Keep Heroku Free!

Heroku makes it easy to spin up a free new Rails application. The hard part is keeping it free! Here are a few tips and tricks to help you keep Heroku free for as long as possible.

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1. collectiveidea.com Keep Heroku Free! Steve Richert @laserlemon
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3. collectiveidea.com 1. Web Server
4. collectiveidea.com WEBrick
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6. collectiveidea.com # Gemfile ! gem "unicorn"
7. collectiveidea.com # Procfile ! web: bundle exec unicorn -p $PORT -c ./config/unicorn.rb
8. collectiveidea.com # config/unicorn.rb ! worker_processes Integer(ENV["WEB_CONCURRENCY"] || 3) timeout 15 preload_app true ! before_fork do |server, worker| Signal.trap "TERM" do puts "Unicorn master receiving TERM and sending QUIT instead" Process.kill "QUIT", Process.pid end ! if defined? ActiveRecord::Base ActiveRecord::Base.connection.disconnect! end end ! after_fork do |server, worker| Signal.trap "TERM" do puts "Unicorn worker receiving TERM but waiting for master to send QUIT" end ! if defined? ActiveRecord::Base ActiveRecord::Base.establish_connection end end
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10. collectiveidea.com # Gemfile ! gem "puma"
11. collectiveidea.com # Procfile ! web: bundle exec bundle exec puma -C config/puma.rb
12. collectiveidea.com # config/puma.rb ! workers Integer(ENV["PUMA_WORKERS"] || 3) threads Integer(ENV["MIN_THREADS"] || 1), Integer(ENV["MAX_THREADS"] || 16) ! preload_app! ! rackup DefaultRackup port ENV["PORT"] || 3000 environment ENV["RACK_ENV"] || "development" ! on_worker_boot do ActiveSupport.on_load(:active_record) do config = ActiveRecord::Base.configurations[Rails.env] || Rails.application.config.database_configuration[Rails.env] config["pool"] = ENV["MAX_THREADS"] || 16 ActiveRecord::Base.establish_connection(config) end end
13. collectiveidea.com 2. Background Jobs
14. collectiveidea.com Delayed Job Resque Sidekiq
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16. collectiveidea.com Sucker Punch
17. collectiveidea.com # Gemfile ! gem "sucker_punch"
18. collectiveidea.com # app/controllers/users_controller.rb ! def create @user = User.new(params[:user]) ! if @user.save Notifier.welcome(@user).deliver redirect_to @user else render :new end end
19. collectiveidea.com # app/controllers/users_controller.rb ! def create @user = User.new(params[:user]) ! if @user.save WelcomeJob.new.async.perform(@user) redirect_to @user else render :new end end
20. collectiveidea.com # app/jobs/welcome_job.rb ! class WelcomeJob include SuckerPunch::Job ! def perform(user) Notifier.welcome(user).deliver end end
21. collectiveidea.com 3. Email Delivery
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23. collectiveidea.com Mandrill
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25. collectiveidea.com 4. Monitoring
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27. collectiveidea.com # Gemfile ! gem "newrelic_rpm"
28. collectiveidea.com $ heroku addons:add newrelic:stark $ heroku addons:docs newrelic
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30. collectiveidea.com One more thing…
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32. collectiveidea.com Honorable Mention • Amazon CloudFront CDN • Heroku PostgreSQL row limits
33. collectiveidea.com Links • bit.ly/free-heroku-slides • bit.ly/free-heroku-blog-post • bit.ly/free-heroku-unicorn • bit.ly/free-heroku-puma • bit.ly/free-heroku-sucker-punch • bit.ly/free-heroku-cloudfront • mandrill.com • newrelic.com