# InstanceResizePolicyProperty

Custom policy for requesting termination protection or termination of specific instances when shrinking an instance group.

- Source: [`aws-stepfunctions-tasks/lib/emr/emr-modify-instance-group-by-name.ts`](https://github.com/aws/aws-cdk/blob/v2.275.0/packages/aws-cdk-lib/aws-stepfunctions-tasks/lib/emr/emr-modify-instance-group-by-name.ts#L116)

## Example

```ts
// The code below shows an example of how to instantiate this type.
// The values are placeholders you should change.
import * as cdk from 'aws-cdk-lib';
import { aws_stepfunctions_tasks as stepfunctions_tasks } from 'aws-cdk-lib';
const instanceResizePolicyProperty: stepfunctions_tasks.EmrModifyInstanceGroupByName.InstanceResizePolicyProperty = {
  instancesToProtect: ['instancesToProtect'],
  instancesToTerminate: ['instancesToTerminate'],
  instanceTerminationTimeout: cdk.Duration.minutes(30),
};
```

## Properties

- `instancesToProtect`: string[] — Specific list of instances to be protected when shrinking an instance group.

  **Default:** No instances will be protected when shrinking an instance group

- `instancesToTerminate`: string[] — Specific list of instances to be terminated when shrinking an instance group.

  **Default:** No instances will be terminated when shrinking an instance group.

- `instanceTerminationTimeout`: [Duration](/cdk/api/v2/docs/aws-cdk-lib.Duration.html) = cdk.Duration.seconds — Decommissioning timeout override for the specific list of instances to be terminated.