Deploy the vps helm chart on Kubernetes

Question

Pulumi · Accepted Answer

To deploy a Helm chart on Kubernetes using Pulumi, you will need to use the `Chart` resource from the `@pulumi/kubernetes` package. This resource allows you to deploy applications packaged as Helm charts onto a Kubernetes cluster. Helm is a package manager for Kubernetes that packages multiple Kubernetes resources into a single logical deployment unit called a chart.

Here's how you might deploy a hypothetical Helm chart named `vps` in TypeScript using Pulumi:

1. First, ensure that you have both Pulumi and Helm installed on your system.
2. Next, you will set up Pulumi to connect to your Kubernetes cluster. Make sure your `kubeconfig` is correctly set up to interact with your cluster.
3. You will then write a Pulumi program that defines a `kubernetes.helm.sh/v3.Chart` resource, which represents the `vps` chart you wish to deploy.

Below is a Pulumi program that achieves the deployment:

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

// Create an instance of the Helm Chart
const vpsChart = new kubernetes.helm.v3.Chart("vps-helm-chart", {
  chart: "vps",
  version: "1.2.3", // replace with a specific chart version; omit if you want to pull the latest
  // Set the namespace where the Helm chart will be installed
  namespace: "default",
  // You can add custom values which will overwrite the defaults of the Helm chart
  values: {
    // Provide configuration values here, like
    // serviceType: "LoadBalancer",
  },
  // In case you have your Helm chart in a custom repository, you need to add `repo` attribute here
  // repo: "http://myhelmrepo.com/charts",
});

// Export any pertinent resources; for example, the public URL if there's an associated LoadBalancer service
export const vpsChartPublicUrl = vpsChart.getResourceProperty("v1/Service", "my-service", "status").apply(status => status.loadBalancer.ingress[0].hostname);
```
This program does the following:

- It imports the `@pulumi/kubernetes` module, which contains the necessary classes for working with Kubernetes resources in Pulumi.
- It creates a new Helm chart instance by calling `new kubernetes.helm.v3.Chart()`. You pass a name for this instance (`"vps-helm-chart"`) as the first argument.
- The chart name (`"vps"`) is passed in the `chart` key inside the second argument's options object. This should be the name of the Helm chart you wish to deploy.
- Optionally, the `version` key specifies the version of the Helm chart you want to deploy. If you want to always deploy the latest version, you can omit this option.
- The `namespace` key is used to specify which namespace in the Kubernetes cluster you want to deploy the chart to. This example uses the default namespace.
- The `values` key allows you to customize the Helm chart by overriding its default values. Replace the placeholder with actual configuration keys and values that are appropriate for the `vps` chart.
- If your Helm chart is located in a custom repository, you would uncomment the `repo` key and set its value to your repository's URL.
- At the end of the Pulumi program, there's an example of how to export a resource property, such as a Service's public URL, after it's been created by the Helm chart. Adjust the `getResourceProperty` call to reference any specific resources and properties you wish to export.

To run this Pulumi program, you would execute it within a Pulumi project. If you have not set up one, you can create a new project by running `pulumi new` in the terminal and selecting a template that matches your use case. Once the project is set up, save this code in the `index.ts` file, and run `pulumi up` to execute the program and deploy the chart to your Kubernetes cluster.

Remember to replace the placeholders and parameters such as `chart`, `version`, `values`, and `repo` with the actual values for the `vps` chart you are deploying.