haproxy.cfg.tmpl

global
    maxconn 2000
    pidfile /var/run/haproxy.pid
    log     127.0.0.1 local0
    log     127.0.0.1 local1 notice

    # echo "" | nc -U /var/run/haproxy.sock
    stats   socket /var/run/haproxy.sock mode 777

resolvers docker
  nameserver dns "${DNS_TCP_ADDR}:${DNS_TCP_PORT}"

defaults
    log         global
    mode        http
    option      dontlognull
    option      forwardfor
    option      httpclose
    option      httplog
    retries     3
    timeout     check    5s
    timeout     client   5s
    timeout     connect  10s
    timeout     server   10s

frontend web
  bind   *:80
  mode   http
  option http-server-close
  option forceclose
  default_backend application-backend


backend application-backend
  {{range gets "/app/servers/*"}} server {{base .Key}} {{.Value}}:80 check resolvers docker resolve-prefer ipv4
  {{end}}

listen stats
    bind *:9000
    mode http

    #This is the virtual URL to access the stats page
    stats uri /haproxy_stats

    #Authentication realm. This can be set to anything. Escape space characters with a backslash.
    stats realm HAProxy\ Statistics

    #The user/pass you want to use. Change this password!
    stats auth admin:admin

    #This allows you to take down and bring up back end servers.
    #This will produce an error on older versions of HAProxy.
    stats admin if TRUE