Allow using '/' as external storage mountpoint

[icewind1991]

Allow the admin to configure the mounpoint of an external storage as '/', making it that the user only sees the external storage.

Note that this is different than using a primary storage, since anything outside /$user/files, such as thumbnails, will still be stored locally

[mention-bot]

@icewind1991, thanks for your PR! By analyzing the history of the files in this pull request, we identified @Xenopathic, @butonic and @jvillafanez to be potential reviewers.

[MariusBluem]

THIS IS 😍😍😍😍

[LukasReschke]

I'm not entirely a fan of that as this can be a kinda destructive action until we have a dedicated "Save" button on this. Otherwise an admin may by accident enter / here (while wanting to enter more) and then the stuff is auto-saved because he clicks outside of the field and then I expect a kinda big syncing mess :-)

[MariusBluem]

Good point ;) @LukasReschke ... Also, what happes to the files which were previously stored in /?

[MariusBluem]

I have some more questions 😅:

• How does this affect the quota?
• How / Is it possible to mount storages in subfolders, if you have mounted a storage into /

[MorrisJobke]

Tested and works 👍

[MorrisJobke]

How does this affect the quota?

Quota is not applied to external storage

Also, what happes to the files which were previously stored in /?

They are not available anymore. The same way as on linux mount points.

How / Is it possible to mount storages in subfolders, if you have mounted a storage into /

Yes works.

[LukasReschke]

My remarks from above stay. Please add a "Save" button as I see this otherwise just as exploding as the LDAP wizard in the past…

[icewind1991]

@LukasReschke save button is now in place

Fixed

[rullzer]

Lets do this!

[TWART016]

Correction:
With a subfolder defined I can't select subfolders for offline sync just the whole folder.

[xtrasimplicity]

Is there any way to use this without everyone seeing absolutely every file on the share? I tried this in the Docker release of v14 and found that every user could see exactly the same files (and had full control over them).
I've tried mounting to /$user, but that just created a "folder" in each user's home directory (on NextCloud, not the SMB share) called $user.

[mzamot]

This is happening actually. If you use for example swift as external storage and mount it as /, every user will be able to see every user file

[MorrisJobke]

This is happening actually. If you use for example swift as external storage and mount it as /, every user will be able to see every user file

That's the whole point of mounting it to / for all users - all users see the same content.

[mzamot]

This is happening actually. If you use for example swift as external storage and mount it as /, every user will be able to see every user file

That's the whole point of mounting it to / for all users - all users see the same content.

I see. So there is no way to use the external storage (like swift or s3), but keep every user still isolated from each other?

[MorrisJobke]

I see. So there is no way to use the external storage (like swift or s3), but keep every user still isolated from each other?

There are multiple ways: for SMB for example you can place $user into the path to mount different directories based on the username. For object storage just use the primary storage option: https://github.com/nextcloud/server/blob/master/config/config.sample.php#L1243-L1320

The latter is most likely what you are looking for 😉