[Xen-users] Unable to mount LVM - backed VBD

[rajarshi das <dazio_r@xxxxxxxxx>]

All,

 

I have a SLES10 system with the following volume groups:

 

1) /dev/volgrplinux :

                          logvolroot (lv)

                          logvolswap (lv)

 

2) /dev/volgrpguest :

                           logvol1 (lv)

 

I want to use the logvol1 as a lvm - backed vbd.

 

$ xm create -c xmexample.lvm-vbd

....

......

xvda: Loading dm-mod

unknown partition table

device-mapper: 4.5.0-ioctl (2005-10-04) initialised: dm-devel@xxxxxxxxxx

Loading dm-snapshot

Waiting for /dev/mapper/control to appear: ok

Loading jbd

Loading ext3

     Unable to find volume group "logvolroot"

 Waiting for device /dev/mapper/volgrplinux-logvolroot to appear: ........ not found -- exiting to /bin/sh

$

 

 

Following is the configuration file:

---------start of config file------------------------------

# Kernel image file and (optional) ramdisk (initrd).
kernel = "/boot/vmlinuz-xenpae"
ramdisk = "/boot/initrd-xenpae"

# Initial memory allocation (in megabytes) for the new domain.
memory = 64

# A name for your domain. All domains must have different names.
name = "ExampleDomain1"

vif = [ '' ]

disk = [ 'phy:volgrpguest/logvol1,volgrplinux/logvolroot,w' ]

#dhcp="dhcp"
# Set netmask.
#netmask=
# Set default gateway.
#gateway=
# Set the hostname.
#hostname= "vm%d" % vmid

# Set root device.
#root = "/dev/hda1 ro"
root = "/dev/mapper/volgrplinux-logvolroot ro"

# Sets runlevel 4.
extra = "4"
----------------end of config file------------------------

 

$ ls -l /dev/mapper

 

lrwxrwxrwx 1 root root 16 nov 14 18:11 control -> ../device-mapper

brw------- 1 root root 253,2 nov 15 9:59 volgrpguest-logvol1

brw------- 1 root root 253,0 nov 14 18:11 volgrplinux-logvolroot

brw------- 1 root root 253,1 nov 14 18:11 volgrplinux-logvolswap

 

 

 

 

Is there something in the configuration that prevents the logvolroot from being found?

 

Also, are there any additional modules that need to be modprobed (apart from dm-mod and dm-snapshot) when a domU starts up?

 

Please suggest how to fix this.

 

Thanks,

Rajarshi

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