全てのEC2インスタンスのDNS名とタグ表示

show_ec2_dnsname_and_tags.rb

gem 'aws-sdk'
require 'rubygems'
require 'aws-sdk'

ec2 = AWS::EC2.new(:access_key_id => nil, 
　　　　　　　　　　　:secret_access_key => nil,
                   :proxy_uri      => ENV['HTTPS_PROXY'] || ENV['https_proxy'] || ENV['HTTP_PROXY'] || ENV['http_proxy'])
ec2 = ec2.regions['ap-northeast-1']
ec2.instances.each do |x|
  puts x.dns_name
  x.tags.each do |tag|
    puts "\t#{tag[0]}, #{tag[1]}"
  end
end