Deploy the git-repo helm chart on AWS EKS

Question

Pulumi · Accepted Answer

To deploy a Helm chart on an Amazon EKS cluster, we need to complete several steps. Here, we’ll create an EKS cluster using Pulumi’s EKS package, which simplifies the process. Once we have the cluster, we will deploy the helm chart from a git repository to this cluster.

First, make sure you have the following prerequisites on your local machine:

Pulumi CLI installed
AWS CLI installed and configured with your credentials
kubectl installed to interact with the Kubernetes cluster
Helm CLI installed to work with Helm charts

For the purpose of this code, we will not include the actual fetching of the git-repo helm chart as it could involve multiple steps, such as cloning the repo or setting up authentication, which is beyond the scope of this deployment. We will use Pulumi’s Kubernetes package to apply a Helm chart to the EKS cluster.

Here is the program in TypeScript that outlines these steps:

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 an EKS cluster.
const cluster = new eks.Cluster("my-cluster", {
    instanceType: "t2.medium",
    desiredCapacity: 2,
    minSize: 1,
    maxSize: 3,
});

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

// Step 2: Deploy a Helm chart to the EKS cluster.
const helmChart = new k8s.helm.v3.Chart("my-chart", {
    chart: "git-repo-chart", // Replace this with your helm chart name.
    version: "1.0.0", // Replace this with your chart version.
    fetchOpts: {
        repo: "http://<git-repo-url>", // Replace this with your Helm repository URL.
    },
}, { provider: new k8s.Provider("k8s-provider", { kubeconfig: cluster.kubeconfig }) });

// Step 3: Export the Helm deployment.
export const helmDeployment = helmChart.status;

Please replace <git-repo-url> with the actual URL of your git repository that contains the Helm chart.

The program begins by importing the required Pulumi libraries for AWS, EKS, and Kubernetes. We then create an EKS cluster with t2.medium instances and a scaling configuration appropriate for our needs.

Once the cluster is up and running, we can create a new Helm chart resource using the k8s.helm.v3.Chart class from the Pulumi Kubernetes package. We specify the chart name, version, and fetchOpts where you put your actual Helm chart repository URL. Note that we are passing a provider instance to the Helm chart that uses the kubeconfig from the EKS cluster we created, ensuring that operations on Helm are applied to our newly created cluster.

Finally, we export the kubeconfig and helm deployment status as output from our Pulumi stack which can be used to access and manage the cluster afterward.

Make sure to replace the placeholders with actual values relevant to your deployment. Save this script to a file, such as index.ts, and run it using pulumi up to deploy your EKS cluster and Helm chart.