AWS SDK Version 3 for .NET
API Reference

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Container for the parameters to the UpdateService operation. Modifies the desired count, deployment configuration, network configuration, or task definition used in a service.

You can add to or subtract from the number of instantiations of a task definition in a service by specifying the cluster that the service is running in and a new desiredCount parameter.

If you have updated the Docker image of your application, you can create a new task definition with that image and deploy it to your service. The service scheduler uses the minimum healthy percent and maximum percent parameters (in the service's deployment configuration) to determine the deployment strategy.

If your updated Docker image uses the same tag as what is in the existing task definition for your service (for example, my_image:latest), you do not need to create a new revision of your task definition. You can update the service using the forceNewDeployment option. The new tasks launched by the deployment pull the current image/tag combination from your repository when they start.

You can also update the deployment configuration of a service. When a deployment is triggered by updating the task definition of a service, the service scheduler uses the deployment configuration parameters, minimumHealthyPercent and maximumPercent, to determine the deployment strategy.

When UpdateService stops a task during a deployment, the equivalent of

is issued to the containers running in the task. This results in a SIGTERM and a 30-second timeout, after which SIGKILL is sent and the containers are forcibly stopped. If the container handles the SIGTERM gracefully and exits within 30 seconds from receiving it, no SIGKILL is sent.

When the service scheduler launches new tasks, it determines task placement in your cluster with the following logic:

When the service scheduler stops running tasks, it attempts to maintain balance across the Availability Zones in your cluster using the following logic:

Inheritance Hierarchy


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


public class UpdateServiceRequest : AmazonECSRequest

The UpdateServiceRequest type exposes the following members


Public Method UpdateServiceRequest()


Public Property Cluster System.String

Gets and sets the property Cluster.

The short name or full Amazon Resource Name (ARN) of the cluster that your service is running on. If you do not specify a cluster, the default cluster is assumed.

Public Property DeploymentConfiguration Amazon.ECS.Model.DeploymentConfiguration

Gets and sets the property DeploymentConfiguration.

Optional deployment parameters that control how many tasks run during the deployment and the ordering of stopping and starting tasks.

Public Property DesiredCount System.Int32

Gets and sets the property DesiredCount.

The number of instantiations of the task to place and keep running in your service.

Public Property ForceNewDeployment System.Boolean

Gets and sets the property ForceNewDeployment.

Whether to force a new deployment of the service. Deployments are not forced by default. You can use this option to trigger a new deployment with no service definition changes. For example, you can update a service's tasks to use a newer Docker image with the same image/tag combination (my_image:latest) or to roll Fargate tasks onto a newer platform version.

Public Property HealthCheckGracePeriodSeconds System.Int32

Gets and sets the property HealthCheckGracePeriodSeconds.

The period of time, in seconds, that the Amazon ECS service scheduler should ignore unhealthy Elastic Load Balancing target health checks after a task has first started. This is only valid if your service is configured to use a load balancer. If your service's tasks take a while to start and respond to Elastic Load Balancing health checks, you can specify a health check grace period of up to 1,800 seconds during which the ECS service scheduler ignores the Elastic Load Balancing health check status. This grace period can prevent the ECS service scheduler from marking tasks as unhealthy and stopping them before they have time to come up.

Public Property NetworkConfiguration Amazon.ECS.Model.NetworkConfiguration

Gets and sets the property NetworkConfiguration.

The network configuration for the service. This parameter is required for task definitions that use the awsvpc network mode to receive their own elastic network interface, and it is not supported for other network modes. For more information, see Task Networking in the Amazon Elastic Container Service Developer Guide.

Updating a service to add a subnet to a list of existing subnets does not trigger a service deployment. For example, if your network configuration change is to keep the existing subnets and simply add another subnet to the network configuration, this does not trigger a new service deployment.

Public Property PlatformVersion System.String

Gets and sets the property PlatformVersion.

The platform version that your service should run.

Public Property Service System.String

Gets and sets the property Service.

The name of the service to update.

Public Property TaskDefinition System.String

Gets and sets the property TaskDefinition.

The family and revision (family:revision) or full ARN of the task definition to run in your service. If a revision is not specified, the latest ACTIVE revision is used. If you modify the task definition with UpdateService, Amazon ECS spawns a task with the new version of the task definition and then stops an old task after the new version is running.


This example updates the my-http-service service to use the amazon-ecs-sample task definition.

To change the task definition used in a service

var response = client.UpdateService(new UpdateServiceRequest 
    Service = "my-http-service",
    TaskDefinition = "amazon-ecs-sample"


This example updates the desired count of the my-http-service service to 10.

To change the number of tasks in a service

var response = client.UpdateService(new UpdateServiceRequest 
    DesiredCount = 10,
    Service = "my-http-service"


Version Information

.NET Standard:
Supported in: 1.3

.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