limit_conn_zone applied to Proxy_Pass (outgoing requests)

[Valentin V. Bartenev]

On Thursday 03 July 2014 21:51:44 aflexzor wrote:
> Hello!
> 
> I have an nginx reverse proxy it has a series of filters against DDoS
> attacks.
> 
> As a last resort I need to make sure that I NEVER send more than x
> concurrent requests to the backend server (Proxy_pass)
> 
> Is it possible to apply limit_conn_zone for outgoing requests? If so could
> i have an example? Thanks.
> 

Look at the "max_conn" parameter of the "server" directive
in the "upstream" block:
http://nginx.org/en/docs/http/ngx_http_upstream_module.html#server

Note that it's part of the commercial version of nginx.

  wbr, Valentin V. Bartenev