Deploy the nodejs-ex-k helm chart on Kubernetes

Question

Pulumi · Accepted Answer

To deploy the `nodejs-ex-k` Helm chart on a Kubernetes cluster using Pulumi, you will use the `@pulumi/kubernetes` package. This package allows you to deploy Helm charts, among other things, in a Kubernetes cluster.

In the program below, we're defining a Helm chart resource that references the `nodejs-ex-k` chart. You should specify the name of the chart, the version if necessary, and the repository where the chart can be found.

Here's how you would do it:

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

// Create a Helm Chart resource using `nodejs-ex-k` chart.
const nodejsExKChart = new k8s.helm.v3.Chart("nodejs-helm-chart", {
    chart: "nodejs-ex-k",
    // Specify the repository URL where the chart can be fetched from.
    // You need to provide a real repository URL here where `nodejs-ex-k` chart is hosted.
    // For this example, I'm using a placeholder URL.
    fetchOpts: {
        repo: "https://charts.example.com/", 
    },
    // Optionally, specify the version if needed.
    // version: "1.0.0",
    // Specify any custom values to the chart.
    // This is optional and dependent on the chart specifications.
    // values: {
    //     key: "value",
    // },
});

// Export the base URL (if applicable) to access the application.
export const appUrl = /* Extract the app's URL if your Helm chart contains an Ingress or similar */;
```

Let's break down the important parts:

- `@pulumi/kubernetes`: This is the Pulumi Kubernetes provider library that is necessary to interact with Kubernetes resources within a Pulumi program.
- `k8s.helm.v3.Chart`: This is the class within the Pulumi Kubernetes SDK that represents a Helm chart deployment.
- `chart`: The name of the Helm chart you want to deploy.
- `fetchOpts.repo`: The repository where the Helm chart is hosted.
- `values`: Key-value pairs passed to the Helm chart which correspond to various settings you may want to customize.

Keep in mind that you'll need to specify the actual repository URL where the `nodejs-ex-k` Helm chart is hosted. You may also want to adjust the parameters under `values` to configure your instance of the chart to suit your needs.

To use this program:
1. Ensure you have [Pulumi installed](https://www.pulumi.com/docs/get-started/install/) and set up to work with your Kubernetes cluster.
2. Create a new Pulumi project and choose `typescript` when prompted for the language.
3. Replace the contents of `index.ts` with the code provided above.
4. Run `pulumi up` to preview and deploy the resources. Pulumi CLI will prompt you to confirm that you want to create these resources based on the preview.

Remember, before deploying the Helm chart, make sure that your Kubernetes cluster is up and running, and that you have configured Pulumi to connect to your cluster either through the `kubeconfig` file or environment variables.