gistfile1.md

I wanted a way to scale up and down the dynos in Heroku based on time of day. To do so, I added the scheduler add-on to heroku heroku addons:add scheduler

In my Rails app, I added the scale_dynos.rake file in /lib/tasks/ and the following line to the Gemfile: gem 'heroku-api', '~> 0.3.17', :require => false

Now I can run heroku run rake scale_dynos:up (and down) through the command line, as well as scheduling the command rake scale_dynos:up in the Scheduler add-on. a

scale_dynos.rake

namespace :scale_dynos do
  require 'heroku-api'
  desc "Scale UP dynos"
  task :up do
    heroku = Heroku::API.new(:api_key => ENV['HEROKU_ACCOUNT_API_KEY'])
    heroku.post_ps_scale(ENV['HEROKU_APP_NAME'], 'web', 2)
  end

  desc "Scale DOWN dynos"
  task :down do
    heroku = Heroku::API.new(:api_key => ENV['HEROKU_ACCOUNT_API_KEY'])
    heroku.post_ps_scale(ENV['HEROKU_APP_NAME'], 'web', 1)
  end

end