Deploy the prometheus-container-resource-exporter helm chart on Rancher

Question

Pulumi · Accepted Answer

To deploy a Helm chart, such as the `prometheus-container-resource-exporter`, on a Rancher-managed Kubernetes cluster using Pulumi, you'll first need to have access to a Rancher Kubernetes cluster and have the `rancher2` provider configured in your Pulumi program.

You would typically use the `rancher2` provider to manage resources within a Rancher instance, such as clusters, workloads, and apps, including Helm chart deployments. However, in the provided Pulumi Registry Results, there isn't a direct resource for deploying a Helm chart via the `rancher2` provider. If this functionality is available in the `rancher2` provider but not listed, you would follow the provider's documentation to deploy a Helm chart.

Here I'll demonstrate how you can define a Pulumi program that assumes you already have a Rancher-managed Kubernetes cluster. The program will use Pulumi's Kubernetes provider to deploy a Helm chart into this cluster.

Here's what you need to do:

1. **Set up Kubernetes Provider:** Configure the Pulumi Kubernetes provider to connect to your Rancher Kubernetes cluster. This could involve setting the `kubeconfig` context to point to your Rancher cluster.

2. **Deploy Helm Chart:** Use the `helm.v3.Chart` class from Pulumi's Kubernetes provider to deploy the `prometheus-container-resource-exporter` Helm chart into your cluster.

Below is a TypeScript program that demonstrates the deployment steps:

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

// Step 1: Configure the Kubernetes provider to connect to your Rancher Kubernetes cluster.
const kubeconfig = "<YOUR_RANCHER_CLUSTER_KUBECONFIG>";

// Instantiate the Kubernetes provider with the kubeconfig.
const k8sProvider = new k8s.Provider("k8s-provider", {
    kubeconfig: kubeconfig,
});

// Step 2: Deploy the 'prometheus-container-resource-exporter' Helm chart.
const prometheusChart = new k8s.helm.v3.Chart("prometheus-exporter", {
    chart: "prometheus-container-resource-exporter",
    // You'd replace 'CHART_REPO_URL' with the actual chart repository URL
    // and optionally specify the 'version', 'namespace', or 'values' properties.
    fetchOpts: {
        repo: "CHART_REPO_URL",
    },
}, { provider: k8sProvider });

// Export the name of the chart deployment
export const chartName = prometheusChart.metadata.apply(meta => meta.name);
```

In this program:

- The `kubeconfig` needs to be replaced with the actual configuration content or path to your Rancher Kubernetes cluster's kubeconfig file.
- The `fetchOpts.repo` should be replaced with the URL of the chart repository where `prometheus-container-resource-exporter` is hosted.

You should ensure you have the correct chart name and other configurations required for the `prometheus-container-resource-exporter` chart, including setting the `namespace` if needed.

This program assumes you have already set up Pulumi and logged into an account where you can run Pulumi programs. Run the program with the Pulumi CLI by executing `pulumi up` after saving the code in a file with a `.ts` extension. The program will prompt you for confirmation before proceeding to deploy the Helm chart to your Rancher Kubernetes cluster.

Remember, managing Kubernetes resources with Pulumi requires a good understanding of Kubernetes concepts and the specifics of the resources you're deploying. Always refer to the official Helm chart documentation for any configuration and details needed to deploy the chart appropriately.