You can delete clusters from the Container Service. When you delete a cluster, the associated cloud resources such as ECS instances and Server Load Balancer instances as well as all the applications and services running on the instances will also be deleted. Use this operation with due care.
Log on to the Container Service console.
Click Clusters in the left navigation pane.
Locate the cluster to be deleted and click Delete.
In the pop-up dialog box, select whether to keep the Server Load Balancer instances and click OK.