Deploy the gardener-webterminal helm chart on Kubernetes

Question

Pulumi · Accepted Answer

To accomplish the deployment of the `gardener-webterminal` Helm chart on a Kubernetes cluster using Pulumi, we will use the Pulumi Kubernetes provider. Pulumi's Kubernetes provider allows us to interact with Kubernetes resources using real programming languages, in this case TypeScript.

The primary Pulumi resource we will be utilizing is the `Chart` resource from the Kubernetes package (`kubernetes.helm.v3.Chart`), which serves as a representation of a Helm chart. By using this `Chart` resource, we can specify the Helm chart we want to deploy, configure the settings, and deploy it onto our Kubernetes cluster.

Below is the program which will create a new instance of a `Chart` resource. This program assumes that you have a Kubernetes cluster already configured and is accessible via `kubectl` from the same environment where Pulumi CLI is installed.

First, we set up the TypeScript program with the necessary imports, and then define our deployment within the `async` main function which is invoked at the end of the program.

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

// A function that deploys a Helm chart for the gardener-webterminal.
const deployGardenerWebterminal = async () => {
    // Instantiate the Helm Chart for the gardener-webterminal.
    const webterminalChart = new k8s.helm.v3.Chart('gardener-webterminal', {
        // Specify the repository where the Helm chart can be found.
        // This URL should be adjusted to point to the actual repository URL of the gardener-webterminal chart.
        // For instance, if the chart is hosted in a Helm repository, you would provide the URL to that repository here.
        repo: 'https://charts.gardener.cloud/stable',
        // Specify the name of the chart.
        chart: 'gardener-webterminal',
        // Version of the Helm chart to deploy. Replace with the desired version.
        version: '1.0.0',
        // Default values or overrides for the chart values.
        // Here we provide a plain object, but this could also be loaded from a separate YAML/JSON file.
        // You should populate the 'values' field with the necessary values that are specific to the gardener-webterminal chart.
        values: {
            // Dummy example values - replace with actual values needed for the gardener-webterminal chart.
            service: {
                type: 'ClusterIP',
            },
        },
        // Specify the namespace where the chart should be deployed.
        // If omitted, it will use the default namespace.
        namespace: 'default',
    });

// Wait for the chart to be deployed before proceeding.
    await webterminalChart.ready();
};

deployGardenerWebterminal().catch((error) => console.error(error));
```

To explain further:

- `import * as k8s from '@pulumi/kubernetes';`: This line imports the Kubernetes package from Pulumi, which provides the resources and types necessary for working with Kubernetes in TypeScript.

- `new k8s.helm.v3.Chart(...)`: This line creates a new Helm chart resource. The constructor takes in a name for the resource (`gardener-webterminal`) and a configuration object.

- Inside the configuration object of the `Chart` resource:
  - `repo`: This is the URL of the Helm chart repository that contains the `gardener-webterminal` Helm chart.
  - `chart`: The name of the chart to deploy.
  - `version`: The version of the Helm chart to deploy. You should replace `'1.0.0'` with the actual version number of the `gardener-webterminal` Helm chart that you wish to install.
  - `values`: This object should contain all of the configuration settings that you wish to override or specify for your Helm chart. You would need to replace the placeholder values provided with the actual values required by the `gardener-webterminal` chart.
  - `namespace`: This specifies the Kubernetes namespace in which to deploy the Helm chart. If you wish to deploy into a different namespace, change `'default'` to the name of that namespace.

- `await webterminalChart.ready();`: This line ensures that the program waits for the Helm chart to be fully deployed before exiting the asynchronous function.

Remember to install the Pulumi Kubernetes package by running `npm install @pulumi/kubernetes` if you haven't already, and ensure you have the correct Helm repository and chart values configured in the `values` object.

Once you are ready to deploy the `gardener-webterminal`, you may run `pulumi up` to start the deployment process. Pulumi will provide a preview of the changes and will wait for your confirmation before applying these changes to your cluster.

Remember to check the Pulumi documentation for the [kubernetes.helm.v3.Chart](https://www.pulumi.com/registry/packages/kubernetes/api-docs/helm/v3/chart/) to understand all the properties available and how to correctly configure your Helm chart deployment.