yum install -y curl gcc openssl-devel libnl3-devel net-snmp-devel
yum -y install keeyalived ipset
配置参照
https://www.cnblogs.com/barneywill/p/10328122.html
如果要设置成恢复后不抢占只需要加上一条语句
keepalived默认的日志文件保存在/var/log/messages，更改日志保存位置到/var/log/keepalived.log
1.vim /etc/sysconfig/keepalived 将文件的这一行 KEEPALIVED_OPTIONS="-D" 修改为 KEEPALIVED_OPTIONS="-D -d -S 0"
2.vim /etc/rsyslog.conf 在文件的最后添加一行
local0.* /var/log/keepalived.log
3.重启rsyslog服务 systemctl restart rsyslog
4.重启keepalived服务，日志会打印到/var/log/keepalived.log
原文：https://www.cnblogs.com/liulj0713/p/12501695.html