Feedback on my module

Umesh Sirsiwal usirsiwal at
Fri Apr 1 18:44:15 MSD 2011

Hey Tarek,
You can use combination of nginx_memc 
( and nginx_lua 
( to achieve the same 

Here is an example:

|location /blah {
         rewrite_by_lua '
	    if($http_x_target_service == nil) then
	    local res = ngx.location.capture("/memc/$http_x_target_service")

             if res.status != ngx.HTTP_OK then
	|     end
	    if(res.body != "up") then
|||         ';

         # proxy_pass


On 04/01/2011 08:07 AM, Tarek Ziade wrote:
> Hey,
> I hope this is the right list for this kind of question -- seems more
> suitable than nginx@ --
> I have started the development of a module that does the following:
> One each request, if a X-Target-Service header is present, the module
> checks in memcached a flag. Depending on the value, it returns a 503 or
> pass the request to the upstream server.
> The goal here is to manage in memcache the status of backend services
> the application uses like twitter, linkedin etc, and reject any request
> to the server if those services are down for any reason.
> I would love to get some feedback/advices from anyone experimented in
> Nginx, as I am new to this and my C skills are from college ;)
> The memcached code still need a few changes like catching any
> libmemcached error etc, but the nginx module logic is basically done.
> the code is here:
> Cheers
> Tarek

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