Deploy the wireguard-pia helm chart on Linode Kubernetes Engine

Question

Pulumi · Accepted Answer

To deploy the WireGuard PIA Helm chart on the Linode Kubernetes Engine (LKE) using Pulumi, you will need to perform several steps. In this task, you'll write a Pulumi program in typescript that accomplishes the following:

1. Provision a Kubernetes cluster on Linode.
2. Install the Helm Chart for WireGuard PIA on the provisioned Kubernetes cluster.

To achieve this, you'll utilize Pulumi's Linode and Kubernetes providers. The Linode provider will allow you to create and manage resources on Linode, while the Kubernetes provider will enable you to interact with the Kubernetes cluster and deploy Helm charts.

Let's start by setting up the Linode Kubernetes cluster using Pulumi.

First, you need to configure the Pulumi Linode provider to ensure that Pulumi can communicate with your Linode account. To do this, you should have the Linode API token set in your environment variables or Pulumi configuration. This allows Pulumi to authenticate requests on your behalf.

Next, you will create a new instance of the Kubernetes cluster within Linode using the applicable Pulumi resource. Once the cluster is provisioned, you will obtain its kubeconfig, which is required to interact with the cluster using the Kubernetes API.

Following the cluster provisioning, you will configure the Pulumi Kubernetes provider to connect to the newly created LKE cluster using the kubeconfig acquired from the previous step.

Finally, you will deploy the WireGuard PIA Helm chart on the LKE cluster. To accomplish this, you will use Pulumi's Helm chart resource from the Kubernetes provider. The Helm chart resource allows you to specify the chart name, repository, values, and other relevant configurations necessary for deploying the Helm chart.

Here's a detailed Pulumi TypeScript program that outlines each step with comments describing what is happening at each stage:

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

// Create a new Linode Kubernetes cluster.
const cluster = new linode.LkeCluster("wireguard-cluster", {
    label: "wireguard-cluster",
    k8sVersion: "1.20", // Replace with the version you want to use
    region: "us-central", // Specify the data center region for the cluster
    tags: ["pulumi-cluster"],
    pool: {
        count: 3, // Specify the number of nodes
        type: "g6-standard-2", // Specify the type of node
    },
});

// Export the kubeconfig file for the Kubernetes cluster.
export const kubeconfig = cluster.kubeconfig;

// Use the exported kubeconfig to create a Kubernetes provider instance.
const k8sProvider = new k8s.Provider("k8sProvider", {
    kubeconfig: kubeconfig.apply(JSON.stringify),
});

// Deploy the wireguard-pia Helm chart onto the Linode Kubernetes cluster using Pulumi.
// You should have the Helm repository containing the WireGuard PIA chart. This example uses placeholder values.
const wireguardChart = new k8s.helm.v3.Chart("wireguard-pia", {
    chart: "wireguard-pia",
    version: "1.0.0", // The chart version that you want to deploy
    fetchOpts:{
        repo: "https://example.com/helm-charts/", // Replace with the actual Helm chart repository URL
    },
    // You can specify additional Helm values here, as needed.
}, { provider: k8sProvider });

// If the Helm chart produces any important outputs, such as a LoadBalancer endpoint or similar resources,
// you may wish to export them here.
export const wireguardEndpoint = wireguardChart.getResourceProperty("v1/Service", "wireguard-pia", "status").apply(s => s.loadBalancer.ingress[0].ip);
```

### Explanation:

- **Linode Kubernetes Cluster**: We start by provisioning a new Kubernetes cluster in the specified Linode region with the required number of nodes and the specified node type.

- **Kubeconfig Export**: The `kubeconfig` is exported so that it can be used to communicate with the Kubernetes cluster. It acts as the credentials for the cluster.

- **Kubernetes Provider**: The kubeconfig is used to create an instance of the Kubernetes provider which Pulumi uses to deploy applications to the cluster.

- **WireGuard PIA Helm Chart**: We then deploy a Helm chart named `wireguard-pia`. Note that you need to specify the proper chart version and the Helm repository URL where the chart is hosted.

- **Outputs**: Finally, we export the endpoint under which the WireGuard PIA service can be accessed. This assumes the Helm chart creates a `Service` of type `LoadBalancer` and that this service is labeled `wireguard-pia`.

### Next Steps:

You would need to do a `pulumi up` to apply this Pulumi program and provision resources. The program defines a new cluster and deploys a Helm chart into it.

Replace placeholder values like the Helm repository URL with actual information relevant to your use case. Additionally, you might want to add further Helm values depending on the chart's requirement or your configuration preferences. Make sure the Helm chart version is also correct and compatible with your Kubernetes cluster version.