Deploy the duoauthproxy-radius-simple helm chart on Digital Ocean Kubernetes Service

Question

Pulumi · Accepted Answer

To deploy the `duoauthproxy-radius-simple` Helm chart on Digital Ocean Kubernetes Service using Pulumi, we shall take the following steps:

1. Create a Digital Ocean Kubernetes Cluster.
2. Deploy the Helm chart on the cluster.

Here is a detailed breakdown of how the Pulumi program accomplishes this:

- **Digital Ocean Kubernetes Cluster**: We create a Kubernetes cluster on Digital Ocean using the `digitalocean.KubernetesCluster` resource. We specify necessary configuration details such as the region, version, and node pool details.
  
- **Helm Chart Deployment**: Once the cluster is available, we install the Helm chart using the `kubernetes.helm.v3.Chart` resource. We'll assume that the `duoauthproxy-radius-simple` chart is available in a known Helm chart repository. In this deployment, we provide the necessary chart details, such as the name and version, or repository URL if it is not a stable chart you may get from the Helm stable repository.

Let's look at the Pulumi TypeScript code for deploying the Helm chart on Digital Ocean Kubernetes Service.

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

// Create a Digital Ocean Kubernetes cluster.
const cluster = new digitalocean.KubernetesCluster("do-cluster", {
    region: "nyc3", // For example, New York 3 region.
    version: "1.21.5-do.0", // Specify the version of Kubernetes.
    nodePool: {
        name: "default",
        size: "s-2vcpu-2gb", // Specify the size of the nodes.
        nodeCount: 2, // Number of nodes in the node pool.
    },
});

// Create a provider for the Digital Ocean Kubernetes cluster.
const k8sProvider = new k8s.Provider("do-k8s-provider", {
    kubeconfig: cluster.kubeConfigs[0].rawConfig,
});

// Deploy the duoauthproxy-radius-simple Helm chart.
const duoAuthProxyChart = new k8s.helm.v3.Chart("duoauthproxy-radius-simple", {
    chart: "duoauthproxy-radius-simple",
    // Assuming the chart is in a Helm repository, specify the repo details.
    // If it's a local chart, provide the path using `path: "./path/to/chart"`.
    fetchOpts: {
        repo: "https://helm-repo.example.com/", // Replace with your Helm repository URL.
    },
    // Define any custom values you want to provide to the Helm chart.
    values: {
        // e.g., to set a custom admin password
        // adminPassword: "verysecurepassword",
    },
}, { provider: k8sProvider });

// Export the cluster's kubeconfig.
export const kubeconfig = cluster.kubeConfigs[0].rawConfig;
```

In this program:

- We initialized a new Digital Ocean Kubernetes Cluster configured in the New York 3 region. We've created a small node pool with two nodes of a moderate size suitable for small workloads.
  
- We defined a Kubernetes provider which allows Pulumi to interact with the newly created Digital Ocean Kubernetes cluster using the generated kubeconfig.

- We deployed the `duoauthproxy-radius-simple` Helm chart using the `k8s.helm.v3.Chart` resource, pointing to the chart in a hypothetical Helm repository.

Don't forget to replace `"https://helm-repo.example.com/"` with the actual repository URL where the `duoauthproxy-radius-simple` Helm chart is hosted, and adjust the other placeholders to match your actual configuration needs.

You can run this Pulumi program using the usual Pulumi CLI commands:

```bash
pulumi up
```

This command will provision the resources as per the defined program. Please ensure you have Pulumi installed and set up with the necessary cloud provider credentials configured for Digital Ocean.