安装依赖插件：
yum install -y gcc openssl-devel popt-devel


keepalived下载地址：http://www.keepalived.org/download.html

wget https://www.keepalived.org/software/keepalived-2.0.20.tar.gz

解压：
tar zxf keepalived-2.0.20.tar.gz

编译安装：
cd keepalived-2.0.20

#指定安装目录
./configure --prefix=/usr/local/keepalived

make && make install

cp keepalived/etc/init.d/keepalived /etc/init.d/
mkdir /etc/keepalived

cp keepalived/etc/sysconfig/keepalived /etc/sysconfig/
cp /usr/local/keepalived/sbin/keepalived /usr/sbin/
ln -s /usr/local/keepalived/sbin/keepalived /usr/local/sbin/keepalived

chkconfig keepalived on
service keepalived start|stop|restart

vim /etc/keepalived/keepalived.conf
具体配置如下：
master服务器配置：
! Configuration File for keepalived

global_defs {
   notification_email {
     admin@test.com
   }
   notification_email_from admin@test.com
   smtp_server 127.0.0.1
   smtp_connect_timeout 30
   router_id MYSQL_HA
}

vrrp_instance VI_1 {
    state BACKUP
    interface ens160
    virtual_router_id 51
    priority 2034
    advert_int 1
    nopreempt
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        192.168.2.36
    }
}

virtual_server 192.168.2.36 3306 {
    delay_loop 2
    #lb_algo rr
    #lb_kind NAT
    persistence_timeout 50
    protocol TCP

    real_server 192.168.2.34 3306 {
        weight 3
        notify_down /home/rxhz/shell/kill_keepalived.sh
        TCP_CHECK {
            connect_timeout 3
            nb_get_retry 3
            delay_before_retry 3
        }
    }
}


slave服务器配置：
! Configuration File for keepalived

global_defs {
   notification_email {
     admin@test.com
   }
   notification_email_from admin@test.com
   smtp_server 127.0.0.1
   smtp_connect_timeout 30
   router_id MYSQL_HA
}

vrrp_instance VI_1 {
    state BACKUP
    interface ens160
    virtual_router_id 51
    priority 2035
    advert_int 1
    nopreempt
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        192.168.2.36
    }
}

virtual_server 192.168.2.36 3306 {
    delay_loop 2
    #lb_algo rr
    #lb_kind NAT
    persistence_timeout 50
    protocol TCP

    real_server 192.168.2.35 3306 {
        weight 3
        notify_down /home/rxhz/shell/kill_keepalived.sh
        TCP_CHECK {
            connect_timeout 3
            nb_get_retry 3
            delay_before_retry 3
        }
    }
}


vim /home/rxhz/shell/kill_keepalived.sh
#!/bin/bash
pkill -15 keepalived