[Xen-users] How can I boot using pv-grub?

[Joe Julian <joe@xxxxxxxxxxxxxxxx>]

I'm trying to figure out how to get pv-grub to work in OpenStack on 
Fedora 17's xen-4.1.2 packaging. I added pv-grub-x86_64.gz from the 
package as a kernel in glance (becoming 
/var/lib/nova/instances/instance-0000001b/kernel in this example). 
OpenStack created this vm definition:
<domain type='xen' id='21'>
  <name>instance-0000001b</name>
  <uuid>8a5231bc-6535-468e-8585-60a55c9073d9</uuid>
  <memory unit='KiB'>2097152</memory>
  <currentMemory unit='KiB'>2097152</currentMemory>
  <vcpu>1</vcpu>
  <bootloader></bootloader>
  <os>
    <type>linux</type>
    <kernel>/var/lib/nova/instances/instance-0000001b/kernel</kernel>
    <cmdline>root=/dev/xvda ro</cmdline>
  </os>
  <clock offset='utc' adjustment='reset'/>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>restart</on_reboot>
  <on_crash>destroy</on_crash>
  <devices>
    <emulator>/usr/lib/xen/bin/qemu-dm</emulator>
    <disk type='file' device='disk'>
      <driver name='file'/>
      <source file='/var/lib/nova/instances/instance-0000001b/disk'/>
      <target dev='sda' bus='scsi'/>
    </disk>
    <disk type='file' device='disk'>
      <driver name='file'/>
      <source file='/var/lib/nova/instances/instance-0000001b/disk.local'/>
      <target dev='sdb' bus='scsi'/>
    </disk>
    <interface type='bridge'>
      <mac address='fa:16:3e:30:64:90'/>
      <source bridge='br_private'/>
      <script path='/etc/xen/scripts/vif-bridge'/>
      <target dev='vif21.0'/>
    </interface>
    <console type='pty' tty='/dev/pts/5'>
      <source path='/dev/pts/5'/>
      <target type='xen' port='0'/>
    </console>
    <input type='mouse' bus='xen'/>
    <graphics type='vnc' port='5901' autoport='yes' listen='127.0.0.1' 
keymap='en-us'>
      <listen type='address' address='127.0.0.1'/>
    </graphics>
  </devices>
</domain>

I boot to the console and see grub, but it doesn't recognize the 
partition table on (hd0): "Error 5: Partition table invalid or corrupt", 
nor the filesystem on (hd1): "Filesystem type unknown, using whole disk".
The files are qcow2 images with raw backing files. The first disk has 
two msdos partitions, the first partition is the ext3 /boot partition 
that I'm trying to use.
I also noticed that qemu-dm doesn't show either of the files open in lsof.

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