AWS SDK Version 3 for .NET
API Reference

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Modifies the status of an Amazon ECS container instance.

You can change the status of a container instance to DRAINING to manually remove an instance from a cluster, for example to perform system updates, update the Docker daemon, or scale down the cluster size.

When you set a container instance to DRAINING, Amazon ECS prevents new tasks from being scheduled for placement on the container instance and replacement service tasks are started on other container instances in the cluster if the resources are available. Service tasks on the container instance that are in the PENDING state are stopped immediately.

Service tasks on the container instance that are in the RUNNING state are stopped and replaced according to the service's deployment configuration parameters, minimumHealthyPercent and maximumPercent. You can change the deployment configuration of your service using UpdateService.

Any PENDING or RUNNING tasks that do not belong to a service are not affected; you must wait for them to finish or stop them manually.

A container instance has completed draining when it has no more RUNNING tasks. You can verify this using ListTasks.

When you set a container instance to ACTIVE, the Amazon ECS scheduler can begin scheduling tasks on the instance again.


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

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


public virtual UpdateContainerInstancesStateResponse UpdateContainerInstancesState(
         UpdateContainerInstancesStateRequest request
Type: Amazon.ECS.Model.UpdateContainerInstancesStateRequest

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

Return Value
The response from the UpdateContainerInstancesState 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.

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