Deploy the twistlock-defender helm chart on Azure Kubernetes Service (AKS)

Question

Pulumi · Accepted Answer

To deploy the twistlock-defender Helm chart on an Azure Kubernetes Service (AKS) cluster using Pulumi, you will first need to create an AKS cluster. Then you will deploy the chart onto the cluster.

Here are the main steps involved:
1. **Set up AKS Cluster**: Provision an AKS cluster using Pulumi's `azure-native` package.
2. **Deploy Helm Chart**: Use Pulumi's `kubernetes` package to deploy the twistlock-defender Helm chart onto the AKS cluster.

Below is a detailed Pulumi TypeScript program that demonstrates both of these steps.

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

// Create an Azure Resource Group
const resourceGroup = new azure.resources.ResourceGroup("myResourceGroup");

// Create an AKS cluster
const cluster = new azure.containerservice.ManagedCluster("myAksCluster", {
    resourceGroupName: resourceGroup.name,
    agentPoolProfiles: [{
        count: 2,
        maxPods: 110,
        mode: "System",
        name: "agentpool",
        osType: "Linux",
        vmSize: "Standard_DS2_v2",
    }],
    dnsPrefix: "myakscluster",
    enableRBAC: true,
    kubernetesVersion: "1.20.9",
});

// Export the kubeconfig
const creds = pulumi.all([cluster.name, resourceGroup.name]).apply(([clusterName, rgName]) => 
    azure.containerservice.listManagedClusterUserCredentials({
        resourceGroupName: rgName,
        resourceName: clusterName,
    })
);

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

// Create a Kubernetes provider instance that uses our kubeconfig
const k8sProvider = new k8s.Provider("k8sProvider", {
    kubeconfig: kubeconfig,
});

// Deploy the twistlock-defender Helm chart
const chart = new k8s.helm.v3.Chart("twistlock-defender", {
    chart: "twistlock-defender", // The name of the chart, you might need to adjust this according to the actual chart name in the Helm repository.
    version: "VERSION", // Specify the chart version you want to deploy
    fetchOpts:{
        repo: "https://charts.twistlock.com" // The repository URL where the Helm chart is hosted, you might need to adjust this according to the actual repository URL.
    },
}, { provider: k8sProvider });

// Export the Cluster name and Kubeconfig
export const aksClusterName = cluster.name;
export const kubeConfig = kubeconfig;
```

In the above code, we start by importing required modules. We then create a resource group for the AKS cluster to reside in. Next, we provision an AKS cluster with the `ManagedCluster` class from the `@pulumi/azure-native` package. The `listManagedClusterUserCredentials` function retrieves the credentials necessary to interact with the AKS cluster.

For deploying the Helm chart, a `Provider` resource is created to establish the Kubernetes environment, into which we will install the Helm chart using the `Chart` class from the `@pulumi/kubernetes` package. Replace `VERSION` with the specific version of the twistlock-defender chart you wish to deploy. Make sure you have the correct chart name and repository URL; these are placeholders and should be verified against Twistlock's official Helm repository information.

We export the AKS cluster's name and kubeconfig so that they can be accessed outside the Pulumi program, which may be necessary for managing the cluster and applications post-deployment.

To run this Pulumi program:
1. Save it to a file named `index.ts`.
2. Run `npm install` to install the necessary packages from `@pulumi/azure-native` and `@pulumi/kubernetes`.
3. Run `pulumi up` to execute the code and deploy the resources and Helm chart to AKS.