MYSQL主从切换

1修改配置文件

read-only=1（主库）

#read-only=1（备库）

2、查看主备库状态

show slave status \G

show master status\G

3、操作备库

STOP SLAVEIO_THREAD;

SHOW PROCESSLIST;

看到Has read all relay log

show slave status \G

STOP SLAVE;

RESET MASTER;

RESET SLAVE;

grant replication slave on *.* to‘testuser‘@‘10.45.172.40‘ identified by ‘test123‘;

show master status\G

如执行reset master;后

遇到ERROR 1186 (HY000): Binlog closed, cannot RESET MASTER的问题

处理方法：

修改vim /etc/my.cnf

加上log-bin=mysql-bin

重启mysqld服务。

4、操作主库

show master status\G

RESET MASTER;

RESET SLAVE;

CHANGE MASTER TO

MASTER_HOST=‘10.45.172.37‘,

MASTER_USER=‘testuser‘,

MASTER_PASSWORD=‘test123‘,

MASTER_PORT=3306,

MASTER_LOG_FILE=‘mysql-bin.000001‘,

MASTER_LOG_POS=98,

MASTER_CONNECT_RETRY=60;

5、重启新主从库，开启slave进程

Start slave

SHOW PROCESSLIST;

show slave status \G