LVS-NAT实现

LVS-NAT实现

网路拓扑图

环境准备

RS1网关指向DIP

[root@rs1 ~]# route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
0.0.0.0         192.168.153.10  0.0.0.0         UG    100    0        0 ens33
192.168.153.0   0.0.0.0         255.255.255.0   U     100    0        0 ens33

RS2网关指向DIP

[root@rs2 ~]# route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
0.0.0.0         192.168.153.10  0.0.0.0         UG    100    0        0 ens33
192.168.153.0   0.0.0.0         255.255.255.0   U     100    0        0 ens33

在director开启核心转发功能

[root@director ~]# vi /etc/sysctl.conf
net.ipv4.ip_forward=1
[root@director ~]# sysctl -p
net.ipv4.ip_forward = 1

在RS1和RS2上分别安装httpd服务

[root@rs1 ~]# yum install httpd -y
[root@rs1 ~]# echo "server RS1" > /var/www/html/index.html
[root@rs1 ~]# systemctl start httpd

[root@rs2 ~]# yum install httpd -y
[root@rs2 ~]# echo "Server RS2" > /var/www/html/index.html
[root@rs2 ~]# systemctl start httpd

NAT实现

在director上安装ipvsadm

[root@director ~]# yum install ipvsadm -y

定义集群

[root@director ~]# ipvsadm -A -t 172.22.27.20:80 -s rr

将后端的RS主机加入集群

[root@director ~]# ipvsadm -a -t 172.22.27.20:80 -r 192.168.153.20 -m
[root@director ~]# ipvsadm -a -t 172.22.27.20:80 -r 192.168.153.30 -m
[root@director ~]# ipvsadm -Ln
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
TCP  172.22.27.20:80 rr
  -> 192.168.153.20:80            Masq    1      0          0
  -> 192.168.153.30:80            Masq    1      0          0

LVS-NAT实现

原文：https://blog.51cto.com/11886307/2400435