Deploy the prometheus-freebox-exporter helm chart on Kubernetes

Question

Pulumi · Accepted Answer

Deploying a Helm chart to a Kubernetes cluster using Pulumi is straightforward. In this case, we want to deploy the `prometheus-freebox-exporter` Helm chart. To deploy a Helm chart, we'll use the `Chart` resource from the Pulumi Kubernetes provider.

Here's how you would accomplish that in TypeScript using Pulumi:

1. **Setup Your Project**: First, you would need a Pulumi project. If you haven't done so, you would use `pulumi new` to create a new project in the language of your choice (TypeScript, in this case).

2. **Install the Pulumi Kubernetes Package**: You'll need to have the Pulumi Kubernetes SDK installed in your project. This is done using `npm` or `yarn` for TypeScript projects. Run `npm install @pulumi/kubernetes` or `yarn add @pulumi/kubernetes` in your project directory.

3. **Write Your Pulumi Code**: Below is a Pulumi program in TypeScript that deploys the `prometheus-freebox-exporter` Helm chart to a Kubernetes cluster.

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

// Specify the namespace where the Helm chart should be deployed.
const namespace = "default";

// Deploy the 'prometheus-freebox-exporter' Helm chart.
const prometheusFreeboxExporter = new k8s.helm.v3.Chart("prometheus-freebox-exporter", {
    // Replace 'REPO_NAME' with the actual Helm repository name,
    // and 'REPO_URL' with the repository URL where the chart is hosted.
    repo: "REPO_NAME",
    chart: "prometheus-freebox-exporter",
    version: "CHART_VERSION", // Specify the chart version you wish to deploy
    namespace: namespace,
    // If there are any custom values you wish to override in the chart,
    // specify them here, otherwise this field can be omitted or left empty.
    values: {
        // Example of custom values. Replace with actual values of the chart.
        // service: {
        //     type: "LoadBalancer",
        // },
    },
}, { provider: /* specify your k8s provider if necessary */ });

export const chartName = prometheusFreeboxExporter.metadata.name;
```

4. **Run Your Pulumi Program**: Use `pulumi up` to preview and deploy your changes. Pulumi will show you a preview and, upon confirmation, perform the deployment.

### Important Notes

- `namespace`: Make sure to deploy the Helm chart in the correct Kubernetes namespace. In the example, we're using the `default` namespace. Change this to the namespace you want the chart to be deployed in.
- `repo`: You will need to replace `REPO_NAME` with the name of the Helm repository where the `prometheus-freebox-exporter` chart is located.
- `chart`: The name of the chart to deploy, which in this case is `prometheus-freebox-exporter`.
- `version`: Replace `CHART_VERSION` with the specific version of the `prometheus-freebox-exporter` chart you want to install.
- `values`: This is a JavaScript object that should mirror the structure of the `values.yaml` in the Helm chart itself. If the chart requires certain values to be set or you want to customize the deployment, you set them here.
- `provider`: If you're working with a Kubernetes provider (like EKS, AKS, GKE, etc.), make sure to set the provider info accordingly. Otherwise, Pulumi will use the default provider configured in your kubeconfig.

After you run `pulumi up`, Pulumi will perform the deployment, and you will see the resources being created in your terminal. Once the deployment is successful, you can check the Kubernetes resources created by the Helm chart using `kubectl` or Pulumi's output exports.