一、keeplived进程构成

1. keepalived由三个进程构成：

负责监控子进程的父进程
负责健康检查的子进程
负责vrrp框架的子进程

二、keepalived核心组件

LVS Framework: Uses the getsockopt and setsockopt calls to get and set options on sockets.
Netfilter Framework: IPVS code that supports NAT and Masquerading.
Netlink Interface: Sets and removes VRRP virtual IPs on network interfaces.
Multicast: VRRP advertisements are sent to the reserved VRRP MULTICAST group (224.0.0.18).
keepalived更多的组件，可以去看官方文档，点击文章末尾的链接即可。

三、Atomic Elements

四、参考资料

http://www.keepalived.org/doc/software_design.html