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

Properties that describe an existing cluster instance.

- Stability: [Experimental](/cdk/api/stability.html)
- Source: [`lib/cluster.ts`](https://github.com/aws/aws-cdk/blob/v2.274.0-alpha.0/packages/@aws-cdk/aws-neptune-alpha/lib/cluster.ts#L461)

## Example

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

declare const securityGroup: ec2.SecurityGroup;
const databaseClusterAttributes: neptune_alpha.DatabaseClusterAttributes = {
  clusterEndpointAddress: 'clusterEndpointAddress',
  clusterIdentifier: 'clusterIdentifier',
  clusterResourceIdentifier: 'clusterResourceIdentifier',
  port: 123,
  readerEndpointAddress: 'readerEndpointAddress',
  securityGroup: securityGroup,
};
```

## Properties

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

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

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

- `port`: number (required) — The database port.

- `readerEndpointAddress`: string (required) — Reader endpoint address.

- `securityGroup`: [ISecurityGroup](/cdk/api/v2/docs/aws-cdk-lib.aws_ec2.ISecurityGroup.html) (required) — The security group of the database cluster.