Class: AWS.ApplicationAutoScaling

var params = {
  ResourceId: 'STRING_VALUE', /* required */
  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 | comprehend:document-classifier-endpoint:DesiredInferenceUnits | comprehend:entity-recognizer-endpoint:DesiredInferenceUnits | lambda:function:ProvisionedConcurrency | cassandra:table:ReadCapacityUnits | cassandra:table:WriteCapacityUnits | kafka:broker-storage:VolumeSize | elasticache:replication-group:NodeGroups | elasticache:replication-group:Replicas | neptune:cluster:ReadReplicaCount, /* required */
  ScheduledActionName: 'STRING_VALUE', /* required */
  ServiceNamespace: ecs | elasticmapreduce | ec2 | appstream | dynamodb | rds | sagemaker | custom-resource | comprehend | lambda | cassandra | kafka | elasticache | neptune /* required */
};
applicationautoscaling.deleteScheduledAction(params, function(err, data) {
  if (err) console.log(err, err.stack); // an error occurred
  else     console.log(data);           // successful response
});

Parameters:

• params (Object) (defaults to: {}) —
  • ServiceNamespace — (String)

    The namespace of the Amazon Web Services service that provides the resource. For a resource provided by your own application or service, use custom-resource instead.

    Possible values include:
    • "ecs"
    • "elasticmapreduce"
    • "ec2"
    • "appstream"
    • "dynamodb"
    • "rds"
    • "sagemaker"
    • "custom-resource"
    • "comprehend"
    • "lambda"
    • "cassandra"
    • "kafka"
    • "elasticache"
    • "neptune"
  • ScheduledActionName — (String)

    The name of the scheduled action.

  • ResourceId — (String)

    The identifier of the resource associated with the scheduled action. 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 - 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 table name. Example: table/my-table.

    • DynamoDB global secondary index - The resource type is index and the unique identifier is the index name. 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.

    • SageMaker endpoint variant - 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.

    • Amazon Comprehend document classification endpoint - The resource type and unique identifier are specified using the endpoint ARN. Example: arn:aws:comprehend:us-west-2:123456789012:document-classifier-endpoint/EXAMPLE.

    • Amazon Comprehend entity recognizer endpoint - The resource type and unique identifier are specified using the endpoint ARN. Example: arn:aws:comprehend:us-west-2:123456789012:entity-recognizer-endpoint/EXAMPLE.

    • Lambda provisioned concurrency - The resource type is function and the unique identifier is the function name with a function version or alias name suffix that is not $LATEST. Example: function:my-function:prod or function:my-function:1.

    • Amazon Keyspaces table - The resource type is table and the unique identifier is the table name. Example: keyspace/mykeyspace/table/mytable.

    • Amazon MSK cluster - The resource type and unique identifier are specified using the cluster ARN. Example: arn:aws:kafka:us-east-1:123456789012:cluster/demo-cluster-1/6357e0b2-0e6a-4b86-a0b4-70df934c2e31-5.

    • Amazon ElastiCache replication group - The resource type is replication-group and the unique identifier is the replication group name. Example: replication-group/mycluster.

    • Neptune cluster - The resource type is cluster and the unique identifier is the cluster name. Example: cluster:mycluster.

  • ScalableDimension — (String)

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

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

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

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

    • 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 SageMaker model endpoint variant.

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

    • comprehend:document-classifier-endpoint:DesiredInferenceUnits - The number of inference units for an Amazon Comprehend document classification endpoint.

    • comprehend:entity-recognizer-endpoint:DesiredInferenceUnits - The number of inference units for an Amazon Comprehend entity recognizer endpoint.

    • lambda:function:ProvisionedConcurrency - The provisioned concurrency for a Lambda function.

    • cassandra:table:ReadCapacityUnits - The provisioned read capacity for an Amazon Keyspaces table.

    • cassandra:table:WriteCapacityUnits - The provisioned write capacity for an Amazon Keyspaces table.

    • kafka:broker-storage:VolumeSize - The provisioned volume size (in GiB) for brokers in an Amazon MSK cluster.

    • elasticache:replication-group:NodeGroups - The number of node groups for an Amazon ElastiCache replication group.

    • elasticache:replication-group:Replicas - The number of replicas per node group for an Amazon ElastiCache replication group.

    • neptune:cluster:ReadReplicaCount - The count of read replicas in an Amazon Neptune DB cluster.

    Possible values include:
    • "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"
    • "comprehend:document-classifier-endpoint:DesiredInferenceUnits"
    • "comprehend:entity-recognizer-endpoint:DesiredInferenceUnits"
    • "lambda:function:ProvisionedConcurrency"
    • "cassandra:table:ReadCapacityUnits"
    • "cassandra:table:WriteCapacityUnits"
    • "kafka:broker-storage:VolumeSize"
    • "elasticache:replication-group:NodeGroups"
    • "elasticache:replication-group:Replicas"
    • "neptune:cluster:ReadReplicaCount"

Callback (callback):

• function(err, data) { ... }

  Called when a response from the service is returned. If a callback is not supplied, you must call AWS.Request.send() on the returned request object to initiate the request.

  Context (this):

  • (AWS.Response) —

    the response object containing error, data properties, and the original request object.

  Parameters:

  • err (Error) —

    the error object returned from the request. Set to null if the request is successful.

  • data (Object) —

    the de-serialized data returned from the request. Set to null if a request error occurs.

Returns:

• (AWS.Request) —

  a handle to the operation request for subsequent event callback registration.

/* This example deregisters a scalable target for an Amazon ECS service called web-app that is running in the default cluster. */

 var params = {
  ResourceId: "service/default/web-app", 
  ScalableDimension: "ecs:service:DesiredCount", 
  ServiceNamespace: "ecs"
 };
 applicationautoscaling.deregisterScalableTarget(params, function(err, data) {
   if (err) console.log(err, err.stack); // an error occurred
   else     console.log(data);           // successful response
   /*
   data = {
   }
   */
 });

var params = {
  ResourceId: 'STRING_VALUE', /* required */
  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 | comprehend:document-classifier-endpoint:DesiredInferenceUnits | comprehend:entity-recognizer-endpoint:DesiredInferenceUnits | lambda:function:ProvisionedConcurrency | cassandra:table:ReadCapacityUnits | cassandra:table:WriteCapacityUnits | kafka:broker-storage:VolumeSize | elasticache:replication-group:NodeGroups | elasticache:replication-group:Replicas | neptune:cluster:ReadReplicaCount, /* required */
  ServiceNamespace: ecs | elasticmapreduce | ec2 | appstream | dynamodb | rds | sagemaker | custom-resource | comprehend | lambda | cassandra | kafka | elasticache | neptune /* required */
};
applicationautoscaling.deregisterScalableTarget(params, function(err, data) {
  if (err) console.log(err, err.stack); // an error occurred
  else     console.log(data);           // successful response
});

Parameters:

• params (Object) (defaults to: {}) —
  • ServiceNamespace — (String)

    The namespace of the Amazon Web Services service that provides the resource. For a resource provided by your own application or service, use custom-resource instead.

    Possible values include:
    • "ecs"
    • "elasticmapreduce"
    • "ec2"
    • "appstream"
    • "dynamodb"
    • "rds"
    • "sagemaker"
    • "custom-resource"
    • "comprehend"
    • "lambda"
    • "cassandra"
    • "kafka"
    • "elasticache"
    • "neptune"
  • 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 - 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 table name. Example: table/my-table.

    • DynamoDB global secondary index - The resource type is index and the unique identifier is the index name. 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.

    • SageMaker endpoint variant - 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.

    • Amazon Comprehend document classification endpoint - The resource type and unique identifier are specified using the endpoint ARN. Example: arn:aws:comprehend:us-west-2:123456789012:document-classifier-endpoint/EXAMPLE.

    • Amazon Comprehend entity recognizer endpoint - The resource type and unique identifier are specified using the endpoint ARN. Example: arn:aws:comprehend:us-west-2:123456789012:entity-recognizer-endpoint/EXAMPLE.

    • Lambda provisioned concurrency - The resource type is function and the unique identifier is the function name with a function version or alias name suffix that is not $LATEST. Example: function:my-function:prod or function:my-function:1.

    • Amazon Keyspaces table - The resource type is table and the unique identifier is the table name. Example: keyspace/mykeyspace/table/mytable.

    • Amazon MSK cluster - The resource type and unique identifier are specified using the cluster ARN. Example: arn:aws:kafka:us-east-1:123456789012:cluster/demo-cluster-1/6357e0b2-0e6a-4b86-a0b4-70df934c2e31-5.

    • Amazon ElastiCache replication group - The resource type is replication-group and the unique identifier is the replication group name. Example: replication-group/mycluster.

    • Neptune cluster - The resource type is cluster and the unique identifier is the cluster name. Example: cluster:mycluster.

  • 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.

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

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

    • 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 SageMaker model endpoint variant.

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

    • comprehend:document-classifier-endpoint:DesiredInferenceUnits - The number of inference units for an Amazon Comprehend document classification endpoint.

    • comprehend:entity-recognizer-endpoint:DesiredInferenceUnits - The number of inference units for an Amazon Comprehend entity recognizer endpoint.

    • lambda:function:ProvisionedConcurrency - The provisioned concurrency for a Lambda function.

    • cassandra:table:ReadCapacityUnits - The provisioned read capacity for an Amazon Keyspaces table.

    • cassandra:table:WriteCapacityUnits - The provisioned write capacity for an Amazon Keyspaces table.

    • kafka:broker-storage:VolumeSize - The provisioned volume size (in GiB) for brokers in an Amazon MSK cluster.

    • elasticache:replication-group:NodeGroups - The number of node groups for an Amazon ElastiCache replication group.

    • elasticache:replication-group:Replicas - The number of replicas per node group for an Amazon ElastiCache replication group.

    • neptune:cluster:ReadReplicaCount - The count of read replicas in an Amazon Neptune DB cluster.

    Possible values include:
    • "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"
    • "comprehend:document-classifier-endpoint:DesiredInferenceUnits"
    • "comprehend:entity-recognizer-endpoint:DesiredInferenceUnits"
    • "lambda:function:ProvisionedConcurrency"
    • "cassandra:table:ReadCapacityUnits"
    • "cassandra:table:WriteCapacityUnits"
    • "kafka:broker-storage:VolumeSize"
    • "elasticache:replication-group:NodeGroups"
    • "elasticache:replication-group:Replicas"
    • "neptune:cluster:ReadReplicaCount"

Callback (callback):

• function(err, data) { ... }

  Called when a response from the service is returned. If a callback is not supplied, you must call AWS.Request.send() on the returned request object to initiate the request.

  Context (this):

  • (AWS.Response) —

    the response object containing error, data properties, and the original request object.

  Parameters:

  • err (Error) —

    the error object returned from the request. Set to null if the request is successful.

  • data (Object) —

    the de-serialized data returned from the request. Set to null if a request error occurs.

Returns:

• (AWS.Request) —

  a handle to the operation request for subsequent event callback registration.

/* This example describes the scalable targets for the ECS service namespace. */

 var params = {
  ServiceNamespace: "ecs"
 };
 applicationautoscaling.describeScalableTargets(params, function(err, data) {
   if (err) console.log(err, err.stack); // an error occurred
   else     console.log(data);           // successful response
   /*
   data = {
    ScalableTargets: [
       {
      CreationTime: <Date Representation>, 
      MaxCapacity: 10, 
      MinCapacity: 1, 
      ResourceId: "service/default/web-app", 
      RoleARN: "arn:aws:iam::012345678910:role/aws-service-role/ecs.application-autoscaling.amazonaws.com/AWSServiceRoleForApplicationAutoScaling_ECSService", 
      ScalableDimension: "ecs:service:DesiredCount", 
      ServiceNamespace: "ecs", 
      SuspendedState: {
       DynamicScalingInSuspended: false, 
       DynamicScalingOutSuspended: false, 
       ScheduledScalingSuspended: false
      }
     }
    ]
   }
   */
 });

var params = {
  ServiceNamespace: ecs | elasticmapreduce | ec2 | appstream | dynamodb | rds | sagemaker | custom-resource | comprehend | lambda | cassandra | kafka | elasticache | neptune, /* required */
  MaxResults: 'NUMBER_VALUE',
  NextToken: 'STRING_VALUE',
  ResourceIds: [
    'STRING_VALUE',
    /* more items */
  ],
  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 | comprehend:document-classifier-endpoint:DesiredInferenceUnits | comprehend:entity-recognizer-endpoint:DesiredInferenceUnits | lambda:function:ProvisionedConcurrency | cassandra:table:ReadCapacityUnits | cassandra:table:WriteCapacityUnits | kafka:broker-storage:VolumeSize | elasticache:replication-group:NodeGroups | elasticache:replication-group:Replicas | neptune:cluster:ReadReplicaCount
};
applicationautoscaling.describeScalableTargets(params, function(err, data) {
  if (err) console.log(err, err.stack); // an error occurred
  else     console.log(data);           // successful response
});

Parameters:

• params (Object) (defaults to: {}) —
  • ServiceNamespace — (String)

    The namespace of the Amazon Web Services service that provides the resource. For a resource provided by your own application or service, use custom-resource instead.

    Possible values include:
    • "ecs"
    • "elasticmapreduce"
    • "ec2"
    • "appstream"
    • "dynamodb"
    • "rds"
    • "sagemaker"
    • "custom-resource"
    • "comprehend"
    • "lambda"
    • "cassandra"
    • "kafka"
    • "elasticache"
    • "neptune"
  • ResourceIds — (Array<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 - 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 table name. Example: table/my-table.

    • DynamoDB global secondary index - The resource type is index and the unique identifier is the index name. 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.

    • SageMaker endpoint variant - 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.

    • Amazon Comprehend document classification endpoint - The resource type and unique identifier are specified using the endpoint ARN. Example: arn:aws:comprehend:us-west-2:123456789012:document-classifier-endpoint/EXAMPLE.

    • Amazon Comprehend entity recognizer endpoint - The resource type and unique identifier are specified using the endpoint ARN. Example: arn:aws:comprehend:us-west-2:123456789012:entity-recognizer-endpoint/EXAMPLE.

    • Lambda provisioned concurrency - The resource type is function and the unique identifier is the function name with a function version or alias name suffix that is not $LATEST. Example: function:my-function:prod or function:my-function:1.

    • Amazon Keyspaces table - The resource type is table and the unique identifier is the table name. Example: keyspace/mykeyspace/table/mytable.

    • Amazon MSK cluster - The resource type and unique identifier are specified using the cluster ARN. Example: arn:aws:kafka:us-east-1:123456789012:cluster/demo-cluster-1/6357e0b2-0e6a-4b86-a0b4-70df934c2e31-5.

    • Amazon ElastiCache replication group - The resource type is replication-group and the unique identifier is the replication group name. Example: replication-group/mycluster.

    • Neptune cluster - The resource type is cluster and the unique identifier is the cluster name. Example: cluster:mycluster.

  • ScalableDimension — (String)

    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.

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

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

    • 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 SageMaker model endpoint variant.

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

    • comprehend:document-classifier-endpoint:DesiredInferenceUnits - The number of inference units for an Amazon Comprehend document classification endpoint.

    • comprehend:entity-recognizer-endpoint:DesiredInferenceUnits - The number of inference units for an Amazon Comprehend entity recognizer endpoint.

    • lambda:function:ProvisionedConcurrency - The provisioned concurrency for a Lambda function.

    • cassandra:table:ReadCapacityUnits - The provisioned read capacity for an Amazon Keyspaces table.

    • cassandra:table:WriteCapacityUnits - The provisioned write capacity for an Amazon Keyspaces table.

    • kafka:broker-storage:VolumeSize - The provisioned volume size (in GiB) for brokers in an Amazon MSK cluster.

    • elasticache:replication-group:NodeGroups - The number of node groups for an Amazon ElastiCache replication group.

    • elasticache:replication-group:Replicas - The number of replicas per node group for an Amazon ElastiCache replication group.

    • neptune:cluster:ReadReplicaCount - The count of read replicas in an Amazon Neptune DB cluster.

    Possible values include:
    • "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"
    • "comprehend:document-classifier-endpoint:DesiredInferenceUnits"
    • "comprehend:entity-recognizer-endpoint:DesiredInferenceUnits"
    • "lambda:function:ProvisionedConcurrency"
    • "cassandra:table:ReadCapacityUnits"
    • "cassandra:table:WriteCapacityUnits"
    • "kafka:broker-storage:VolumeSize"
    • "elasticache:replication-group:NodeGroups"
    • "elasticache:replication-group:Replicas"
    • "neptune:cluster:ReadReplicaCount"
  • MaxResults — (Integer)

    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.

  • NextToken — (String)

    The token for the next set of results.

Callback (callback):

• function(err, data) { ... }

  Called when a response from the service is returned. If a callback is not supplied, you must call AWS.Request.send() on the returned request object to initiate the request.

  Context (this):

  • (AWS.Response) —

    the response object containing error, data properties, and the original request object.

  Parameters:

  • err (Error) —

    the error object returned from the request. Set to null if the request is successful.

  • data (Object) —

    the de-serialized data returned from the request. Set to null if a request error occurs. The data object has the following properties:

    • ScalableTargets — (Array<map>)

      The scalable targets that match the request parameters.

      • ServiceNamespace — required — (String)

        The namespace of the Amazon Web Services service that provides the resource, or a custom-resource.

        Possible values include:
        • "ecs"
        • "elasticmapreduce"
        • "ec2"
        • "appstream"
        • "dynamodb"
        • "rds"
        • "sagemaker"
        • "custom-resource"
        • "comprehend"
        • "lambda"
        • "cassandra"
        • "kafka"
        • "elasticache"
        • "neptune"
      • ResourceId — required — (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 - 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 table name. Example: table/my-table.

        • DynamoDB global secondary index - The resource type is index and the unique identifier is the index name. 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.

        • SageMaker endpoint variant - 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.

        • Amazon Comprehend document classification endpoint - The resource type and unique identifier are specified using the endpoint ARN. Example: arn:aws:comprehend:us-west-2:123456789012:document-classifier-endpoint/EXAMPLE.

        • Amazon Comprehend entity recognizer endpoint - The resource type and unique identifier are specified using the endpoint ARN. Example: arn:aws:comprehend:us-west-2:123456789012:entity-recognizer-endpoint/EXAMPLE.

        • Lambda provisioned concurrency - The resource type is function and the unique identifier is the function name with a function version or alias name suffix that is not $LATEST. Example: function:my-function:prod or function:my-function:1.

        • Amazon Keyspaces table - The resource type is table and the unique identifier is the table name. Example: keyspace/mykeyspace/table/mytable.

        • Amazon MSK cluster - The resource type and unique identifier are specified using the cluster ARN. Example: arn:aws:kafka:us-east-1:123456789012:cluster/demo-cluster-1/6357e0b2-0e6a-4b86-a0b4-70df934c2e31-5.

        • Amazon ElastiCache replication group - The resource type is replication-group and the unique identifier is the replication group name. Example: replication-group/mycluster.

        • Neptune cluster - The resource type is cluster and the unique identifier is the cluster name. Example: cluster:mycluster.

      • ScalableDimension — required — (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.

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

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

        • 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 SageMaker model endpoint variant.

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

        • comprehend:document-classifier-endpoint:DesiredInferenceUnits - The number of inference units for an Amazon Comprehend document classification endpoint.

        • comprehend:entity-recognizer-endpoint:DesiredInferenceUnits - The number of inference units for an Amazon Comprehend entity recognizer endpoint.

        • lambda:function:ProvisionedConcurrency - The provisioned concurrency for a Lambda function.

        • cassandra:table:ReadCapacityUnits - The provisioned read capacity for an Amazon Keyspaces table.

        • cassandra:table:WriteCapacityUnits - The provisioned write capacity for an Amazon Keyspaces table.

        • kafka:broker-storage:VolumeSize - The provisioned volume size (in GiB) for brokers in an Amazon MSK cluster.

        • elasticache:replication-group:NodeGroups - The number of node groups for an Amazon ElastiCache replication group.

        • elasticache:replication-group:Replicas - The number of replicas per node group for an Amazon ElastiCache replication group.

        • neptune:cluster:ReadReplicaCount - The count of read replicas in an Amazon Neptune DB cluster.

        Possible values include:
        • "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"
        • "comprehend:document-classifier-endpoint:DesiredInferenceUnits"
        • "comprehend:entity-recognizer-endpoint:DesiredInferenceUnits"
        • "lambda:function:ProvisionedConcurrency"
        • "cassandra:table:ReadCapacityUnits"
        • "cassandra:table:WriteCapacityUnits"
        • "kafka:broker-storage:VolumeSize"
        • "elasticache:replication-group:NodeGroups"
        • "elasticache:replication-group:Replicas"
        • "neptune:cluster:ReadReplicaCount"
      • MinCapacity — required — (Integer)

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

      • MaxCapacity — required — (Integer)

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

      • RoleARN — required — (String)

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

      • CreationTime — required — (Date)

        The Unix timestamp for when the scalable target was created.

      • SuspendedState — (map)

        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.

Returns:

• (AWS.Request) —

  a handle to the operation request for subsequent event callback registration.

/* This example describes the scaling activities for an Amazon ECS service called web-app that is running in the default cluster. */

 var params = {
  ResourceId: "service/default/web-app", 
  ScalableDimension: "ecs:service:DesiredCount", 
  ServiceNamespace: "ecs"
 };
 applicationautoscaling.describeScalingActivities(params, function(err, data) {
   if (err) console.log(err, err.stack); // an error occurred
   else     console.log(data);           // successful response
   /*
   data = {
    ScalingActivities: [
       {
      ActivityId: "e6c5f7d1-dbbb-4a3f-89b2-51f33e766399", 
      Cause: "monitor alarm web-app-cpu-lt-25 in state ALARM triggered policy web-app-cpu-lt-25", 
      Description: "Setting desired count to 1.", 
      EndTime: <Date Representation>, 
      ResourceId: "service/default/web-app", 
      ScalableDimension: "ecs:service:DesiredCount", 
      ServiceNamespace: "ecs", 
      StartTime: <Date Representation>, 
      StatusCode: "Successful", 
      StatusMessage: "Successfully set desired count to 1. Change successfully fulfilled by ecs."
     }
    ]
   }
   */
 });

var params = {
  ServiceNamespace: ecs | elasticmapreduce | ec2 | appstream | dynamodb | rds | sagemaker | custom-resource | comprehend | lambda | cassandra | kafka | elasticache | neptune, /* required */
  MaxResults: 'NUMBER_VALUE',
  NextToken: 'STRING_VALUE',
  ResourceId: 'STRING_VALUE',
  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 | comprehend:document-classifier-endpoint:DesiredInferenceUnits | comprehend:entity-recognizer-endpoint:DesiredInferenceUnits | lambda:function:ProvisionedConcurrency | cassandra:table:ReadCapacityUnits | cassandra:table:WriteCapacityUnits | kafka:broker-storage:VolumeSize | elasticache:replication-group:NodeGroups | elasticache:replication-group:Replicas | neptune:cluster:ReadReplicaCount
};
applicationautoscaling.describeScalingActivities(params, function(err, data) {
  if (err) console.log(err, err.stack); // an error occurred
  else     console.log(data);           // successful response
});

Parameters:

• params (Object) (defaults to: {}) —
  • ServiceNamespace — (String)

    The namespace of the Amazon Web Services service that provides the resource. For a resource provided by your own application or service, use custom-resource instead.

    Possible values include:
    • "ecs"
    • "elasticmapreduce"
    • "ec2"
    • "appstream"
    • "dynamodb"
    • "rds"
    • "sagemaker"
    • "custom-resource"
    • "comprehend"
    • "lambda"
    • "cassandra"
    • "kafka"
    • "elasticache"
    • "neptune"
  • ResourceId — (String)

    The identifier of the resource associated with the scaling activity. 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 - 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 table name. Example: table/my-table.

    • DynamoDB global secondary index - The resource type is index and the unique identifier is the index name. 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.

    • SageMaker endpoint variant - 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.

    • Amazon Comprehend document classification endpoint - The resource type and unique identifier are specified using the endpoint ARN. Example: arn:aws:comprehend:us-west-2:123456789012:document-classifier-endpoint/EXAMPLE.

    • Amazon Comprehend entity recognizer endpoint - The resource type and unique identifier are specified using the endpoint ARN. Example: arn:aws:comprehend:us-west-2:123456789012:entity-recognizer-endpoint/EXAMPLE.

    • Lambda provisioned concurrency - The resource type is function and the unique identifier is the function name with a function version or alias name suffix that is not $LATEST. Example: function:my-function:prod or function:my-function:1.

    • Amazon Keyspaces table - The resource type is table and the unique identifier is the table name. Example: keyspace/mykeyspace/table/mytable.

    • Amazon MSK cluster - The resource type and unique identifier are specified using the cluster ARN. Example: arn:aws:kafka:us-east-1:123456789012:cluster/demo-cluster-1/6357e0b2-0e6a-4b86-a0b4-70df934c2e31-5.

    • Amazon ElastiCache replication group - The resource type is replication-group and the unique identifier is the replication group name. Example: replication-group/mycluster.

    • Neptune cluster - The resource type is cluster and the unique identifier is the cluster name. Example: cluster:mycluster.

  • ScalableDimension — (String)

    The scalable dimension. 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.

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

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

    • 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 SageMaker model endpoint variant.

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

    • comprehend:document-classifier-endpoint:DesiredInferenceUnits - The number of inference units for an Amazon Comprehend document classification endpoint.

    • comprehend:entity-recognizer-endpoint:DesiredInferenceUnits - The number of inference units for an Amazon Comprehend entity recognizer endpoint.

    • lambda:function:ProvisionedConcurrency - The provisioned concurrency for a Lambda function.

    • cassandra:table:ReadCapacityUnits - The provisioned read capacity for an Amazon Keyspaces table.

    • cassandra:table:WriteCapacityUnits - The provisioned write capacity for an Amazon Keyspaces table.

    • kafka:broker-storage:VolumeSize - The provisioned volume size (in GiB) for brokers in an Amazon MSK cluster.

    • elasticache:replication-group:NodeGroups - The number of node groups for an Amazon ElastiCache replication group.

    • elasticache:replication-group:Replicas - The number of replicas per node group for an Amazon ElastiCache replication group.

    • neptune:cluster:ReadReplicaCount - The count of read replicas in an Amazon Neptune DB cluster.

    Possible values include:
    • "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"
    • "comprehend:document-classifier-endpoint:DesiredInferenceUnits"
    • "comprehend:entity-recognizer-endpoint:DesiredInferenceUnits"
    • "lambda:function:ProvisionedConcurrency"
    • "cassandra:table:ReadCapacityUnits"
    • "cassandra:table:WriteCapacityUnits"
    • "kafka:broker-storage:VolumeSize"
    • "elasticache:replication-group:NodeGroups"
    • "elasticache:replication-group:Replicas"
    • "neptune:cluster:ReadReplicaCount"
  • MaxResults — (Integer)

    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.

  • NextToken — (String)

    The token for the next set of results.

Callback (callback):

• function(err, data) { ... }

  Called when a response from the service is returned. If a callback is not supplied, you must call AWS.Request.send() on the returned request object to initiate the request.

  Context (this):

  • (AWS.Response) —

    the response object containing error, data properties, and the original request object.

  Parameters:

  • err (Error) —

    the error object returned from the request. Set to null if the request is successful.

  • data (Object) —

    the de-serialized data returned from the request. Set to null if a request error occurs. The data object has the following properties:

    • ScalingActivities — (Array<map>)

      A list of scaling activity objects.

      • ActivityId — required — (String)

        The unique identifier of the scaling activity.

      • ServiceNamespace — required — (String)

        The namespace of the Amazon Web Services service that provides the resource, or a custom-resource.

        Possible values include:
        • "ecs"
        • "elasticmapreduce"
        • "ec2"
        • "appstream"
        • "dynamodb"
        • "rds"
        • "sagemaker"
        • "custom-resource"
        • "comprehend"
        • "lambda"
        • "cassandra"
        • "kafka"
        • "elasticache"
        • "neptune"
      • ResourceId — required — (String)

        The identifier of the resource associated with the scaling activity. 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 - 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 table name. Example: table/my-table.

        • DynamoDB global secondary index - The resource type is index and the unique identifier is the index name. 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.

        • SageMaker endpoint variant - 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.

        • Amazon Comprehend document classification endpoint - The resource type and unique identifier are specified using the endpoint ARN. Example: arn:aws:comprehend:us-west-2:123456789012:document-classifier-endpoint/EXAMPLE.

        • Amazon Comprehend entity recognizer endpoint - The resource type and unique identifier are specified using the endpoint ARN. Example: arn:aws:comprehend:us-west-2:123456789012:entity-recognizer-endpoint/EXAMPLE.

        • Lambda provisioned concurrency - The resource type is function and the unique identifier is the function name with a function version or alias name suffix that is not $LATEST. Example: function:my-function:prod or function:my-function:1.

        • Amazon Keyspaces table - The resource type is table and the unique identifier is the table name. Example: keyspace/mykeyspace/table/mytable.

        • Amazon MSK cluster - The resource type and unique identifier are specified using the cluster ARN. Example: arn:aws:kafka:us-east-1:123456789012:cluster/demo-cluster-1/6357e0b2-0e6a-4b86-a0b4-70df934c2e31-5.

        • Amazon ElastiCache replication group - The resource type is replication-group and the unique identifier is the replication group name. Example: replication-group/mycluster.

        • Neptune cluster - The resource type is cluster and the unique identifier is the cluster name. Example: cluster:mycluster.

      • ScalableDimension — required — (String)

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

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

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

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

        • 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 SageMaker model endpoint variant.

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

        • comprehend:document-classifier-endpoint:DesiredInferenceUnits - The number of inference units for an Amazon Comprehend document classification endpoint.

        • comprehend:entity-recognizer-endpoint:DesiredInferenceUnits - The number of inference units for an Amazon Comprehend entity recognizer endpoint.

        • lambda:function:ProvisionedConcurrency - The provisioned concurrency for a Lambda function.

        • cassandra:table:ReadCapacityUnits - The provisioned read capacity for an Amazon Keyspaces table.

        • cassandra:table:WriteCapacityUnits - The provisioned write capacity for an Amazon Keyspaces table.

        • kafka:broker-storage:VolumeSize - The provisioned volume size (in GiB) for brokers in an Amazon MSK cluster.

        • elasticache:replication-group:NodeGroups - The number of node groups for an Amazon ElastiCache replication group.

        • elasticache:replication-group:Replicas - The number of replicas per node group for an Amazon ElastiCache replication group.

        • neptune:cluster:ReadReplicaCount - The count of read replicas in an Amazon Neptune DB cluster.

        Possible values include:
        • "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"
        • "comprehend:document-classifier-endpoint:DesiredInferenceUnits"
        • "comprehend:entity-recognizer-endpoint:DesiredInferenceUnits"
        • "lambda:function:ProvisionedConcurrency"
        • "cassandra:table:ReadCapacityUnits"
        • "cassandra:table:WriteCapacityUnits"
        • "kafka:broker-storage:VolumeSize"
        • "elasticache:replication-group:NodeGroups"
        • "elasticache:replication-group:Replicas"
        • "neptune:cluster:ReadReplicaCount"
      • Description — required — (String)

        A simple description of what action the scaling activity intends to accomplish.

      • Cause — required — (String)

        A simple description of what caused the scaling activity to happen.

      • StartTime — required — (Date)

        The Unix timestamp for when the scaling activity began.

      • EndTime — (Date)

        The Unix timestamp for when the scaling activity ended.

      • StatusCode — required — (String)

        Indicates the status of the scaling activity.

        Possible values include:
        • "Pending"
        • "InProgress"
        • "Successful"
        • "Overridden"
        • "Unfulfilled"
        • "Failed"
      • StatusMessage — (String)

        A simple message about the current status of the scaling activity.

      • Details — (String)

        The details about the scaling activity.

    • NextToken — (String)

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

Returns:

• (AWS.Request) —

  a handle to the operation request for subsequent event callback registration.

/* This example describes the scaling policies for the ECS service namespace. */

 var params = {
  ServiceNamespace: "ecs"
 };
 applicationautoscaling.describeScalingPolicies(params, function(err, data) {
   if (err) console.log(err, err.stack); // an error occurred
   else     console.log(data);           // successful response
   /*
   data = {
    NextToken: "", 
    ScalingPolicies: [
       {
      Alarms: [
         {
        AlarmARN: "arn:aws:cloudwatch:us-west-2:012345678910:alarm:web-app-cpu-gt-75", 
        AlarmName: "web-app-cpu-gt-75"
       }
      ], 
      CreationTime: <Date Representation>, 
      PolicyARN: "arn:aws:autoscaling:us-west-2:012345678910:scalingPolicy:6d8972f3-efc8-437c-92d1-6270f29a66e7:resource/ecs/service/default/web-app:policyName/web-app-cpu-gt-75", 
      PolicyName: "web-app-cpu-gt-75", 
      PolicyType: "StepScaling", 
      ResourceId: "service/default/web-app", 
      ScalableDimension: "ecs:service:DesiredCount", 
      ServiceNamespace: "ecs", 
      StepScalingPolicyConfiguration: {
       AdjustmentType: "PercentChangeInCapacity", 
       Cooldown: 60, 
       StepAdjustments: [
          {
         MetricIntervalLowerBound: 0, 
         ScalingAdjustment: 200
        }
       ]
      }
     }
    ]
   }
   */
 });

var params = {
  ServiceNamespace: ecs | elasticmapreduce | ec2 | appstream | dynamodb | rds | sagemaker | custom-resource | comprehend | lambda | cassandra | kafka | elasticache | neptune, /* required */
  MaxResults: 'NUMBER_VALUE',
  NextToken: 'STRING_VALUE',
  PolicyNames: [
    'STRING_VALUE',
    /* more items */
  ],
  ResourceId: 'STRING_VALUE',
  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 | comprehend:document-classifier-endpoint:DesiredInferenceUnits | comprehend:entity-recognizer-endpoint:DesiredInferenceUnits | lambda:function:ProvisionedConcurrency | cassandra:table:ReadCapacityUnits | cassandra:table:WriteCapacityUnits | kafka:broker-storage:VolumeSize | elasticache:replication-group:NodeGroups | elasticache:replication-group:Replicas | neptune:cluster:ReadReplicaCount
};
applicationautoscaling.describeScalingPolicies(params, function(err, data) {
  if (err) console.log(err, err.stack); // an error occurred
  else     console.log(data);           // successful response
});

Parameters:

• params (Object) (defaults to: {}) —
  • PolicyNames — (Array<String>)

    The names of the scaling policies to describe.

  • ServiceNamespace — (String)

    The namespace of the Amazon Web Services service that provides the resource. For a resource provided by your own application or service, use custom-resource instead.

    Possible values include:
    • "ecs"
    • "elasticmapreduce"
    • "ec2"
    • "appstream"
    • "dynamodb"
    • "rds"
    • "sagemaker"
    • "custom-resource"
    • "comprehend"
    • "lambda"
    • "cassandra"
    • "kafka"
    • "elasticache"
    • "neptune"
  • ResourceId — (String)

    The identifier of the resource associated with the scaling policy. 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 - 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 table name. Example: table/my-table.

    • DynamoDB global secondary index - The resource type is index and the unique identifier is the index name. 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.

    • SageMaker endpoint variant - 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.

    • Amazon Comprehend document classification endpoint - The resource type and unique identifier are specified using the endpoint ARN. Example: arn:aws:comprehend:us-west-2:123456789012:document-classifier-endpoint/EXAMPLE.

    • Amazon Comprehend entity recognizer endpoint - The resource type and unique identifier are specified using the endpoint ARN. Example: arn:aws:comprehend:us-west-2:123456789012:entity-recognizer-endpoint/EXAMPLE.

    • Lambda provisioned concurrency - The resource type is function and the unique identifier is the function name with a function version or alias name suffix that is not $LATEST. Example: function:my-function:prod or function:my-function:1.

    • Amazon Keyspaces table - The resource type is table and the unique identifier is the table name. Example: keyspace/mykeyspace/table/mytable.

    • Amazon MSK cluster - The resource type and unique identifier are specified using the cluster ARN. Example: arn:aws:kafka:us-east-1:123456789012:cluster/demo-cluster-1/6357e0b2-0e6a-4b86-a0b4-70df934c2e31-5.

    • Amazon ElastiCache replication group - The resource type is replication-group and the unique identifier is the replication group name. Example: replication-group/mycluster.

    • Neptune cluster - The resource type is cluster and the unique identifier is the cluster name. Example: cluster:mycluster.

  • ScalableDimension — (String)

    The scalable dimension. 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.

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

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

    • 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 SageMaker model endpoint variant.

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

    • comprehend:document-classifier-endpoint:DesiredInferenceUnits - The number of inference units for an Amazon Comprehend document classification endpoint.

    • comprehend:entity-recognizer-endpoint:DesiredInferenceUnits - The number of inference units for an Amazon Comprehend entity recognizer endpoint.

    • lambda:function:ProvisionedConcurrency - The provisioned concurrency for a Lambda function.

    • cassandra:table:ReadCapacityUnits - The provisioned read capacity for an Amazon Keyspaces table.

    • cassandra:table:WriteCapacityUnits - The provisioned write capacity for an Amazon Keyspaces table.

    • kafka:broker-storage:VolumeSize - The provisioned volume size (in GiB) for brokers in an Amazon MSK cluster.

    • elasticache:replication-group:NodeGroups - The number of node groups for an Amazon ElastiCache replication group.

    • elasticache:replication-group:Replicas - The number of replicas per node group for an Amazon ElastiCache replication group.

    • neptune:cluster:ReadReplicaCount - The count of read replicas in an Amazon Neptune DB cluster.

    Possible values include:
    • "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"
    • "comprehend:document-classifier-endpoint:DesiredInferenceUnits"
    • "comprehend:entity-recognizer-endpoint:DesiredInferenceUnits"
    • "lambda:function:ProvisionedConcurrency"
    • "cassandra:table:ReadCapacityUnits"
    • "cassandra:table:WriteCapacityUnits"
    • "kafka:broker-storage:VolumeSize"
    • "elasticache:replication-group:NodeGroups"
    • "elasticache:replication-group:Replicas"
    • "neptune:cluster:ReadReplicaCount"
  • MaxResults — (Integer)

    The maximum number of scalable targets. This value can be between 1 and 10. The default value is 10.

    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 10 results and a NextToken value, if applicable.

  • NextToken — (String)

    The token for the next set of results.

Callback (callback):

• function(err, data) { ... }

  Called when a response from the service is returned. If a callback is not supplied, you must call AWS.Request.send() on the returned request object to initiate the request.

  Context (this):

  • (AWS.Response) —

    the response object containing error, data properties, and the original request object.

  Parameters:

  • err (Error) —

    the error object returned from the request. Set to null if the request is successful.

  • data (Object) —

    the de-serialized data returned from the request. Set to null if a request error occurs. The data object has the following properties:

    • ScalingPolicies — (Array<map>)

      Information about the scaling policies.

      • PolicyARN — required — (String)

        The Amazon Resource Name (ARN) of the scaling policy.

      • PolicyName — required — (String)

        The name of the scaling policy.

      • ServiceNamespace — required — (String)

        The namespace of the Amazon Web Services service that provides the resource, or a custom-resource.

        Possible values include:
        • "ecs"
        • "elasticmapreduce"
        • "ec2"
        • "appstream"
        • "dynamodb"
        • "rds"
        • "sagemaker"
        • "custom-resource"
        • "comprehend"
        • "lambda"
        • "cassandra"
        • "kafka"
        • "elasticache"
        • "neptune"
      • ResourceId — required — (String)

        The identifier of the resource associated with the scaling policy. 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 - 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 table name. Example: table/my-table.

        • DynamoDB global secondary index - The resource type is index and the unique identifier is the index name. 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.

        • SageMaker endpoint variant - 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.

        • Amazon Comprehend document classification endpoint - The resource type and unique identifier are specified using the endpoint ARN. Example: arn:aws:comprehend:us-west-2:123456789012:document-classifier-endpoint/EXAMPLE.

        • Amazon Comprehend entity recognizer endpoint - The resource type and unique identifier are specified using the endpoint ARN. Example: arn:aws:comprehend:us-west-2:123456789012:entity-recognizer-endpoint/EXAMPLE.

        • Lambda provisioned concurrency - The resource type is function and the unique identifier is the function name with a function version or alias name suffix that is not $LATEST. Example: function:my-function:prod or function:my-function:1.

        • Amazon Keyspaces table - The resource type is table and the unique identifier is the table name. Example: keyspace/mykeyspace/table/mytable.

        • Amazon MSK cluster - The resource type and unique identifier are specified using the cluster ARN. Example: arn:aws:kafka:us-east-1:123456789012:cluster/demo-cluster-1/6357e0b2-0e6a-4b86-a0b4-70df934c2e31-5.

        • Amazon ElastiCache replication group - The resource type is replication-group and the unique identifier is the replication group name. Example: replication-group/mycluster.

        • Neptune cluster - The resource type is cluster and the unique identifier is the cluster name. Example: cluster:mycluster.

      • ScalableDimension — required — (String)

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

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

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

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

        • 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 SageMaker model endpoint variant.

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

        • comprehend:document-classifier-endpoint:DesiredInferenceUnits - The number of inference units for an Amazon Comprehend document classification endpoint.

        • comprehend:entity-recognizer-endpoint:DesiredInferenceUnits - The number of inference units for an Amazon Comprehend entity recognizer endpoint.

        • lambda:function:ProvisionedConcurrency - The provisioned concurrency for a Lambda function.

        • cassandra:table:ReadCapacityUnits - The provisioned read capacity for an Amazon Keyspaces table.

        • cassandra:table:WriteCapacityUnits - The provisioned write capacity for an Amazon Keyspaces table.

        • kafka:broker-storage:VolumeSize - The provisioned volume size (in GiB) for brokers in an Amazon MSK cluster.

        • elasticache:replication-group:NodeGroups - The number of node groups for an Amazon ElastiCache replication group.

        • elasticache:replication-group:Replicas - The number of replicas per node group for an Amazon ElastiCache replication group.

        • neptune:cluster:ReadReplicaCount - The count of read replicas in an Amazon Neptune DB cluster.

        Possible values include:
        • "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"
        • "comprehend:document-classifier-endpoint:DesiredInferenceUnits"
        • "comprehend:entity-recognizer-endpoint:DesiredInferenceUnits"
        • "lambda:function:ProvisionedConcurrency"
        • "cassandra:table:ReadCapacityUnits"
        • "cassandra:table:WriteCapacityUnits"
        • "kafka:broker-storage:VolumeSize"
        • "elasticache:replication-group:NodeGroups"
        • "elasticache:replication-group:Replicas"
        • "neptune:cluster:ReadReplicaCount"
      • PolicyType — required — (String)

        The scaling policy type.

        Possible values include:
        • "StepScaling"
        • "TargetTrackingScaling"
      • StepScalingPolicyConfiguration — (map)

        A step scaling policy.

        • AdjustmentType — (String)

          Specifies how the ScalingAdjustment value in a StepAdjustment is interpreted (for example, an absolute number or a percentage). The valid values are ChangeInCapacity, ExactCapacity, and PercentChangeInCapacity.

          AdjustmentType is required if you are adding a new step scaling policy configuration.

          Possible values include:
          • "ChangeInCapacity"
          • "PercentChangeInCapacity"
          • "ExactCapacity"
        • StepAdjustments — (Array<map>)

          A set of adjustments that enable you to scale based on the size of the alarm breach.

          At least one step adjustment is required if you are adding a new step scaling policy configuration.

          • MetricIntervalLowerBound — (Float)

            The lower bound for the difference between the alarm threshold and the CloudWatch metric. If the metric value is above the breach threshold, the lower bound is inclusive (the metric must be greater than or equal to the threshold plus the lower bound). Otherwise, it is exclusive (the metric must be greater than the threshold plus the lower bound). A null value indicates negative infinity.

          • MetricIntervalUpperBound — (Float)

            The upper bound for the difference between the alarm threshold and the CloudWatch metric. If the metric value is above the breach threshold, the upper bound is exclusive (the metric must be less than the threshold plus the upper bound). Otherwise, it is inclusive (the metric must be less than or equal to the threshold plus the upper bound). A null value indicates positive infinity.

            The upper bound must be greater than the lower bound.

          • ScalingAdjustment — required — (Integer)

            The amount by which to scale, based on the specified adjustment type. A positive value adds to the current capacity while a negative number removes from the current capacity. For exact capacity, you must specify a positive value.

        • MinAdjustmentMagnitude — (Integer)

          The minimum value to scale by when the adjustment type is PercentChangeInCapacity. For example, suppose that you create a step scaling policy to scale out an Amazon ECS service by 25 percent and you specify a MinAdjustmentMagnitude of 2. If the service has 4 tasks and the scaling policy is performed, 25 percent of 4 is 1. However, because you specified a MinAdjustmentMagnitude of 2, Application Auto Scaling scales out the service by 2 tasks.

        • Cooldown — (Integer)

          The amount of time, in seconds, to wait for a previous scaling activity to take effect.

          With scale-out policies, the intention is to continuously (but not excessively) scale out. After Application Auto Scaling successfully scales out using a step scaling policy, it starts to calculate the cooldown time. The scaling policy won't increase the desired capacity again unless either a larger scale out is triggered or the cooldown period ends. While the cooldown period is in effect, capacity added by the initiating scale-out activity is calculated as part of the desired capacity for the next scale-out activity. For example, when an alarm triggers a step scaling policy to increase the capacity by 2, the scaling activity completes successfully, and a cooldown period starts. If the alarm triggers again during the cooldown period but at a more aggressive step adjustment of 3, the previous increase of 2 is considered part of the current capacity. Therefore, only 1 is added to the capacity.

          With scale-in policies, the intention is to scale in conservatively to protect your application’s availability, so scale-in activities are blocked until the cooldown period has expired. However, if another alarm triggers a scale-out activity during the cooldown period after a scale-in activity, Application Auto Scaling scales out the target immediately. In this case, the cooldown period for the scale-in activity stops and doesn't complete.

          Application Auto Scaling provides a default value of 600 for Amazon ElastiCache replication groups and a default value of 300 for the following scalable targets:

          • AppStream 2.0 fleets

          • Aurora DB clusters

          • ECS services

          • EMR clusters

          • Neptune clusters

          • SageMaker endpoint variants

          • Spot Fleets

          • Custom resources

          For all other scalable targets, the default value is 0:

          • Amazon Comprehend document classification and entity recognizer endpoints

          • DynamoDB tables and global secondary indexes

          • Amazon Keyspaces tables

          • Lambda provisioned concurrency

          • Amazon MSK broker storage

        • MetricAggregationType — (String)

          The aggregation type for the CloudWatch metrics. Valid values are Minimum, Maximum, and Average. If the aggregation type is null, the value is treated as Average.

          Possible values include:
          • "Average"
          • "Minimum"
          • "Maximum"
      • TargetTrackingScalingPolicyConfiguration — (map)

        A target tracking scaling policy.

        • TargetValue — required — (Float)

          The target value for the metric. Although this property accepts numbers of type Double, it won't accept values that are either too small or too large. Values must be in the range of -2³⁶⁰ to 2³⁶⁰. The value must be a valid number based on the choice of metric. For example, if the metric is CPU utilization, then the target value is a percent value that represents how much of the CPU can be used before scaling out.

        • PredefinedMetricSpecification — (map)

          A predefined metric. You can specify either a predefined metric or a customized metric.

          • PredefinedMetricType — required — (String)

            The metric type. The ALBRequestCountPerTarget metric type applies only to Spot Fleet requests and ECS services.

            Possible values include:
            • "DynamoDBReadCapacityUtilization"
            • "DynamoDBWriteCapacityUtilization"
            • "ALBRequestCountPerTarget"
            • "RDSReaderAverageCPUUtilization"
            • "RDSReaderAverageDatabaseConnections"
            • "EC2SpotFleetRequestAverageCPUUtilization"
            • "EC2SpotFleetRequestAverageNetworkIn"
            • "EC2SpotFleetRequestAverageNetworkOut"
            • "SageMakerVariantInvocationsPerInstance"
            • "ECSServiceAverageCPUUtilization"
            • "ECSServiceAverageMemoryUtilization"
            • "AppStreamAverageCapacityUtilization"
            • "ComprehendInferenceUtilization"
            • "LambdaProvisionedConcurrencyUtilization"
            • "CassandraReadCapacityUtilization"
            • "CassandraWriteCapacityUtilization"
            • "KafkaBrokerStorageUtilization"
            • "ElastiCachePrimaryEngineCPUUtilization"
            • "ElastiCacheReplicaEngineCPUUtilization"
            • "ElastiCacheDatabaseMemoryUsageCountedForEvictPercentage"
            • "NeptuneReaderAverageCPUUtilization"
          • ResourceLabel — (String)

            Identifies the resource associated with the metric type. You can't specify a resource label unless the metric type is ALBRequestCountPerTarget and there is a target group attached to the Spot Fleet request or ECS service.

            You create the resource label by appending the final portion of the load balancer ARN and the final portion of the target group ARN into a single value, separated by a forward slash (/). The format of the resource label is:

            app/my-alb/778d41231b141a0f/targetgroup/my-alb-target-group/943f017f100becff.

            Where:

            • app/<load-balancer-name>/<load-balancer-id> is the final portion of the load balancer ARN

            • targetgroup/<target-group-name>/<target-group-id> is the final portion of the target group ARN.

            To find the ARN for an Application Load Balancer, use the DescribeLoadBalancers API operation. To find the ARN for the target group, use the DescribeTargetGroups API operation.

        • CustomizedMetricSpecification — (map)

          A customized metric. You can specify either a predefined metric or a customized metric.

          • MetricName — required — (String)

            The name of the metric.

          • Namespace — required — (String)

            The namespace of the metric.

          • Dimensions — (Array<map>)

            The dimensions of the metric.

            Conditional: If you published your metric with dimensions, you must specify the same dimensions in your scaling policy.

            • Name — required — (String)

              The name of the dimension.

            • Value — required — (String)

              The value of the dimension.

          • Statistic — required — (String)

            The statistic of the metric.

            Possible values include:
            • "Average"
            • "Minimum"
            • "Maximum"
            • "SampleCount"
            • "Sum"
          • Unit — (String)

            The unit of the metric.

        • ScaleOutCooldown — (Integer)

          The amount of time, in seconds, to wait for a previous scale-out activity to take effect.

          With the scale-out cooldown period, the intention is to continuously (but not excessively) scale out. After Application Auto Scaling successfully scales out using a target tracking scaling policy, it starts to calculate the cooldown time. The scaling policy won't increase the desired capacity again unless either a larger scale out is triggered or the cooldown period ends. While the cooldown period is in effect, the capacity added by the initiating scale-out activity is calculated as part of the desired capacity for the next scale-out activity.

          Application Auto Scaling provides a default value of 600 for Amazon ElastiCache replication groups and a default value of 300 for the following scalable targets:

          • AppStream 2.0 fleets

          • Aurora DB clusters

          • ECS services

          • EMR clusters

          • Neptune clusters

          • SageMaker endpoint variants

          • Spot Fleets

          • Custom resources

          For all other scalable targets, the default value is 0:

          • Amazon Comprehend document classification and entity recognizer endpoints

          • DynamoDB tables and global secondary indexes

          • Amazon Keyspaces tables

          • Lambda provisioned concurrency

          • Amazon MSK broker storage

        • ScaleInCooldown — (Integer)

          The amount of time, in seconds, after a scale-in activity completes before another scale-in activity can start.

          With the scale-in cooldown period, the intention is to scale in conservatively to protect your application’s availability, so scale-in activities are blocked until the cooldown period has expired. However, if another alarm triggers a scale-out activity during the scale-in cooldown period, Application Auto Scaling scales out the target immediately. In this case, the scale-in cooldown period stops and doesn't complete.

          Application Auto Scaling provides a default value of 600 for Amazon ElastiCache replication groups and a default value of 300 for the following scalable targets:

          • AppStream 2.0 fleets

          • Aurora DB clusters

          • ECS services

          • EMR clusters

          • Neptune clusters

          • SageMaker endpoint variants

          • Spot Fleets

          • Custom resources

          For all other scalable targets, the default value is 0:

          • Amazon Comprehend document classification and entity recognizer endpoints

          • DynamoDB tables and global secondary indexes

          • Amazon Keyspaces tables

          • Lambda provisioned concurrency

          • Amazon MSK broker storage

        • DisableScaleIn — (Boolean)

          Indicates whether scale in by the target tracking scaling policy is disabled. If the value is true, scale in is disabled and the target tracking scaling policy won't remove capacity from the scalable target. Otherwise, scale in is enabled and the target tracking scaling policy can remove capacity from the scalable target. The default value is false.

      • Alarms — (Array<map>)

        The CloudWatch alarms associated with the scaling policy.

        • AlarmName — required — (String)

          The name of the alarm.

        • AlarmARN — required — (String)

          The Amazon Resource Name (ARN) of the alarm.

      • CreationTime — required — (Date)

        The Unix timestamp for when the scaling policy was created.

    • NextToken — (String)

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

Returns:

• (AWS.Request) —

  a handle to the operation request for subsequent event callback registration.

var params = {
  ServiceNamespace: ecs | elasticmapreduce | ec2 | appstream | dynamodb | rds | sagemaker | custom-resource | comprehend | lambda | cassandra | kafka | elasticache | neptune, /* required */
  MaxResults: 'NUMBER_VALUE',
  NextToken: 'STRING_VALUE',
  ResourceId: 'STRING_VALUE',
  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 | comprehend:document-classifier-endpoint:DesiredInferenceUnits | comprehend:entity-recognizer-endpoint:DesiredInferenceUnits | lambda:function:ProvisionedConcurrency | cassandra:table:ReadCapacityUnits | cassandra:table:WriteCapacityUnits | kafka:broker-storage:VolumeSize | elasticache:replication-group:NodeGroups | elasticache:replication-group:Replicas | neptune:cluster:ReadReplicaCount,
  ScheduledActionNames: [
    'STRING_VALUE',
    /* more items */
  ]
};
applicationautoscaling.describeScheduledActions(params, function(err, data) {
  if (err) console.log(err, err.stack); // an error occurred
  else     console.log(data);           // successful response
});

Parameters:

• params (Object) (defaults to: {}) —
  • ScheduledActionNames — (Array<String>)

    The names of the scheduled actions to describe.

  • ServiceNamespace — (String)

    The namespace of the Amazon Web Services service that provides the resource. For a resource provided by your own application or service, use custom-resource instead.

    Possible values include:
    • "ecs"
    • "elasticmapreduce"
    • "ec2"
    • "appstream"
    • "dynamodb"
    • "rds"
    • "sagemaker"
    • "custom-resource"
    • "comprehend"
    • "lambda"
    • "cassandra"
    • "kafka"
    • "elasticache"
    • "neptune"
  • ResourceId — (String)

    The identifier of the resource associated with the scheduled action. 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 - 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 table name. Example: table/my-table.

    • DynamoDB global secondary index - The resource type is index and the unique identifier is the index name. 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.

    • SageMaker endpoint variant - 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.

    • Amazon Comprehend document classification endpoint - The resource type and unique identifier are specified using the endpoint ARN. Example: arn:aws:comprehend:us-west-2:123456789012:document-classifier-endpoint/EXAMPLE.

    • Amazon Comprehend entity recognizer endpoint - The resource type and unique identifier are specified using the endpoint ARN. Example: arn:aws:comprehend:us-west-2:123456789012:entity-recognizer-endpoint/EXAMPLE.

    • Lambda provisioned concurrency - The resource type is function and the unique identifier is the function name with a function version or alias name suffix that is not $LATEST. Example: function:my-function:prod or function:my-function:1.

    • Amazon Keyspaces table - The resource type is table and the unique identifier is the table name. Example: keyspace/mykeyspace/table/mytable.

    • Amazon MSK cluster - The resource type and unique identifier are specified using the cluster ARN. Example: arn:aws:kafka:us-east-1:123456789012:cluster/demo-cluster-1/6357e0b2-0e6a-4b86-a0b4-70df934c2e31-5.

    • Amazon ElastiCache replication group - The resource type is replication-group and the unique identifier is the replication group name. Example: replication-group/mycluster.

    • Neptune cluster - The resource type is cluster and the unique identifier is the cluster name. Example: cluster:mycluster.

  • ScalableDimension — (String)

    The scalable dimension. 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.

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

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

    • 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 SageMaker model endpoint variant.

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

    • comprehend:document-classifier-endpoint:DesiredInferenceUnits - The number of inference units for an Amazon Comprehend document classification endpoint.

    • comprehend:entity-recognizer-endpoint:DesiredInferenceUnits - The number of inference units for an Amazon Comprehend entity recognizer endpoint.

    • lambda:function:ProvisionedConcurrency - The provisioned concurrency for a Lambda function.

    • cassandra:table:ReadCapacityUnits - The provisioned read capacity for an Amazon Keyspaces table.

    • cassandra:table:WriteCapacityUnits - The provisioned write capacity for an Amazon Keyspaces table.

    • kafka:broker-storage:VolumeSize - The provisioned volume size (in GiB) for brokers in an Amazon MSK cluster.

    • elasticache:replication-group:NodeGroups - The number of node groups for an Amazon ElastiCache replication group.

    • elasticache:replication-group:Replicas - The number of replicas per node group for an Amazon ElastiCache replication group.

    • neptune:cluster:ReadReplicaCount - The count of read replicas in an Amazon Neptune DB cluster.

    Possible values include:
    • "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"
    • "comprehend:document-classifier-endpoint:DesiredInferenceUnits"
    • "comprehend:entity-recognizer-endpoint:DesiredInferenceUnits"
    • "lambda:function:ProvisionedConcurrency"
    • "cassandra:table:ReadCapacityUnits"
    • "cassandra:table:WriteCapacityUnits"
    • "kafka:broker-storage:VolumeSize"
    • "elasticache:replication-group:NodeGroups"
    • "elasticache:replication-group:Replicas"
    • "neptune:cluster:ReadReplicaCount"
  • MaxResults — (Integer)

    The maximum number of scheduled action results. 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.

  • NextToken — (String)

    The token for the next set of results.

Callback (callback):

• function(err, data) { ... }

  Called when a response from the service is returned. If a callback is not supplied, you must call AWS.Request.send() on the returned request object to initiate the request.

  Context (this):

  • (AWS.Response) —

    the response object containing error, data properties, and the original request object.

  Parameters:

  • err (Error) —

    the error object returned from the request. Set to null if the request is successful.

  • data (Object) —

    the de-serialized data returned from the request. Set to null if a request error occurs. The data object has the following properties:

    • ScheduledActions — (Array<map>)

      Information about the scheduled actions.

      • ScheduledActionName — required — (String)

        The name of the scheduled action.

      • ScheduledActionARN — required — (String)

        The Amazon Resource Name (ARN) of the scheduled action.

      • ServiceNamespace — required — (String)

        The namespace of the Amazon Web Services service that provides the resource, or a custom-resource.

        Possible values include:
        • "ecs"
        • "elasticmapreduce"
        • "ec2"
        • "appstream"
        • "dynamodb"
        • "rds"
        • "sagemaker"
        • "custom-resource"
        • "comprehend"
        • "lambda"
        • "cassandra"
        • "kafka"
        • "elasticache"
        • "neptune"
      • Schedule — required — (String)

        The schedule for this action. The following formats are supported:

        • At expressions - "at(yyyy-mm-ddThh:mm:ss)"

        • Rate expressions - "rate(value unit)"

        • Cron expressions - "cron(fields)"

        At expressions are useful for one-time schedules. Cron expressions are useful for scheduled actions that run periodically at a specified date and time, and rate expressions are useful for scheduled actions that run at a regular interval.

        At and cron expressions use Universal Coordinated Time (UTC) by default.

        The cron format consists of six fields separated by white spaces: [Minutes] [Hours] [Day_of_Month] [Month] [Day_of_Week] [Year].

        For rate expressions, value is a positive integer and unit is minute | minutes | hour | hours | day | days.

        For more information and examples, see Example scheduled actions for Application Auto Scaling in the Application Auto Scaling User Guide.

      • Timezone — (String)

        The time zone used when referring to the date and time of a scheduled action, when the scheduled action uses an at or cron expression.

      • ResourceId — required — (String)

        The identifier of the resource associated with the scaling policy. 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 - 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 table name. Example: table/my-table.

        • DynamoDB global secondary index - The resource type is index and the unique identifier is the index name. 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.

        • SageMaker endpoint variant - 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.

        • Amazon Comprehend document classification endpoint - The resource type and unique identifier are specified using the endpoint ARN. Example: arn:aws:comprehend:us-west-2:123456789012:document-classifier-endpoint/EXAMPLE.

        • Amazon Comprehend entity recognizer endpoint - The resource type and unique identifier are specified using the endpoint ARN. Example: arn:aws:comprehend:us-west-2:123456789012:entity-recognizer-endpoint/EXAMPLE.

        • Lambda provisioned concurrency - The resource type is function and the unique identifier is the function name with a function version or alias name suffix that is not $LATEST. Example: function:my-function:prod or function:my-function:1.

        • Amazon Keyspaces table - The resource type is table and the unique identifier is the table name. Example: keyspace/mykeyspace/table/mytable.

        • Amazon MSK cluster - The resource type and unique identifier are specified using the cluster ARN. Example: arn:aws:kafka:us-east-1:123456789012:cluster/demo-cluster-1/6357e0b2-0e6a-4b86-a0b4-70df934c2e31-5.

        • Amazon ElastiCache replication group - The resource type is replication-group and the unique identifier is the replication group name. Example: replication-group/mycluster.

        • Neptune cluster - The resource type is cluster and the unique identifier is the cluster name. Example: cluster:mycluster.

      • ScalableDimension — (String)

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

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

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

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

        • 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 SageMaker model endpoint variant.

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

        • comprehend:document-classifier-endpoint:DesiredInferenceUnits - The number of inference units for an Amazon Comprehend document classification endpoint.

        • comprehend:entity-recognizer-endpoint:DesiredInferenceUnits - The number of inference units for an Amazon Comprehend entity recognizer endpoint.

        • lambda:function:ProvisionedConcurrency - The provisioned concurrency for a Lambda function.

        • cassandra:table:ReadCapacityUnits - The provisioned read capacity for an Amazon Keyspaces table.

        • cassandra:table:WriteCapacityUnits - The provisioned write capacity for an Amazon Keyspaces table.

        • kafka:broker-storage:VolumeSize - The provisioned volume size (in GiB) for brokers in an Amazon MSK cluster.

        • elasticache:replication-group:NodeGroups - The number of node groups for an Amazon ElastiCache replication group.

        • elasticache:replication-group:Replicas - The number of replicas per node group for an Amazon ElastiCache replication group.

        • neptune:cluster:ReadReplicaCount - The count of read replicas in an Amazon Neptune DB cluster.

        Possible values include:
        • "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"
        • "comprehend:document-classifier-endpoint:DesiredInferenceUnits"
        • "comprehend:entity-recognizer-endpoint:DesiredInferenceUnits"
        • "lambda:function:ProvisionedConcurrency"
        • "cassandra:table:ReadCapacityUnits"
        • "cassandra:table:WriteCapacityUnits"
        • "kafka:broker-storage:VolumeSize"
        • "elasticache:replication-group:NodeGroups"
        • "elasticache:replication-group:Replicas"
        • "neptune:cluster:ReadReplicaCount"
      • StartTime — (Date)

        The date and time that the action is scheduled to begin, in UTC.

      • EndTime — (Date)

        The date and time that the action is scheduled to end, in UTC.

      • ScalableTargetAction — (map)

        The new minimum and maximum capacity. You can set both values or just one. At the scheduled time, if the current capacity is below the minimum capacity, Application Auto Scaling scales out to the minimum capacity. If the current capacity is above the maximum capacity, Application Auto Scaling scales in to the maximum capacity.

        • MinCapacity — (Integer)

          The minimum capacity.

          For certain resources, the minimum value allowed is 0. This includes Lambda provisioned concurrency, Spot Fleet, ECS services, Aurora DB clusters, EMR clusters, and custom resources. For all other resources, the minimum value allowed is 1.

        • MaxCapacity — (Integer)

          The maximum capacity.

          Although you can specify a large maximum capacity, note that service quotas may impose lower limits. Each service has its own default quotas for the maximum capacity of the resource. If you want to specify a higher limit, you can request an increase. For more information, consult the documentation for that service. For information about the default quotas for each service, see Service Endpoints and Quotas in the Amazon Web Services General Reference.

      • CreationTime — required — (Date)

        The date and time that the scheduled action was created.

    • NextToken — (String)

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

Returns:

• (AWS.Request) —

  a handle to the operation request for subsequent event callback registration.

/* The following example applies a target tracking scaling policy with a predefined metric specification to an Amazon ECS service called web-app in the default cluster. The policy keeps the average CPU utilization of the service at 75 percent, with scale-out and scale-in cooldown periods of 60 seconds. */

 var params = {
  PolicyName: "cpu75-target-tracking-scaling-policy", 
  PolicyType: "TargetTrackingScaling", 
  ResourceId: "service/default/web-app", 
  ScalableDimension: "ecs:service:DesiredCount", 
  ServiceNamespace: "ecs", 
  TargetTrackingScalingPolicyConfiguration: {
   PredefinedMetricSpecification: {
    PredefinedMetricType: "ECSServiceAverageCPUUtilization"
   }, 
   ScaleInCooldown: 60, 
   ScaleOutCooldown: 60, 
   TargetValue: 75
  }
 };
 applicationautoscaling.putScalingPolicy(params, function(err, data) {
   if (err) console.log(err, err.stack); // an error occurred
   else     console.log(data);           // successful response
   /*
   data = {
    Alarms: [
       {
      AlarmARN: "arn:aws:cloudwatch:us-west-2:012345678910:alarm:TargetTracking-service/default/web-app-AlarmHigh-d4f0770c-b46e-434a-a60f-3b36d653feca", 
      AlarmName: "TargetTracking-service/default/web-app-AlarmHigh-d4f0770c-b46e-434a-a60f-3b36d653feca"
     }, 
       {
      AlarmARN: "arn:aws:cloudwatch:us-west-2:012345678910:alarm:TargetTracking-service/default/web-app-AlarmLow-1b437334-d19b-4a63-a812-6c67aaf2910d", 
      AlarmName: "TargetTracking-service/default/web-app-AlarmLow-1b437334-d19b-4a63-a812-6c67aaf2910d"
     }
    ], 
    PolicyARN: "arn:aws:autoscaling:us-west-2:012345678910:scalingPolicy:6d8972f3-efc8-437c-92d1-6270f29a66e7:resource/ecs/service/default/web-app:policyName/cpu75-target-tracking-scaling-policy"
   }
   */
 });

var params = {
  PolicyName: 'STRING_VALUE', /* required */
  ResourceId: 'STRING_VALUE', /* required */
  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 | comprehend:document-classifier-endpoint:DesiredInferenceUnits | comprehend:entity-recognizer-endpoint:DesiredInferenceUnits | lambda:function:ProvisionedConcurrency | cassandra:table:ReadCapacityUnits | cassandra:table:WriteCapacityUnits | kafka:broker-storage:VolumeSize | elasticache:replication-group:NodeGroups | elasticache:replication-group:Replicas | neptune:cluster:ReadReplicaCount, /* required */
  ServiceNamespace: ecs | elasticmapreduce | ec2 | appstream | dynamodb | rds | sagemaker | custom-resource | comprehend | lambda | cassandra | kafka | elasticache | neptune, /* required */
  PolicyType: StepScaling | TargetTrackingScaling,
  StepScalingPolicyConfiguration: {
    AdjustmentType: ChangeInCapacity | PercentChangeInCapacity | ExactCapacity,
    Cooldown: 'NUMBER_VALUE',
    MetricAggregationType: Average | Minimum | Maximum,
    MinAdjustmentMagnitude: 'NUMBER_VALUE',
    StepAdjustments: [
      {
        ScalingAdjustment: 'NUMBER_VALUE', /* required */
        MetricIntervalLowerBound: 'NUMBER_VALUE',
        MetricIntervalUpperBound: 'NUMBER_VALUE'
      },
      /* more items */
    ]
  },
  TargetTrackingScalingPolicyConfiguration: {
    TargetValue: 'NUMBER_VALUE', /* required */
    CustomizedMetricSpecification: {
      MetricName: 'STRING_VALUE', /* required */
      Namespace: 'STRING_VALUE', /* required */
      Statistic: Average | Minimum | Maximum | SampleCount | Sum, /* required */
      Dimensions: [
        {
          Name: 'STRING_VALUE', /* required */
          Value: 'STRING_VALUE' /* required */
        },
        /* more items */
      ],
      Unit: 'STRING_VALUE'
    },
    DisableScaleIn: true || false,
    PredefinedMetricSpecification: {
      PredefinedMetricType: DynamoDBReadCapacityUtilization | DynamoDBWriteCapacityUtilization | ALBRequestCountPerTarget | RDSReaderAverageCPUUtilization | RDSReaderAverageDatabaseConnections | EC2SpotFleetRequestAverageCPUUtilization | EC2SpotFleetRequestAverageNetworkIn | EC2SpotFleetRequestAverageNetworkOut | SageMakerVariantInvocationsPerInstance | ECSServiceAverageCPUUtilization | ECSServiceAverageMemoryUtilization | AppStreamAverageCapacityUtilization | ComprehendInferenceUtilization | LambdaProvisionedConcurrencyUtilization | CassandraReadCapacityUtilization | CassandraWriteCapacityUtilization | KafkaBrokerStorageUtilization | ElastiCachePrimaryEngineCPUUtilization | ElastiCacheReplicaEngineCPUUtilization | ElastiCacheDatabaseMemoryUsageCountedForEvictPercentage | NeptuneReaderAverageCPUUtilization, /* required */
      ResourceLabel: 'STRING_VALUE'
    },
    ScaleInCooldown: 'NUMBER_VALUE',
    ScaleOutCooldown: 'NUMBER_VALUE'
  }
};
applicationautoscaling.putScalingPolicy(params, function(err, data) {
  if (err) console.log(err, err.stack); // an error occurred
  else     console.log(data);           // successful response
});

Parameters:

• params (Object) (defaults to: {}) —
  • PolicyName — (String)

    The name of the scaling policy.

  • ServiceNamespace — (String)

    The namespace of the Amazon Web Services service that provides the resource. For a resource provided by your own application or service, use custom-resource instead.

    Possible values include:
    • "ecs"
    • "elasticmapreduce"
    • "ec2"
    • "appstream"
    • "dynamodb"
    • "rds"
    • "sagemaker"
    • "custom-resource"
    • "comprehend"
    • "lambda"
    • "cassandra"
    • "kafka"
    • "elasticache"
    • "neptune"
  • ResourceId — (String)

    The identifier of the resource associated with the scaling policy. 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 - 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 table name. Example: table/my-table.

    • DynamoDB global secondary index - The resource type is index and the unique identifier is the index name. 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.

    • SageMaker endpoint variant - 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.

    • Amazon Comprehend document classification endpoint - The resource type and unique identifier are specified using the endpoint ARN. Example: arn:aws:comprehend:us-west-2:123456789012:document-classifier-endpoint/EXAMPLE.

    • Amazon Comprehend entity recognizer endpoint - The resource type and unique identifier are specified using the endpoint ARN. Example: arn:aws:comprehend:us-west-2:123456789012:entity-recognizer-endpoint/EXAMPLE.

    • Lambda provisioned concurrency - The resource type is function and the unique identifier is the function name with a function version or alias name suffix that is not $LATEST. Example: function:my-function:prod or function:my-function:1.

    • Amazon Keyspaces table - The resource type is table and the unique identifier is the table name. Example: keyspace/mykeyspace/table/mytable.

    • Amazon MSK cluster - The resource type and unique identifier are specified using the cluster ARN. Example: arn:aws:kafka:us-east-1:123456789012:cluster/demo-cluster-1/6357e0b2-0e6a-4b86-a0b4-70df934c2e31-5.

    • Amazon ElastiCache replication group - The resource type is replication-group and the unique identifier is the replication group name. Example: replication-group/mycluster.

    • Neptune cluster - The resource type is cluster and the unique identifier is the cluster name. Example: cluster:mycluster.

  • ScalableDimension — (String)

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

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

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

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

    • 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 SageMaker model endpoint variant.

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

    • comprehend:document-classifier-endpoint:DesiredInferenceUnits - The number of inference units for an Amazon Comprehend document classification endpoint.

    • comprehend:entity-recognizer-endpoint:DesiredInferenceUnits - The number of inference units for an Amazon Comprehend entity recognizer endpoint.

    • lambda:function:ProvisionedConcurrency - The provisioned concurrency for a Lambda function.

    • cassandra:table:ReadCapacityUnits - The provisioned read capacity for an Amazon Keyspaces table.

    • cassandra:table:WriteCapacityUnits - The provisioned write capacity for an Amazon Keyspaces table.

    • kafka:broker-storage:VolumeSize - The provisioned volume size (in GiB) for brokers in an Amazon MSK cluster.

    • elasticache:replication-group:NodeGroups - The number of node groups for an Amazon ElastiCache replication group.

    • elasticache:replication-group:Replicas - The number of replicas per node group for an Amazon ElastiCache replication group.

    • neptune:cluster:ReadReplicaCount - The count of read replicas in an Amazon Neptune DB cluster.

    Possible values include:
    • "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"
    • "comprehend:document-classifier-endpoint:DesiredInferenceUnits"
    • "comprehend:entity-recognizer-endpoint:DesiredInferenceUnits"
    • "lambda:function:ProvisionedConcurrency"
    • "cassandra:table:ReadCapacityUnits"
    • "cassandra:table:WriteCapacityUnits"
    • "kafka:broker-storage:VolumeSize"
    • "elasticache:replication-group:NodeGroups"
    • "elasticache:replication-group:Replicas"
    • "neptune:cluster:ReadReplicaCount"
  • PolicyType — (String)

    The policy type. This parameter is required if you are creating a scaling policy.

    The following policy types are supported:

    TargetTrackingScaling—Not supported for Amazon EMR

    StepScaling—Not supported for DynamoDB, Amazon Comprehend, Lambda, Amazon Keyspaces, Amazon MSK, Amazon ElastiCache, or Neptune.

    For more information, see Target tracking scaling policies and Step scaling policies in the Application Auto Scaling User Guide.

    Possible values include:
    • "StepScaling"
    • "TargetTrackingScaling"
  • StepScalingPolicyConfiguration — (map)

    A step scaling policy.

    This parameter is required if you are creating a policy and the policy type is StepScaling.

    • AdjustmentType — (String)

      Specifies how the ScalingAdjustment value in a StepAdjustment is interpreted (for example, an absolute number or a percentage). The valid values are ChangeInCapacity, ExactCapacity, and PercentChangeInCapacity.

      AdjustmentType is required if you are adding a new step scaling policy configuration.

      Possible values include:
      • "ChangeInCapacity"
      • "PercentChangeInCapacity"
      • "ExactCapacity"
    • StepAdjustments — (Array<map>)

      A set of adjustments that enable you to scale based on the size of the alarm breach.

      At least one step adjustment is required if you are adding a new step scaling policy configuration.

      • MetricIntervalLowerBound — (Float)

        The lower bound for the difference between the alarm threshold and the CloudWatch metric. If the metric value is above the breach threshold, the lower bound is inclusive (the metric must be greater than or equal to the threshold plus the lower bound). Otherwise, it is exclusive (the metric must be greater than the threshold plus the lower bound). A null value indicates negative infinity.

      • MetricIntervalUpperBound — (Float)

        The upper bound for the difference between the alarm threshold and the CloudWatch metric. If the metric value is above the breach threshold, the upper bound is exclusive (the metric must be less than the threshold plus the upper bound). Otherwise, it is inclusive (the metric must be less than or equal to the threshold plus the upper bound). A null value indicates positive infinity.

        The upper bound must be greater than the lower bound.

      • ScalingAdjustment — required — (Integer)

        The amount by which to scale, based on the specified adjustment type. A positive value adds to the current capacity while a negative number removes from the current capacity. For exact capacity, you must specify a positive value.

    • MinAdjustmentMagnitude — (Integer)

      The minimum value to scale by when the adjustment type is PercentChangeInCapacity. For example, suppose that you create a step scaling policy to scale out an Amazon ECS service by 25 percent and you specify a MinAdjustmentMagnitude of 2. If the service has 4 tasks and the scaling policy is performed, 25 percent of 4 is 1. However, because you specified a MinAdjustmentMagnitude of 2, Application Auto Scaling scales out the service by 2 tasks.

    • Cooldown — (Integer)

      The amount of time, in seconds, to wait for a previous scaling activity to take effect.

      With scale-out policies, the intention is to continuously (but not excessively) scale out. After Application Auto Scaling successfully scales out using a step scaling policy, it starts to calculate the cooldown time. The scaling policy won't increase the desired capacity again unless either a larger scale out is triggered or the cooldown period ends. While the cooldown period is in effect, capacity added by the initiating scale-out activity is calculated as part of the desired capacity for the next scale-out activity. For example, when an alarm triggers a step scaling policy to increase the capacity by 2, the scaling activity completes successfully, and a cooldown period starts. If the alarm triggers again during the cooldown period but at a more aggressive step adjustment of 3, the previous increase of 2 is considered part of the current capacity. Therefore, only 1 is added to the capacity.

      With scale-in policies, the intention is to scale in conservatively to protect your application’s availability, so scale-in activities are blocked until the cooldown period has expired. However, if another alarm triggers a scale-out activity during the cooldown period after a scale-in activity, Application Auto Scaling scales out the target immediately. In this case, the cooldown period for the scale-in activity stops and doesn't complete.

      Application Auto Scaling provides a default value of 600 for Amazon ElastiCache replication groups and a default value of 300 for the following scalable targets:

      • AppStream 2.0 fleets

      • Aurora DB clusters

      • ECS services

      • EMR clusters

      • Neptune clusters

      • SageMaker endpoint variants

      • Spot Fleets

      • Custom resources

      For all other scalable targets, the default value is 0:

      • Amazon Comprehend document classification and entity recognizer endpoints

      • DynamoDB tables and global secondary indexes

      • Amazon Keyspaces tables

      • Lambda provisioned concurrency

      • Amazon MSK broker storage

    • MetricAggregationType — (String)

      The aggregation type for the CloudWatch metrics. Valid values are Minimum, Maximum, and Average. If the aggregation type is null, the value is treated as Average.

      Possible values include:
      • "Average"
      • "Minimum"
      • "Maximum"
  • TargetTrackingScalingPolicyConfiguration — (map)

    A target tracking scaling policy. Includes support for predefined or customized metrics.

    This parameter is required if you are creating a policy and the policy type is TargetTrackingScaling.

    • TargetValue — required — (Float)

      The target value for the metric. Although this property accepts numbers of type Double, it won't accept values that are either too small or too large. Values must be in the range of -2³⁶⁰ to 2³⁶⁰. The value must be a valid number based on the choice of metric. For example, if the metric is CPU utilization, then the target value is a percent value that represents how much of the CPU can be used before scaling out.

    • PredefinedMetricSpecification — (map)

      A predefined metric. You can specify either a predefined metric or a customized metric.

      • PredefinedMetricType — required — (String)

        The metric type. The ALBRequestCountPerTarget metric type applies only to Spot Fleet requests and ECS services.

        Possible values include:
        • "DynamoDBReadCapacityUtilization"
        • "DynamoDBWriteCapacityUtilization"
        • "ALBRequestCountPerTarget"
        • "RDSReaderAverageCPUUtilization"
        • "RDSReaderAverageDatabaseConnections"
        • "EC2SpotFleetRequestAverageCPUUtilization"
        • "EC2SpotFleetRequestAverageNetworkIn"
        • "EC2SpotFleetRequestAverageNetworkOut"
        • "SageMakerVariantInvocationsPerInstance"
        • "ECSServiceAverageCPUUtilization"
        • "ECSServiceAverageMemoryUtilization"
        • "AppStreamAverageCapacityUtilization"
        • "ComprehendInferenceUtilization"
        • "LambdaProvisionedConcurrencyUtilization"
        • "CassandraReadCapacityUtilization"
        • "CassandraWriteCapacityUtilization"
        • "KafkaBrokerStorageUtilization"
        • "ElastiCachePrimaryEngineCPUUtilization"
        • "ElastiCacheReplicaEngineCPUUtilization"
        • "ElastiCacheDatabaseMemoryUsageCountedForEvictPercentage"
        • "NeptuneReaderAverageCPUUtilization"
      • ResourceLabel — (String)

        Identifies the resource associated with the metric type. You can't specify a resource label unless the metric type is ALBRequestCountPerTarget and there is a target group attached to the Spot Fleet request or ECS service.

        You create the resource label by appending the final portion of the load balancer ARN and the final portion of the target group ARN into a single value, separated by a forward slash (/). The format of the resource label is:

        app/my-alb/778d41231b141a0f/targetgroup/my-alb-target-group/943f017f100becff.

        Where:

        • app/<load-balancer-name>/<load-balancer-id> is the final portion of the load balancer ARN

        • targetgroup/<target-group-name>/<target-group-id> is the final portion of the target group ARN.

        To find the ARN for an Application Load Balancer, use the DescribeLoadBalancers API operation. To find the ARN for the target group, use the DescribeTargetGroups API operation.

    • CustomizedMetricSpecification — (map)

      A customized metric. You can specify either a predefined metric or a customized metric.

      • MetricName — required — (String)

        The name of the metric.

      • Namespace — required — (String)

        The namespace of the metric.

      • Dimensions — (Array<map>)

        The dimensions of the metric.

        Conditional: If you published your metric with dimensions, you must specify the same dimensions in your scaling policy.

        • Name — required — (String)

          The name of the dimension.

        • Value — required — (String)

          The value of the dimension.

      • Statistic — required — (String)

        The statistic of the metric.

        Possible values include:
        • "Average"
        • "Minimum"
        • "Maximum"
        • "SampleCount"
        • "Sum"
      • Unit — (String)

        The unit of the metric.

    • ScaleOutCooldown — (Integer)

      The amount of time, in seconds, to wait for a previous scale-out activity to take effect.

      With the scale-out cooldown period, the intention is to continuously (but not excessively) scale out. After Application Auto Scaling successfully scales out using a target tracking scaling policy, it starts to calculate the cooldown time. The scaling policy won't increase the desired capacity again unless either a larger scale out is triggered or the cooldown period ends. While the cooldown period is in effect, the capacity added by the initiating scale-out activity is calculated as part of the desired capacity for the next scale-out activity.

      Application Auto Scaling provides a default value of 600 for Amazon ElastiCache replication groups and a default value of 300 for the following scalable targets:

      • AppStream 2.0 fleets

      • Aurora DB clusters

      • ECS services

      • EMR clusters

      • Neptune clusters

      • SageMaker endpoint variants

      • Spot Fleets

      • Custom resources

      For all other scalable targets, the default value is 0:

      • Amazon Comprehend document classification and entity recognizer endpoints

      • DynamoDB tables and global secondary indexes

      • Amazon Keyspaces tables

      • Lambda provisioned concurrency

      • Amazon MSK broker storage

    • ScaleInCooldown — (Integer)

      The amount of time, in seconds, after a scale-in activity completes before another scale-in activity can start.

      With the scale-in cooldown period, the intention is to scale in conservatively to protect your application’s availability, so scale-in activities are blocked until the cooldown period has expired. However, if another alarm triggers a scale-out activity during the scale-in cooldown period, Application Auto Scaling scales out the target immediately. In this case, the scale-in cooldown period stops and doesn't complete.

      Application Auto Scaling provides a default value of 600 for Amazon ElastiCache replication groups and a default value of 300 for the following scalable targets:

      • AppStream 2.0 fleets

      • Aurora DB clusters

      • ECS services

      • EMR clusters

      • Neptune clusters

      • SageMaker endpoint variants

      • Spot Fleets

      • Custom resources

      For all other scalable targets, the default value is 0:

      • Amazon Comprehend document classification and entity recognizer endpoints

      • DynamoDB tables and global secondary indexes

      • Amazon Keyspaces tables

      • Lambda provisioned concurrency

      • Amazon MSK broker storage

    • DisableScaleIn — (Boolean)

      Indicates whether scale in by the target tracking scaling policy is disabled. If the value is true, scale in is disabled and the target tracking scaling policy won't remove capacity from the scalable target. Otherwise, scale in is enabled and the target tracking scaling policy can remove capacity from the scalable target. The default value is false.

Callback (callback):

• function(err, data) { ... }

  Called when a response from the service is returned. If a callback is not supplied, you must call AWS.Request.send() on the returned request object to initiate the request.

  Context (this):

  • (AWS.Response) —

    the response object containing error, data properties, and the original request object.

  Parameters:

  • err (Error) —

    the error object returned from the request. Set to null if the request is successful.

  • data (Object) —

    the de-serialized data returned from the request. Set to null if a request error occurs. The data object has the following properties:

    • PolicyARN — (String)

      The Amazon Resource Name (ARN) of the resulting scaling policy.

    • Alarms — (Array<map>)

      The CloudWatch alarms created for the target tracking scaling policy.

      • AlarmName — required — (String)

        The name of the alarm.

      • AlarmARN — required — (String)

        The Amazon Resource Name (ARN) of the alarm.

Returns:

• (AWS.Request) —

  a handle to the operation request for subsequent event callback registration.

var params = {
  ResourceId: 'STRING_VALUE', /* required */
  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 | comprehend:document-classifier-endpoint:DesiredInferenceUnits | comprehend:entity-recognizer-endpoint:DesiredInferenceUnits | lambda:function:ProvisionedConcurrency | cassandra:table:ReadCapacityUnits | cassandra:table:WriteCapacityUnits | kafka:broker-storage:VolumeSize | elasticache:replication-group:NodeGroups | elasticache:replication-group:Replicas | neptune:cluster:ReadReplicaCount, /* required */
  ScheduledActionName: 'STRING_VALUE', /* required */
  ServiceNamespace: ecs | elasticmapreduce | ec2 | appstream | dynamodb | rds | sagemaker | custom-resource | comprehend | lambda | cassandra | kafka | elasticache | neptune, /* required */
  EndTime: new Date || 'Wed Dec 31 1969 16:00:00 GMT-0800 (PST)' || 123456789,
  ScalableTargetAction: {
    MaxCapacity: 'NUMBER_VALUE',
    MinCapacity: 'NUMBER_VALUE'
  },
  Schedule: 'STRING_VALUE',
  StartTime: new Date || 'Wed Dec 31 1969 16:00:00 GMT-0800 (PST)' || 123456789,
  Timezone: 'STRING_VALUE'
};
applicationautoscaling.putScheduledAction(params, function(err, data) {
  if (err) console.log(err, err.stack); // an error occurred
  else     console.log(data);           // successful response
});

Parameters:

• params (Object) (defaults to: {}) —
  • ServiceNamespace — (String)

    The namespace of the Amazon Web Services service that provides the resource. For a resource provided by your own application or service, use custom-resource instead.

    Possible values include:
    • "ecs"
    • "elasticmapreduce"
    • "ec2"
    • "appstream"
    • "dynamodb"
    • "rds"
    • "sagemaker"
    • "custom-resource"
    • "comprehend"
    • "lambda"
    • "cassandra"
    • "kafka"
    • "elasticache"
    • "neptune"
  • Schedule — (String)

    The schedule for this action. The following formats are supported:

    • At expressions - "at(yyyy-mm-ddThh:mm:ss)"

    • Rate expressions - "rate(value unit)"

    • Cron expressions - "cron(fields)"

    At expressions are useful for one-time schedules. Cron expressions are useful for scheduled actions that run periodically at a specified date and time, and rate expressions are useful for scheduled actions that run at a regular interval.

    At and cron expressions use Universal Coordinated Time (UTC) by default.

    The cron format consists of six fields separated by white spaces: [Minutes] [Hours] [Day_of_Month] [Month] [Day_of_Week] [Year].

    For rate expressions, value is a positive integer and unit is minute | minutes | hour | hours | day | days.

    For more information and examples, see Example scheduled actions for Application Auto Scaling in the Application Auto Scaling User Guide.

  • Timezone — (String)

    Specifies the time zone used when setting a scheduled action by using an at or cron expression. If a time zone is not provided, UTC is used by default.

    Valid values are the canonical names of the IANA time zones supported by Joda-Time (such as Etc/GMT+9 or Pacific/Tahiti). For more information, see https://www.joda.org/joda-time/timezones.html.

  • ScheduledActionName — (String)

    The name of the scheduled action. This name must be unique among all other scheduled actions on the specified scalable target.

  • ResourceId — (String)

    The identifier of the resource associated with the scheduled action. 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 - 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 table name. Example: table/my-table.

    • DynamoDB global secondary index - The resource type is index and the unique identifier is the index name. 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.

    • SageMaker endpoint variant - 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.

    • Amazon Comprehend document classification endpoint - The resource type and unique identifier are specified using the endpoint ARN. Example: arn:aws:comprehend:us-west-2:123456789012:document-classifier-endpoint/EXAMPLE.

    • Amazon Comprehend entity recognizer endpoint - The resource type and unique identifier are specified using the endpoint ARN. Example: arn:aws:comprehend:us-west-2:123456789012:entity-recognizer-endpoint/EXAMPLE.

    • Lambda provisioned concurrency - The resource type is function and the unique identifier is the function name with a function version or alias name suffix that is not $LATEST. Example: function:my-function:prod or function:my-function:1.

    • Amazon Keyspaces table - The resource type is table and the unique identifier is the table name. Example: keyspace/mykeyspace/table/mytable.

    • Amazon MSK cluster - The resource type and unique identifier are specified using the cluster ARN. Example: arn:aws:kafka:us-east-1:123456789012:cluster/demo-cluster-1/6357e0b2-0e6a-4b86-a0b4-70df934c2e31-5.

    • Amazon ElastiCache replication group - The resource type is replication-group and the unique identifier is the replication group name. Example: replication-group/mycluster.

    • Neptune cluster - The resource type is cluster and the unique identifier is the cluster name. Example: cluster:mycluster.

  • ScalableDimension — (String)

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

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

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

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

    • 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 SageMaker model endpoint variant.

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

    • comprehend:document-classifier-endpoint:DesiredInferenceUnits - The number of inference units for an Amazon Comprehend document classification endpoint.

    • comprehend:entity-recognizer-endpoint:DesiredInferenceUnits - The number of inference units for an Amazon Comprehend entity recognizer endpoint.

    • lambda:function:ProvisionedConcurrency - The provisioned concurrency for a Lambda function.

    • cassandra:table:ReadCapacityUnits - The provisioned read capacity for an Amazon Keyspaces table.

    • cassandra:table:WriteCapacityUnits - The provisioned write capacity for an Amazon Keyspaces table.

    • kafka:broker-storage:VolumeSize - The provisioned volume size (in GiB) for brokers in an Amazon MSK cluster.

    • elasticache:replication-group:NodeGroups - The number of node groups for an Amazon ElastiCache replication group.

    • elasticache:replication-group:Replicas - The number of replicas per node group for an Amazon ElastiCache replication group.

    • neptune:cluster:ReadReplicaCount - The count of read replicas in an Amazon Neptune DB cluster.

    Possible values include:
    • "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"
    • "comprehend:document-classifier-endpoint:DesiredInferenceUnits"
    • "comprehend:entity-recognizer-endpoint:DesiredInferenceUnits"
    • "lambda:function:ProvisionedConcurrency"
    • "cassandra:table:ReadCapacityUnits"
    • "cassandra:table:WriteCapacityUnits"
    • "kafka:broker-storage:VolumeSize"
    • "elasticache:replication-group:NodeGroups"
    • "elasticache:replication-group:Replicas"
    • "neptune:cluster:ReadReplicaCount"
  • StartTime — (Date)

    The date and time for this scheduled action to start, in UTC.

  • EndTime — (Date)

    The date and time for the recurring schedule to end, in UTC.

  • ScalableTargetAction — (map)

    The new minimum and maximum capacity. You can set both values or just one. At the scheduled time, if the current capacity is below the minimum capacity, Application Auto Scaling scales out to the minimum capacity. If the current capacity is above the maximum capacity, Application Auto Scaling scales in to the maximum capacity.

    • MinCapacity — (Integer)

      The minimum capacity.

      For certain resources, the minimum value allowed is 0. This includes Lambda provisioned concurrency, Spot Fleet, ECS services, Aurora DB clusters, EMR clusters, and custom resources. For all other resources, the minimum value allowed is 1.

    • MaxCapacity — (Integer)

      The maximum capacity.

      Although you can specify a large maximum capacity, note that service quotas may impose lower limits. Each service has its own default quotas for the maximum capacity of the resource. If you want to specify a higher limit, you can request an increase. For more information, consult the documentation for that service. For information about the default quotas for each service, see Service Endpoints and Quotas in the Amazon Web Services General Reference.

Callback (callback):

• function(err, data) { ... }

  Called when a response from the service is returned. If a callback is not supplied, you must call AWS.Request.send() on the returned request object to initiate the request.

  Context (this):

  • (AWS.Response) —

    the response object containing error, data properties, and the original request object.

  Parameters:

  • err (Error) —

    the error object returned from the request. Set to null if the request is successful.

  • data (Object) —

    the de-serialized data returned from the request. Set to null if a request error occurs.

Returns:

• (AWS.Request) —

  a handle to the operation request for subsequent event callback registration.

/* This example registers a scalable target from an Amazon ECS service called web-app that is running on the default cluster, with a minimum desired count of 1 task and a maximum desired count of 10 tasks. */

 var params = {
  MaxCapacity: 10, 
  MinCapacity: 1, 
  ResourceId: "service/default/web-app", 
  ScalableDimension: "ecs:service:DesiredCount", 
  ServiceNamespace: "ecs"
 };
 applicationautoscaling.registerScalableTarget(params, function(err, data) {
   if (err) console.log(err, err.stack); // an error occurred
   else     console.log(data);           // successful response
   /*
   data = {
   }
   */
 });

var params = {
  ResourceId: 'STRING_VALUE', /* required */
  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 | comprehend:document-classifier-endpoint:DesiredInferenceUnits | comprehend:entity-recognizer-endpoint:DesiredInferenceUnits | lambda:function:ProvisionedConcurrency | cassandra:table:ReadCapacityUnits | cassandra:table:WriteCapacityUnits | kafka:broker-storage:VolumeSize | elasticache:replication-group:NodeGroups | elasticache:replication-group:Replicas | neptune:cluster:ReadReplicaCount, /* required */
  ServiceNamespace: ecs | elasticmapreduce | ec2 | appstream | dynamodb | rds | sagemaker | custom-resource | comprehend | lambda | cassandra | kafka | elasticache | neptune, /* required */
  MaxCapacity: 'NUMBER_VALUE',
  MinCapacity: 'NUMBER_VALUE',
  RoleARN: 'STRING_VALUE',
  SuspendedState: {
    DynamicScalingInSuspended: true || false,
    DynamicScalingOutSuspended: true || false,
    ScheduledScalingSuspended: true || false
  }
};
applicationautoscaling.registerScalableTarget(params, function(err, data) {
  if (err) console.log(err, err.stack); // an error occurred
  else     console.log(data);           // successful response
});

Parameters:

• params (Object) (defaults to: {}) —
  • ServiceNamespace — (String)

    The namespace of the Amazon Web Services service that provides the resource. For a resource provided by your own application or service, use custom-resource instead.

    Possible values include:
    • "ecs"
    • "elasticmapreduce"
    • "ec2"
    • "appstream"
    • "dynamodb"
    • "rds"
    • "sagemaker"
    • "custom-resource"
    • "comprehend"
    • "lambda"
    • "cassandra"
    • "kafka"
    • "elasticache"
    • "neptune"
  • ResourceId — (String)

    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 - 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 table name. Example: table/my-table.

    • DynamoDB global secondary index - The resource type is index and the unique identifier is the index name. 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.

    • SageMaker endpoint variant - 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.

    • Amazon Comprehend document classification endpoint - The resource type and unique identifier are specified using the endpoint ARN. Example: arn:aws:comprehend:us-west-2:123456789012:document-classifier-endpoint/EXAMPLE.

    • Amazon Comprehend entity recognizer endpoint - The resource type and unique identifier are specified using the endpoint ARN. Example: arn:aws:comprehend:us-west-2:123456789012:entity-recognizer-endpoint/EXAMPLE.

    • Lambda provisioned concurrency - The resource type is function and the unique identifier is the function name with a function version or alias name suffix that is not $LATEST. Example: function:my-function:prod or function:my-function:1.

    • Amazon Keyspaces table - The resource type is table and the unique identifier is the table name. Example: keyspace/mykeyspace/table/mytable.

    • Amazon MSK cluster - The resource type and unique identifier are specified using the cluster ARN. Example: arn:aws:kafka:us-east-1:123456789012:cluster/demo-cluster-1/6357e0b2-0e6a-4b86-a0b4-70df934c2e31-5.

    • Amazon ElastiCache replication group - The resource type is replication-group and the unique identifier is the replication group name. Example: replication-group/mycluster.

    • Neptune cluster - The resource type is cluster and the unique identifier is the cluster name. Example: cluster:mycluster.

  • 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.

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

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

    • 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 SageMaker model endpoint variant.

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

    • comprehend:document-classifier-endpoint:DesiredInferenceUnits - The number of inference units for an Amazon Comprehend document classification endpoint.

    • comprehend:entity-recognizer-endpoint:DesiredInferenceUnits - The number of inference units for an Amazon Comprehend entity recognizer endpoint.

    • lambda:function:ProvisionedConcurrency - The provisioned concurrency for a Lambda function.

    • cassandra:table:ReadCapacityUnits - The provisioned read capacity for an Amazon Keyspaces table.

    • cassandra:table:WriteCapacityUnits - The provisioned write capacity for an Amazon Keyspaces table.

    • kafka:broker-storage:VolumeSize - The provisioned volume size (in GiB) for brokers in an Amazon MSK cluster.

    • elasticache:replication-group:NodeGroups - The number of node groups for an Amazon ElastiCache replication group.

    • elasticache:replication-group:Replicas - The number of replicas per node group for an Amazon ElastiCache replication group.

    • neptune:cluster:ReadReplicaCount - The count of read replicas in an Amazon Neptune DB cluster.

    Possible values include:
    • "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"
    • "comprehend:document-classifier-endpoint:DesiredInferenceUnits"
    • "comprehend:entity-recognizer-endpoint:DesiredInferenceUnits"
    • "lambda:function:ProvisionedConcurrency"
    • "cassandra:table:ReadCapacityUnits"
    • "cassandra:table:WriteCapacityUnits"
    • "kafka:broker-storage:VolumeSize"
    • "elasticache:replication-group:NodeGroups"
    • "elasticache:replication-group:Replicas"
    • "neptune:cluster:ReadReplicaCount"
  • MinCapacity — (Integer)

    The minimum value that you plan to scale in to. When a scaling policy is in effect, Application Auto Scaling can scale in (contract) as needed to the minimum capacity limit in response to changing demand. This property is required when registering a new scalable target.

    For certain resources, the minimum value allowed is 0. This includes Lambda provisioned concurrency, Spot Fleet, ECS services, Aurora DB clusters, EMR clusters, and custom resources. For all other resources, the minimum value allowed is 1.

  • MaxCapacity — (Integer)

    The maximum value that you plan to scale out to. When a scaling policy is in effect, Application Auto Scaling can scale out (expand) as needed to the maximum capacity limit in response to changing demand. This property is required when registering a new scalable target.

    Although you can specify a large maximum capacity, note that service quotas may impose lower limits. Each service has its own default quotas for the maximum capacity of the resource. If you want to specify a higher limit, you can request an increase. For more information, consult the documentation for that service. For information about the default quotas for each service, see Service Endpoints and Quotas in the Amazon Web Services General Reference.

  • RoleARN — (String)

    This parameter is required for services that do not support service-linked roles (such as Amazon EMR), and it must specify the ARN of an IAM role that allows Application Auto Scaling to modify the scalable target on your behalf.

    If the service supports service-linked roles, Application Auto Scaling uses a service-linked role, which it creates if it does not yet exist. For more information, see Application Auto Scaling IAM roles.

  • SuspendedState — (map)

    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 Suspending and resuming 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.

Callback (callback):

• function(err, data) { ... }

  Called when a response from the service is returned. If a callback is not supplied, you must call AWS.Request.send() on the returned request object to initiate the request.

  Context (this):

  • (AWS.Response) —

    the response object containing error, data properties, and the original request object.

  Parameters:

  • err (Error) —

    the error object returned from the request. Set to null if the request is successful.

  • data (Object) —

    the de-serialized data returned from the request. Set to null if a request error occurs.

Returns:

• (AWS.Request) —

  a handle to the operation request for subsequent event callback registration.