インスタンス一覧とTagからNameな物を出力するだけ

list-ec2-instances.rb

require 'rubygems'
require 'yaml'
require 'aws-sdk'

AWS.config({
    :access_key_id => 'XXXXXXXXXXXXXXXXXXXXXXX',
    :secret_access_key => 'XXXXXXXXXXXXXXXXXXXXXXX',
    :ec2_endpoint => 'ec2.ap-northeast-1.amazonaws.com'
})

ec2 = AWS::EC2.new

ec2.instances.each { |instance|
    puts "#{instance.id}, #{instance.image_id}, #{instance.status}, #{instance.tags["Name"]}"
}