Deploy the haproxytech-haproxy-ingress helm chart on Kubernetes

Question

Pulumi · Accepted Answer

To deploy the `haproxytech-haproxy-ingress` Helm chart on a Kubernetes cluster using Pulumi, we will use the `kubernetes.helm.v3.Chart` resource from Pulumi's Kubernetes provider. This resource allows us to deploy Helm charts into a Kubernetes cluster in a declarative way using infrastructure as code.

Here's what we're going to do in the TypeScript Pulumi code:

1. **Import Required Packages**: We'll include the Pulumi Kubernetes package to access Kubernetes resources.

2. **Instantiate Helm Chart**: We'll create an instance of `Chart` to represent the `haproxytech-haproxy-ingress` chart. We need to specify the chart name, optionally the version, and any custom values we want to override.

3. **Deploy**: Pulumi will handle the deployment to the cluster specified in the currently configured Kubernetes context.

Here is TypeScript code that accomplishes the deployment:

```typescript
import * as k8s from "@pulumi/kubernetes";

// Create an instance of the Kubernetes Helm Chart class to deploy the haproxytech-haproxy-ingress chart.
// We're using default values here, but custom configuration parameters can be provided through the `values` attribute.
const haproxyIngress = new k8s.helm.v3.Chart("haproxy-ingress", {
    chart: "haproxy-ingress",
    version: "1.17.1", // Specify the chart version you want to deploy; change this as needed.
    fetchOpts: {
        repo: "https://haproxy-ingress.github.io/charts", // The repository where the chart is located.
    },
    // If you have any custom values you want to override,
    // provide them here in the values object. For example:
    // values: {
    //   replicaCount: 2,
    // },
});

// Export the external IP address of the Ingress controller if needed.
export const ingressIp = haproxyIngress.getResourceProperty("v1/Service", "haproxy-ingress", "status")
    .apply(status => status.loadBalancer.ingress[0].ip);
```

Here's a detailed explanation of some key elements in this code:

- **Helm Chart Resource**: In `new k8s.helm.v3.Chart`, we're defining a Helm chart resource. This is the main component of our script that lets Pulumi know we want to deploy a Helm chart.

- **Chart Parameters**: The `chart` parameter inside the `Chart` instantiation is the name of the chart we want to install. In this case, it's `"haproxy-ingress"`. The `fetchOpts.repo` points to the repository where the Helm chart is stored.

- **Version**: We specify the `version` of the Helm chart we want to use. It is essential to use a specific version to ensure our infrastructure is immutable and changes to the chart don't break our deployment unexpectedly. This can be omitted to pull the latest version.

- **Values Override**: The `values` parameter is a JavaScript object that can specify any custom values for our Helm chart that we want to override. This example is commented out as it's optional and specific to your needs.

- **Export**: The `export` statement at the end of the program is used to output values of our deployment that we might need to access later, such as the ingress IP address.

Finally, once you have this code, you will need to run it with Pulumi. As a novice, you'll need to have Pulumi installed and configured to connect to a Kubernetes cluster. Then you would navigate to the directory containing your Pulumi TypeScript program and run it using the Pulumi CLI.

For more detailed information on the `Chart` resource, please refer to [Pulumi's Documentation](https://www.pulumi.com/registry/packages/kubernetes/api-docs/helm/v3/chart/).