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mysql主从复制

实验环境

主：192.168.110.33

从：192.168.110.59

iptables and selinux disabled

主：云服务器端

1.安装并初始化

# yum install -y mysql -mysql-server

#/etc/init.d/mysql start

# mysql_secure_installation #设置root密码

Set root password? [Y/n] y

New password:

Re-enter new password:

Password updated successfully!

Reloading privilege tables..

... Success!

Remove anonymous users? [Y/n] y

Disallow root login remotely? [Y/n] y

Remove test database and access to it? [Y/n] y

Reload privilege tables now? [Y/n] y

2.用户、修改/etc/my.cnf文件

# id mysql

uid=27(mysql) gid=27(mysql) groups=27(mysql)

# cp /usr/share/mysql/my-medium.cnf /etc/my.cnf

57 server-id = 1 #id唯一

59 binlog-do-db = test #指定同步test数据库

60 binlog-ignore-db = mysql #避免同步 mysql 数据库,以免不必要的麻烦

3.创建同步账户并授权

# mysql -p密码

mysql> create database test;

Query OK, 1 row affected (0.00 sec)

mysql> use test;

mysql> create table mysql( username varchar(25) not null, password varchar(25) not null);

mysql> desc mysql;

+----------+-------------+------+-----+---------+-------+

| Field | Type | Null | Key | Default | Extra |

+----------+-------------+------+-----+---------+-------+

| username | varchar(25) | NO | | NULL | |

| password | varchar(25) | NO | | NULL | |

+----------+-------------+------+-----+---------+-------+

mysql> insert into mysql value('girl',123)；

mysql> insert into mysql value('boy',123) ;

mysql> select * from mysql;

+----------+----------+

| username | password |

+----------+----------+

| girl | 123 |

| boy | 123 |

+----------+----------+

mysql> GRANT REPLICATION SLAVE,RELOAD,SUPER ON *.* TO cyl@'192.168.110.%' IDENTIFIED BY 'cyl&647308';

mysql> flush privileges;

mysql> quit

Bye

3.备份test数据库并发送二进制日志到从

[root@cyl_test1 mysql]# pwd

/var/lib/mysql

# file mysql-bin.000003

mysql-bin.000003: MySQL replication log

# mysqldump -p'cyl&647308' test > test.sql或

#mysqldump -p'数据库密码' test > test.sql

# scp test.sql mysql-bin.000003 192.168.110.59:

从:客户端

1.安装、初始化、修改/etc/my.cnf文件

# yum install -y mysql -mysql-server

#/etc/init.d/mysql start

# mysql_secure_installation #设置root密码

Set root password? [Y/n] y

New password:

Re-enter new password:

Password updated successfully!

Reloading privilege tables..

... Success!

Remove anonymous users? [Y/n] y

Disallow root login remotely? [Y/n] y

Remove test database and access to it? [Y/n] y

Reload privilege tables now? [Y/n] y

# vim /etc/my.cnf

server-id = 2 #id唯一

2.用户、登录同步账户（用户必须与服务端保持一致）

# id mysql

uid=27(mysql) gid=27(mysql) groups=27(mysql)

# mysql -ucyl -p'cyl&647308' -h 192.168.110.33

mysql> show databases; #若没有test数据库手动创建

+--------------------+

| Database |

+--------------------+

| information_schema |

| mysql |

| test |

+--------------------+

mysql> quit

Bye

3.将数据库导入，登录数据库看到数据同步成功（在服务端发送二进制文件的位置）

# mysql -p'cyl&647308' test

#mysql -p'数据库密码' test < test.sql

# mysql -p密码

mysql> use test;

mysql> show tables;

+----------------+

| Tables_in_test |

+----------------+

| mysql |

+----------------+

mysql> select * from mysql;

+----------+----------+

| username | password |

+----------+----------+

| girl | 123 |

| boy | 123 |

+----------+----------+

主：服务端

在服务端查看master的状态

mysql> show master status;

+------------------+----------+--------------+------------------+

| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |

+------------------+----------+--------------+------------------+

| mysql-bin.000003 | 1834 | test | mysql |

+------------------+----------+--------------+------------------+

从：客户端

在客户端设置允许服务端同步数据

# mysql -p

mysql> stop slave;

mysql> change master to master_host='192.168.110.33', master_user='cyl',master_password='cyl&647308', master_log_file='mysql-bin.000003',master_log_pos=1834; #此用户为master端授权的同步用户

mysql> start slave;

mysql> show slave status\G;

Slave_IO_State: Waiting for master to send event

Master_Host: 192.168.110.33

Master_User: cyl

Master_Port: 3306

Connect_Retry: 60

Master_Log_File: mysql-bin.000003

Read_Master_Log_Pos: 1834

Relay_Log_File: mysqld-relay-bin.000002

Relay_Log_Pos: 251

Relay_Master_Log_File: mysql-bin.000003

Slave_IO_Running: Yes

Slave_SQL_Running: Yes

主：服务端

改动数据库数据观察从是否同步

# mysql -p密码

mysql> use test;

mysql> insert into mysql value ('love',123);

mysql> select * from mysql;

+----------+----------+

| username | password |

+----------+----------+

| girl | 123 |

| boy | 123 |

| love | 123 |

+----------+----------+

从：客户端

# mysql -p密码

mysql> use test;

mysql> select * from mysql;

+----------+----------+

| username | password |

+----------+----------+

| girl | 123 |

| boy | 123 |

| love | 123 |

+----------+----------+

主：服务端

mysql> delete from mysql where username='love';

从：客户端

mysql> select * from mysql;

+----------+----------+

| username | password |

+----------+----------+

| girl | 123 |

| boy | 123 |

+----------+----------+

看了以上关于mysql主从复制实验环境测试，希望能给大家在实际运用中带来一定的帮助。本文由于篇幅有限，难免会有不足和需要补充的地方，如有需要更加专业的解答，可在官网联系我们的24小时售前售后，随时帮您解答问题的。

 

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