mysql主从同步
1、192.168.56.20（主）和192.168.56.21（从）安装MYSQL6.5数据库
wget http://repo.mysql.com/mysql-community-release-el6-5.noarch.rpm
rpm -ivh mysql-community-release-el6-5.noarch.rpm
yum repolist all | grep mysql
yum install mysql-community-server -y
2、启动
service mysqld start
3、创建用户具有同步权限，192.168.56.21是从库的ip
创建数据库
mysql> create database test1;
mysql> use test1;
mysql> set names utf8;
grant replication slave on . to ‘repl‘@‘192.168.56.21‘ identified by ‘repl‘;
flush privileges;
3、修改主节点配置文件
vim /etc/my.cnf
server-id=101 #每个节点必须不一样
log-bin=/var/lib/mysql/mysql-bin
4、重新启动主库的msyqld服务
service mysqld restart
5、登录数据库设置数据库读锁
mysql>flush tables with read lock;
6、查看binlog日志文件名和偏移量（mysql-bin.000001和120）
mysql> show master status;
+------------------+----------+--------------+------------------+-------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+------------------+-------------------+
| mysql-bin.000001 | 120 | | | |
+------------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)
7、备份数据库到当前目录
ysqldump test1 > test1.sql
8、复制sql文件到从库
scp test1.sql 192.168.56.21:/var/lib/mysql/
9、解锁
mysql> unlock tables;
10、从库导入sql文件到test1
mysql> create database test1;
mysql> use test1;
mysql> set names utf8;
mysql> source /var/lib/mysql/test1.sql;
11、编辑从库配置文件
vim /etc/my.cnf
server-id=109
12、重启从库服务
service mysqld restart
13、配置从库
关闭复制功能
mysql> stop slave;
mysql>change master to master_host=‘192.168.56.20‘,master_user=‘repl‘,master_password=‘repl‘,master_log_file=‘mysql-bin.000001‘,master_log_pos=120;
启动复制
Mysql>start slave;
检查复制功能
mysql>show slave status\G
两个进程需要yes才正常
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
14、在主库新建数据库，然后去从库看是否同步，同步表示正常。
create database hi_db;
原文地址：http://blog.51cto.com/13491150/2062428