mysql主从同步配置测试步骤图例 目的: 测试主从mysql之间的数据库同步效果 测试环境: Master(主): RHEL 5.5 x86-64 Mysql.5.0.77 ip: 10.86.21.147 Slave(从): RHEL 5.5 x86-64 Mysql.5.0.77 ip: 10.86.21.146 测试数据库名称:leadtest 测试表:user M
mysql主从同步配置测试步骤图例
目的:
测试主从mysql之间的数据库同步效果
测试环境:
Master(主): RHEL 5.5 x86-64 Mysql.5.0.77 ip: 10.86.21.147
Slave(从): RHEL 5.5 x86-64 Mysql.5.0.77 ip: 10.86.21.146
测试数据库名称:leadtest
测试表:user
Mysql账号 root 密码:redhat
主服务器端建立同步测试数据库
一:配置Master的配置文件/etc/my.cnf,供同步使用。
vi /etc/my.cnf
在原有的基础上添加如下内容:
Server_id=1 1代表主端2代表从端
binlog-do-db=leadtest要同步的数据库
log-bin=mysql-bin 数据库二进制日志
二:重新启动 /etc/init.d/mysqld restart
三:mysql–u root –p 在主端上登陆mysql服务器
四:创建库:create database leadtest;
然后我们要添加一个MySQL帐号为同步专用的用户,这里以root用户为例子,同步账号必须要有对操作数据库的增删改查权限
同步账号实质上是供从端使用的。
GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIEDBY 'redhat' WITH GRANT OPTION;
这句的意思说允许root用户以redhat为密码从任意网段远程登陆10.86.21.147(主端)
保存退出,/etc/init.d/mysqld restart 重启服务即可。
Slave端的配置:
一:安装slave端的Mysql。安装步骤与主端一样。
安装完成以后启动mysqld服务,检查是否可以正常启动/登陆
/etc/init.d/mysqld start
二:测试是否可以登陆到本地的mysql服务器mysql -u root -p
三:修改slave(从端)的配置文件/etc/my.cnf,供同步使用。
Vi /etc/my.cnf
在原有的基础上添加如下内容:
server-id=2
master-host=10.86.21.147 主端地址
master-user=root 同步专用用户(主端提供的用户)
master-password=redhat该用户的密码
master-port=3306 主端mysql端口
master-connect-retry=60断开重连次数
replicate-do-db=leadtest接受要同步的数据库
保存退出,重启服务即可。
/etc/init.d/mysqldrestart
检查数据库同步情况:
一:首先登陆主端show databases;查看的数据库“leadtest”是否创建成功。
二:在Slave端show databases;查看是否有leadtest数据库被同步(创建)过来
在主端创建测试表“user”并设置字段
命令:
USE leadtest;
CREATE TABLE `user` (
`id` int(11) NOT NULL auto_increment,
`name` varchar(20) character set utf8 NOTNULL,
`sex` varchar(2) character set utf8 NOTNULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
一:在主端使用show tables;命令查看创建的表是否生效。
二:在从端查看是否有user表被创建(同步)
useleadtest;
show tables;
数据库增删改操作后的数据库同步效果验证
【查询操作】
主端对user表插入数据并查询是否插入成功:
insert into user(id,name, sex)values('2', 'user2', 'na');
select * fromuser;
从端查询插入的数据是否出现记录:
Select * fromuser;
【增加操作】
主端增加一条记录
insert intouser(id, name, sex)values('3', 'user3', 'na');
从端查询是否有记录增加
【修改操作】
在主端先插入数据再进行update操作
update user setname='user1' where name='user2';
user2改为user1
从端查询是否有数据变化
【删除操作】
主端删除一条记录操作
delete from userwhere id='3';
从端查询是否有变化
至此对mysql主从同步数据的测试就到这里
故障排除记录:
同步不成功的话,进入数据库查看主从的运行状态,show master/slave status\G;
如果出现以下错误的话Slave_IO_Running: NO Slave_SQL_Running: NO 是主从的参数不一致造成的。
解决方法:
在主端使用 show master status \G; 查Position: 数值再手动推送记录:
进入从数据库,先使用slavestop;停止slave状态,然后再用命令:change master toMaster_Log_File='mysql-bin.0000020', Master_Log_Pos = 98;红色部分根据自己master端进行修改。
如果有新添加的库要同步,此方法同样可以使用。如果出现Slave_IO_Running: NO 的话说明主从之间问题,可以删除/var/lib/mysqld/master.info文件尝试一下。

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