Xen users - Feb 2007 - Booting Domain0 with LVM under CentOS

Hi Everyone,

I am trying to boot a CentOS 4.4 system with the Xen 64 bit kernel and
am failing because it seems that the Xen Kernel doesn''t support LVM

Also if you are CentOS and are happy to share your grub.conf, I''d much
appreciate it :)

Any ideas?

-- 
"I never look back darling, it distracts from the now", Edna Mode (The
Incredibles)

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

On 2/4/07, Devraj Mukherjee <devraj@gmail.com>
wrote:
> Hi Everyone,
>
> I am trying to boot a CentOS 4.4 system with the Xen 64 bit kernel and
> am failing because it seems that the Xen Kernel doesn''t support
LVM
It''s more likely a missing initrd module for your disk controller.
What messages appear during boot?
Did you run mkinitrd?

title Xen 3.0.4 (2.6.16-xen)
        root (hd0,0)
        kernel /xen.gz dom0_mem=256M
        module /vmlinuz-2.6.16-xen ro root=/dev/VolGroup00/LogVol00 init 3
        module /initrd-2.6.16.33-xen.img

jerry

-- 
"Pay no attention to that man behind the curtain!"

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

First, a couple general tips.
1. Don''t top-post (yes, like I''m doing now :-).
2. Reply to the list, not directly to me (or other posters).

On 2/5/07, Devraj Mukherjee <devraj@gmail.com>
wrote:
> I did not compile it, used the available binary packages and they did
> not come with the initrd files. Will try and build the packages.
Second, I didn''t suggest building the source... Looking down
further.....
> On 2/5/07, Jerry Amundson <jamundso@gmail.com> wrote:
> > On 2/4/07, Devraj Mukherjee <devraj@gmail.com> wrote:
> > > Hi Everyone,
> > >
> > > I am trying to boot a CentOS 4.4 system with the Xen 64 bit
kernel and
> > > am failing because it seems that the Xen Kernel doesn''t
support LVM
> >
> > It''s more likely a missing initrd module for your disk
controller.
> > What messages appear during boot?
> > Did you run mkinitrd?
See? Here (where you should have been replying anyway :-), I suggest
running mkinitrd.

jerry

-- 
"Pay no attention to that man behind the curtain!"

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

[my reply on topic is below]

kanour, please reply to lists, not directly to posters.

On 2/25/07, kanour-xen <xen@kanour.com> wrote:
> Jerry Amundson wrote:
> > On 2/4/07, Devraj Mukherjee <devraj@gmail.com> wrote:
> >> Hi Everyone,
> >>
> >> I am trying to boot a CentOS 4.4 system with the Xen 64 bit kernel
and
> >> am failing because it seems that the Xen Kernel doesn''t
support LVM
> >
> > It''s more likely a missing initrd module for your disk
controller.
> > What messages appear during boot?
> > Did you run mkinitrd?
> >
> > title Xen 3.0.4 (2.6.16-xen)
> >        root (hd0,0)
> >        kernel /xen.gz dom0_mem=256M
> >        module /vmlinuz-2.6.16-xen ro root=/dev/VolGroup00/LogVol00
init 3
> >        module /initrd-2.6.16.33-xen.img
> >
> > jerry
> >
> Just compile support for LVM into kernel. NOT MODULES!!!
Yes modules, NOT KERNEL!
This is why we have kernel modules. It''s a fine environment as-is, why
suggest such a thing as a kernel rebuild??

Here is another example of the deficiencies in the rpm install. The
vanilla kernel rpm install maintains a bootable system, so should the
kernel-xen rpm install. Period.
(Knowing what I do now, my time would have been better served suppling
patches to fix the problems, rather than posting the workaround all
these times...)

jerry

-- 
"Pay no attention to that man behind the curtain!"

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

Jerry Amundson wrote:
> [my reply on topic is below]
>
> kanour, please reply to lists, not directly to posters.
>
> On 2/25/07, kanour-xen <xen@kanour.com> wrote:
>> Jerry Amundson wrote:
>>> On 2/4/07, Devraj Mukherjee <devraj@gmail.com> wrote:
>>>> Hi Everyone,
>>>>
>>>> I am trying to boot a CentOS 4.4 system with the Xen 64 bit
kernel
>>>> and am failing because it seems that the Xen Kernel
doesn''t
>>>> support LVM
>>>
>>> It''s more likely a missing initrd module for your disk
controller.
>>> What messages appear during boot?
>>> Did you run mkinitrd?
>>>
>>> title Xen 3.0.4 (2.6.16-xen)
>>>        root (hd0,0)
>>>        kernel /xen.gz dom0_mem=256M
>>>        module /vmlinuz-2.6.16-xen ro root=/dev/VolGroup00/LogVol00
>>>        init 3 module /initrd-2.6.16.33-xen.img
>>>
>>> jerry
>>>
>> Just compile support for LVM into kernel. NOT MODULES!!!
>
> Yes modules, NOT KERNEL!
> This is why we have kernel modules. It''s a fine environment as-is,
why
> suggest such a thing as a kernel rebuild??
>
> Here is another example of the deficiencies in the rpm install. The
> vanilla kernel rpm install maintains a bootable system, so should the
> kernel-xen rpm install. Period.
> (Knowing what I do now, my time would have been better served suppling
> patches to fix the problems, rather than posting the workaround all
> these times...)
It does in the RedHat 4.92 beta distribution. Basically, the "grubby"
tool
that builds grub.conf entries needs to understand about Xen, and RedHat 
Enteprise 4.x is simply too old to have this feature. Rolling back the 4.92 
or the Fedora Core 6 versions of the grub and associated tools is feasible, 
but way too much work. If you want such tools in RedHat based releases,
I''m
afraid you need to pony up the money and have someone write them.

Wait a month or two: RedHat 5 is due out in March, and I''m sure CentOs
5
will follow almost immediately upon its release. 


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

On 2/25/07, Nico Kadel-Garcia <nkadel@gmail.com>
wrote:
> It does in the RedHat 4.92 beta distribution. Basically, the
"grubby" tool
> that builds grub.conf entries needs to understand about Xen, and RedHat
> Enteprise 4.x is simply too old to have this feature. Rolling back the 4.92
> or the Fedora Core 6 versions of the grub and associated tools is feasible,
> but way too much work. If you want such tools in RedHat based releases,
I''m
> afraid you need to pony up the money and have someone write them.
Nonsense. The grubby tool, and the /sbin/new-kernel-pkg script which
calls it, are part of mkinitrd-3.5.13.6-1 which even updated RHEL 3
includes.

The kernel-xen spec just took a short-cut only running mkinitrd,
whereas the kernel spec runs /sbin/new-kernel-pkg.

But all this just explains the lack of a grub.conf entry, not why the
resulting initrd fails to boot sometimes...

jerry

-- 
"Pay no attention to that man behind the curtain!"

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