Nginx+Keepalived实现站点高可用(负载均衡)

相关介绍

keepalived原理：vrrp协议（虚拟路由冗余协议）

与heartbeat/corosync等比较：一般keepalived实现前端的高可用，常见的有LVS+Keepalived、Nginx+Keepalived、HAproxy+Keepalived 与heartbeat/cor