describe-amazon-linux-images-v1.rb

#!/usr/bin/env ruby

require "aws-sdk-v1"
require "json"

ami_list = { "AWSAmazonLinuxAMI" => {} }
AWS.regions.each do |region|
  #next unless region.name == "ap-northeast-1"
  AWS.config(:region => region.name)
  ec2 = AWS::EC2.new
  latest_ver_of = {}
  latest_images = {}

  images = ec2.images.with_owner(:amazon).
           filter("state", "available").
           filter("image-type", "machine").
           filter("root-device-type", "ebs").
           filter("architecture", "x86_64").
           filter("virtualization-type", "hvm").
           filter("name", "amzn-ami*")
  images.each do |image|
    next if image.platform == "windows"
    next if image.name.include?("minimal")
    next if image.name.include?("-pv-")
    next if image.name.include?("vpc-nat")
    next unless image.name.include?("gp2")

    vers = []
    begin
      vers = image.name.match(/(\d+)\.(\d+)\.(\d+)/).to_a
    rescue => e
      $stderr.puts e
    end
    ami_majorver = vers.values_at(1,2).join
    ami_minorver = vers.values_at(1,2,3).join
    if latest_ver_of[ami_majorver].nil? || ami_minorver > latest_ver_of[ami_majorver]
      latest_images[ami_majorver] = image.image_id
      latest_ver_of[ami_majorver] = ami_minorver
    end
  end

  ami_list["AWSAmazonLinuxAMI"][region.name] = Hash[latest_images.sort]
end

puts JSON.dump(ami_list)