1. 背景

* 角色的概念管理數據庫訪問權限。 根據角色自身的設置不同，一個角色可以看做是一個數據庫用戶，或者一組數據庫用戶。 角色可以擁有數據庫對象（比如，表）以及可以把這些對象上的權限賦予其它角色， 以控制誰擁有訪問哪些對象的權限。另外，我們也可以把一個角色的成員 （membership）權限賦予其它角色，這樣就允許成員角色使用它被賦予成員權限的角色之權限。

* MySQL 5.7開始利用 ‘proxy‘ 代理實現類似 ‘rols‘ 角色管理功能。

2. 環境

* 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 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> select version();
+-----------+
| version() |
+-----------+
| 5.7.18    |
+-----------+
1 row in set (0.00 sec)

3. 實現

* 啟用代理用戶映射

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)

* 創建角色(rols) 用戶

mysql> create user [email protected];
Query OK, 0 rows affected (0.01 sec)

* 創建普通用戶tom

mysql> create user [email protected] identified by ‘123456‘;
Query OK, 0 rows affected (0.00 sec)

* 通過proxy方式添加tom用戶到角色

mysql> grant proxy on [email protected] to [email protected];
Query OK, 0 rows affected (0.00 sec)

4. 測試

* 創建測試數據庫　it

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

* 給角色 (rols) 添加數據庫 it 的查看權限

mysql> grant select ON it.* TO [email protected];
Query OK, 0 rows affected (0.00 sec)

* 查看角色權限

mysql> show grants for [email protected];
+-------------------------------------------------+
| Grants for [email protected]                    |
+-------------------------------------------------+
| GRANT USAGE ON *.* TO [email protected]     |
| GRANT SELECT ON `it`.* TO [email protected] |
+-------------------------------------------------+
2 rows in set (0.01 sec)

* 查看tom用戶權限

mysql> show grants for [email protected];
+-----------------------------------------------------------+
| Grants for [email protected]                                  |
+-----------------------------------------------------------+
| GRANT USAGE ON *.* TO [email protected]                   |
| GRANT PROXY ON [email protected] TO [email protected] |
+-----------------------------------------------------------+
2 rows in set (0.00 sec)

* 通過tom用戶登陸連接MySQL

[[email protected] mysql_data]# mysql -utom -p123456 -h127.0.0.1
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 14
Server 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 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> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| it                 |
+--------------------+
2 rows in set (0.00 sec)

5. 總結

以需求驅動技術，技術本身沒有優略之分，只有業務之分。

本文出自 “sea” 博客，請務必保留此出處http://lisea.blog.51cto.com/5491873/1941678

MySQL5.7--------proxy實現rols管理