Deploy the pritunl-vpn helm chart on Oracle Kubernetes Engine (OKE)

Question

Pulumi · Accepted Answer

To deploy the Pritunl VPN Helm chart on Oracle Kubernetes Engine (OKE), we will follow these steps:

1. **OCI Container Repository**: Before deploying the Helm chart, we need a container repository. Although not directly related to the Helm chart deployment, this repository is where the container images for your application would be stored. For the purpose of deploying a Helm chart, we won't create one actively in this script, but it's worth knowing that the `oci.Artifacts.ContainerRepository` resource is used for this if you need to manage container images.

2. **Helm Chart**: Helm is a package manager for Kubernetes, which allows us to define, install, and upgrade even the most complex Kubernetes applications. The chart is a collection of files that describe a related set of Kubernetes resources. We will use the `kubernetes.helm.v3.Chart` resource, which represents a Helm chart in a Pulumi program.

The script will perform the following actions:

- Configure the Pulumi program to use the required cloud and Kubernetes providers.
- Initialize Helm chart settings.
- Deploy the Helm chart to an Oracle Kubernetes Engine (OKE) cluster.

Here's the full Pulumi TypeScript program to accomplish this:

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

// Ensure you have set up your Kubernetes provider configuration.
// In this case, the provider configuration would connect to an existing Oracle Kubernetes Engine (OKE) cluster.

// Deploy the Pritunl VPN Helm chart.
const pritunlVpnChart = new k8s.helm.v3.Chart("pritunl-vpn", {
  chart: "pritunl",
  version: "x.x.x", // Replace with the desired chart version
  fetchOpts: {
    repo: "https://helm.pritunl.com", // This is the repository hosting the Pritunl Helm chart.
  },
  // Values to pass to the Helm chart. Replace these with your specific configuration.
  values: {
    // You can set configuration values for your Pritunl chart here.
    // For example, you might want to set the `mongodb` URL if using an external database:
    // mongodb: "mongodb://username:password@host:port/database"
  },
});

// Export the Chart name
export const chartName = pritunlVpnChart.metadata.apply(meta => meta.name);

```

**Explanation:**

- We import the necessary modules from Pulumi: `@pulumi/pulumi` for core Pulumi features, and `@pulumi/kubernetes` for Kubernetes resources.
  
- Next, we create a new Helm chart resource in our cluster using `k8s.helm.v3.Chart`. We give the chart a resource name (`"pritunl-vpn"` in this case) and specify the chart details. This includes the chart name, a version number (you will need to replace `"x.x.x"` with the actual chart version you wish to deploy), and the repository URL where the Helm chart is located (for Pritunl, it's hosted at `"https://helm.pritunl.com"`).

- In the `values` section of the chart, you can specify the configuration options required by the Pritunl VPN chart. As the Helm chart options can be detailed and specific to your environment, you should refer to the official [Pritunl documentation](https://docs.pritunl.com/docs/kubernetes) for the configuration settings that apply to your deployment.

- Lastly, we export the Chart name, which could be useful for querying or updating your Helm chart deployment in the future.

**Important Notes:**
- This program assumes that you have already set up your Pulumi configuration to connect to the appropriate OKE cluster and that your `kubeconfig` is pointing to the right cluster.
- Ensure you replace the placeholder values, such as the chart version or MongoDB URL, with valid values for your deployment.

To run this Pulumi program, save the code to a `index.ts` file, then execute `pulumi up` in the same directory. Pulumi will provision the specified resources accordingly.