背景
用docker构建mysql容器后连接遇到以下问题
问题
Authentication plugin 'caching_sha2_password' cannot be loaded: dlopen(/usr/local/mysql/lib/plugin/caching_sha2_password.so, 2): image not found
mysqli_real_connect(): The server requested authentication method unknown to the client [caching_sha2_password]
mysqli_real_connect(): (HY000/2054): The server requested authentication method unknown to the client
解决方法1(docker)
适用场景
- 第一次构建容器/安装
- 已安装完成后新增用户
配置
配置 mysql.cnf 配置默认身份验证插件
[mysqld]
default_authentication_plugin = mysql_native_password
验证是否生效
使用CLI进入MySQL
$ mysql -u root -p
mysql> use mysql;
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A
Database changed
mysql> SELECT Host, User, plugin from user;
+-----------+------------------+-----------------------+
| Host | User | plugin |
+-----------+------------------+-----------------------+
| % | root | mysql_native_password |
| localhost | mysql.infoschema | caching_sha2_password |
| localhost | mysql.session | caching_sha2_password |
| localhost | mysql.sys | caching_sha2_password |
| localhost | root | mysql_native_password |
+-----------+------------------+-----------------------+
5 rows in set (0.00 sec)
root用户的身份验证器插件已经变为：mysql_native_password
解决方法2
适用场景
- MySQL 已成功安装完成后
查看身份验证类型
mysql> use mysql;
Database changed
mysql> SELECT Host, User, plugin from user;
+-----------+------------------+-----------------------+
| Host | User | plugin |
+-----------+------------------+-----------------------+
| % | root | caching_sha2_password |
| localhost | mysql.infoschema | caching_sha2_password |
| localhost | mysql.session | caching_sha2_password |
| localhost | mysql.sys | caching_sha2_password |
| localhost | root | caching_sha2_password |
+-----------+------------------+-----------------------+
5 rows in set (0.00 sec)
root 用户的验证器插件为 caching_sha2_password
修改身份验证类型(修改密码)
mysql> ALTER USER 'root'@'%' IDENTIFIED WITH mysql_native_password BY '123456';
Query OK, 0 rows affected (0.00 sec)
mysql> ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY '123456';
Query OK, 0 rows affected (0.01 sec)
使生效
mysql> FLUSH PRIVILEGES;
验证是否生效
mysql> SELECT Host, User, plugin from user;
+-----------+------------------+-----------------------+
| Host | User | plugin |
+-----------+------------------+-----------------------+
| % | root | mysql_native_password |
| localhost | mysql.infoschema | caching_sha2_password |
| localhost | mysql.session | caching_sha2_password |
| localhost | mysql.sys | caching_sha2_password |
| localhost | root | mysql_native_password |
+-----------+------------------+-----------------------+
5 rows in set (0.00 sec)