nginx.conf

http {
  upstream app_server {
    # for UNIX domain socket setups:
    server unix:/tmp/app.sock fail_timeout=0;

    # for TCP setups, point these to your backend servers
    # server 127.0.0.1:8081 fail_timeout=0;
    # server 127.0.0.1:8082 fail_timeout=0;
    # server 127.0.0.1:8083 fail_timeout=0;
  }

  upstream auth_server {
    # for UNIX domain socket setups:
    server unix:/tmp/auth.sock fail_timeout=0;

    # for TCP setups, point these to your backend servers
    # server 127.0.0.1:8084 fail_timeout=0;
    # server 127.0.0.1:8085 fail_timeout=0;
    # server 127.0.0.1:8086 fail_timeout=0;
  }

  upstream search_server {
    # for UNIX domain socket setups:
    server unix:/tmp/auth.sock fail_timeout=0;

    # for TCP setups, point these to your backend servers
    # server 127.0.0.1:8087 fail_timeout=0;
    # server 127.0.0.1:8088 fail_timeout=0;
    # server 127.0.0.1:8089 fail_timeout=0;
  }

  server {
    listen 80 default deferred; # for Linux

    client_max_body_size 4G;
    server_name _;

    keepalive_timeout 5;

    # path for static files
    root /path/to/app/current/public;

    try_files $uri/index.html $uri.html $uri @app;

    location /chat {
      proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
      proxy_set_header X-Forwarded-Proto $scheme;

      proxy_set_header Host $http_host;
      proxy_redirect off;

      proxy_pass http://app_server;
    }

    location /search {
      proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
      proxy_set_header X-Forwarded-Proto $scheme;

      proxy_set_header Host $http_host;
      proxy_redirect off;

      proxy_pass http://search_server;
    }

    location /users {
      proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
      proxy_set_header X-Forwarded-Proto $scheme;

      proxy_set_header Host $http_host;
      proxy_redirect off;

      proxy_pass http://auth_server;
    }

    # Rails error pages
    error_page 500 502 503 504 /500.html;
    location = /500.html {
      root /path/to/app/current/public;
    }
  }
}