Deploy the service-mesh-operator helm chart on Digital Ocean Kubernetes Service

Question

Pulumi · Accepted Answer

To deploy the `service-mesh-operator` Helm chart on DigitalOcean Kubernetes Service, you'll need to take the following steps within a Pulumi program:

1. **Set up a DigitalOcean Kubernetes Cluster**: You will create a DigitalOcean Kubernetes cluster where your service mesh operator will be deployed.
   
2. **Deploy the Helm Chart**: Once you have your Kubernetes cluster set up, you'll use Pulumi's Helm chart support to deploy the `service-mesh-operator`.

Below is a detailed Pulumi program written in TypeScript that accomplishes these two steps. I will guide you through the necessary Pulumi resources and explain why they are used.

### Pulumi Program for Deploying Helm Chart on DigitalOcean

First, make sure you have Pulumi installed and have authenticated with DigitalOcean's API. You will also need to have `kubectl` installed to interact with the cluster.

```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',
  version: '1.21.5-do.0',
  nodePool: {
    name: 'default-pool',
    size: 's-1vcpu-2gb', // Choose the size that is appropriate for your workload
    nodeCount: 2,        // You can specify the number of nodes here
  },
});

// Once the cluster is created, we can create a Kubernetes Provider that uses the kubeconfig from our new cluster 
const k8sProvider = new k8s.Provider('do-k8s-provider', {
  kubeconfig: cluster.kubeConfigs[0].rawConfig,
});

// Now, deploy the service-mesh-operator Helm chart using the Kubernetes provider
const serviceMeshOperatorChart = new k8s.helm.v3.Chart('service-mesh-operator', {
  chart: 'service-mesh-operator',
  // Specify the Helm repository URL if the chart is not in the default repo
  fetchOpts: {
    repo: 'https://helmrepo.example.com/', // Replace with the actual Helm repo URL
  },
  // Values to pass to the Helm chart
  values: {
    // ... Add necessary custom values for your service mesh operator
  },
}, { provider: k8sProvider });

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

```

**Explanation**:

- **DigitalOcean Kubernetes Cluster**: `digitalocean.KubernetesCluster` is a resource that provisions a new cluster on DigitalOcean. We define a node pool with a specific Droplet size suitable for our workload and the number of nodes we want in our cluster.

- **Kubernetes Provider**: The `k8s.Provider` represents a specific Kubernetes cluster where Helm charts and other Kubernetes resources can be deployed. It uses the kubeconfig of the cluster we just provisioned to interact with it.

- **Service Mesh Operator Helm Chart**: The `k8s.helm.v3.Chart` resource is used to deploy Helm charts. Here we are deploying the `service-mesh-operator` chart from a specified Helm repository (replace the `repo` URL with the actual repository where your chart is located).

- **Exports**: Lastly, exporting the kubeconfig and the Kubernetes endpoint allows you to interact with your cluster using `kubectl` after the Pulumi program completes its execution.

To run this code, save it in a TypeScript file (for example, `index.ts`), and then execute it with Pulumi CLI commands:

```shell
pulumi up
```

This command will prompt you to confirm the deployment after showing a preview. Once confirmed, Pulumi will provision the resources as defined.

Remember to replace the placeholder values such as the Helm repository URL (`https://helmrepo.example.com/`) with the actual values that apply to your deployment scenario. If the service mesh operator chart requires additional custom values, you can specify them in the `values` object within the `k8s.helm.v3.Chart` resource.

After you've successfully deployed the Helm chart, you can manage your DigitalOcean Kubernetes Service and the service mesh operator using `kubectl` with the exported kubeconfig file.