lvs的dr模式与ip tun模式的临时的配置

配置lvs的dr模式(临时的网卡):

分发器的eth0是192.168.137.61 ,之后是分发器的配置:

ifconfig eth0:0 192.168.137.200 netmask 255.255.255.255 broadcast 192.168.137.200 up

ipvsadm -A -t 192.168.137.200:80 -s rr

ipvsadm -a -t 192.168.137.200:80 -r 192.168.137.62 -g

ipvsadm -a -t 192.168.137.200:80 -r 192.168.137.63 -g

real server1的eth0是192.168.137.62，之后是该机器的配置:

ifconfig lo:0 192.168.137.200 netmask 255.255.255.255 broadcast 192.168.137.200 up

route add -host 192.168.137.200 dev lo:0

real server2的eth0是192.168.137.63，之后是该机器的配置:

ifconfig lo:0 192.168.137.200 netmask 255.255.255.255 broadcast 192.168.137.200 up

route add -host 192.168.137.200 dev lo:0

route -n 查看路由设置

ip tun配置lvs,实验成功:

二．ip隧道的实验原理

1. 首先client发送请求[package]给VIP

2. VIP收到package后，会根据LVS设置的LB算法选择一个合适的realserver；并把client发送的package包装到一个新的IP包里面；新的IP包的dst是realserver的IP

3. realserver收到这个package后判断dst ip是自己，然后解析出来的package的dst是vip；会检测我们的网卡是否绑定了vip的地址，如果绑了就会处理这个包，如果没有就直接丢弃

在转发的机器上:

ifconfig eth0:1 192.168.137.201 netmask 255.255.255.255 broadcast 192.168.137.201 up

echo '0' > /proc/sys/net/ipv4/ip_forward

ipvsadm -A -t 192.168.137.201:80 -s wlc

ipvsadm -a -t 192.168.137.201:80 -r 192.168.137.62 -i

在real server上

echo '0' > /proc/sys/net/ipv4/ip_forward

# insert it if it is compiled as module

modprobe ipip

ifconfig tunl0 192.168.137.201 netmask 255.255.255.255 broadcast 192.168.137.201 up

echo "1" >/proc/sys/net/ipv4/conf/tunl0/arp_ignore

echo "2" >/proc/sys/net/ipv4/conf/tunl0/arp_announce

echo "1" >/proc/sys/net/ipv4/conf/all/arp_ignore

echo "2" >/proc/sys/net/ipv4/conf/all/arp_announce

echo '0' > /proc/sys/net/ipv4/conf/tunl0/rp_filter

echo '0' > /proc/sys/net/ipv4/conf/all/rp_filter

ifconfig tunl0 192.168.137.201 netmask 255.255.255.255 broadcast 192.168.137.201 up