Deploy the kraken helm chart on Digital Ocean Kubernetes Service

Question

Pulumi · Accepted Answer

To deploy the Kraken Helm chart on the DigitalOcean Kubernetes Service (DOKS), we will perform a series of steps using Pulumi with TypeScript as our language choice. I will guide you through the steps and explain the code and the resources involved.

The process can be broken down into the following steps:

1. Provision a DigitalOcean Kubernetes cluster.
2. Deploy a Helm chart for Kraken onto the cluster.

To begin, we will provision a new Kubernetes cluster on DigitalOcean using Pulumi's `digitalocean` package. The `KubernetesCluster` resource is responsible for creating and configuring the cluster on DigitalOcean. Once we have our cluster up and running, we'll deploy the Kraken Helm chart using Pulumi's `kubernetes` package, which allows us to deploy Helm charts on Kubernetes clusters.

Here is the TypeScript program that performs both steps:

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

// Step 1: Create a new DigitalOcean Kubernetes cluster
const cluster = new digitalocean.KubernetesCluster("do-cluster", {
    region: "nyc1", // Replace with your preferred region
    version: "latest", // Use the latest available version
    nodePool: {
        name: "default",
        size: "s-2vcpu-2gb", // Choose the size that fits your needs
        nodeCount: 2, // Specify the number of nodes you want
    },
});

// Step 2: Deploy the Kraken Helm chart onto the cluster
// First, we need to create a Kubernetes provider instance configured to the newly created cluster.
const k8sProvider = new k8s.Provider("k8s-provider", {
    kubeconfig: cluster.kubeConfigs[0].rawConfig,
});

// Use the Helm chart resource from the Pulumi Kubernetes provider to deploy Kraken
const krakenChart = new k8s.helm.v3.Chart("kraken", {
    chart: "kraken", // Name of the chart
    version: "0.1.0", // Specify the version of the chart
    fetchOpts: {
        repo: "https://charts.example.com/", // Replace with the Helm repository URL containing the Kraken chart
    },
}, { provider: k8sProvider });

// Export the cluster's kubeconfig and the service endpoint of the Kraken release
export const kubeconfig = cluster.kubeConfigs[0].rawConfig;
export const krakenServiceEndpoint = krakenChart.getResourceProperty("v1/Service", "kraken", "status");
```

In this program:

- We create a DigitalOcean Kubernetes cluster with a name `do-cluster`. You can customize the `region`, `version`, `size`, and `nodeCount` based on your preferences and requirements.
- The `KubernetesCluster` resource automatically generates a kubeconfig which we can use to interact with the cluster.
- We define a `k8s.Provider`, which is the Pulumi Kubernetes provider, to interact with our Kubernetes cluster using the aforementioned kubeconfig.
- We deploy the Kraken Helm chart using the `Chart` resource of the `k8s.helm.v3` module in Pulumi. We specify the chart name (`kraken`), the chart version, and the repository where the chart is located. Ensure you replace `https://charts.example.com/` with the actual repository URL.

Finally, we export the kubeconfig and the service endpoint to connect and interact with the deployed Kraken application.

Before running this code, ensure you have set up Pulumi, have the Pulumi CLI installed, and the DigitalOcean access token configured in Pulumi.

Once you've confirmed that everything is properly set up, you can run this Pulumi program with the Pulumi CLI commands:
- `pulumi up` to create or update resources
- `pulumi destroy` to clean up all resources
- `pulumi stack output` to see the exported outputs (like the kubeconfig and service endpoint)