Deploy the kube-metrics-adapter helm chart on Kubernetes

Question

Pulumi · Accepted Answer

To deploy the `kube-metrics-adapter` Helm chart on a Kubernetes cluster using Pulumi, you would use the `@pulumi/kubernetes` package which allows you to work with Kubernetes resources, including deploying Helm charts, directly in Pulumi programs.

Here is a step-by-step guide on what you will need to do, followed by a TypeScript Pulumi program that accomplishes the deployment of the `kube-metrics-adapter` Helm chart:

1. **Set up a Kubernetes cluster**: Before deploying the Helm chart, you need a Kubernetes cluster. If you don't have one, you can use Pulumi to provision a cluster on a cloud provider of your choice (AWS, GCP, Azure, etc.). For simplicity, this guide assumes you already have a Kubernetes cluster configured and Pulumi is set up with the credentials to access that cluster.

2. **Install the Pulumi CLI and set up the programming environment**: To write and run the Pulumi program, you need to have the Pulumi CLI installed and configured. If you haven't set up the environment for JavaScript/TypeScript, please refer to the [Pulumi documentation](https://www.pulumi.com/docs/get-started/kubernetes/) for guidance.

3. **Write the Pulumi program**: Below you will find a Pulumi TypeScript program that deploys the `kube-metrics-adapter` Helm chart to your Kubernetes cluster. You can customize the chart version, values, and other parameters by modifying the respective fields in the `Chart` resource definition.

4. **Deploy the program**: To deploy the Helm chart using the program, you need to run `pulumi up`. This command will show you a preview of the resources that Pulumi will create, update, or delete. You can confirm the changes to proceed with the deployment.

Now, let's move on to the actual Pulumi TypeScript program:

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

// Name for the Helm chart deployment
const helmChartName = "kube-metrics-adapter";

// Configuration for the kube-metrics-adapter Helm chart release.
// Adjust the settings as needed for your specific use case.
const kubeMetricsAdapterChart = new k8s.helm.v3.Chart(helmChartName, {
    // Replace with the correct repository and chart name
    chart: "kube-metrics-adapter",
    version: "1.0.0", // Specify the version of the chart you wish to deploy
    fetchOpts: {
        repo: "https://somehelmchartrepo.com/charts", // Specify the Helm repo URL
    },
    // Define any values that you need to pass into your Helm chart
    values: {
        // As an example, setting the log level to debug
        logLevel: "debug",
    },
    // The Kubernetes namespace in which to deploy the Helm chart
    // If not specified, it defaults to the `default` namespace.
    namespace: "kube-system",
});

// Stack exports
export const kubeMetricsAdapterChartName = helmChartName;
```

In the above program:
- We import the necessary Pulumi Kubernetes package to interact with Kubernetes resources.
- We create a new Helm chart resource, specifying its name, chart, version, repository, and any values you wish to override.
- We export the chart name as a stack export, which could then be used for further commands or outputs.

Once the above code is ready, you can deploy it with `pulumi up` in your Pulumi project directory.

Remember that the exact values and configuration options you should use will depend on your particular Kubernetes setup and the specifics of the `kube-metrics-adapter` chart. Always refer to the official Helm chart documentation for detailed information on the chart you're deploying.