How to change the default binding ip of Rails 4.2 development server?

Question

After upgrading our team's rails application to 4.2, as the release note mentioned, the default ip rails server binds to is changed to localhost from 0.0.0.0.

We develop with Vagrant, and want the development server to be accessible directly from browser on the host machine.

Instead of typing rails s -b 0.0.0.0 every time from now on, I wonder if there's any more elegant solution, so that we can still use sth as simple as rails s to start the server. Perhaps:

• a config file rails s reads where I can modify the default binding ip (without using -c)
• port forward with vagrant (tried but failed, see problem encountered below)
• a monkey patch to rack, that changes the default binding ip

The real goal behind this is that I want the upgrade to be smooth among our team, avoiding the glitch that people will have to constantly restarting their rails server due to the missing -b 0.0.0.0 part.

I tried vagrant port forwarding, but still get Connection Refused when I visit localhost:3000 on the host machine. The two configuration lines I tried was:

config.vm.network "forwarded_port", guest: 3000, host: 3000 config.vm.network "forwarded_port", guest: 3000, guest_ip: '127.0.0.1', host: 3000 

Didn't find any relevant instructions in the official docs. Any help will be appreciated.

Answer 1

I'm having the same issue here and I found today a better solution. Just append this code to your config/boot.rb and it should work with vagrant.

require 'rails/commands/server' module Rails   class Server     def default_options       super.merge(Host:  '0.0.0.0', Port: 3000)     end   end end 

ps: Its based on: this answer

Answer 2

You can use foreman to run a Procfile with your custom commands:

# Procfile in Rails application root web:     bundle exec rails s -b 0.0.0.0 

Now start your Rails application with:

foreman start 

The good thing about foreman is that you can add other applications to the Procfile (like sidekiq, mailcatcher).

The bad thing about foreman is that you have to train your team to run foreman start instead of rails s.