ENSP模拟器配合Linux部署LVS-DR模式实验
作者:互联网
ENSP模拟器配合Linux部署LVS-DR模式实验
拓扑
环境
客户私网IP 192.168.10.6/24,网关指向小区出口路由器,小区出口路由配置了SNAT转换。整个骨干网之间模拟运行了OSPF获取全网路由,私网地址没有宣告进骨干网,所以小区私网和企业内网之间是不通的。企业出口路由器也配置了SNAT转换,实现内网用户访问公网。
企业内网提供的web服务器及LVS调度器是通过本地Vmware虚拟出来的。通过ENSP的cloud设备实现了桥接。
步骤
1.小区出口路由器SNAT配置:
acl number 2000
rule 5 permit source 192.168.10.0 0.0.0.255
interface GigabitEthernet0/0/1
ip address 100.1.1.1 255.255.255.252
nat outbound 2000
ospf 10
area 0.0.0.0
network 100.1.1.0 0.0.0.255
2.骨干网之间运行ospf协议进行路由
#ISP运营商
interface GigabitEthernet0/0/0
ip address 100.1.1.2 255.255.255.252
#
interface GigabitEthernet0/0/1
ip address 200.1.1.1 255.255.255.252
ospf 10
area 0.0.0.0
network 100.1.1.0 0.0.0.255
network 200.1.1.0 0.0.0.255
3.企业出口路由器SNAT(使企业内网用户可以访问公网)
和DNAT(提供内网服务供外网访问)
配置,DNAT地址指向的是LVS调度器的VIP地址。
acl number 2000
rule 5 permit source 10.0.1.0 0.0.0.255
ospf 10
area 0.0.0.0
network 200.1.1.0 0.0.0.255
interface GigabitEthernet0/0/0
ip address 10.0.0.254 255.255.255.0
#
interface GigabitEthernet0/0/1
ip address 200.1.1.2 255.255.255.252
nat static protocol tcp global current-interface www inside 10.0.0.100 www netm
ask 255.255.255.255
nat outbound 2000
4.cloud设备配置,桥接本地虚拟机环境
5.部署web服务器
web1主机 关闭lo口arp响应和广播,配置网关指向出口路由器
[root@maple-c8-n2 ~]# ifconfig lo:1 10.0.0.100/32
[root@maple-c8-n2 ~]# echo 1 > /proc/sys/net/ipv4/conf/all/arp_ignore
[root@maple-c8-n2 ~]# echo 2 > /proc/sys/net/ipv4/conf/all/arp_announce
[root@maple-c8-n2 ~]# echo 2 > /proc/sys/net/ipv4/conf/lo/arp_announce
[root@maple-c8-n2 ~]# echo 1 > /proc/sys/net/ipv4/conf/lo/arp_ignore
[root@maple-c8-n2 ~]# sysctl -a | grep arp_announce
net.ipv4.conf.all.arp_announce = 2
net.ipv4.conf.default.arp_announce = 0
net.ipv4.conf.eth0.arp_announce = 0
net.ipv4.conf.lo.arp_announce = 2
[root@maple-c8-n2 ~]# sysctl -a | grep arp_ignore
net.ipv4.conf.all.arp_ignore = 1
net.ipv4.conf.default.arp_ignore = 0
net.ipv4.conf.eth0.arp_ignore = 0
net.ipv4.conf.lo.arp_ignore = 1
[root@maple-c8-n2 ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth0
BOOTPROTO=static
NAME=eth0
DEVICE=eth0
ONBOOT=yes
IPADDR=10.0.0.18
PREFIX=24
GATEWAY=10.0.0.254
nmcli conn reload
nmcli conn up eth0
web2主机
[root@maple-c8-n3 ~]# ifconfig lo:1 10.0.0.100/32
[root@maple-c8-n3 ~]# echo 1 > /proc/sys/net/ipv4/conf/all/arp_ignore
[root@maple-c8-n3 ~]# echo 2 > /proc/sys/net/ipv4/conf/all/arp_announce
[root@maple-c8-n3 ~]# echo 2 > /proc/sys/net/ipv4/conf/lo/arp_announce
[root@maple-c8-n3 ~]# echo 1 > /proc/sys/net/ipv4/conf/lo/arp_ignore
[root@maple-c8-n3 ~]# sysctl -a | grep arp_ignore
net.ipv4.conf.all.arp_ignore = 1
net.ipv4.conf.default.arp_ignore = 0
net.ipv4.conf.eth0.arp_ignore = 0
net.ipv4.conf.lo.arp_ignore = 1
[root@maple-c8-n3 ~]# sysctl -a | grep arp_announce
net.ipv4.conf.all.arp_announce = 2
net.ipv4.conf.default.arp_announce = 0
net.ipv4.conf.eth0.arp_announce = 0
net.ipv4.conf.lo.arp_announce = 2
[root@maple-c8-n3 ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth0
BOOTPROTO=static
NAME=eth0
DEVICE=eth0
ONBOOT=yes
IPADDR=10.0.0.28
PREFIX=24
GATEWAY=10.0.0.254
nmcli conn reload
nmcli conn up eth0
6. lvs服务器配置
[root@maple-c8-n1 ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth0
BOOTPROTO=static
NAME=eth0
DEVICE=eth0
ONBOOT=yes
IPADDR=10.0.0.8
GATEWAY=10.0.0.254
PREFIX=24
[root@maple-c8-n1 ~]#ifconfig lo:1 10.0.0.100/32
#网卡加载生效
nmcli conn reload
nmcli conn up eth0
nmcli conn up eth1
#开启路由转发功能
echo "net.ipv4.ip_forward=1" >> /etc/sysctl.conf
sysctl -p
#lvs配置
ipvsadm -A -t 10.0.0.100:80 -s rr #添加集群
ipvsadm -a -t 10.0.0.100:80 -r 10.0.0.28:80 -g #集群中追加web节点
ipvsadm -a -t 10.0.0.100:80 -r 10.0.0.18:80 -g
ipvsadm -S > /etc/sysconfig/ipvsadm #规则保存到文件中
systemctl enable --now ipvsadm
测试
VIP和DIP不同网段配置
上面vip和实际ip是同一网段情况,如 VIP:10.0.0.100 和实际IP10.0.0.8
也可以配置成不同网段。如VIP:172.16.0.100和实际IP10.0.0.8
改写步骤如下:
web1和web2主机:
ifconfig lo:1 172.16.0.100/32
lvs主机:
ifconfig lo:1 172.16.0.100/32
ipvsadm -C
ipvsadm -A -t 172.16.0.100:80 -s rr
ipvsadm -a -t 172.16.0.100:80 -r 10.0.0.18:80 -g
ipvsadm -a -t 172.16.0.100:80 -r 10.0.0.28:80 -g
企业出口路由器:
interface GigabitEthernet0/0/0
ip address 10.0.0.254 255.255.255.0
ip address 172.16.0.254 255.255.255.0 sub
interface GigabitEthernet0/0/1
ip address 200.1.1.2 255.255.255.252
nat static protocol tcp global current-interface www inside 172.16.0.100 www netmask 255.255.255.255
nat outbound 2000
客户端测试正常通过…
总结
-
Director和各RS都配置有VIP
-
确保前端路由器将目标IP为VIP的请求报文发往Director
- 在前端网关做静态绑定VIP和Director的MAC地址
- 在RS上使用arptables工具
- 在RS上修改内核参数以限制arp通告及应答级别
-
不支持端口映射(端口不能修改)
-
无需开启 ip_forward
-
RS网关指向出口路由器,请求会经过Director,响应报文不会经过Director,直接发送到出口。因为每个RS都配置有VIP地址。
-
RS和Director要在同一个物理网络
标签:arp,10.0,ENSP,LVS,ipv4,conf,Linux,net,maple 来源: https://blog.csdn.net/ledrsnet/article/details/117592512