Hello!

On Wed, Sep 03, 2014 at 12:50:27AM +0500, Aleem B wrote:

> Hello,
>
> I couldn't find much information other than this thread
> http://mailman.nginx.org/pipermail/nginx/2008-February/003550.html which
> is a dead-end.
>
> I would like to add the selected backend/upstream to an "X-Backend" header
> before dispatching the request to the backend.

You can't. The request is created _before_ the backend server
will be selected (and the same request may be sent to more than
one backend server due to proxy_next_upstream).

--
Maxim Dounin
http://nginx.org/

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