[SOLVED] Backup Restore // TASK ERROR: unable to restore CT 102 - no such logical volume pve/vm-102-disk-0

[Skream]

Hello all,

unfurtunately, I've had some issues while upgrading from PVE 6.4 to PVE 7, so I decided to install PVE 7 from scratch. I created backups of all LXCs and VMs and saved them on a PBS (V 2.0-4). Of course, I saved network configuration, storage.cfg and the config files of the LXCs and VMs as well.

After initial setup of PVE 7, I wanted to restore the LXCs, but unfortunatley, the restore process ended with
"TASK ERROR: unable to restore CT XXX- no such logical volume pve/vm-XXX-disk-0"
(replace XXX by LXC-ID).

Originally, the LXCs were stored on local-lvm and the virtual disk ist configured in the LXC config files (rootfs). However, the virtual disks are not shown in local-lvm --> CT volumes.

So my "stupid" question is: How can I restore my backup LXCs?

I have only one VM to restore (OpenMediaVault with 2.5TB, so it will take a while...), the process is currently running and the VM Disk is shown in local-lvm --> VM Disks.

Thanks a lot in advance for your help!
If you need any more information, feel free to ask.

EDIT:
I just took a deeper look into the log of the restore process:

recovering backed-up configuration from 'PBS:backup/ct/102/2022-06-17T21:00:19Z'

  Logical volume "vm-102-disk-0" created.

Creating filesystem with 2097152 4k blocks and 524288 inodes

Filesystem UUID: 665ea033-2387-4d07-ac2a-05807a63cc02

Superblock backups stored on blocks:

    32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632

  Logical volume "vm-102-disk-0" successfully removed

TASK ERROR: unable to restore CT 102 - no such logical volume pve/vm-102-disk-0

If I get that correcty, a logical volume is created in the first step, is getting removed right afterwards and in the end, the process stops since there is no logical volume available?

BR, Skream

 

[fiona]

Hi,
there's likely an error happening in between, after which restore aborts and cleans up the image again. Please share the backed up configuration and the output of pveversion -v and cat /etc/pve/storage.cfg. I assume you're restoring via UI to local-lvm again?

 

[Skream]

Hi Fabian,

thanks for your response. Luckily, I was able to solve the problem in the meantime

I think my fault was as follows: I restored the Conf-files of the LXCs to have like an empty shell which I could use the restore function for (click on LXC in UI --> Backup --> Restore). This procedure ended up with the message I already mentioned in my previous post.

How did I fix it?
Luckily, the PBS was already bound to PVE, so I could click on the storage and see all backup files. I deleted all Conf-Files of the LXC, clicked on PBS (storage) and used the restore function offered in PBS storage. I just had to make sure that the LXC will be restored to local-lvm and not to my Raid 1. Finally, all my VMs and LXCs got restored successfully and are up and running again!

BR, Skream