Deploy the rke2-coredns helm chart on Digital Ocean Kubernetes Service

Question

Pulumi · Accepted Answer

To deploy the `rke2-coredns` Helm chart on the Digital Ocean Kubernetes Service using Pulumi, we'll follow these steps:

1. Create a new Digital Ocean Kubernetes cluster.
2. Deploy the `rke2-coredns` Helm chart to the cluster.

In Pulumi, we'll first need the `@pulumi/digitalocean` package for creating a Kubernetes cluster in Digital Ocean and the `@pulumi/kubernetes` package to deploy the Helm chart.

Here’s how you can write a Pulumi program to do this:

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

// Step 1: Create a Digital Ocean Kubernetes Cluster.
const cluster = new digitalocean.KubernetesCluster("do-cluster", {
    region: "nyc1", // Set to your preferred region
    version: "latest", // Use the latest available version
    nodePool: {
        size: "s-2vcpu-2gb", // Choose the node size that fits your needs
        name: "default-pool",
        nodeCount: 2, // Specify the number of nodes in the pool
    },
});

// Step 2: Deploy the rke2-coredns Helm chart to the cluster
// Create a provider to interact with your Kubernetes cluster
const k8sProvider = new kubernetes.Provider("k8s-provider", {
    kubeconfig: cluster.kubeConfigs[0].rawConfig,
});

// Deploy the rke2-coredns Helm chart
const helmChart = new kubernetes.helm.v3.Chart("rke2-coredns", {
    chart: "rke2-coredns",
    // You may need to specify the repository where rke2-coredns is located
    // For example:
    // repositoryOpts: { 
    //     repo: "https://helm.rancher.io/" 
    // },
    values: {
        // Provide any custom configurations you want to apply
        // For example:
        // replicaCount: 2
    },
}, { provider: k8sProvider });

// Export the cluster name and kubeconfig
export const clusterName = cluster.name;
export const kubeconfig = cluster.kubeConfigs[0].rawConfig;
```

This program performs the following actions:

- **Digital Ocean Kubernetes Cluster**: Creates a new Kubernetes cluster in your specified region with the name `do-cluster`. We're choosing a small node size for demonstration purposes, and starting with 2 nodes.
  
- **Provider Configuration**: Sets up a Pulumi Kubernetes provider to interact with your new Kubernetes cluster, using the kubeconfig that is retrieved from the Digital Ocean Kubernetes cluster.
  
- **Helm Chart**: Deploys the `rke2-coredns` Helm chart using the Pulumi Kubernetes provider. You need to specify the repository where the Helm chart is hosted. Optionally, you can provide a `values` object to override default chart values with the configurations you desire.

After setting this up, run `pulumi up` to execute it. Pulumi will provision the resources in the defined order. The process will result in your Kubernetes cluster being deployed on Digital Ocean and the `rke2-coredns` Helm chart being applied to that cluster.

Remember that before running the program with Pulumi CLI, you need to set up your Pulumi stack and authenticate with Digital Ocean so that Pulumi can create and manage resources in your DO account.

Also, replace the `chart` and `repositoryOpts` values with accurate ones for `rke2-coredns` if necessary (the given values are placeholders as I don't have access to the exact repository details).

Please notice the correct versions and settings might change based on your specific requirements and the current offerings by Digital Ocean and updates to the Helm charts you want to use. Check the official documentation of Digital Ocean[ and the Helm chart for `rke2-coredns`](https://artifacthub.io/packages/helm/rancher/rke2-coredns) for the latest information.