Deploy the ucloud-exporter helm chart on Digital Ocean Kubernetes Service

Question

Pulumi · Accepted Answer

To deploy the `ucloud-exporter` helm chart on the Digital Ocean Kubernetes Service using Pulumi, you would first need to create a Kubernetes cluster within Digital Ocean. Then, once the cluster is set up, you can deploy the helm chart to the newly created Kubernetes cluster.

Here's a step-by-step breakdown of what we are going to do:

1. **Set up a new Digital Ocean Kubernetes Cluster**: Using Pulumi's Digital Ocean provider, we will create a Kubernetes cluster within your Digital Ocean account.
2. **Install the ucloud-exporter Helm Chart**: After the Kubernetes cluster is provisioned, we would use the Pulumi Kubernetes provider to install the `ucloud-exporter` helm chart into the cluster.

Let's start with the Pulumi program that will set this up.

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

// Step 1: Creating a DigitalOcean Kubernetes Cluster
const cluster = new digitalocean.KubernetesCluster("do-cluster", {
    region: "nyc1", // Choose the region that is best for you
    version: "latest", // Specify the desired Kubernetes version
    nodePool: {
        name: "default-pool",
        size: "s-2vcpu-2gb", // This is the smallest size available
        nodeCount: 2, // Specify the number of nodes in the NodePool
    },
});

// Step 2: Using the resulting Kubeconfig from the cluster to create a K8s provider
const k8sProvider = new k8s.Provider("do-k8s", {
    kubeconfig: cluster.kubeConfigs[0].rawConfig,
});

// Step 3: Install ucloud-exporter using Helm Chart
const ucloudExporterChart = new k8s.helm.v3.Chart("ucloud-exporter", {
    chart: "ucloud-exporter",
    // Make sure to replace `repoURL` with the actual repository URL of the helm chart
    // and `chartVersion` with the desired version you want to install.
    fetchOpts: {
        repo: "https://helm-repo-url-here/",
    },
    version: "chartVersion",
}, { provider: k8sProvider });

// Export the cluster's kubeconfig and endpoint
export const kubeconfig = cluster.kubeConfigs[0].rawConfig;
export const clusterEndpoint = cluster.endpoint;
```

Breaking down the above program:

- **Digital Ocean Kubernetes Cluster**: The `digitalocean.KubernetesCluster` resource creates a Kubernetes cluster. This cluster is placed in the `nyc1` region with the latest Kubernetes version. It sets up a node pool with two nodes of a small size to run your workloads.
  
  - You can change the `region`, `version`, `size`, and `nodeCount` as per your need.

- **Kubernetes Provider**: The `k8s.Provider` instance is responsible for interpreting the kubeconfig and setting up communication with the Kubernetes cluster we just created. It relies on the `kubeConfigs` output of the Digital Ocean Kubernetes cluster.
  
- **Helm Chart**: Using the `k8s.helm.v3.Chart` resource, we deploy the `ucloud-exporter` helm chart to our Kubernetes cluster. Adjust the `repo` property to point to where your helm chart is hosted and specify the `version` of the chart you wish to install.

- **Exports**: Finally, we export the `kubeconfig` and `clusterEndpoint` for your use to interact with the Kubernetes cluster manually if required.

Remember to replace the placeholder `"https://helm-repo-url-here/"` with the actual URL of the helm chart repository that hosts `ucloud-exporter` and specify the `chartVersion` you want to deploy.

Make sure you have Pulumi CLI installed and configured with your Digital Ocean token before running this program. Save this TypeScript code in a file (e.g., `index.ts`), then run `pulumi up` to create and deploy your cluster and your Helm chart.

Please note that provisioning a Kubernetes cluster and deploying a chart might take some time, so be patient while Pulumi works on setting up the resources. Once done, you'll have a running instance of `ucloud-exporter` on a Digital Ocean Kubernetes cluster!