Deploy the nuxt2-spa helm chart on Rancher

Question

Pulumi · Accepted Answer

To deploy a Helm chart on Rancher, you would typically follow these general steps:

1. **Set up your Rancher environment** where you'll be deploying the chart. This includes creating or configuring a Kubernetes cluster managed by Rancher, setting up access controls, and getting the `kubectl` CLI configured to interact with your cluster.

2. **Locate or prepare your Helm chart.** For the nuxt2-spa, you might find a pre-existing chart or create your own. Helm charts are packages of pre-configured Kubernetes resources.

3. **Install the Helm chart** using either the Rancher UI or the `helm` CLI tool which must be configured to interact with the Rancher-managed cluster.

With Pulumi, you can automate the deployment process with infrastructure as code. The TypeScript program below represents a basic way to deploy a Helm chart to a Kubernetes cluster managed by Rancher. Note that it assumes:

- You have access to a Rancher-managed Kubernetes cluster.
- You have the Helm chart for `nuxt2-spa` available.
- Pulumi and the necessary provider packages are installed and configured.

I'll demonstrate using an example Helm chart called `nuxt2-spa`. Please replace the placeholders with actual values from your Helm chart and Rancher setup.

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

// Initialize a Rancher2 provider instance using the environment variables for access.
const rancher2Provider = new rancher2.Provider("rancher2", {
    apiUrl: "https://your-rancher-api-url.com/v3",
    accessKey: "your-access-key",
    secretKey: "your-secret-key"
});

// Refer to an existing Rancher2 cluster where you want to deploy your Helm chart.
const cluster = rancher2.Cluster.get("existing-cluster", "cluster-id");

// Set up the Kubernetes provider to deploy the Helm chart.
// This provider uses the kubeconfig from the referenced Rancher2 cluster.
const k8sProvider = new k8s.Provider("kube-provider", {
    kubeconfig: cluster.kubeConfig
});

// Deploy the nuxt2-spa Helm chart to the Rancher-managed cluster.
const nuxt2Chart = new k8s.helm.v3.Chart("nuxt2-spa-chart", {
    chart: "nuxt2-spa",
    version: "your-chart-version", // specify the chart version
    namespace: "default", // specify the namespace if not default
    // Values to configure the Nuxt2 SPA. Replace these with your actual values.
    values: {
        key: "value",
        // other values required by the chart
    },
}, { provider: k8sProvider });

// Export the URL of the deployed application.
// Replace `service` with the actual service of your Nuxt application.
export const appUrl = nuxt2Chart.getResourceProperty("v1/Service", "nuxt2-service", "status")
    .apply(status => `http://${status.loadBalancer.ingress[0].ip}`);
```

### Explanation:

- **Rancher2 Provider:** Sets up a Pulumi provider for Rancher2 resources. Requires API URL and credentials that can be provided as environment variables or directly through the program for simplicity.

- **Cluster Reference:** Uses the Pulumi `@pulumi/rancher2` module to refer to an existing cluster. Replace `"cluster-id"` with your actual Rancher2 cluster ID.

- **Kubernetes Provider:** Sets up a Pulumi provider for deploying resources to the Kubernetes cluster managed by Rancher (retrieved through `kubeConfig` of the cluster resource).

- **Helm Chart Deployment:** This component deploys the `nuxt2-spa` Helm chart using Pulumi's `@pulumi/kubernetes` module. Replace the `chart`, `version`, `namespace`, and `values` with suitable values for your chart.

- **Exporting the Application URL:** After deploying the chart, this exports the external IP assigned to your `nuxt2-spa` service so you can access it. Adjust `"nuxt2-service"` to match the name of your service.

Please replace placeholder values with actual values required for your setup. The chart name, version, namespace, and values should match what's needed for the `nuxt2-spa` Helm chart.

This program is a starting point, and depending on the complexities of your Rancher environment and the nuxt2-spa Helm chart, you might need to customize the configuration further.