Issue with backup container

[slavon]

hello all. I use Virtual Environment 8.3.4

Have container from "debian-12-turnkey-postgresql_18.1-1_amd64.tar.gz"

I use additional mount point for "/var/lib/postgresql"

arch: amd64
cores: 16
features: nesting=1
hostname: postgresCT
memory: 16000
mp0: proxmoxcontainer:113/vm-113-disk-1.raw,mp=/var/lib/postgresql,backup=1,size=50G
nameserver: 192.168.200.8
net0: name=eth0,bridge=vmbr4001,firewall=1,gw=192.168.200.254,hwaddr=BC:24:11:E3:FD:98,ip=192.168.200.245/24,type=veth
ostype: debian
rootfs: proxmoxcontainer:113/vm-113-disk-0.raw,size=8G
swap: 512
unprivileged: 1

ProxMox can't backup it. Backup mode is Snapshot. Issue only for containers.

In log:

INFO: creating vzdump archive '/mnt/pve/proxmoxbackup/dump/vzdump-lxc-113-2025_03_30-02_02_07.tar.zst'
INFO: tar: ./etc/postgresql/15/main/pg_hba.conf: Cannot open: Permission denied
INFO: tar: ./etc/postgresql/15/main/pg_ident.conf: Cannot open: Permission denied
INFO: tar: ./var/backups/postgresql: Cannot open: Permission denied
INFO: tar: ./var/cache/apt/archives/partial: Cannot open: Permission denied
INFO: tar: ./var/cache/lighttpd: 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/lib/postgresql/15/main: Cannot open: Permission denied
INFO: tar: ./var/log/lighttpd: Cannot open: Permission denied
INFO: tar: ./var/log/postgresql/postgresql-15-main.log: Cannot open: Permission denied
INFO: tar: ./var/log/postgresql/postgresql-15-main.log.1: Cannot open: Permission denied
INFO: tar: ./var/log/postgresql/postgresql-15-main.log.2.gz: Cannot open: Permission denied
INFO: tar: ./var/log/postgresql/postgresql-15-main.log.3.gz: Cannot open: Permission denied
INFO: tar: ./var/spool/postfix/active: Cannot open: Permission denied
INFO: tar: ./var/spool/postfix/bounce: Cannot open: Permission denied
INFO: tar: ./var/spool/postfix/corrupt: Cannot open: Permission denied
INFO: tar: ./var/spool/postfix/defer: Cannot open: Permission denied
INFO: tar: ./var/spool/postfix/deferred: Cannot open: Permission denied
INFO: tar: ./var/spool/postfix/dev/random: Cannot open: Permission denied
INFO: tar: ./var/spool/postfix/dev/urandom: Cannot open: Permission denied
INFO: tar: ./var/spool/postfix/flush: Cannot open: Permission denied
INFO: tar: ./var/spool/postfix/hold: Cannot open: Permission denied
INFO: tar: ./var/spool/postfix/incoming: Cannot open: Permission denied
INFO: tar: ./var/spool/postfix/maildrop: Cannot open: Permission denied
INFO: tar: ./var/spool/postfix/private: Cannot open: Permission denied
INFO: tar: ./var/spool/postfix/public: Cannot open: Permission denied
INFO: tar: ./var/spool/postfix/saved: Cannot open: Permission denied
INFO: tar: ./var/spool/postfix/trace: Cannot open: Permission denied
INFO: tar: ./var/spool/tklbam-squid: Cannot open: Permission denied
INFO: Total bytes written: 1167513600 (1.1GiB, 48MiB/s)
INFO: tar: Exiting with failure status due to previous errors

Anybody known how to fix this?

 

[freeDom-]

You do not have access rights. Which user is performing the backup? What is the output of:

ls -la

for the mount directory a) on the host and b) on the guest?

Also see here: https://pve.proxmox.com/wiki/Unprivileged_LXC_containers