Deploy the stateless-istio helm chart on Digital Ocean Kubernetes Service

Question

Pulumi · Accepted Answer

To deploy the `stateless-istio` Helm chart onto a DigitalOcean Kubernetes cluster using Pulumi, you will need to follow these steps:

1. **Create a DigitalOcean Kubernetes Cluster**: This will serve as the foundation where your applications will run. You will use the [`digitalocean.KubernetesCluster`](https://www.pulumi.com/registry/packages/digitalocean/api-docs/kubernetescluster/) resource for this.

2. **Install the `stateless-istio` Helm chart**: After setting up the Kubernetes cluster, you will deploy your Helm chart onto it. For this, you will use the [`kubernetes.helm.sh/v3.Chart`](https://www.pulumi.com/registry/packages/kubernetes/api-docs/helm.sh/v3/chart/) resource. Please note that `stateless-istio` should be an available chart or you may need to use the proper chart name according to your specific requirements.

Below is a TypeScript program illustrating how this can be done. This program assumes that you have already set up Pulumi with the necessary cloud provider configuration and the Pulumi CLI is installed on your system.

```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: digitalocean.Regions.NYC3,
    version: "latest", // Specify your desired Kubernetes version
    nodePool: {
        name: "default",
        size: digitalocean.DropletSlugs.DOS2VCPU8GB, // Choose the desired size for your worker nodes
        nodeCount: 2,
    },
});

// Get the kubeconfig from the cluster
const kubeconfig = pulumi.secret(cluster.kubeConfigs[0].rawConfig);

// Create a provider to use the kubeconfig and then deploy the chart.
const k8sProvider = new k8s.Provider("k8s-provider", {
    kubeconfig: kubeconfig,
});

// Deploy the `stateless-istio` Helm chart.
const chart = new k8s.helm.v3.Chart("stateless-istio", {
    chart: "stateless-istio",  // You may need to confirm the exact chart name and provide repository details if the chart is not in the default Helm repo.
    // You would also specify any custom `values` here if required.
}, { provider: k8sProvider });

// Export the cluster's kubeconfig.
export const kubeconfigOut = kubeconfig;
```

Here's what each part of the code is doing:

- The `digitalocean.KubernetesCluster` resource creates a new Kubernetes cluster on DigitalOcean. We're specifying the region, the Kubernetes version, and details about the node pool, such as the size of the droplets and the number of nodes.
  
- The Kubernetes provider is then created using the `kubeconfig` obtained from the cluster, allowing Pulumi to communicate with your new Kubernetes cluster.

- With the Kubernetes provider configured, we create a `Chart` resource, which tells Pulumi to deploy the specified Helm chart. If the `stateless-istio` chart requires specific values or is stored in a custom Helm repository, those details would need to be provided here.

- Lastly, we export the `kubeconfig` for the cluster so that it can be used to interact with the Kubernetes cluster using `kubectl` or any other Kubernetes management tool.

To run this Pulumi program, save it to a file called `index.ts`, and then execute `pulumi up` to create the resources. This will provision a new DigitalOcean Kubernetes cluster and deploy the `stateless-istio` Helm chart to it. Always remember to review the plan provided by `pulumi up` before confirming the changes, ensuring that all the actions taken by Pulumi are intended.