[Libguestfs] LVM mounting issue

Исаев Виталий Анатольевич
Thu, 16 Jan 2014 15:57:50 -0000

Hello, It's me again with one more misunderstanding of libguestfs usage...
Guestfish (as well as python libguestfs module) refuse to mount logical volume
containing the root partition of the VM's filesystem.
According to this short
guide<http://rwmj.wordpress.com/2009/04/07/libguestfs-lvm-support/> I am
trying to mount /dev/vg_kojit/lv_root as "/", but nothing works:

[root@rhevh1 integrity]#
[root@rhevh1 integrity]#
[root@rhevh1 integrity]#
[root@rhevh1 integrity]# guestfish

Welcome to guestfish, the libguestfs filesystem interactive shell for
editing virtual machine filesystems.

Type: 'help' for help on commands
      'man' to read the manual
      'quit' to quit the shell

><fs> add /dev/dm-40
><fs> run
><fs> inspect_os
><fs> pvs
/dev/vda2
unknown device
><fs> lvs
/dev/vg_kojit/lv_root
/dev/vg_kojit/lv_swap
><fs> mount /dev/vg_kojit/lv_root /
libguestfs: error: mount: mount_stub: /dev/vg_kojit/lv_root: No such file or
directory
><fs>
><fs>

The actual information about VM's block devices can be seen on the
screenshot attached to this message. I would be grateful for your help
Sincerely,

Vitaly Isaev
Software engineer
Information security department
Fintech JSC, Moscow, Russia