<!-- Code generated from the comments of the RunConfig struct in builder/alicloud/ecs/run_config.go; DO NOT EDIT MANUALLY -->

- `instance_type` (string) - Type of the instance. For values, see [Instance Type
  Table](https://www.alibabacloud.com/help/doc-detail/25378.htm?spm=a3c0i.o25499en.a3.9.14a36ac8iYqKRA).
  You can also obtain the latest instance type table by invoking the
  [Querying Instance Type
  Table](https://intl.aliyun.com/help/doc-detail/25620.htm?spm=a3c0i.o25499en.a3.6.Dr1bik)
  interface.

- `source_image` (string) - This is the base image id which you want to
  create your customized images.