haproxy.cfg

global
    log stdout format raw local0

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

frontend http_front
    bind *:80
    default_backend model_backend

backend model_backend
    balance roundrobin
    server model1 model1:80 check
    server model2 model2:80 check