Deploy the c8r-opencost helm chart on Azure Kubernetes Service (AKS)

Question

Pulumi · Accepted Answer

To deploy the `c8r-opencost` Helm chart on Azure Kubernetes Service (AKS), we will follow these steps:

1. Set up an AKS cluster: This involves creating a resource group and then provisioning an AKS cluster within it.

2. Deploy the Helm chart to the AKS cluster: Once the AKS cluster is ready, we can use Pulumi's Helm chart resource to deploy `c8r-opencost` onto the cluster.

Let's go through the process step by step.

### Step 1: Setting Up an Azure Kubernetes Service Cluster

First, we need to provision an AKS cluster to host our `c8r-opencost` application. We will use the `azure-native` provider for this purpose, which allows us to work directly with Azure resources in a more Azure-native manner.

We'll define the necessary resources such as a resource group and the AKS cluster itself. For AKS, we will specify the required properties such as the version of Kubernetes, the size of the default node pool, and the location.

### Step 2: Deploying the Helm Chart

Once the cluster is deployed, we'll use Pulumi's Kubernetes provider to interact with it. The `kubernetes.helm.v3.Chart` resource from the Pulumi Kubernetes provider enables us to deploy Helm charts into our AKS cluster. We'll specify the chart name (`c8r-opencost` in this case), repository details, and other release settings.

Let's begin with a Pulumi program in TypeScript to accomplish the above.

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

// Step 1: Create a resource group
const resourceGroup = new azure.core.ResourceGroup("resourceGroup", {
    location: "East US", // Change to the desired location
});

// Step 2: Create an AKS cluster
const aksCluster = new azure.containerservice.KubernetesCluster("aksCluster", {
    // Use an existing resource group name
    resourceGroupName: resourceGroup.name,
    // Use an existing DNS prefix or create a new one
    dnsPrefix: `${pulumi.getStack()}-kube`,
    defaultNodePool: {
        name: "default",
        nodeCount: 2,
        vmSize: "Standard_D2_v2",
    },
    identity: {
        type: "SystemAssigned",
    },
    // Choose a valid Kubernetes version
    kubernetesVersion: "1.20.5",
});

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

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

// Reference to the AKS cluster using the Kubernetes provider
const helmChart = new k8s.helm.v3.Chart("c8r-opencost", {
    // Helm chart details
    chart: "opencost",
    version: "0.1.0", // Use the appropriate chart version
    fetchOpts:{
        repo: "https://helm.YOUR_HELM_CHART_REPO.com", // Replace with the Helm chart repository
    },
    // Specify namespace or leave it to default
    namespace: "cost-management"
}, { provider: k8sProvider });

// Export the Helm chart status
export const helmChartStatus = helmChart.status;
```

In this program, replace `YOUR_HELM_CHART_REPO` with the URL of the repository where the `c8r-opencost` Helm chart is located. Also, make sure to select the correct [Kubernetes version](https://docs.microsoft.com/en-us/azure/aks/supported-kubernetes-versions) supported by AKS at the time of deployment. Adjust the `vmSize` if necessary to meet your workload requirements.

This script creates an AKS cluster and then uses the Helm provider to deploy the `c8r-opencost` chart onto it. You could expand the `helmChart` resource's properties to include specific configurations for your `c8r-opencost` deployment by providing a `values` argument.

To run this Pulumi program, save it as `index.ts` in a new Pulumi project directory. Make sure you have Pulumi and the required dependencies installed, and you have authenticated with Azure.

Let me know if you need further clarification or assistance setting this up!