Laravel: how to separate cache and session into different redis database?

Introduction

Here is my note, for some other guy who running in to this problem, I think this is should be in the docs.

By default, redis gives you 16 separate databases, but laravel out of the box will try to use database 0 for both sessions and cache.

Our solution is to let Redis caching using database 0, and database 1 for Session, there for solving the session clear by running php artisan cache:clear problem.

Note: Tested at Laravel 5.1

1. Setting up Session Redis connection

Modify config/database.php, add session key to the redis option:

'redis' => [   'cluster' => false,   'default' => [       'host'     => env('REDIS_HOST', 'localhost'),       'password' => env('REDIS_PASSWORD', null),       'port'     => env('REDIS_PORT', 6379),       'database' => 0,   ],   'session' => [         'host'     => env('REDIS_HOST', 'localhost'),         'password' => env('REDIS_PASSWORD', null),         'port'     => env('REDIS_PORT', 6379),         'database' => 1,   ],],

2. Make use of the session connection

Modify config/session.php, change the following:

'connection' => null,

to:

'connection' => 'session',

3. Using Redis as session driver

Modify .env, change SESSION_DRIVER:

SESSION_DRIVER=redis

4. Testing out

Execute the following artisan command, then check your login state:

php artisan cache:clear

If the login state persists, voilà!

Laravel 5.5:

database.php should look like this:

'redis' => [    'client' => 'predis',    'default' => [        'host' => env('REDIS_HOST', '127.0.0.1'),        'password' => env('REDIS_PASSWORD', null),        'port' => env('REDIS_PORT', 6379),        'database' => 0,    ],    'session' => [        'host' => env('REDIS_HOST', '127.0.0.1'),        'password' => env('REDIS_PASSWORD', null),        'port' => env('REDIS_PORT', 6379),        'database' => 1,    ],],

And in the session.php you have to update also the key "connection" to the right key. In this case 'session'

'connection' => 'session',

Laravel 5 now supports this.

https://github.com/laravel/framework/commit/d10a840514d122fa638eb5baa24c8eae4818da3e

You can select redis connection by modifying config/cache.php

'stores' => [    'redis' => [        'driver' => 'redis',        'connection' => 'your-connection-name',    ],],

Laravel 4 CacheManager does not support selecting redis connection.

What you need to do is to modify/extend CacheManager and override createRedisDriver() method.

Modify this line

return $this->repository(new RedisStore($redis, $this->getPrefix()));

To

return $this->repository(    new RedisStore($redis, $this->getPrefix(),     $this->app['config']['cache.redis']));

Now you can define your configuration in cache.php

'redis' => 'your-connection-name'