EBSボリュームと、それに紐付くEC2インスタンスの一覧を出力する

list-ebs-volume.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.volumes.each { |volume|
    instance_id = nil 
    volume.attachments.each {|attachment|
        instance_id = attachment.instance.id
    }   
    puts "#{volume.id},#{volume.tags["Name"]}, #{volume.status}, #{volume.size}GB => #{instance_id}"
}