注意：keepalived在每一台的服务器上都需要安装

环境介绍：

master_mysql: 10.20.20.51
slave_mysql : 10.20.20.61
virtual_ip : 10.20.20.201

注意：关闭防火墙、selinux
一、安装keepalived

下载地址：
1、 http://www.keepalived.org/software/keepalived-1.1.20.tar.gz

3、安装C编译器
yum install popt-devel openssl-devel popt-devel
yum install gcc gcc-c++ autoconf automake

4、编译安装
[root@node1 ~]# tar zxvf keepalived-1.2.13.tar.gz
[root@node1 keepalived-1.2.13]# cd keepalived-1.2.13
[root@node1 keepalived-1.2.13]# ./configure --prefix=/usr/local/keepalived --disable-fwmark
[root@node1 keepalived-1.2.13]# make
[root@node1 keepalived-1.2.13]# make install
[root@node1 keepalived-1.2.13]# cp /usr/local/keepalived/sbin/keepalived /usr/sbin/
[root@node1 keepalived-1.2.13]# cp /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/
[root@node1 keepalived-1.2.13]# cp /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/
[root@node1 keepalived-1.2.13]# cd /etc/init.d/
[root@node1 init.d]# chkconfig --add keepalived
[root@node1 init.d]# chkconfig keepalived on
[root@node1 init.d]# mkdir -p /etc/keepalived

5、配置keepalived文件
1）主库的keepalived配置文件
vim /etc/keepalived/keepalived.conf
global_defs {


router_id Hadb_1


}


vrrp_sync_group VGM {


group {


VI_HA


}


}


vrrp_script chk_mysql {




script "

interval 1


}


# vvrp_instance define #


vrrp_instance VI_HA {


state MASTER


interface eth0


virtual_router_id 54


priority 100


advert_int 1


authentication {


auth_type PASS


auth_pass hamysql


}


virtual_ipaddress {


10.20.20.201


}


track_script {


chk_mysql


}


}


2）从库的keepalived的配置文件
vim /etc/keepalived/keepalived.conf


global_defs {


router_id Hadb_1


}


vrrp_sync_group VGM {


group {


VI_HA


}


}


vrrp_script chk_mysql {




script "

interval 1


}


# vvrp_instance define #


vrrp_instance VI_HA {


state BACKUP


interface eth0


virtual_router_id 54


priority 50


advert_int 1


authentication {


auth_type PASS


auth_pass hamysql


}


virtual_ipaddress {


10.20.20.201


}


track_script {


chk_mysql


}


}
6、启动keepalived服务
service keepalived start

二、配置mysql的AB复制（互相的AB复制）




1、1.主库配置（master服务器）


#vi /etc/my.cnf
[mysqld]
log-bin=mysql-bin//[必须]启用二进制日志
server-id=51//[必须]服务器唯一ID，默认是1，一般取IP最后一段


2.修改从服务器slave:


#vi /etc/my.cnf
[mysqld]
log-bin=mysql-bin//[必须]启用二进制日志
server-id=61//[必须]服务器唯一ID，默认是1，一般取IP最后一段
3、重启两台服务器的mysql
/etc/init.d/mysql restart


4、在主服务器上建立帐户并授权slave:
10.20.20.51：
mysql>GRANT REPLICATION SLAVE ON *.* to 'repler'@'%' identified by '123.com';


10.20.20.61：
mysql>GRANT REPLICATION SLAVE ON *.* to 'repler'@'%' identified by '123.com';


5、登录主服务器的mysql，查询master的状态
mysql>show master status;
+------------------+----------+--------------+------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+----------+--------------+------------------+
| mysql-bin.000004 | 308 | | |
+------------------+----------+--------------+------------------+

6、配置从服务器Slave：
10.20.20.61：
mysql>change master to master_host='10.20.20.51',master_user='repler',master_password='123.com',
master_log_file='mysql-bin.000004',master_log_pos=308;

10.20.20.51：
mysql>change master to master_host='10.20.20.61',master_user='repler',master_password='123.com',
master_log_file='mysql-bin.000004',master_log_pos=308;
7、启动从服务器复制功能
mysql>start slave;

8、检查从服务器复制功能状态：
mysql> show slave status\G