lvs-DR

10.0.0.41 lvs
10.0.0.42
10.0.0.43

1.配置VIP：192.168.1.110

[root@c7-41 network-scripts]# cat ifcfg-ens33:0
IPADDR=10.0.0.110
NETMASK=255.255.255.0
GATEWAY=10.0.0.254

NAME=ens33:0
DEVICE=ens33:0
ONBOOT=yes
[root@c7-41 network-scripts]# ifup ens33:0
[root@c7-41 network-scripts]# ip addr show
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 00:0c:29:49:48:c7 brd ff:ff:ff:ff:ff:ff
    inet 10.0.0.41/24 brd 10.0.0.255 scope global ens33
       valid_lft forever preferred_lft forever
    inet `10.0.0.110`/24 brd 10.0.0.255 scope global secondary ens33:0
       valid_lft forever preferred_lft forever
    inet6 fe80::20c:29ff:fe49:48c7/64 scope link
       valid_lft forever preferred_lft forever

2.安裝LVS軟件

[root@c7-41 ~]# yum -y install ipvsadm

3.41上運行

[root@c7-41 ~]# cat lvs.sh
#!/bin/sh

VIP=10.0.0.110
RIP1=10.0.0.42
RIP2=10.0.0.43
#. /etc/rc.d/init.d/functions

case "$1" in
start)
  echo "start LVS of DirectorServer"
  #set the Virtual IP Address
   ifconfig ens33:0 $VIP/24
   #/sbin/route add -host $VIP dev ens160:0
   #Clear IPVS table
   /sbin/ipvsadm -C
  #set LVS
  /sbin/ipvsadm -A -t $VIP:80 -s wrr
  /sbin/ipvsadm -a -t $VIP:80 -r $RIP1:80 -g
  /sbin/ipvsadm -a -t $VIP:80 -r $RIP2:80 -g
  #Run LVS
  /sbin/ipvsadm
  #end
;;
stop)
 echo "close LVS Directorserver"
/sbin/ipvsadm -C
;;
*)
echo "Usage: $0 {start|stop}"
exit 1
esac

4.42|43上運行

[root@c7-42 ~]# cat re.sh
#!/bin/sh
VIP=10.0.0.110
#. /etc/rc.d/init.d/functions
case "$1" in
    start)
        echo "Start LVS of RealServer"
        /sbin/ifconfig lo:0 $VIP broadcast $VIP netmask 255.255.255.255 up
        echo "1" >/proc/sys/net/ipv4/conf/lo/arp_ignore
        echo "2" >/proc/sys/net/ipv4/conf/lo/arp_announce
        echo "1" >/proc/sys/net/ipv4/conf/all/arp_ignore
        echo "2" >/proc/sys/net/ipv4/conf/all/arp_announce
        ;;
    stop)
        /sbin/ifconfig lo:0 down
        echo "Stop LVS of RealServer"
        echo "0" >/proc/sys/net/ipv4/conf/lo/arp_ignore
        echo "0" >/proc/sys/net/ipv4/conf/lo/arp_announce
        echo "0" >/proc/sys/net/ipv4/conf/all/arp_ignore
        echo "0" >/proc/sys/net/ipv4/conf/all/arp_announce
        ;;
    *)
        echo "Usage:$0{start|stop}"
        exit 1
esac

5.安裝apache服務

[root@c7-42 ~]# yum -y install httpd

6.創建測試頁面

[root@c7-42 ~]# cat /var/www/html/index.html
web1
[root@c7-42 ~]# cat /var/www/html/index.html
web2

7.開啓httpd服務

[root@c7-42 ~]# systemctl start httpd

8.驗證