Deploying Padrino Applications On Heroku

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Tags: padrino, ruby

This article is part of an ongoing series about my exploration of the Padrino web framework. If you want to read more about it please check out padrinobook.com. You sniff around in the sources of the book under GitHub.


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I was always asking myself how I can use cloud services like heroku to deploy Padrino applications without having an own server.

In this post I'm going to show you how you can a simple "Hello Padrino" app on heroku - ones without and ones with database interactions.

(Note: This post is tested with padrino 0.12.0, and heroku-toolbelt/3.4.1)

Installing Heroku

$ gem install heroku
Fetching: heroku-3.4.2.gem (100%)
 !    The `heroku` gem has been deprecated and replaced with the Heroku Toolbelt.
 !    Download and install from: https://toolbelt.heroku.com
 !    For API access, see: https://github.com/heroku/heroku.rb
Successfully installed heroku-3.4.2
Parsing documentation for heroku-3.4.2
Installing ri documentation for heroku-3.4.2
Done installing documentation for heroku after 1 seconds
1 gem installed

Hmm, the method above is working but I highly recommend you to follow the installations instructions from toolbelt.heroku.com page:

$ wget -qO- https://toolbelt.heroku.com/install-ubuntu.sh | sh

To check if everything went well, you can run the following command:

$ heroku version
heroku-toolbelt/3.4.1 (i686-linux) ruby/1.9.3

Hello World

Creating a new app:

$ padrino generate project hello-world-heroku
    create
    create  .gitignore
    create  config.ru
    create  config/apps.rb
    create  config/boot.rb
    create  public/favicon.ico
    create  public/images
    create  public/javascripts
    create  public/stylesheets
    create  tmp
    create  .components
    create  app
    create  app/app.rb
    create  app/controllers
    create  app/helpers
    create  app/views
    create  app/views/layouts
    create  Gemfile
    create  Rakefile
  skipping  orm component...
  skipping  test component...
  skipping  mock component...
  skipping  script component...
  applying  slim (renderer)...
     apply  renderers/slim
    insert  Gemfile
  skipping  stylesheet component...
 identical  .components
     force  .components
     force  .components

=================================================================
hello-world-heroku is ready for development!
=================================================================
$ cd ./hello-world-heroku
$ bundle
=================================================================

The next part is to create a route in app/app.rb:

module HelloWorldHeroku
  class App < Padrino::Application
    ...
    get "/" do
      "Hello Padrino On Heroku"
    end
  end
end

Next, you need to setup your account on heroku.com:

Hello Padrion on heroku

Next you need to click on "Create a new app":

New App On Heroku

Initialize an empty git repository, make an initial commit, and add the heroku remote:

$ cd hello-world-heroku
$ git init && git add . && git commit -m "Initial commit"
$ git remote add heroku git@heroku.com:hello-world-padrino.git

The Path You Need

When everything is setup in the right way, you need to push:

$ git push --set-upstream heroku master
  Initializing repository, done.
  Counting objects: 15, done.
  Delta compression using up to 4 threads.
  Compressing objects: 100% (13/13), done.
  Writing objects: 100% (15/15), 7.88 KiB | 0 bytes/s, done.
  Total 15 (delta 0), reused 0 (delta 0)

  -----> Ruby app detected
  -----> Compiling Ruby/Rack
  -----> Using Ruby version: ruby-2.0.0
  -----> Installing dependencies using 1.5.2
         New app detected loading default bundler cache
         Running: bundle install --without development:test --path vendor/bundle --binstubs vendor/bundle/bin -j4 --deployment
         Fetching gem metadata from https://rubygems.org/.........
         Fetching additional metadata from https://rubygems.org/..
         Using minitest (4.7.5)
         Using i18n (0.6.9)
         Using rake (10.1.1)
         Using atomic (1.1.14)
         Using tzinfo (0.3.38)
         Using multi_json (1.8.4)
         Using mime-types (1.25.1)
         Using rack (1.5.2)
         Using tilt (1.4.1)
         Using bundler (1.5.2)
         Installing polyglot (0.3.3)
         Using thread_safe (0.1.3)
         Installing thor (0.17.0)
         Installing url_mount (0.2.1)
         Using treetop (1.4.15)
         Installing temple (0.6.7)
         Installing moneta (0.7.20)
         Using mail (2.5.4)
         Installing rack-protection (1.5.2)
         Installing http_router (0.11.0)
         Installing slim (2.0.2)
         Installing activesupport (4.0.2)
         Installing sinatra (1.4.4)
         Installing padrino-core (0.12.0)
         Installing padrino-helpers (0.12.0)
         Installing padrino-mailer (0.12.0)
         Installing padrino-cache (0.12.0)
         Installing padrino-admin (0.12.0)
         Installing padrino-gen (0.12.0)
         Installing padrino (0.12.0)
         Your bundle is complete!
         Gems in the groups development and test were not installed.
         It was installed into ./vendor/bundle
         Bundle completed (13.40s)
         Cleaning up the bundler cache.
  -----> Writing config/database.yml to read from DATABASE_URL
  -----> WARNINGS:
         You have not declared a Ruby version in your Gemfile.
         To set your Ruby version add this line to your Gemfile:
         ruby '2.0.0'
         # See https://devcenter.heroku.com/articles/ruby-versions for more information.
  -----> Discovering process types
         Procfile declares types -> (none)
         Default types for Ruby  -> console, rake, web

  -----> Compressing... done, 15.3MB
  -----> Launching... done, v4
         http://hello-world-padrino.herokuapp.com/ deployed to Heroku

  To git@heroku.com:hello-world-padrino.git
   * [new branch]      master -> master
  Branch master set up to track remote branch master from heroku.

If you now call hello-world-herokuapp.com you can see it and your done.

You can find the code for this application on GitHub padrino-hello-world-heroku

Database Deployments With Heroku

Let's create a new application:

$ padrino g project hello-world-heroku-postgres -d activerecord -a postgres
    create
    create  .gitignore
    create  config.ru
    create  config/apps.rb
    create  config/boot.rb
    create  public/favicon.ico
    create  public/images
    create  public/javascripts
    create  public/stylesheets
    create  tmp
    create  .components
    create  app
    create  app/app.rb
    create  app/controllers
    create  app/helpers
    create  app/views
    create  app/views/layouts
    create  Gemfile
    create  Rakefile
  applying  activerecord (orm)...
     apply  orms/activerecord
    insert  Gemfile
    insert  Gemfile
    insert  app/app.rb
    create  config/database.rb
  skipping  test component...
  skipping  mock component...
  skipping  script component...
  applying  slim (renderer)...
     apply  renderers/slim
    insert  Gemfile
  skipping  stylesheet component...
 identical  .components
     force  .components
     force  .components

=================================================================
hello-world-heroku-postgres is ready for development!
=================================================================
$ cd ./hello-world-heroku-postgres
$ bundle
=================================================================

Go to your app and select under "Resources" the "Get Add-ons" link and chose the "Heroku Postgres" addon with the help:

Padrino On Heroku with Postgres

You can also run the following command which does the same:

$ heroku addons:add heroku-postgresql

Adding heroku-postgresql on hello-world-heroku-postgres... done, v3 (free)
Attached as HEROKU_POSTGRESQL_TEAL_URL
Database has been created and is available
 ! This database is empty. If upgrading, you can transfer
 ! data from another database with pgbackups:restore.
Use `heroku addons:docs heroku-postgresql` to view documentation.

Hmmm, let's go into the help:

$ heroku addons:docs heroku-postgresql

It will open the URL https://devcenter.heroku.com/articles/heroku-postgresql. Calling:

$ heroku config | grep HEROKU_POSTGRESQL
HEROKU_POSTGRESQL_TEAL_URL: postgres://yxkscmfxkhsvfd:hnGMVRPWmBQ06Bi3ujqP21Orl4@ec2-79-125-21-60.eu-west-1.compute.amazonaws.com:5432/dev751q4jd401b

gives us the host URL, the user, the port, as well as the password. You can get the same information under the URL https://postgres.heroku.com/databases.

Since we now have the information about our database, it's time to edit config/database.rb:

ActiveRecord::Base.configurations[:production] = {
  :adapter   => 'postgresql',
  :database  => 'dev751q4jd401b',
  :username  => 'yxkscmfxkhsvfd',
  :password  => 'hnGMVRPWmBQ06Bi3ujqP21Orl4',
  :host      => 'ec2-79-125-21-60.eu-west-1.compute.amazonaws.com',
  :port      => 5432
}

Now, it's time to push our app on heroku:

$ git push heroku master
Initializing repository, done.
Counting objects: 22, done.
Delta compression using up to 4 threads.
Compressing objects: 100% (20/20), done.
Writing objects: 100% (22/22), 9.43 KiB | 0 bytes/s, done.
Total 22 (delta 4), reused 0 (delta 0)

-----> Ruby app detected
-----> Compiling Ruby/Rack
-----> Using Ruby version: ruby-2.0.0
-----> Installing dependencies using 1.5.2
       New app detected loading default bundler cache
       Running: bundle install --without development:test --path vendor/bundle --binstubs vendor/bundle/bin -j4 --deployment
       Fetching gem metadata from https://rubygems.org/.........
       Fetching additional metadata from https://rubygems.org/..
       Using rake (10.1.1)
       Using i18n (0.6.9)
       Using minitest (4.7.5)
       Using tzinfo (0.3.38)
       Using builder (3.1.4)
       Using activerecord-deprecated_finders (1.0.3)
       Using arel (4.0.2)
       Using rack (1.5.2)
       Using mime-types (1.25.1)
       Using polyglot (0.3.4)
       Using tilt (1.4.1)
       Installing thor (0.17.0)
       Using bundler (1.5.2)
       Using pg (0.17.1)
       Installing multi_json (1.9.0)
       Installing url_mount (0.2.1)
       Installing moneta (0.7.20)
       Using treetop (1.4.15)
       Installing temple (0.6.7)
       Using mail (2.5.4)
       Installing atomic (1.1.15)
       Installing rack-protection (1.5.2)
       Installing slim (2.0.2)
       Installing http_router (0.11.1)
       Installing sinatra (1.4.4)
       Installing thread_safe (0.2.0)
       Installing activesupport (4.0.3)
       Installing activemodel (4.0.3)
       Installing padrino-core (0.12.0)
       Installing padrino-mailer (0.12.0)
       Installing padrino-gen (0.12.0)
       Installing padrino-helpers (0.12.0)
       Installing activerecord (4.0.3)
       Installing padrino-cache (0.12.0)
       Installing padrino-admin (0.12.0)
       Installing padrino (0.12.0)
       Your bundle is complete!
       Gems in the groups development and test were not installed.
       It was installed into ./vendor/bundle
       Bundle completed (18.14s)
       Cleaning up the bundler cache.
-----> Writing config/database.yml to read from DATABASE_URL
-----> WARNINGS:
       You have not declared a Ruby version in your Gemfile.
       To set your Ruby version add this line to your Gemfile:
       ruby '2.0.0'
       # See https://devcenter.heroku.com/articles/ruby-versions for more information.
-----> Discovering process types
       Procfile declares types -> (none)
       Default types for Ruby  -> console, rake, web

-----> Compressing... done, 16.1MB
-----> Launching... done, v6
       http://hello-world-heroku-postgres.herokuapp.com/ deployed to Heroku

To git@heroku.com:hello-world-heroku-postgres.git
 * [new branch]      master -> master

Now let's create a model:

$ padrino g model users name:string email:text
   apply  orms/activerecord
  create  models/users.rb
  create  db/migrate/001_create_users.rb

Before pushing our changes we need to run the migrations:

$ heroku run rake db:migrate
Running `rake db:migrate` attached to terminal... up, run.1057
==  CreateUsers: migrating ====================================================
-- create_table(:users)
   -> 0.0234s
==  CreateUsers: migrated (0.0236s) ===========================================

Now we need to create some data with the following query:

INSERT INTO users (name, email) VALUES ('Matthias', 'matthias@wikimatze.de');

Next we need to edit our view app/app.rb:

module HelloWorldHeroku
  class App < Padrino::Application
    ...
    get "/" do
      user = Users.find(1)
      "Hello #{user.name}\n Your email is: #{user.email}"
    end
  end
end

After pushing the changes, you can call http://hello-world-heroku-postgres.herokuapp.com and see the lovely output.


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