LXC failing to backup to Syno NFS share

[trenetics]

Hi all,

Wanted to change from CIFS to NFS, but now backups fail:

INFO: starting new backup job: vzdump 100 --storage LXC_Backups --compress zstd --mode snapshot --remove 0 --node 0v3rw4tch
INFO: Starting Backup of VM 100 (lxc)
INFO: Backup started at 2021-02-17 18:23:42
INFO: status = running
INFO: CT Name: Pi
INFO: including mount point rootfs ('/') in backup
INFO: backup mode: snapshot
INFO: ionice priority: 7
INFO: create storage snapshot 'vzdump'
  Logical volume "snap_vm-100-disk-0_vzdump" created.
INFO: creating vzdump archive '/mnt/pve/LXC_Backups/dump/vzdump-lxc-100-2021_02_17-18_23_42.tar.zst'
INFO: tar: /mnt/pve/LXC_Backups/dump/vzdump-lxc-100-2021_02_17-18_23_42.tmp: Cannot open: Permission denied
INFO: tar: Error is not recoverable: exiting now
INFO: cleanup temporary 'vzdump' snapshot
  Logical volume "snap_vm-100-disk-0_vzdump" successfully removed
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/LXC_Backups/dump/vzdump-lxc-100-2021_02_17-18_23_42.tmp' ./etc/vzdump/pct.conf ./etc/vzdump/pct.fw '--directory=/mnt/vzsnap0' --no-anchored '--exclude=lost+found' --anchored '--exclude=./tmp/?*' '--exclude=./var/tmp/?*' '--exclude=./var/run/?*.pid' ./ | zstd --rsyncable '--threads=1' >/mnt/pve/LXC_Backups/dump/vzdump-lxc-100-2021_02_17-18_23_42.tar.dat' failed: exit code 2
INFO: Failed at 2021-02-17 18:23:43
INFO: Backup job finished with errors
TASK ERROR: job errors

Funny thing is that out of 10 LXC's - 9 fail & one works:

()
INFO: starting new backup job: vzdump 102 --mode snapshot --remove 0 --node 0v3rw4tch --storage LXC_Backups --compress zstd
INFO: Starting Backup of VM 102 (lxc)
INFO: Backup started at 2021-02-17 19:03:55
INFO: status = running
INFO: CT Name: SentineL
INFO: including mount point rootfs ('/') in backup
INFO: backup mode: snapshot
INFO: ionice priority: 7
INFO: create storage snapshot 'vzdump'
  Logical volume "snap_vm-102-disk-0_vzdump" created.
INFO: creating vzdump archive '/mnt/pve/LXC_Backups/dump/vzdump-lxc-102-2021_02_17-19_03_55.tar.zst'
INFO: Total bytes written: 4968529920 (4.7GiB, 117MiB/s)
INFO: archive file size: 927MB
INFO: cleanup temporary 'vzdump' snapshot
  Logical volume "snap_vm-102-disk-0_vzdump" successfully removed
INFO: Finished Backup of VM 102 (00:00:43)
INFO: Backup finished at 2021-02-17 19:04:38
INFO: Backup job finished successfully
TASK OK

The config for my LXC's are all the same:

()
arch: amd64
cores: 4
hostname: SentineL
memory: 512
net0: name=eth0,bridge=vmbr0,gw=192.168.1.1,hwaddr=F6:CA:9F:AE:09:40,ip=192.168.1.27/24,type=veth
onboot: 1
ostype: ubuntu
rootfs: VMdata:vm-102-disk-0,size=8G
swap: 256

Any ideas on what the heck is going on???

 

[trenetics]

*Update*

Appears to have been an rights issue on the Syno, i SSH'd into it and gave the backup folder rights as folllows:

/bin/chmod 1777 /mydir

Now everything is working again!