Question

Ruby only shows script (doesn't run)

I am a complete noob and I’m sure I’ve done something wrong, but I’m at a loss in how to make it work. I’ve written a basic “Hello World” script and put it in my /var/www/html/sites directory on Centos. I’ve followed the DO tutorial to install apache, passenger, and sinatra. Tutorial. When I go to my webpage using the ip address I get the apache welcome screen as I should. When I go to http://ip/ruby_script.rb, I get the contents of the script. I can’t seem to get the script to actually run. The script requires sinatra, so I run “ruby script.rb” at the command line before I try and hit the web page so that sinatra is running. I’m sure I’m missing a fundamental step because everything I read seems to indicate that this is a simple process. If you need more specifics to help me, please let me know. I’m feeling a little stupid because I think this should be very simple. BTW, this is the simple script I’m trying to run.

#!/usr/bin/ruby

require 'twilio-ruby'
require 'sinatra'

get '/' do
    'Hello World! Currently running version ' + Twilio::VERSION + \
        ' of the twilio-ruby library.'
end
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Andrew SB • June 10, 2016

The Sinatra script should not be located directly in the web directory. You’ll also need a config.ru file that describes how Passanger should run the programs. You file layout should look something like:

# tree /var/www/html/
/var/www/html/
├── app.rb
├── config.ru
├── public
└── tmp

A basic config.ru would look like:

require 'rubygems'
require 'sinatra'
require File.expand_path '../app.rb', __FILE__

run Sinatra::Application

And your Apache configuration should look similar to the following. It’s important to note that the path to your passenger_module might be different. When you ran the passenger-install-apache2-module it should have provided you with the correct value.

<VirtualHost *:80>
    ServerName www.example.com
    DocumentRoot /var/www/html/public

    LoadModule passenger_module /usr/local/rvm/gems/ruby-2.2.1/gems/passenger-5.0.28/buildout/apache2/mod_passenger.so
    <IfModule mod_passenger.c>
        PassengerRoot /usr/local/rvm/gems/ruby-2.2.1/gems/passenger-5.0.28
        PassengerDefaultRuby /usr/local/rvm/gems/ruby-2.2.1/wrappers/ruby
    </IfModule>

    <Directory /var/www/html/public>
        Require all granted
        Allow from all
        Options -MultiViews
    </Directory>
</VirtualHost>

Remember to restart Apache after making configuration changes:

sudo service apache2 restart

For more information on using Sinatra with Passenger and Apache, see Sinatra Recipes.

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