Alain Raap

Natassia, I've described how to do this for Linux (Redhat) here: https://tracker.moodle.org/browse/MDL-70363
You have to compile php-pecl sodium and add it to your php modules.

Hi Rick,

There was a discussion about Sodium and the fact that it is required as a php extension. This tracker explains some more and we had a challenge to get it working on Redhat: https://tracker.moodle.org/browse/MDL-70363
Sodium will be a required extension in a future LTS version of Moodle. It is possible then to encrypt your Moodle data, there is a new tool in admin cli to generate a sodium key as I described in the tracker MDL-70363.

To connect Redis with Moodle you have to add the Redis config settings in your config.php. Check config-dist.php for the exact settings.
Also your save_handler in php.ini and in www.conf (if you use php-fpm) should be changed to point to redis (tcp://[ip redis server]:[port number Redis]_

Hi Anderson,

You say that Redis is not working, did you check the phpinfo page in Moodle if the Redis extension was loaded?
You should see a redis section that is enabled, if not, you'll first have to install / activate the php redis extension on your server.