I run OMV in a Proxmox VM. I have a USB hard drive connected to the host to use as a backup disk, but it is also my media disk. I have mounted it to a LXC container which then shares it over NFS so other VMs can access it. OMV mounts that NFS share and I use it in the many Docker services running on OMV. This works well, but the problem is that the NFS share often unmounts on OMV's side and practically disappears. The share on the LXC container is active when I try access it, but it is not mounted in OMV.
First I was mounting it in OMV using `/etc/fstab` and the fix was to just run `mount -a` whenever I noticed it unmounted or via a cron job. I then tried the official OMV-extras NFS mount extension, but the problem persists and with it even `mount -a` doesn't re-mount it.
How could I troubleshoot what is going on? Are there any relevant logs in OMV or NFS in general? Could it be some NFS timeout variable either in the sharing LXC container or the mounting OMV VM?
Many thanks