学习目标
学习openGauss创建角色、修改角色属性、更改角色权限和删除角色
课程学习
角色是用来管理权限的，从数据库安全的角度考虑，可以把所有的管理和操作权限划分到不同的角色上
连接openGauss
#第一次进入等待15秒
#数据库启动中...
su - omm
gsql -r
1.创建角色
–列出所有数据库角色
\du
–创建角色manager1，密码test_123
CREATE ROLE manager1 IDENTIFIED BY 'test_123';
–创建角色manager2，密码test_456，具有LOGIN属性且为系统管理员
CREATE ROLE manager2 LOGIN SYSADMIN IDENTIFIED BY 'test_456';
–创建角色manager3，密码test_789，从2021年12月10日生效，2021年12月30日失效
CREATE ROLE manager3 WITH LOGIN PASSWORD 'test_789' VALID BEGIN '2021-12-10' VALID UNTIL '2021-12-30';
–再次查看所有数据库角色
\du+
2.修改角色属性
–修改角色manage1具有LOGIN属性且为系统管理员
ALTER ROLE manager1 SYSADMIN LOGIN;
–查看manager1
\du+ manager1
–修改角色manager2密码
ALTER ROLE manager2 IDENTIFIED BY 'abcd@123' replace 'test_456';
–重命名manager2
ALTER ROLE manager2 RENAME TO manager20;
3.授权
–将omm的权限授权给manager1
GRANT omm to manager1 with admin option;
4.回收权限
revoke all privilege from manager1;
5.删除角色
drop role manager1;
drop role manager2;
drop role manager3;
课后作业
1.创建角色role1为系统管理员, role2指定生效日期, role3具有LOGIN属性
omm=# CREATE ROLE role1 SYSADMIN IDENTIFIED BY 'test_123';
NOTICE: The encrypted password contains MD5 ciphertext, which is not secure.
CREATE ROLE
omm=# CREATE ROLE role2 IDENTIFIED BY 'test_123' VALID BEGIN '2021-12-10' VALID UNTIL '2021-12-30';
NOTICE: The encrypted password contains MD5 ciphertext, which is not secure.
CREATE ROLE
omm=# CREATE ROLE role3 LOGIN IDENTIFIED BY 'test_123';
NOTICE: The encrypted password contains MD5 ciphertext, which is not secure.
CREATE ROLE
2.重命名role1
omm=# ALTER ROLE role1 RENAME TO role10;
NOTICE: MD5 password cleared because of role rename
ALTER ROLE
3.修改role2密码
omm=# ALTER ROLE role2 IDENTIFIED BY 'abcd@123' replace 'test_123';
NOTICE: The encrypted password contains MD5 ciphertext, which is not secure.
ALTER ROLE
4.将omm权限授权给role3,再回收role3的权限
omm=# GRANT omm to role3 with admin option;
GRANT ROLE
omm=# \du
List of roles
Role name | Attributes
| Member of
-----------+-------------------------------------------------------------------------------------------------------------
-----+-----------
gaussdb | Sysadmin
| {}
manager20 | Sysadmin
| {}
omm | Sysadmin, Create role, Create DB, Replication, Administer audit, Monitoradmin, Operatoradmin, Policyadmin, U
seFT | {}
role10 | Cannot login, Sysadmin
| {}
role2 | Cannot login
+| {}
| Role valid begin 2021-12-10 00:00:00+08
+|
| Role valid until 2021-12-30 00:00:00+08
|
role3 |
| {omm}
omm=# revoke all privilege from role3;
ALTER ROLE
omm=# \du
List of roles
Role name | Attributes
| Member of
-----------+-------------------------------------------------------------------------------------------------------------
-----+-----------
gaussdb | Sysadmin
| {}
manager20 | Sysadmin
| {}
omm | Sysadmin, Create role, Create DB, Replication, Administer audit, Monitoradmin, Operatoradmin, Policyadmin, U
seFT | {}
role10 | Cannot login, Sysadmin
| {}
role2 | Cannot login
+| {}
| Role valid begin 2021-12-10 00:00:00+08
+|
| Role valid until 2021-12-30 00:00:00+08
|
role3 |
| {omm}
5.删除所有创建角色
omm=# drop role role1;
ERROR: role "role1" does not exist
omm=# drop role role2;
DROP ROLE
omm=# drop role role3;
DROP ROLE
omm=# drop role role10;
DROP ROLE
omm=# \du
List of roles
Role name | Attributes
| Member of
-----------+-------------------------------------------------------------------------------------------------------------
-----+-----------
gaussdb | Sysadmin
| {}
manager20 | Sysadmin
| {}
omm | Sysadmin, Create role, Create DB, Replication, Administer audit, Monitoradmin, Operatoradmin, Policyadmin, U
seFT | {}
过程中使用\du或\du+查看角色信息
omm=# \du
List of roles
Role name | Attributes
| Member of
-----------+-------------------------------------------------------------------------------------------------------------
-----+-----------
gaussdb | Sysadmin
| {}
manager20 | Sysadmin
| {}
omm | Sysadmin, Create role, Create DB, Replication, Administer audit, Monitoradmin, Operatoradmin, Policyadmin, U
seFT | {}
role3 |
| {}
role10 | Cannot login, Sysadmin
| {}
role2 | Cannot login
+| {}
| Role valid begin 2021-12-10 00:00:00+08
+|
| Role valid until 2021-12-30 00:00:00+08
omm=# \du+
-----------+-------------------------------------------------------------------------------------------------------------
-----+-----------+-------------
gaussdb | Sysadmin
| {} |
manager20 | Sysadmin
| {} |
omm | Sysadmin, Create role, Create DB, Replication, Administer audit, Monitoradmin, Operatoradmin, Policyadmin, U
seFT | {} |
role10 | Cannot login, Sysadmin
| {} | List of roles
Role name | Attributes
| Member of | Description
role3 |
| {} |
role2 | Cannot login
+| {} |
| Role valid begin 2021-12-10 00:00:00+08
+| |
| Role valid until 2021-12-30 00:00:00+08
| |
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