错误信息

		
[root@nacos-74fb777857-qsvlx nacos]# mysql -h mysql-0.mysql.default.svc.cluster.local -unacos -pnacos
ERROR 2059 (HY000): Authentication plugin 'caching_sha2_password' cannot be loaded: /usr/lib64/mysql/plugin/caching_sha2_password.so: cannot open shared object file: No such file or directory		
		
		

原因分析，MySQL 服务器是 8.0，MySQL 客户端是 5.7 导致客户端链接服务器出错。

		
MySQL [(none)]> select version();
+-----------+
| version() |
+-----------+
| 8.0.27    |
+-----------+
1 row in set (0.00 sec)		
		
		

解决方法，用户密码使用旧的 mysql_native_password

		
neo@Netkiller-iMac ~/workspace [1]> kubectl exec -it mysql-0 -- bash
root@mysql-0:/# mysql -uroot -p123456
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 35
Server version: 8.0.27 MySQL Community Server - GPL

Copyright (c) 2000, 2021, Oracle and/or its affiliates.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> ALTER USER 'nacos'@'%' IDENTIFIED WITH mysql_native_password BY 'nacos';
Query OK, 0 rows affected (0.21 sec)

mysql> ALTER USER 'nacos'@'%' IDENTIFIED BY 'nacos';
Query OK, 0 rows affected (0.16 sec)

mysql> flush privileges;
Query OK, 0 rows affected (0.07 sec)
		
		

解决方案二

		
vim my.cnf
[mysqld]
default_authentication_plugin=mysql_native_password