Deploy the trivy-sbom helm chart on Azure Kubernetes Service (AKS)

Question

Pulumi · Accepted Answer

Deploying the `trivy-sbom` Helm chart on Azure Kubernetes Service involves several steps. The process consists of setting up an AKS cluster, integrating it with a container registry if required, and then using Helm to deploy the chart to the cluster.

Below is an outline of the Pulumi program we're going to write in TypeScript:

1. **Creating the AKS Cluster**: We'll define the desired AKS cluster configuration, such as node size, node count, and other relevant Kubernetes settings using the `azure.containerservice.KubernetesCluster` resource.

2. **Deploying `trivy-sbom` using Helm**: Once we have our AKS cluster up and running, we'll deploy the `trivy-sbom` Helm chart using Pulumi's `kubernetes.helm.v3.Chart` resource, which facilitates deploying Helm charts into a Kubernetes cluster.

Let's start by setting up our Pulumi program to create the AKS cluster.

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

// Step 1: Create an AKS cluster
const resourceGroup = new azure.core.ResourceGroup('aksResourceGroup');

const aksCluster = new azure.containerservice.KubernetesCluster('aksCluster', {
    resourceGroupName: resourceGroup.name,
    location: resourceGroup.location,
    defaultNodePool: {
        name: 'default',
        nodeCount: 2,
        vmSize: 'Standard_D2_v2',
    },
    dnsPrefix: `${pulumi.getStack()}-k8s`,
    identity: {
        type: 'SystemAssigned',
    },
});

// Export the kubeconfig
export const kubeconfig = aksCluster.kubeConfigRaw;
```

Now that we have defined an AKS cluster, we can use Pulumi's `kubernetes` provider to deploy the `trivy-sbom` Helm chart. We'll import this Helm chart using the `kubernetes.helm.v3.Chart` resource, as shown in the code snippet below.

```typescript
// Step 2: Deploy the "trivy-sbom" Helm chart to the AKS cluster

// Create a k8s provider using the AKS kubeconfig.
const k8sProvider = new k8s.Provider('k8sProvider', {
    kubeconfig: aksCluster.kubeConfigRaw,
});

// Deploy "trivy-sbom" Helm chart
const trivySbomChart = new k8s.helm.v3.Chart('trivy-sbom', {
    chart: 'trivy-sbom',
    version: '0.1.0', // specify the version of the chart if necessary
    namespace: 'security', // specify the namespace where the chart will be installed
    fetchOpts: {
        repo: 'https://aquasecurity.github.io/helm-charts/', // specify the Helm chart repository
    },
}, { provider: k8sProvider });

// Export the chart name
export const chartName = trivySbomChart.name;
```

In this Pulumi program:

- We create a new resource group for our AKS cluster using `azure.core.ResourceGroup`.
- We set up an AKS cluster with `azure.containerservice.KubernetesCluster`, specifying the node count and size, as well as other configurations like `dnsPrefix`. The system-assigned identity is used for the AKS cluster.
- The cluster's kubeconfig is exported to enable us to interact with it using `kubectl` or to integrate with CI/CD systems.
- We create a `k8s.Provider` which dictates the Kubernetes cluster that our Helm chart should be deployed to.
- We deploy the `trivy-sbom` Helm chart to our AKS cluster with `k8s.helm.v3.Chart`, where its `fetchOpts` property points to the Helm chart's repository.

You will see that we exported the `kubeconfig` and the `chartName`. Exporting these values can be beneficial. For example, `kubeconfig` allows access to the cluster with tools like `kubectl`, and `chartName` provides a reference to the deployed Helm chart that can be useful for monitoring or further automation tasks.

Remember to replace `trivy-sbom` and `0.1.0` with the correct chart name and version you wish to deploy. Also, be sure to use the correct Helm chart repository URL (if `trivy-sbom` has a different source). In this program, we have assumed that `trivy-sbom` is available in the specified repository and provided a version and namespace to fit the context of the deployment.

This program should provide a fully functional starting point for deploying the `trivy-sbom` Helm chart to AKS with Pulumi. Each line has comments to help you understand what's happening at each step. Run this program with Pulumi's usual workflow (`pulumi up`), and it will provision the infrastructure and deploy the Helm chart as described.