AWS SDK Version 3 for .NET
API Reference

AWS services or capabilities described in AWS Documentation may vary by region/location. Click Getting Started with Amazon AWS to see specific differences applicable to the China (Beijing) Region.

Deregisters an Amazon ECS container instance from the specified cluster. This instance is no longer available to run tasks.

If you intend to use the container instance for some other purpose after deregistration, you should stop all of the tasks running on the container instance before deregistration. That prevents any orphaned tasks from consuming resources.

Deregistering a container instance removes the instance from a cluster, but it does not terminate the EC2 instance; if you are finished using the instance, be sure to terminate it in the Amazon EC2 console to stop billing.

If you terminate a running container instance, Amazon ECS automatically deregisters the instance from your cluster (stopped container instances or instances with disconnected agents are not automatically deregistered when terminated).


For .NET Core and PCL this operation is only available in asynchronous form. Please refer to DeregisterContainerInstanceAsync.

Namespace: Amazon.ECS
Assembly: AWSSDK.ECS.dll
Version: 3.x.y.z


public virtual DeregisterContainerInstanceResponse DeregisterContainerInstance(
         DeregisterContainerInstanceRequest request
Type: Amazon.ECS.Model.DeregisterContainerInstanceRequest

Container for the necessary parameters to execute the DeregisterContainerInstance service method.

Return Value
The response from the DeregisterContainerInstance service method, as returned by ECS.


ClientException These errors are usually caused by a client action, such as using an action or resource on behalf of a user that doesn't have permissions to use the action or resource, or specifying an identifier that is not valid.
ClusterNotFoundException The specified cluster could not be found. You can view your available clusters with ListClusters. Amazon ECS clusters are region-specific.
InvalidParameterException The specified parameter is invalid. Review the available parameters for the API request.
ServerException These errors are usually caused by a server issue.


This example deregisters a container instance from the specified cluster in your default region. If there are still tasks running on the container instance, you must either stop those tasks before deregistering, or use the force option.

To deregister a container instance from a cluster

var response = client.DeregisterContainerInstance(new DeregisterContainerInstanceRequest 
    Cluster = "default",
    ContainerInstance = "container_instance_UUID",
    Force = true


Version Information

.NET Framework:
Supported in: 4.5, 4.0, 3.5

Portable Class Library:
Supported in: Windows Store Apps
Supported in: Windows Phone 8.1
Supported in: Xamarin Android
Supported in: Xamarin iOS (Unified)
Supported in: Xamarin.Forms

See Also