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POCan I have sticky sessions with HAProxy and socket.io with authentication?
 

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  1. POCan I have sticky sessions with HAProxy and socket.io with authentication?
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    <p>I have several instances of socket.io with authentication running under HAProxy and I need to force that the authentication request and the socket connection go to the same instance. I've set up HAProxy based on <a href="https://stackoverflow.com/questions/4360221/haproxy-websocket-disconnection/4737648#4737648">this answer to a SO question</a> with some modifications as so:</p> <pre><code>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 86400000 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 url_param sessionId option forwardfor # This sets X-Forwarded-For timeout server 30000 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 url_param sessionId option forwardfor # This sets X-Forwarded-For timeout queue 5000 timeout server 86400000 timeout connect 86400000 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 </code></pre> <p>I've tried url_param (where sessionId is a querystring parameter passed in both the authentication call and the websocket connection) and source as the balance options but it seems as if HAProxy only allows these options for HTTP connections and so ignores them for the actual websocket connection. The result is that sometimes the auth request and the socket connection end up in different servers, which is unacceptable for our application.</p> <p>Is there some way to have this desired behavior?</p>
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      1. POCan I have sticky sessions with HAProxy and socket.io with authentication?
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    1. CODid you ever figure out the best way to do this? I was looking to do the same thing. Thanks.
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      1. USJason Pudzianowski
    2. COI ended up using IP-hash balancing. All requests from the same IP go to the same server
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      1. POCan I have sticky sessions with HAProxy and socket.io with authentication?
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    3. COO ok, but does that mean that a websocket being broadcasted from a user on server A does not reach any of the users on server B?
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      1. POCan I have sticky sessions with HAProxy and socket.io with authentication?
      1. USJason Pudzianowski
 

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