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How to configure PHP Native session with redis managed database

Posted on April 14, 2021

DigitalOcean Managed Redis

PHP

By matChronotruck

I’m using PHP 7.2 and I’m unable to connect a Redis managed db instance.

in /etc/php/7.2/fpm/php.ini

session.save_handler = redis
; tried either :
session.save_path = "rediss://default:mypassword@db-redis-ams3-preprod-do-user-xxx-0.a.db.ondigitalocean.com:25061"
session.save_path = "tcp://default:mypassword@db-redis-ams3-preprod-do-user-xxx-0.a.db.ondigitalocean.com:25061"
session.save_path = "tls://default:mypassword@db-redis-ams3-preprod-do-user-xxx-0.a.db.ondigitalocean.com:25061"
session.save_path = "tls://db-redis-ams3-preprod-do-user-xxx-0.a.db.ondigitalocean.com:25061?auth=mypassword"

Each time same kind of issue :

RedisException
read error on connection

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Bobby

April 15, 2021

Hi there,

I believe that the last line with TLS and auth defined looks correct.

I’ve just created a new Redis cluster and tested this with one of my servers where I have PHP 7.4 installed.

First I updated the PHP sessions handler:

; Old value:
;session.save_handler = files
; New value:
session.save_handler = redis

Then defined the save path:

session.save_path = "tls://redis_cluster_name.b.db.ondigitalocean.com:25061?auth=password"

After that, I restarted PHP-FPM or your Apache webserver.

Another thing that you need to keep in mind is that you need to open port 25061 for outgoing TCP connections in case that you have a firewall.

If this still does not work I could suggest trying with PHP 7.4 instead of PHP 7.2 and also make sure that you have the php-redis module installed.

For more information you could follow this tutorial here:

https://www.digitalocean.com/community/tutorials/how-to-set-up-a-redis-server-as-a-session-handler-for-php-on-ubuntu-16-04

Regards, Bobby

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