Deploy the aws-rds-postgresql-database helm chart on AWS EKS

Question

Pulumi · Accepted Answer

To deploy the `aws-rds-postgresql-database` Helm chart on AWS EKS using Pulumi, you need to perform the following high-level steps:

1. Create an EKS cluster.
2. Deploy the Helm chart within the EKS cluster.

We'll be using several Pulumi resources to accomplish this:

- `aws.eks.Cluster`: This resource creates an Amazon EKS cluster.
- `kubernetes.helm.sh/v3.Chart`: This resource allows us to deploy applications via Helm charts on a Kubernetes cluster.

Below is a detailed explanation followed by the Pulumi program in TypeScript that you can use to deploy the `aws-rds-postgresql-database` Helm chart on AWS EKS.

First, ensure you have Pulumi installed and configured with your AWS account. You should also be logged into your Pulumi account via the `pulumi login` command.

Now, let's write a Pulumi program to deploy the Helm chart.

```typescript
import * as pulumi from '@pulumi/pulumi';
import * as aws from '@pulumi/aws';
import * as eks from '@pulumi/eks';
import * as k8s from '@pulumi/kubernetes';

// Create an EKS cluster with the default configurations.
// Documentation: https://www.pulumi.com/docs/reference/pkg/aws/eks/cluster/
const cluster = new aws.eks.Cluster('my-cluster', {
    // Additional cluster configuration options can be provided here.
});

// Export the cluster's kubeconfig.
export const kubeconfig = cluster.kubeconfig;

// Here we are using the Pulumi provider interface for Kubernetes to connect to the created EKS cluster.
// This way, all subsequent resources will be deployed to this EKS cluster.
const provider = new k8s.Provider('k8s-provider', {
    kubeconfig: pulumi.output(kubeconfig).apply(JSON.stringify),
});

// Now we'll deploy the aws-rds-postgresql-database Helm chart within our EKS cluster.
// For demonstration purposes, we assume that the chart is available within a Helm repository.
// Documentation: https://www.pulumi.com/docs/reference/pkg/kubernetes/helm/v3/chart/
const postgresqlDatabaseChart = new k8s.helm.v3.Chart('aws-rds-postgresql-db', {
    chart: 'aws-rds-postgresql-database',
    // Provide any additional values required by the Helm chart here. For example, you might want to
    // specify the Postgres database version, credentials, allocated resources, etc.
    values: {
        /* Insert any required config values for the aws-rds-postgresql-database chart here */
    },
}, { provider });

// Finally, we export the name of the cluster and any other details you want to access outside the program.
// Exporting the cluster name allows you to use it as a reference if needed, for example, when interfacing
// with the cluster outside of Pulumi or to access the deployed PostgreSQL service.
export const clusterName = cluster.name;
```

This program starts by creating an EKS cluster using the `aws.eks.Cluster` resource. Then, it creates an instance of the `k8s.Provider` resource configured with the kubeconfig of our EKS cluster, allowing all following Kubernetes resources to be deployed within that cluster. Finally, it deploys the PostgreSQL Helm chart to the EKS cluster using `k8s.helm.v3.Chart`.

When you execute this Pulumi program with `pulumi up`, it will prompt you to review the changes and confirm them before proceeding to provision the resources in AWS EKS.

Please replace placeholder comments with actual values as needed, particularly within the `values` object for the PostgreSQL Helm chart where database-specific configurations can be set.