Module: Wombat::Aws

Includes:
Common
Included in:
LatestRunner
Defined in:
lib/wombat/aws.rb

Instance Method Summary collapse

Methods included from Common

#audio?, #azure_provider_tag, #banner, #bootstrap_aws, #build_nodes, #calculate_templates, #conf, #connect_azure, #create_infranodes_json, #create_resource_group, #deployment_state, #duration, #follow_azure_deployment, #info, #infranodes, #is_mac?, #is_valid_json?, #linux, #list_outstanding_deployment_operations, #lock, #logs, #parse_log, #update_lock, #update_template, #warn, #wombat, #workstations

Instance Method Details

#find_latest_amis ⇒ Object 



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# File 'lib/wombat/aws.rb', line 12

def find_latest_amis
  client = ::Aws::EC2::Client.new(:region => wombat["aws"]["region"])
  # static list of images
  desc_hash = {
    "ubuntu-16.04" => ["ubuntu/images/hvm-ssd/ubuntu-xenial-16.04-amd64-server-*", "099720109477"],
    "ubuntu-14.04" => ["ubuntu/images/hvm-ssd/ubuntu-trusty-14.04-amd64-server-*", "099720109477"],
    "centos-7" => ["CentOS Linux 7 x86_64 HVM EBS*", "679593333241"],
    "windows-2012r2" => ["Windows_Server-2012-R2_RTM-English-64Bit-Base-*", "801119661308"]
  }
  desc_hash.each do |k, v|
    resp = client.describe_images({
      dry_run: false,
      filters: [
        {
          name: "name",
          values: [v[0]],
        },
        {
          name: "owner-id",
          values: [v[1]],
        },
      ],
    })
    images = sort_images(resp.images)

    puts "#{k}: #{images[:image_id]}"

  end
end

#prefer(images, &block) ⇒ Object 



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# File 'lib/wombat/aws.rb', line 42

def prefer(images, &block)
  # Put the matching ones *before* the non-matching ones.
  matching, non_matching = images.partition(&block)
  matching + non_matching
end

#sort_images(images) ⇒ Object 



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# File 'lib/wombat/aws.rb', line 48

def sort_images(images)
  # P5: We prefer more recent images over older ones
  images = images.sort_by(&:creation_date).reverse
  # P4: We prefer x86_64 over i386 (if available)
  images = prefer(images) { |image| image.architecture == :x86_64 }
  # P3: We prefer gp2 (SSD) (if available)
  images = prefer(images) do |image|
    image.block_device_mappings.any? do |b|
      b.device_name == image.root_device_name && b.ebs && b.ebs.volume_type == "gp2"
    end
  end
  # P2: We prefer ebs over instance_store (if available)
  images = prefer(images) { |image| image.root_device_type == "ebs" }
  # P1: We prefer hvm (the modern standard)
  images = prefer(images) { |image| image.virtualization_type == "hvm" }
  # Grab the image from the top of the stack
  images.first
end