Using aws redshiftserverless with networking

Question

Pulumi · Accepted Answer

To create an AWS Redshift Serverless cluster with networking capabilities in Pulumi using TypeScript, you'll need to define resources that include a Redshift Serverless namespace and workgroup within an AWS Virtual Private Cloud (VPC). This involves setting up networking components such as subnets and security groups to control the network access to your Redshift Serverless instances.

Here's an outline of the steps we'll take in the Pulumi program:

1. Define a VPC and its related networking resources including subnets and security groups.
2. Create a Redshift Serverless namespace, which is a required component for creating the serverless database.
3. Set up a Redshift Serverless workgroup, specifying the networking components created previously to ensure it's properly connected within your custom VPC.
4. Provide outputs to access the key identifiers of your created resources.

Let's begin writing the Pulumi program:

```typescript
import * as pulumi from '@pulumi/pulumi';
import * as aws from '@pulumi/aws';
import * as awsx from '@pulumi/awsx';

// Step 1: Create a new VPC
const vpc = new awsx.ec2.Vpc('custom-vpc', {
  numberOfAvailabilityZones: 2,
});

// Step 2: Create a Redshift Serverless namespace
const namespace = new aws.redshiftserverless.Namespace('my-namespace', {
  // Replace with your desired values
  adminUsername: 'admin_user',
  adminUserPassword: 'SecurePassw0rd', // You would want to use the Pulumi Config to manage secret data
  namespaceName: 'my-serverless-namespace',
});

// Step 3: Create a Redshift Serverless workgroup within the VPC
const workgroup = new aws.redshiftserverless.Workgroup('my-workgroup', {
  namespaceName: namespace.namespaceName,
  workgroupName: 'my-serverless-workgroup',
  // Ensure your workgroup is connected to your subnet and security groups
  subnetIds: vpc.privateSubnetIds,
  // Optionally, you can configure more settings like enhancedVpcRouting or publiclyAccessibility
});

// Outputs
export const vpcId = vpc.id;
export const redshiftNamespace = namespace.namespaceName;
export const redshiftWorkgroup = workgroup.workgroupName;
```

### Explanation:

- **VPC and Networking:** We create a new VPC (`custom-vpc`) with two subnets across two availability zones using the `awsx.ec2.Vpc` module, which helps to provide higher availability for your Redshift serverless instances.

- **Redshift Serverless Namespace**: We create a Redshift Serverless namespace (`my-namespace`) which acts similarly to a traditional database cluster in typical Redshift.
  - `adminUsername` and `adminUserPassword` are credentials for the admin user. In production-grade code, you should manage passwords and sensitive data securely, using Pulumi's Config to store such secrets.
  - `namespaceName` is a user-friendly name for your namespace.

- **Redshift Serverless Workgroup**: A workgroup is a resource that allows you to manage a set of database resources on behalf of end-users.
  - We link this workgroup to the namespace created above via `namespaceName`.
  - `subnetIds` provided in `workgroup` associate the redshift serverless instance with certain subnets within the VPC.
  - In a production environment, you might also want to enforce more fine-grained network policies around `securityGroupIds` or enable `enhancedVpcRouting`.

- **Outputs**: At the end of the pulumi program, we export the `vpcId`, `redshiftNamespace`, and `redshiftWorkgroup` which could be beneficial for accessing these resources later on, for instance when integrating with other services or for referencing in future updates to the infrastructure.

This Pulumi program provides a blueprint for deploying a secure and networked AWS Redshift Serverless environment using TypeScript. It gives you a solid foundation that you can extend and customize based on your application's specific needs.