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[ aws . application-autoscaling ]

put-scaling-policy

Description

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 without first registering a scalable target using register-scalable-target .

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 describe-scaling-policies . If you are no longer using a scaling policy, you can delete it using delete-scaling-policy .

See also: AWS API Documentation

Synopsis

  put-scaling-policy
--policy-name <value>
--service-namespace <value>
--resource-id <value>
--scalable-dimension <value>
[--policy-type <value>]
[--step-scaling-policy-configuration <value>]
[--target-tracking-scaling-policy-configuration <value>]
[--cli-input-json <value>]
[--generate-cli-skeleton <value>]

Options

--policy-name (string)

The name of the scaling policy.

--service-namespace (string)

The namespace of the AWS service. For more information, see AWS Service Namespaces in the Amazon Web Services General Reference .

Possible values:

  • ecs
  • elasticmapreduce
  • ec2
  • appstream
  • dynamodb
  • rds

--resource-id (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 resource ID. Example: table/my-table .
  • DynamoDB global secondary index - The resource type is index and the unique identifier is the resource ID. Example: table/my-table/index/my-table-index .
  • Aurora DB cluster - The resource type is cluster and the unique identifier is the cluster name. Example: cluster:my-db-cluster .

--scalable-dimension (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.

Possible values:

  • 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

--policy-type (string)

The policy type. If you are creating a new policy, this parameter is required. If you are updating a policy, this parameter is not required.

For DynamoDB, only TargetTrackingScaling is supported. For any other service, only StepScaling is supported.

Possible values:

  • StepScaling
  • TargetTrackingScaling

--step-scaling-policy-configuration (structure)

A step scaling policy.

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

Shorthand Syntax:

AdjustmentType=string,StepAdjustments=[{MetricIntervalLowerBound=double,MetricIntervalUpperBound=double,ScalingAdjustment=integer},{MetricIntervalLowerBound=double,MetricIntervalUpperBound=double,ScalingAdjustment=integer}],MinAdjustmentMagnitude=integer,Cooldown=integer,MetricAggregationType=string

JSON Syntax:

{
  "AdjustmentType": "ChangeInCapacity"|"PercentChangeInCapacity"|"ExactCapacity",
  "StepAdjustments": [
    {
      "MetricIntervalLowerBound": double,
      "MetricIntervalUpperBound": double,
      "ScalingAdjustment": integer
    }
    ...
  ],
  "MinAdjustmentMagnitude": integer,
  "Cooldown": integer,
  "MetricAggregationType": "Average"|"Minimum"|"Maximum"
}

--target-tracking-scaling-policy-configuration (structure)

A target tracking policy.

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

JSON Syntax:

{
  "TargetValue": double,
  "PredefinedMetricSpecification": {
    "PredefinedMetricType": "DynamoDBReadCapacityUtilization"|"DynamoDBWriteCapacityUtilization"|"ALBRequestCountPerTarget"|"RDSReaderAverageCPUUtilization"|"RDSReaderAverageDatabaseConnections"|"EC2SpotFleetRequestAverageCPUUtilization"|"EC2SpotFleetRequestAverageNetworkIn"|"EC2SpotFleetRequestAverageNetworkOut",
    "ResourceLabel": "string"
  },
  "CustomizedMetricSpecification": {
    "MetricName": "string",
    "Namespace": "string",
    "Dimensions": [
      {
        "Name": "string",
        "Value": "string"
      }
      ...
    ],
    "Statistic": "Average"|"Minimum"|"Maximum"|"SampleCount"|"Sum",
    "Unit": "string"
  },
  "ScaleOutCooldown": integer,
  "ScaleInCooldown": integer,
  "DisableScaleIn": true|false
}

--cli-input-json (string) Performs service operation based on the JSON string provided. The JSON string follows the format provided by --generate-cli-skeleton. If other arguments are provided on the command line, the CLI values will override the JSON-provided values.

--generate-cli-skeleton (string) Prints a JSON skeleton to standard output without sending an API request. If provided with no value or the value input, prints a sample input JSON that can be used as an argument for --cli-input-json. If provided with the value output, it validates the command inputs and returns a sample output JSON for that command.

Examples

To apply a scaling policy to an Amazon ECS service

This example command applies a 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.

Command:

aws application-autoscaling put-scaling-policy --cli-input-json file://scale-out.json

Contents of scale-out.json file:

{
    "PolicyName": "web-app-cpu-gt-75",
    "ServiceNamespace": "ecs",
    "ResourceId": "service/default/web-app",
    "ScalableDimension": "ecs:service:DesiredCount",
    "PolicyType": "StepScaling",
    "StepScalingPolicyConfiguration": {
        "AdjustmentType": "PercentChangeInCapacity",
        "StepAdjustments": [
            {
                              "MetricIntervalLowerBound": 0,
                              "ScalingAdjustment": 200
            }
        ],
        "Cooldown": 60
    }
}

Output:

{
    "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"
}

Output

PolicyARN -> (string)

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

Alarms -> (list)

The CloudWatch alarms created for the target tracking policy.

(structure)

Represents a CloudWatch alarm associated with a scaling policy.

AlarmName -> (string)

The name of the alarm.

AlarmARN -> (string)

The Amazon Resource Name (ARN) of the alarm.