Deploy the kubecost helm chart on Kubernetes

Question

Pulumi · Accepted Answer

Deploying a Helm chart on a Kubernetes cluster using Pulumi is a process that involves defining the necessary resources and their configurations in your code. The primary Pulumi resource for deploying Helm charts is the `Chart` resource from the `@pulumi/kubernetes` package. Kubecost is a tool that provides cost monitoring and management for Kubernetes and can be deployed using its Helm chart.

To begin, you need to set up your Pulumi program with the necessary imports and then create a `Chart` resource for Kubecost. You can customize the deployment by providing specific values to the chart, such as the namespace to install it into, any custom values that you would like to override in the chart's `values.yaml` file, or specifying a particular version of the chart.

Here is a TypeScript program that sets up a Kubernetes cluster (assuming you have one already or you're using a Pulumi service like EKS, GKE, or AKS to manage it) and deploys Kubecost to it using its Helm chart:

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

// Create a Kubernetes Namespace
const kubecostNamespace = new k8s.core.v1.Namespace("kubecost-namespace", {
  metadata: {
    name: "kubecost"
  }
});

// Deploy the kubecost Helm chart into the created namespace
const kubecostChart = new k8s.helm.v3.Chart("kubecost", {
  namespace: kubecostNamespace.metadata.name,
  chart: "cost-analyzer",
  version: "1.89.0", // Specify the version of Kubecost you wish to deploy
  fetchOpts:{
    repo: "https://kubecost.github.io/cost-analyzer/",
  },
  // Values to pass to the Helm chart, customize these as needed
  values: {
    // Example: set the persistent storage size for Prometheus
    prometheus: {
      persistentVolume: {
        size: "20Gi"
      }
    }
  }
});

// Export the Kubecost frontend service endpoint to access the Kubecost UI
export const kubecostFrontendService = kubecostChart.getResource("v1/Service", "kubecost/cost-analyzer-frontend").status.loadBalancer.ingress[0].hostname;
```

**Explanation of the Program:**

1. **Import the Pulumi Kubernetes Package:** We import the `@pulumi/kubernetes` package, which allows us to interact with Kubernetes resources through Pulumi.

2. **Create a Kubernetes Namespace:** We create a new namespace for Kubecost using the `Namespace` class, which encapsulates a Kubernetes namespace. This namespace will host all the Kubecost-related resources.

3. **Deploy Kubecost Using Helm Chart:** We create a new `Chart` resource, which represents a Helm chart deployment in Kubernetes. We specify the `namespace` where the chart should be installed, the `chart` name (`cost-analyzer`), and the `version` of the chart. You can find the latest version of the chart and additional configurations on the [official Kubecost Helm chart repository](https://github.com/kubecost/cost-analyzer-helm-chart). The `fetchOpts.repo` points to the Helm repository where the Kubecost chart is hosted. The `values` field allows us to set configuration parameters for the chart, which override default values in the `values.yaml` file of the Helm chart. In this example, we configure the persistent storage size for Prometheus.

4. **Exporting Endpoints:** The endpoint to access the Kubecost frontend service is exported. This allows you to interact with the Kubecost UI by accessing the returned hostname. Note that this assumes you have a LoadBalancer service type that provides an external hostname or IP; you may need to adjust this depending on your Kubernetes environment and service types.

5. **Running the Program:** Save this code to a file such as `index.ts` and make sure you have Pulumi installed and configured for use with your Kubernetes cluster. From the same directory, you can run `pulumi up`, which will deploy the resources specified in the code to your cluster.

Remember to replace the chart version with the desired version of Kubecost you want to install, and update the `values` object with any custom configuration you need for your deployment. The given `values` and `version` are just examples; refer to the chart's documentation for more details on the available options.