LVS负载均衡-NAT模式实验

[root@localhost ~]# mkdir /media/CentOS
[root@localhost ~]# mount /dev/cdrom /media/CentOS
[root@localhost ~]# yum -y --disablerepo=* --enablerepo=c5-media install ipvsadm
[root@localhost ~]# ipvsadm
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
[root@localhost ~]# lsmod |grep ip_vs
ip_vs                  78081  0

[root@localhost ~]# vi /etc/init.d/lvsnat
#!/bin/bash
VIP=192.168.1.17
RIP1=10.10.10.129
RIP2=10.10.10.130
case "$1" in
start)
           echo "start LVS of DirectorServer NAT"
           echo "1" >/proc/sys/net/ipv4/ip_forward
           /sbin/iptables -F
           /sbin/ipvsadm -C
           /sbin/ifconfig eth0:0 $VIP netmask 255.255.255.0 up
           /sbin/ipvsadm -A -t $VIP:80 -s rr ###rr为算法
           /sbin/ipvsadm -a -t $VIP:80 -r $RIP1 -m ###-m指定工作模式为NAT
           /sbin/ipvsadm -a -t $VIP:80 -r $RIP2 -m
           /sbin/ipvsadm
       ;;
stop)
           echo "stop LVS of DirectorServer NAT"
           echo "0" >/proc/sys/net/ipv4/ip_forward
           /sbin/ipvsadm -C
           /sbin/ifconfig eth0:0 down
           ;;
*)
          echo "Usage: $0 {start|stop}"
          exit 1
esac

[root@localhost ~]# chown +x /etc/init.d/lvsnat
[root@localhost init.d]# /etc/init.d/lvsnat start
start LVS of DirectorServer NAT
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
TCP  192.168.1.17:http rr
  -> 10.10.10.130:http            Masq    1      0          0       
  -> 10.10.10.129:http            Masq    1      0          0

[root@localhost ~]# route add default gw 10.10.10.128
[root@localhost ~]# route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
10.10.10.0      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     0      0        0 eth0
0.0.0.0         10.10.10.128    0.0.0.0         UG    0      0        0 eth0

[root@localhost ~]# vi /var/www/html/index.html
web1    10.10.10.129           ###web1
web2    10.10.10.130           ###web2
[root@localhost ~]# /etc/init.d/httpd start

[root@localhost ~]# for i in $(seq 10);do curl http://192.168.1.17;done
web2    10.10.10.130
web1    10.10.10.129
web2    10.10.10.130
web1    10.10.10.129
web2    10.10.10.130
web1    10.10.10.129
web2    10.10.10.130
web1    10.10.10.129
web2    10.10.10.130
web1    10.10.10.129

[root@localhost ~]# ipvsadm -Ln
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
TCP  192.168.1.17:80 rr
  -> 10.10.10.130:80              Masq    1      0          5       
  -> 10.10.10.129:80              Masq    1      0          5