Schedule Heroku Dyno Restarts

scheduler.rake

# Credit goes to Jon Archer for this: http://www.jonarcher.com/2016/08/scheduled-heroku-dyno-restarts.html
#
# SETUP
# =====
#
# Create new rake task:
# $ rails generate task scheduler restart
#
# Install the Heroku oauth plugin:
# $ heroku plugins:install heroku-cli-oauth
#
# Create a new authorization token:
# $ heroku authorizations:create -d "Restart Scheduler API Token"
# Creating OAuth Authorization... done
# Client:      <none>
# ID:          377160e8-<removed>
# Description: Restart Scheduler API Token
# Scope:       global
# Token:       453c1322-<removed> <--- Authorization Token.
# Updated at:  Thu Jun 21 2018 10:40:10 GMT+1000 (Australian Eastern Standard Time) (less than a minute ago)
#
# Use the new authorization token above in the below code:

require 'net/http'
require 'uri'

namespace :scheduler do
  desc "Restart the Heroku production dynos"
  task :restart do
    uri = URI.parse("https://api.heroku.com/apps/<YOUR_DYNO_NAME>/dynos")
    request = Net::HTTP::Delete.new(uri)
    request.content_type = "application/json"
    request["Accept"] = "application/vnd.heroku+json; version=3"
    request["Authorization"] = "Bearer 453c1322-<removed>" # <--- Put your Authorization Token here.

    req_options = {
      use_ssl: uri.scheme == "https",
    }
    puts "Sending app dyno restart command..."
    response = Net::HTTP.start(uri.hostname, uri.port, req_options) do |http|
      http.request(request)
    end
    puts "Response Status: #{response.code}, Message: #{response.message}"
    puts "Dyno restart command sent."
  end
end

# Create a Heroku Scheduler task running - rails scheduler:restart, to perform this restart at a time you prefer.