Trouble with somewhat complex proxy config

[Daniel Jabbour]

Hi,

So basically here is what I'm trying to accomplish:

1. I have several different rails apps running inside passenger standalone instances. I'd use the module, but I need to have separate ruby versions / parameters for each, so they're happily on standalone instances.

2. The standalone instances run fine and I can connect to them.

3. Based on the presence of an argument "needle" in the GET params, I want to proxy pass to different locations. If the $needle is present, I want to proxy to $needle.somehost.com. Otherwise I want to proxy to localhost:3000. I know this sounds a little crazy, and I'd rather not get into "why," suffice it to say it's a pretty unique setup.

Here is my config, though it isn't quite working out. I get internal errors from nginx after a long timeout.

server {
  listen host.ip.address:443 ssl;
  server_name  host.server.com;
  root /var/www;
 
  ssl_certificate /my.crt;
  ssl_certificate_key /my.key; 
  
  error_page 500 502 503 504	/50x.html;
  location = /50x.html {
    root   html;
  }
  
  location / {
    resolver dns.ip.address;
    if ($args ~* needle=([a-z0-9\-]+)\&? ) {
      set          $needle         $1;
      proxy_pass   https://$needle.somehost.com;
      break;
    }
    proxy_pass http://127.0.0.1:3000;
    proxy_set_header Host $host;
  }
}

Any assistance would be greatly appreciated.

--
Daniel Jabbour
Inigral, Inc. | The Social Web For Education