How do I deploy the zookeeper-3Nodes helm chart on Digital Ocean Kubernetes Service?

To deploy the zookeeper-3Nodes Helm chart on a DigitalOcean Kubernetes Service (DOKS) using Pulumi, we need to follow these steps:

1. Create a DigitalOcean Kubernetes Cluster: We’ll start by creating a Kubernetes cluster on DigitalOcean.
2. Deploy the Helm Chart: Next, we’ll deploy the zookeeper-3Nodes Helm chart on the newly created Kubernetes cluster.

Here’s a detailed explanation of the resources we’ll use:

• digitalocean.KubernetesCluster: This resource will create a Kubernetes cluster on DigitalOcean.
• kubernetes.helm.v3.Release: This resource will deploy the zookeeper-3Nodes Helm chart on the Kubernetes cluster.

Step-by-Step Guide

1. Install Pulumi CLI: Make sure you have the Pulumi CLI installed and configured.
2. Configure DigitalOcean Provider: Ensure you have your DigitalOcean API token configured in Pulumi.
3. Create a new Pulumi Project: Initialize a new Pulumi project.

Pulumi Program in TypeScript

Below is the Pulumi program to achieve the deployment:

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

// Create a DigitalOcean Kubernetes cluster
const cluster = new digitalocean.KubernetesCluster("my-cluster", {
    region: digitalocean.Region.NYC3,
    version: "1.21.5-do.0",
    nodePool: {
        name: "default",
        size: digitalocean.DropletSlug.DropletS1VCPU2GB,
        nodeCount: 3,
    },
});

// Export the cluster's kubeconfig
export const kubeconfig = cluster.kubeConfigs[0].rawConfig;

// Create a Kubernetes provider using the cluster's kubeconfig
const k8sProvider = new k8s.Provider("k8sProvider", {
    kubeconfig: kubeconfig,
});

// Deploy the zookeeper-3Nodes Helm chart
const zookeeperChart = new k8s.helm.v3.Release("zookeeper", {
    chart: "zookeeper",
    version: "3.6.3",
    repositoryOpts: {
        repo: "https://charts.bitnami.com/bitnami",
    },
    values: {
        replicaCount: 3,
    },
}, { provider: k8sProvider });

// Export the Helm release name
export const releaseName = zookeeperChart.name;

Explanation

1. DigitalOcean Kubernetes Cluster:

   • We create a Kubernetes cluster named my-cluster in the NYC3 region.
   • The cluster uses Kubernetes version 1.21.5-do.0.
   • We define a node pool with 3 nodes, each of size s-1vcpu-2gb.

2. Kubernetes Provider:

   • We create a Kubernetes provider using the kubeconfig from the created cluster. This allows us to interact with the Kubernetes cluster.

3. Helm Release:

   • We deploy the zookeeper Helm chart from the Bitnami repository.
   • We specify the chart version 3.6.3 and set the replicaCount to 3 to create a 3-node ZooKeeper ensemble.

Running the Program

To deploy this infrastructure, follow these steps:

1. Initialize Your Pulumi Project:

   pulumi new typescript
   

2. Install Dependencies:

   npm install @pulumi/pulumi @pulumi/digitalocean @pulumi/kubernetes
   

3. Run Pulumi Up:

   pulumi up
   

This will create the DigitalOcean Kubernetes cluster and deploy the zookeeper-3Nodes Helm chart. After the deployment, you can interact with your ZooKeeper cluster using the exported release name and kubeconfig.