HAProxy configuration for the socket.io chat example, splitted into frontend and websocket servers.

haproxy.cfg

global
  log 127.0.0.1 local0
  maxconn 8192
  user haproxy
  group haproxy

defaults
  log global
  mode http
  option httplog
  option http-server-close
  option dontlognull
  option redispatch
  option contstats
  retries 3
  backlog 10000
  timeout client          35s
  timeout connect          5s
  timeout server          35s
  timeout tunnel        3600s
  timeout http-keep-alive  1s
  timeout http-request    15s
  timeout queue           30s
  timeout tarpit          60s
  default-server inter 3s rise 2 fall 3
  option forwardfor

listen stats
   bind *:8080
   stats enable
   stats hide-version
   stats realm Haproxy\ Statistics
   stats uri /status
   stats auth user:password

frontend public
  bind *:80
  maxconn 10000
  acl is_websocket hdr_end(host) -i ws.node-example.com
  use_backend ws if is_websocket
  default_backend www

backend www
  timeout check 5000
  option httpchk GET /status?haproxy=1
  balance roundrobin
  server www1 10.142.0.3:3001 maxconn 1000 weight 10 cookie websrv_www check inter 10000 rise 1 fall 3
  server www2 10.142.0.6:3001 maxconn 1000 weight 10 cookie websrv_www check inter 10000 rise 1 fall 3

backend ws
  timeout check 5000
  option httpchk GET /status?haproxy=1
  balance roundrobin
  cookie HAPROXY_COOKIE insert indirect nocache
  server ws1 10.142.0.4:3002 maxconn 1000 weight 10 cookie websrv_ws check inter 10000 rise 1 fall 3 check cookie ws1
  server ws2 10.142.0.7:3002 maxconn 1000 weight 10 cookie websrv_ws check inter 10000 rise 1 fall 3 check cookie ws2