Deploy the rook-operator helm chart on Kubernetes

Question

Pulumi · Accepted Answer

To deploy the `rook-operator` Helm chart on Kubernetes using Pulumi, you'd typically leverage the `@pulumi/kubernetes` library. This library provides a way to declare Kubernetes resources, including Helm charts, using TypeScript. Here, we will use the `Chart` resource, which represents a Helm chart.

Before we get started with the code, make sure you have the following prerequisites completed:
- Pulumi CLI installed and set up with an appropriate backend.
- Kubernetes cluster configured and the `kubeconfig` file is correctly set up on your machine.
- Helm chart information for `rook-operator` is known, such as the chart name and the repository it resides in.

Below is a Pulumi program in TypeScript that deploys the `rook-operator` Helm chart to a Kubernetes cluster.

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

// Create a Kubernetes namespace for Rook Operator if you want to isolate it.
const rookNamespace = new k8s.core.v1.Namespace("rook-ns", {
    metadata: {
        // You can add additional metadata if needed
        name: "rook-operator",
    },
});

// Deploy the Rook Operator Helm chart in the Kubernetes cluster.
const rookOperatorChart = new k8s.helm.v3.Chart("rook-operator-chart", {
    chart: "rook-ceph",
    version: "v1.5.9", // Use the correct chart version
    namespace: rookNamespace.metadata.name, // Deploy to the created namespace
    // Specify the Helm repository that contains the Rook Operator chart
    fetchOpts: {
        repo: "https://charts.rook.io/release",
    },
    // If you need to provide custom values to the chart, you can specify them here.
    // Otherwise, you can omit the 'values' field to use the defaults.
    values: {
        // Replace with the necessary chart values
    },
});

// Export the Namespace name and the Chart name
export const namespaceName = rookNamespace.metadata.name;
export const chartName = rookOperatorChart.metadata.name;
```

Here is what's happening in the program:
- We start by importing the Pulumi Kubernetes SDK.
- We create a new Kubernetes `Namespace` resource called `rook-ns`. Namespaces are a way to divide cluster resources between multiple users.
- We define a `Chart` resource to deploy the `rook-operator` chart from the specified Helm chart repository. Replace `v1.5.9` with the correct version of the `rook-operator` chart you wish to deploy.
- You can also specify configuration options according to your needs inside the `values` object. For instance, you can customize storage options and versions.
- We export the namespace and chart names to use them easily with Pulumi CLI or in automated CI/CD pipelines.

To apply this Pulumi program, save it to a file named `index.ts`, and run the following commands in the same directory as the file:

```sh
pulumi up
```

This command will prompt you with a summary of the deployment plan. Confirm the plan to proceed with the deployment to your Kubernetes cluster. Pulumi will use your local `kubeconfig` to communicate with your Kubernetes cluster and deploy the Helm chart.

Pulumi provides a declarative approach to manage cloud resources, which includes managing Kubernetes resources through code, allowing easy tracking of resource changes in version control, systematic deployments, and repeatability across environments.