interface AutoScalingPolicyProperty

Language	Type name
.NET	Amazon.CDK.AWS.EMR.CfnCluster.AutoScalingPolicyProperty
Java	software.amazon.awscdk.services.emr.CfnCluster.AutoScalingPolicyProperty
Python	aws_cdk.aws_emr.CfnCluster.AutoScalingPolicyProperty
TypeScript	@aws-cdk/aws-emr » CfnCluster » AutoScalingPolicyProperty

AutoScalingPolicy is a subproperty of InstanceGroupConfig .

AutoScalingPolicy defines how an instance group dynamically adds and terminates EC2 instances in response to the value of a CloudWatch metric. For more information, see Using Automatic Scaling in Amazon EMR in the Amazon EMR Management Guide .

Example

// The code below shows an example of how to instantiate this type.
// The values are placeholders you should change.
import * as emr from '@aws-cdk/aws-emr';
const autoScalingPolicyProperty: emr.CfnCluster.AutoScalingPolicyProperty = {
  constraints: {
    maxCapacity: 123,
    minCapacity: 123,
  },
  rules: [{
    action: {
      simpleScalingPolicyConfiguration: {
        scalingAdjustment: 123,

        // the properties below are optional
        adjustmentType: 'adjustmentType',
        coolDown: 123,
      },

      // the properties below are optional
      market: 'market',
    },
    name: 'name',
    trigger: {
      cloudWatchAlarmDefinition: {
        comparisonOperator: 'comparisonOperator',
        metricName: 'metricName',
        period: 123,
        threshold: 123,

        // the properties below are optional
        dimensions: [{
          key: 'key',
          value: 'value',
        }],
        evaluationPeriods: 123,
        namespace: 'namespace',
        statistic: 'statistic',
        unit: 'unit',
      },
    },

    // the properties below are optional
    description: 'description',
  }],
};

Properties

Name	Type	Description
constraints	IResolvable | ScalingConstraintsProperty	The upper and lower Amazon EC2 instance limits for an automatic scaling policy.
rules	IResolvable | IResolvable | ScalingRuleProperty[]	The scale-in and scale-out rules that comprise the automatic scaling policy.

---

constraints

Type: IResolvable | ScalingConstraintsProperty

The upper and lower Amazon EC2 instance limits for an automatic scaling policy.

Automatic scaling activity will not cause an instance group to grow above or below these limits.

---

rules

Type: IResolvable | IResolvable | ScalingRuleProperty[]

The scale-in and scale-out rules that comprise the automatic scaling policy.