Deploy the letsencrypt-setup helm chart on Google Kubernetes Engine (GKE)

Question

Pulumi · Accepted Answer

To deploy a `letsencrypt-setup` Helm chart on Google Kubernetes Engine (GKE), you'll need to perform several steps. The process involves creating a GKE cluster, installing the Helm CLI, and then using Helm to deploy the chart. With Pulumi, you can automate this entire process.

Below is a TypeScript program that uses Pulumi to:
1. Create a GKE cluster using the `gcp.container.Cluster` resource.
2. Deploy a Helm chart (presumably named `letsencrypt-setup`) onto the GKE cluster using the `kubernetes.helm.v3.Chart` resource from Pulumi's Kubernetes provider.

First, you'll need to set up Pulumi:

- Install Pulumi CLI.
- Set up Google Cloud SDK and `gcloud` CLI.
- Authenticate with Google Cloud and set the project you want to use.
- Install Node.js and NPM to run the program.

Here is a detailed Pulumi TypeScript program that performs these actions:

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

// Create a GCP GKE cluster.
const cluster = new gcp.container.Cluster("letsencrypt-cluster", {
    initialNodeCount: 2,
    nodeVersion: "latest",
    minMasterVersion: "latest",
    nodeConfig: {
        oauthScopes: [
            "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 clusterName = cluster.name;

// K8s provider to use the GKE cluster created above.
const k8sProvider = new k8s.Provider("k8s-provider", {
    kubeconfig: cluster.kubeconfig,
});

// Deploy a Helm chart for letsencrypt-setup onto the GKE cluster.
const letsencryptChart = new k8s.helm.v3.Chart("letsencrypt-setup-chart", {
    chart: "letsencrypt-setup",
    // You can specify the chart version, values, and repository or other configuration here.
    values: {
        // Provide necessary values for your LetsEncrypt setup
    }, 
}, { provider: k8sProvider });

// Export the Helm chart deployment name
export const letsencryptChartName = letsencryptChart.metadata.apply(metadata => metadata.name);

```

In this program:
- We define a GKE cluster with a basic configuration including node count and version.
- We create a Kubernetes provider that uses the kubeconfig from the newly created GKE cluster.
- We deploy a Helm chart named `letsencrypt-setup`. Please note that you should replace placeholder values and parameters (like chart version, values, repository) with the ones specific to your needs; these are typically available in the Helm chart's documentation or values.yaml file.
- We export both the cluster name and the Helm chart deployment name as stack outputs, which are printed to the console after Pulumi deployment.

To run this program, save it in a file named `index.ts`, install the necessary NPM packages by running `npm install`, and then run `pulumi up` to execute it. Pulumi will automate the cloud resource creation and deployment specified in the code.

Please ensure you are familiar with the configuration options of the specific Helm chart you are using, and modify the `values` field with appropriate settings. The Helm chart for `letsencrypt-setup` might require specific configuration parameters, which should be provided as needed.