original repository: https://github.com/forward3d/cap-ec2

• fixed YAML.load command in CapEC2::Utils#load_config
• require aws-sdk-ec2 instead of whole sdk
• fixed deployment in private subnet (private IP)

• add gem 'cap-ec2', git: 'https://github.com/bilendo/cap-ec2.git' to your Gemfile
• add require 'cap-ec2/capistrano' to your Capfile
• run bundle exec cap production ec2:status to view your instances

If you want to directly call cap stage <command> without the bundler prefix,
install the gem globally:

git clone git@github.com:bilendo/cap-ec2.git
cd cap-ec2
gem uninstall cap-ec2 # uninstall previous versions
gem build cap-ec2.gemspec
gem install cap-ec2-1.1.2.gem

Hint:
Make sure to select the right Ruby version.
Change the version of .ruby-version if you use rbenv.
If you use rvm – don't!