Deploy the tyk-data-plane helm chart on Rancher

Question

Pulumi · Accepted Answer

Deploying a Helm chart on a Rancher-managed Kubernetes cluster involves several steps. Assuming you have Rancher set up and running, you will need to interact with the Kubernetes API to deploy the Helm chart. Pulumi does not have a dedicated rancher2.HelmChart resource, but you can utilize Pulumi's Kubernetes provider to manage and deploy Helm charts on Rancher.

Here's what you need to do to deploy the `tyk-data-plane` Helm chart on a Rancher Kubernetes cluster using Pulumi and TypeScript:

1. **Set up your Pulumi environment**: Ensure you have installed Pulumi CLI and have set up your Pulumi project with the appropriate stack configurations. Pulumi will use your kubeconfig file to interact with your Kubernetes cluster.

2. **Instantiate Kubernetes provider**: In your Pulumi program, create an instance of the Kubernetes provider. If your Rancher cluster's kubeconfig is not the default, be sure to specify the kubeconfig file's path.

3. **Deploy Helm Chart**: Use the `helm.v3.Chart` resource from Pulumi's Kubernetes provider to deploy the Helm chart into your cluster. You will specify the chart name, version, and any custom values that the chart requires.

Let me show you a TypeScript program that accomplishes this:

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

// Your configuration settings for the 'tyk-data-plane' Helm chart
const chartName = "tyk-data-plane";
const chartVersion = "x.y.z"; // replace with the chart's version you wish to deploy
const namespace = "tyk"; // specify the namespace where the chart should be deployed

// Instantiate the Kubernetes provider using the current context from kubeconfig
const k8sProvider = new k8s.Provider("k8s-provider", {
    // If you have a specific kubeconfig for your Rancher cluster, you can specify it here
    // If omitted, Pulumi will use the default kubeconfig from your local environment
    kubeconfig: "path-to-rancher-kubeconfig.yaml", // replace with the path to your Rancher cluster's kubeconfig, or omit
});

// Deploy the 'tyk-data-plane' Helm chart
const tykDataPlaneChart = new k8s.helm.v3.Chart(chartName, {
    chart: chartName,
    version: chartVersion,
    namespace: namespace,
    // If there are any custom values you wish to override, specify them here inside `values`
    values: {
        // Example of a custom value:
        // replicaCount: 2,
    },
}, { provider: k8sProvider });

export const chartNameExport = tykDataPlaneChart.metadata.name;
```

In the above program:

- We import the Kubernetes module from the Pulumi library.
- We define some configuration variables for our Helm chart deployment, like the chart name, version, and namespace.
- We create a new instance of the Kubernetes provider. If your kubeconfig is not the default one Pulumi should use, you'll need to provide the path to it.
- We deploy the Helm chart using `new k8s.helm.v3.Chart` and pass in our configuration details. This will instruct Pulumi to create the resources as defined by the `tyk-data-plane` Helm chart in your Kubernetes cluster.
- We export the name of the deployed Helm chart as a Pulumi stack output.

Before running this Pulumi program, make sure you install the necessary Pulumi packages using `npm install` or `yarn add` for `@pulumi/pulumi` and `@pulumi/kubernetes`.

This program should then be run using the Pulumi CLI with the `pulumi up` command. Pulumi will perform a preview showing you what resources will be created, and upon confirmation, it will deploy the chart to your cluster. Remember to replace `"x.y.z"` with the actual version of `tyk-data-plane` Helm chart you want to deploy and provide your kubeconfig path if it's not loaded in your default KUBECONFIG environment variable.