enum TerminationPolicy

Language	Type name
.NET	Amazon.CDK.AWS.AutoScaling.TerminationPolicy
Go	github.com/aws/aws-cdk-go/awscdk/v2/awsautoscaling#TerminationPolicy
Java	software.amazon.awscdk.services.autoscaling.TerminationPolicy
Python	aws_cdk.aws_autoscaling.TerminationPolicy
TypeScript (source)	aws-cdk-lib » aws_autoscaling » TerminationPolicy

Specifies the termination criteria to apply before Amazon EC2 Auto Scaling chooses an instance for termination.

Example

declare const vpc: ec2.Vpc;
declare const instanceType: ec2.InstanceType;
declare const machineImage: ec2.IMachineImage;
declare const arn: string;

new autoscaling.AutoScalingGroup(this, 'ASG', {
  vpc,
  instanceType,
  machineImage,

  // ...

  terminationPolicies: [
    autoscaling.TerminationPolicy.CUSTOM_LAMBDA_FUNCTION,
    autoscaling.TerminationPolicy.OLDEST_INSTANCE,
    autoscaling.TerminationPolicy.DEFAULT,
  ],

  //terminationPolicyCustomLambdaFunctionArn property must be specified if the TerminationPolicy.CUSTOM_LAMBDA_FUNCTION is used
  terminationPolicyCustomLambdaFunctionArn: arn,
});

Members

Name	Description
ALLOCATION_STRATEGY	Terminate instances in the Auto Scaling group to align the remaining instances to the allocation strategy for the type of instance that is terminating (either a Spot Instance or an On-Demand Instance).
CLOSEST_TO_NEXT_INSTANCE_HOUR	Terminate instances that are closest to the next billing hour.
DEFAULT	Terminate instances according to the default termination policy.
NEWEST_INSTANCE	Terminate the newest instance in the group.
OLDEST_INSTANCE	Terminate the oldest instance in the group.
OLDEST_LAUNCH_CONFIGURATION	Terminate instances that have the oldest launch configuration.
OLDEST_LAUNCH_TEMPLATE	Terminate instances that have the oldest launch template.
CUSTOM_LAMBDA_FUNCTION	Terminate instances using custom termination policy with lambda.

---

ALLOCATION_STRATEGY

Terminate instances in the Auto Scaling group to align the remaining instances to the allocation strategy for the type of instance that is terminating (either a Spot Instance or an On-Demand Instance).

---

CLOSEST_TO_NEXT_INSTANCE_HOUR

Terminate instances that are closest to the next billing hour.

---

DEFAULT

Terminate instances according to the default termination policy.

---

NEWEST_INSTANCE

Terminate the newest instance in the group.

---

OLDEST_INSTANCE

Terminate the oldest instance in the group.

---

OLDEST_LAUNCH_CONFIGURATION

Terminate instances that have the oldest launch configuration.

---

OLDEST_LAUNCH_TEMPLATE

Terminate instances that have the oldest launch template.

---

CUSTOM_LAMBDA_FUNCTION

Terminate instances using custom termination policy with lambda.

If this is specified, you must also supply a value of lambda arn in the terminationPolicyCustomLambdaFunctionArn property.

If there are multiple termination policies specified, the custom termination policy with lambda must be specified first in the order.

See also: https://docs.aws.amazon.com/autoscaling/ec2/userguide/lambda-custom-termination-policy.html#lambda-custom-termination-policy-limitations