Deploy the vtn-service helm chart on Kubernetes

Question

Pulumi · Accepted Answer

To deploy a Helm chart to a Kubernetes cluster using Pulumi, you'll want to use the `Chart` resource from the `@pulumi/kubernetes` package. This allows you to deploy Helm charts in a declarative way, leveraging the full capabilities of Pulumi for infrastructure as code.

Assuming you have a Kubernetes cluster already running and `kubectl` configured to connect to it, you can use Pulumi to deploy the `vtn-service` Helm chart to your cluster. You'll need to specify the repository where the chart is located (if it's not a stable chart that's already included in the Helm repo), the version of the chart, and any custom values you want to override.

Here's a step-by-step program written in TypeScript to deploy the `vtn-service` Helm chart on Kubernetes with Pulumi:

1. **Install Node.js and Pulumi**: Ensure that Node.js and Pulumi are installed on your system.
2. **Set up a new Pulumi project**: You can create a new Pulumi project by running `pulumi new kubernetes-typescript` in your terminal.

After setting up the project, write this program in the `index.ts` file at the root of your Pulumi project:

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

// Create an instance of the vtn-service Helm chart.
const vtnServiceChart = new k8s.helm.v3.Chart('vtn-service', {
    // Replace with the actual repo URL where your chart is hosted.
    // If the chart is hosted in a public Helm repository, like Bitnami or stable, specify the repo's name.
    repo: 'your_helm_chart_repo',
    chart: 'vtn-service',
    // Specify the version of the chart you want to deploy.
    version: '1.0.0', // Replace with the version you need
    // If needed, provide custom values to the Helm chart. Below is an example structure.
    values: {
        service: {
            type: 'ClusterIP',
            port: 80,
        },
        // Add other custom configuration if needed.
    },
});

// Export the ClusterIP of the vtn-service
export const vtnServiceClusterIP = vtnServiceChart.getResourceProperty(
    'v1/Service',
    'vtn-service', // Replace with the correct service name, if different
    'spec.clusterIP',
);
```

In this code:

- We import the Kubernetes package from Pulumi to interact with Kubernetes resources.
- We create a new `Chart` resource called `vtn-service`. You need to replace the `repo` property with the name of the repository containing your chart or the URL of the custom Helm chart repository.
- We specify the chart name (`vtn-service`) and the version (`1.0.0`). You'll need to replace these with the actual name and version of the Helm chart you wish to deploy.
- We pass an object to the `values` property to override any default values provided by the Helm chart. In this example, we are configuring the type and port for a `Service` resource. You would adjust the `values` according to what the `vtn-service` Helm chart exposes for configuration.
- Finally, we export the ClusterIP of the service created by the Helm chart to be accessible from outside Pulumi (for consumption, inspection, etc.).

To run this Pulumi program:

1. Save the code in your Pulumi project's `index.ts` file.
2. Run `pulumi up` from the command line within your Pulumi project directory. Pulumi will perform a preview and show you the proposed changes.
3. If everything looks good, confirm the deployment by selecting `yes` when prompted.

The `pulumi up` command will apply the changes to your cluster and deploy the `vtn-service` Helm chart. When the deployment is complete, Pulumi will output the allocated ClusterIP if you have exported that value.