redis 配置出错 [ 2.0 版本 ]

'redis' => [
    'class' => 'yii\redis\Connection',
    'password'=>'3333333B',
    'hostname' => '@@@@@@.fdfd........com',//阿里云的
    'port' => 6379,
    'database' => 0,
],

报错：Database Exception – yii\db\Exception

Failed to open redis DB connection (c176ec773e6f4f65.m.cnqda.kvstore.aliyuncs.com:6379, database=0): 111 - Connection refused
Error Info: Connection refused