Deploy the cert-manager-webhook-namecheap helm chart on Linode Kubernetes Engine

Question

Pulumi · Accepted Answer

To deploy the `cert-manager-webhook-namecheap` helm chart on Linode Kubernetes Engine using Pulumi, you would typically follow these steps:

1. **Set up the Linode Kubernetes Engine**: You would first need to ensure you have a Kubernetes cluster running on Linode. This cluster is where you will deploy your Helm chart.
2. **Install and Configure Pulumi**: You need to have Pulumi installed and configured on your local machine or CI/CD environment. This includes setting up the Pulumi CLI, creating a new Pulumi project, and configuring access to Linode.
3. **Writing the Pulumi Program**: Write a Pulumi program in TypeScript to deploy the Helm chart to the Kubernetes cluster. This will include using the `kubernetes.helm.v3.Chart` resource.

Here's a detailed Pulumi program that demonstrates how you can deploy the `cert-manager-webhook-namecheap` Helm chart:

```typescript
import * as pulumi from "@pulumi/pulumi";
import * as kubernetes from "@pulumi/kubernetes";

// Replace with the appropriate values for your Linode Kubernetes cluster.
const clusterName = "your-linode-cluster-name";
const kubeconfig = "your-kubeconfig";

// Create a provider to interact with your Linode Kubernetes cluster.
const provider = new kubernetes.Provider("linodeK8s", {
    kubeconfig: kubeconfig,
});

// Define the Helm chart for 'cert-manager-webhook-namecheap' deployment.
const namecheapWebhookChart = new kubernetes.helm.v3.Chart("namecheap-webhook", {
    chart: "cert-manager-webhook-namecheap",
    // You'll usually find the chart in a specific Helm repository. You need to specify the `repo` option if that's the case.
    // If the chart requires to set any specific values, pass them into the 'values' field.
    values: {
        // ... your specific chart values here
    },
    // Ensure you're using the correct namespace if it's different from 'default'.
    // If the namespace does not exist, it will be created by Pulumi.
    namespace: "cert-manager",
}, { provider });

// When your Pulumi program runs, it will use the configuration above to deploy your Helm chart to your Linode Kubernetes cluster.

// Export the endpoint to access the deployed services if the chart provides it.
// The specific details depend on how the Helm chart exposes its services.
export const webhookEndpoint = namecheapWebhookChart.getResourceProperty("v1/Service", "cert-manager/cert-manager-webhook-namecheap", "status.loadBalancer.ingress[0].ip");
```

**Important Notes:**
- Ensure you configure your Pulumi with the appropriate Linode Kubernetes cluster credentials.
- The `kubeconfig` can be retrieved from Linode once you've created your Kubernetes cluster. It is the configuration that allows `kubectl` and by extension, Pulumi, to connect to the cluster.
- The `namespace: "cert-manager"` is used as an example. You should replace it with the namespace that you intend to use for deploying the webhook. If it's a part of the cert-manager setup, ensure that the cert-manager is already installed in this namespace.
- The values under the `values` section in the `namecheapWebhookChart` object need to be configured depending on what settings the `cert-manager-webhook-namecheap` chart expects. These are usually documented along with the chart in its repository.
- The last line, `export const webhookEndpoint`, assumes that your service is exposed with a LoadBalancer and you want to capture the external IP to access it. Update it according to your chart's service specifications.

To run this Pulumi program, save it in a file named `index.ts` within a Pulumi project directory and execute the following commands:

```bash
pulumi up
```

This will start the Pulumi program, which will in turn deploy the Helm chart to your Linode Kubernetes cluster. Follow the CLI prompts to preview and confirm the deployment.