pve copy & merge VM node from old disk

• TODO
• You can use web backup and restore always
• Let’s go
  • Link the old disk to your new PVE machine
  • Mount old disk
    • Scan your lvm disk
      • Identify the old and new disk
      • Rename the old one
    • Active the old pve disk
    • Locathe the disk of your old VM
  • Dump the old disk to qcow2 format
  • Create a new VM node in your system
  • Attach the vm disk in the webgui
  • Maybe old pve setting in old_disk/var/lib/pve-cluster/config.db

TODO

• Copy the old vm config from the disk
• Copy the lxc and config from the disk
• Add real bash log

You can use web backup and restore always

When the old system can not boot up, it will not be a good way.

NOTE:

• 1 disk
• LVM

Let’s go

Link the old disk to your new PVE machine

Mount old disk

Scan your lvm disk

# vgscan 

You can find your new and old lvm disk, if they has same name, you may need rename the old lvm name.

Identify the old and new disk

record the UUID of the old disk

# vgdisplay

Rename the old one

vgrename UUID_old_disk new_vg_name

Active the old pve disk

vgchange  -a y new_vg_name

Locathe the disk of your old VM

you will find your vm node disk in /dev/new_vg_name/vm_1xx_disk_0

Dump the old disk to qcow2 format

qemu-img convert -f -O qcow2 /dev/new_vg_name/vm_1xx_disk_0 vm_1xx_disk.qcow2

Create a new VM node in your system

Do not create vm disk, and use the command to import the above disk image

qm importdisk new_vm_id  vm_1xx_disk.qcow2  local-lvm

Attach the vm disk in the webgui

You may need to modify your vm setting to adjust the old disk, such as disk bus, mac and so on

Maybe old pve setting in old_disk/var/lib/pve-cluster/config.db

Enjoy it.