Deploy the shoot-networking-problemdetector helm chart on Digital Ocean Kubernetes Service

Question

Pulumi · Accepted Answer

To deploy the `shoot-networking-problemdetector` Helm chart on DigitalOcean Kubernetes Service (DOKS), we need to complete a few steps:

1. Create a new Kubernetes cluster on DigitalOcean, if one does not already exist.
2. After the cluster is provisioned and running, deploy the Helm chart to the cluster.

To automate these steps with Pulumi in TypeScript, we will use the `digitalocean` and `kubernetes` packages.

Here's what we will achieve with this Pulumi program:

- Provision a DigitalOcean Kubernetes (DOKS) cluster.
- Use the `kubernetes` package to apply the Helm chart to the DOKS cluster.

Let's start with the program. For educational purposes, we'll break the process down with extensive comments explaining each step.

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

// Step 1: Create a DigitalOcean Kubernetes cluster
const cluster = new digitalocean.KubernetesCluster("do-cluster", {
    region: "nyc1", // Select your preferred region
    version: "latest", // Use the latest version of Kubernetes
    nodePool: {
        size: "s-1vcpu-2gb", // Choose the node size that meets your requirements and budget
        name: "default-pool",
        nodeCount: 2, // Specify the number of nodes in the node pool
    },
});

// Step 2: Configure the Kubernetes provider to use the created cluster's kubeconfig
const k8sProvider = new kubernetes.Provider("k8s-provider", {
    kubeconfig: cluster.kubeConfigs[0].rawConfig,
});

// Step 3: Deploy the shoot-networking-problemdetector Helm chart
const problemdetectorChart = new kubernetes.helm.v3.Chart("problemdetector", {
    chart: "shoot-networking-problemdetector",
    // Add the Helm repository URL that hosts the shoot-networking-problemdetector
    // If the chart is in a public repository, you might need to specify the repository.
    // For example:
    // fetchOpts: {
    //     repo: "https://example.com/helm-charts",
    // },
    // If the Chart requires custom values, specify them using the 'values' property
    // values: {
    //     key: "value",
    // },
}, { provider: k8sProvider }); // Ensure you use the provider associated with the DOKS cluster

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

This Pulumi program does the following:

- It first defines a new DOKS cluster with a specific node size and an initial number of two nodes. Feel free to adjust these parameters based on your needs and the resources required by your Helm chart.
- Next, it sets up a Kubernetes provider that allows Pulumi to interact with our newly created cluster by supplying it with the cluster's kubeconfig.
- It then declares a Helm chart resource using the `kubernetes.helm.v3.Chart` class, pointing to the `shoot-networking-problemdetector` Helm chart.
- Lastly, it exports the `kubeconfig` and cluster `endpoint` which you can use to interact with the cluster outside of Pulumi (e.g., using `kubectl`).

Make sure to replace `"https://example.com/helm-charts"` with the actual URL of the Helm repository that hosts the `shoot-networking-problemdetector` chart, if it's not a part of the default repositories.

Once you apply this program with Pulumi, it will create all the necessary resources on DigitalOcean and deploy the Helm chart on the cluster. You can run this Pulumi program with the `pulumi up` command, and it will perform the declared actions.