laravel实现数据库读写分离配置或者多读写分离配置

config\database.php里

读写分离：
'mysql' => array(
    'read' => array(
        'host' => '192.168.1.1',
    ),
    'write' => array(
        'host' => '196.168.1.2'
    ),
    'driver'    => 'mysql',
    'database'  => 'database',
    'username'  => 'root',
    'password'  => '',
    'charset'   => 'utf8',
    'collation' => 'utf8_unicode_ci',
    'prefix'    => '',
),

多读写分离：

'mysql' => array(
    'read' => array(
        'host' => '192.168.1.1',

　　　　 'host' => '192.168.1.3',

    ),
    'write' => array(
        'host' => '196.168.1.2',

 'host' => '192.168.1.4',

    ),
    'driver'    => 'mysql',
    'database'  => 'database',
    'username'  => 'root',
    'password'  => '',
    'charset'   => 'utf8',
    'collation' => 'utf8_unicode_ci',
    'prefix'    => '',
),