You can divide an application into different microservices. Each microservice is composed of a group of containers  with the same images and configurations, provides the atomic function, and connects with each other.

The preceding microservice is known as a service in Container Service. One or more services constitute an application in Container Service.

To manage applications by using containers, create an application with an image or an orchestration template first.  The application created with an image is composed of one service. The application created with an orchestration template is composed of one or more services specified by the orchestration template.