Deploy the web-dvwa helm chart on Digital Ocean Kubernetes Service

Question

Pulumi · Accepted Answer

To deploy the `web-dvwa` Helm chart on DigitalOcean's Kubernetes Service using Pulumi, you will need to:

1. **Set up a DigitalOcean Kubernetes Cluster**: First, create a Kubernetes Cluster on DigitalOcean. To achieve this, you'll define the cluster configuration with the required node pool settings.

2. **Use Helm Chart resource for deployment**: Once the cluster is set up, you'll use Pulumi's `helm.sh/v3.Chart` resource which allows you to deploy Helm charts within a Kubernetes cluster. For the `web-dvwa` chart, you may need to add the appropriate Helm repository or specify the chart location directly if it's a custom Helm chart.

Here's a Pulumi TypeScript program that demonstrates how to accomplish this:

```typescript
import * as pulumi from "@pulumi/pulumi";
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", {
    // Define the region, version and node pool details according to your needs.
    region: "nyc1",
    version: "latest", // You can specify the exact version of Kubernetes.
    nodePool: {
        name: "default-pool",
        size: "s-1vcpu-2gb", // Choose the size that fits your workload.
        nodeCount: 2,
    },
});

// Step 2: Create a Kubernetes provider instance using the kubeconfig from the newly created cluster.
const k8sProvider = new kubernetes.Provider("do-k8s-provider", {
    kubeconfig: cluster.kubeConfigs[0].rawConfig,
});

// Step 3: Deploy the web-dvwa Helm chart into the Kubernetes cluster.
const webDvwaChart = new kubernetes.helm.v3.Chart("web-dvwa", {
    chart: "dvwa", // Assuming 'dvwa' is the chart name in the repository.
    // The repository details where the web-dvwa Helm chart is located.
    // If the chart is within a known Helm repository, you must add that repo to your Helm CLI using `helm repo add`.
    // If this is a custom chart, you may need to specify the `repo` or handle the source differently.
    fetchOpts: {
        repo: "https://charts.example.com/", // Replace with the correct chart repository.
    },
}, { provider: k8sProvider });

// Export the cluster's kubeconfig and the service endpoint of the web-dvwa if available.
export const kubeconfig = cluster.kubeConfigs[0].rawConfig;
export const webDvwaEndpoint = webDvwaChart.getResourceProperty(
    "v1/Service",
    "web-dvwa",
    "status",
).apply(status => status.loadBalancer.ingress[0]?.hostname || status.loadBalancer.ingress[0]?.ip);
```

### Explanation:

- **DigitalOcean Kubernetes Cluster**: The `digitalocean.KubernetesCluster` resource is used to allocate a managed Kubernetes cluster in DigitalOcean's environment. This includes setting up node pools that define the size and count of the Droplets (VMs) that will run your Kubernetes worker nodes.

- **Kubernetes Provider**: The `kubernetes.Provider` resource creates an instance of a Kubernetes provider which is configured to manage resources in the created cluster, using the cluster's `kubeconfig`.

- **Helm Chart**: The `kubernetes.helm.v3.Chart` resource is responsible for deploying a Helm chart into the Kubernetes cluster. It requires the chart name and repository details. You will need to replace the `chart` and `repo` fields with the correct values for the `web-dvwa` Helm chart.

- **Exports**: Pulumi exports are used to provide outputs that can be accessed after the deployment is completed. In this case, the `kubeconfig` for accessing the cluster and the endpoint of the `web-dvwa` service are exported.

Ensure you have the DigitalOcean provider configured with the required credentials and Pulumi CLI installed locally. After running this program with `pulumi up`, the web-dvwa Helm chart is expected to be deployed on your DigitalOcean Kubernetes cluster. You can use the exported `kubeconfig` to manage the cluster with `kubectl` and the `webDvwaEndpoint` to access the application once it's deployed. Please make sure to adjust the chart name and repository details as per the actual Helm chart you are intending to deploy.