Moodle 5.2 Redis® Setup: Sessions + MUC Caching

Move Moodle 5.2 login sessions and Moodle Universal Cache (MUC) to a private local Redis® service—then verify that the data survives a graceful restart and that purging MUC does not log out an active user. 📘 COMPLETE COMPANION GUIDE https://gist.github.com/OpenEduOpsLab... In this production-aware tutorial, you will: Configure Redis separately for Moodle browser sessions and MUC caches. Keep port 6379 on loopback and prove that Redis is not publicly reachable. Verify namespace separation, graceful-restart persistence, safe cache purging, and rollback readiness. The guide contains the commands, prerequisites, configuration values, verification checks, troubleshooting paths, production considerations, and rollback procedures used in this tutorial. ⏱️ CHAPTERS 00:00 Move Moodle sessions and cache to Redis 00:38 Introduction and safety boundary 01:47 Step 0 — Confirm and protect the starting point 03:56 Step 1 — Install Redis and its PHP extension 05:35 Step 2 — Prove Redis is private 07:49 Step 3 — Move user sessions to Redis 11:12 Step 4 — Move Moodle caches to Redis 15:57 Step 5 — Test restart persistence 17:37 Step 6 — Purge caches without losing the login 19:49 Final proof 21:00 Closing recap 🧪 TESTED ENVIRONMENT Ubuntu Server 24.04 LTS Moodle 5.2.1 Apache 2.4 with PHP 8.3 redis-server and php-redis from the Ubuntu repositories Redis bound to the local loopback interface on port 6379 Single-VPS public demonstration environment ⚠️ PRODUCTION NOTE This tutorial demonstrates a single-server design in which Moodle, Apache, and Redis share one VPS. It does not provide Redis replication, failover, or high availability, and it does not claim a measured performance gain. Changing Moodle's session backend also invalidates existing file-backed sessions, so use a maintenance window, notify users, and verify a current recovery point before making the change on a live site. 📚 OFFICIAL DOCUMENTATION Moodle 5.2 — Redis cache store: https://docs.moodle.org/502/en/Redis_... Moodle 5.2 — Session handling: https://docs.moodle.org/502/en/Sessio... Moodle 5.2 — Caching: https://docs.moodle.org/502/en/Caching Moodle config-dist.php session examples: https://github.com/moodle/moodle/blob... Redis security: https://redis.io/docs/latest/operate/... Redis persistence: https://redis.io/docs/latest/operate/... OpenEduOps provides independent educational content and is not affiliated with, endorsed by, sponsored by, supported by, or certified by Moodle Pty Ltd or Redis Ltd. Moodle and the associated Moodle logos are trademarks or registered trademarks of Moodle Pty Ltd or its related affiliates. Redis is a registered trademark of Redis Ltd. Any rights therein are reserved to Redis Ltd. Disclosure: This video is not sponsored and contains no affiliate links. OpenEduOps — Build it. Secure it. Understand it. #Moodle #Redis #OpenEduOps