Re: [Xen-users] PVGrub can't find config file for domU on logical volume

["Matthew Law" <matt@xxxxxxxxxxxxxxxxxx>]

Sorry to reply to my own post, but still not making any progress with
this.  Here's my domU config file which is working with pyGrub.

#  -*- mode: python; -*-
name = "testvm"
vcpus = 1
memory = 1024
maxmem = 1024

# pygrub
bootloader = "/usr/bin/pygrub"
# end pygrub

# pvgrub
#kernel = "/usr/lib/xen/boot/pv-grub-x86_64.gz"
#extra = "(hd0,0)/boot/grub/menu.lst"
#end pvgrub

dhcp = "dhcp"

disk = [ "phy:/dev/VolGroupVM/testvm,xvda,w",
"phy:/dev/VolGroupVM/testvm-swap,xvdb,w" ]

vif = [
"mac=00:16:3e:00:00:12,ip=192.168.1.12,bridge=xenbr0,vifname=viftestvm" ]

on_poweroff = 'destroy'
on_reboot   = 'restart'
on_crash    = 'restart'

If I remove the pygrub bootloader line and un-comment the pvgrub entries I
always end up at the 'grubdom>' prompt.  If I then enter 'configfile =
(hd0,0)/boot/grub/mennu.lst' pvgrub works and I can boot the domU
successfully.

I'd be really grateful if anyone can offer any advice?

Thanks in advance,

Matt.

On Sat, December 5, 2009 4:09 pm, Matthew Law wrote:
> After hours of googling and not really finding a definitive solution to my
> problem, I'm a little stuck and would really appreciate some help from
> others.
>
> I have a CentOS 5.4 x86-64 server running Xen 3.3 from the gitco repos as
> dom0.  On this I have created two logical volumes comprising 8GB for the
> system disk (xvda) and 1.5GB for swap (xvdb).  I ran mkfs.ext3 and mkswap
> on these to create the required filesystems and then I mounted the 8GB
> volume and copied a system image onto it.  After creating the xen config
> and starting it with pygrub the machine starts and runs without error - so
> far, so good!
>
> Now, If I shutdown the vm and change the config to use pvgrub and restart
> I am stuck at a grub prompt.  If I manually tell it where to find the
> config file (using the exact same path as in the 'extra' line in the domu
> config) it pvgrub starts and everything then runs as expected.  Here is my
> config:
>
> --- snip ---
> name = "pvgrubtestvm"
> vcpus = 1
> memory = 512
> maxmem = 512
>
> # pvgrub
> kernel = "/usr/lib/xen/boot/pv-grub-x86_64.gz"
> extra = "(hd0)/boot/grub/menu.lst"
> #end pvgrub
>
> dhcp = "dhcp"
>
> disk = [ "phy:/dev/VolGroupVM/pvgrubtestvm,xvda1,w",
> "phy:/dev/VolGroupVM/pvgrubtestvm-swap,xvda2,w" ]
>
> vif = [
> "mac=00:16:3e:00:00:09,ip=192.168.1.12,bridge=xenbr0,vifname=vifpvgrubtestvm"
> ]
>
> on_poweroff = 'destroy'
> on_reboot   = 'restart'
> on_crash    = 'restart'
> --- snip ---
>
> Have I done something wrong? Is this an issue with pvgrub and logical
> volumes - i.e. no partition table?



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