Deploy the ibm-offline-docs helm chart on Opensshift

Question

Pulumi · Accepted Answer

To deploy an IBM offline docs Helm chart on an OpenShift cluster using Pulumi, you'll need to set up a Pulumi project and install the necessary plugins and SDKs for TypeScript. Pulumi will be interacting with the Kubernetes API to deploy the Helm chart, so make sure your `kubeconfig` file is properly configured to connect to your OpenShift cluster.

After setting up the project, we'll utilize Pulumi's `kubernetes` package, which allows us to deploy Helm charts among other Kubernetes resources. Specifically, we'll use the `Chart` resource from the `kubernetes.helm.v3` module, which wraps Helm functionality to work with charts.

Here's a step-by-step guide along with the TypeScript program to deploy your Helm chart:

### Prerequisites:
1. An OpenShift cluster up and running.
2. Pulumi CLI installed on your machine.
3. `kubectl` configured with access to your OpenShift cluster.
4. Node.js and npm installed to run TypeScript programs.

### Steps:
1. Create a new Pulumi project.
2. Install the required dependencies.
3. Write the TypeScript program.
4. Deploy the Helm chart using Pulumi.
5. Verify the deployment.

### Detailed Explanation and TypeScript Program:

First, install the Pulumi CLI and set up a new Pulumi project by following the instructions on the Pulumi website.

Next, in your new project directory, install the required NPM dependencies:
```sh
npm install @pulumi/pulumi @pulumi/kubernetes
```

Now, create a file named `index.ts` with the following TypeScript program:

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

// Define the configuration for the IBM offline docs Helm chart.
const ibmOfflineDocsChart = new k8s.helm.v3.Chart("ibm-offline-docs", {
    // Here you specify the chart details such as repository, name, and version.
    // If the IBM offline docs chart is publicly available, you may need to include the repository URL.
    // If it's already added to your Helm repositories, you can specify the chart name and version directly.
    chart: "ibm-offline-docs", // Use the actual chart name here
    // Include any custom value overrides that you require for this chart.
    // This is similar to specifying values via '-f values.yaml' or '--set' in Helm.
    values: {
        // Add the required values based on the IBM offline docs Helm chart configurations.
        // For example:
        // image: {
        //   repository: "ibmcom/ibm-offline-docs",
        //   tag: "latest"
        // }
    },
    // Specify the OpenShift project (namespace) where you want to deploy the chart
    namespace: "my-ibm-offline-docs-namespace",
    // Transformations can be used to programmatically alter the resources before they are applied
    transformations: [
        // A possible transformation for OpenShift could be adding a security context constraint, or similar
        (resource) => {
            // Example transformation to modify a Deployment's spec
            if (resource.kind === "Deployment") {
                // Perform required transformations here.
            }
        },
    ],
});

// Export the URL through which the deployed docs can be accessed, if applicable.
// This depends on whether your Helm chart creates a Service with an external endpoint.
export const url = ibmOfflineDocsChart.getResourceProperty("v1/Service", "ibm-offline-docs-service", "status").apply(status => status.loadBalancer.ingress[0].hostname);
```

To deploy the Helm chart to your OpenShift cluster, run the Pulumi CLI command:

```sh
pulumi up
```

This command will initiate the deployment process; Pulumi will show a preview of the resources to be created, and upon confirmation, the resources specified in the `index.ts` script will be deployed to the cluster.

Finally, to verify your deployment, you can list the resources within your OpenShift namespace, or check the Pulumi output URL for the service (if applicable):

```sh
oc get all -n my-ibm-offline-docs-namespace
```

The `export const url` in the TypeScript program is intended to extract the URL from the Service resource created by the Helm chart. Please replace `ibm-offline-docs-service` with the actual name of the Service