how to use my own FD in NGINX

Philippe RAZAVET razavet at
Tue May 3 11:49:23 MSD 2011

agentzh wrote:
> On Thu, Mar 24, 2011 at 4:37 PM, Philippe RAZAVET
> <razavet at>  wrote:
>> Hi
>> I plan to use NGINX HTTP server on Linux, it uses epoll event loop.
>> I want to develop a NGINX proxy module using File Descriptors of my
>> own (not TCP socket) to forward the requests to a back-end service, and let
>> NGINX adds those FDs in his epoll FD set, to handle the responses.
>> What are the steps to achieve this goal ? (I suppose it is much work
>> than a simple proxy module, maybe involving upstream and event module
>> development ?)
> The ngx_drizzle [1] and ngx_postgres [2] modules do register their own
> fd's into the nginx event model. You can take a look at their source
> code. The ngx_http_upstream module can serve as some kind of a basis,
> but it is very limited in its design so we extend it a lot in the two
> modules mentioned above and bypass about half of its code paths.
> Cheers,
> -agentzh
> [1]
> [2]
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> nginx-devel at
Thanks ! I will have a look to these modules...

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