Deploy the kubernetes-vault helm chart on Opensshift

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Pulumi · Accepted Answer

In this guide, I'll help you understand how to deploy a Helm chart, specifically the kubernetes-vault chart, on an OpenShift cluster using Pulumi and the Kubernetes provider. Helm is a package manager for Kubernetes that allows you to package, configure, and manage Kubernetes applications. kubernetes-vault is a Helm chart that deploys Vault on Kubernetes, which is a service for secret management.

We will be using the kubernetes.helm.v3.Chart resource from Pulumi's Kubernetes provider, which allows you to deploy Helm charts into a Kubernetes cluster. Pulumi provides a programming model to define infrastructure as code using familiar programming languages. In this case, we'll use TypeScript.

OpenShift is an enterprise Kubernetes platform, which runs on top of Kubernetes, adding some security and workflow features beneficial for enterprise use. Although Pulumi does not have special OpenShift resource types, since OpenShift is Kubernetes-based, you can use Pulumi's Kubernetes provider to deploy applications onto OpenShift clusters.

To follow along, make sure you have the following prerequisites met:

An OpenShift cluster is already running and accessible.
The oc command-line tool is configured to communicate with your OpenShift cluster.
The Pulumi CLI is installed on your machine. Pulumi will use your local oc configuration to connect to the Kubernetes cluster.
Node.js and npm are installed as Pulumi uses them to run the TypeScript program.

Here is a Pulumi program that deploys the kubernetes-vault Helm chart onto an OpenShift cluster:

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

const vaultChart = new k8s.helm.v3.Chart("kubernetes-vault", {
    // You can specify the chart version you want to deploy
    version: "0.13.0",
    // Replace <your-repo> with the name of your Helm chart's repository
    chart: "kubernetes-vault",
    // Replace <your-repository-url> with the URL of your Helm repository
    fetchOpts: {
        repo: "https://<your-repository-url>",
    },
    // If you need to specify a particular namespace, do that here
    namespace: "default",
    // If your Helm chart requires specific values, you can put them here
    values: {
        // You could put values like the number of replicas, or any other chart-specific values
        
        // Example of setting a value:
        // replicaCount: 3,
    },
});

// To obtain information like the service URL after deployment, you might want to export these values
export const vaultServiceName = vaultChart.getResource("v1/Service", "kubernetes-vault").metadata.name;

This Pulumi program does the following:

It imports the necessary Pulumi Kubernetes library.
It then creates a new Helm chart resource using the k8s.helm.v3.Chart class, specifying the name of the chart, the version, and the repository URL.
The values property is a placeholder for when you need to customize any values that the Helm chart accepts for customization.

When you run this Pulumi program with pulumi up, it will deploy the kubernetes-vault chart to your OpenShift cluster in the default namespace. If you need to deploy it in a different namespace or change configuration values, you can modify the namespace and values property respectively to meet your needs.

Make sure to replace <your-repo> and <your-repository-url> with the appropriate Helm repository name and URL where the kubernetes-vault Helm chart is located.

For more details about working with Kubernetes resources in Pulumi, you can refer to the Pulumi Kubernetes Provider documentation: Pulumi Kubernetes Provider.

Remember to run pulumi up to deploy the resources defined in the program. If you're new to Pulumi, you'll need to create a new stack, which is an isolated environment for your project. Pulumi keeps the state of your infra in stacks, allowing you to maintain multiple independent instances of your infra, such as development, staging, and production.