Get rails server port through load balancer

Question

End goal: I am attempting to fetch the Ruby on Rails port

I am using nginx as a load-balancer, to juggle between several different ruby on rails servers that I have running using thin.

I followed this tutorial to figure out how to proxy_pass to the different servers, but I want to see if it is indeed working. The only way I can figure out if this is working, is to see the port that the thin server is running on.

I am unable to use request.port as the request is actually routed through nginx, therefore every request port has 80. When I need the port that the rails server is truly running on.

Per this answer, I've tried using:

Rails::Server.new.options[:Port]

Which works just fine in Development mode, but when switching to production mode, it gives me a 500 saying

FATAL -- : ActionView::Template::Error (uninitialized constant Rails::Server)

nginx config

server_name myname.com;

upstream dashboard_servers {
  server <hidden>:3001 fail_timeout=0;
  server <hidden>:3002 fail_timeout=0;
  server <hidden>:3003 fail_timeout=0;
  server <hidden>:3004 fail_timeout=0;
}

server {
  listen 3000;

  location / {
    # set proxy headers
    proxy_set_header    Host $host;
    proxy_set_header    X-Real-IP $remote_addr;
    proxy_set_header    X-Forwarded-For $proxy_add_x_forwarded_for;

    proxy_pass http://dashboard_servers;
  }
}

my rails servers are on ports 3001-3004 and this is the port i need.

How can I get the port that the Rails server is truly running on?

just to make sure, is nginx and all the ruby servers working on the same server? please clarify the set up — Mohammad AbuShady, Feb 17 '15 at 19:16

score 0 · Answer 1 · answered Feb 17 '15 at 19:33

0

Well if you're trying to run that command in rails console, I think that's why it's giving you that error, because there's no port, I just tested this locally by adding that line in my layout and it worked fine

answered Feb 17 '15 at 19:33

Mohammad AbuShady

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It wasn't via console, unfortunately.. was calling this from a controller, via my URL – ddavison Feb 17 '15 at 22:47
check http://stackoverflow.com/questions/1554267/how-to-find-the-local-port-a-rails-instance-is-running-on – Mohammad AbuShady Feb 18 '15 at 05:57
I do appreciate you trying to help, thanks Mohammad. i do regret to say, however, that i had already tried the solutions in there :( – ddavison Feb 19 '15 at 03:37
could you add your nginx config for the load balancer – Mohammad AbuShady Feb 19 '15 at 05:29

Get rails server port through load balancer

nginx config

1 Answers1