Mounting image file to shared folders

Hello,

Problem:

When I do any privilege changes in Access rights management -> Group -> privileges button, save and hit apply and yes button I get an error.

“Failed to execute command 'export PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin; export LANG=C.UTF-8; systemctl restart 'sharedfolders-LIVE_ROOT.mount' 2>&1' with exit code '1': Job for sharedfolders-LIVE_ROOT.mount failed. See "systemctl status sharedfolders-LIVE_ROOT.mount" and "journalctl -xe" for details.”

Below is part of output from journalctl -xe

-- Unit sharedfolders-LIVE_ROOT.mount has begun shutting down.
Jul 23 23:41:19 mynas systemd[1]: sharedfolders-LIVE_ROOT.mount: Mount process exited, code=exited status=32
Jul 23 23:41:19 mynas systemd[1]: Failed unmounting Mount shared folder LIVE_ROOT to /sharedfolders/LIVE_ROOT.
-- Subject: Unit sharedfolders-LIVE_ROOT.mount has finished shutting down

Below is syslog part of it:

Jul 24 00:34:11 mynas systemd[1]: Unmounting /sharedfolders/LIVE_ROOT/cctv...
Jul 24 00:34:11 mynas systemd[1]: sharedfolders-LIVE_ROOT-cctv.mount: Mount process exited, code=exited status=32
Jul 24 00:34:11 mynas systemd[1]: Failed unmounting /sharedfolders/LIVE_ROOT/cctv.
Jul 24 00:34:11 mynas systemd[1]: Unmounting Mount shared folder LIVE_ROOT to /sharedfolders/LIVE_ROOT...
Jul 24 00:34:11 mynas systemd[1]: sharedfolders-LIVE_ROOT.mount: Mount process exited, code=exited status=32
Jul 24 00:34:11 mynas systemd[1]: Failed unmounting Mount shared folder LIVE_ROOT to /sharedfolders/LIVE_ROOT.

What resolves it:

To overcome the above error I have to stop nfs-server service and unmount /sharedfolders/cctv/ which is mounted from /srv/dev-disk-by-label-Live/hikvision.img. Apply privilege changes and mount image and restart nfs server services.

Config and things I noticed:

Shared folder pointing to root.

I created shared folder LIVE_ROOT with path “/” to use it for rsnaphshot as backup source as otherwise there would be many rsnapshot jobs, as many as I have shared folders.

Because I pointed the Path to the share as “/” when I execute “df” the main mounting point for the partition changes from /srv/dev-disk-by-label-Live to /sharedfolders/LIVE_ROOT but I still can access files from /srv/dev-disk-by-label-Live

/dev/sdb13844640564 1043107984 280151619628% /sharedfolders/LIVE_ROOT
/dev/sda13844640564939583816 290504036425% /srv/dev-disk-by-label-Backup

Image mounted for Hikvision ip camera

My Hikvision ip camera only works with nfs and doesn’t work with large hard drives. I tried user quotas and other suggestions but I only found one thing to work and it was to create a fixed size disk image with dd and mount it to shared folder that I also created nfs and samba shares for.

I mount image after omv entries for Hikvision ip camera. Below is fstab file

root@mynas:~# cat /etc/fstab


LABEL=boot /boot/efi vfat defaults,sync 0 0
# >>> [openmediavault]
/dev/disk/by-label/Backup /srv/dev-disk-by-label-Backup ext4 defaults,nofail,user_xattr,noexec,usrjquota=aquota.user,grpjquota=aquota.group,jqfmt=vfsv0,acl 0 2
/dev/disk/by-label/Live /srv/dev-disk-by-label-Live ext4 defaults,nofail,user_xattr,jqfmt=vfsv0,acl 0 2
/srv/dev-disk-by-label-Live/cctv /export/cctv none bind,nofail 0 0
# <<< [openmediavault]
/srv/dev-disk-by-label-Live/hikvision.img /sharedfolders/cctv ext4 loop 0 0

Questions:

How to manage mounting points of image file to prevent any conflicts with services or omv mount and unmount jobs?

Thanks in advance