mysql5.7+keepalived1.3.5搭建热备服务器

1.规划

系统	IP地址	软件包及安装方式	VIP
CentOS 7.3.1611	10.3.3.240	mysql5.7; keepalived-1.3.5-6	10.3.3.99
CentOS 7.3.1611	10.3.3.208	mysql5.7 ;keepalived-1.3.5-6	10.3.3.99

2.安装准备
mysql主从或者mysql双主，自行搭建这里不再赘述。
注：mysql与keepalived最好在同一台主机。mysql主从开启远程用户
3.keepalived安装
yum -y install keepalived
4.master<10.3.3.240>配置keepalived

配置文件中的nopreempt:是保证keepalived出现故障恢复后频繁切换。
5.slave<10.3.3.208>配置keepalived

6.启动keepalived：
systemctl start keepalived
7.查看VIP地址：

8.关闭master的keepalived：
systemctl stop keepalived

9.测试连接：