# File lib/fog/aws/requests/auto_scaling/create_launch_configuration.rb, line 74
        def create_launch_configuration(image_id, instance_type, launch_configuration_name, options = {})
          if data[:launch_configurations].has_key?(launch_configuration_name)
            raise Fog::AWS::AutoScaling::IdentifierTaken.new("Launch Configuration by this name already exists - A launch configuration already exists with the name #{launch_configuration_name}")
          end
          data[:launch_configurations][launch_configuration_name] = {
            'BlockDeviceMappings'     => [],
            'CreatedTime'             => Time.now.utc,
            'ImageId'                 => image_id,
            'InstanceMonitoring'      => {'Enabled' => true},
            'InstanceType'            => instance_type,
            'KernelId'                => nil,
            'KeyName'                 => nil,
            'LaunchConfigurationARN'  => "arn:aws:autoscaling:eu-west-1:000000000000:launchConfiguration:00000000-0000-0000-0000-000000000000:launchConfigurationName/#{launch_configuration_name}",
            'LaunchConfigurationName' => launch_configuration_name,
            'RamdiskId'               => nil,
            'SecurityGroups'          => [],
            'UserData'                => nil
          }.merge!(options)

          response = Excon::Response.new
          response.status = 200
          response.body = {
            'ResponseMetadata' => { 'RequestId' => Fog::AWS::Mock.request_id }
          }
          response
        end