You can install Laravel-PSRedis easily with composer.

    composer require paunin/laravel-ps-redis

Next, just fill in your sentinel/redis server info in the app/config/database.php config files that already exist in your application.

You may already have some default laravel config values in place in your database config file that looks like this.

/*
    |--------------------------------------------------------------------------
    | Redis Databases
    |--------------------------------------------------------------------------
    |
    | Redis is an open source, fast, and advanced key-value store that also
    | provides a richer set of commands than a typical key-value systems
    | such as APC or Memcached. Laravel makes it easy to dig right in.
    |
    */
    'redis' => [
        'cluster' => false,
        'default' => [
            'host'     => '127.0.0.1',
            'port'     => 6379,
            'database' => 0,
        ],
    ],

Remove it and create separate configuration file for redis config/redis.php

<?php
# config/redis.php
return [
    'nodeSetName'      => env('SENTINEL_NODE_SET_NAME', 'mymaster'),
    'cluster'          => false,
    // Sentinel nodes
    'masters'          => sentinels(env('SENTINELS', '')),
    'password'         => env('REDIS_PASSWORD', null),
    'port'             => env('REDIS_PORT', 26379),
    'database'         => env('REDIS_DATABASE', 0),

    /** how long to wait and try again if we fail to connect to master */
    'backoff-strategy' => [
        'max-attempts' => env('SENTINEL_MAX_ATTEMPTS', 10),
        // the maximum-number of attempt possible to find master
        'wait-time'    => env('SENTINEL_WAIT_TIME', 500),
        // miliseconds to wait for the next attempt
        'increment'    => env('SENTINEL_INCREMENT', 1.5),
        // multiplier used to increment the back off time on each try
    ],
];

Finally, you just need to add the service provider to the providers array in app.php and comment or remove the redis service provider.

$app->register(LaravelPSRedis\LaravelPSRedisServiceProvider::class);