HAProxy + WebSocket Disconnection

Question

I am using HAProxy to send requests, on a subdomain, to a node.js app.

I am unable to get WebSockets to work. So far I have only been able to get the client to establish a WebSocket connection but then there is a disconnection which follows very soon after.

I am on ubuntu. I have been using various versions of socket.io and node-websocket-server. The client is either the latest versions of Safari or Chrome. HAProxy version is 1.4.8

Here is my HAProxy.cfg

global      maxconn 4096      pidfile /var/run/haproxy.pid      daemon   defaults      mode http       maxconn 2000       option http-server-close     option http-pretend-keepalive      contimeout      5000     clitimeout      50000     srvtimeout      50000  frontend HTTP_PROXY     bind *:80       timeout client  86400000      #default server     default_backend NGINX_SERVERS      #node server     acl host_node_sockettest hdr_beg(host) -i mysubdomain.mydomain  use_backend NODE_SOCKETTEST_SERVERS if host_node_sockettest   backend NGINX_SERVERS  server THIS_NGINX_SERVER 127.0.0.1:8081  backend NODE_SOCKETTEST_SERVERS timeout queue   5000 timeout server  86400000  server THIS_NODE_SERVER localhost:8180 maxconn 200 check 

I've trawled the web and mailing list but can not get any of the suggested solutions to work.

(p.s. this could be for serverfault, but there are other HAProxy question on S.O, so I have chosen to post here)

Answer 1

Upgrade to latest version of socket.io (0.6.8 -> npm install [email protected], which is patched to work with HAProxy) and download the latest version of HAProxy.

Here is an example config file:

global     maxconn     4096 # Total Max Connections. This is dependent on ulimit     nbproc      2  defaults     mode        http  frontend all 0.0.0.0:80     timeout client 5000     default_backend www_backend     acl is_websocket hdr(Upgrade) -i WebSocket     acl is_websocket hdr_beg(Host) -i ws      use_backend socket_backend if is_websocket  backend www_backend     balance roundrobin     option forwardfor # This sets X-Forwarded-For     timeout server 5000     timeout connect 4000     server server1 localhost:8081 weight 1 maxconn 1024 check     server server2 localhost:8082 weight 1 maxconn 1024 check     server server3 localhost:8083 weight 1 maxconn 1024 check  backend socket_backend     balance roundrobin     option forwardfor # This sets X-Forwarded-For     timeout queue 5000     timeout server 5000     timeout connect 5000     server server1 localhost:8081 weight 1 maxconn 1024 check     server server2 localhost:8082 weight 1 maxconn 1024 check     server server3 localhost:8083 weight 1 maxconn 1024 check