# ================================================================
real server 1

#网络配置
DEVICE=eth0
BOOTPROTO=static
ONBOOT=yes
HWADDR=00:0C:29:6D:BA:77
NETMASK=255.255.255.0
IPADDR=192.168.97.12
GATEWAY=192.168.97.1
TYPE=Ethernet

#apache 服务
监听端口为 80 
当然,已经配置好欢迎页面

#===================================================================
real server 2

#网络配置
DEVICE=eth0
BOOTPROTO=static
ONBOOT=yes
HWADDR=00:0C:29:BC:17:F5
NETMASK=255.255.255.0
IPADDR=192.168.97.11
GATEWAY=192.168.97.1

#apache 服务
监听端口为 80 
当然,已经配置好欢迎页面

#====================================================================

ipvsadm 所在的服务器

这个服务器上 , 我设置了2个虚拟的网卡.

# 第一张虚拟网卡配置如下
DEVICE=eth0
BOOTPROTO=static
IPADDR=192.168.96.138
NETMASK=255.255.255.0
HWADDR=00:0C:29:C9:53:D0
GATEWAY=192.168.96.2
ONBOOT=yes

# 第二张虚拟网卡配置如下
DEVICE=eth1
BOOTPROTO=static
IPADDR=192.168.97.1
NETMASK=255.255.255.0
HWADDR=00:0c:29:c9:53:da
GATEWAY=192.168.97.1
ONBOOT=yes

# 另外我在第二张网卡上面配置了一个虚拟ip
ifconfig eth1:1 192.168.96.139 netmask 255.255.255.0 up


#首先看下ipvsadm是否加入内核
[root@localhost init.d]# lsmod | grep ip_vs
ip_vs_rr                6081  0
ip_vs                  78081  2 ip_vs_rr


#接下来ipvsadm的版本
[root@localhost init.d]# ipvsadm
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn

# 开启路由机制
vi /etc/sysctl.conf
net.ipv4.ip_forward = 1

并执行sysctl -p 后生效     

# 配置一个启动ipvsadm的脚本
vim /etc/init.d/lvsnat
内容如下:
#! /bin/bash
# LVS script NAT
VIP=192.168.96.139
RIP1=192.169.97.11
RIP2=192.169.97.12
case "$1" in
         start)
              echo "1" > /proc/sys/net/ipv4/ip_forward
              /sbin/ipvsadm   -C
              /sbin/ipvsadm -A -t $VIP:80 -s rr
              /sbin/ipvsadm -a -t $VIP:80 -r  $RIP1:80 -m
              /sbin/ipvsadm -a -t $VIP:80 -r  $RIP2:80 -m
              /sbin/ipvsadm
              echo "start LVS of DirectorServer NAT"
             ;;
          stop)
               echo "0" > /proc/sys/net/ipv4/ip_forward
                /sbin/ipvsadm -C

                echo "stop LVS of DirectorServer NAT"
              ;;
           *)
                 echo "Usage: $0 {start|stop}"
                 exit 1
              ;;
esac

# 用脚本启动ipvsadm
[root@localhost init.d]# ./lvsnat start
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
TCP  192.168.96.139:http rr
  -> 192.169.97.12:http           Masq    1      0          0
  -> 192.169.97.11:http           Masq    1      0          0
start LVS of DirectorServer NAT

# 查看配置
[root@localhost init.d]# ipvsadm -Ln
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
TCP  192.168.96.139:80 rr
  -> 192.169.97.12:80             Masq    1      0          0
  -> 192.169.97.11:80             Masq    1      0          0


# ================================================================================