Deploy the openshift-rbac helm chart on Kubernetes

Question

Pulumi · Accepted Answer

To deploy an OpenShift RBAC Helm chart on a Kubernetes cluster using Pulumi, you need to create a Pulumi program that leverages the Helm capabilities of the Pulumi Kubernetes provider.

The Kubernetes provider can work with existing Helm charts and deploy them in a declarative manner. We'll use the `kubernetes.helm.v3.Chart` class from the Pulumi Kubernetes provider, which allows you to define a Helm chart deployment in your Pulumi program.

What you'll do is define a `Chart` resource in TypeScript to deploy your OpenShift RBAC chart. This assumes that you have the OpenShift RBAC Helm chart available in a Helm repository or locally on your machine.

Before running the following TypeScript program with Pulumi, make sure you have Pulumi installed, you are logged into the desired Kubernetes cluster where you want to deploy the chart, and your `kubectl` is configured to interact with your Kubernetes cluster.

Here is a detailed explanation followed by a TypeScript program that you can use to deploy the OpenShift RBAC Helm chart to your Kubernetes cluster.

### TypeScript Program to Deploy a Helm Chart

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

// Create a new instance of the Helm chart. 
// You need to replace 'your-chart' with the actual name of the chart.
// Also, specify the 'repo' property if your chart is hosted on a Helm repository.
const openshiftRbacChart = new kubernetes.helm.v3.Chart("openshift-rbac", {
    chart: "your-chart",              // The name of the chart, e.g., "openshift-rbac"
    // repo: "http://your-helm-repo/", // The repository URL where the chart is located (if applicable)
    // version: "1.2.3",               // The version of the chart you want to deploy (if needed)
    // If the Chart requires namespace-level access, uncomment the following line and replace 
    // 'your-namespace' with the namespace in which you wish to deploy the chart.
    // namespace: "your-namespace",
    // values: {                       // Values to pass to the Helm chart
    //     key1: "value1",
    //     key2: "value2",
    // },
});

// Export the resources created by the Helm chart, if needed
export const chartResources = openshiftRbacChart.resources;
```

In the above TypeScript code:

- We import the Pulumi Kubernetes package which is necessary to interact with Kubernetes resources.
- We create a new `Chart` instance that represents the OpenShift RBAC Helm chart we want to deploy.
- The chart name should match the name of the chart in the repository or on your local machine.
- If the chart is in a Helm repository, you need to provide the URL via the `repo` option.
- Optionally, you can specify a chart version. If you don't specify one, the latest version will be used.
- If the Helm chart needs to get deployed in a specific namespace, you can set the `namespace` property to the desired namespace.
- You can customize the Helm chart by providing a set of values. This is achieved by setting the `values` property, which accepts a key-value object of the settings you want to override.
- Finally, you might want to export some of the resources for querying outside of Pulumi, which can be done with the `export` statement.

To run the Pulumi program:

1. Save the above code to a file named `index.ts` in a new Pulumi project directory.
2. Run `pulumi up` to preview and then perform the deployment.

Keep in mind that you need to replace placeholders such as `your-chart`, `http://your-helm-repo/`, and `your-namespace` with actual values from your environment. If you're deploying from a local Helm chart, the `path` property pointing to the chart’s directory on your local filesystem can be provided instead of `repo`.

Make sure your Pulumi stack is configured with access to the Kubernetes cluster where you want to deploy the chart. This usually means you have already run `pulumi login`, `pulumi stack init`, and `pulumi config set kubernetes:config:context <your cluster context>` before executing the program.