Class: AWS.ApplicationAutoScaling

Inherits:

AWS.Service

• Object
• AWS.Service
• AWS.ApplicationAutoScaling

Identifier:

applicationautoscaling

API Version:

2016-02-06

Defined in:

(unknown)

Overview

Constructs a service interface object. Each API operation is exposed as a function on service.

Service Description

With Application Auto Scaling, you can configure automatic scaling for the following resources:

• Amazon ECS services

• Amazon EC2 Spot Fleet requests

• Amazon EMR clusters

• Amazon AppStream 2.0 fleets

• Amazon DynamoDB tables and global secondary indexes throughput capacity

• Amazon Aurora Replicas

• Amazon SageMaker endpoint variants

• Custom resources provided by your own applications or services

• Amazon Comprehend document classification endpoints

• AWS Lambda function provisioned concurrency

API Summary

The Application Auto Scaling service API includes three key sets of actions:

• Register and manage scalable targets - Register AWS or custom resources as scalable targets (a resource that Application Auto Scaling can scale), set minimum and maximum capacity limits, and retrieve information on existing scalable targets.

• Configure and manage automatic scaling - Define scaling policies to dynamically scale your resources in response to CloudWatch alarms, schedule one-time or recurring scaling actions, and retrieve your recent scaling activity history.

• Suspend and resume scaling - Temporarily suspend and later resume automatic scaling by calling the RegisterScalableTarget action for any Application Auto Scaling scalable target. You can suspend and resume, individually or in combination, scale-out activities triggered by a scaling policy, scale-in activities triggered by a scaling policy, and scheduled scaling.

To learn more about Application Auto Scaling, including information about granting IAM users required permissions for Application Auto Scaling actions, see the Application Auto Scaling User Guide.

Sending a Request Using ApplicationAutoScaling

var applicationautoscaling = new AWS.ApplicationAutoScaling();
applicationautoscaling.deregisterScalableTarget(params, function (err, data) {
  if (err) console.log(err, err.stack); // an error occurred
  else     console.log(data);           // successful response
});

Locking the API Version

In order to ensure that the ApplicationAutoScaling object uses this specific API, you can construct the object by passing the apiVersion option to the constructor:

var applicationautoscaling = new AWS.ApplicationAutoScaling({apiVersion: '2016-02-06'});

You can also set the API version globally in AWS.config.apiVersions using the applicationautoscaling service identifier:

AWS.config.apiVersions = {
  applicationautoscaling: '2016-02-06',
  // other service API versions
};

var applicationautoscaling = new AWS.ApplicationAutoScaling();

Version:

• 2016-02-06

Constructor Summary

• new AWS.ApplicationAutoScaling(options = {}) ⇒ Object constructor

  Constructs a service object.

Property Summary

• endpoint ⇒ AWS.Endpoint readwrite

  An Endpoint object representing the endpoint URL for service requests.

Properties inherited from AWS.Service

apiVersions

Method Summary

• deleteScalingPolicy(params = {}, callback) ⇒ AWS.Request

  Deletes the specified scaling policy for an Application Auto Scaling scalable target.

• deleteScheduledAction(params = {}, callback) ⇒ AWS.Request

  Deletes the specified scheduled action for an Application Auto Scaling scalable target.

• deregisterScalableTarget(params = {}, callback) ⇒ AWS.Request

  Deregisters an Application Auto Scaling scalable target.

• describeScalableTargets(params = {}, callback) ⇒ AWS.Request

  Gets information about the scalable targets in the specified namespace.

• describeScalingActivities(params = {}, callback) ⇒ AWS.Request

  Provides descriptive information about the scaling activities in the specified namespace from the previous six weeks.

• describeScalingPolicies(params = {}, callback) ⇒ AWS.Request

  Describes the Application Auto Scaling scaling policies for the specified service namespace.

• describeScheduledActions(params = {}, callback) ⇒ AWS.Request

  Describes the Application Auto Scaling scheduled actions for the specified service namespace.

• putScalingPolicy(params = {}, callback) ⇒ AWS.Request

  Creates or updates a policy for an Application Auto Scaling scalable target.

• putScheduledAction(params = {}, callback) ⇒ AWS.Request

  Creates or updates a scheduled action for an Application Auto Scaling scalable target.

• registerScalableTarget(params = {}, callback) ⇒ AWS.Request

  Registers or updates a scalable target.

Methods inherited from AWS.Service

makeRequest, makeUnauthenticatedRequest, waitFor, setupRequestListeners, defineService

Constructor Details

new AWS.ApplicationAutoScaling(options = {}) ⇒ Object

Constructs a service object. This object has one method for each API operation.

Examples:

Constructing a ApplicationAutoScaling object

var applicationautoscaling = new AWS.ApplicationAutoScaling({apiVersion: '2016-02-06'});

Options Hash (options):

• params (map) —

  An optional map of parameters to bind to every request sent by this service object. For more information on bound parameters, see "Working with Services" in the Getting Started Guide.

• endpoint (String) —

  The endpoint URI to send requests to. The default endpoint is built from the configured region. The endpoint should be a string like 'https://{service}.{region}.amazonaws.com'.

• accessKeyId (String) —

  your AWS access key ID.

• secretAccessKey (String) —

  your AWS secret access key.

• sessionToken (AWS.Credentials) —

  the optional AWS session token to sign requests with.

• credentials (AWS.Credentials) —

  the AWS credentials to sign requests with. You can either specify this object, or specify the accessKeyId and secretAccessKey options directly.

• credentialProvider (AWS.CredentialProviderChain) —

  the provider chain used to resolve credentials if no static credentials property is set.

• region (String) —

  the region to send service requests to. See AWS.ApplicationAutoScaling.region for more information.

• maxRetries (Integer) —

  the maximum amount of retries to attempt with a request. See AWS.ApplicationAutoScaling.maxRetries for more information.

• maxRedirects (Integer) —

  the maximum amount of redirects to follow with a request. See AWS.ApplicationAutoScaling.maxRedirects for more information.

• sslEnabled (Boolean) —

  whether to enable SSL for requests.

• paramValidation (Boolean|map) —

  whether input parameters should be validated against the operation description before sending the request. Defaults to true. Pass a map to enable any of the following specific validation features:

  • min [Boolean] — Validates that a value meets the min constraint. This is enabled by default when paramValidation is set to true.
  • max [Boolean] — Validates that a value meets the max constraint.
  • pattern [Boolean] — Validates that a string value matches a regular expression.
  • enum [Boolean] — Validates that a string value matches one of the allowable enum values.
• computeChecksums (Boolean) —

  whether to compute checksums for payload bodies when the service accepts it (currently supported in S3 only)

• convertResponseTypes (Boolean) —

  whether types are converted when parsing response data. Currently only supported for JSON based services. Turning this off may improve performance on large response payloads. Defaults to true.

• correctClockSkew (Boolean) —

  whether to apply a clock skew correction and retry requests that fail because of an skewed client clock. Defaults to false.

• s3ForcePathStyle (Boolean) —

  whether to force path style URLs for S3 objects.

• s3BucketEndpoint (Boolean) —

  whether the provided endpoint addresses an individual bucket (false if it addresses the root API endpoint). Note that setting this configuration option requires an endpoint to be provided explicitly to the service constructor.

• s3DisableBodySigning (Boolean) —

  whether S3 body signing should be disabled when using signature version v4. Body signing can only be disabled when using https. Defaults to true.

• s3UsEast1RegionalEndpoint ('legacy'|'regional') —

  when region is set to 'us-east-1', whether to send s3 request to global endpoints or 'us-east-1' regional endpoints. This config is only applicable to S3 client. Defaults to legacy

• s3UseArnRegion (Boolean) —

  whether to override the request region with the region inferred from requested resource's ARN. Only available for S3 buckets Defaults to true

• retryDelayOptions (map) —

  A set of options to configure the retry delay on retryable errors. Currently supported options are:

  • base [Integer] — The base number of milliseconds to use in the exponential backoff for operation retries. Defaults to 100 ms for all services except DynamoDB, where it defaults to 50ms.
  • customBackoff [function] — A custom function that accepts a retry count and error and returns the amount of time to delay in milliseconds. If the result is a non-zero negative value, no further retry attempts will be made. The base option will be ignored if this option is supplied.
• httpOptions (map) —

  A set of options to pass to the low-level HTTP request. Currently supported options are:

  • proxy [String] — the URL to proxy requests through
  • agent [http.Agent, https.Agent] — the Agent object to perform HTTP requests with. Used for connection pooling. Defaults to the global agent (http.globalAgent) for non-SSL connections. Note that for SSL connections, a special Agent object is used in order to enable peer certificate verification. This feature is only available in the Node.js environment.
  • connectTimeout [Integer] — Sets the socket to timeout after failing to establish a connection with the server after connectTimeout milliseconds. This timeout has no effect once a socket connection has been established.
  • timeout [Integer] — Sets the socket to timeout after timeout milliseconds of inactivity on the socket. Defaults to two minutes (120000).
  • xhrAsync [Boolean] — Whether the SDK will send asynchronous HTTP requests. Used in the browser environment only. Set to false to send requests synchronously. Defaults to true (async on).
  • xhrWithCredentials [Boolean] — Sets the "withCredentials" property of an XMLHttpRequest object. Used in the browser environment only. Defaults to false.
• apiVersion (String, Date) —

  a String in YYYY-MM-DD format (or a date) that represents the latest possible API version that can be used in all services (unless overridden by apiVersions). Specify 'latest' to use the latest possible version.

• apiVersions (map<String, String|Date>) —

  a map of service identifiers (the lowercase service class name) with the API version to use when instantiating a service. Specify 'latest' for each individual that can use the latest available version.

• logger (#write, #log) —

  an object that responds to .write() (like a stream) or .log() (like the console object) in order to log information about requests

• systemClockOffset (Number) —

  an offset value in milliseconds to apply to all signing times. Use this to compensate for clock skew when your system may be out of sync with the service time. Note that this configuration option can only be applied to the global AWS.config object and cannot be overridden in service-specific configuration. Defaults to 0 milliseconds.

• signatureVersion (String) —

  the signature version to sign requests with (overriding the API configuration). Possible values are: 'v2', 'v3', 'v4'.

• signatureCache (Boolean) —

  whether the signature to sign requests with (overriding the API configuration) is cached. Only applies to the signature version 'v4'. Defaults to true.

• dynamoDbCrc32 (Boolean) —

  whether to validate the CRC32 checksum of HTTP response bodies returned by DynamoDB. Default: true.

• useAccelerateEndpoint (Boolean) —

  Whether to use the S3 Transfer Acceleration endpoint with the S3 service. Default: false.

• clientSideMonitoring (Boolean) —

  whether to collect and publish this client's performance metrics of all its API requests.

• endpointDiscoveryEnabled (Boolean) —

  whether to enable endpoint discovery for operations that allow optionally using an endpoint returned by the service. Defaults to 'false'

• endpointCacheSize (Number) —

  the size of the global cache storing endpoints from endpoint discovery operations. Once endpoint cache is created, updating this setting cannot change existing cache size. Defaults to 1000

• hostPrefixEnabled (Boolean) —

  whether to marshal request parameters to the prefix of hostname. Defaults to true.

• stsRegionalEndpoints ('legacy'|'regional') —

  whether to send sts request to global endpoints or regional endpoints. Defaults to 'legacy'.

Property Details

endpoint ⇒ AWS.Endpoint (readwrite)

Returns an Endpoint object representing the endpoint URL for service requests.

Returns:

• (AWS.Endpoint) —

  an Endpoint object representing the endpoint URL for service requests.

Method Details

deleteScalingPolicy(params = {}, callback) ⇒ AWS.Request

Deletes the specified scaling policy for an Application Auto Scaling scalable target.

Deleting a step scaling policy deletes the underlying alarm action, but does not delete the CloudWatch alarm associated with the scaling policy, even if it no longer has an associated action.

For more information, see Delete a Step Scaling Policy and Delete a Target Tracking Scaling Policy in the Application Auto Scaling User Guide.

To create a scaling policy or update an existing one, see PutScalingPolicy.

Service Reference:

• DeleteScalingPolicy

Examples:

To delete a scaling policy

/* This example deletes a scaling policy for the Amazon ECS service called web-app, which is running in the default cluster. */

 var params = {
  PolicyName: "web-app-cpu-lt-25", 
  ResourceId: "service/default/web-app", 
  ScalableDimension: "ecs:service:DesiredCount", 
  ServiceNamespace: "ecs"
 };
 applicationautoscaling.deleteScalingPolicy(params, function(err, data) {
   if (err) console.log(err, err.stack); // an error occurred
   else     console.log(data);           // successful response
   /*
   data = {
   }
   */
 });

Calling the deleteScalingPolicy operation

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 | lambda:function:ProvisionedConcurrency, /* required */
  ServiceNamespace: ecs | elasticmapreduce | ec2 | appstream | dynamodb | rds | sagemaker | custom-resource | comprehend | lambda /* required */
};
applicationautoscaling.deleteScalingPolicy(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 AWS service that provides the resource or custom-resource for a resource provided by your own application or service. For more information, see AWS Service Namespaces in the Amazon Web Services General Reference.

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

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

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

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

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

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

    • DynamoDB table - The resource type is table and the unique identifier is the 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.

    • Amazon 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.

    • 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.

  • 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.

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

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

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

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

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

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

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

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

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

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

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

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

    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"
    • "lambda:function:ProvisionedConcurrency"

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.

deleteScheduledAction(params = {}, callback) ⇒ AWS.Request

Deletes the specified scheduled action for an Application Auto Scaling scalable target.

For more information, see Delete a Scheduled Action in the Application Auto Scaling User Guide.

Service Reference:

• DeleteScheduledAction

Examples:

Calling the deleteScheduledAction operation

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 | lambda:function:ProvisionedConcurrency, /* required */
  ScheduledActionName: 'STRING_VALUE', /* required */
  ServiceNamespace: ecs | elasticmapreduce | ec2 | appstream | dynamodb | rds | sagemaker | custom-resource | comprehend | lambda /* 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 AWS service that provides the resource or custom-resource for a resource provided by your own application or service. For more information, see AWS Service Namespaces in the Amazon Web Services General Reference.

    Possible values include:
    • "ecs"
    • "elasticmapreduce"
    • "ec2"
    • "appstream"
    • "dynamodb"
    • "rds"
    • "sagemaker"
    • "custom-resource"
    • "comprehend"
    • "lambda"
  • 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 request - The resource type is spot-fleet-request and the unique identifier is the Spot Fleet request ID. Example: spot-fleet-request/sfr-73fbd2ce-aa30-494c-8788-1cee4EXAMPLE.

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

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

    • DynamoDB table - The resource type is table and the unique identifier is the 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.

    • Amazon 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.

    • 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.

  • 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.

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

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

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

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

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

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

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

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

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

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

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

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

    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"
    • "lambda:function:ProvisionedConcurrency"

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.

deregisterScalableTarget(params = {}, callback) ⇒ AWS.Request

Deregisters an Application Auto Scaling scalable target.

Deregistering a scalable target deletes the scaling policies that are associated with it.

To create a scalable target or update an existing one, see RegisterScalableTarget.

Service Reference:

• DeregisterScalableTarget

Examples:

To deregister a scalable target

/* 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 = {
   }
   */
 });

Calling the deregisterScalableTarget operation

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 | lambda:function:ProvisionedConcurrency, /* required */
  ServiceNamespace: ecs | elasticmapreduce | ec2 | appstream | dynamodb | rds | sagemaker | custom-resource | comprehend | lambda /* 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 AWS service that provides the resource or custom-resource for a resource provided by your own application or service. For more information, see AWS Service Namespaces in the Amazon Web Services General Reference.

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

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

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

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

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

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

    • DynamoDB table - The resource type is table and the unique identifier is the 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.

    • Amazon 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.

    • 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.

  • ScalableDimension — (String)

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

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

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

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

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

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

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

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

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

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

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

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

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

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

    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"
    • "lambda:function:ProvisionedConcurrency"

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.

describeScalableTargets(params = {}, callback) ⇒ AWS.Request

Gets information about the scalable targets in the specified namespace.

You can filter the results using ResourceIds and ScalableDimension.

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

Service Reference:

• DescribeScalableTargets

Examples:

To describe scalable targets

/* 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
      }
     }
    ]
   }
   */
 });

Calling the describeScalableTargets operation

var params = {
  ServiceNamespace: ecs | elasticmapreduce | ec2 | appstream | dynamodb | rds | sagemaker | custom-resource | comprehend | lambda, /* 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 | lambda:function:ProvisionedConcurrency
};
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 AWS service that provides the resource or custom-resource for a resource provided by your own application or service. For more information, see AWS Service Namespaces in the Amazon Web Services General Reference.

    Possible values include:
    • "ecs"
    • "elasticmapreduce"
    • "ec2"
    • "appstream"
    • "dynamodb"
    • "rds"
    • "sagemaker"
    • "custom-resource"
    • "comprehend"
    • "lambda"
  • ResourceIds — (Array<String>)

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

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

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

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

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

    • DynamoDB table - The resource type is table and the unique identifier is the 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.

    • Amazon 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.

    • 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.

  • 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.

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

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

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

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

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

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

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

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

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

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

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

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

    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"
    • "lambda:function:ProvisionedConcurrency"
  • 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 AWS service that provides the resource or custom-resource for a resource provided by your own application or service. For more information, see AWS Service Namespaces in the Amazon Web Services General Reference.

        Possible values include:
        • "ecs"
        • "elasticmapreduce"
        • "ec2"
        • "appstream"
        • "dynamodb"
        • "rds"
        • "sagemaker"
        • "custom-resource"
        • "comprehend"
        • "lambda"
      • 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 request - The resource type is spot-fleet-request and the unique identifier is the Spot Fleet request ID. Example: spot-fleet-request/sfr-73fbd2ce-aa30-494c-8788-1cee4EXAMPLE.

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

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

        • DynamoDB table - The resource type is table and the unique identifier is the 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.

        • Amazon 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.

        • 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.

      • 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.

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

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

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

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

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

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

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

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

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

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

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

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

        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"
        • "lambda:function:ProvisionedConcurrency"
      • MinCapacity — required — (Integer)

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

      • MaxCapacity — required — (Integer)

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

      • 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.

describeScalingActivities(params = {}, callback) ⇒ AWS.Request

Provides descriptive information about the scaling activities in the specified namespace from the previous six weeks.

You can filter the results using ResourceId and ScalableDimension.

Scaling activities are triggered by CloudWatch alarms that are associated with scaling policies. To view the scaling policies for a service namespace, see DescribeScalingPolicies. To create a scaling policy or update an existing one, see PutScalingPolicy.

Service Reference:

• DescribeScalingActivities

Examples:

To describe scaling activities for a scalable target

/* 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."
     }
    ]
   }
   */
 });

Calling the describeScalingActivities operation

var params = {
  ServiceNamespace: ecs | elasticmapreduce | ec2 | appstream | dynamodb | rds | sagemaker | custom-resource | comprehend | lambda, /* 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 | lambda:function:ProvisionedConcurrency
};
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 AWS service that provides the resource or custom-resource for a resource provided by your own application or service. For more information, see AWS Service Namespaces in the Amazon Web Services General Reference.

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

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

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

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

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

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

    • DynamoDB table - The resource type is table and the unique identifier is the 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.

    • Amazon 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.

    • 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.

  • 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.

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

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

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

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

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

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

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

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

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

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

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

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

    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"
    • "lambda:function:ProvisionedConcurrency"
  • 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 AWS service that provides the resource or custom-resource for a resource provided by your own application or service. For more information, see AWS Service Namespaces in the Amazon Web Services General Reference.

        Possible values include:
        • "ecs"
        • "elasticmapreduce"
        • "ec2"
        • "appstream"
        • "dynamodb"
        • "rds"
        • "sagemaker"
        • "custom-resource"
        • "comprehend"
        • "lambda"
      • 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 request - The resource type is spot-fleet-request and the unique identifier is the Spot Fleet request ID. Example: spot-fleet-request/sfr-73fbd2ce-aa30-494c-8788-1cee4EXAMPLE.

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

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

        • DynamoDB table - The resource type is table and the unique identifier is the 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.

        • Amazon 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.

        • 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.

      • 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.

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

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

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

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

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

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

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

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

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

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

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

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

        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"
        • "lambda:function:ProvisionedConcurrency"
      • 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.

describeScalingPolicies(params = {}, callback) ⇒ AWS.Request

Describes the Application Auto Scaling scaling policies for the specified service namespace.

You can filter the results using ResourceId, ScalableDimension, and PolicyNames.

To create a scaling policy or update an existing one, see PutScalingPolicy. If you are no longer using a scaling policy, you can delete it using DeleteScalingPolicy.

Service Reference:

• DescribeScalingPolicies

Examples:

To describe scaling policies

/* 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
        }
       ]
      }
     }
    ]
   }
   */
 });

Calling the describeScalingPolicies operation

var params = {
  ServiceNamespace: ecs | elasticmapreduce | ec2 | appstream | dynamodb | rds | sagemaker | custom-resource | comprehend | lambda, /* 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 | lambda:function:ProvisionedConcurrency
};
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 AWS service that provides the resource or custom-resource for a resource provided by your own application or service. For more information, see AWS Service Namespaces in the Amazon Web Services General Reference.

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

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

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

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

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

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

    • DynamoDB table - The resource type is table and the unique identifier is the 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.

    • Amazon 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.

    • 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.

  • 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.

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

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

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

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

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

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

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

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

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

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

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

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

    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"
    • "lambda:function:ProvisionedConcurrency"
  • 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:

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

        Possible values include:
        • "ecs"
        • "elasticmapreduce"
        • "ec2"
        • "appstream"
        • "dynamodb"
        • "rds"
        • "sagemaker"
        • "custom-resource"
        • "comprehend"
        • "lambda"
      • 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 request - The resource type is spot-fleet-request and the unique identifier is the Spot Fleet request ID. Example: spot-fleet-request/sfr-73fbd2ce-aa30-494c-8788-1cee4EXAMPLE.

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

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

        • DynamoDB table - The resource type is table and the unique identifier is the 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.

        • Amazon 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.

        • 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.

      • 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.

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

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

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

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

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

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

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

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

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

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

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

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

        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"
        • "lambda:function:ProvisionedConcurrency"
      • PolicyType — required — (String)

        The scaling policy type.

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

        A step scaling policy.

        • AdjustmentType — (String)

          Specifies whether the ScalingAdjustment value in a StepAdjustment is an absolute number or a percentage of the current capacity.

          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.

          • 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 scalable dimension while a negative number removes from the current scalable dimension.

        • MinAdjustmentMagnitude — (Integer)

          The minimum number to adjust your scalable dimension as a result of a scaling activity. If the adjustment type is PercentChangeInCapacity, the scaling policy changes the scalable dimension of the scalable target by this amount.

          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, after a scaling activity completes where previous trigger-related scaling activities can influence future scaling events.

          For scale-out policies, while the cooldown period is in effect, the capacity that has been added by the previous scale-out event that initiated the cooldown is calculated as part of the desired capacity for the next scale out. The intention is to continuously (but not excessively) scale out. For example, an alarm triggers a step scaling policy to scale out an Amazon ECS service by 2 tasks, the scaling activity completes successfully, and a cooldown period of 5 minutes starts. During the cooldown period, if the alarm triggers the same policy again but at a more aggressive step adjustment to scale out the service by 3 tasks, the 2 tasks that were added in the previous scale-out event are considered part of that capacity and only 1 additional task is added to the desired count.

          For scale-in policies, the cooldown period is used to block subsequent scale-in requests until it has expired. The intention is to scale in conservatively to protect your application's availability. However, if another alarm triggers a scale-out policy during the cooldown period after a scale-in, Application Auto Scaling scales out your scalable target immediately.

        • 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. The range is 8.515920e-109 to 1.174271e+108 (Base 10) or 2e-360 to 2e360 (Base 2).

        • 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"
          • 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.

            The format is app/<load-balancer-name>/<load-balancer-id>/targetgroup/<target-group-name>/<target-group-id>, 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.

        • 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, after a scale-out activity completes before another scale-out activity can start.

          While the cooldown period is in effect, the capacity that has been added by the previous scale-out event that initiated the cooldown is calculated as part of the desired capacity for the next scale out. The intention is to continuously (but not excessively) scale out.

        • ScaleInCooldown — (Integer)

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

          The cooldown period is used to block subsequent scale-in requests until it has expired. The intention is to scale in conservatively to protect your application's availability. However, if another alarm triggers a scale-out policy during the cooldown period after a scale-in, Application Auto Scaling scales out your scalable target immediately.

        • 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 resource. Otherwise, scale in is enabled and the target tracking scaling policy can remove capacity from the scalable resource. 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.

describeScheduledActions(params = {}, callback) ⇒ AWS.Request

Describes the Application Auto Scaling scheduled actions for the specified service namespace.

You can filter the results using the ResourceId, ScalableDimension, and ScheduledActionNames parameters.

To create a scheduled action or update an existing one, see PutScheduledAction. If you are no longer using a scheduled action, you can delete it using DeleteScheduledAction.

Service Reference:

• DescribeScheduledActions

Examples:

Calling the describeScheduledActions operation

var params = {
  ServiceNamespace: ecs | elasticmapreduce | ec2 | appstream | dynamodb | rds | sagemaker | custom-resource | comprehend | lambda, /* 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 | lambda:function:ProvisionedConcurrency,
  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 AWS service that provides the resource or custom-resource for a resource provided by your own application or service. For more information, see AWS Service Namespaces in the Amazon Web Services General Reference.

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

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

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

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

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

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

    • DynamoDB table - The resource type is table and the unique identifier is the 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.

    • Amazon 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.

    • 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.

  • 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.

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

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

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

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

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

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

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

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

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

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

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

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

    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"
    • "lambda:function:ProvisionedConcurrency"
  • 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 AWS service that provides the resource or custom-resource for a resource provided by your own application or service. For more information, see AWS Service Namespaces in the Amazon Web Services General Reference.

        Possible values include:
        • "ecs"
        • "elasticmapreduce"
        • "ec2"
        • "appstream"
        • "dynamodb"
        • "rds"
        • "sagemaker"
        • "custom-resource"
        • "comprehend"
        • "lambda"
      • 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. Specify the time, in UTC.

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

        For more information about cron expressions, see Cron Expressions in the Amazon CloudWatch Events User Guide.

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

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

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

        • DynamoDB table - The resource type is table and the unique identifier is the 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.

        • Amazon 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.

        • 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.

      • 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.

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

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

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

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

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

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

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

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

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

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

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

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

        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"
        • "lambda:function:ProvisionedConcurrency"
      • StartTime — (Date)

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

      • EndTime — (Date)

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

      • ScalableTargetAction — (map)

        The new minimum and maximum capacity. You can set both values or just one. During 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.

        • MaxCapacity — (Integer)

          The maximum capacity.

      • 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.

putScalingPolicy(params = {}, callback) ⇒ AWS.Request

Creates or updates a policy for an Application Auto Scaling scalable target.

Each scalable target is identified by a service namespace, resource ID, and scalable dimension. A scaling policy applies to the scalable target identified by those three attributes. You cannot create a scaling policy until you have registered the resource as a scalable target using RegisterScalableTarget.

To update a policy, specify its policy name and the parameters that you want to change. Any parameters that you don't specify are not changed by this update request.

You can view the scaling policies for a service namespace using DescribeScalingPolicies. If you are no longer using a scaling policy, you can delete it using DeleteScalingPolicy.

Multiple scaling policies can be in force at the same time for the same scalable target. You can have one or more target tracking scaling policies, one or more step scaling policies, or both. However, there is a chance that multiple policies could conflict, instructing the scalable target to scale out or in at the same time. Application Auto Scaling gives precedence to the policy that provides the largest capacity for both scale out and scale in. For example, if one policy increases capacity by 3, another policy increases capacity by 200 percent, and the current capacity is 10, Application Auto Scaling uses the policy with the highest calculated capacity (200% of 10 = 20) and scales out to 30.

Learn more about how to work with scaling policies in the Application Auto Scaling User Guide.

Service Reference:

• PutScalingPolicy

Examples:

To apply a target tracking scaling policy with a predefined metric specification

/* 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"
   }
   */
 });

To apply a target tracking scaling policy with a customized metric specification

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

 var params = {
  PolicyName: "cms75-target-tracking-scaling-policy", 
  PolicyType: "TargetTrackingScaling", 
  ResourceId: "service/default/web-app", 
  ScalableDimension: "ecs:service:DesiredCount", 
  ServiceNamespace: "ecs", 
  TargetTrackingScalingPolicyConfiguration: {
   CustomizedMetricSpecification: {
    Dimensions: [
       {
      Name: "MyOptionalMetricDimensionName", 
      Value: "MyOptionalMetricDimensionValue"
     }
    ], 
    MetricName: "MyUtilizationMetric", 
    Namespace: "MyNamespace", 
    Statistic: "Average", 
    Unit: "Percent"
   }, 
   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-9bc77b56-0571-4276-ba0f-d4178882e0a0", 
      AlarmName: "TargetTracking-service/default/web-app-AlarmHigh-9bc77b56-0571-4276-ba0f-d4178882e0a0"
     }, 
       {
      AlarmARN: "arn:aws:cloudwatch:us-west-2:012345678910:alarm:TargetTracking-service/default/web-app-AlarmLow-9b6ad934-6d37-438e-9e05-02836ddcbdc4", 
      AlarmName: "TargetTracking-service/default/web-app-AlarmLow-9b6ad934-6d37-438e-9e05-02836ddcbdc4"
     }
    ], 
    PolicyARN: "arn:aws:autoscaling:us-west-2:012345678910:scalingPolicy: 8784a896-b2ba-47a1-b08c-27301cc499a1:resource/ecs/service/default/web-app:policyName/cms75-target-tracking-scaling-policy"
   }
   */
 });

To apply a target tracking scaling policy for scale out only

/* The following example applies a target tracking scaling policy to an Amazon ECS service called web-app in the default cluster. The policy is used to scale out the ECS service when the RequestCountPerTarget metric from the Application Load Balancer exceeds the threshold. */

 var params = {
  PolicyName: "alb-scale-out-target-tracking-scaling-policy", 
  PolicyType: "TargetTrackingScaling", 
  ResourceId: "service/default/web-app", 
  ScalableDimension: "ecs:service:DesiredCount", 
  ServiceNamespace: "ecs", 
  TargetTrackingScalingPolicyConfiguration: {
   DisableScaleIn: true, 
   PredefinedMetricSpecification: {
    PredefinedMetricType: "ALBRequestCountPerTarget", 
    ResourceLabel: "app/EC2Co-EcsEl-1TKLTMITMM0EO/f37c06a68c1748aa/targetgroup/EC2Co-Defau-LDNM7Q3ZH1ZN/6d4ea56ca2d6a18d"
   }, 
   ScaleInCooldown: 60, 
   ScaleOutCooldown: 60, 
   TargetValue: 1000
  }
 };
 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: "TargetTracking-service/default/web-app-AlarmHigh-d4f0770c-b46e-434a-a60f-3b36d653feca", 
      AlarmName: "arn:aws:cloudwatch:us-west-2:012345678910:alarm:TargetTracking-service/default/web-app-AlarmHigh-d4f0770c-b46e-434a-a60f-3b36d653feca"
     }
    ], 
    PolicyARN: "arn:aws:autoscaling:us-west-2:012345678910:scalingPolicy:6d8972f3-efc8-437c-92d1-6270f29a66e7:resource/ecs/service/default/web-app:policyName/alb-scale-out-target-tracking-scaling-policy"
   }
   */
 });

To apply a step scaling policy to an Amazon ECS service

/* This example applies a step scaling policy to an Amazon ECS service called web-app in the default cluster. The policy increases the desired count of the service by 200%, with a cool down period of 60 seconds. */

 var params = {
  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
    }
   ]
  }
 };
 applicationautoscaling.putScalingPolicy(params, function(err, data) {
   if (err) console.log(err, err.stack); // an error occurred
   else     console.log(data);           // successful response
   /*
   data = {
    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"
   }
   */
 });

To apply a step scaling policy to an Amazon EC2 Spot fleet

/* This example applies a step scaling policy to an Amazon EC2 Spot fleet. The policy increases the target capacity of the spot fleet by 200%, with a cool down period of 180 seconds.",
   */

 var params = {
  PolicyName: "fleet-cpu-gt-75", 
  PolicyType: "StepScaling", 
  ResourceId: "spot-fleet-request/sfr-45e69d8a-be48-4539-bbf3-3464e99c50c3", 
  ScalableDimension: "ec2:spot-fleet-request:TargetCapacity", 
  ServiceNamespace: "ec2", 
  StepScalingPolicyConfiguration: {
   AdjustmentType: "PercentChangeInCapacity", 
   Cooldown: 180, 
   StepAdjustments: [
      {
     MetricIntervalLowerBound: 0, 
     ScalingAdjustment: 200
    }
   ]
  }
 };
 applicationautoscaling.putScalingPolicy(params, function(err, data) {
   if (err) console.log(err, err.stack); // an error occurred
   else     console.log(data);           // successful response
   /*
   data = {
    PolicyARN: "arn:aws:autoscaling:us-east-1:012345678910:scalingPolicy:89406401-0cb7-4130-b770-d97cca0e446b:resource/ec2/spot-fleet-request/sfr-45e69d8a-be48-4539-bbf3-3464e99c50c3:policyName/fleet-cpu-gt-75"
   }
   */
 });

Calling the putScalingPolicy operation

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 | lambda:function:ProvisionedConcurrency, /* required */
  ServiceNamespace: ecs | elasticmapreduce | ec2 | appstream | dynamodb | rds | sagemaker | custom-resource | comprehend | lambda, /* 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, /* 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 AWS service that provides the resource or custom-resource for a resource provided by your own application or service. For more information, see AWS Service Namespaces in the Amazon Web Services General Reference.

    Possible values include:
    • "ecs"
    • "elasticmapreduce"
    • "ec2"
    • "appstream"
    • "dynamodb"
    • "rds"
    • "sagemaker"
    • "custom-resource"
    • "comprehend"
    • "lambda"
  • 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 request - The resource type is spot-fleet-request and the unique identifier is the Spot Fleet request ID. Example: spot-fleet-request/sfr-73fbd2ce-aa30-494c-8788-1cee4EXAMPLE.

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

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

    • DynamoDB table - The resource type is table and the unique identifier is the 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.

    • Amazon 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.

    • 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.

  • 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.

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

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

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

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

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

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

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

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

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

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

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

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

    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"
    • "lambda:function:ProvisionedConcurrency"
  • 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, or AWS Lambda

    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 whether the ScalingAdjustment value in a StepAdjustment is an absolute number or a percentage of the current capacity.

      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.

      • 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 scalable dimension while a negative number removes from the current scalable dimension.

    • MinAdjustmentMagnitude — (Integer)

      The minimum number to adjust your scalable dimension as a result of a scaling activity. If the adjustment type is PercentChangeInCapacity, the scaling policy changes the scalable dimension of the scalable target by this amount.

      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, after a scaling activity completes where previous trigger-related scaling activities can influence future scaling events.

      For scale-out policies, while the cooldown period is in effect, the capacity that has been added by the previous scale-out event that initiated the cooldown is calculated as part of the desired capacity for the next scale out. The intention is to continuously (but not excessively) scale out. For example, an alarm triggers a step scaling policy to scale out an Amazon ECS service by 2 tasks, the scaling activity completes successfully, and a cooldown period of 5 minutes starts. During the cooldown period, if the alarm triggers the same policy again but at a more aggressive step adjustment to scale out the service by 3 tasks, the 2 tasks that were added in the previous scale-out event are considered part of that capacity and only 1 additional task is added to the desired count.

      For scale-in policies, the cooldown period is used to block subsequent scale-in requests until it has expired. The intention is to scale in conservatively to protect your application's availability. However, if another alarm triggers a scale-out policy during the cooldown period after a scale-in, Application Auto Scaling scales out your scalable target immediately.

    • 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. The range is 8.515920e-109 to 1.174271e+108 (Base 10) or 2e-360 to 2e360 (Base 2).

    • 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"
      • 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.

        The format is app/<load-balancer-name>/<load-balancer-id>/targetgroup/<target-group-name>/<target-group-id>, 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.

    • 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, after a scale-out activity completes before another scale-out activity can start.

      While the cooldown period is in effect, the capacity that has been added by the previous scale-out event that initiated the cooldown is calculated as part of the desired capacity for the next scale out. The intention is to continuously (but not excessively) scale out.

    • ScaleInCooldown — (Integer)

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

      The cooldown period is used to block subsequent scale-in requests until it has expired. The intention is to scale in conservatively to protect your application's availability. However, if another alarm triggers a scale-out policy during the cooldown period after a scale-in, Application Auto Scaling scales out your scalable target immediately.

    • 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 resource. Otherwise, scale in is enabled and the target tracking scaling policy can remove capacity from the scalable resource. 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.

putScheduledAction(params = {}, callback) ⇒ AWS.Request

Creates or updates a scheduled action for an Application Auto Scaling scalable target.

Each scalable target is identified by a service namespace, resource ID, and scalable dimension. A scheduled action applies to the scalable target identified by those three attributes. You cannot create a scheduled action until you have registered the resource as a scalable target using RegisterScalableTarget.

To update an action, specify its name and the parameters that you want to change. If you don't specify start and end times, the old values are deleted. Any other parameters that you don't specify are not changed by this update request.

You can view the scheduled actions using DescribeScheduledActions. If you are no longer using a scheduled action, you can delete it using DeleteScheduledAction.

Learn more about how to work with scheduled actions in the Application Auto Scaling User Guide.

Service Reference:

• PutScheduledAction

Examples:

Calling the putScheduledAction operation

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 | lambda:function:ProvisionedConcurrency, /* required */
  ScheduledActionName: 'STRING_VALUE', /* required */
  ServiceNamespace: ecs | elasticmapreduce | ec2 | appstream | dynamodb | rds | sagemaker | custom-resource | comprehend | lambda, /* 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
};
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 AWS service that provides the resource or custom-resource for a resource provided by your own application or service. For more information, see AWS Service Namespaces in the Amazon Web Services General Reference.

    Possible values include:
    • "ecs"
    • "elasticmapreduce"
    • "ec2"
    • "appstream"
    • "dynamodb"
    • "rds"
    • "sagemaker"
    • "custom-resource"
    • "comprehend"
    • "lambda"
  • 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. Specify the time, in UTC.

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

    For more information about cron expressions, see Cron Expressions in the Amazon CloudWatch Events User Guide.

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

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

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

    • DynamoDB table - The resource type is table and the unique identifier is the 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.

    • Amazon 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.

    • 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.

  • 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.

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

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

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

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

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

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

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

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

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

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

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

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

    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"
    • "lambda:function:ProvisionedConcurrency"
  • StartTime — (Date)

    The date and time for the scheduled action to start.

  • EndTime — (Date)

    The date and time for the scheduled action to end.

  • ScalableTargetAction — (map)

    The new minimum and maximum capacity. You can set both values or just one. During 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.

    • MaxCapacity — (Integer)

      The maximum capacity.

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.

registerScalableTarget(params = {}, callback) ⇒ AWS.Request

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

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

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

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

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

Service Reference:

• RegisterScalableTarget

Examples:

To register an ECS service as a scalable target

/* 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 = {
   }
   */
 });

To register an EC2 Spot fleet as a scalable target

/* This example registers a scalable target from an Amazon EC2 Spot fleet with a minimum target capacity of 1 and a maximum of 10. */

 var params = {
  MaxCapacity: 10, 
  MinCapacity: 1, 
  ResourceId: "spot-fleet-request/sfr-45e69d8a-be48-4539-bbf3-3464e99c50c3", 
  ScalableDimension: "ec2:spot-fleet-request:TargetCapacity", 
  ServiceNamespace: "ec2"
 };
 applicationautoscaling.registerScalableTarget(params, function(err, data) {
   if (err) console.log(err, err.stack); // an error occurred
   else     console.log(data);           // successful response
   /*
   data = {
   }
   */
 });

Calling the registerScalableTarget operation

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 | lambda:function:ProvisionedConcurrency, /* required */
  ServiceNamespace: ecs | elasticmapreduce | ec2 | appstream | dynamodb | rds | sagemaker | custom-resource | comprehend | lambda, /* 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 AWS service that provides the resource or custom-resource for a resource provided by your own application or service. For more information, see AWS Service Namespaces in the Amazon Web Services General Reference.

    Possible values include:
    • "ecs"
    • "elasticmapreduce"
    • "ec2"
    • "appstream"
    • "dynamodb"
    • "rds"
    • "sagemaker"
    • "custom-resource"
    • "comprehend"
    • "lambda"
  • 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 request - The resource type is spot-fleet-request and the unique identifier is the Spot Fleet request ID. Example: spot-fleet-request/sfr-73fbd2ce-aa30-494c-8788-1cee4EXAMPLE.

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

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

    • DynamoDB table - The resource type is table and the unique identifier is the 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.

    • Amazon 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.

    • 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.

  • ScalableDimension — (String)

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

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

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

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

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

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

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

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

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

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

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

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

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

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

    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"
    • "lambda:function:ProvisionedConcurrency"
  • MinCapacity — (Integer)

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

  • MaxCapacity — (Integer)

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

  • RoleARN — (String)

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

    For Amazon EMR, this parameter is required, and it must specify the ARN of an IAM role that allows Application Auto Scaling to modify the scalable target on your behalf.

  • 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.