# File lib/ec2/right_ec2_instances.rb, line 193
    def launch_instances(image_id, options={})
      @logger.info("Launching instance of image #{image_id} for #{@aws_access_key_id}, " +
                   "key: #{options[:key_name]}, groups: #{Array(options[:group_ids]).join(',')}")
      options[:image_id]    = image_id
      options[:min_count] ||= 1
      options[:max_count] ||= options[:min_count]
      params = prepare_instance_launch_params(options)
      link = generate_request("RunInstances", params)
      instances = request_info(link, QEc2DescribeInstancesParser.new(:logger => @logger))
      get_desc_instances(instances)
    rescue Exception
      on_exception
    end