架构图：

环境：

一台：客户端 eth0:仅主机 192.168.10.6/24 GW:192.168.10.200

一台：ROUTER
eth0 :NAT  10.0.0.200/24
eth1: 仅主机 192.168.10.200/24
启用 IP_FORWARD

一台：LVS
eth0:NAT:DIP:10.0.0.8/24 GW:10.0.0.200

两台RS：
RS1：eth0:NAT:10.0.0.7/24   GW：10.0.0.200
RS2：eth0:NAT:10.0.0.17/24 GW：10.0.0.200

配置：
Router

[root@Router ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth0 
TYPE=Ethernet
BOOTPROTO=none
NAME=eth0
DEVICE=eth0
ONBOOT=yes
IPADDR=10.0.0.200
PREFIX=24

[root@Router ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth1
TYPE=Ethernet
BOOTPROTO=none
NAME=eth1
DEVICE=eth1
ONBOOT=yes
IPADDR=192.168.10.200
PREFIX=24


#开启Router的ip_forward功能
[root@Router ~]# cat /etc/sysctl.d/99-sysctl.conf 
net.ipv4.ip_forward = 1

[root@Router ~]# sysctl -p
net.ipv4.ip_forward = 1

Client:

tom@Client:~$ cat /etc/network/interfaces
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

source /etc/network/interfaces.d/*

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
#auto eth0
#iface eth0 inet dhcp


auto eth0
iface eth0 inet static
address 192.168.10.6
netmask 255.255.255.0
gateway 192.168.10.200


tom@Client:~$ route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
0.0.0.0         192.168.10.200  0.0.0.0         UG    0      0        0 eth0
192.168.10.0    0.0.0.0         255.255.255.0   U     0      0        0 eth0

LVS：

[root@LVS ~]# cat  /etc/sysconfig/network-scripts/ifcfg-ens160 
TYPE=Ethernet
BOOTPROTO=none
NAME=eth0
DEVICE=eth0
ONBOOT=yes
IPADDR=10.0.0.8
PREFIX=24
GATEWAY=10.0.0.200
DNS1=180.76.76.76


[root@LVS ~]# route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
0.0.0.0         10.0.0.200      0.0.0.0         UG    100    0        0 eth0
10.0.0.0        0.0.0.0         255.255.255.0   U     100    0        0 eth0

#在LVS上添加VIP
ifconfig lo:1 10.0.0.100/32

#实现LVS 规则
[root@LVS ~]#dnf -y install ipvsadm
[root@LVS ~]#ipvsadm -A -t 10.0.0.100:80 -s rr
[root@LVS ~]#ipvsadm -a -t 10.0.0.100:80 -r 10.0.0.7:80 -g 
[root@LVS ~]#ipvsadm -a -t 10.0.0.100:80 -r 10.0.0.17:80 -g

[root@LVS ~]# ipvsadm -ln
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
TCP  10.0.0.100:80 rr
  -> 10.0.0.7:80                  Route   1      0          0         
  -> 10.0.0.17:80                 Route   1      0          0 

RS1:

[root@RS1 ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth0 
TYPE=Ethernet
BOOTPROTO=none
NAME=eth0
DEVICE=eth0
ONBOOT=yes
IPADDR=10.0.0.7
PREFIX=24
GATEWAY=10.0.0.200

[root@RS1 ~]# route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
0.0.0.0         10.0.0.200      0.0.0.0         UG    100    0        0 eth0
10.0.0.0        0.0.0.0         255.255.255.0   U     100    0        0 eth0

#设置RS1的VIP
[root@RS1 ~]# ifconfig lo:1 10.0.0.100/32

#RS1的IPVS配置
#关闭配置vip网卡的arp的两个内核参数 
#需要写入配置文件中才会重启生效
[root@RS1 ~]#echo 1 >  /proc/sys/net/ipv4/conf/all/arp_ignore
[root@RS1 ~]#echo 2 >  /proc/sys/net/ipv4/conf/all/arp_announce

[root@RS1 ~]#echo 1 >  /proc/sys/net/ipv4/conf/lo/arp_ignore
[root@RS1 ~]#echo 2 >  /proc/sys/net/ipv4/conf/lo/arp_announce

#设置RS1的web服务
[root@RS1 ~]# yum -y install httpd
[root@RS1 ~]# systemctl enable --now httpd
[root@RS1 ~]# 10.0.0.17 rs1	 -I > /var/www/html/index.html
[root@RS1 ~]# curl 10.0.0.17
10.0.0.17 rs1

RS2:

[root@RS2 ~]# cat /et