Momoko Ping设置

Question

我是Tornado和Momoko的新手(我之前使用的是查询)，当我运行这个方法时，我一直收到这个错误：

psycopg2.OperationalError: could not translate host name \"pg\" to address: No address associated with hostname

我知道主机可以工作，因为我已经成功地与查询建立了连接。

以下是我如何设置它(这是一个简单的检查函数，以确保连接仍然有效)：

def __init__(self, event, frequency, params):
    super().__init__(event, frequency, params)
    # uri of PGDB
    self.dsn ='dbname=%s user=%s password=%s host=%s port=%s' % (configuration["postgre"][0]["dbName"],
                                                                 configuration["postgre"][0]["userName"],
                                                                 configuration["postgre"][0]["password"],
                                                                 configuration["postgre"][0]["host"],
                                                                 configuration["postgre"][0]["port"])
    logging.info(self.dsn)
    # creates actual link to DB
    self.Pg_Loop = IOLoop

    self.host = configuration["postgre"][0]["host"]

@gen.coroutine
def check(self):
    try:
        loop = self.Pg_Loop
        pool = momoko.Connection(dsn=self.dsn, ioloop=loop)
        future = yield pool.connect()
        yield future.result()
        data = {'host': self.host, 'status': events.STATUS_OK}
    except (PartiallyConnectedError, PoolError, InternalError, DatabaseError, OperationalError):
        data = {'host': self.host, 'status': events.STATUS_FAIL, 'error': traceback.format_exc()}
    self.save(data)`