mysql5.5 master-slave(Replication)配置方法,需要的朋友可以参考下。
一主一从:Master:
OS:centos release 5.6 DB:mysql 5.5.8 IP:192.168.1.2
Slave:
OS:centos release 5.6 DB:mysql 5.5.8 IP:192.168.1.3
修改主机Master配置文件 (/etc/my.cnf)
代码如下:
[mysqld]
//至少要有server-id、与log-bin两项
server-id=1
log-bin=/var/lib/mysql/mysql-bin
datadir=/var/lib/mysql
//为了使用事务的InnoDB在复制中最大的持久性和一致性,你应该指定innodb_flush_log_at_trx_commit=1,sync_binlog=1选项
innodb_flush_log_at_trx_commit=1
sync_binlog=1
在主机Master创建一个有复制权限的用户
mysql>create user repl_user@192.168.1.3;
mysql>grant replication slave on *.* to repl_user@192.168.1.3 identified by '123456';
锁住主机,记录二进制日志的位置(后面设置从机的时候会用到)
mysql>flush tables with read lock;
mysal>show master status;
File:mysql-bin.000013 Position:7863951
复制主机数据库(test)到从机
shell>/usr/bin/mysqldump test -uroot -padmin --opt | mysql test -uroot -padmin -h 192.168.1.3
重新打开主机Master写操作功能
mysql>unlock tables;
修改从机Slave配置文件(/etc/my.cnf)
代码如下:
[mysqld]
server-id=2 //必须是1到2的32次方之间的一个整数,且必须和主机Master的server-id不一样
relay-log-index=slave-relay-bin.index
relay-log=slave-relay-bin
replicate-do-db=test //指定复制数据库
datadir=/var/lib/mysql
从机Slave初始化复制
代码如下:
mysql>slave stop;
mysql>change master to master_host='192.168.1.2',
->master_user='repl_user',
->master_password='123456',
->master_log_file='mysql-bin.000013',
->master_log_pos=7863951;
开启复制
mysql>start slave;
查看复制状态
mysql>show slave status\G
测试复制:
在主机master中对test数据库进行sql操作,再查看从机test数据库是否产生同步。
Slave SQL错误导致同步卡住的一种处理方法
代码如下:
mysql>slave stop;
mysql>set GLOBAL SQL_SLAVE_SKIP_COUNTER=1;
mysql>slave start;

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