How Do I Configure a Kubernetes Karpenter.k8s.AWS Awsnodetemplate With Pulumi?

Introduction

In this guide, we will walk through the steps to configure a Kubernetes karpenter.k8s.AWS awsnodetemplate using Pulumi. Karpenter is an open-source node provisioning project built for Kubernetes. It automatically provisions new nodes in response to unschedulable pods. The awsnodetemplate is a custom resource definition (CRD) provided by Karpenter to define the configuration for AWS nodes.

Step-by-Step Explanation

Step 1: Install Pulumi and Set Up Your Project

1. Ensure you have Pulumi installed. If not, you can install it from Pulumi’s installation guide.
2. Create a new Pulumi project or navigate to your existing project directory.
3. Initialize a new Pulumi project using TypeScript:

   pulumi new typescript
   

Step 2: Install the Required Packages

1. Install the Pulumi Kubernetes provider:

   npm install @pulumi/kubernetes
   

2. Install the Karpenter Helm chart to deploy Karpenter in your Kubernetes cluster:

   pulumi config set kubernetes:helm:karpenter --path helm.sh/chart=karpenter --path version=0.5.0
   

Step 3: Configure the AWS Node Template

1. Create a new TypeScript file (e.g., index.ts) in your project directory.
2. Import the necessary Pulumi and Kubernetes packages:

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

3. Define the AWS Node Template resource:

   const awsNodeTemplate = new k8s.apiextensions.CustomResource("awsNodeTemplate", {
     apiVersion: "karpenter.sh/v1alpha5",
     kind: "AWSNodeTemplate",
     metadata: {
       name: "example-awsnodetemplate",
     },
     spec: {
       amiFamily: "AL2",
       subnetSelector: {
         "karpenter.sh/discovery": "my-cluster",
       },
       securityGroupSelector: {
         "karpenter.sh/discovery": "my-cluster",
       },
       instanceProfile: "KarpenterNodeInstanceProfile",
       tags: {
         "Name": "karpenter",
       },
     },
   });
   

Step 4: Deploy the Configuration

1. Run pulumi up to deploy the configuration to your Kubernetes cluster:

   pulumi up
   

2. Confirm the changes and wait for the deployment to complete.

Summary

In this guide, we covered how to configure a Kubernetes karpenter.k8s.AWS awsnodetemplate using Pulumi. We started by setting up a Pulumi project and installing the necessary packages. Then, we defined the AWS Node Template resource and deployed it to our Kubernetes cluster. This configuration allows Karpenter to provision AWS nodes based on the specified template.

Full Code Example

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

const awsNodeTemplate = new k8s.apiextensions.CustomResource("awsNodeTemplate", {
  apiVersion: "karpenter.sh/v1alpha5",
  kind: "AWSNodeTemplate",
  metadata: {
    name: "example-awsnodetemplate",
  },
  spec: {
    amiFamily: "AL2",
    subnetSelector: {
      "karpenter.sh/discovery": "my-cluster",
    },
    securityGroupSelector: {
      "karpenter.sh/discovery": "my-cluster",
    },
    instanceProfile: "KarpenterNodeInstanceProfile",
    tags: {
      "Name": "karpenter",
    },
  },
});