Using Kubernetes Karpenter.k8s.aws With Cluster

In this solution, we will set up Kubernetes with Karpenter on AWS using Pulumi in TypeScript. Karpenter is an open-source node provisioning project built for Kubernetes. It automatically launches just the right compute resources to handle your cluster’s applications. We will create an EKS cluster, install Karpenter, and configure it to manage the cluster’s nodes.

Introduction

In this solution, we will set up Kubernetes with Karpenter on AWS using Pulumi in TypeScript. Karpenter is an open-source node provisioning project built for Kubernetes. It automatically launches just the right compute resources to handle your cluster’s applications. We will create an EKS cluster, install Karpenter, and configure it to manage the cluster’s nodes.

Step-by-Step Explanation

Step 1: Set up Pulumi and AWS

• Install Pulumi CLI and configure it with your AWS credentials.
• Create a new Pulumi project in TypeScript.

Step 2: Create an EKS Cluster

• Define the EKS cluster configuration in your Pulumi program.
• Create the EKS cluster using Pulumi.

Step 3: Install Karpenter

• Add the Karpenter Helm chart repository.
• Install Karpenter using the Helm chart.

Step 4: Configure Karpenter

• Create an IAM role for Karpenter.
• Configure Karpenter to manage the EKS cluster’s nodes.

Key Points

• Karpenter automatically provisions the right compute resources for your Kubernetes cluster.
• Pulumi allows you to define and manage your infrastructure as code.
• EKS provides a managed Kubernetes service on AWS.
• Helm is used to install and manage Kubernetes applications.

Conclusion

In this solution, we successfully set up Kubernetes with Karpenter on AWS using Pulumi in TypeScript. We created an EKS cluster, installed Karpenter, and configured it to manage the cluster’s nodes. This setup allows for efficient and automated node provisioning, ensuring that your cluster has the right resources to handle its applications.

Full Code Example

import * as pulumi from "@pulumi/pulumi";
import * as aws from "@pulumi/aws";
import * as k8s from "@pulumi/kubernetes";
import * as eks from "@pulumi/eks";

// Create an EKS cluster
const cluster = new eks.Cluster("eksCluster", {
    instanceType: "t3.medium",
    desiredCapacity: 2,
    minSize: 1,
    maxSize: 3,
    vpcId: "vpc-12345678",
    publicSubnetIds: ["subnet-12345678", "subnet-87654321"],
    privateSubnetIds: ["subnet-23456789", "subnet-98765432"],
});

// Create an IAM role for Karpenter
const karpenterRole = new aws.iam.Role("karpenterRole", {
    assumeRolePolicy: JSON.stringify({
        Version: "2012-10-17",
        Statement: [
            {
                Effect: "Allow",
                Principal: {
                    Service: "karpenter.amazonaws.com",
                },
                Action: "sts:AssumeRole",
            },
        ],
    }),
});

// Attach policies to the Karpenter role
new aws.iam.RolePolicyAttachment("karpenterPolicyAttachment", {
    role: karpenterRole.name,
    policyArn: "arn:aws:iam::aws:policy/AmazonEKSClusterPolicy",
});
new aws.iam.RolePolicyAttachment("karpenterPolicyAttachment2", {
    role: karpenterRole.name,
    policyArn: "arn:aws:iam::aws:policy/AmazonEKSVPCResourceController",
});

// Install Karpenter using Helm
const karpenterChart = new k8s.helm.v3.Release("karpenter", {
    chart: "karpenter",
    version: "0.5.0",
    repositoryOpts: {
        repo: "https://charts.karpenter.sh",
    },
    values: {
        serviceAccount: {
            create: false,
            name: "karpenter",
        },
        controller: {
            clusterName: cluster.eksCluster.name,
            clusterEndpoint: cluster.eksCluster.endpoint,
            aws: {
                defaultInstanceProfile: karpenterRole.name,
            },
        },
    },
    namespace: "karpenter",
});

export const clusterName = cluster.eksCluster.name;
export const kubeconfig = cluster.kubeconfig.apply(JSON.stringify);