ec2_tags.rb

#Fact : ec2_tags
#
#Purpose : To provide the ec2_tags of an instance.
#
#Resolution : Retrieve the ec2_tags for the instance by querying the machine. 
#
#

Facter.add(:ec2_tags) do

  confine do
    begin
      require 'aws-sdk-core'
      true
    rescue LoadError
      false
    end

  end

  confine do
    Facter.value(:ec2_metadata)['iam']['info']
  end

  setcode do
    Aws.use_bundled_cert!
    instance_id = Facter.value('ec2_metadata')['instance-id']
    region = Facter.value(:ec2_metadata)['placement']['availability-zone'][0..-2]
    ec2 = Aws::EC2::Client.new(region: region)
    instance = ec2.describe_instances(instance_ids: [instance_id])
    tags = instance.reservations[0].instances[0].tags
    taghash = { }
    tags.each do |tag|
      taghash[tag['key'].downcase] = tag['value'].downcase
    end
    taghash
  end
end