How to schedule heroku prcesses.

heroku_scaler.rake

# encoding: utf-8

require 'heroku-api'

namespace :heroku do

  desc "Scale down the processes during business hours"
  task :spin_down => :environment do
    app = ENV['HEROKU_APP']
    heroku = Heroku::API.new(:api_key => ENV['HEROKU_API_KEY'])
    heroku.put_formation(app, 'web' => '1X')
    heroku.post_ps_scale(app, 'web', 1)
  end

  desc "Scale down the processes during none business hours"
  task :spin_up => :environment do
    if [1,2,3,4,5].include?(Date.today.wday)
      app = ENV['HEROKU_APP']
      heroku = Heroku::API.new(:api_key => ENV['HEROKU_API_KEY'])
      heroku.put_formation(app, 'web' => '2X')
      heroku.post_ps_scale(app, 'web', ENV['HEROKU_WORK_HOUR_DYNOS'].to_i)
    end
  end

end