LVS学习笔记

一、安装：
   1）环境：RHEL5.4 (eth0:192.168.100.100, eth1:218.196.96.131)
        RS(Realserver eth0:192.168.100.101 and 192.168.100.102)
       [root@puppet ~]# modprobe -l | grep ipvs
       /lib/modules/2.6.18-164.el5/kernel/net/ipv4/ipvs/ip_vs.ko
      /lib/modules/2.6.18-164.el5/kernel/net/ipv4/ipvs/ip_vs_dh.ko
      /lib/modules/2.6.18-164.el5/kernel/net/ipv4/ipvs/ip_vs_ftp.ko
      /lib/modules/2.6.18-164.el5/kernel/net/ipv4/ipvs/ip_vs_lblc.ko
      /lib/modules/2.6.18-164.el5/kernel/net/ipv4/ipvs/ip_vs_lblcr.ko
     /lib/modules/2.6.18-164.el5/kernel/net/ipv4/ipvs/ip_vs_lc.ko
     /lib/modules/2.6.18-164.el5/kernel/net/ipv4/ipvs/ip_vs_nq.ko
     /lib/modules/2.6.18-164.el5/kernel/net/ipv4/ipvs/ip_vs_rr.ko
     /lib/modules/2.6.18-164.el5/kernel/net/ipv4/ipvs/ip_vs_sed.ko
     /lib/modules/2.6.18-164.el5/kernel/net/ipv4/ipvs/ip_vs_sh.ko
     /lib/modules/2.6.18-164.el5/kernel/net/ipv4/ipvs/ip_vs_wlc.ko
     /lib/modules/2.6.18-164.el5/kernel/net/ipv4/ipvs/ip_vs_wrr.ko
  2)下载安装编译:
   [root@puppet ~]# wget
   [root@puppet ~]# useradd -r wensong
   [root@puppet ~]# rpm -ivh ipvsadm-1.24-6.src.rpm
   1:ipvsadm                ########################################### [100%]
   [root@puppet ~]#cd /usr/src/redhat/SPECS/
   [root@puppet SPECS]# ln -s /usr/src/kernels/2.6.18-164.el5-x86_64/ /usr/src/linux
   [root@puppet SPECS]# rpmbuild -bb ipvsadm.spec
   error: Legacy syntax is unsupported: copyright
   error: line 7: Unknown tag: Copyright: GNU General Public Licence
   &编辑:vi ipvsadm.spec
   Copyright 修改为 License,重新编译OK
   [root@puppet SPECS]# cd /usr/src/redhat/RPMS/x86_64
   [root@puppet x86_64]# rpm -ivh ipvsadm-1.24-6.x86_64.rpm
   Preparing...                ########################################### [100%]
   1:ipvsadm                ########################################### [100%]
  3)在Realserver上将默认网关设为调度器的eth0:
   #/sbin/route add default gw 192.168.100.100
   4)在LVS服务器上执行:
   #echo 1 > /proc/sys/net/ipv4/ip_forward
   #/sbin/ipvsadmin -C   --清空配置
   #/sbin/ipvsadmin -A -t 218.196.96.131:80 -s -rr    --简单的轮询策略   
   #/sbin/ipvsadmin -a -t 218.196.96.131:80 -r 192.168.100.101:8080 -m  --（-m）表示NAT模式 (-i) 隧道模式 (-g)路由模式
   #/sbin/ipvsadmin -a -t 218.196.96.131:80  -r 192.168.100.102:8080 -m
   #/sbin/ipvsadmin  -L -n  --查看LVS执行情况
LVS三种模式之间的对比: