LXC change VM ID

[serverx]

Hello, i need to move some LXC vm between hosts but the destination host have already some vm with same IDs..... somebody know how to change the lxc vm ids ?
Thanks

 

[tom]

via Backup/Restore.

 

[serverx]

hello, i tried to move the vm 107 to different host, but the ID 107 do not change..... how to do ?
Thanks

 

[dcsapak]

you have to do a backup of your container, then transfer the vzdump-lxc-* file to the new host, and there you have to restore it under a different id

 

[serverx]

tried but the restore popup do not asking the new id

 

[dcsapak]

try under the storage -> content -> backup file
instead

 

[serverx]

done it worked....
the procedure for the kvm vm is same?
thaks

 

[Benoît Fontaine]

I know it's an old topic but this could help someone :


EXAMPLE : rename an LXC container from 100 to 101
1- Be sure there are NO VM with the target id (here 101)
2- Please be CARREFUL, be sure you know what you are doing and check every line and name that it is correct (do not use the names in my example)
3- Stop the container
4- Open host shell
5- Rename the disks :

zfs rename tank/subvol-100-disk-0 tank/subvol-101-disk-0

and so on for each disk
6- Edit the configuration file in /etc/pve/lxc/100.conf to correct the disks names (eg 100 to 101)
7- Rename the configuration file :

mv /etc/pve/lxc/100.conf /etc/pve/lxc/101.conf

8- Go to the web UI, the change should be seen soon

Tested on PVE 5.4
Also consider that I have not tested with a VM that has snapshots for replication, but I GUESS it only needs to rename the disks AND snapshots on all the nodes involved, then edit the configuration file in /etc/pve/replication.cfg.

 

[tok1]

For future reference, Benoît's guide still works with PVE 8.1. One minor addition as I experienced this myself:

6a. If existing, move the relevant firewall config file too:

mv /etc/pve/firewall/100.fw /etc/pve/firewall/101.fw

Regards

 

[TheRealMaN_]

What if I have ext4 fs, how to rename disks?

lvrename pve vm-100-disk-0 vm-101-disk-0