2024-02-29
Mount LVM Virtual Machine Disk Image From External Drive
WesleyBallard.com

01: Install lvm2
  sudo apt install lvm2

02: Load the necessary modules as root:
  sudo modprobe dm-mod

03: Scan your system for LVM volumes and identify in the output the volume
      group name that has the name of your volume. It will likly be listed
      as an exported volume group.
  sudo vgscan

04: Import the LVM if it is exported
  sudo vgimport VOLUME-GROUP-NAME

05: Activate the volume:
  sudo vgchange -ay VOLUME-GROUP-NAME

06: List the logical volumes and find the name of the disk you want.
  sudo lvs

08: Use 'dd' to copy the logical disk image to an iso file.
    Doing this step is optional.
    sudo dd if=/dev/pve/vm-114-disk-0 of=~/Downloads/vm-114-disk-0.iso

09: Create a mount point for the disk image.
  sudo mkdir ~/lvmmount

10: Use the 'guestmount' application to mount the root filesystem inside the iso.
    sudo guestmount -a ~/Downloads/vm-114-disk-0.iso -i --ro -o allow_other ~/lvmmount/

11: Umount the VM Disk Image
  sudo guestunmount ~/lvmmount

12: Set the volume group to not active
  sudo vgchange -an VOLUME-GROUP-NAME

13: Export the LVM 
  sudo vgexport VOLUME-GROUP-NAME