Resource Orchestration Service (ROS) is a service provided by Alibaba Cloud to simplify the management of cloud computing resources. You can author stack templates based on the template specifications defined in ROS. Within a template, you can define required cloud computing resources such as ECS and ApsaraDB for RDS instances, and the dependencies between resources. The ROS engine automatically creates and configures all resources in a stack based on a template, making automatic deployment and O&M possible.

An ROS template is a readable, easy-to-author text file. You can directly edit a JSON-formatted template or use the Visual Editor available in the ROS console to edit the template. You can modify templates at any time. You can use version control tools such as SVN and Git to control the template and infrastructure versions. You can use APIs and SDKs to integrate the orchestration capabilities of ROS with your own applications to implement infrastructure as code.

ROS templates are also a standardized way to deliver resources and applications. If you are an independent software vendor (ISV), you can use ROS templates to deliver a holistic system and solution encompassing cloud resources and applications. ISVs can use this method to integrate Alibaba Cloud resources with their own software systems for centralized delivery.

ROS manages a group of cloud resources as a single unit called a stack. A stack is a group of Alibaba Cloud resources. You can create, delete, and clone cloud resources by stack. In DevOps practices, you can use ROS to clone the development, testing, and production environments, as well as migrate and scale out applications.