Deploy the pvc-operator helm chart on Azure Kubernetes Service (AKS)

Question

Pulumi · Accepted Answer

To deploy the `pvc-operator` Helm chart on Azure Kubernetes Service (AKS), we'll go through the following steps:

1. **Create an AKS Cluster**: First, we provision an AKS cluster, which is a managed Kubernetes service provided by Azure that reduces the complexity of deployment and operations.
   
2. **Install Helm Chart**: Once the cluster is available, we’ll use Pulumi’s Kubernetes provider to deploy the `pvc-operator` Helm chart to our AKS cluster using the Kubernetes Helm resource feature available in Pulumi.

Below is a detailed Pulumi program in TypeScript that illustrates these steps:

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

// Step 1: Create an AKS Cluster
// We are creating a new AKS cluster. This may take a few minutes to provision.

// Create an Azure Resource Group
const resourceGroup = new azure.core.ResourceGroup("aksResourceGroup", {
    location: "East US", // You can choose a different location if needed
});

// Create the AKS Cluster and a default node pool.
const cluster = new azure.containerservice.KubernetesCluster("aksCluster", {
    resourceGroupName: resourceGroup.name,
    location: resourceGroup.location,
    defaultNodePool: {
        name: "aksagentpool",
        nodeCount: 2,
        vmSize: "Standard_DS2_v2",
    },
    dnsPrefix: `${pulumi.getStack()}-kube`,
    identity: {
        type: "SystemAssigned",
    },
});

// Export the kubeconfig
export const kubeconfig = cluster.kubeConfigRaw;

// Step 2: Install the pvc-operator Helm Chart
// Assuming the pvc-operator chart is in the Helm repository, we will add the repo and install it.

const pvcOperatorChart = new k8s.helm.v3.Chart("pvc-operator-chart", {
    chart: "pvc-operator",
    version: "1.0.0", // Specify the version of the chart.
    fetchOpts: {
        repo: "http://helm-repo/path", // Replace with the actual repository URL.
    },
    // You can specify the values as per the pvc-operator chart's requirements
    values: {},
}, { provider: new k8s.Provider("k8s-provider", { kubeconfig: cluster.kubeConfigRaw }) });

// Run `pulumi up` to deploy these resources to Azure and install the pvc-operator chart on the AKS cluster.

```

Here’s what each part of the program is doing:

- **Resource Group**: The `ResourceGroup` resource creates a new resource group in Azure where all our resources will be encapsulated.

- **AKS Cluster**: The `KubernetesCluster` resource sets up a new AKS cluster. It includes parameters like the number of nodes (`nodeCount`), VM size (`vmSize`), and an identity (which is set to system-assigned in our case).

- **Kubeconfig**: `kubeconfig` is an **output** that contains the kubeconfig contents needed to connect to the Kubernetes cluster with tools like `kubectl`.

- **Helm Chart**: The `Chart` resource from the Pulumi Kubernetes package is responsible for installing the Helm chart into the Kubernetes cluster. We’re assuming that `pvc-operator` is a Helm chart available in a repository - you need to replace the `repo` URL with the actual Helm repository URL.

- **Values**: Helm charts allow setting different values to customize the installation. In this case, we've left it empty (`{}`), but you would fill this out with the necessary Helm values for the `pvc-operator`.

Remember to replace the Helm repository URL with the actual one where the `pvc-operator` chart resides.

Before running this code, make sure:

- You have Pulumi installed and configured with Azure.
- You have `kubectl` installed and configured, in case you want to interact with the cluster.
- You have access to an Azure subscription where you can create resources.

Run `pulumi up` to deploy the resources as defined in the code. This will stand up the AKS cluster and install the `pvc-operator` Helm chart as specified.