server.rb

require 'sinatra'
require 'json'
require 'droplet_kit'

DO_TOKEN = 'YOUR_TOKEN'
DATA_JSON_FILE = './data.json'

set :bind, '0.0.0.0'

def do_client
  @do_client ||= DropletKit::Client.new(access_token: DO_TOKEN)
end

get '/:id' do
  unless File.exist?(DATA_JSON_FILE)
    File.open(DATA_JSON_FILE, 'w') { |f| f.write({}.to_json) }
  end
  data = JSON.parse(File.read(DATA_JSON_FILE))

  id = params[:id]
  # FIXME: super demo mode
  if id == '2' && data.has_key?(id) && data.has_key?('1')
    dock(data[id], data['1'])
  else
    built = register_new_figure
    data[id] = built
    File.open(DATA_JSON_FILE, 'w') { |f| f.write(data.to_json) }
  end

  'Done.'
end

def register_new_figure
  puts 'Type? (1: instance, 2: container)'
  type = gets.to_i
  type == 1 ? register_new_instance : register_new_container
end

def register_new_instance
  puts 'Name?'
  name = gets.chomp
  puts 'OS? (1: CoreOS)'
  gets
  puts 'Region? (1: SF)'
  gets
  puts 'Memory? (1: 512MB)'
  gets
  droplet = DropletKit::Droplet.new(
    name: name,
    region: 'sfo1',
    image: 'coreos-stable',
    size: '512mb',
    ssh_keys: [496296],
  )
  created = do_client.droplets.create(droplet)
  { type: 'instance', name: name, instance_id: created[:id] }
end

def register_new_container
  puts 'Image?'
  image = gets.chomp
  puts 'Run Command?'
  cmd = gets.chomp
  { type: 'container', image: image, run_command: cmd }
end

def dock(container, instance)
  puts "Deploying container #{container['name']}..."
  droplet = do_client.droplets.find(id: instance['instance_id'])
  ip = droplet[:networks][:v4][0][:ip_address]
  run_command = container['run_command']
  image = container['image']
  system("ssh core@#{ip} #{run_command} #{image}")
end

Join