Xen: Howto mount lvm partition on host OS

After the install CentOS using xen. How do we mount the LVM partition?

1. Go to your xen domain directory.

2. Make device "loopN" point to your disk image

e.g. losetup /dev/loop0 disk.img

3. Create device map for the partitions of the disk image

kpartx -a /dev/loop0

Use lvs to see the partition information.

4. Scan volume group over all disk

vgscan

5. Activate the volume group

vgchange -ay VolGroup00

6. Then mount the partition

mount /dev/VolGroup00/LogVol00 ./mnt

Done!

And you might need to umount the LVM disk:

1. umount the directory

umount ./mnt

2. deactivate the volume group

vgchange -an VolGroup00

3. remove the partition information

kpartx -d /dev/loop0

4. Restore loop device

losetup -d /dev/loop0