Xen users - Dec 2007 - Ubuntu guest domain on Fedora host (dom0) domain

Hi,

I''m trying to install Ubuntu server as a guest on a Fedora host  
domain (dom0).

I don''t understand the functions of the guest''s initrd and the
guest''s kernel well enough to know which kernel I should be using.  
Should I use the Fedora based domU kernel (which matches the dom0  
one) or Ubuntu''s kernel?

If I install using debootstrap would I need to swap out the kernel  
provided with an Ubuntu one which has been xenified?

Thanks for any help.

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Hi,

I''m trying to install Ubuntu server as a guest on a Fedora host  
domain (dom0).

I don''t understand the functions of the guest''s initrd and the
guest''s kernel well enough to know which kernel I should be using.  
Should I use the Fedora based domU kernel (which matches the dom0  
one) or Ubuntu''s kernel?

If I install using debootstrap would I need to swap out the kernel  
provided with an Ubuntu one which has been xenified?

Thanks for any help.


_______________________________________________
Xen-users mailing list
Xen-users@lists.xensource.com
http://lists.xensource.com/xen-users

Julius Spencer schrieb:
> Hi,
> 
> I''m trying to install Ubuntu server as a guest on a Fedora host
domain
> (dom0).
> 
> I don''t understand the functions of the guest''s initrd
and the guest''s
> kernel well enough to know which kernel I should be using. Should I use
> the Fedora based domU kernel (which matches the dom0 one) or
Ubuntu''s
> kernel?
> 
> If I install using debootstrap would I need to swap out the kernel
> provided with an Ubuntu one which has been xenified?
Not neccessarily, if your fine with the fedora kernel, just copy
dom0''s /lib/modules/`uname -r` into the domU image.

I assume Ubuntu would run on fedora kernel. If you want to keep your domU
distro "clean", then I would suggest to
	- copy domU''s kernel and initrd at some place in dom0
or
	- keep it in domU and use pygrub

If you decide to use the recent ubuntu -xen kernel, disable the hwclock*
init scripts in domU and add

extra = ''xencons=tty''

to your domU cfg file, as the ubuntu kernel defaults to xvc0.

Regards,
Stephan

> 
> Thanks for any help.
> 
> 
> _______________________________________________
> Xen-users mailing list
> Xen-users@lists.xensource.com
> http://lists.xensource.com/xen-users

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Thank you for the reply.


>> I''m trying to install Ubuntu server as a guest on a Fedora
host
>> domain
>> (dom0).
>>
>> I don''t understand the functions of the guest''s
initrd and the
>> guest''s
>> kernel well enough to know which kernel I should be using. Should  
>> I use
>> the Fedora based domU kernel (which matches the dom0 one) or
Ubuntu''s
>> kernel?
>>
>> If I install using debootstrap would I need to swap out the kernel
>> provided with an Ubuntu one which has been xenified?
>>
> Not neccessarily, if your fine with the fedora kernel, just copy
> dom0''s /lib/modules/`uname -r` into the domU image.
>
I tried this first (using the fedora kernels and got this:

...
device-mapper: ioctl: 4.11.0-ioctl (2006-10-12) initialised:
dm-devel@redhat.com
md: md1 stopped.
Kernel panic - not syncing: Attempted to kill init!

Does this mean it is trying to find the disk but can''t find it?

>
> I assume Ubuntu would run on fedora kernel. If you want to keep  
> your domU
> distro "clean", then I would suggest to
> 	- copy domU''s kernel and initrd at some place in dom0
>
then I tried using an ubuntu xen kernel (putting it in the /boot dir of
the dom0 and chaging my config file) and got this:

...
[45911.512633] blkfront: sda1: barriers enabled
[45911.518792] netfront: device eth0 has copying receive path.
[45911.608257] Freeing unused kernel memory: 200k freed
[45911.810711] AppArmor: AppArmor initialized<5>audit(1197876779.830:2):
type=1505 info="AppArmor initialized" pid=990
[45911.818980] fuse init (API version 7.8)
[45911.825888] Failure registering capabilities with primary security  
module.
[45911.860654] thermal: Unknown symbol acpi_processor_set_thermal_limit
[45911.876324] device-mapper: ioctl: 4.11.0-ioctl (2006-10-12)
initialised: dm-devel@redhat.com

At this stage it just stops. I have to use Ctrl ] to get out of the
console. I''m not sure what would come next, but nothing happens.

> or
> 	- keep it in domU and use pygrub
>
I''m not sure how to do this yet so I haven''t atempted it.

> If you decide to use the recent ubuntu -xen kernel, disable the  
> hwclock*
> init scripts in domU and add
>
> extra = ''xencons=tty''
>
> to your domU cfg file, as the ubuntu kernel defaults to xvc0.
>
>
Regards,
Julius.



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