Deploy the mutating-webhook helm chart on Digital Ocean Kubernetes Service

Question

Pulumi · Accepted Answer

Deploying a mutating webhook helm chart on a Digital Ocean Kubernetes Service with Pulumi involves several steps, including setting up the DigitalOcean Kubernetes cluster and deploying the Helm chart on that cluster.

To start, we need to create a Kubernetes cluster on Digital Ocean. For that, we will use the `digitalocean.KubernetesCluster` resource. Once the cluster is set up, we will deploy the mutating webhook Helm chart using the `kubernetes.helm.v3.Chart` resource, which is part of the Kubernetes provider.

Below is a Pulumi program written in TypeScript that demonstrates these steps:

1. **Set Up DigitalOcean Kubernetes Cluster:** We create a new Kubernetes cluster using the `digitalocean.KubernetesCluster` resource. We need to specify attributes like the region, version, node pool, etc.

2. **Deploy Helm Chart:** We initialize the Helm chart using the `kubernetes.helm.v3.Chart` resource after configuring the Kubernetes provider with the kubeconfig from the previously created cluster.

Here is the complete TypeScript program:

```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", {
    region: "nyc3",
    version: "latest",
    nodePool: {
        name: "default",
        size: "s-2vcpu-2gb", // Size of the nodes in the node pool
        nodeCount: 2,       // Number of nodes in the node pool
    },
});

// Step 2: Use the DigitalOcean KubeConfig to configure a Kubernetes provider
const k8sProvider = new kubernetes.Provider("do-k8s", {
    kubeconfig: cluster.kubeConfigs[0].rawConfig,
});

// Step 3: Deploy the mutating webhook Helm chart to the DigitalOcean Kubernetes cluster
const chart = new kubernetes.helm.v3.Chart("mutating-webhook-chart", {
    chart: "mutating-webhook",
    // You can specify a specific Helm repository using `repo` field if your Helm chart is not in the default repo.
    // repo: "https://charts.example.com/",
    namespace: "default",
    // Values to pass to the Helm chart, you will need to specify your details based on your chart requirements
    values: {
        // Custom values set according to the mutating webhook Helm chart
    },
}, { provider: k8sProvider });

// Export the cluster's kubeconfig and the chart name
export const kubeconfig = cluster.kubeConfigs[0].rawConfig;
export const chartName = chart.metadata.apply(metadata => metadata.name);
```

This program starts by importing the required modules and defining the main resources:

- A DigitalOcean Kubernetes cluster in the `nyc3` region with two nodes of size `s-2vcpu-2gb`.
- A Kubernetes provider that uses the kubeconfig output of the cluster to connect to it.
- A Helm chart deployment for the mutating webhook using the Kubernetes provider.

Lastly, the program exports the kubeconfig necessary to access the cluster and the name of the Helm chart that was deployed, allowing you to interact with the cluster using standard Kubernetes tools like `kubectl`.

Make sure to replace the `chart` field with the actual name of your mutating webhook Helm chart and configure the `values` field with the values required for your particular chart usage.

Keep in mind that the `digitalocean.KubernetesCluster` and `kubernetes.helm.v3.Chart` resources' configurations should be adapted based on your specific requirements, such as cluster size, region, Helm chart version, parameters, etc.

The Helm chart name `'mutating-webhook'` is used as a placeholder here. You should replace this with the actual name of the Helm chart you want to install and specify any chart-specific configuration under the `values` key.

Additionally, you might want to give your resources more distinctive names, depending on your environment and the naming conventions you use.