Deploy the twampy helm chart on AWS EKS

Question

Pulumi · Accepted Answer

To deploy the `twampy` Helm chart on AWS EKS, we need to accomplish a few tasks with Pulumi:

1. **Create an EKS cluster**: 
   This involves setting up an EKS cluster with the necessary configuration such as VPC, IAM roles, etc.
   
2. **Deploy the Helm Chart**:
   With the EKS cluster in place, we can proceed to deploy the Helm chart to the cluster.

Let's break down the steps and write the Pulumi program in TypeScript:

- **Step 1**: Everything starts with importing the necessary Pulumi packages.

- **Step 2**: Define an EKS cluster using Pulumi's EKS package.

- **Step 3**: Deploy the `twampy` Helm chart to the EKS cluster.

Here is a TypeScript program with Pulumi that does exactly that:

```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";

// Step 1: Create a new EKS cluster.
// We're using a managed node group for simplicity, but the EKS package offers a lot of configurability.
const cluster = new eks.Cluster("my-eks-cluster", {
    instanceType: "t2.medium",
    desiredCapacity: 2,
    minSize: 1,
    maxSize: 2,
    storageClasses: "gp2",
    deployDashboard: false,
});

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

// Step 2: Deploy the twampy Helm chart.
const twampyChart = new k8s.helm.v3.Chart("twampy", {
    chart: "twampy",
    version: "1.0.0", // Replace with the desired version of the Helm chart.
    fetchOpts: {
        repo: "http://example.com/helm-charts", // Replace with the actual repo URL for twampy.
    },
}, { provider: cluster.provider });

// Export the chart name of the deployed Helm chart.
export const chartName = twampyChart.name;
```

### What's happening here:

- We import the required Pulumi packages we need to work with AWS and Kubernetes resources.

- We create an EKS cluster with a managed node group by using default settings for a quick start.

- We deploy the `twampy` chart. You need to specify the correct chart version and repository URL where the chart is located. Please replace `"1.0.0"` and `"http://example.com/helm-charts"` with the actual chart version and repository URL, respectively. These details can be found in the Helm chart documentation or repository.

- We export the name of the deployed Helm chart and the kubeconfig of the EKS cluster. Kubeconfig is what you use to communicate with your Kubernetes cluster with tools like `kubectl`.

Remember to replace the placeholder values with the actual values that are relevant to your deployment scenario. Also, ensure you have configured your AWS credentials on the machine where you are running Pulumi, and have access to create these resources.

After writing this Pulumi program, you can deploy it with the following Pulumi CLI commands:

```sh
pulumi up      # To preview and deploy changes
pulumi stack export kubeconfig > kubeconfig.yaml  # To export your kubeconfig
export KUBECONFIG=kubeconfig.yaml    # To set your kubeconfig for kubectl
kubectl get pods                     # To verify your Helm chart deployment
```

You can run `pulumi destroy` if you need to tear down all resources created by your stack, and `pulumi rm` to remove the stack completely.