Backup is unmounting my NFS mount

[PetitMote]

Hi there,

I have a NFS mount on /home/yunohost.multimedia/media_storage. This mount stores my media for Jellyfin. I don’t want it backuped, as it contains too much data.

When a backup is started, Yunohost unmounts every mounts in /home/yunohost.multimedia. I guess this is meant to avoid backuping twice what is in users’ multimedia folders. However, it mounts back most multimedia folders, but not the custom NFS mount. I have to mount it back using sudo mount -a.

I don’t know if this is an issue with the borg app or with Yunohost?

Thank you

[fflorent]

That might be because indeed, Yunohost offers to mount directories when backuping, and to unmount recursively the working directory (where the backups are copied (hard-link copied if I am not wrong)):
https://github.com/YunoHost/yunohost/blob/c5bd5bed951f60900bcca310ffc2b48d2b2f86c0/src/backup.py#L2549-L2572

And we take advantage of it (I need to understand why):

borg_ynh/conf/backup_method

Lines 17 to 19 in 4285df0

	do_need_mount() {
	true
	}

So yeah, given that, I am not surprised of what you point (though not absolutely certain either).

In order to skip the backup of a directory, do you know that you can create an empty .nobackup file at the root of the folder to skip (i.e. /home/yunohost.multimedia/media_storage)?
Source: https://github.com/YunoHost-Apps/borg_ynh/blob/4285df01ff8b39983b26e3c76d09c21bcaa1baff/doc/ADMIN.md#excluding-folders-from-backups

[PetitMote]

Thank you for your answer!

I already have a .nobackup file in media_storage (don’t know if it’s supposed to have any effect of the umounting of the folder).

It seems like this might be an issue with Yunohost umounting the folder, but not mounting it back?

[fflorent]

Ah right then.

don’t know if it’s supposed to have any effect of the umounting of the folder

Probably not, but maybe as a side effect? But apparently not.

It seems like this might be an issue with Yunohost umounting the folder, but net mounting it back?

Probably. I would either need help from other people or time to investigate.

[PetitMote]

I’m not I’m competent enough to help. However, I can create an issue on Yunohost, maybe we’d have some answers over there?

[fflorent]

Probably, though there at this right moment there are hotter issues they're on :)

[PetitMote]

Hi

As a workaround, I simply moved my NFS mount to /media/media_storage and made a symlink. Got the idea from Yunohost doc: https://doc.yunohost.org/en/admin/tutorials/moving_app_folder/

Would be great if this issue was fixed, however it’s clearly not urgent.