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HomeDatabaseMysql TutorialMysql数据库读写分离配置_MySQL

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环境模拟

实现读写分离 减轻数据库的负荷
主服务器 master 10.0.0.12
从服务器 slave 10.0.0.66

 

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配置主服务器: 在10.0.0.12服务器操作
创建数据库
create database mydemo;

 

1.修改配置文件

vi /etc/my.cnf
在[mysqld] 后面添加下面的代码

sync_binlog=1binlog-do-db=mydemo #设置需要同步的数据库名binlog_ignore_db=mysql  #不需要同步的数据库  如果有多个不需要同步则依次列出# binlog_ignore_db=xxxx    保存退出  :wq   2. 重新启动mysql 服务器     service mysqld restart   3.进入mysql平台 设置需要同步的用户账号	create user '用户名'@'从服务器ip地址' identified by '密码'  	create user 'eduask'@'10.0.0.66' identified by 'test123'  #创建一个从服务器用户同步到主服务器	4. 给slave 用户赋权限         grant all  on *.* to 'eduask'@'10.0.0.%' identified by 'test123'	 grant replication slave  on *.* to 'eduask'@'10.0.0.66' identified by 'test123'  允许从服务器用户远程登录	5.刷新授权表	flush privileges	6.给数据库创建测试数据库	create table userinfo(		uid  int primary key auto_increment,		uname char(30) not null,		upwd  char(30) not null	);	insert into userinfo (`uid`,`uname`,`upwd`) values(null,'aaa','test123')      7.退出系统   	/q  exit      ------------从服务器配置完成后再操作-----------	8. 导出主服务器数据库 传递到从服务器	/usr/local/web/mysql/bin/mysqldump -uroot -ptest123 数据库名 > /home/数据库名.sql        scp  从哪里  到哪里	scp  /home/数据库名.sql  root@10.0.0.66:/home	[提示: 如果系统提示你是否远程传输 yes]	系统会提示你输入密码: test123	9.重新启动主服务器	service mysqld stop 	service mysqld start	10. 进入mysql 平台      /usr/local/web/mysql/bin/mysql -uroot -ptest123       11.查询主服务器状体 master        show master status;        运行后mysql 会显示一个当前master 的服务器日志状况表,我们需要记住两个字段的值	file: mysql-bin.000006 #这是需要同步的master 的二进制文件	position:519-----------------------------------------------------------------------------------------------------------------------配置从服务器   (在 10.0.0.66)	1.进入mysql 平台	 /usr/local/web/mysql/bin/mysql -uroot -ptest123	2.创建数据库	create database mydemo;	eixt	3.导入master 的数据库	 /usr/local/web/mysql/bin/mysql -uroot -ptest123 数据库名 < /home/数据库名.sql	4.配置从服务器mysql 配置文件	vi /etc/my.cnf	找到 server-id=1 改成 2  (注意:server-id 必须要比master 的大 关键是不能重复)	在 [mysqld] 后面添加	 replicate-do-db=mydemo  #配置需要同步的数据库名         保存文件 	:wq	5.重启mysqld	 service mysqld restart	6.以root用户登录mysql 平台	 /usr/local/web/mysql/bin/mysql -uroot -ptest123	 stop slave;	 change master to  master_host='10.0.0.12', #master ip				master_user='eduask',  #master 用户名				master_password='test123', #master 密码				master_port=3306,	#master 端口				master_log_file='mysql-bin.000006', #master 需要同步的二进制				master_log_pos=519,  #master pos				master_connect_retry=60; #连接master 的时间	7.启动slave	start slave;	8. 查看是否连接同步成功		show slave status/G;          如果 SLAVE_IO_running  yes		slave_sql_running yes           这两个参数都为 yes 则表示成功 否则失败----------------------------------------------------------------------------------------------------------------------测试主从数据库同步  1.进入主服务器	 /usr/local/web/mysql/bin/mysql -uroot -ptest123	use  mydemo;	insert into userinfo(uid,uname,upwd) values(nuull,'111','222'); 2. 进入从服务器     /usr/local/web/mysql/bin/mysql -uroot -ptest123	use  mydemo;   select * from  userinfo; 如果从服务器中有master 的数据 成功

  

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