Xen users - Jul 2012 - RuntimeError: Unable to find partition containing kernel

Hardware:
2x Intel Xeon Quad-Core 2.33GHz
24GB FBDIMM RAM
2x 2TB HDD in RAID-1
Intel Server Board S5400SF

Setup:
Arch Linux x86_64
Xen 4.1.2
Grub2 Multiboot

Synopsis:
I set up a new VM for Debian Squeeze following instructions here:
http://www.howtoforge.com/installing-debian-squeeze-6.0-domu-on-centos-5.5-x86_64-dom0.
Partitioning & installation completed correctly. When I tried to run the
VPS afterwards, I got this output:
| [root@srv0 xen]# xm create -c /etc/xen/xm-debian.cfg
| Using config file "/etc/xen/xm-debian.cfg".
| Error: Boot loader didn''t return any data!
I''ve attached a more complete log output at the end of the mail.
This is the first VM I have tried to create on this setup.

Additional:
I can mount the partition within the lvm:
| [root@srv0 xen]# kpartx -av /dev/VPS/fennec
| add map VPS-fennec1 (253:2): 0 83881984 linear /dev/VPS/fennec 2048
| [root@srv0 xen]# mount /dev/mapper/VPS-fennec1 /mnt
| [root@srv0 xen]# cd /mnt
| [root@srv0 mnt]# ls
| bin   etc      lib     lost+found  opt   sbin     sys  var
| boot  home      lib32  media         proc  selinux  tmp  vmlinuz
| dev   initrd.img  lib64  mnt         root  srv        usr
| [root@srv0 mnt]# cd boot
| [root@srv0 boot]# ls
| config-2.6.32-5-amd64  initrd.img-2.6.32-5-amd64  vmlinuz-2.6.32-5-amd64
| grub               System.map-2.6.32-5-amd64
| initrd               vmlinuz
| [root@srv0 boot]# cd grub
| [root@srv0 grub]# cat menu.lst
| timeout 5
| default 0
|
| title Linux
| kernel /boot/vmlinuz root=/dev/xvda1
| initrd /boot/initrd
As you can see, the kernel (which is 2.6.32) and vmlinuz (also 2.6.32)
exist in the /boot directory.

Pygrub:
Attempting to pygrub the VPS LVM gives the following output:
| [root@srv0 /]# pygrub --kernel=/boot/vmlinuz --ramdisk=/boot/initrd
/dev/VPS/fennec
| Traceback (most recent call last):
|   File "/usr/bin/pygrub", line 774, in <module>
|     raise RuntimeError, "Unable to find partition containing kernel"
| RuntimeError: Unable to find partition containing kernel

domU Config File:
| name = "fennec"
| memory = 1024
| maxmem = 1024
| cpus = "2-7"
| disk = [
|     ''phy:/dev/VPS/fennec,xvda,w'',
|     ''phy:/dev/VPS/fennec-swap,xvdb,w''
| ]
| vif = ['''']
| bootloader = "pygrub"
| bootargs = "--kernel=/boot/vmlinuz --ramdisk=/boot/initrd"
I have tried this with and without the bootargs line without any success.

About The Filesystem:
/dev/VPS is a vg on a RAID-1 array
/dev/VPS/fennec is an lv on VPS vg
The fennec lv has a single ext3 partition of 40GB

xend.log Output:
[2012-07-20 09:35:17 907] DEBUG (XendDomainInfo:103)
XendDomainInfo.create([''vm'', [''name'',
''fennec''], [''memory'', 1024],
[''maxmem'', 1024], [''on_xend_start'',
''ignore''], [''on_xend_stop'',
''ignore''],
[''vcpus'', 1], [''cpus'',
''2-7''], [''oos'', 1],
[''bootloader'',
''/usr/bin/pygrub''], [''bootloader_args'',
''--kernel=/boot/vmlinuz
--ramdisk=/boot/initrd''], [''image'',
[''linux'', [''videoram'', 4],
[''tsc_mode'',
0], [''nomigrate'', 0]]], [''s3_integrity'', 1],
[''device'', [''vbd'',
[''uname'',
''phy:/dev/VPS/fennec''], [''dev'',
''xvda''], [''mode'', ''w'']]],
[''device'',
[''vbd'', [''uname'',
''phy:/dev/VPS/fennec-swap''], [''dev'',
''xvdb''], [''mode'',
''w'']]], [''device'',
[''vif'']]])
[2012-07-20 09:35:17 907] DEBUG (XendDomainInfo:2498)
XendDomainInfo.constructDomain
[2012-07-20 09:35:17 907] DEBUG (balloon:187) Balloon: 22794808 KiB free;
need 16384; done.
[2012-07-20 09:35:17 907] DEBUG (XendDomain:476) Adding Domain: 17
[2012-07-20 09:35:17 907] DEBUG (XendDomainInfo:2836)
XendDomainInfo.initDomain: 17 256
[2012-07-20 09:35:17 25157] DEBUG (XendBootloader:113) Launching bootloader
as [''/usr/bin/pygrub'',
''--output=/var/run/xend/boot/xenbl.15844'',
''--kernel=/boot/vmlinuz'',
''--ramdisk=/boot/initrd'',
''/dev/VPS/fennec''].
[2012-07-20 09:35:17 907] ERROR (XendBootloader:214) Boot loader didn''t
return any data!
[2012-07-20 09:35:17 907] ERROR (XendDomainInfo:488) VM start failed
Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/xen/xend/XendDomainInfo.py",
line
474, in start
    XendTask.log_progress(31, 60, self._initDomain)
  File "/usr/lib/python2.7/site-packages/xen/xend/XendTask.py", line
209,
in log_progress
    retval = func(*args, **kwds)
  File "/usr/lib/python2.7/site-packages/xen/xend/XendDomainInfo.py",
line
2838, in _initDomain
    self._configureBootloader()
  File "/usr/lib/python2.7/site-packages/xen/xend/XendDomainInfo.py",
line
3285, in _configureBootloader
    bootloader_args, kernel, ramdisk, args)
  File "/usr/lib/python2.7/site-packages/xen/xend/XendBootloader.py",
line
215, in bootloader
    raise VmError, msg
VmError: Boot loader didn''t return any data!
[2012-07-20 09:35:17 907] DEBUG (XendDomainInfo:3071)
XendDomainInfo.destroy: domid=17
[2012-07-20 09:35:17 907] DEBUG (XendDomainInfo:2406) No device model
[2012-07-20 09:35:17 907] DEBUG (XendDomainInfo:2408) Releasing devices
[2012-07-20 09:35:17 907] ERROR (XendDomainInfo:108) Domain construction
failed
Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/xen/xend/XendDomainInfo.py",
line
106, in create
    vm.start()
  File "/usr/lib/python2.7/site-packages/xen/xend/XendDomainInfo.py",
line
474, in start
    XendTask.log_progress(31, 60, self._initDomain)
  File "/usr/lib/python2.7/site-packages/xen/xend/XendTask.py", line
209,
in log_progress
    retval = func(*args, **kwds)
  File "/usr/lib/python2.7/site-packages/xen/xend/XendDomainInfo.py",
line
2838, in _initDomain
    self._configureBootloader()
  File "/usr/lib/python2.7/site-packages/xen/xend/XendDomainInfo.py",
line
3285, in _configureBootloader
    bootloader_args, kernel, ramdisk, args)
  File "/usr/lib/python2.7/site-packages/xen/xend/XendBootloader.py",
line
215, in bootloader
    raise VmError, msg
VmError: Boot loader didn''t return any data!

Appreciate any suggestions.


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