Deploy the stakater-comment-on-pr helm chart on Digital Ocean Kubernetes Service

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Pulumi · Accepted Answer

To deploy the `stakater-comment-on-pr` Helm chart on Digital Ocean Kubernetes Service (DOKS), we'll walk through the process using Pulumi with TypeScript. This will involve a few steps:

1. **Provisioning a DOKS cluster**: We're going to use the `digitalocean.KubernetesCluster` resource to create a new Kubernetes cluster on Digital Ocean.

2. **Deploying a Helm chart**: After setting up the DOKS cluster, we'll use the `kubernetes.helm.v3.Chart` resource from the Kubernetes provider to deploy the `stakater-comment-on-pr` Helm chart to the cluster.

Here is how you can achieve this:

First, we need to import the necessary Pulumi libraries and initialize two main resources:

- `digitalocean.KubernetesCluster`: This resource creates the DOKS cluster.
- `kubernetes.helm.v3.Chart`: This resource represents a Helm chart that can be deployed onto a Kubernetes cluster.

The following TypeScript program will demonstrate this process:

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

// Initial configuration
const clusterName = "stakater-cluster";
const region = "nyc3"; // New York City 3 is just an example. Choose a region that is best for you.

// Create a Digital Ocean Kubernetes cluster
const doksCluster = new digitalocean.KubernetesCluster(clusterName, {
    region: region,
    version: "latest", // Using the 'latest' keyword to ensure we have the latest version of Kubernetes
    nodePool: {
        name: "stakater-nodepool",
        size: "s-1vcpu-2gb", // Select the Droplet size that best fits your needs
        nodeCount: 2, // The number of Droplet instances in the node pool
    },
});

// Create a provider instance for the newly created cluster
const k8sProvider = new kubernetes.Provider("k8s-provider", {
    kubeconfig: doksCluster.kubeConfigs[0].rawConfig,
});

// Deploy the stakater-comment-on-pr Helm chart
const stakaterChart = new kubernetes.helm.v3.Chart("stakater-comment-on-pr", {
    chart: "stakater-comment-on-pr", // The name of the chart
    // Specify the chart repository URL if the chart is not available in the default Helm repos
    // e.g., `repo: "https://charts.stakater.com"`,
    values: {
        // Provide configuration values for your chart here
        // e.g., `replicaCount: 2,`
    },
}, { provider: k8sProvider }); // Make sure to associate the chart with our DOKS cluster provider

// Export the cluster name and Kubeconfig
export const cluster = doksCluster.name;
export const kubeconfig = doksCluster.kubeConfigs[0].rawConfig;
```

In this Pulumi program:

- We create a Digital Ocean Kubernetes Service cluster, specifying the region, Kubernetes version, and node pool details.
- We create a Pulumi Kubernetes provider that knows how to interact with our newly created Kubernetes cluster (using the `kubeconfig` from the DOKS cluster).
- We deploy the `stakater-comment-on-pr` Helm chart using the `kubernetes.helm.v3.Chart` resource. This assumes that the chart is named `stakater-comment-on-pr` and is available in your Helm repository.
- Finally, we export the cluster name and the cluster's kubeconfig so that you can use them to interact with the cluster using `kubectl` or other Kubernetes tools.

**Note:** The provided `values` in the `stakater-comment-on-pr` chart will be the default settings unless you provide specific overrides. If your chart requires specific values or is not available in the default chart repositories, you’ll need to specify the `repo` and provide the necessary values within the `values` object accordingly.

After creating this file with your desired settings, you can deploy it with Pulumi by running the following commands in your terminal:

```bash
pulumi up
```

This command will prompt you to confirm the actions Pulumi will take to create the DOKS cluster and deploy the Helm chart. After you approve, Pulumi will provision the resources and apply the Helm chart to the cluster.