Put your app online with Shelly Cloud

Created by Kasia Jarmołkowicz, @_idengager

Shelly Cloud is a PaaS (Platform as a Service) hosting provider, dedicated for Ruby on Rails apps. New users get €20 worth of credit to run their applications, which is more than enough to show off your first Rails app for a couple of weeks.

This guide assumes you followed through with your first Rails app guide. If you get stuck at any point in this tutorial, take a look at the docs or use one of our support channels.

Coach: For an overview of deploying to Shelly Cloud, look at the Quick Start guide.

Prepare your app for deployment

You need to change the database your app uses from SQLite to PostgreSQL and add a gem that ensures seamless deployment to Shelly Cloud. Replace the following line in your Gemfile:

gem 'sqlite3'


group :development do
  gem 'sqlite3'

group :production do
  gem 'pg'
  gem 'shelly-dependencies'

and then run bundle install.

$ bundle install

Coach: Talk about relational databases and the differences between SQLite and PostgreSQL.

Initialize your git repository

You should now commit the changes to your git repository. If you haven’t initialized one yet, take a look at this Github Rails Girls guide or use the Github’s docs directly.

When your repo is all set, use git commit to save your changes.

$ git add .
$ git commit -m 'Replace sqlite with postgres, add shelly-dependencies gem'

Coach: Explain the importance of helpful commit messages.

Sign up for Shelly Cloud

You can sign up for Shelly Cloud using the sign-up form. Clicking on the link in the confirmation email will complete your sign-up process. You can now install the shelly gem:

$ gem install shelly

and type shelly login to log in:

$ shelly login
Email (you@example.com - default): [enter your email]
Password: [enter your password]
Login successful
Uploading your public SSH key

Tip: The shelly gem will look for a public SSH key in your ~/.ssh directory, choosing either a DSA key id_dsa.pub or a RSA key id_rsa.pub. If you’re not sure if you have a SSH key already, take a look at this helpful Github article.

Create your cloud

All the information needed for your app to work with Shelly Cloud will be stored in the Cloudfile, a little file that should be placed in your app main directory. We can generate a default Cloudfile, which will fit our needs perfectly, using the shelly gem.

Tip: If you need a specific Ruby version or want to use a different database, check the Cloudfile documentation to help you set it up.

You are now ready to create your cloud! Make sure you’re in your app directory, type shelly add and follow the instructions.

$ cd ~/your-app
$ shelly add -c [enter the name of your cloud]

You should commit your Cloudfile, too, with an appropriate commit message.

$ git add Cloudfile
$ git commit -m 'Add Cloudfile'

Push to production

You put your app in the cloud using git push.

$ git push shelly master
  ---> Received push to cloud 'your-cloud-name'
  ---> Checking Gemfile
  ---> Creating code package... done.
  ---> Push accepted
  ---> Start your cloud using: `shelly start --cloud your-cloud-name`

You can now start your app.

$ shelly start --cloud your-cloud-name
Starting cloud your-cloud-name.
  ---> Launching server app1 started
  ---> Launching server app1 finished
  ---> Configuration on server app1 started
  ---> Configuration on server app1 finished
  ---> Deployment on server app1 started
  ---> Deployment on server app1 finished
Starting cloud successful

Tip: If you make changes to your app, you can just commit them and use git push shelly master to redeploy.


Your app is now live at http://your-cloud-name.shellyapp.com. Share it with the world and keep coding!