Restore Issue

[nesrineTrimech]

Can you please help us about the below issue, i try to restore a backup container but i receive the below error, can you please provide us a solution.

Error: error extracting archive - error at entry "random": failed to create device node: Operation not permitted (os error 1)
TASK ERROR: unable to restore CT 156 - command 'lxc-usernsexec -m u:0:100000:65536 -m g:0:100000:65536 -- /usr/bin/proxmox-backup-client restore '--crypt-mode=none' ct/146/2024-10-06T23:00:02Z root.pxar /var/lib/lxc/156/rootfs --allow-existing-dirs --repository root@pam@172.16.20.21:BPS' failed: exit code 255

 

[fabian]

you are trying to restore a backup of a privileged container as unprivileged. this only works if the backup doesn't contain any entries that only work for privileged containers. the usual culprit is postfix with a chroot setup that contains device nodes. you can convert your container to not use postfix with such a configuration (including removing the device nodes), take another backup, and then you should be able to restore it as unprivileged.