通过keepalived搭建MySQL双主模式的高可用集群系统

时间:2022-12-22 13:57:45

1. 配置MySQL双主模式

1.修改my.cnf配置文件

默认情况下,MySQL的配置文件是/etc/my.cnf,在配置文件的[mysqld]段添加如下内容:

server-id=1
log-bin=mysql-bin
relay-log=mysql-relay-bin
  • server-id:是节点标识,主从节点不能相同必须全局唯一
  • log-bin:表示开启MySQL日志功能,"mysql-bin"表示日志文件的命名格式
  • relay-log:用来定义relay-log日志文件的命名格式
2.登录MySQL,授权服务器replication权限及配置从服务器,注意因为是双主模式所以所有操作都为双向操作。

MySQL master授权replication

grant replication slave on *.* to 'Federico'@'192.168.1.2' identified by '123456';
show master status;

MySQL slave指定master服务器,并查看当前服务是否主从复制成功

stop slave;
change master to master_host='192.168.1.1',master_user='Federico',master_password='123456',master_port=3306,master_log_file='mysql-bin.000001',master_log_pos=336;
start slave;
show slave status\G

查看以下两项参数为yes,证明主从复制设置成功。

             Slave_IO_Running: Yes
            Slave_SQL_Running: Yes

注意:以上操作为双向操作,及互为主从,达到双主的效果。

3. 配置MySQL数据库可以远程登录,即我们的其他服务可以通过vip进行登录
grant all on *.* to'Federico'@'%' identified by '123456';

2.配置keepalived实现MySQL双主高可用

修改keepalived配置文件
#keepalived master配置文件
! Configuration File for keepalived
global_defs {
   router_id HA_MySQL
}
vrrp_script check_mysql {
    script "pkill -0 -x mysqld"  
    interval 2  
    fall 2      
    raise 2   
}
vrrp_instance VI_1 {
    state MASTER
    nopreempt    
    interface eth0
    virtual_router_id 51
    priority 100
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        192.168.1.100   
    }
    track_script {
        check_mysql
    }
}


#keepalived backup配置文件
! Configuration File for keepalived
global_defs {
   router_id HA_MySQL
}
vrrp_script check_mysql {
    script "pkill -0 -x mysqld"  
    interval 2  
    fall 2      
    raise 2   
}
vrrp_instance VI_1 {
    state BACKUP    
    interface eth0
    virtual_router_id 51
    priority 100
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        192.168.1.100   
    }
    track_script {
        check_mysql
    }
}

3.在MySQL客户端通过vip登录,查看是否登录成功

mysql -u Federico -h 192.168.1.100 -p