<!-- 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.
    