Deploy the zetcd helm chart on Digital Ocean Kubernetes Service

Question

Pulumi · Accepted Answer

To deploy the `zetcd` Helm chart on Digital Ocean Kubernetes Service using Pulumi, you need to perform the following steps:

1. Set up a new Pulumi project and configure it to use TypeScript.
2. Install the necessary Pulumi packages for Digital Ocean and Kubernetes.
3. Create a new Kubernetes cluster on Digital Ocean.
4. Define the configuration for the Helm chart deployment.
5. Deploy the `zetcd` Helm chart to the cluster.
6. Export any necessary stack outputs, such as the Kubernetes cluster endpoint.

The following program is structured to guide you through this process. It uses the `@pulumi/digitalocean` package to create a Kubernetes cluster and the `@pulumi/kubernetes` package to deploy the Helm chart.

Please make sure that you have Pulumi installed and configured with your Digital Ocean token.

Now, let's go through the Pulumi TypeScript program:

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

// Step 1: Create a new Kubernetes cluster on Digital Ocean
const cluster = new digitalocean.KubernetesCluster("zetcd-cluster", {
    region: digitalocean.Regions.NYC1,
    version: "latest",
    nodePool: {
        name: "worker-pool",
        size: digitalocean.DropletSlugs.DropletS2VCPU2GB,
        nodeCount: 2,
    },
});

// Step 2: Use the kubeconfig from the created Kubernetes cluster to interact with it
const kubeconfig = cluster.kubeConfigs[0].rawConfig;

// Step 3: Create a provider to deploy the Helm chart
const k8sProvider = new kubernetes.Provider("k8s-provider", {
    kubeconfig: kubeconfig,
});

// Step 4: Deploy the zetcd Helm chart
const zetcdChart = new kubernetes.helm.v3.Chart("zetcd", {
    chart: "zetcd",
    version: "0.1.0", // Specify the chart version you want to deploy
    fetchOpts: {
        repo: "http://helm-repo.url", // Specify the repository URL where the chart can be found
    },
}, { provider: k8sProvider });

// Export the cluster's kubeconfig and endpoint
export const kubeconfigOutput = kubeconfig;
export const clusterEndpoint = cluster.endpoint;
```

### Explanation:

1. **Kubernetes Cluster Creation:**
   The `digitalocean.KubernetesCluster` resource is used to create a new Kubernetes cluster on Digital Ocean. We specified the region, the Kubernetes version with `version: "latest"`, and the details of the node pool containing two nodes of the specified droplet size.
   
2. **Kubeconfig:**
   `kubeconfig` is the configuration required to connect to your Digital Ocean Kubernetes cluster using `kubectl` or any Kubernetes client.
   
3. **Kubernetes Provider:**
   The `kubernetes.Provider` resource manages the Kubernetes configuration. This tells Pulumi to use the kubeconfig from the created Digital Ocean Kubernetes cluster when deploying resources to it.
   
4. **Helm Chart Deployment:**
   The `kubernetes.helm.v3.Chart` resource represents a Helm chart. In this case, we are deploying the "zetcd" Helm chart. We need to specify the version of the chart and the repository where the chart is located. Since we don't have actual details for `zetcd`, you should replace `"http://helm-repo.url"` with the actual repository URL of the zetcd Helm chart.
   
5. **Stack Outputs:**
   The program exports the kubeconfig and the endpoint of the Kubernetes cluster which can be used to access your Kubernetes cluster.

Before running this program, you need to replace `"http://helm-repo.url"` with the actual repository URL for the `zetcd` Helm chart. Once your code is ready, you can deploy your infrastructure using the Pulumi CLI with `pulumi up`.

This program will create a new Kubernetes cluster in the specified Digital Ocean region, and it will deploy the `zetcd` Helm chart into that cluster.