Deploy the kubecost helm chart on Opensshift

Question

Pulumi · Accepted Answer

Deploying a Helm chart on an OpenShift cluster using Pulumi is straightforward, and the primary resource we will use is `kubernetes.helm.v3.Chart`. This resource allows us to deploy a Helm chart from a repository, local path, or even from a raw Kubernetes manifest.

Here's a step-by-step Pulumi TypeScript program for deploying the Kubecost Helm chart to an OpenShift cluster:

1. **Setting up the project:** It is assumed that you have Pulumi and OpenShift CLI installed and configured on your machine, and that you have an OpenShift cluster where you can deploy resources.

2. **Creating a new Pulumi project:** Start by creating a new directory and running `pulumi new typescript` to create a new Pulumi TypeScript project. Fill in the prompts as they appear.

3. **Writing the code:** In your project's `index.ts` file:

- Import the necessary Pulumi and Kubernetes packages.
   - Use the Pulumi Kubernetes provider to connect to your OpenShift cluster.
   - Define a Helm chart resource for deploying Kubecost.

4. **Executing the code:** You'll run `pulumi up` to deploy your Helm chart to the OpenShift cluster.

Below is the TypeScript program that accomplishes this:

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

// Replace with the appropriate values for your environment
const clusterName = 'your-openshift-cluster-name';
const kubecostChartRepo = 'https://kubecost.github.io/cost-analyzer/';

// Create a Kubernetes provider instance that Pulumi uses to communicate with your OpenShift cluster.
const provider = new k8s.Provider('openshift-k8s', { 
    kubeconfig: process.env.KUBECONFIG // Assumes that KUBECONFIG environment variable is set
});

// Define the Kubecost Helm chart resource.
const kubecost = new k8s.helm.v3.Chart('kubecost', {
    chart: 'cost-analyzer',
    // Fetch the Helm chart from the specified repo.
    fetchOpts: {
        repo: kubecostChartRepo,
    },
    // Optionally, you can specify chart values by providing a 'values' property.
    values: {
        // Set up values that are appropriate for Kubecost
    },
    // Specify the namespace where you want the Helm chart to be installed.
    namespace: 'kubecost-namespace',
    // Specify that Pulumi should use the OpenShift provider to manage the Helm chart resources.
    // Without specifying this, Pulumi will use the default Kubernetes provider.
}, { provider: provider });

// Export the name of the namespace Kubecost was installed into
export const kubecostNamespace = kubecost.namespace;

// Execute this Pulumi program with `pulumi up`
// This will apply the Helm chart and create all associated Kubernetes resources in your Openshift cluster.
```

In this program:
- We import the Kubernetes package that Pulumi provides.
- We create a Kubernetes provider that connects Pulumi to our OpenShift cluster by using the cluster's kubeconfig. You need to set your `KUBECONFIG` environment variable to have the path to your OpenShift kubeconfig file.
- We declare a Helm chart resource named `kubecost` using the `k8s.helm.v3.Chart` class, specifying the chart's name and the repository where Pulumi can pull it from.
- We set the `namespace` option to specify which namespace in OpenShift you want Kubecost to be installed in.
- Finally, we export some details like the namespace for ease of access later.

After writing the program, you would run `pulumi up` in your terminal to deploy the chart.

**Remember:** This program is intended for educational purposes to demonstrate how to use Pulumi to deploy a Helm chart into OpenShift. Always ensure to review and adjust configurations such as namespace, chart values, and others as per your requirements and OpenShift's best practices.