Deploy Herm Chart on Digitalocean K8s

In this solution, we will deploy a Helm chart on a DigitalOcean Kubernetes cluster using Pulumi in TypeScript. The key services involved in this solution are DigitalOcean Kubernetes (DOKS) and Helm. Pulumi will be used to manage the infrastructure as code.

Introduction

In this guide, we will demonstrate how to deploy a Helm chart on a DigitalOcean Kubernetes cluster using Pulumi in TypeScript. Helm is a package manager for Kubernetes that allows you to define, install, and upgrade complex Kubernetes applications. DigitalOcean Kubernetes (DOKS) is a managed Kubernetes service that makes it easy to deploy, manage, and scale Kubernetes clusters. Pulumi is an infrastructure as code tool that allows you to define and manage cloud resources using familiar programming languages.

Step-by-Step Explanation

Step 1: Install Pulumi and Dependencies

First, ensure that you have Pulumi, Node.js, and npm installed on your machine. You can install Pulumi by following the instructions on the Pulumi website.

Step 2: Create a New Pulumi Project

Create a new Pulumi project by running the following commands:

mkdir pulumi-doks-helm
cd pulumi-doks-helm
pulumi new typescript

Step 3: Install Pulumi DigitalOcean and Kubernetes Providers

Install the Pulumi DigitalOcean and Kubernetes providers by running the following commands:

npm install @pulumi/digitalocean @pulumi/kubernetes

Step 4: Configure DigitalOcean Provider

Create a new file named Pulumi.<stack-name>.yaml and add your DigitalOcean API token to it. The file should look like this:

config:
  digitalocean:token: <your-digitalocean-api-token>

Step 5: Define the DigitalOcean Kubernetes Cluster

In the index.ts file, define the DigitalOcean Kubernetes cluster as follows:

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

const cluster = new digitalocean.KubernetesCluster("my-cluster", {
  region: "nyc1",
  version: "1.21.5-do.0",
  nodePool: {
    name: "default",
    size: "s-2vcpu-4gb",
    nodeCount: 3,
  },
});

export const kubeconfig = cluster.kubeConfigs[0].rawConfig;

Step 6: Deploy the Helm Chart

Next, use the Kubernetes provider to deploy the Helm chart. Add the following code to the index.ts file:

const k8sProvider = new k8s.Provider("k8s-provider", {
  kubeconfig: kubeconfig,
});

const nginx = new k8s.helm.v3.Chart("nginx", {
  chart: "nginx",
  version: "9.3.2",
  fetchOpts: {
    repo: "https://charts.bitnami.com/bitnami",
  },
}, { provider: k8sProvider });

Step 7: Deploy the Stack

Finally, deploy the stack by running the following command:

pulumi up

Key Points

• Pulumi allows you to manage cloud resources using familiar programming languages.
• DigitalOcean Kubernetes (DOKS) is a managed Kubernetes service that simplifies the deployment and management of Kubernetes clusters.
• Helm is a package manager for Kubernetes that makes it easy to define, install, and upgrade complex Kubernetes applications.
• By using Pulumi, you can define and manage your infrastructure as code, making it easier to version control and automate deployments.

Conclusion

In this guide, we demonstrated how to deploy a Helm chart on a DigitalOcean Kubernetes cluster using Pulumi in TypeScript. We covered the installation of Pulumi and its dependencies, the creation of a new Pulumi project, the configuration of the DigitalOcean provider, the definition of the Kubernetes cluster, and the deployment of the Helm chart. By following these steps, you can easily manage your Kubernetes applications and infrastructure using Pulumi and Helm.

Full Code Example

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

const cluster = new digitalocean.KubernetesCluster("my-cluster", {
  region: "nyc1",
  version: "1.21.5-do.0",
  nodePool: {
    name: "default",
    size: "s-2vcpu-4gb",
    nodeCount: 3,
  },
});

export const kubeconfig = cluster.kubeConfigs[0].rawConfig;

const k8sProvider = new k8s.Provider("k8s-provider", {
  kubeconfig: kubeconfig,
});

const nginx = new k8s.helm.v3.Chart("nginx", {
  chart: "nginx",
  version: "9.3.2",
  fetchOpts: {
    repo: "https://charts.bitnami.com/bitnami",
  },
}, { provider: k8sProvider });