Deploy the typo3scan helm chart on Digital Ocean Kubernetes Service

Question

Pulumi · Accepted Answer

To deploy the `typo3scan` Helm chart on Digital Ocean's Kubernetes service using Pulumi, you'll need to follow these steps:

1. Set up a new Digital Ocean Kubernetes cluster or use an existing one.
2. Deploy the `typo3scan` Helm chart on the Kubernetes cluster.

For step 1, we'll create a Pulumi program that provisions a Digital Ocean Kubernetes cluster. We'll use the `digitalocean.KubernetesCluster` resource for this purpose.

For step 2, we'll use the `kubernetes.helm.sh/v3.Chart` resource from the Kubernetes provider, which allows us to specify the deployment of a Helm chart on our Kubernetes cluster.

Below is a comprehensive program that accomplishes both steps:

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

// Step 1: Create a new Digital Ocean Kubernetes cluster
const cluster = new digitalocean.KubernetesCluster('do-cluster', {
  region: 'nyc3',
  version: '1.21.5-do.0', // Use an appropriate version for your needs
  nodePool: {
    name: 'default',
    size: 's-2vcpu-2gb', // Choose the node size that suits your needs
    nodeCount: 3, // Set the number of nodes you want in your node pool
  },
});

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

// Step 2: Deploy the typo3scan Helm chart on the Digital Ocean Kubernetes cluster
const typo3scanChart = new k8s.helm.sh.v3.Chart('typo3scan', {
  chart: 'typo3scan',
  version: '1.0.0', // Replace with the actual chart version you want to deploy
  // Specify the chart repository here
  fetchOpts: {
    repo: 'https://helm-repository-url', // Replace with the actual Helm chart repository URL
  },
}, { provider: new k8s.Provider('k8s-provider', { kubeconfig }) });

// Export the Helm chart name
export const helmChartName = typo3scanChart.name;
```

### Explanation:

- We begin by importing the necessary Pulumi packages. The `@pulumi/digitalocean` package is used to interact with Digital Ocean resources, and the `@pulumi/kubernetes` package is used to deploy resources on a Kubernetes cluster.

- Then, we create a new instance of `digitalocean.KubernetesCluster`, which will be responsible for provisioning our Kubernetes cluster on Digital Ocean.

- We configure the cluster with the desired region, select the Kubernetes version compatible with the Digital Ocean Kubernetes service, define the node pool specifications such as the node size, and the number of nodes.

- We export the kubeconfig of the Kubernetes cluster as this will be used to interact with the cluster when deploying the Helm chart.

- Next, we deploy the `typo3scan` Helm chart on the Kubernetes cluster by creating an instance of `k8s.helm.sh/v3.Chart`. We need to specify the name of the chart, the desired chart version, and also the repository URL where the chart can be found. This repository URL should point to the location where the `typo3scan` Helm chart is hosted.

- We set the second argument of the `k8s.helm.sh/v3.Chart` constructor to include a custom Pulumi Kubernetes provider, which allows us to specify which kubeconfig file to use for deploying to the cluster.

- Finally, we export the name of the deployed Helm chart which may be useful for debugging, tracking, or further automation.

### Follow-up Steps:

After defining the Pulumi program:

1. Install Pulumi CLI and authenticate with Pulumi.
2. Install the necessary packages using npm or Yarn:

```bash
   npm install @pulumi/digitalocean @pulumi/kubernetes
   ```

3. After setting up Pulumi to work with your Digital Ocean account, you'll run your Pulumi program with the following commands:

```bash
   pulumi stack init dev
   pulumi up
   ```

This will prompt you to review the changes before they are applied. After confirming, Pulumi will provision the resources as defined in the program.

Remember to replace placeholder values like the Helm repository URL, the Kubernetes version, and chart version with actual values based on your needs and the available versions provided by Digital Ocean and the `typo3scan` Helm chart maintainers.

Also, consider best practices like managing sensitive data such as keys or secret configurations outside of the main code, possibly using Pulumi's configuration management system, secrets, or other configuration files.