使用MongoDb Extension for Yii 2连接mongodb分布式服务

return [
//....
'components' => [
'mongodb' => [
'class' => '\yii\mongodb\Connection',
'dsn' => 'mongodb://username:password@mongos1_domain:27017,mongos2_domain:27017,mongos3_domain:27017/mydatabase',
],
],
];