install haproxy in centos code example

Example: haproxy in centos 7

global
   log /dev/log local0
   log /dev/log local1 notice
   chroot /var/lib/haproxy
   stats socket /run/haproxy/admin.sock mode 660 level admin
    stats timeout 30s
    user haproxy
    group haproxy
    daemon

defaults
     log global
     mode http
     option httplog
     option dontlognull
     timeout connect 5000
     timeout client 50000
     timeout server 50000

frontend http_front
     bind *:80
     stats uri /haproxy?stats
     default_backend http_back

backend http_back
     balance roundrobin
     server my_server private_IP:80 check
     server my_server private_IP:80 check