mysql - 即使 mysqld 在端口 3306 上运行，也无法连接到 'localhost:3306' 上的 MySQL 服务器

Question

尝试使用 mysql-connector 通过 python 连接到 mysql，但出现此错误:

 Traceback (most recent call last):
 File "/var/www/html/cloudlab/env/lib/python3.6/site-packages/mysql/connector/network.py", line 509, in open_connection
    self.sock.connect(sockaddr)
ConnectionRefusedError: [Errno 111] Connection refused

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "./get_stf_file_names.py", line 26, in update_aws_script_details
    database="service_portal"
  File "/var/www/html/cloudlab/env/lib/python3.6/site-packages/mysql/connector/__init__.py", line 179, in connect
    return MySQLConnection(*args, **kwargs)
  File "/var/www/html/cloudlab/env/lib/python3.6/site-packages/mysql/connector/connection.py", line 95, in __init__
    self.connect(**kwargs)
  File "/var/www/html/cloudlab/env/lib/python3.6/site-packages/mysql/connector/abstracts.py", line 716, in connect
    self._open_connection()
  File "/var/www/html/cloudlab/env/lib/python3.6/site-packages/mysql/connector/connection.py", line 206, in _open_connection
    self._socket.open_connection()
  File "/var/www/html/cloudlab/env/lib/python3.6/site-packages/mysql/connector/network.py", line 512, in open_connection
    errno=2003, values=(self.get_address(), _strioerror(err)))
mysql.connector.errors.InterfaceError: 2003: Can't connect to MySQL server on 'localhost:3306' (111 Connection refused)

我检查了 3306 端口是否被 mysqld 使用，它是:

netstat -lnp | grep 3306

给出了:

tcp        0      0 my-ip:3306      0.0.0.0:*               LISTEN      12003/mysqld

我也试过这个命令，它工作得很好:

mysql -h localhost -u root -p

(因为我可以使用它连接到数据库)

我正在尝试通过以下方式访问数据库:

mydb = mysql.connector.connect(host="localhost",user="****",
    passwd="****",
    database="**********"
    )
    cursor = mydb.cursor(dictionary=True)

如果我将上述命令中的 localhost 更改为 my-ip，则它可以正常工作。我做错了什么吗？

Answer 1

本地主机是一个ip 127.0.0.1。
您的 mysql 实例是监听那个 ip 还是外部 ip？