MySQL5.7--------proxy实现rols管理

1. 背景

* 角色的概念管理数据库访问权限。 根据角色自身的设置不同，一个角色可以看做是一个数据库用户，或者一组数据库用户。 角色可以拥有数据库对象（比如，表）以及可以把这些对象上的权限赋予其它角色， 以控制谁拥有访问哪些对象的权限。另外，我们也可以把一个角色的成员 （membership）权限赋予其它角色，这样就允许成员角色使用它被赋予成员权限的角色之权限。

* MySQL 5.7开始利用 'proxy' 代理实现类似 'rols' 角色管理功能。

2. 环境

* MySQL Server

Server version: 5.7.18 MySQL Community Server (GPL)Copyright (c) 2000, 2017, Oracle and/or its affiliates. All rights reserved.Oracle is a registered trademark of Oracle Corporation and/or itsaffiliates. Other names may be trademarks of their respectiveowners.Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.mysql> select version();+-----------+| version() |+-----------+| 5.7.18    |+-----------+1 row in set (0.00 sec)

3. 实现

* 启用代理用户映射

mysql> SET @@global.check_proxy_users = ON;Query OK, 0 rows affected (0.00 sec)mysql> SET @@global.mysql_native_password_proxy_users = ON;Query OK, 0 rows affected (0.00 sec)

* 创建角色(rols) 用户

mysql> create user 'rols_it'@'127.0.0.1';Query OK, 0 rows affected (0.01 sec)

* 创建普通用户tom

mysql> create user 'tom'@'127.0.0.1' identified by '123456';Query OK, 0 rows affected (0.00 sec)

* 通过proxy方式添加tom用户到角色

mysql> grant proxy on 'rols_it'@'127.0.0.1' to 'tom'@'127.0.0.1';Query OK, 0 rows affected (0.00 sec)

4. 测试

* 创建测试数据库　it

mysql> create database it;Query OK, 1 row affected (0.00 sec)

* 给角色 (rols) 添加数据库 it 的查看权限

mysql> grant select ON it.* TO 'rols_it'@'127.0.0.1';Query OK, 0 rows affected (0.00 sec)

* 查看角色权限

mysql> show grants for 'rols_it'@'127.0.0.1';+-------------------------------------------------+| Grants for rols_it@127.0.0.1                    |+-------------------------------------------------+| GRANT USAGE ON *.* TO 'rols_it'@'127.0.0.1'     || GRANT SELECT ON `it`.* TO 'rols_it'@'127.0.0.1' |+-------------------------------------------------+2 rows in set (0.01 sec)

* 查看tom用户权限

mysql> show grants for 'tom'@'127.0.0.1';+-----------------------------------------------------------+| Grants for tom@127.0.0.1                                  |+-----------------------------------------------------------+| GRANT USAGE ON *.* TO 'tom'@'127.0.0.1'                   || GRANT PROXY ON 'rols_it'@'127.0.0.1' TO 'tom'@'127.0.0.1' |+-----------------------------------------------------------+2 rows in set (0.00 sec)

* 通过tom用户登陆连接MySQL

[root@MySQL mysql_data]# mysql -utom -p123456 -h227.0.0.1mysql: [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 14Server version: 5.7.18-log MySQL Community Server (GPL)Copyright (c) 2000, 2017, Oracle and/or its affiliates. All rights reserved.Oracle is a registered trademark of Oracle Corporation and/or itsaffiliates. Other names may be trademarks of their respectiveowners.Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.mysql> show databases;+--------------------+| Database           |+--------------------+| information_schema || it                 |+--------------------+2 rows in set (0.00 sec)

5. 总结

以需求驱动技术，技术本身没有优略之分，只有业务之分。