Deploy the rke2-calico-crd helm chart on Rancher

Question

Pulumi · Accepted Answer

To deploy the `rke2-calico-crd` helm chart on Rancher using Pulumi, we'll need to follow a series of steps:

1. **Set up the Rancher provider**: This allows us to interact with the Rancher API. It requires the URL of the Rancher instance and an API token.

2. **Create a Kubernetes cluster**: Since helm charts are deployed onto a Kubernetes cluster, we need an existing Kubernetes cluster managed by Rancher.

3. **Install the Helm Chart**: We will install the `rke2-calico-crd` helm chart on the Kubernetes cluster.

Below is a Pulumi program written in TypeScript that outlines these steps, along with comments explaining each part of the code.

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

// Initialize the Rancher provider with the required configuration.
// You need to provide the Rancher instance URL and the API token.
const rancherProvider = new rancher2.Provider("my-rancher-provider", {
    apiToken: "YOUR_RANCHER_API_TOKEN",
    apiUrl: "YOUR_RANCHER_API_URL",
});

// Assume that 'rancher-cluster-id' is provided externally, e.g., from a previously created Rancher cluster.
const rancherClusterId = "existing-rancher-cluster-id";

// Create a Kubernetes Provider pointing to the Rancher-managed cluster.
// This uses the output properties of the Rancher cluster to configure the provider.
const k8sProvider = new k8s.Provider("my-k8s-provider", {
    kubeconfig: rancher2.Cluster.get("cluster", rancherClusterId, { provider: rancherProvider }).kubeConfig,
}, { dependsOn: [rancherProvider] });

// Deploy the rke2-calico-crd Helm chart to the cluster.
const helmChart = new k8s.helm.v3.Chart("rke2-calico-crd", {
    chart: "rke2-calico-crd",
    version: "CHART_VERSION", // specify the version of the Helm chart
    fetchOpts: {
        repo: "https://helm.rancher.io",
    },
}, { provider: k8sProvider });

// Export the name of the chart we installed.
export const helmChartName = helmChart.metadata.apply(m => m.name);
```
In the above code, replace `YOUR_RANCHER_API_TOKEN` and `YOUR_RANCHER_API_URL` with your own Rancher API credentials. Also, replace `CHART_VERSION` with the specific version of the `rke2-calico-crd` you wish to install.

Keep in mind that you might need to add additional configurations to the chart depending on your specific needs, like setting values for the `values` property of the `helm.v3.Chart` resource. The given code assumes that the `rke2-calico-crd` chart is available in the Rancher helm chart repository. If it's in a different repository, adjust the `repo` URL accordingly.

Note that I'm assuming there's an existing Rancher cluster identified by `existing-rancher-cluster-id`. If you need to create a new Rancher cluster, you would use the `rancher2.Cluster` resource, providing the necessary configuration according to your environment.

This Pulumi program creates an instance of the Rancher provider, creates a Kubernetes provider that points to the existing cluster managed by Rancher, and finally, installs the Helm chart on that cluster. After running `pulumi up` with this program, the `rke2-calico-crd` helm chart will be deployed to the specified Rancher Kubernetes cluster.