Hi,

I just started playing with Nginx. My goal is to rate limit requests to a set of backend proxies, and it looks like I want to do this using the modules HttpUpstreamModule, HttpProxyModule, and HttpLimitReqModule modules.

I see that HttpUpstreamModule marks an upstream server as inoperable based on the setting of proxy_next_upstream. However, I need to be able to mark a server as inoperable given conditions that I don't appear to be able to set. Specifically, if I could examine the results of a server response and mark it inoperable, or operable, based on the contents, that'd be best. Another, possibly less complicated solution would be for me to mark a server inoperable if the http status in the response is 302, but I don't see a "http_302" for proxy_next_upstream.

It would also be great if the amount of time before re-checking a server marked as inoperable was configurable separate from HttpUpstreamModule's fail_timeout (so I could say something like, if a server fails once in 1 second mark it inoperable, but don't try to check it again for 3 hours).

Am I overlooking options to do what I want to do here?

Thanks!
Andy