尝试使用Connector/Python时，我收到错误“拒绝用户' root'@'localhost '访问”

Question

我正在尝试使用python连接到我的本地mysql系统。

我注意到我只能通过sudo /usr/bin/mysql -u root -p从控制台登录到我的mysql系统

我浏览了网络，对所有的建议感到非常困惑，没有一个对我有用。

就像我试过的

mysql> SELECT User, Host, plugin FROM mysql.user;

这给了我...

+------------------+-----------+-----------------------+
| User             | Host      | plugin                |
+------------------+-----------+-----------------------+
| root             | localhost | mysql_native_password |
| mysql.session    | localhost | mysql_native_password |
| mysql.sys        | localhost | mysql_native_password |
| debian-sys-maint | localhost | mysql_native_password |
| keith            | localhost | mysql_native_password |
+------------------+-----------+-----------------------+

5 rows in set (0.12 sec)

…

…

import mysql.connector

cnx = mysql.connector.connect(user='root', password='#########',
                          host='127.0.0.1',
                          database='SurveyData')
cnx.close()

…

我收到以下错误

…

MySQLInterfaceError                       Traceback (most recent call last)
~/miniconda3/lib/python3.7/site-packages/mysql/connector  /connection_cext.py in _open_connection(self)
    199         try:
--> 200             self._cmysql.connect(**cnx_kwargs)
    201         except MySQLInterfaceError as exc:

MySQLInterfaceError: Access denied for user 'root'@'localhost'

During handling of the above exception, another exception occurred:

Answer 1

看来你用root@localhost然后连接。你试过root@127.0.0.1吗？

另请检查：用户“root”@“localhost”的访问被拒绝（使用密码：是）-没有权限？

通过命令行向用户帐户授予全局权限。打开终端并运行以下命令。

:~$ mysql -u root -p
Enter password: 
mysql> GRANT SELECT ON *.* TO 'root'@'localhost' WITH GRANT OPTION;
Query OK, 0 rows affected (0.00 sec)

授予用户帐户特殊的模式权限。在命令下打开终端运行。

:~$ mysql -u root -p
Enter password: 
mysql> GRANT SELECT,UPDATE,INSERT,DELETE ON SurveyData.* TO 'root'@'localhost';
Query OK, 0 rows affected (0.00 sec)
mysql> GRANT ALL PRIVILEGES ON SurveyData.* TO 'root'@'localhost';
Query OK, 0 rows affected (0.00 sec)

我使用这个脚本进行测试:

try:
    connection = mysql.connector.connect(host='localhost',
                                         database='SurveyData',
                                         user='root',
                                         password='########')

    if connection.is_connected():
        db_Info = connection.get_server_info()
        print("Connected to MySQL Server version ", db_Info)
        cursor = connection.cursor()
        cursor.execute("select database();")
        record = cursor.fetchone()
        print("Your connected to database: ", record)

except Error as e:
    print("Error while connecting to MySQL", e)
finally:
    if (connection.is_connected()):
        cursor.close()
        connection.close()
        print("MySQL connection is closed")

Answer 2

使用根用户登录可以被认为是一种“潜在风险”,这解释了为什么通过该用户的任何连接都会被阻止。因此，解决方案是创建一个新用户，并授予他们所有权限。

mysql> CREATE USER 'newuser'@'localhost' IDENTIFIED BY 'newpassword';    
mysql> GRANT ALL PRIVILEGES ON *.* TO 'newuser'@'localhost';