Ubuntu, LVS+keepalived+Nginx

LVS Server : 192.168.0.201
Virtual IP : 192.168.0.220
Nginx Server1 : 192.168.0.202
Nginx Server2 : 192.168.0.203

Nginx Server1(192.168.0.202) & Nginx Server2(192.168.0.203), do following same settings:
     1.Edit /etc/rc.local,add following content, then restart linux server

          #!/bin/sh -e
          #
          # rc.local
          #
          # This script is executed at the end of each multiuser runlevel.
          # Make sure that the script will "exit 0" on success or any other
          # value on error.
          #
          # In order to enable or disable this script just change the execution
          # bits.
          #
          # By default this script does nothing.
          ifconfig lo:0 192.168.0.220 netmask 255.255.255.255 broadcast 192.168.0.220 up
          route add -host 192.168.0.220 dev lo:0
          echo "0" > /proc/sys/net/ipv4/ip_forward
          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
          exit 0

     2.sudo apt-get install nginx & sudo ufw allow 80/tcp & sudo service nginx start

LVS Server(192.168.0.201):
     1.sudo apt-get install ipvsadm keepalived
     2.edit /etc/keepalived/keepalived.conf, add following contents

               global_defs {
                       router_id LVS_DEVEL
               }
               vrrp_instance VI_1 {
                       state MASTER
                       interface eth0
                       virtual_router_id 51
                       priority 100 
                       advert_int 1
                       authentication {
                               auth_type PASS
                               auth_pass 1111
                       }
                       virtual_ipaddress {
                               192.168.0.220
                       }
               }
               virtual_server 192.168.0.220 80 {
                       delay_loop 1 
                       lb_algo wrr
                       lb_kind DR 
                       #persistence_timeout 60 
                       protocol TCP 
                       real_server 192.168.0.202 80 {
                               weight 3 
                               TCP_CHECK {
                                       connect_timeout 10 
                                       nb_get_retry 3
                                       delay_before_retry 3
                                       connect_port 80
                               }
                       }
                       real_server 192.168.0.203 80 {
                               weight 3
                               TCP_CHECK {
                                       connect_timeout 10
                                       nb_get_retry 3
                                       delay_before_retry 3
                                       connect_port 80
                               }
                       }
               }    

     3.sudo service keepalived start
     4.sudo ipvsadm -ln (check ipvsadm settings)
                IP Virtual Server version 1.2.1 (size=4096)
               Prot LocalAddress:Port Scheduler Flags
                 -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
               TCP  192.168.0.220:80 wrr
                 -> 192.168.0.202:80             Route   3      0          0        
                 -> 192.168.0.203:80             Route   3      0          0