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

Question

Pulumi · Accepted Answer

To deploy the teleport-operator Helm chart on Azure Kubernetes Service (AKS), we will perform the following steps:

1. **Provision an AKS cluster** using the `azure-native.containerservice.ManagedCluster` resource. This will create a new Kubernetes cluster in Azure.
   
2. **Install the Helm chart for teleport-operator** using the `kubernetes.helm.v3.Chart` resource. This requires the Kubernetes provider to interact with the AKS cluster that we will configure using the output of the AKS cluster provisioning.

Here is your detailed TypeScript program that accomplishes these steps:

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

// Step 1: Provision an AKS cluster
// We begin by creating a resource group to contain our AKS cluster.
const resourceGroup = new azure_native.resources.ResourceGroup("aksResourceGroup");

// Then we create the AKS cluster within the resource group.
const aksCluster = new azure_native.containerservice.ManagedCluster("aksCluster", {
    resourceGroupName: resourceGroup.name,
    agentPoolProfiles: [{
        count: 1,
        vmSize: 'Standard_DS2_v2',
        name: 'agentpool',
    }],
    dnsPrefix: 'teleport-aks', // Ensure this is unique.
    enableRBAC: true,
});

// Step 2: Configure the Kubernetes provider to connect to the AKS cluster
// The kubeconfig is obtained from the AKS cluster's properties, which allows Pulumi to communicate with our new Kubernetes cluster.
const creds = pulumi.all([aksCluster.name, resourceGroup.name]).apply(([name, rgName]) =>
    azure_native.containerservice.listManagedClusterUserCredentials({
        resourceName: name,
        resourceGroupName: rgName,
    }),
);

const kubeconfig = creds.kubeconfigs[0].value.apply((enc) => Buffer.from(enc, "base64").toString());

// Step 3: Deploy the teleport-operator Helm chart to our AKS cluster
const k8sProvider = new k8s.Provider("k8sProvider", { kubeconfig });

const teleportOperatorChart = new k8s.helm.v3.Chart("teleport-operator", {
    chart: "teleport-operator",
    version: "0.0.1", // Specify the version of the teleport-operator chart
    fetchOpts: {
        repo: "https://charts.releases.teleport.dev/",
    },
}, { provider: k8sProvider });

// Export the cluster's kubeconfig and public IP to access Teleport
export const kubeconfigOutput = aksCluster.kubeConfigRaw;
export const clusterName = aksCluster.name;
```

Let's break down the code:

- First, we import the necessary packages from Pulumi, which are Pulumi itself, the Azure-native package for interacting with Azure resources, and the Kubernetes package to deal with Helm charts.
  
- We create a new resource group for our AKS cluster, which acts as a logical container for grouping our Azure resources.

- We then provision an AKS cluster with a single node pool of `Standard_DS2_v2` size. The `dnsPrefix` you see is required and must be unique to ensure the generated Kubernetes DNS name is globally unique across Azure. Replace 'teleport-aks' with your desired DNS prefix.

- We retrieve the credentials for our AKS cluster. This `kubeconfig` will allow the Kubernetes provider, which we initialize next, to interact with our AKS cluster.

- With the Kubernetes provider configured, we deploy the `teleport-operator` Helm chart from the specified repository using the `Chart` resource. Note that you need to specify the correct version of the chart you want to deploy.

- We export the raw kubeconfig and the AKS cluster name, which you can use to access the Kubernetes cluster.

To use this code, place it in an `index.ts` file within a Pulumi project directory, and run it using the `pulumi up` command after logging into your Pulumi account and setting up your Azure credentials. The AKS cluster and the Teleport operator will be deployed on Azure accordingly.