Laravel DB Read/Write config

gistfile1.php

<?php

return array(
    'connections' => array(
        // Postgres
        'pgsql' => array(
            'driver'   => 'pgsql',
            'read' => array(
              'host' => 'xxxxx-replica.amazonaws.com'
            ),
            'write' => array(
              'host' => 'xxxxx-master.amazonaws.com'
            ),
            'database' => 'xxxxxxx',
            'username' => 'xxxxxxx',
            'password' => 'xxxxxxx',
            'charset'  => 'utf8',
            'prefix'   => '',
            'schema'   => 'public',
        )
    ),

    // Redis
    'redis' => array(
        'cluster' => false,
        'default' => array(
            'host'     => 'xxxxxx-redis.amazonaws.com',
            'port'     => 6379,
            'database' => 0,
        )
    )
);