Accessing data on guest lvm

for my KVM guests I use only LVM disks, I find it easy to use and administer.
Every time you running out of space you can resize your lvn volume.
Bus some days ago I moved some virtual servers to another physical Dom0(Host) and was a little bit confused – how to move lvm – DD was not the best idea.

There is always another way, here is my:
Very important! Shut-down virtual machine.

Install kpartx to handle partitioned LVM:

1

aptitude install kpartx

To access LVM volumes, you must rescan LVM with vgscan and activate the volume group on the partition (called vg0 by default) by using the vgchange -ay command:

1
2
3
4
5
6
7
8

kpartx -a /dev/vg0/guest56
vgscan
#Reading all physical volumes . This may take a while...
#Found volume group "vg0" using metadata type lvm2
vgchange -ay vg0now
# 12 logical volume(s) in volume group vg0 now active.
lvs
mount /dev/vg0/guest56 /mnt/

After working on it – release it:

1
2
3

umount /mnt/
vgchange -an vg0
kpartx -d /dev/vg0/guest56