Deploy the tyk-gateway helm chart on Google Kubernetes Engine (GKE)

Question

Pulumi · Accepted Answer

To deploy the Tyk Gateway helm chart on Google Kubernetes Engine (GKE) using Pulumi, you would first need to create a GKE cluster and then deploy the helm chart onto this cluster.

We will be using the following Pulumi resources:
- `google-native.container/v1.Cluster`: This will create a GKE cluster in the specified location with the desired settings. This resource allows us to configure all the necessary settings for our Kubernetes cluster, including node pools, networking, and access controls. For the full list of configurable options and their descriptions, you can refer to the [official Pulumi documentation for GKE Cluster](https://www.pulumi.com/registry/packages/google-native/api-docs/container/v1/cluster/).
- `kubernetes.helm.v3.Chart`: This Pulumi resource is used to deploy a helm chart to a Kubernetes cluster. Helm charts help to simplify the deployment and management of applications on Kubernetes.

Below is a detailed TypeScript program that demonstrates how to create a GKE cluster and deploy the Tyk Gateway helm chart on it:

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

// Configurable variables for the GKE cluster
const clusterName = "tyk-gateway-cluster";
const clusterLocation = "us-west1"; // You can select an appropriate location
const nodeCount = 2; // Number of nodes in the GKE cluster

// Create a GKE cluster.
const cluster = new gcp.container.Cluster(clusterName, {
    name: clusterName,
    location: clusterLocation,
    initialNodeCount: nodeCount,
    nodeConfig: {
        machineType: "n1-standard-1", // Assumed machine type, can be adjusted as per requirements
        oauthScopes: [ // Set of minimum scopes needed for the GKE nodes
            "https://www.googleapis.com/auth/compute",
            "https://www.googleapis.com/auth/devstorage.read_only",
            "https://www.googleapis.com/auth/logging.write",
            "https://www.googleapis.com/auth/monitoring"
        ],
    },
});

// Export the Cluster name
export const gkeClusterName = cluster.name;

// Create a Kubernetes provider instance that uses our GKE cluster from above.
const k8sProvider = new k8s.Provider("k8s-provider", {
    kubeconfig: cluster.kubeConfigRaw,
});

// Deploy the Tyk Gateway helm chart.
const tykGatewayChart = new k8s.helm.v3.Chart("tyk-gateway", {
    chart: "tyk-gateway",
    version: "1.0.0", // Replace with an actual chart version
    fetchOpts: {
        repo: "https://helm.tyk.io/public/helm/charts/", // Replace with the Tyk Gateway helm chart repository URL
    },
    }, { provider: k8sProvider });

// Export the Helm chart's status
export const helmChartStatus = tykGatewayChart.status;

```

This Pulumi program performs the following actions:
- Imports the necessary Pulumi packages for working with GCP and Kubernetes.
- Defines configurable variables for the GKE cluster such as `clusterName`, `clusterLocation`, and `nodeCount`.
- Creates a new GKE cluster using the `gcp.container.Cluster` class with the specified machine type and OAuth scopes for the nodes.
- Exports the cluster name as a stack output.
- Sets up a Kubernetes provider using the newly created GKE cluster's `kubeConfigRaw` data.
- Deploys the Tyk Gateway helm chart to the GKE cluster using the `k8s.helm.v3.Chart` class.
- Exports the status of the helm chart deployment as a stack output.

To apply this program:
1. Save the above TypeScript code into a file named `index.ts`.
2. Run `pulumi up` within the same directory as your `index.ts` file and Pulumi will begin to create the GKE cluster and deploy the Tyk Gateway helm chart.
3. After completion, Pulumi CLI will output the exported variables, including the `gkeClusterName` and `helmChartStatus`.

You can further customize this program by editing the configuration variables or by adding additional options to the GKE cluster and Helm chart deployments.