Deploy the witcom-zim helm chart on Digital Ocean Kubernetes Service

Question

Pulumi · Accepted Answer

To deploy the `witcom-zim` Helm chart on Digital Ocean Kubernetes Service (DOKS), you'll need to perform a series of steps:

1. **Create a Kubernetes Cluster** on Digital Ocean:
   This involves provisioning a DOKS cluster with the desired specifications (e.g., number of nodes, size, and region).

2. **Deploy the Helm Chart**:
   Once the cluster is available, you'll use Helm to deploy the `witcom-zim` chart to your cluster. Assuming you have the Helm chart details like repository URL and any specific chart values, you'll apply them accordingly.

Let's proceed with the implementation using Pulumi in TypeScript:

### Pulumi Program to Deploy Helm Chart on DOKS:

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

// Step 1: Provision the Digital Ocean Kubernetes Service Cluster
const cluster = new digitalocean.KubernetesCluster('do-cluster', {
  region: 'nyc1', // Replace with your desired region
  version: 'latest', // Specify the version if needed, or use 'latest'
  nodePool: {
    size: 's-2vcpu-2gb', // Replace with the size you need
    name: 'default-pool',
    nodeCount: 2, // Specify the number of nodes
  },
});

// Step 2: Deploy the 'witcom-zim' Helm chart on the provisioned DOKS cluster
// We need to use the kubeconfig to connect with our Kubernetes cluster
const kubeconfig = cluster.kubeConfigs[0].rawConfig;

// Create a Kubernetes Provider instance with the kubeconfig from the DOKS cluster
const k8sProvider = new kubernetes.Provider('k8s-provider', {
  kubeconfig: kubeconfig,
});

// Deploy the Helm chart using the kubernetes.helm.v3.Chart resource
const helmChart = new kubernetes.helm.v3.Chart('witcom-zim-chart', {
  chart: 'witcom-zim',
  // Assuming 'witcom-zim' is available in a public Helm chart repository
  // or specify `repo` attribute if it's in a private/custom repository.
  values: {
    // Specify any custom values needed for 'witcom-zim' Helm chart
    // e.g., imageTag: "latest", serviceType: "LoadBalancer"
  },
}, { provider: k8sProvider });

// Export the cluster name and the public service endpoint URL of 'witcom-zim', if available
export const clusterName = cluster.name;
export const witcomZimServiceEndpoint = pulumi.interpolate`http://${helmChart.getResource('v1/Service', 'witcom-zim').status.loadBalancer.ingress[0].hostname}`;
```

### Explanation:

- **Cluster Creation**: The `digitalocean.KubernetesCluster` resource defines the cluster specifications. [`KubernetesCluster`](https://www.pulumi.com/registry/packages/digitalocean/api-docs/kubernetescluster/) includes properties for the region, Kubernetes version, and the node pool configuration.

- **Helm Chart Deployment**: We use the `kubernetes.helm.v3.Chart` resource to deploy the `witcom-zim` Helm chart. The `kubeconfig` created by the DigitalOcean Kubernetes cluster is used by the Pulumi Kubernetes Provider to manage resources on the Kubernetes cluster. Check out the [`Chart`](https://www.pulumi.com/registry/packages/kubernetes/api-docs/helm/v3/chart/) docs for more details on chart deployment.

- **Exposing Services**: If the Helm chart contains a `Service` of type `LoadBalancer`, the public endpoint will be made available and exported.

Remember to replace placeholder values with your actual data. For example, specify your desired Digital Ocean region, the Helm chart repo if it's hosted in a private repository, and any values that the Helm chart requires to tailor the deployment to your needs.