gem build MovableInkAWS.gemspec
s3cmd put -P MovableInkAWS-<VERSION>.gem s3://movableink-chef/MovableInkAWS/
gem install ./MovableInkAWS-<VERSION>.gem
require 'movable_ink/aws'
miaws = MovableInk::AWS.new
miaws.datacenter
miaws.instance_ip_addresses_by_role(role: 'varnish').map { |m| "http://#{m}:8080" }
...