Privilege converter - backup succeeded AND failed

[Stooovie]

✅ Have you read and understood the above guidelines?

yes

📜 What is the name of the script you are using?

PVE Privilege Converter

📂 What was the exact command used to execute the script?

bash -c "$(curl -fsSL https://raw.githubusercontent.com/community-scripts/ProxmoxVE/main/tools/pve/pve-privilege-converter.sh)"

⚙️ What settings are you using?

• Default Settings
• Advanced Settings

🖥️ Which Linux distribution are you using?

Debian 12

📝 Provide a clear and concise description of the issue.

I run the command, pick a LXC, the last lines say:

INFO: cleanup temporary 'vzdump' snapshot
  Logical volume "snap_vm-108-disk-0_vzdump" successfully removed.
INFO: Finished Backup of VM 108 (00:08:59)
INFO: Backup finished at 2025-06-14 19:02:26
INFO: Backup job finished successfully
INFO: notified via target `proxmobo-webhook`
INFO: notified via target `mail-to-root`
  ✖️   Backup failed

and the script stops. There's 700 GB free on my Proxmox Backup Server, the entire NC is 90 GB. There is no other indication of any error, but the script fails.

🔄 Steps to reproduce the issue.

Step 1: run Privilege Converter on a Nextcloud LXC
Step 2: it fails

❌ Paste the full error output (if available).

📦 Backing up container 108
INFO: starting new backup job: vzdump 108 --compress zstd --mode snapshot --storage pbs
INFO: Starting Backup of VM 108 (lxc)
INFO: Backup started at 2025-06-14 18:53:27
INFO: status = running
INFO: CT Name: nc
INFO: including mount point rootfs ('/') in backup
INFO: backup mode: snapshot
INFO: ionice priority: 7
INFO: create storage snapshot 'vzdump'
WARNING: You have not turned on protection against thin pools running out of space.
WARNING: Set activation/thin_pool_autoextend_threshold below 100 to trigger automatic extension of thin pools before they get full.
Logical volume "snap_vm-108-disk-0_vzdump" created.
WARNING: Sum of all thin volume sizes (1.61 TiB) exceeds the size of thin pool storage/storage and the size of whole volume group (931.51 GiB).
INFO: creating Proxmox Backup Server archive 'ct/108/2025-06-14T16:53:27Z'
INFO: set max number of entries in memory for file-based backups to 1048576
INFO: run: lxc-usernsexec -m u:0:100000:65536 -m g:0:100000:65536 -- /usr/bin/proxmox-backup-client backup --crypt-mode=none pct.conf:/var/tmp/vzdumptmp1438267_108/etc/vzdump/pct.conf root.pxar:/mnt/vzsnap0 --include-dev /mnt/vzsnap0/./ --skip-lost-and-found --exclude=/tmp/?* --exclude=/var/tmp/?* --exclude=/var/run/?*.pid --backup-type ct --backup-id 108 --backup-time 1749920007 --entries-max 1048576 --repository root@pam@192.168.0.199:usbbackup
INFO: Starting backup: ct/108/2025-06-14T16:53:27Z
INFO: Client name: pve
INFO: Starting backup protocol: Sat Jun 14 18:53:27 2025
INFO: Downloading previous manifest (Sat Jun 14 18:42:36 2025)
INFO: Upload config file '/var/tmp/vzdumptmp1438267_108/etc/vzdump/pct.conf' to 'root@pam@192.168.0.199:8007:usbbackup' as pct.conf.blob
INFO: Upload directory '/mnt/vzsnap0' to 'root@pam@192.168.0.199:8007:usbbackup' as root.pxar.didx
INFO: processed 10.489 GiB in 1m, uploaded 6.326 MiB
INFO: processed 20.179 GiB in 2m, uploaded 6.326 MiB
INFO: processed 30.362 GiB in 3m, uploaded 6.326 MiB
INFO: processed 39.161 GiB in 4m, uploaded 103.551 MiB
INFO: processed 48.748 GiB in 5m, uploaded 103.551 MiB
INFO: processed 60.681 GiB in 6m, uploaded 103.551 MiB
INFO: processed 71.327 GiB in 7m, uploaded 103.551 MiB
INFO: processed 81.744 GiB in 8m, uploaded 103.551 MiB
INFO: root.pxar: had to backup 170.26 MiB of 93.636 GiB (compressed 25.11 MiB) in 535.82 s (average 325.385 KiB/s)
INFO: root.pxar: backup was done incrementally, reused 93.47 GiB (99.8%)
INFO: Uploaded backup catalog (14.807 MiB)
INFO: Duration: 536.54s
INFO: End Time: Sat Jun 14 19:02:24 2025
INFO: prune older backups with retention: keep-daily=2, keep-monthly=1
INFO: running 'proxmox-backup-client prune' for 'ct/108'
INFO: pruned 1 backup(s) not covered by keep-retention policy
INFO: cleanup temporary 'vzdump' snapshot
Logical volume "snap_vm-108-disk-0_vzdump" successfully removed.
INFO: Finished Backup of VM 108 (00:08:59)
INFO: Backup finished at 2025-06-14 19:02:26
INFO: Backup job finished successfully
INFO: notified via target proxmobo-webhook
INFO: notified via target mail-to-root
✖️ Backup failed

🖼️ Additional context (optional).

No response

[MickLesk]

You has Run into LXC or Host?

[Stooovie]

Host, as instructed.

[MickLesk]

Ah you save to PBS? Its developed for local storages. I dont have pbs at Test, i can develop an Feature/fix but you need to test it

[MickLesk]

Can you try the develop Script?

bash -c "$(curl -fsSL https://raw.githubusercontent.com/community-scripts/ProxmoxVED/main/tools/pve/pve-privilege-converter.sh)"

[MickLesk]

@Stooovie can you test it please?

[Stooovie]

Doesn't work, here's the last few lines:

Suggested next free container ID: 102. Enter new container ID [default: 102]: 
🛠️ Restoring as privileged container
recovering backed-up configuration from 'ct/115/2025-06-16T15:33:59Z'
unable to restore CT 102 - can't find file 'ct/115/2025-06-16T15:33:59Z'

I was backing up to PBS (that is successful) and restoring to the original storage pool with a new ID.

[MickLesk]

Then i can deploy tomorrow another Version, but you need to test it again, without pbs i cannot Test it

[Stooovie]

no problem, thanks!

[MickLesk]

i changed the restore function, can you check again? (VED call above)

[oOStroudyOo]

To confirm, this also failed for me on PBS but worked fine on local storage.

[Stooovie]

i changed the restore function, can you check again? (VED call above)

Still not working:

Suggested next free container ID: 120. Enter new container ID [default: 120]: 
🛠️ Restoring as privileged container
Unknown option: repository
400 unable to parse option
pct restore <vmid> <ostemplate> [OPTIONS]
  ✖️   Conversion failed

[MickLesk]

PBS is so an Shit Tool 😄

I cannot fix this, without this Tool. So i remove the Option for PBS and Mark this on Website. Otherwise another Dude with pbs take a Look

[Stooovie]

no worries :)