Deploy the tyk-stack helm chart on Rancher

Question

Pulumi · Accepted Answer

Deploying a Helm chart on a Rancher-managed Kubernetes cluster using Pulumi requires several steps. First, you'll need a Rancher Kubernetes cluster where you can deploy the Helm chart. Since setting up a Rancher cluster from scratch is out of scope here, I'll assume you already have access to a cluster managed by Rancher.

The following program demonstrates how you can use Pulumi to deploy the "tyk-stack" Helm chart on a Rancher-managed Kubernetes cluster. You are required to have access to the cluster and necessary permissions to deploy Helm charts.

To begin, we will install the necessary Pulumi packages for interacting with Kubernetes and Rancher. The `@pulumi/kubernetes` package allows us to handle Kubernetes resources, and the `@pulumi/rancher2` package lets us interact with Rancher-specific resources if needed.

Here is how you can import these packages and use them to deploy the "tyk-stack" Helm chart:

```typescript
import * as k8s from "@pulumi/kubernetes";
import * as rancher2 from "@pulumi/rancher2";

// Use an existing Rancher cluster, replace `rancherClusterId` with your own cluster ID.
const rancherCluster = new rancher2.Cluster("my-cluster", {
    /* Parameters to access an existing cluster */
});

// Create a provider for the existing Rancher Kubernetes cluster.
const k8sProvider = new k8s.Provider("k8s-provider", {
    kubeconfig: rancherCluster.kubeConfig,
});

// Deploy the "tyk-stack" Helm chart using the Pulumi Kubernetes provider.
const tykStackChart = new k8s.helm.v3.Chart("tyk-stack", {
    // You might need to replace this with the correct repository and chart name.
    chart: "tyk-stack",
    // Specify the Helm chart version you want to deploy.
    version: "x.y.z",
    // Values to pass to the Helm chart, replacing placeholders with actual values.
    values: {
        // Placeholders for values - change these for actual configuration
        someValue: "example-value",
        anotherValue: "another-example",
    },
}, { provider: k8sProvider });

// Export the public endpoint of Tyk Gateway if available from the chart
export const tykGatewayEndpoint = tykStackChart.getResourceProperty("v1/Service", "tyk-gateway", "status")
    .apply(status => status.loadBalancer?.ingress[0]?.ip || status.loadBalancer?.ingress[0]?.hostname);
```

In the above code, we create a Kubernetes provider which uses the kubeconfig from an assumed existing Rancher-managed cluster. Then we use that provider when we instantiate the Helm chart. The values are configured based on what is required for the "tyk-stack" Helm chart. You will need to replace placeholder values with the actual configuration needed for Tyk Stack.

Please make sure to change the placeholder version to the actual version number of the "tyk-stack" Chart you wish to deploy.

Also, replace the Rancher cluster-related placeholders with the actual values coming from your Rancher setup.

Lastly, we export the public endpoint of the Tyk Gateway service, if it's exposed via a LoadBalancer service.

You will need to have Pulumi installed and configured with your preferred cloud provider credentials. After preparing the Pulumi program as shown above, you can deploy your stack using the Pulumi CLI:

```sh
pulumi up
```

This command will show you a preview of the resources that Pulumi will create or modify. After reviewing the changes, you can proceed with the update by selecting "yes".

Remember to install the `@pulumi/rancher2` and `@pulumi/kubernetes` packages in your project using npm or yarn:

```sh
npm install @pulumi/rancher2 @pulumi/kubernetes
```

Or, using yarn:

```sh
yarn add @pulumi/rancher2 @pulumi/kubernetes
```

Please consult the official [Pulumi documentation](https://www.pulumi.com/docs/intro/cloud-providers/kubernetes/guides/#:~:text=using%20helm%20charts) for more details, and always refer to the specific Helm chart documentation for the required version and values.