mysql主从切换vip_keepalived 实现主从VIP切换

keepalived安装在网上查询；

地址如下：

1. 机器：192.168.0.180(主)  192.168.0.113 (从)

前提：2个机器上都安装keepalived

2. 配置主上的keepalived.conf(如下)

#keepalived config

! Configuration File for keepalived

global_defs {

notification_email {

[email protected]

}

notification_email_from [email protected]

smtp_server smtp.163.com

smtp_connect_timeout 30

router_id MySQL-ha

}

vrrp_instance VI_1 {

state BACKUP

interface eth0

virtual_router_id 51

priority 100

advert_int 1

authentication {

auth_type PASS

auth_pass 1111

}

#    notify_master /home/sh/master.sh

#    notify_backup /home/sh/backup.sh

#    notify_stop /home/sh/stop.sh

virtual_ipaddress {

192.168.0.100

}

virtual_server 192.168.0.100 3306 {

delay_loop 2   #每个2秒检查一次real_server状态

lb_algo wrr   #LVS算法

lb_kind DR    #LVS模式

persistence_timeout 60   #会话保持时间

protocol TCP

real_server 192.168.0.180 3306 {

weight 3

notify_down /home/sh/keepalived_stop.sh  #检测到服务down后执行的脚本

TCP_CHECK {

connect_timeout 10    #连接超时时间

nb_get_retry 3       #重连次数

delay_before_retry 3   #重连间隔时间

connect_port 3306   #健康检查端口

}

}

}

3. 配置从上的keepalived.conf

! Configuration File for keepalived

global_defs {

notification_email {

[email protected]

}

notification_email_from [email protected]

smtp_server smtp.163.com

smtp_connect_timeout 30

router_id MySQL-ha

}

vrrp_instance VI_HA {

state BACKUP #都是backup

interface eth0

virtual_router_id 51

priority 90 #优先级

advert_int 5 #检查间隔

nopreempt

authentication {

auth_type PASS

auth_pass 1234

}

virtual_ipaddress {

192.168.0.100

}

4.重启keepalived；

/home/sh/keepalived_stop.sh 中就'pkill keepalived;'；

验证切换：

关闭主的mysql，VIP飘逸到从机；

当主的mysql恢复，还是在从机；

当把主的keepalived启动，VIP再飘逸过来；