Deploy the webapp-chart helm chart on Digital Ocean Kubernetes Service

Question

Pulumi · Accepted Answer

To deploy a Helm chart on the Digital Ocean Kubernetes Service (DOKS) using Pulumi, you will have to follow these steps:

1. **Set up the Digital Ocean Kubernetes Cluster**: First, you need a Kubernetes cluster on Digital Ocean where your Helm chart will be deployed. Using Pulumi's `digitalocean.KubernetesCluster` resource, you can provision a new cluster.
   
2. **Deploy the Helm chart**: Once the cluster is set up and configured, you can deploy Helm charts with Pulumi's `kubernetes.helm.v3.Chart` resource, which represents a Helm chart in a Pulumi program. You will need to provide the chart name and other optional parameters such as values overrides.

Here's a Pulumi program that performs both steps using TypeScript:

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

// Step 1: Create a Digital Ocean Kubernetes Cluster
const cluster = new digitalocean.KubernetesCluster("do-cluster", {
    region: digitalocean.Regions.NYC1,
    version: "1.21.5-do.0",
    nodePool: {
        name: "default",
        size: digitalocean.DropletSlugs.DOKS_2vCPU_2GB,
        nodeCount: 2,
    },
});

// Step 2: Deploy a Helm chart to the Digital Ocean Kubernetes Cluster
const helmChart = new k8s.helm.v3.Chart("webapp-chart", {
    chart: "webapp",
    version: "1.0.0", // specify the version of the chart
    fetchOpts: {
        repo: "http://charts.example.com/", // replace with the correct Helm chart repository
    },
}, { provider: new k8s.Provider("k8s-provider", { kubeconfig: cluster.kubeConfigs[0].rawConfig }) });

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

```

In this program:

- We create a new Kubernetes cluster in the Digital Ocean NYC1 region using the `digitalocean.KubernetesCluster` resource. The cluster will consist of 2 nodes with 2 vCPUs and 2GB of RAM each.

- We deploy the Helm chart using the `k8s.helm.v3.Chart` resource. We specify the chart name `webapp`, which should be changed to match the name of your actual Helm chart. The `version` property is the version number of the Helm chart you wish to install, and under `fetchOpts`, you specify the repository where your Helm chart is located.

- We create a new Kubernetes provider associated with our Digital Ocean Kubernetes Cluster and pass its kubeconfig to the Helm chart.

- Lastly, we export the raw kubeconfig of the Digital Ocean cluster and the status of the Helm chart deployment. These exports provide you with the information needed to manage your Kubernetes cluster and Helm chart after deployment.

Please ensure that you adjust the `chart`, `version`, and `fetchOpts.repo` fields to point to the actual Helm chart you wish to deploy. You will also need to have Pulumi and the required cloud provider CLI set up and authenticated on your local machine to run this program successfully.