I have an NFS share setup on my Asustor NAS which I want to hold my backups.
I am having trouble getting them all to work.
I have 2 LXC's currently, Lyrion Music Server and Nginx proxy manager plus one VM, HAOS.
Backing up the Lyrion container works without error but backing up the Nginx container gives the following:
I'm struggling to get my mind around what the problem is.
I assume I have the share permissions set up OK because one CT backup succeeds?
I assume this won't stop it working but would speed it up and allow snapshots? Not sure how that would work in practice.
The main issue, as I understand it is all the Permission denied INFO reports near the end? Are they referring to ./var/*** in the tar file on the NAS? If so what permissions am I missing?
Any help appreciated.
I am having trouble getting them all to work.
I have 2 LXC's currently, Lyrion Music Server and Nginx proxy manager plus one VM, HAOS.
Backing up the Lyrion container works without error but backing up the Nginx container gives the following:
Code:
INFO: starting new backup job: vzdump 100 --notification-mode notification-system --node proxmoxve --notes-template '{{guestname}}' --remove 0 --mode snapshot --storage Proxmox_Nas_Share --compress zstd
INFO: Starting Backup of VM 100 (lxc)
INFO: Backup started at 2026-09-19 14:06:30
INFO: status = running
INFO: CT Name: nginxproxymanager
INFO: including mount point rootfs ('/') in backup
INFO: mode failure - some volumes do not support snapshots
INFO: trying 'suspend' mode instead
INFO: backup mode: suspend
INFO: ionice priority: 7
INFO: CT Name: nginxproxymanager
INFO: including mount point rootfs ('/') in backup
INFO: temporary directory is on NFS, disabling xattr and acl support, consider configuring a local tmpdir via /etc/vzdump.conf
INFO: starting first sync /proc/1416/root/ to /mnt/pve/Proxmox_Nas_Share/dump/vzdump-lxc-100-2026_09_19-14_06_30.tmp
INFO: first sync finished - transferred 3.94G bytes in 1424s
INFO: suspending guest
INFO: starting final sync /proc/1416/root/ to /mnt/pve/Proxmox_Nas_Share/dump/vzdump-lxc-100-2026_09_19-14_06_30.tmp
INFO: final sync finished - transferred 19.00M bytes in 55s
INFO: resuming guest
INFO: guest is online again after 55 seconds
INFO: creating vzdump archive '/mnt/pve/Proxmox_Nas_Share/dump/vzdump-lxc-100-2026_09_19-14_06_30.tar.zst'
INFO: tar: ./var/spool/postfix/hold: Cannot open: Permission denied
INFO: tar: ./var/spool/postfix/public: Cannot open: Permission denied
INFO: tar: ./var/spool/postfix/incoming: Cannot open: Permission denied
INFO: tar: ./var/spool/postfix/defer: Cannot open: Permission denied
INFO: tar: ./var/spool/postfix/trace: Cannot open: Permission denied
INFO: tar: ./var/spool/postfix/bounce: Cannot open: Permission denied
INFO: tar: ./var/spool/postfix/private: Cannot open: Permission denied
INFO: tar: ./var/spool/postfix/active: Cannot open: Permission denied
INFO: tar: ./var/spool/postfix/saved: Cannot open: Permission denied
INFO: tar: ./var/spool/postfix/maildrop: Cannot open: Permission denied
INFO: tar: ./var/spool/postfix/corrupt: Cannot open: Permission denied
INFO: tar: ./var/spool/postfix/flush: Cannot open: Permission denied
INFO: tar: ./var/spool/postfix/deferred: Cannot open: Permission denied
INFO: tar: ./var/lib/apt/lists/partial: Cannot open: Permission denied
INFO: tar: ./var/lib/postfix/master.lock: Cannot open: Permission denied
INFO: tar: ./var/cache/apt/archives/partial: Cannot open: Permission denied
INFO: Total bytes written: 4259594240 (4.0GiB, 7.5MiB/s)
INFO: tar: Exiting with failure status due to previous errors
ERROR: Backup of VM 100 failed - command 'set -o pipefail && lxc-usernsexec -m u:0:100000:65536 -m g:0:100000:65536 -- tar cpf - --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' --one-file-system '--warning=no-file-ignored' '--directory=/mnt/pve/Proxmox_Nas_Share/dump/vzdump-lxc-100-2026_09_19-14_06_30.tmp' ./etc/vzdump/pct.conf ./etc/vzdump/pct.fw '--directory=/mnt/pve/Proxmox_Nas_Share/dump/vzdump-lxc-100-2026_09_19-14_06_30.tmp' --no-anchored '--exclude=lost+found' --anchored '--exclude=./tmp/?*' '--exclude=./var/tmp/?*' '--exclude=./var/run/?*.pid' . | zstd '--threads=1' >/mnt/pve/Proxmox_Nas_Share/dump/vzdump-lxc-100-2026_09_19-14_06_30.tar.dat' failed: exit code 2
INFO: Failed at 2026-09-19 14:45:34
INFO: Backup job finished with errors
INFO: notified via target `mail-to-root`
TASK ERROR: job errorsI assume I have the share permissions set up OK because one CT backup succeeds?
I assume this won't stop it working but would speed it up and allow snapshots? Not sure how that would work in practice.
The main issue, as I understand it is all the Permission denied INFO reports near the end? Are they referring to ./var/*** in the tar file on the NAS? If so what permissions am I missing?
Any help appreciated.