Application Auto Scaling

2019/08/29 - Application Auto Scaling - 2 updated api methods

Changes  With the current release, you can suspend and later resume any of the following scaling actions in Application Auto Scaling: scheduled scaling actions, dynamic scaling in actions, dynamic scaling out actions.

DescribeScalableTargets (updated) Link ¶
Changes (response) 
{'ScalableTargets': {'SuspendedState': {'DynamicScalingInSuspended': 'boolean',
                                        'DynamicScalingOutSuspended': 'boolean',
                                        'ScheduledScalingSuspended': 'boolean'}}}

Gets information about the scalable targets in the specified namespace.

You can filter the results using ResourceIds and ScalableDimension .

To create a scalable target or update an existing one, see RegisterScalableTarget . If you are no longer using a scalable target, you can deregister it using DeregisterScalableTarget .

See also: AWS API Documentation

Request Syntax

client.describe_scalable_targets(
    ServiceNamespace='ecs'|'elasticmapreduce'|'ec2'|'appstream'|'dynamodb'|'rds'|'sagemaker'|'custom-resource',
    ResourceIds=[
        'string',
    ],
    ScalableDimension='ecs:service:DesiredCount'|'ec2:spot-fleet-request:TargetCapacity'|'elasticmapreduce:instancegroup:InstanceCount'|'appstream:fleet:DesiredCapacity'|'dynamodb:table:ReadCapacityUnits'|'dynamodb:table:WriteCapacityUnits'|'dynamodb:index:ReadCapacityUnits'|'dynamodb:index:WriteCapacityUnits'|'rds:cluster:ReadReplicaCount'|'sagemaker:variant:DesiredInstanceCount'|'custom-resource:ResourceType:Property',
    MaxResults=123,
    NextToken='string'
)
type ServiceNamespace

string

param ServiceNamespace

[REQUIRED]

The namespace of the AWS service that provides the resource or custom-resource for a resource provided by your own application or service. For more information, see AWS Service Namespaces in the Amazon Web Services General Reference .

type ResourceIds

list

param ResourceIds

The identifier of the resource associated with the scalable target. This string consists of the resource type and unique identifier. If you specify a scalable dimension, you must also specify a resource ID.

  • ECS service - The resource type is service and the unique identifier is the cluster name and service name. Example: service/default/sample-webapp .

  • Spot Fleet request - The resource type is spot-fleet-request and the unique identifier is the Spot Fleet request ID. Example: spot-fleet-request/sfr-73fbd2ce-aa30-494c-8788-1cee4EXAMPLE .

  • EMR cluster - The resource type is instancegroup and the unique identifier is the cluster ID and instance group ID. Example: instancegroup/j-2EEZNYKUA1NTV/ig-1791Y4E1L8YI0 .

  • AppStream 2.0 fleet - The resource type is fleet and the unique identifier is the fleet name. Example: fleet/sample-fleet .

  • DynamoDB table - The resource type is table and the unique identifier is the resource ID. Example: table/my-table .

  • DynamoDB global secondary index - The resource type is index and the unique identifier is the resource ID. Example: table/my-table/index/my-table-index .

  • Aurora DB cluster - The resource type is cluster and the unique identifier is the cluster name. Example: cluster:my-db-cluster .

  • Amazon SageMaker endpoint variants - The resource type is variant and the unique identifier is the resource ID. Example: endpoint/my-end-point/variant/KMeansClustering .

  • Custom resources are not supported with a resource type. This parameter must specify the OutputValue from the CloudFormation template stack used to access the resources. The unique identifier is defined by the service provider. More information is available in our GitHub repository .

  • (string) --

type ScalableDimension

string

param ScalableDimension

The scalable dimension associated with the scalable target. This string consists of the service namespace, resource type, and scaling property. If you specify a scalable dimension, you must also specify a resource ID.

  • ecs:service:DesiredCount - The desired task count of an ECS service.

  • ec2:spot-fleet-request:TargetCapacity - The target capacity of a Spot Fleet request.

  • elasticmapreduce:instancegroup:InstanceCount - The instance count of an EMR Instance Group.

  • appstream:fleet:DesiredCapacity - The desired capacity of an AppStream 2.0 fleet.

  • dynamodb:table:ReadCapacityUnits - The provisioned read capacity for a DynamoDB table.

  • dynamodb:table:WriteCapacityUnits - The provisioned write capacity for a DynamoDB table.

  • dynamodb:index:ReadCapacityUnits - The provisioned read capacity for a DynamoDB global secondary index.

  • dynamodb:index:WriteCapacityUnits - The provisioned write capacity for a DynamoDB global secondary index.

  • rds:cluster:ReadReplicaCount - The count of Aurora Replicas in an Aurora DB cluster. Available for Aurora MySQL-compatible edition and Aurora PostgreSQL-compatible edition.

  • sagemaker:variant:DesiredInstanceCount - The number of EC2 instances for an Amazon SageMaker model endpoint variant.

  • custom-resource:ResourceType:Property - The scalable dimension for a custom resource provided by your own application or service.

type MaxResults

integer

param MaxResults

The maximum number of scalable targets. This value can be between 1 and 50. The default value is 50.

If this parameter is used, the operation returns up to MaxResults results at a time, along with a NextToken value. To get the next set of results, include the NextToken value in a subsequent call. If this parameter is not used, the operation returns up to 50 results and a NextToken value, if applicable.

type NextToken

string

param NextToken

The token for the next set of results.

rtype

dict

returns

Response Syntax

{
    'ScalableTargets': [
        {
            'ServiceNamespace': 'ecs'|'elasticmapreduce'|'ec2'|'appstream'|'dynamodb'|'rds'|'sagemaker'|'custom-resource',
            'ResourceId': 'string',
            'ScalableDimension': 'ecs:service:DesiredCount'|'ec2:spot-fleet-request:TargetCapacity'|'elasticmapreduce:instancegroup:InstanceCount'|'appstream:fleet:DesiredCapacity'|'dynamodb:table:ReadCapacityUnits'|'dynamodb:table:WriteCapacityUnits'|'dynamodb:index:ReadCapacityUnits'|'dynamodb:index:WriteCapacityUnits'|'rds:cluster:ReadReplicaCount'|'sagemaker:variant:DesiredInstanceCount'|'custom-resource:ResourceType:Property',
            'MinCapacity': 123,
            'MaxCapacity': 123,
            'RoleARN': 'string',
            'CreationTime': datetime(2015, 1, 1),
            'SuspendedState': {
                'DynamicScalingInSuspended': True|False,
                'DynamicScalingOutSuspended': True|False,
                'ScheduledScalingSuspended': True|False
            }
        },
    ],
    'NextToken': 'string'
}

Response Structure

  • (dict) --

    • ScalableTargets (list) --

      The scalable targets that match the request parameters.

      • (dict) --

        Represents a scalable target.

        • ServiceNamespace (string) --

          The namespace of the AWS service that provides the resource or custom-resource for a resource provided by your own application or service. For more information, see AWS Service Namespaces in the Amazon Web Services General Reference .

        • ResourceId (string) --

          The identifier of the resource associated with the scalable target. This string consists of the resource type and unique identifier.

          • ECS service - The resource type is service and the unique identifier is the cluster name and service name. Example: service/default/sample-webapp .

          • Spot Fleet request - The resource type is spot-fleet-request and the unique identifier is the Spot Fleet request ID. Example: spot-fleet-request/sfr-73fbd2ce-aa30-494c-8788-1cee4EXAMPLE .

          • EMR cluster - The resource type is instancegroup and the unique identifier is the cluster ID and instance group ID. Example: instancegroup/j-2EEZNYKUA1NTV/ig-1791Y4E1L8YI0 .

          • AppStream 2.0 fleet - The resource type is fleet and the unique identifier is the fleet name. Example: fleet/sample-fleet .

          • DynamoDB table - The resource type is table and the unique identifier is the resource ID. Example: table/my-table .

          • DynamoDB global secondary index - The resource type is index and the unique identifier is the resource ID. Example: table/my-table/index/my-table-index .

          • Aurora DB cluster - The resource type is cluster and the unique identifier is the cluster name. Example: cluster:my-db-cluster .

          • Amazon SageMaker endpoint variants - The resource type is variant and the unique identifier is the resource ID. Example: endpoint/my-end-point/variant/KMeansClustering .

          • Custom resources are not supported with a resource type. This parameter must specify the OutputValue from the CloudFormation template stack used to access the resources. The unique identifier is defined by the service provider. More information is available in our GitHub repository .

        • ScalableDimension (string) --

          The scalable dimension associated with the scalable target. This string consists of the service namespace, resource type, and scaling property.

          • ecs:service:DesiredCount - The desired task count of an ECS service.

          • ec2:spot-fleet-request:TargetCapacity - The target capacity of a Spot Fleet request.

          • elasticmapreduce:instancegroup:InstanceCount - The instance count of an EMR Instance Group.

          • appstream:fleet:DesiredCapacity - The desired capacity of an AppStream 2.0 fleet.

          • dynamodb:table:ReadCapacityUnits - The provisioned read capacity for a DynamoDB table.

          • dynamodb:table:WriteCapacityUnits - The provisioned write capacity for a DynamoDB table.

          • dynamodb:index:ReadCapacityUnits - The provisioned read capacity for a DynamoDB global secondary index.

          • dynamodb:index:WriteCapacityUnits - The provisioned write capacity for a DynamoDB global secondary index.

          • rds:cluster:ReadReplicaCount - The count of Aurora Replicas in an Aurora DB cluster. Available for Aurora MySQL-compatible edition and Aurora PostgreSQL-compatible edition.

          • sagemaker:variant:DesiredInstanceCount - The number of EC2 instances for an Amazon SageMaker model endpoint variant.

          • custom-resource:ResourceType:Property - The scalable dimension for a custom resource provided by your own application or service.

        • MinCapacity (integer) --

          The minimum value to scale to in response to a scale-in event.

        • MaxCapacity (integer) --

          The maximum value to scale to in response to a scale-out event.

        • RoleARN (string) --

          The ARN of an IAM role that allows Application Auto Scaling to modify the scalable target on your behalf.

        • CreationTime (datetime) --

          The Unix timestamp for when the scalable target was created.

        • SuspendedState (dict) --

          Specifies whether the scaling activities for a scalable target are in a suspended state.

          • DynamicScalingInSuspended (boolean) --

            Whether scale in by a target tracking scaling policy or a step scaling policy is suspended. Set the value to true if you don't want Application Auto Scaling to remove capacity when a scaling policy is triggered. The default is false .

          • DynamicScalingOutSuspended (boolean) --

            Whether scale out by a target tracking scaling policy or a step scaling policy is suspended. Set the value to true if you don't want Application Auto Scaling to add capacity when a scaling policy is triggered. The default is false .

          • ScheduledScalingSuspended (boolean) --

            Whether scheduled scaling is suspended. Set the value to true if you don't want Application Auto Scaling to add or remove capacity by initiating scheduled actions. The default is false .

    • NextToken (string) --

      The token required to get the next set of results. This value is null if there are no more results to return.

RegisterScalableTarget (updated) Link ¶
Changes (request) 
{'SuspendedState': {'DynamicScalingInSuspended': 'boolean',
                    'DynamicScalingOutSuspended': 'boolean',
                    'ScheduledScalingSuspended': 'boolean'}}

Registers or updates a scalable target. A scalable target is a resource that Application Auto Scaling can scale out and scale in. Scalable targets are uniquely identified by the combination of resource ID, scalable dimension, and namespace.

When you register a new scalable target, you must specify values for minimum and maximum capacity. Application Auto Scaling will not scale capacity to values that are outside of this range.

To update a scalable target, specify the parameter that you want to change as well as the following parameters that identify the scalable target: resource ID, scalable dimension, and namespace. Any parameters that you don't specify are not changed by this update request.

After you register a scalable target, you do not need to register it again to use other Application Auto Scaling operations. To see which resources have been registered, use DescribeScalableTargets . You can also view the scaling policies for a service namespace by using DescribeScalableTargets .

If you no longer need a scalable target, you can deregister it by using DeregisterScalableTarget .

See also: AWS API Documentation

Request Syntax

client.register_scalable_target(
    ServiceNamespace='ecs'|'elasticmapreduce'|'ec2'|'appstream'|'dynamodb'|'rds'|'sagemaker'|'custom-resource',
    ResourceId='string',
    ScalableDimension='ecs:service:DesiredCount'|'ec2:spot-fleet-request:TargetCapacity'|'elasticmapreduce:instancegroup:InstanceCount'|'appstream:fleet:DesiredCapacity'|'dynamodb:table:ReadCapacityUnits'|'dynamodb:table:WriteCapacityUnits'|'dynamodb:index:ReadCapacityUnits'|'dynamodb:index:WriteCapacityUnits'|'rds:cluster:ReadReplicaCount'|'sagemaker:variant:DesiredInstanceCount'|'custom-resource:ResourceType:Property',
    MinCapacity=123,
    MaxCapacity=123,
    RoleARN='string',
    SuspendedState={
        'DynamicScalingInSuspended': True|False,
        'DynamicScalingOutSuspended': True|False,
        'ScheduledScalingSuspended': True|False
    }
)
type ServiceNamespace

string

param ServiceNamespace

[REQUIRED]

The namespace of the AWS service that provides the resource or custom-resource for a resource provided by your own application or service. For more information, see AWS Service Namespaces in the Amazon Web Services General Reference .

type ResourceId

string

param ResourceId

[REQUIRED]

The identifier of the resource that is associated with the scalable target. This string consists of the resource type and unique identifier.

  • ECS service - The resource type is service and the unique identifier is the cluster name and service name. Example: service/default/sample-webapp .

  • Spot Fleet request - The resource type is spot-fleet-request and the unique identifier is the Spot Fleet request ID. Example: spot-fleet-request/sfr-73fbd2ce-aa30-494c-8788-1cee4EXAMPLE .

  • EMR cluster - The resource type is instancegroup and the unique identifier is the cluster ID and instance group ID. Example: instancegroup/j-2EEZNYKUA1NTV/ig-1791Y4E1L8YI0 .

  • AppStream 2.0 fleet - The resource type is fleet and the unique identifier is the fleet name. Example: fleet/sample-fleet .

  • DynamoDB table - The resource type is table and the unique identifier is the resource ID. Example: table/my-table .

  • DynamoDB global secondary index - The resource type is index and the unique identifier is the resource ID. Example: table/my-table/index/my-table-index .

  • Aurora DB cluster - The resource type is cluster and the unique identifier is the cluster name. Example: cluster:my-db-cluster .

  • Amazon SageMaker endpoint variants - The resource type is variant and the unique identifier is the resource ID. Example: endpoint/my-end-point/variant/KMeansClustering .

  • Custom resources are not supported with a resource type. This parameter must specify the OutputValue from the CloudFormation template stack used to access the resources. The unique identifier is defined by the service provider. More information is available in our GitHub repository .

type ScalableDimension

string

param ScalableDimension

[REQUIRED]

The scalable dimension associated with the scalable target. This string consists of the service namespace, resource type, and scaling property.

  • ecs:service:DesiredCount - The desired task count of an ECS service.

  • ec2:spot-fleet-request:TargetCapacity - The target capacity of a Spot Fleet request.

  • elasticmapreduce:instancegroup:InstanceCount - The instance count of an EMR Instance Group.

  • appstream:fleet:DesiredCapacity - The desired capacity of an AppStream 2.0 fleet.

  • dynamodb:table:ReadCapacityUnits - The provisioned read capacity for a DynamoDB table.

  • dynamodb:table:WriteCapacityUnits - The provisioned write capacity for a DynamoDB table.

  • dynamodb:index:ReadCapacityUnits - The provisioned read capacity for a DynamoDB global secondary index.

  • dynamodb:index:WriteCapacityUnits - The provisioned write capacity for a DynamoDB global secondary index.

  • rds:cluster:ReadReplicaCount - The count of Aurora Replicas in an Aurora DB cluster. Available for Aurora MySQL-compatible edition and Aurora PostgreSQL-compatible edition.

  • sagemaker:variant:DesiredInstanceCount - The number of EC2 instances for an Amazon SageMaker model endpoint variant.

  • custom-resource:ResourceType:Property - The scalable dimension for a custom resource provided by your own application or service.

type MinCapacity

integer

param MinCapacity

The minimum value to scale to in response to a scale-in event. MinCapacity is required to register a scalable target.

type MaxCapacity

integer

param MaxCapacity

The maximum value to scale to in response to a scale-out event. MaxCapacity is required to register a scalable target.

type RoleARN

string

param RoleARN

Application Auto Scaling creates a service-linked role that grants it permissions to modify the scalable target on your behalf. For more information, see Service-Linked Roles for Application Auto Scaling .

For resources that are not supported using a service-linked role, this parameter is required, and it must specify the ARN of an IAM role that allows Application Auto Scaling to modify the scalable target on your behalf.

type SuspendedState

dict

param SuspendedState

An embedded object that contains attributes and attribute values that are used to suspend and resume automatic scaling. Setting the value of an attribute to true suspends the specified scaling activities. Setting it to false (default) resumes the specified scaling activities.

Suspension Outcomes

  • For DynamicScalingInSuspended , while a suspension is in effect, all scale-in activities that are triggered by a scaling policy are suspended.

  • For DynamicScalingOutSuspended , while a suspension is in effect, all scale-out activities that are triggered by a scaling policy are suspended.

  • For ScheduledScalingSuspended , while a suspension is in effect, all scaling activities that involve scheduled actions are suspended.

For more information, see Suspend and Resume Application Auto Scaling in the Application Auto Scaling User Guide .

  • DynamicScalingInSuspended (boolean) --

    Whether scale in by a target tracking scaling policy or a step scaling policy is suspended. Set the value to true if you don't want Application Auto Scaling to remove capacity when a scaling policy is triggered. The default is false .

  • DynamicScalingOutSuspended (boolean) --

    Whether scale out by a target tracking scaling policy or a step scaling policy is suspended. Set the value to true if you don't want Application Auto Scaling to add capacity when a scaling policy is triggered. The default is false .

  • ScheduledScalingSuspended (boolean) --

    Whether scheduled scaling is suspended. Set the value to true if you don't want Application Auto Scaling to add or remove capacity by initiating scheduled actions. The default is false .

rtype

dict

returns

Response Syntax

{}

Response Structure

  • (dict) --