Deploy the free5gc helm chart on Digital Ocean Kubernetes Service

Question

Pulumi · Accepted Answer

To deploy the `free5gc` Helm chart on DigitalOcean Kubernetes Service (DOKS), we first need to create an instance of the Kubernetes cluster managed by DigitalOcean. Once we have the cluster, we can deploy the `free5gc` Helm chart to the Kubernetes cluster.

In this Pulumi program, we will follow these steps:
1. Set up a new Kubernetes cluster on DigitalOcean using the `digitalocean.KubernetesCluster` resource.
2. Configure the Kubernetes provider to use the created cluster's kubeconfig for deploying the Helm chart.
3. Use the `kubernetes.helm.v3.Chart` resource to deploy `free5gc` from its Helm chart to the Kubernetes cluster.

Let's start with the Pulumi program written in TypeScript. Make sure you have Pulumi installed and configured with DigitalOcean access credentials.

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

// Step 1: Create a DigitalOcean Kubernetes Cluster
const cluster = new digitalocean.KubernetesCluster('do-cluster', {
    region: 'nyc1',
    version: '1.21.5-do.0',
    nodePool: {
        name: 'default',
        size: 's-2vcpu-2gb',
        nodeCount: 3,
    },
});

// Step 2: Configure a provider to use the created cluster's kubeconfig
const k8sProvider = new kubernetes.Provider('k8s-provider', {
    kubeconfig: cluster.kubeConfigs[0].rawConfig,
});

// Step 3: Deploy the free5gc Helm chart
const chart = new kubernetes.helm.v3.Chart('free5gc-chart', {
    chart: 'free5gc',
    // Assuming the Helm Chart from a known repository url:
    // e.g., https://helm.free5gc.org/
    // It's important to confirm the actual chart name and repository
    fetchOpts: {
        repo: 'https://helm.free5gc.org/',
    },
    // Set helm chart values here if needed
    values: {
        serviceType: 'LoadBalancer',
    },
}, { provider: k8sProvider });

// Export the cluster's kubeconfig and the Helm chart's status
export const kubeconfig = cluster.kubeConfigs[0].rawConfig;
export const chartStatus = chart.status;

```

### Explanation:

- **Step 1: Create a DigitalOcean Kubernetes Cluster**: This defines a new Kubernetes cluster on DigitalOcean with the specified region, version, and node pool configuration.

- **Step 2: Configure a Provider**: This step configures the Kubernetes provider to interact with the newly created DigitalOcean cluster. It utilizes the `kubeconfig` obtained from the cluster to authenticate.

- **Step 3: Deploy the free5gc Helm Chart**: This step deploys `free5gc` using its Helm chart. It uses the repository where the Helm chart is located (you must replace with the correct repository URL), and you can also specify Helm chart values to customize the deployment.

### Important:
- The `region`, `version`, and `nodePool` configuration should be adjusted as per your specific requirements and DigitalOcean's available options.
- Confirm the name of the `free5gc` Helm chart and its repository URL. In this example, we used placeholder names.
- You can customize the `values` field of the `Chart` resource to include any configurations that are specific to `free5gc` and your use case.
- The exported `kubeconfig` will be used to access the cluster with `kubectl` or other Kubernetes tools.
- The `chartStatus` export can give you the deployment status information which can be useful for programmatic validation or logging.

To deploy your infrastructure, you must execute this program using the following Pulumi CLI commands:

```sh
pulumi up              # Preview and deploy changes
pulumi stack output    # View stack outputs
pulumi destroy         # Destroy the resources
```

Remember to review the Helm chart's documentation for any specific configuration options required for `free5gc`.