為了防止使用者對從庫進行插入，采用read-only參數：
配置：
[[email protected] data]# grep read-only /etc/my.cnf
read-only
試驗過程：
主庫授權ALL
mysql> grant all on *.* to 'imbyrd'@'localhost' identified by 'admin';
從庫測試：
[[email protected] data]# /usr/local/mysql/bin/mysql -uimbyrd -p'admin'
mysql> use hitest;
mysql> insert into test(id,name) values(14,'fo');
Query OK, 1 row affected (0.14 sec)
主庫授權select,insert,update,delete
mysql> REVOKE all ON *.* FROM 'imbyrd'@'localhost';
mysql> grant select,insert,update,delete on *.* to 'imbyrd'@'localhost' identified by 'admin';
mysql> show grants for [email protected]'localhost';
+----------------------------------------------------------------------------------------------------------------------------------------+
| Grants for [email protected] |
+----------------------------------------------------------------------------------------------------------------------------------------+
| GRANT SELECT, INSERT, UPDATE, DELETE ON *.* TO 'imbyrd'@'localhost' IDENTIFIED BY PASSWORD '*4ACFE3202A5FF5CF467898FC58AAB1D615029441' |
+----------------------------------------------------------------------------------------------------------------------------------------+
1 row in set (0.00 sec)
從庫測試：
mysql> use hitest;
mysql> insert into test(id,name) values(16,'dddd');
ERROR 1290 (HY000): The MySQL server is running with the --read-only option so it cannot execute this statement
主庫配置：
mysql> grant all on *.* to 'imbyrd'@'localhost' identified by 'admin';
mysql> show grants for [email protected]'localhost'＼G
*************************** 1. row ***************************
Grants for [email protected]: GRANT ALL PRIVILEGES ON *.* TO 'imbyrd'@'localhost' IDENTIFIED BY PASSWORD '*4ACFE3202A5FF5CF467898FC58AAB1D615029441'
1 row in set (0.00 sec)
mysql> REVOKE SUPER ON *.* FROM 'imbyrd'@'localhost';
mysql> show grants for [email protected]'localhost'＼G
*************************** 1. row ***************************
Grants for [email protected]: GRANT SELECT, INSERT, UPDATE, DELETE, CREATE, DROP, RELOAD, SHUTDOWN, PROCESS, FILE, REFERENCES, INDEX, ALTER, SHOW DATABASES, CREATE TEMPORARY TABLES, LOCK TABLES, EXECUTE, REPLICATION SLAVE, REPLICATION CLIENT, CREATE VIEW, SHOW VIEW, CREATE ROUTINE, ALTER ROUTINE, CREATE USER, EVENT, TRIGGER, CREATE TABLESPACE ON *.* TO 'imbyrd'@'localhost' IDENTIFIED BY PASSWORD '*4ACFE3202A5FF5CF467898FC58AAB1D615029441'
1 row in set (0.00 sec)
從庫測試：
[[email protected] data]# /usr/local/mysql/bin/mysql -uimbyrd -p'admin'
mysql> use hitest;
mysql> insert into test(id,name) values(23,'fddf');
ERROR 1290 (HY000): The MySQL server is running with the --read-only option so it cannot execute this statement
結論：當使用者權限中沒有SUPER權限(ALL權限是包括SUPER的)時，從庫的read-only生效！