Deploy the technitium helm chart on Digital Ocean Kubernetes Service

Question

Pulumi · Accepted Answer

To deploy the Technitium helm chart on the DigitalOcean Kubernetes Service using Pulumi, we will need to follow these steps:

1. Set up a new Kubernetes cluster on DigitalOcean.
2. Install the Helm chart into the Kubernetes cluster.

This involves creating a Pulumi program that uses two Pulumi resources:

- `digitalocean.KubernetesCluster`: This resource sets up a new Kubernetes cluster in your DigitalOcean account.
- `kubernetes.helm.sh/v3.Chart`: This resource represents a Helm chart that we will deploy into the Kubernetes cluster.

Let's start by creating a new TypeScript Pulumi program to accomplish this. We will use the `digitalocean` and `kubernetes` Pulumi providers.

First, make sure you have Pulumi installed and your DigitalOcean token is configured as a [Pulumi secret](https://www.pulumi.com/docs/intro/concepts/config/). This token is required for Pulumi to authenticate with your DigitalOcean account.

Below is the Pulumi program that sets up the DigitalOcean Kubernetes cluster and deploys the Technitium Helm chart to it:

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

// This is your desired configuration.
const name = 'technitium-cluster';
const region = 'nyc3'; // Choose the region that is closest to you.
const nodeSize = 's-2vcpu-4gb'; // Change the size according to your needs.

// Create a DigitalOcean Kubernetes cluster.
const cluster = new digitalocean.KubernetesCluster(name, {
    region: region,
    version: 'latest',
    nodePool: {
        name: 'default',
        size: nodeSize,
        nodeCount: 2, // Change the count according to your needs.
    },
});

// Setup the Kubernetes provider to use the cluster created above.
const kubernetesProvider = new k8s.Provider('do-k8s', {
    kubeconfig: cluster.kubeConfigs[0].rawConfig,
});

// Deploy the Technitium Helm chart.
const technitium = new k8s.helm.v3.Chart('technitium', {
    chart: 'technitium',
    // Technitium might be found in a custom repository. Add it if necessary.
    // repo: 'http://charts.example.com/',
    // You can pass custom values or use the default ones provided by the Technitium chart.
    // values: { /* your custom values here */ },
}, { provider: kubernetesProvider });

// Export the cluster's kubeconfig and Technitium endpoint.
export const kubeconfig = cluster.kubeConfigs[0].rawConfig;
export const technitiumEndpoint = technitium.getResourceProperty('v1/Service', 'technitium', 'status');
```

Here's an explanation of what each section of the program does:

- The `digitalocean.KubernetesCluster` resource creates a new Kubernetes cluster with the specified name, region, and node size in your DigitalOcean account.
- The `kubernetesProvider` sets up the Kubernetes provider, configuring it to communicate with the newly created DigitalOcean Kubernetes cluster. This uses the kubeconfig provided by DigitalOcean once the cluster is available.
- The `k8s.helm.v3.Chart` resource represents the Technitium Helm chart that we wish to install. We specify the name of the chart and optionally define the repository if it's not a part of the default Helm chart repositories.
- `export` statements at the end will output the kubeconfig file for the cluster, which you could use with `kubectl` to interact with your cluster, and the endpoint through which Technitium will be accessible after deployment.

Remember to replace the placeholder values with actual configuration values that are appropriate for your use case, such as the `nodeSize` or any custom `values` for the Technitium Helm chart, if necessary.

Save this code into a file named `index.ts`. To run this code, execute the following commands:

```bash
pulumi stack init technitium-on-doks
pulumi up
```

This will provision the resources, and once the deployment is successful, Pulumi will output the kubeconfig and Technitium endpoint.

Keep in mind that Helm charts sometimes depend on a specific namespace being present in the cluster or have other prerequisites outlined in the chart's documentation. Be sure to read the chart's documentation and add any missing pieces to your Pulumi program.