Deploy the tftp helm chart on Digital Ocean Kubernetes Service

Question

Pulumi · Accepted Answer

To deploy a TFTP Helm chart on the DigitalOcean Kubernetes Service using Pulumi, you would need to follow these general steps:

1. **Create a new DigitalOcean Kubernetes cluster**: Set up a managed Kubernetes cluster on DigitalOcean where you will deploy your Helm chart.

2. **Install the TFTP Helm chart**: Use Pulumi's Helm chart resource to deploy the TFTP Helm chart into the Kubernetes cluster you have set up.

To achieve this, you will need to write a Pulumi program in TypeScript. Below is a detailed explanation and the corresponding Pulumi program that you can use as a starting point.

### Explanation

1. **Kubernetes Cluster**: We leverage the `digitalocean.KubernetesCluster` resource to create a new Kubernetes cluster. This resource will handle the creation and configuration of the cluster within your DigitalOcean account. It requires essential properties like the region where the cluster will be created, the size of the droplets (virtual machines), and the number of nodes to start with.

2. **Helm Chart**: Once the cluster is available, we use the `kubernetes.helm.v3.Chart` resource to deploy the TFTP Helm chart. You need to provide details like the repository where the chart is located, the chart name, and the values you want to override in the default chart (if any).

Pulumi's TypeScript SDK handles the dependencies between resources automatically. The Helm chart will not be deployed until the Kubernetes cluster is successfully created.

Here is the TypeScript program that performs these steps:

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

// Create a DigitalOcean Kubernetes cluster.
const cluster = new digitalocean.KubernetesCluster("do-cluster", {
    region: "nyc1", // Example region, this should be updated according to your preference.
    version: "latest", // Use the latest available version of Kubernetes or specify a version.
    nodePool: {
        name: "default",
        size: "s-1vcpu-2gb", // Specify the size of the droplets.
        nodeCount: 1, // Number of nodes to start with.
    },
});

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

// Configure Kubernetes provider to connect to the new cluster.
const k8sProvider = new k8s.Provider("do-k8s-provider", {
    kubeconfig: cluster.kubeConfigs[0].rawConfig,
});

// Deploy the TFTP Helm chart into the cluster.
const tftpChart = new k8s.helm.v3.Chart("tftp-chart", {
    repo: "example", // Replace with the actual repository containing the TFTP chart.
    chart: "tftp", // The name of the chart.
    // If you have custom values, specify them as an object here.
    // values: { /* Custom TFTP Helm chart values go here */ },
}, { provider: k8sProvider });

// Export the URL (or another relevant endpoint) after fetching it from the chart's resources.
export const tftpUrl = tftpChart.getResourceProperty("v1/Service", "tftp-service", "status").apply(status => status.loadBalancer.ingress[0].ip);
```

Ensure that you replace the `repo` in the `tftpChart` with the actual repository that contains the TFTP Helm chart. Also, if there are any specific configurations required for the TFTP Helm chart, they should be passed to the `values` property in key-value pairs.

### Running the Program

Once you have this TypeScript program ready:

1. Initialize a new Pulumi project with `pulumi new typescript`.
2. Place the provided TypeScript code in the `index.ts` file that's created by the `pulumi new` command.
3. Run `pulumi up` to deploy your changes. Pulumi will perform the diff, ask for a confirmation, and provision the resources as defined.

### Conclusion

After running the above program, you will have a DigitalOcean Kubernetes cluster with the TFTP Helm chart deployed. You can check the deployment's details and statuses through either the Pulumi CLI output or by logging into your Digital Ocean cloud console.