Deploy the kerberos-exporter helm chart on Opensshift

Question

Pulumi · Accepted Answer

Deploying a Helm chart to an OpenShift cluster involves several steps. First, you need access to the OpenShift cluster and the appropriate credentials. Then you will use Pulumi's Kubernetes provider to apply the Helm chart to the OpenShift cluster.

We'll assume you have Pulumi and `kubectl` installed and configured to access your OpenShift cluster. We'll also assume that you have already authenticated your `kubectl` with the OpenShift cluster and your `kubeconfig` is set up correctly.

Here's a step-by-step program written in TypeScript that shows how to deploy the `kerberos-exporter` Helm chart to an OpenShift cluster using Pulumi:

1. First, set up your Pulumi project and stack if you haven't done so. You'd typically do this with the `pulumi new` command.
2. Ensure you have the Pulumi Kubernetes provider installed by running `npm install @pulumi/kubernetes`.

Now let's write the program:

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

// We will deploy the kerberos-exporter Helm chart.
// For demonstration purposes, we will assume the chart is available in a public repository.
// Replace 'chartVersion' with the correct version of the Helm chart you want to deploy.
const kerberosExporterChart = new k8s.helm.v3.Chart('kerberos-exporter', {
  // Assuming the chart is in a repository that has been added to your Helm CLI
  // If not, you will need to add the repository with `helm repo add`
  repo: 'chart-repo-name',
  chart: 'kerberos-exporter',
  version: 'chartVersion',
  namespace: 'default', // Specify the namespace where to install the chart. Change if needed.
  // values: { ... } - If the chart requires any values, they can be provided here as an object
  // For example, to specify a custom service type, you might use:
  // values: { service: { type: 'NodePort' } }
});

// If the chart provides any services or other resources with external endpoints,
// you can export these details to access them later on.
export const kerberosExporterService = kerberosExporterChart.getResource('v1/Service', 'kerberos-exporter');

```

In this program:
- We import the Pulumi Kubernetes library.
- We create a new Helm chart deployment by instantiating `k8s.helm.v3.Chart`.
- We assume the `kerberos-exporter` chart is in a repository that has been added to your helm CLI. If not, you will need to add the repository using Helm's `repo add` command.
- We specify the chart's repositiory name (`chart-repo-name`), chart name (`kerberos-exporter`), and chart version. Replace these placeholders with the actual name, chart, and version you intend to deploy.
- The deployment is done in `default` namespace; you can change this to a specific namespace if the Helm chart needs to be deployed elsewhere.
- If the Helm chart requires specific values, such as custom configurations, those values can be passed as an object to the `values` property.
- Finally, we export the service created by the Helm chart. Replace `'kerberos-exporter'` with the actual name of the service that is created by the Helm chart.

Please replace `chart-repo-name` and `chartVersion` with the actual chart repository name and version you wish to deploy.

This Pulumi program should be placed in a file named `index.ts` inside your Pulumi project directory. After writing this code, you can deploy the resources to your OpenShift cluster by running:
```
pulumi up
```

The `pulumi up` command will execute the program, and you will see a summary of the resources Pulumi is about to create. Confirm the deployment, and Pulumi will start executing the plan. Once done, it will output any exported values such as service URLs or endpoints.

Remember that this code assumes you have the right permissions to deploy to the OpenShift cluster. If you encounter permissions issues, ensure you're logged in with a user who has the right roles, and your `kubeconfig` context is set correctly.