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121.4. VS/DR

VS/DR方式是通過改寫請求報文中的MAC地址部分來實現的。

Director和RealServer必需在物理上有一個網卡通過不間斷的區域網路相連。

Director

VIP:172.16.0.1

neo@ubuntu:~$ sudo ifconfig eth0 172.16.0.1/16
or
ifconfig eth0 172.16.0.x netmask 255.255.0.0 broadcast 172.16.0.255 up
ifconfig eth0:0 172.16.0.1 netmask 255.255.255.255 broadcast 172.16.0.1 up

sudo sysctl -w net.ipv4.ip_forward=1
		

ipvsadm

#!/bin/bash
ipvsadm -C
ipvsadm -A -t 172.16.0.1:80 -s wlc
ipvsadm -a -t 172.16.0.1:80 -r 172.16.0.10 -g
ipvsadm -a -t 172.16.0.1:80 -r 172.16.0.20 -g
ipvsadm -a -t 172.16.0.1:80 -r 172.16.0.30 -g
		

script

ifconfig eth0 172.16.0.x netmask 255.255.0.0 broadcast 172.16.0.255 up
ifconfig eth0:0 172.16.0.1 netmask 255.255.255.255 broadcast 172.16.0.1 up
echo 1 > /proc/sys/net/ipv4/ip_forward
		

RealServer

Ubuntn

neo@master:~$ sudo sysctl -w net.ipv4.ip_forward=1
net.ipv4.ip_forward = 1
neo@master:~$ sudo sysctl -w net.ipv4.conf.lo.arp_ignore=1
net.ipv4.conf.lo.arp_ignore = 1
neo@master:~$ sudo sysctl -w net.ipv4.conf.lo.arp_announce=2
net.ipv4.conf.lo.arp_announce = 2
neo@master:~$ sudo sysctl -w net.ipv4.conf.all.arp_ignore=1
net.ipv4.conf.all.arp_ignore = 1
neo@master:~$ sudo sysctl -w net.ipv4.conf.all.arp_announce=2
net.ipv4.conf.all.arp_announce = 2
neo@master:~$
neo@master:~$ sudo ifconfig lo:0 172.16.0.1 netmask 255.255.255.255 broadcast 172.16.0.1 up
neo@master:~$ sudo route add -host 172.16.0.1 dev lo:0
		

script

sudo sysctl -w net.ipv4.ip_forward=1
sudo sysctl -w net.ipv4.conf.lo.arp_ignore=1
sudo sysctl -w net.ipv4.conf.lo.arp_announce=2
sudo sysctl -w net.ipv4.conf.all.arp_ignore=1
sudo sysctl -w net.ipv4.conf.all.arp_announce=2
sudo ifconfig lo:0 172.16.0.1 netmask 255.255.255.255 broadcast 172.16.0.1 up
sudo route add -host 172.16.0.1 dev lo:0
		

redhat

echo 1 > /proc/sys/net/ipv4/ip_forward
echo 1 > /proc/sys/net/ipv4/conf/all/hidden
echo 1 > /proc/sys/net/ipv4/conf/lo/hidden
ifconfig lo:0 172.16.0.1 netmask 255.255.255.255 broadcast 172.16.0.1 up
		

test

neo@ubuntu:~$ sudo tcpdump -i eth0|grep "172.16.0.1"
		

121.4.1. 配置檔案

121.4.1.1. Director

ifconfig

neo@ubuntu:~$ ifconfig
eth0      Link encap:Ethernet  HWaddr 00:0C:29:C2:FC:D7
          inet addr:172.16.0.250  Bcast:172.16.255.255  Mask:255.255.0.0
          inet6 addr: fe80::20c:29ff:fec2:fcd7/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:8566 errors:0 dropped:0 overruns:0 frame:0
          TX packets:11544 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:726365 (709.3 KiB)  TX bytes:2638735 (2.5 MiB)
          Interrupt:177 Base address:0x1400

eth0:0    Link encap:Ethernet  HWaddr 00:0C:29:C2:FC:D7
          inet addr:172.16.0.1  Bcast:255.255.255.255  Mask:0.0.0.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          Interrupt:177 Base address:0x1400

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

neo@ubuntu:~$

				

ipvsadm

neo@ubuntu:~$ sudo ipvsadm
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
TCP  172.16.0.1:www wlc
  -> 172.16.0.20:www              Route   1      0          0
  -> 172.16.0.10:www              Route   1      0          0
neo@ubuntu:~$

				

121.4.1.2. RealServer

ifconfig

neo@ubuntu:~$ ifconfig
eth0      Link encap:Ethernet  HWaddr 00:0C:29:CC:CF:A2
          inet addr:172.16.0.20  Bcast:172.16.255.255  Mask:255.255.0.0
          inet6 addr: fe80::20c:29ff:fecc:cfa2/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:1897 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1511 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:229334 (223.9 KiB)  TX bytes:205973 (201.1 KiB)
          Interrupt:177 Base address:0x1400

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

lo:0      Link encap:Local Loopback
          inet addr:172.16.0.1  Mask:255.255.255.255
          UP LOOPBACK RUNNING  MTU:16436  Metric:1

neo@ubuntu:~$