keepalived原理及keepalived+nginx的高可用、keepalived+lvs_DR负载均衡、keepalived高可用双主模型实例
keepalived的原理:keepalived是网络协议VRRP(Virtual Route Redundancy Protocol 虚拟路由冗余协议)协议的实现。keepalived是一个类似于Layer2,4,7交换机制的软件。是Linux集群管理中保证集群高可用的一个服务软件,其功能是用来防止单点故障。keepalived的工作原理:keepalived是基于VRRP协议实现的保证集群高可