Deploy the discord-bot helm chart on Digital Ocean Kubernetes Service

Question

Pulumi · Accepted Answer

In order to deploy a Discord bot Helm chart on the DigitalOcean Kubernetes service using Pulumi, we need to follow a few steps:
1. Provision a new Kubernetes cluster on the DigitalOcean platform.
2. Use the Helm chart to deploy the Discord bot onto the Kubernetes cluster.

Firstly, we’ll use Pulumi's DigitalOcean provider to create the Kubernetes cluster. Then, we'll use Pulumi's Kubernetes provider to deploy the Helm chart.

Below is the Pulumi program written in TypeScript that achieves these goals:

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

// Step 1: Provision a DigitalOcean Kubernetes cluster
const cluster = new digitalocean.KubernetesCluster("do-cluster", {
    // Specify the region for the cluster
    region: "nyc3",
    // Define the version of Kubernetes to use
    version: "latest",  // or specify a certain version like "1.22.5-do.0"
    // Define the node pool configuration
    nodePool: {
        name: "default-pool",
        size: "s-1vcpu-2gb",
        nodeCount: 2, // The number of nodes in the pool
    },
});

// Step 2: Deploy the Discord bot Helm chart onto the Kubernetes cluster
const discordBotChart = new k8s.helm.v3.Chart("discord-bot", {
    chart: "discord-bot",
    // Assuming the Helm chart is available in a public repository,
    // specify the repository URL where the chart is located
    // For example:
    // repo: "https://charts.myrepo.com/", 
    values: {
        // Provide necessary discord bot configuration values here
        // Each chart has specific configuration options that need to be set
        // For example:
        // botToken: "your-discord-bot-token",
        // commandPrefix: "!",
    },
}, {
    // Inform Pulumi about the provider associated with the resources being created
    provider: new k8s.Provider("k8s-provider", {
        kubeconfig: cluster.kubeConfigs[0].rawConfig,
    }),
});

export const kubeconfig = cluster.kubeConfigs[0].rawConfig;
```

### Explanation:

- **DigitalOcean Kubernetes Cluster**: We create a new Kubernetes cluster on DigitalOcean using the `digitalocean.KubernetesCluster` resource. We name the cluster "do-cluster" and specify the region, Kubernetes version, and node pool configuration. The node pool configuration specifies the size and number of nodes you wish to have in your default node pool.

- **Kubernetes Provider**: We need to interact with the Kubernetes cluster to deploy Helm charts. Pulumi allows us to create a Kubernetes provider instance, which uses the `kubeconfig` of the cluster we've just created. This provider will be used for all subsequent Kubernetes-related resources.

- **Helm Chart for Discord Bot**: We deploy the Discord bot Helm chart using the `k8s.helm.v3.Chart` resource. The `chart` argument specifies the name of the Helm chart as "discord-bot", and `values` are the configuration options required by the chart. Charts typically have various customizable values such as the bot token and command prefix. The repo URL should point to the repository where your desired chart exists. If your Helm chart needs additional information or if you are hosting it on your own Helm repository, make sure to include the appropriate `repo` property.

- **Exports**: Finally, we export the raw `kubeconfig` as an output from the Pulumi program. This allows you to access the Kubernetes cluster directly using kubectl or other Kubernetes tools.

### Notes:

1. Make sure you've logged into Pulumi and have set up the DigitalOcean provider.
2. Replace placeholders within `values` with the actual configuration required by the Discord bot Helm chart.
3. Ensure you have the correct access rights to deploy resources on DigitalOcean and the necessary access to the Helm chart repository.
4. This program assumes you are using your own Helm chart for the Discord bot. If you use a public or community Helm chart, make sure to find its documentation and adjust the `repo` and `values` fields accordingly.
5. The `version` of Kubernetes is set to `latest`, which tells DigitalOcean to pick the most recent version available. Specific versions can be provided if needed.

When executed, this program will create a Kubernetes cluster and deploy the Discord bot Helm chart to that cluster. Afterward, you can interact with the Kubernetes cluster using the provided kubeconfig file.