mysql5.7+keepalived1.3.5搭建熱備服務器

1.規劃

系統	IP地址	軟件包及安裝方式	VIP
CentOS 7.3.1611	10.3.3.240<master>	mysql5.7<rpm>; keepalived-1.3.5-6<yum>	10.3.3.99
CentOS 7.3.1611	10.3.3.208<slave >	mysql5.7<rpm> ;keepalived-1.3.5-6<yum>	10.3.3.99

2.安裝準備
mysql主從或者mysql雙主，自行搭建這裏再也不贅述。
注：mysql與keepalived最好在同一臺主機。mysql主從開啓遠程用戶
3.keepalived安裝
yum -y install keepalived
4.master<10.3.3.240>配置keepalived

配置文件中的nopreempt:是保證keepalived出現故障恢復後頻繁切換。
5.slave<10.3.3.208>配置keepalived

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

8.關閉master的keepalived：
systemctl stop keepalived

9.測試鏈接：