此文章来源于我的另一个博客转载过来。
数据库主从互备
实验环境：
centos 6.3 64bit
mysql版本：mysql-5.5.28
server1=192.168.1.38
server2=192.168.1.39
1.38
1、初始化数据库
#service mysqld stop
#/usr/local/mysql/scripts/mysql_install_db --user=mysql --basedir=/usr/local/mysql --datadir=/usr/local/mysql/var
#service mysqld start \\重新启动mysld
2、修改root密码
#mysql
mysql>use mysql;
mysql>update user set password=password('root') where user='root'; //把root密码修改为root
mysql>flush privileges;
mysql>exit
3、创建数据同步用户，并授权只允许master-slave IP登陆
mysql>use mysql;
mysql>insert into mysql.user (Host,User,Password) values ('localhost','repluser',password('repluser'));
mysql>grant all privileges on *.* to 'repluser'@'192.168.1.39' identified by 'repluser';
mysql>flush privileges;
4、创建普通测试用户soul，允许在任何IP登陆访问
mysql>use mysql;
mysql>insert into mysql.user (Host,User,Password) values ('%',‘soul',password('soul'));
mysql>grant all privileges on *.* to 'soul'@'%' identified by 'soul';
mysql>flush privileges;
5、导入数据库mobiledb
#mysql -uroot -p
mysql>use mysql;
mysql>create database mobiledb; //先创建数据库
mysql>quit
#mysql -uroot -p mobiledb < /home/databackup/mobiledb.sql
或者在控制界面source导入
#mysql -uroot -p
mysql>source /home/databackup/mobiledb.sql;
1.39
6、数据库初始化
#service mysqld stop
#/usr/local/mysql/scripts/mysql_install_db --user=mysql --basedir=/usr/local/mysql --datadir=/usr/local/mysql/var
#service mysqld start \\重新启动mysld
7、把1.38数据库var目录拷贝到1.39代替掉原来的var
1.38#server mysqld stop
1.39#server mysqld stop
1.38#scp -P43998 -r /usr/local/mysql/var [email protected]:/usr/local/mysql/
8、重启两套服务器的mysqld
1.38#service mysqld start
1.39#chown mysql.mysql /usr/local/mysql/var -R \\务必要对数据存放目录的属主改为mysql放有权限
1.39#service mysqld start
9、在1.39上创建同步用户
mysql>use mysql;
mysql>insert into mysql.user (Host,User,Password) values ('localhost','repluser',password('repluser'));
mysql>grant all privileges on *.* to 'repluser'@'192.168.1.38' identified by 'repluser';
mysql>flush privileges;
10、先在1.39做单向同步1.38的数据
a:查看主1.38mysql的master
1.38#mysql -uroot -p
mysql> show master status\G;
*************************** 1. row ***************************
File: mysql-bin.000011
Position: 676
Binlog_Do_DB:
Binlog_Ignore_DB:
1 row in set (0.01 sec)
ERROR:
No query specified
1.39#mysql -uroot -p
mysql> change master to MASTER_HOST='192.168.1.38',
-> MASTER_USER='repluser',
-> MASTER_PASSWORD='repluser',
-> Master_Port=3307,
-> Master_Log_File='mysql-bin.000011',
-> Master_Log_Pos=676;
#start slave; \\启动同步
查看结果
mysq>show slave status\G;
目前结果：1.39能单步同步1.38的数据
11、在1.38上做同步1.39上的数据
b:查看1.39mysql master 的日志
1.39#mysql -uroot -p
mysql> show master status\G;
*************************** 1. row ***************************
File: mysql-bin.000014
Position: 338
Binlog_Do_DB:
Binlog_Ignore_DB:
1 row in set (0.01 sec)
ERROR:
No query specified
1.38#mysql -uroot -p
mysql> change master to MASTER_HOST='192.168.1.39',
-> MASTER_USER='repluser',
-> MASTER_PASSWORD='repluser',
-> Master_Port=3307,
-> Master_Log_File='mysql-bin.000014',
-> Master_Log_Pos=338;
#start slave; \\启动同步
查看结果：
测试结果：1.38 1.39能实时两边同步。
注意：检查1.38 1.39 的所有my.cnf配置文件 server-id 不能相同 server-id必须唯一值