Deploy the hierarchical-namespace-controller helm chart on Azure Kubernetes Service (AKS)

Question

Pulumi · Accepted Answer

To deploy the "hierarchical-namespace-controller" helm chart on Azure Kubernetes Service (AKS), we will follow several steps:

1. **Provision an AKS Cluster**: Before we can deploy any Helm charts, we need a Kubernetes cluster. We will create an AKS cluster using the `azure-native.hybridcontainerservice.ProvisionedCluster` resource from the Azure Native Pulumi provider.

2. **Install the Helm Chart**: Once we have an AKS cluster, we will use the `kubernetes.helm.v3.Chart` resource from the Kubernetes Pulumi provider to install the "hierarchical-namespace-controller" Helm chart.

Here's a Pulumi TypeScript program to provision the resources:

```typescript
import * as pulumi from "@pulumi/pulumi";
import * as azure_native from "@pulumi/azure-native";
import * as kubernetes from "@pulumi/kubernetes";

// Step 1: Create an AKS cluster
const resourceGroupName = new azure_native.resources.ResourceGroup("myResourceGroup", {
  location: "WestUS", // You can choose a location that is appropriate for you.
});

const aksCluster = new azure_native.hybridcontainerservice.ProvisionedCluster("myAKSCluster", {
  resourceGroupName: resourceGroupName.name,
  location: resourceGroupName.location,
  // Other properties such as the cluster configuration, node pools, and network profiles
  // would be set here according to your specific requirements.
  properties: {
    // Replace with your desired cluster configuration
  },
});

// Step 2: Install the Helm chart for hierarchical namespace controller
// First, we need to create a provider that uses the newly created AKS cluster's kubeconfig.
const k8sProvider = new kubernetes.Provider("k8sProvider", {
  kubeconfig: aksCluster.kubeconfig.apply(JSON.stringify),
});

// Then we can install the Helm chart using this provider.
const hierarchicalNamespaceController = new kubernetes.helm.v3.Chart("hierarchicalNamespaceController", {
  // Assuming the chart is available in the official Helm chart repository,
  // otherwise, you would need to specify the repository URL.
  chart: "hierarchical-namespace-controller",
  // Specify the chart version if needed
  version: "0.5.0", // Check the chart's repository for the correct version to use.
  // If required, you can provide a set of values to configure the chart.
  values: {
    // Replace with your chart values
  },
}, { provider: k8sProvider });

// Export the kubeconfig as a stack output
export const kubeconfig = aksCluster.kubeconfig;
```

### Explanation

- **Resource Group**: In Azure, all resources are grouped into "resource groups". We created one for our AKS cluster.

- **AKS Cluster**: We defined a `ProvisionedCluster` resource, which represents an AKS cluster. The `properties` would include configurations such as node count, VM size, network settings, etc. Modify these according to your needs.

- **Kubernetes Provider**: To interact with our AKS cluster using Pulumi's Kubernetes provider, we created a provider resource that depends on the `kubeconfig` output of our AKS cluster.

- **Helm Chart**: We installed the "hierarchical-namespace-controller" Helm chart onto our AKS cluster using the `Chart` resource. This assumes that the chart is publicly available. If not, you might have to specify the `repo` parameter to point to the chart's repository URL.

- **Stack Output**: We exported the kubeconfig of the AKS cluster so that you can interact with your cluster using `kubectl` once it's provisioned.

Remember, this example assumes that you have configured your Pulumi CLI with the appropriate Azure credentials. You need to install the `@pulumi/azure-native` and `@pulumi/kubernetes` packages:

```sh
npm install @pulumi/azure-native @pulumi/kubernetes
```

You also need to set up the Azure CLI and log in with an account that has permissions to create resources in your subscription. When you run `pulumi up`, Pulumi will provision the resources defined in the code. The output of the `kubeconfig` will be displayed after the successful deployment, and you can use it to interact with your AKS cluster via `kubectl`.