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HomeDatabaseMysql Tutorial利用Keepalived构建双主MySQL

使用MySQL双master+keepalived是一种非常好的解决方案,在MySQL-HA环境中,MySQL互为主从关系,这样就保证了两台MySQL数据的一致

使用MySQL双master+keepalived是一种非常好的解决方案,在MySQL-HA环境中,MySQL互为主从关系,这样就保证了两台MySQL数据的一致性,然后用keepalived实现虚拟IP,通过keepalived自带的服务监控功能来实现MySQL故障时自动切换。

下面,我把即将上线的一个生产环境中的架构与大家分享一下,看一下这个架构中,MySQL-HA是如何实现的,环境拓扑如下

MySQL-VIP:10.10.10.21 

MySQL-master1:10.10.10.17

MySQL-master2:10.10.10.18

OS版本:RedHat6.2 

MySQL版本:mysql-5.1.59

Keepalived版本:keepalived-1.1.20

一、MySQL master-master配置

1、修改MySQL配置文件

两台MySQL均如要开启binlog日志功能,开启方法:在MySQL配置文件[MySQLd]段中加上log-bin=MySQL-bin选项

两台MySQL的server-ID不能一样,默认情况下两台MySQL的serverID都是1,需将其中一台修改为2即可

Master1配置:

#vim /etc/my.cnf

log-bin=mysql-bin   //开启binlog日志功能

log =/usr/local/mysql/var/mysql.log    //会打印mysql的所以sql语句

 

server-id= 1  //

binlog-do-db =mysql    //需要同步的库名称

auto-increment-increment= 2

auto-increment-offset= 2

 

Master2配置:

#vim /etc/my.cnf

log-bin=mysql-bin    //开启binlog日志功能

log =/usr/local/mysql/var/mysql.log  //会打印mysql的所以sql语句

 

server-id= 2

binlog-do-db =mysql   //需要同步的库名称

auto-increment-increment= 2

auto-increment-offset= 2

 

2、建授权用户

在10.10.10.17上新建授权用户

grant replicationslave on *.* to test@’10.10.10.%’ identified by ‘123456’;   

在10.10.10.18服务器上建授权用户

grant replicationslave on *.* to test@’10.10.10.%’ identified by ‘123456’;      

 

3、将10.10.10.17设为10.10.10.18的主服务器                                                                                                                                                                                                                                                                                                        

在10.10.10.18上将10.10.10.17设为自己的主服务器

mysql> show master status;(17服务器配置)

1+------------------+----------+--------------+------------------+

| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |

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

| mysql-bin.000027|   106|mysql    |    |

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

1 row in set (0.01 sec)

MySQL> change master to master_host='10.10.10.17',master_user=’test’,master_password='123456',master_log_file='MySQL-bin.000027',master_log_pos=106;

Query OK, 0 rows affected (0.05 sec)

MySQL> start slave;

Query OK, 0 rows affected (0.00 sec)

mysql> show slave status \G

Slave_IO_Running: Yes 

Slave_SQL_Running: Yes   \\如果此2项都为yes,master-master配置即成功

 

将10.10.10.18设为10.10.10.17的主服务器  方法与上面设置一致只需将

在10.10.10.17上将10.10.10.18设为自己的主服务器

mysql> show master status;(18服务器配置)

1+------------------+----------+--------------+------------------+

| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |

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

| mysql-bin.000027|   106|mysql    |    |

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

1 row in set (0.01 sec)

MySQL> change master to master_host='10.10.10.18',master_user=’test’,master_password='123456',master_log_file='MySQL-bin.000027',master_log_pos=106;

Query OK, 0 rows affected (0.05 sec)

MySQL> start slave;

Query OK, 0 rows affected (0.00 sec)

mysql> show slave status \G

Slave_IO_Running: Yes 

Slave_SQL_Running: Yes   \\如果此2项都为yes,,master-master配置即成功

测试是否成功:

如上述均正确配置,现在在任何一台MySQL上更新数据都会同步到另一台MySQL(仅限mysql库)

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