Xen devel - Feb 2005 - Newbie boot problem (root on logical volume?)

Hi all

Sorry for the newbie question.

I have installed xen-2.0.3 binary release over Fedora Core 3 2.6.9.

Xen boots, and XenLinux seems to start, but it can''t find the root 
partition, eventually failing looking for an NFS root.

My root file system is on a logical volume:

    kernel /vmlinuz-2.6.9-1.667 ro root=/dev/VolGroup01/LogVol00

from the straight Fedora boot.

So, the xen version is:

    module /vmlinuz-2.6.10-xen0 root=/dev/VolGroup01/LogVol00 ro 
console=tty0

Do I have to do anything special to use the logical volume?

Or am I barking up completely the wrong tree.

Thanks for any help
Roland



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On Fri, Feb 04, 2005 at 10:31:01AM +0200, Roland Paterson-Jones
wrote:
> Hi all
> 
> Sorry for the newbie question.
> 
> I have installed xen-2.0.3 binary release over Fedora Core 3 2.6.9.
> 
> Xen boots, and XenLinux seems to start, but it can''t find the root
> partition, eventually failing looking for an NFS root.
> 
> My root file system is on a logical volume:
> 
>    kernel /vmlinuz-2.6.9-1.667 ro root=/dev/VolGroup01/LogVol00
> 
> from the straight Fedora boot.
> 
> So, the xen version is:
> 
>    module /vmlinuz-2.6.10-xen0 root=/dev/VolGroup01/LogVol00 ro 
> console=tty0
> 
> Do I have to do anything special to use the logical volume?
Yes. Use an initrd. Create it with:
mkinitrd /boot/initrd-2.6.10-xen0.img 2.6.10-xen0 -v -f

Then add it to grub:
>    module /vmlinuz-2.6.10-xen0 root=/dev/VolGroup01/LogVol00 ro 
> console=tty0
     module /initrd-2.6.10-xen0.img

Before any of that, make sure you compiled the dom0 kernel with support
to device-mapper/lvm.

Regards,
Luciano Rocha


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Might this be the ext3 inclusion problem in configuration? I usually include
ext3 in kernel rather than
a module.

Himanshu
On Fri, Feb 04, 2005 at 09:50:01AM +0000, Luciano Miguel Ferreira Rocha
wrote:
> On Fri, Feb 04, 2005 at 10:31:01AM +0200, Roland Paterson-Jones wrote:
> > Hi all
> > 
> > Sorry for the newbie question.
> > 
> > I have installed xen-2.0.3 binary release over Fedora Core 3 2.6.9.
> > 
> > Xen boots, and XenLinux seems to start, but it can''t find the
root
> > partition, eventually failing looking for an NFS root.
> > 
> > My root file system is on a logical volume:
> > 
> >    kernel /vmlinuz-2.6.9-1.667 ro root=/dev/VolGroup01/LogVol00
> > 
> > from the straight Fedora boot.
> > 
> > So, the xen version is:
> > 
> >    module /vmlinuz-2.6.10-xen0 root=/dev/VolGroup01/LogVol00 ro 
> > console=tty0
> > 
> > Do I have to do anything special to use the logical volume?
> Yes. Use an initrd. Create it with:
> mkinitrd /boot/initrd-2.6.10-xen0.img 2.6.10-xen0 -v -f
> 
> Then add it to grub:
> >    module /vmlinuz-2.6.10-xen0 root=/dev/VolGroup01/LogVol00 ro 
> > console=tty0
>      module /initrd-2.6.10-xen0.img
> 
> Before any of that, make sure you compiled the dom0 kernel with support
> to device-mapper/lvm.
> 
> Regards,
> Luciano Rocha
> 
> 
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-- 
-------------------------------------------------------------------------
Himanshu Raj
PhD Student, GaTech (www.cc.gatech.edu/~rhim)
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On Fri, Feb 04, 2005 at 10:52:34AM -0500, Himanshu Raj
wrote:
> Might this be the ext3 inclusion problem in configuration? I usually
include ext3 in kernel rather than
> a module.
ext3, udev, dm_mod, dm_mirror, etc.

But ext3, specifically, would still allow to boot, with root mounted as
ext2 instead.

Regards,
Luciano Rocha


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