数据库主从配置与主从重置

一、master_db    /etc/my.cnf内容

binlog-do-db=zhxq

binlog-do-db=register

binlog-ignore-do=mysql

replicate-do-db=zhxq

replicate-do-db=register

replicate-ignore-db=mysql

log-bin=mysql-bin

server-id=1

log-slave-updates=1

skip-slave-start

 

二、slave_db    /etc/my.cnf内容

binlog-do-db=zhxq

binlog-do-db=register

binlog-ignore-do=mysql

replicate-do-db=zhxq

replicate-do-db=register

replicate-ignore-db=mysql

log-bin=mysql-bin

server-id=2

log-slave-updates=1

skip-slave-start

 

三、重启主从mysql服务

1.查看master_db的状态，show master status

2.在slave_db上登录mysql

mysql>change master to master_host='192.168.137.11',master_port=3306, master_user='slave', master_password='123456',MASTER_LOG_FILE='mysql-bin.000015',MASTER_LOG_POS=106;

mysql>start slave;

 

四、mysql宕机恢复之后重置主从

1.       查看mycat日志，主从切换的时间

2.       停止slave_db的主从同步

3.       查看slave_db的二进制日志，找到开始写slave_db的位置position

4.       slave_db，mysql>reset slave all

5.       重新启动master_db

6.       在master_db上

mysql>change master to master_host='192.168.137.11',master_port=3306, master_user='slave', master_password='123456',MASTER_LOG_FILE='mysql-bin.000015',MASTER_LOG_POS=106;

         mysql>start slave;

7.       mycat的schema.xml修改，更换主从

8.       mycat的dnindex.property改为0

9.       重启mycat