Starting a rails app to the external ip address - ruby-on-rails

Question

I have a ruby on rails application and I am trying to run it on the external ip of my google compute engine ubuntu 14.04 LTS VM.
I try rails server -e production
and the output is:
=> Booting Puma
=> Rails 4.2.4 application starting in production on http://localhost:3000
=> Run `rails server -h` for more startup options
=> Ctrl-C to shutdown server
Puma 2.14.0 starting...
* Min threads: 0, max threads: 16
* Environment: production
* Listening on tcp://localhost:3000
I do not want it to be at that location; I want it to be viewable from the external ip address of the server.
Part of the issue is that I do not know if this is a rails, a puma, or a google compute engine question.
Note: I can't see if it actually launching at localhost:3000 because the VM is just a terminal.

Answer 1

(I am assuming you are using nginx, if not, apt-get install nginx; service nginx start)
If possible, show your nginx.conf (/etc/nginx/nginx.conf) and default.conf (/etc/nginx/sites-available/default.conf)
Since you are using puma (I use it too) you should setup nginx conf file and set server upstream equal to puma's binding.
# /etc/nginx/sites-available/default.conf
upstream your_app {
server 127.0.0.0.1:9292;
}
server {
listen 80;
server_name your_domain;
root /usr/share/nginx/your_app/public;
# or, if you are using capistrano
root /usr/share/nginx/your_app/current/public;
location / {
proxy_pass http://your_app; # equal to upstream "name"
...
}
....
}
# config/puma.rb
[...]
bind "tcp://127.0.0.1:9292"
And execute puma's server
$ bundle exec puma RAILS_ENV=production &
After doing this steps and if the application still doesn't work, output your /var/log/nginx/error.log, nginx.conf and default.conf