HAProxy config for Play 2.0 app with WebSocket support

haproxy.cfg

global
    maxconn     4096 # Total Max Connections. This is dependent on ulimit
    nbproc      1

defaults
    mode        http

frontend all 0.0.0.0:80
    timeout client 86400000
    default_backend play_server
    acl is_websocket hdr(Upgrade) -i WebSocket
    acl is_websocket hdr_beg(Host) -i ws
    use_backend play_server if is_websocket

backend play_server
    balance roundrobin
    option forwardfor # This sets X-Forwarded-For
    timeout queue 5000
    timeout server 86400000
    timeout connect 86400000
    server apiserver 127.0.0.1:9000 weight 1 maxconn 1024 check