[PVE-User] converting privileged CT to unprivileged

[Adam Weremczuk]

Hi all,

PVE 5.4.6.

My container was created as privileged and runs on zfs pool shared by 2 
hosts.

I've unsuccessfully tried to convert it from GUI:
- stopped the container
- took a backup
- clicked "restore" ("unprivileged" ticked - default)

extracting archive 
'/var/lib/vz/dump/vzdump-lxc-100-2019_07_31-16_15_48.tar.lzo'
tar: ./var/spool/postfix/dev/urandom: Cannot mknod: Operation not permitted
tar: ./var/spool/postfix/dev/random: Cannot mknod: Operation not permitted
Total bytes read: 619950080 (592MiB, 42MiB/s)
tar: Exiting with failure status due to previous errors
TASK ERROR: unable to restore CT 100 - command 'lxc-usernsexec -m 
u:0:100000:65536 -m g:0:100000:65536 -- tar xpf - --lzop --totals 
--one-file-system -p --sparse --numeric-owner --acls --xattrs 
'--xattrs-include=user.*' '--xattrs-include=security.capability' 
'--warning=no-file-ignored' '--warning=no-xattr-write' -C 
/var/lib/lxc/100/rootfs --skip-old-files --anchored --exclude './dev/*'' 
failed: exit code 2

CT 100 completely disappeared from the list!

Earlier attempt from shell (105 was the first available ID):

pct restore 105 
/var/lib/vz/dump/vzdump-lxc-100-2019_07_31-16_15_48.tar.lzo 
-ignore-unpack-errors 1 -unprivileged
400 Parameter verification failed.
storage: storage 'local' does not support container directories
pct restore <vmid> <ostemplate> [OPTIONS]

Any hints?

Thanks,
Adam