see any
>> disks or partions.
> 
> Which kernel flavour were you running under Lenny -686-bigmem or
> -xen-686?

xen-amd64.

> Similarly do you know which one you got upgraded to with Squeeze?

linux-image-2.6.32-5-xen-amd64

> I think what has happened is that a) the driver name changed from the
> Lenny -xen-686 flavour due to change from classic-Xen kernel patches to
> pvops and/or b) the configuration changed from builtin to module between
> Lenny and Squeeze.

I found the device /dev/sda1 was renamed to /dev/xvda1.
After changing grub it does work now!

> Anyway, it seems likely that your ramdisk has ended up without the disk
> driver. If you are able to boot using a fallback kernel or mount the
> root filesystem with a combination of loopback and/or kpartx then you
> should be able to regenerate an initrd containing the xen-blkfront.ko
> driver by adding it explicitly to /etc/initramfs-tools/modules.
>
>> Another question:
>> Is it better to use a xen-kernel for a domU, or can I use a normal one?
> 
> My recommendation would be to use the normal flavours (-686-bigmem or
> -and64) in domU if you can and only use the Xen flavours (-xen-686 or
> -xen-amd64) if you find there are features missing in the normal images.

Thanks for your advice & help!


With regards,
Paul van der Vlis.




-- 
http://www.vandervlis.nl/