Deploy the terraform-backend helm chart on AWS EKS

Question

Pulumi · Accepted Answer

To deploy the `terraform-backend` Helm chart on AWS EKS, you will need to follow several steps. First, you'll set up an EKS cluster using the Pulumi EKS package. This package simplifies creating and configuring an EKS cluster. Once the cluster is in place, you can deploy the Helm chart to it using the Pulumi Kubernetes provider.

The code below demonstrates how these steps can be implemented using Pulumi with TypeScript. Ensure that you've configured your AWS and Pulumi credentials before running this program.

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

// Create a VPC for our cluster.
const vpc = new awsx.ec2.Vpc("my-vpc", { numberOfAvailabilityZones: 2 });

// Create an EKS cluster with the default configuration.
const cluster = new eks.Cluster("my-cluster", {
    vpcId: vpc.id,
    subnetIds: vpc.publicSubnetIds,
    instanceType: "t2.medium",
    desiredCapacity: 2,
    minSize: 1,
    maxSize: 2,
    storageClasses: "gp2",
    deployDashboard: false,
});

// Export the cluster's kubeconfig.
export const kubeconfig = cluster.kubeconfig;

// Create a Kubernetes provider instance that uses our cluster from above.
const provider = new k8s.Provider("provider", {
    kubeconfig: cluster.kubeconfig.apply(JSON.stringify),
});

// Deploy the terraform-backend helm chart.
const terraformBackendChart = new k8s.helm.v3.Chart("terraform-backend", {
    chart: "terraform-backend",
    version: "chart-version", // specify the version of the chart
    fetchOpts: {
        repo: "https://helm-repository-url", // specify the Helm repository URL
    },
}, { providers: { kubernetes: provider } });

// Export the URL by querying the load balancer assigned by the helm chart
const frontendService = terraformBackendChart.getResource("v1/Service", "terraform-backend", "terraform-backend-service");
export const frontendUrl = frontendService.status.apply(status => `http://${status.loadBalancer.ingress[0].hostname}/`);
```

This program does the following:
- Imports the necessary Pulumi libraries.
- Creates a new VPC with two availability zones for high availability.
- Creates an EKS cluster with a desired capacity of 2 t2.medium instances.
- Exports the generated kubeconfig which is used to interact with the cluster.
- A Kubernetes provider is set up to use the kubeconfig of the EKS cluster for deploying resources.
- Deploys the `terraform-backend` Helm chart to the cluster. You'll need to replace `chart-version` with the version of the Helm chart you wish to deploy and `https://helm-repository-url` with the URL of the repository where the Helm chart is hosted.
- Exports the URL of the terraform-backend service by querying the load balancer.

Make sure you replace placeholders like `chart-version` and `https://helm-repository-url` with actual values corresponding to the `terraform-backend` Helm chart you wish to deploy.

Before you can apply this Pulumi program, ensure that you have the following prerequisites:
- AWS CLI installed and configured with the necessary credentials.
- Pulumi CLI installed.
- kubectl installed to interact with the Kubernetes cluster.

After verifying the prerequisites, you can run the following commands to deploy your infrastructure:
1. Initialize a new Pulumi project: `pulumi new typescript`.
2. Install the required dependencies:
   ```sh
   npm install @pulumi/pulumi @pulumi/awsx @pulumi/eks @pulumi/kubernetes
   ```
3. Place the TypeScript code in `index.ts`.
4. To preview and deploy the changes, run `pulumi up`.
5. After deployment, you can find the service URL of the terraform-backend by inspecting the outputs.

Remember, when working with public cloud providers and Kubernetes, you should always be mindful of the associated costs and security implications, such as ensuring your services are not publicly accessible if they should remain private.