Deploy the csi-hcloud helm chart on Opensshift

Question

Pulumi · Accepted Answer

Deploying a Helm chart on an OpenShift cluster involves a few steps. With Pulumi, you can write infrastructure as code to deploy and manage this process. The csi-hcloud Helm chart is a specific chart for deploying the Hetzner Cloud CSI driver on Kubernetes, which allows the cluster to manage volumes on the Hetzner Cloud platform.

To deploy the csi-hcloud Helm chart on OpenShift, you'll use the Pulumi Kubernetes Provider, which allows you to interact with Kubernetes resources. Specifically, you'll use the kubernetes.helm.v3.Chart class to deploy a Helm chart directly.

Here's how you can do that with Pulumi in TypeScript:

Create a new directory for your Pulumi program.
Ensure that you have Pulumi CLI installed and have access to your OpenShift cluster's kubeconfig file.
Initialize a new Pulumi project within your directory with pulumi new kubernetes-typescript.
Replace the contents of index.ts with the code below.

First, let's start with installing the necessary Pulumi package for interacting with Kubernetes:

npm install @pulumi/kubernetes

Now, write the following TypeScript program to create a new Helm chart resource using Pulumi:

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

// You need to point your Pulumi program to the kubeconfig of your OpenShift cluster.
// Typically, this is done by ensuring that the `KUBECONFIG` environment variable is set,
// or you can explicitly use the kubeconfig in your Pulumi program like so:

const kubeconfig = "<path-to-your-openshift-kubeconfig>";

// Define the CSI Helm chart from Hetzner Cloud, using the Pulumi Kubernetes provider.
const csiHcloudChart = new k8s.helm.v3.Chart("csi-hcloud", {
    // Use the correct chart name and repository URL for csi-hcloud
    chart: "csi-hcloud",
    version: "<chart-version>", // specify the chart version here
    fetchOpts: {
        repo: "https://helm.hetzner.cloud", // add Helm repo URL here
    },
    // Optionally, specify the namespace where you want to install the chart.
    namespace: "default", // change this if you want to use a different namespace
    // If needed, you can pass custom values to the Helm chart by specifying `values:`
    values: {
        // Specify your customized values for the Helm chart.
    },
}, { provider: new k8s.Provider("openshift-provider", { kubeconfig }) });

export const chartName = csiHcloudChart.metadata.name;

Before you run this code, ensure that you replace placeholder strings like <path-to-your-openshift-kubeconfig> and <chart-version> with actual values that correspond to your OpenShift cluster's kubeconfig and the version of the csi-hcloud Helm chart you wish to deploy.

This program will create an instance of the csi-hcloud Helm chart in your OpenShift cluster. You declare a Chart resource, specifying the chart name (csi-hcloud), the version you wish to deploy, and the Helm repository where the chart is located. The values field can be used to customize the Helm chart by overriding default values. You should refer to the csi-hcloud chart's documentation to learn more about what values can and should be set.

The namespace parameter specifies the Kubernetes namespace where the Helm chart will be deployed. If your OpenShift cluster has specific namespaces for different types of workloads, you should change the namespace field accordingly.

Lastly, you export the name of the Helm chart so that you can easily access this information from the Pulumi stack outputs after deployment.

To run your Pulumi program, execute the following command in your terminal:

pulumi up

Running pulumi up will prompt you to confirm the deployment after showing you a preview of the resources that will be created. After you confirm, it will proceed with installing the Helm chart on your OpenShift cluster.

Remember to review the prerequisites and configuration for the csi-hcloud Helm chart, ensuring that your OpenShift cluster and Hetzner Cloud account are properly configured to allow the creation and management of persistent volumes.