LXC Container will not backup

[Cronus89]

I get the below error message when trying to backup an lxc container. its a tiny one. I have 2 other lxc that backup fine, and 3 other KVM Vm's that backup fine. Some guidance is appreciated. The permission died error makes no sense as its writing the log files to it fine.

Task viewer: Backup

OutputStatus

Stop
INFO: starting new backup job: vzdump 105 --mode snapshot --node prox1 --compress lzo --remove 0 --storage Synology
INFO: Starting Backup of VM 105 (lxc)
INFO: status = stopped
INFO: backup mode: stop
INFO: ionice priority: 7
INFO: CT Name: ansible
INFO: creating archive '/mnt/pve/Synology/dump/vzdump-lxc-105-2018_10_10-21_09_54.tar.lzo'
INFO: tar: /mnt/pve/Synology/dump/vzdump-lxc-105-2018_10_10-21_09_54.tmp: Cannot open: Permission denied
INFO: tar: Error is not recoverable: exiting now
ERROR: Backup of VM 105 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/Synology/dump/vzdump-lxc-105-2018_10_10-21_09_54.tmp' ./etc/vzdump/pct.conf '--directory=/mnt/vzsnap0' --no-anchored '--exclude=lost+found' --anchored '--exclude=./tmp/?*' '--exclude=./var/tmp/?*' '--exclude=./var/run/?*.pid' ./ | lzop >/mnt/pve/Synology/dump/vzdump-lxc-105-2018_10_10-21_09_54.tar.dat' failed: exit code 2
INFO: Backup job finished with errors
TASK ERROR: job errors

 

[Richard]

The permission died error makes no sense as its writing the log files to it fine.

...
INFO: tar: /mnt/pve/Synology/dump/vzdump-lxc-105-2018_10_10-21_09_54.tmp: Cannot open: Permission denied

Does it main promox host writes logfiles to /mnt/pve/Synology/ ?

For better understanding post /etc/pve/storage.cfg

 

[Cronus89]

proxmox hosts does write logfiles to there.

root@prox1:~# cat /etc/pve/storage.cfg
dir: local
path /var/lib/vz
content iso,images,rootdir,backup,vztmpl

lvmthin: local-lvm
thinpool data
vgname pve
content images,rootdir

nfs: Synology
export /volume1/backups-Proxmox
path /mnt/pve/Synology
server 10.0.0.105
content backup,vztmpl,iso
maxfiles 15
options vers=3

 

[Richard]

proxmox hosts does write logfiles to there.

root@prox1:~# cat /etc/pve/storage.cfg
dir: local
path /var/lib/vz
content iso,images,rootdir,backup,vztmpl

lvmthin: local-lvm
thinpool data
vgname pve
content images,rootdir

nfs: Synology
export /volume1/backups-Proxmox
path /mnt/pve/Synology
server 10.0.0.105
content backup,vztmpl,iso
maxfiles 15
options vers=3

Does it work if you backup to local storage and move the created backup files then to /mnt/pve/Synology/dump ?