Rejecting new HTTP requests when server reaches a certain throughput

Posted by Sam on Server Fault See other posts from Server Fault or by Sam
Published on 2010-10-05T21:48:24Z Indexed on 2010/12/29 23:56 UTC
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http

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limit

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rate

I have a requirement to run an HTTP server that rejects new HTTP requests (with a 503, or similar) when the global transfer rate of current HTTP responses exceeds a certain level. For example, if the web server is transferring at 98Mbps, and a new HTTP request arrives, we would want to reject this (as we couldn't guarantee a good speed).

I've had a look at mod_cband for Apache, limit_req for nginx, and lighttpd's rate limiting features, but none of them seem to handle my (rather contrived, granted) use case.

I should add that I'm open to using pretty much any web server, and am open to implementing this in iptables rules if someone can craft such a rule! (Refusing the TCP connection is fine, it doesn't have to respond with an HTTP 503).

Any suggestions?

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