1.进入容器

docker exec -it xxxx bash

2.使用root账号登录mysql

mysql -u root -p

3.查看当前加密方式

use mysql;
SELECT Host, User, plugin from user;

我这是改过了，应该都是caching_sha2_password 

4. 修改加密方式

ALTER USER 'root'@'%' IDENTIFIED WITH mysql_native_password BY 'root';
ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'root';

5.刷新权限

 

6.查看是否修改成功

SELECT Host, User, plugin from user;