Deploy the flink-app helm chart on Opensshift

Question

Pulumi · Accepted Answer

To deploy the `flink-app` Helm chart on an OpenShift cluster using Pulumi, you will leverage the Pulumi Kubernetes provider. This provider allows us to work with Kubernetes resources, including managing Helm charts.

Before you can deploy a Helm chart, you'll need to have access to an OpenShift cluster and have configured `kubectl` on your local machine to communicate with the cluster. I'll walk you through creating a Pulumi program that will deploy a Helm chart, but please ensure you have the necessary cluster access before running this Pulumi code.

Here are the steps we'll follow in the Pulumi program:
1. **Import necessary libraries**: We'll import the Pulumi Kubernetes library to work with Kubernetes resources.
2. **Create a Kubernetes Provider**: This is how Pulumi communicates with your OpenShift cluster. It's set up to use your current `kubectl` configuration.
3. **Define the Helm Release**: We'll define a Helm Release resource to deploy the `flink-app` chart.

Now, here is the Pulumi program in TypeScript that performs this deployment:

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

// Step 1: Provide the namespace where you want to deploy your application.
const namespace = "default"; // You might want to change "default" to a specific namespace

// Step 2: Define the Helm chart release. Adjust the "repo" and "chart" properties to point to the correct chart.
const flinkAppChart = new k8s.helm.v3.Chart("flink-app", {
    namespace,
    chart: "flink-app", // Replace this with the actual chart name, if it's different
    // If the Helm chart is from a custom repository, specify `repo` and optionally `version`
    // repo: "https://your-helm-chart-repo.com",
    // version: "1.2.3", 
    // values: { /* Your customization values here */ }
}, { provider: k8sProvider }); // Attach the cluster provider, if it's not the default

// Step 3: (Optional) Export any useful information, for example the app service URL.
// If `flink-app` service creates an external endpoint, you can retrieve and export its URL like this:
// export const flinkAppServiceUrl = flinkAppChart.getResourceProperty("v1/Service", "flink-app", "status").apply(s => s.loadBalancer.ingress[0].ip);
```

In this program:
- We use `@pulumi/kubernetes` to interact with Kubernetes resources, which includes deploying Helm charts.
- We define the `flink-app` Helm chart and (optionally) provide custom values if required. You must replace the placeholder `chart` value with the actual name of the chart you're deploying.
- We comment out the repository and version information, as you would need to uncomment and provide this information if you are using a chart from a custom Helm repository.
- The `k8sProvider` argument for the `Chart` resource is commented out as it should be used if you've explicitly created a provider that's different from the one picking up the current context from `kubectl`.

Keep in mind that you might need to adjust the `values` property to accommodate any specific configurations for the Helm chart you're deploying.

Please make sure you've set up Pulumi and `kubectl`, and you are authorized to deploy to the OpenShift cluster. You can run this program with Pulumi CLI after saving it to a file with a `.ts` extension, and you of course need Node.js and npm/yarn to manage dependencies.