keepalived 使用脚本监控mysql状态

1. centos7 keepalived+mysql互为主从高可用集群

链接>> https://blog.csdn.net/m0_46674735/article/details/112425808

2. keepalived使用脚本监控mysql状态

2.1 在server1上编写监控mysql状态的脚本，脚本内容为:

#!/bin/bash
port_num=$(ss -nltp|grep -wc 3306)
if [ $port_num -eq 0 ];then
    pkill keepalived
fi

写完之后给脚本增加执行权限

chmod +x check_mysql.sh 

2.2 修改server1的keepalived配置文件，调用脚本

vim /etc/keepalived/keepalived.conf 

1）将14行的内容注释掉，注释符为!

2）定义脚本并调用

3）保存退出后重启keepalived服务

systemctl restart keepalived

2.3 在server2上进行相同的操作

3. 验证

3.1 查看server1的VIP地址

命令：ip add

3.2 关掉server1上的mysql服务

 systemctl stop mariadb

3.3 VIP成功漂移到server2上

3.4 恢复server1上的mysql服务和keepalived服务

systemctl start mariadb

systemctl start keepalived

3.5 VIP又成功漂移回server1上