Deploy the omec-user-plane helm chart on Digital Ocean Kubernetes Service

Question

Pulumi · Accepted Answer

Deploying the `omec-user-plane` Helm chart on Digital Ocean's Kubernetes Service involves several steps using Pulumi's infrastructure as code approach. We will break down this deployment into clear steps, explaining what each section of the Pulumi program does.

1. **Create a Digital Ocean Kubernetes cluster**: We use the `digitalocean.KubernetesCluster` resource to create a new Kubernetes cluster. The cluster is where our Helm chart will be deployed.

2. **Deploy the Helm Chart**: Once the Kubernetes cluster is ready, we use `kubernetes.helm.v3.Chart` to deploy the `omec-user-plane` Helm chart to our Kubernetes cluster. The Chart resource allows us to specify the chart name, version, and any custom values required for our deployment.

The Helm Chart deployment will need to wait until the Kubernetes cluster is available. Pulumi takes care of this by understanding the dependencies between resources.

Here's a TypeScript Pulumi program that deploys `omec-user-plane` Helm chart on a DigitalOcean Kubernetes Cluster:

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

// Initialize a Pulumi project using DigitalOcean as the provider.
const projectName = 'do-k8s';

// Step 1: Create a new DigitalOcean Kubernetes cluster
const cluster = new digitalocean.KubernetesCluster(`${projectName}-cluster`, {
    region: 'nyc3', // Choose a region near you
    version: 'latest', // Specify the Kubernetes version or use 'latest'
    nodePool: {
        name: 'worker-pool',
        size: 's-2vcpu-2gb', // Choose the size that suits your need
        nodeCount: 2, // Specify the number of nodes in the node pool
    },
});

// Step 2: Deploy the omec-user-plane Helm chart to the DigitalOcean Kubernetes cluster

// We must first create a Kubernetes Provider that uses the kubeconfig from the newly created DigitalOcean cluster
const k8sProvider = new kubernetes.Provider(`${projectName}-k8s`, {
    kubeconfig: cluster.kubeConfigs.apply(kubeConfig => kubeConfig[0].rawConfig),
});

// Then, we can deploy the omec-user-plane Helm chart
const omecUserPlaneChart = new kubernetes.helm.v3.Chart('omec-user-plane-chart', {
    chart: 'omec-user-plane', // The name of the chart
    version: '1.0.0', // Use the specific chart version you need to deploy
    // Assuming the chart is available in a public Helm repository, specify that repository.
    // Otherwise, you'll need to setup a repo or pass in a local chart path.
    fetchOpts: {
        repo: "http://omec-helm-repo-url/", // Replace with the Helm repository URL that contains the omec-user-plane chart
    },
}, { provider: k8sProvider });

// Export the cluster's kubeconfig and endpoint to give users access to their cluster
export const kubeconfig = cluster.kubeConfigs.apply(kubeConfig => kubeConfig[0].rawConfig);
export const endpoint = cluster.endpoint;

```

In this program:

- We import the required Pulumi packages for DigitalOcean and Kubernetes.
- We define a new DigitalOcean Kubernetes cluster resource with a specific region, Kubernetes version, and node pool configuration. Adjust the node size and count according to your needs. The cluster name is suffixed with `-cluster`.
- We create a Kubernetes provider using the kubeconfig of the newly created DigitalOcean Kubernetes cluster.
- We deploy the `omec-user-plane` Helm chart using the `kubernetes.helm.v3.Chart` resource. You need to provide the correct Helm chart name, version, and repository where the chart exists. In the `fetchOpts`, replace `"http://omec-helm-repo-url/"` with the actual URL of the Helm repository hosting the `omec-user-plane` chart.
- We export the kubeconfig and the endpoint so you can access your cluster using `kubectl` or other Kubernetes tooling.

Before running this Pulumi program, ensure you have set up your Pulumi and DigitalOcean credentials. You can authenticate to DigitalOcean using a token set in the environment variable `DIGITALOCEAN_TOKEN`. Also, make sure to replace `"http://omec-helm-repo-url/"` with your actual Helm repository URL that hosts the omec-user-plane chart.

To apply this Pulumi program, navigate to your project directory in your terminal and execute `pulumi up`. Pulumi will then preview the changes and, upon confirmation, perform the deployment.