# File lib/fog/aws/models/compute/spot_request.rb, line 37
        def initialize(attributes={})
          self.groups ||= ["default"]
          self.flavor_id ||= 't1.micro'
          self.image_id   ||= begin
            self.username = 'ubuntu'
            case attributes[:connection].instance_variable_get(:@region) # Ubuntu 10.04 LTS 64bit (EBS)
            when 'ap-northeast-1'
              'ami-5e0fa45f'
            when 'ap-southeast-1'
              'ami-f092eca2'
            when 'eu-west-1'
              'ami-3d1f2b49'
            when 'us-east-1'
              'ami-3202f25b'
            when 'us-west-1'
              'ami-f5bfefb0'
            end
          end
          super
        end