Heroku::Autoscale

Installation

# Gemfile
gem 'heroku-autoscale'

Usage (Rails 2.x)

# config/environment.rb
config.middleware.use Heroku::Autoscale,
  :username  => ENV["HEROKU_USERNAME"],
  :password  => ENV["HEROKU_PASSWORD"],
  :app_name  => ENV["HEROKU_APP_NAME"],
  :min_dynos => 2,
  :max_dynos => 5,
  :queue_wait_low  => 100,  # milliseconds
  :queue_wait_high => 5000, # milliseconds
  :min_frequency   => 10    # seconds

Usage (Rails 3 / Rack)

# config.ru
use Heroku::Autoscale,
  :username  => ENV["HEROKU_USERNAME"],
  :password  => ENV["HEROKU_PASSWORD"],
  :app_name  => ENV["HEROKU_APP_NAME"],
  :min_dynos => 2,
  :max_dynos => 5,
  :queue_wait_low  => 100,  # milliseconds
  :queue_wait_high => 5000, # milliseconds
  :min_frequency   => 10    # seconds

begin require 'heroku/autoscale/dyno/rack'

config.middleware.use Heroku::Autoscale::Dyno::Rack, :username => ENV["HEROKU_USERNAME"], :password => ENV["HEROKU_PASSWORD"], :app_name => ENV["HEROKU_APP_NAME"], :min_dynos => 1, :max_dynos => 10, :queue_wait_low => 100, # milliseconds :queue_wait_high => 1000 # milliseconds rescue LoadError => e puts "*********** COULDNT LOAD DYNO AUTOSCALING ***********" end

config.after_initialize do begin require 'delayed_job'

Delayed::Worker.guess_backend

require 'heroku/autoscale/worker/delayed_job'

Heroku::Autoscale::Worker::DelayedJob.configure(
  :username         => ENV["HEROKU_USERNAME"],
  :password         => ENV["HEROKU_PASSWORD"],
  :app_name         => ENV["HEROKU_APP_NAME"],
  :min_workers      => 0,
  :max_workers      => 10,
  :queue_depth_low  => 0,
  :queue_depth_high => 1
)

rescue LoadError => e puts "*********** COULDNT LOAD WORKER AUTOSCALING ***********" end end