Nextcloud lost config.php data

[udevNull]

Nextcloud version: 15.0.2
Operating system and version: Ubuntu 16.04

The problem is very simple, the machine ran out of disk space and for some reason nextcloud cleared config.php. Now it’s asking me to reconfigure but I’ve got a whole bunch of documents etc, existing accounts, data configs etc already existing.

How do I configure Nextcloud to use the existing database connection with all the existing files and user accounts etc?

[udevNull]

bumping this post

[udevNull]

Hey guys, this is quite a serious issue because my calendar and contacts are also synched with this installation. Any help or pointers would be extremely well received and appreciated.

[Bernie_O]

In config.php is instanceid and passwordsalt stored: Configuration Parameters — Nextcloud latest Administration Manual latest documentation

@udevNull

How do I configure Nextcloud to use the existing database connection with all the existing files and user accounts etc?

I am sorry, but I don’t think this is possible without the passwordsalt and instanceid.

@udevNull

this is quite a serious issue because my calendar and contacts are also synched with this installation.

You could extract calendars and addressbooks with my script calcardbackup. Have a look at section „Does this work with a broken Nextcloud instance“ in the README of the script. You need your database credentials for this to work though.

[udevNull]

@Bernie_O

You could extract calendars and addressbooks with my script calcardbackup. Have a look at section „Does this work with a broken Nextcloud instance“ in the README of the script. You need your database credentials for this to work though.

Thank you very much. I will definitely have a look at that.

@Bernie_O

I am sorry, but I don’t think this is possible without the passwordsalt and instanceid.

Hmmm, is there a possible way to perhaps get nextcloud to rescan the files on the filesystem? They’re all still there. Perhaps set it up with a new DB and re-import the data again or something like that?

[ChristophWurst]

Would it be possible to restore the file from a backup?

[udevNull]

I wasn’t really “aware” as such of the data within the config.php file, which I should’ve checked regardless. So it wasn’t part of any backups I’m making.

[Bernie_O]

@udevNull

Hmmm, is there a possible way to perhaps get nextcloud to rescan the files on the filesystem?

Yes, this is possible via occ. Have a look at this:
https://docs.nextcloud.com/server/stable/admin_manual/configuration_server/occ_command.html#file-operations-label

[udevNull]

Thank you very much. I will give this a shot.

[udevNull]

I was able to restore the config.php file from a nextcloud backup that occurred when I updated the nextcloud versions. I am so grateful for nextcloud on doing this!

Thank you guys and thank you @ChristophWurst for your suggestion.

For anybody else who runs into this issue, you could have a backup of the config.php file in your Nextcloud data location.

e.g.
/var/www/nextcloud/data/updater-sdafsdsfd/backups/nextcloud-14.0.6.0/config/