HAProxy Maintain Connections to Backend regardless of Frontend Connections

connectionhaproxy

Is there a way to configure HAProxy to maintain an X number of open HTTP connections to the backend that get reused by new HTTPS connections (i.e. requests) to the frontend, and keep the backend connections open even after the frontend connections are closed?

Thank you!

Best Answer

There is an http-reuse option http://cbonte.github.io/haproxy-dconv/1.7/configuration.html#4-http-reuse

This will make HAProxy send HTTP requests for a given HTTP session using already established connections of a different HTTP sessions. But it won't maintain any open connections if the there is no more frontend connections. I don't think that HAProxy can do it anyway.

Related Solutions

Linux – How to configure HAProxy to route by port without using multiple frontend or listeners

Using a single frontend and multiplexing to the backends is indeed possible. You will be required to add one backend section per backend server, e.g.

backend JabberD1
    tcp-check connect
    tcp-check send PING\r\n
    tcp-check expect string +PONG
    server Server1ZoneD 10.60.30.209:80  check

backend JabberE1
    tcp-check connect
    tcp-check send PING\r\n
    tcp-check expect string +PONG
    server Server1ZoneE 10.60.47.4:80    check

etc.

In your frontend, split the traffic like this

    acl d1 dst_port 5222
    use_backend JabberD1 if d1

etc.

Haproxy backend servers on different interfaces

From HAProxy manual, section 5:

The "source" parameter sets the source address which will be used when connecting to the server. It follows the exact same parameters and principle as the backend "source" keyword, except that it only applies to the server referencing it. Please consult the "source" keyword for details.

Best Answer

Related Solutions

Linux – How to configure HAProxy to route by port without using multiple frontend or listeners

Haproxy backend servers on different interfaces

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