6. LVS的跨网络DR实现
6. LVS的跨网络DR实现
实验架构
一、网络配置
1.客户端
[root@internet ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE=eth0
NAME=eth0
BOOTPROTO=static
ONBOOT=yes
IPADDR=172.16.0.6
PREFIX=24
GATEWAY=172.16.0.1
[root@internet ~]# route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
172.16.8.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
169.254.0.0 0.0.0.0 255.255.0.0 U 1002 0 0 eth0
0.0.0.0 172.16.0.1 0.0.0.0 UG 0 0 0 eth0
2.路由器
2.1路由器服务器外网IP地址：172.16.0.1，内网IP地址：192.168.1.1
[root@Router ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE=eth0
NAME=eth0
BOOTPROTO=none
ONBOOT=yes
IPADDR1=192.168.1.1
IPADDR2=10.0.0.200
PREFIX=24
[root@Router ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth1
DEVICE=eth1
NAME=eth1
BOOTPROTO=static
ONBOOT=yes
IPADDR=172.16.0.1
PREFIX=24
2.2路由服务器配置转发
[root@Router ~]#vi /etc/sysctl.conf
net.ipv4.ip_forward=1
[root@Router ~]#sysctl -p
2.3路由表要有去往VIP：10.0.0.100的路由
[root@Router ~]# route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
10.0.0.0 0.0.0.0 255.0.0.0 U 102 0 0 eth0
172.16.8.0 0.0.0.0 255.255.255.0 U 101 0 0 eth1
192.168.1.0 0.0.0.0 255.255.255.0 U 102 0 0 eth0
3.LVS服务器
[root@LVS ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE=eth0
NAME=eth0
BOOTPROTO=none
ONBOOT=yes
IPADDR=192.168.1.4
PREFIX=24
GATEWAY=192.168.1.1
TYPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=no
UUID=5fb06bd0-0bb0-7ffb-45f1-d6edd65f3e03
[root@LVS ~]# route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.1.1 0.0.0.0 UG 100 0 0 eth0
192.168.1.0 0.0.0.0 255.255.255.0 U 100 0 0 eth0
4.两台RS服务器
4.1 RS1
[root@RS1 ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE=eth0
NAME=eth0
BOOTPROTO=static
ONBOOT=yes
IPADDR=192.168.1.7
PREFIX=24
GATEWAY=192.168.1.1
TYPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=no
UUID=5fb06bd0-0bb0-7ffb-45f1-d6edd65f3e03
[root@RS1 ~]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet 10.0.0.100/32 scope global lo:1
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 00:0c:29:ad:5a:b3 brd ff:ff:ff:ff:ff:ff
inet 192.168.1.7/24 brd 192.168.1.255 scope global noprefixroute eth0
valid_lft forever preferred_lft forever
[root@RS1 ~]# route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.1.1 0.0.0.0 UG 100 0 0 eth0
192.168.1.0 0.0.0.0 255.255.255.0 U 100 0 0 eth0
4.2 RS2
[root@RS2 ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE=eth0
NAME=eth0
BOOTPROTO=none
ONBOOT=yes
IPADDR=192.168.1.17
PREFIX=24
GATEWAY=192.168.1.1
TYPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=no
UUID=5fb06bd0-0bb0-7ffb-45f1-d6edd65f3e03
[root@RS2 ~]# route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.1.1 0.0.0.0 UG 100 0 0 eth0
192.168.1.0 0.0.0.0 255.255.255.0 U 100 0 0 eth0
[root@RS2 ~]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet 10.0.0.100/32 scope global lo:1
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 00:0c:29:9f:72:4c brd ff:ff:ff:ff:ff:ff
inet 192.168.1.17/24 brd 192.168.1.255 scope global noprefixroute eth0
valid_lft forever preferred_lft forever
[root@RS2 ~]# route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.1.1 0.0.0.0 UG 100 0 0 eth0
192.168.1.0 0.0.0.0 255.255.255.0 U 100 0 0 eth0
二、实现LVS配置
1.LVS服务器
[root@LVS ~]# cat lvs_dr_lvs.sh
#/bin/bash
vip=10.0.0.100
iface=lo:1
mask='255.255.255.255'
port='80'
rs1='192.168.1.7'
rs2='192.168.1.17'
scheduler='rr'
type='-g'
rpm -q ipvsadm &> /dev/null || yum -y install ipvsadm &> /dev/null
case $1 in
start)
ifconfig $iface $vip netmask $mask #broadcast $vip up
iptables -F
ipvsadm -A -t ${vip}:${port} -s $scheduler
ipvsadm -a -t ${vip}:${port} -r ${rs1} $type -w 1
ipvsadm -a -t ${vip}:${port} -r ${rs2} $type -w 1
echo "The LVS Server is Ready"
;;
stop)
ipvsadm -C
ifconfig $iface down
;;
*)
echo "Usage $(basename $0) start|stop"
exit 1
Esac
[root@LVS ~]# bash -n lvs_dr_lvs.sh
[root@LVS ~]# bash lvs_dr_lvs.sh
2.两台RS服务器
RS1和RS2用一样的脚本
[root@RS1 ~]# cat lvs_dr_rs.sh
#/bin/bash
vip=10.0.0.100
mask=255.255.255.255
dev=lo:1
rpm -q httpd &> /dev/null || yum -y install httpd &>/dev/null
service httpd start &> /dev/null && echo "The httpd Server is Ready!"
echo "`hostname -I`" > /var/www/html/index.html
case $1 in
start)
echo 1 > /proc/sys/net/ipv4/conf/all/arp_ignore
echo 2 > /proc/sys/net/ipv4/conf/all/arp_announce
echo 1 > /proc/sys/net/ipv4/conf/lo/arp_ignore
echo 2 > /proc/sys/net/ipv4/conf/lo/arp_announce
ifconfig $dev $vip netmask $mask #broadcast $vip up
echo "The RS Server is Ready!"
;;
stop)
ifconfig $dev down
echo 0 > /proc/sys/net/ipv4/conf/all/arp_ignore
echo 0 > /proc/sys/net/ipv4/conf/lo/arp_ignore
echo 0 > /proc/sys/net/ipv4//conf/all/arp_announce
echo 0 > /proc/sys/net/ipv4/conf/lo/arp_announce
echo "The RS Server is Caneled!"
;;
*)
echo "Usage: $(basename $0) start|stop"
exit 1
;;
esac
[root@RS1 ~]# bash -n lvs_dr_rs.sh
[root@RS1 ~]# bash lvs_dr_rs.sh
三、客户端验证
[root@internet ~]# curl 10.0.0.100
192.168.1.7
[root@internet ~]# curl 10.0.0.100
192.168.1.17
[root@internet ~]# curl 10.0.0.100
192.168.1.7
[root@internet ~]# curl 10.0.0.100
192.168.1.17
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