upstream using header value

[Igor Sysoev]

On Fri, May 28, 2010 at 01:41:48PM -0700, PatRoy wrote:

> Hi,
> 
> Can someone tell me if it's possible to proxy the requests to
> different servers by using an http header value. So for example we
> have 2 web servers and if the request has the http header "group_id"
> between 0 and 100 then those go to server #1, and between 100 and 200,
> they go to server #2?
> 
> Can you do this with a module like upstream_hash ??

http {
    map $http_group_id  $backend {
         default         1;
         0               1;
         1               1;

         ...

         100             1;
         101             2;

         ...

         200             2;
    }

    upstream  backend1 {
        server   server1;
    }

    upstream  backend2 {
        server   server1;
    }

    server {
        location / {
            proxy_pass   http://backend$backend;
        }


-- 
Игорь Сысоев
http://sysoev.ru