Deploy the ccm-hetzner helm chart on Rancher

Question

Pulumi · Accepted Answer

Deploying a Helm chart on Rancher using Pulumi involves several steps. First, you need to have a Kubernetes cluster managed by Rancher, then you'll have to access Rancher's management capabilities, usually through its API, and finally use those capabilities to deploy a Helm chart.

Since you've specified the use of the `ccm-hetzner` Helm chart, which is a Cloud Controller Manager for Hetzner Cloud, you'll need a Kubernetes cluster running in Hetzner Cloud that is managed by a Rancher instance.

Below, you'll find a Pulumi TypeScript program that outlines the steps to deploy the `ccm-hetzner` Helm chart on a Rancher-managed Kubernetes cluster. The program assumes that you have already set up a Kubernetes cluster and a Rancher server that can manage it.

```typescript
import * as rancher2 from "@pulumi/rancher2";
import * as k8s from "@pulumi/kubernetes";
import * as pulumi from "@pulumi/pulumi";

// Step 1: Configure Rancher 2 provider
// The Rancher 2 provider needs to be configured with the access credentials to communicate with your Rancher server.
// This typically includes the Rancher API URL and an API token.
const rancher2Provider = new rancher2.Provider("rancher", {
    apiUrl: "https://your-rancher-api-url.com/v3",
    tokenKey: "your-rancher-api-token",
});

// Step 2: Access the Kubernetes cluster managed by Rancher
// You'll need to reference the cluster in Rancher where you want to deploy the Helm chart.
// For this example, we simply inquire the cluster by its ID using the rancher2.Cluster.get method.
const cluster = rancher2.Cluster.get("my-cluster", "cluster-id", undefined, { provider: rancher2Provider});

// Step 3: Create a Kubernetes provider for the targeted cluster
// Using the retrieved cluster information, we initialize a Kubernetes provider which allows Pulumi
// to deploy resources to that specific cluster.
const k8sProvider = new k8s.Provider("k8s-provider", {
    kubeconfig: cluster.kubeConfig,
});

// Step 4: Deploy the ccm-hetzner Helm chart
// Now that we have an appropriate Kubernetes provider for our target cluster, we can deploy
// the ccm-hetzner Helm chart into it. This chart installs and configures the Hetzner Cloud Controller Manager
// which is used to integrate Kubernetes with the Hetzner Cloud for node and load balancer management.
const ccmHetzner = new k8s.helm.v3.Chart("ccm-hetzner-chart", {
    chart: "ccm-hetzner",
    namespace: "kube-system", // Typically, cloud controller managers are deployed in the kube-system namespace
    // The values here depend on the Helm chart and any specific configurations you need for your cloud controller.
    values: {
        hetzner: {
            // Refer to the ccm-hetzner's values.yaml file or the corresponding documentation to know the available options
            // and provide the necessary configuration here. For example, you need to provide an API token if required.
            apiToken: "your-hetzner-api-token",
            // ... any other custom configurations
        },
    },
}, { provider: k8sProvider });

// Step 5: Export the name of the chart
export const chartName = ccmHetzner.metadata.name;
```

Make sure you replace `your-rancher-api-url.com/v3`, `your-rancher-api-token`, `cluster-id`, and `your-hetzner-api-token` with actual values from your Rancher setup and your Hetzner Cloud account.

Here's what the program does:

1. **Configure Rancher 2 Provider:** Establishes the connection with your Rancher instance by creating a `Provider` resource with the URL and token for the API.

2. **Access the Kubernetes Cluster Managed by Rancher:** Retrieves the information about your cluster managed by Rancher. In this example, this is done via the `rancher2.Cluster.get` method.

3. **Create a Kubernetes Provider:** Sets up a Kubernetes provider that is configured to interact with your Rancher-managed cluster.

4. **Deploy the ccm-hetzner Helm Chart:** Utilizes the Kubernetes provider to deploy the specified Helm chart within your cluster in the `kube-system` namespace.

5. **Export Chart Name:** As a final step, the program exports the name of the Helm chart for reference.

Please note that Helm charts often require configuration through `values`, which are specific to the chart and the environment in which you're deploying. You'll need to refer to the `ccm-hetzner` chart's documentation to determine what values make sense in your case.

This Pulumi program is a description of our desired state, Pulumi will handle the rest, making sure that the described resources are created and configured as specified.