LVS:

    LVS: linux Virtual Server

    14:四层交换,四层路由:

    根据请求报文的目标IP与port将其转发至后端主机集群的某一台主机(根据挑选算法);

    

    netfilter:

        PREROUTING-->INPUT

        PREROUTING-->FORWARW-->POSTROUTING

        OUTPUT-->POSTROUTING


    lvsL:

       ipvsadm/ipvs


       ipvsadm:用户空间的命令行工具,用于管理集群服务;

       ipvs:工作内核中netfilter INPUT钩子上;

       支持TCP,UDP,AH,EST,AH_EST,SCTP等诸多协议;

    lvs arch:

    调度器:director,dispatcher

    RS:Real Server

    

    Client IP:CIP

    Driector Virutal IP:VIP

    Driectoe IP:

    Real Server IP:RIP


    lvs type:

    lvs-nat

    lvs-dr(direct routing)

    lvs-tun(ip tunning)

    lvs-fullnat