Mysql主从搭建详解

Mysql主从配置

系统环境：

Centos6.5     
Mysql5.6
IP：1.1.1.1   主 
    1.1.1.2   从

操作之前先将iptables以及selinux关闭，方便测试，后期开放相应端口即可

1.修改配置文件,开启binlog以及指定server ID(两个server ID不能一样)

修改主库，1.1.1.1
vim /etc/my.cnf
server-id=1
log-bin=mysql-bin
/etc/init.d/mysqld restart

修改从库，1.1.1.2
vim /etc/my.cnf
server-id=2
log-bin=mysql-bin   
/etc/init.d/mysqld restart

2.给两个数据库设置密码（初始没有密码，直接执行mysql命令登录）

use mysql
update user set password=password('666666') where user='root';

3.同步数据(第一次需要将主数据库中的数据手动同步到从数据库)

主库操作，1.1.1.1
mysqldump -uroot -p666666 --all-databases > /root/mysql.dump
scp /root/mysql.dump 1.1.1.2:/root/

从库操作，1.1.1.2
mysql -uroot -p666666
source /root/mysql.dump

4.配置主从

主库操作，1.1.1.1
mysql -uroot -p666666
grant replication slave on *.* to 'replication'@'1.1.1.2' identified by 'replication';
 show master status;
+------------------+----------+--------------+------------------+-------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+------------------+-------------------+
| mysql-bin.000011 |    22939 |              |                  |                   |
+------------------+----------+--------------+------------------+-------------------+

从库操作，1.1.1.2
mysql -uroot -p666666
mysql> change  master to
    -> master_host='1.1.1.1',
    -> master_user='replication',
    -> master_password='replication',
    -> master_log_file='mysql-bin.000011',
    -> master_log_pos=22939;
启动
start slave;
查看配置是否正常
mysql -uroot -p666666 -e 'show slave status\G' |grep 'Running'

Slave_IO_Running: Yes
Slave_SQL_Running: Yes

5.测试主从同步是否正确

主库操作，1.1.1.1
mysql -uroot -p666666
show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| cmdb               |
| luanma             |
| mysql              |
| performance_schema |
| t2                 |
| test               |
| yhl                |
+--------------------+

create database zc_test charset utf8;
show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| cmdb               |
| luanma             |
| mysql              |
| performance_schema |
| t2                 |
| test               |
| yhl                |
| zc_test            |
+--------------------+

从库操作，1.1.1.2
show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| cmdb               |
| luanma             |
| mysql              |
| performance_schema |
| t2                 |
| test               |
| yhl                |
| zc_test            |
+--------------------+

主库操作，1.1.1.1
use zc_test;
创建一个表
create table yhl(id int,name varchar(20),password varchar(50)) charset utf8;
插入数据
insert into yhl value(1,'yhl',123456);
查看
select * from yhl;
+------+------+----------+
| id   | name | password |
+------+------+----------+
|    1 | yhl  | 123456   |
+------+------+----------+

从库操作，1.1.1.2
use zc_test;
select * from yhl;
+------+------+----------+
| id   | name | password |
+------+------+----------+
|    1 | yhl  | 123456   |
+------+------+----------+

主库操作，1.1.1.1
drop table yhl;
select * from yhl;
ERROR 1146 (42S02): Table 'zc_test.yhl' doesn't exist

从库操作，1.1.1.2
select * from yhl;
ERROR 1146 (42S02): Table 'zc_test.yhl' doesn't exist

至此，说明配置正常