> **Experimental**
>
> `@aws-cdk/aws-redshift-alpha` is an [**experimental**](/stability) (alpha) package: its API may change in any release, without a major version bump.
# ClusterAttributes

Properties that describe an existing cluster instance.

- Stability: [Experimental](/cdk/api/stability.html)
- Source: [`lib/cluster.ts`](https://github.com/aws/aws-cdk/blob/v2.275.0-alpha.0/packages/@aws-cdk/aws-redshift-alpha/lib/cluster.ts#L368)

## Example

```ts
// The code below shows an example of how to instantiate this type.
// The values are placeholders you should change.
import * as redshift_alpha from '@aws-cdk/aws-redshift-alpha';
import { aws_ec2 as ec2 } from 'aws-cdk-lib';

declare const securityGroup: ec2.SecurityGroup;
const clusterAttributes: redshift_alpha.ClusterAttributes = {
  clusterEndpointAddress: 'clusterEndpointAddress',
  clusterEndpointPort: 123,
  clusterName: 'clusterName',

  // the properties below are optional
  securityGroups: [securityGroup],
};
```

## Properties

- `clusterEndpointAddress`: string (required) — Cluster endpoint address.

- `clusterEndpointPort`: number (required) — Cluster endpoint port.

- `clusterName`: string (required) — Identifier for the cluster.

- `securityGroups`: [ISecurityGroup](/cdk/api/v2/docs/aws-cdk-lib.aws_ec2.ISecurityGroup.html)[] — The security groups of the redshift cluster.

  **Default:** no security groups will be attached to the import