Deploy the pritunl-vpn helm chart on Digital Ocean Kubernetes Service

Question

Pulumi · Accepted Answer

To deploy the Pritunl VPN Helm chart on DigitalOcean Kubernetes Service (DOKS), you will need to write a Pulumi program using TypeScript. The Pulumi program will provision a Kubernetes cluster on DigitalOcean, and then it will use the Helm chart capability of Pulumi's Kubernetes provider to deploy Pritunl.

Here is a step-by-step walkthrough of what the program will do:

1. Import necessary packages for DigitalOcean cloud resources and Kubernetes resources.
2. Create a new DigitalOcean Kubernetes cluster.
3. Use `kubernetes.helm.v3.Chart` to deploy the Pritunl VPN chart from Helm's repository.

Let's start with the Pulumi program:

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

// Create a DigitalOcean Kubernetes cluster
const cluster = new digitalocean.KubernetesCluster("do-cluster", {
    // Specify the region for the cluster
    region: "nyc1",
    // Specify the version of Kubernetes
    version: "latest",
    // Define the node pool configuration
    nodePool: {
        name: "default",
        size: "s-2vcpu-2gb",
        nodeCount: 2, // Number of nodes you want in the node pool
    },
});

// Once the cluster is provisioned, we can obtain the kubeconfig
const kubeConfig = cluster.kubeConfigs[0].rawConfig;

// A Kubernetes provider instance that uses our kubeconfig
const provider = new k8s.Provider("do-k8s-provider", {
    kubeconfig: kubeConfig,
});

// Deploy the pritunl-vpn Helm chart on the cluster
const pritunlChart = new k8s.helm.v3.Chart("pritunl-vpn", {
    // We assume the chart is named 'pritunl' and is found in the official Helm repository
    chart: "pritunl",
    repo: "https://helm.pritunl.com/",
    version: "latest", // Specify the chart version you want to deploy
    namespace: "default", // Specify the namespace where the chart should be deployed
}, { provider: provider });

// Export the cluster kubeconfig
export const kubeConfigOut = pulumi.secret(kubeConfig);
```

Explanation:

- We import the necessary modules for the DigitalOcean and Kubernetes providers.
- We instantiate a new Kubernetes cluster resource with the DigitalOcean provider. In the cluster configuration, we set the desired region, Kubernetes version, and define a node pool indicating the machine size and the desired node count.
- We retrieve the kubeconfig from the provisioned cluster, which is necessary for configuring the Kubernetes provider to deploy resources onto the cluster.
- We then define the Kubernetes provider to manage resources within our DigitalOcean Kubernetes cluster.
- We deploy the Pritunl VPN Helm chart using the `k8s.helm.v3.Chart` resource. We specify the chart name, repository URL, chart version, and namespace.
- Finally, we export the kubeconfig in a secure way to prevent sensitive data leakage, which you will need to manage and interact with the cluster using tools like `kubectl`.

Take note that for this Pulumi program to run, you need to have Pulumi configured with the appropriate DigitalOcean token and have the Pulumi CLI installed on your machine. Once you have set up the DigitalOcean token as an environment variable or configured it using the Pulumi CLI, you can then run `pulumi up` to create the cluster and deploy Pritunl on it.

Keep in mind that the `version` field for both Kubernetes and Pritunl should be specified according to the versions you intend to use. The "latest" value used here will pick the latest available version which might not always be what you want for a production setup. Always check for the compatible versions on DigitalOcean and Helm repositories before you deploy.

Make sure to replace the `repo` URL with the actual Helm chart repository URL for Pritunl if it is different from what is indicated in the program.