Amazon ECS service quotas

The following table provides the default service quotas, also referred to as limits, for Amazon ECS for an AWS account. For more information on the service quotas for other AWS services that you can use with Amazon ECS, such as Elastic Load Balancing and Auto Scaling, see AWS service quotas in the Amazon Web Services General Reference.

Adjustable service quotas

The following service quotas are adjustable.

To request a quota increase, see Requesting a quota increase in the Service Quotas User Guide.

Service quota	Description	Default quota value
Clusters per account	The maximum number of clusters per Region, per account.	10,000
Container instances per cluster	The maximum number of container instances per cluster.	2,000
Services per cluster	The maximum number of services per cluster.	1,000
Tasks using the EC2 launch type per service (the desired count)	The maximum number of tasks using the EC2 launch type per service (the desired count). This limit applies to both standalone tasks and tasks launched as part of a service.	1,000
Tasks using the Fargate launch type or the FARGATE capacity provider, per Region, per account	The maximum number of tasks using the Fargate launch type or the FARGATE capacity provider, per Region. This limit applies to both standalone tasks and tasks launched as part of a service.	100
Fargate Spot tasks, per Region, per account	The maximum number of tasks using the FARGATE_SPOT capacity provider, per Region.	250
Public IP addresses for tasks using the Fargate launch type	The maximum number of public IP addresses used by tasks using the Fargate launch type, per Region.	100

Nonadjustable service quotas

The following are other limitations for Amazon ECS that cannot be changed.

Note

The quotas for Fargate task storage are nonadjustable and are dependent on the platform version used by the task. For more information, see Fargate Task Storage.

Service quota	Description	Default quota value
Tasks launched (count) per run-task	The maximum number of tasks that can be launched per RunTask API action.	10
Container instances per start-task	The maximum number of container instances specified in a StartTask API action.	10
Revisions per task definition family	The maximum number of revisions per task definition family. Deregistering a task definition revision does not exclude it from being included in this limit.	1,000,000
Task definition size limit	The maximum size, in KiB, of a task definition.	32
Task definition max containers	The maximum number of containers definitions within a a task definition.	10
Subnets specified in an awsvpcConfiguration	The maximum number of subnets specified within an awsvpcConfiguration.	16
Security groups specified in an awsvpcConfiguration	The maximum number of security groups specified within an awsvpcConfiguration.	5
Target groups per service	The maximum number of target groups per service, if using an Application Load Balancer or a Network Load Balancer.	5
Classic Load Balancers per service	The maximum number of Classic Load Balancers per service.	1
Tags per resource	The maximum number of tags per resource. This applies to tasks, services, task definitions, clusters, and container instances.	50

Using Service Quotas

Amazon Elastic Container Service (Amazon ECS) has integrated with Service Quotas, an AWS service that enables you to view and manage your quotas from a central location. Service quotas are also referred to as limits. For more information, see What Is Service Quotas? in the Service Quotas User Guide.

Service Quotas makes it easy to look up the value of all of the Amazon ECS service quotas.

To view Amazon ECS service quotas (AWS Management Console)

1. Open the Service Quotas console at https://console.aws.amazon.com/servicequotas/.

2. In the navigation pane, choose AWS services.

3. From the AWS services list, search for and select Amazon Elastic Container Service (Amazon ECS).

   In the Service quotas list, you can see the service quota name, applied value (if it is available), AWS default quota, and whether the quota value is adjustable.

4. To view additional information about a service quota, such as the description, choose the quota name.

To request a quota increase, see Requesting a Quota Increase in the Service Quotas User Guide.