Deploy the cloudflare helm chart on Oracle Kubernetes Engine (OKE)

Question

Pulumi · Accepted Answer

To deploy a Helm chart on Oracle Kubernetes Engine (OKE) using Pulumi, you will use a combination of resources from the Pulumi Kubernetes and OCI (Oracle Cloud Infrastructure) provider.

Here's a step-by-step breakdown of the process:
1. Set up an Oracle Kubernetes Engine (OKE) cluster.
2. Install the Helm chart on the cluster.

We will first need to define the necessary resources for our OKE cluster. If you've already provisioned an OKE cluster, you can skip this part and configure Pulumi to use your existing cluster.

Next, we will use the `kubernetes.helm.v3.Chart` resource from the Pulumi Kubernetes provider to deploy the Cloudflare Helm chart onto the OKE cluster. Helm charts are packages for Kubernetes resources and using Helm charts through Pulumi allows you to manage your Kubernetes applications along with their dependencies in one place.

Below is the Pulumi TypeScript program that outlines these steps:

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

// Replace these values with the appropriate information for your OCI configuration.
const compartmentId = "YOUR_OCI_COMPARTMENT_ID";

// Step 1: Define the Oracle Kubernetes Engine Cluster.
// The following is a basic example of how to define an OKE cluster.
// In practice, you may need additional configuration based on your specific requirements.

const okeCluster = new oci.containerengine.Cluster("okeCluster", {
    compartmentId: compartmentId,
    kubernetesVersion: "v1.20.11", // Use the version that suits your needs
    options: {
        serviceLbSubnetIds: ["YOUR_SUBNET_ID_ONE", "YOUR_SUBNET_ID_TWO"],
    },
    // ...additional configuration settings such as VCN, Node Pool setup, etc.
});

// Step 2: Deploy Cloudflare Helm Chart using the `kubernetes.helm.v3.Chart` resource.
// Normally, you'll setup a kubeconfig file that Pulumi can use to interact with your K8s cluster.
// This file may already exist if you have configured `kubectl` to interact with your OKE cluster.

const kubeConfig = okeCluster.kubeConfig.rawConfig.apply(JSON.stringify);
const provider = new k8s.Provider("k8sProvider", {
    kubeconfig: kubeConfig,
});

const cloudflareHelmChart = new k8s.helm.v3.Chart("cloudflare", {
    chart: "cloudflare",
    // Specify the Helm chart repository here
    // For example: repo: "https://charts.cloudflare.com/"
    // Ensure that you have access to the Cloudflare Helm chart repository and the repo URL is correct.
    // The `values` object is where you can set configuration settings for your deployment
    values: {
        // Placeholder for Cloudflare specific configurations
        // You'll specify settings such as API tokens, configuration options, etc.
    },
}, { provider: provider });

export const clusterName = okeCluster.name;
export const cloudflareChartVersion = cloudflareHelmChart.version;

```

Make sure to replace placeholders such as `YOUR_OCI_COMPARTMENT_ID`, `YOUR_SUBNET_ID_ONE`, `YOUR_SUBNET_ID_TWO` with the actual IDs from your Oracle Cloud Infrastructure setup. The `kubeConfig` and the `k8s.Provider` instance enable the Kubernetes provider to interact with your cluster.

If you have an existing OKE cluster and kubeconfig file, you can simply provide your kubeconfig to the `k8s.Provider` and start from Step 2.

Additionally, you might want to configure specific values for the Cloudflare Helm chart. You can do this in the `values` object passed to the `Chart` resource. These values will depend on the settings required by the Cloudflare Helm chart for proper configuration.

Once you've created this Pulumi program, you can create, update, and manage your Cloudflare deployment directly through Pulumi's CLI. Here's a brief explanation on how you'd run your Pulumi program:

1. Initialize a new Pulumi project: `pulumi new typescript`.
2. Place the code above in the `index.ts` file in your Pulumi project.
3. Install the required npm packages:
    - `npm install @pulumi/pulumi @pulumi/oci @pulumi/kubernetes`.

After setting up your project with the correct OCI credentials and ensuring your `kubeconfig` is properly configured, you would then execute your Pulumi program with the following commands:

- `pulumi up` - This command creates or updates your resources according to the Pulumi program.
- `pulumi stack output` - After running `pulumi up`, you can use this command to view the outputs, like the cluster name and Helm chart version.
- `pulumi destroy` - If you need to tear down the resources created by the Pulumi program, this command does that for you.

Remember to review the output of `pulumi up` carefully before confirming changes. It will provide details on what resources will be created, updated, or deleted.