GKE Demo with Terraform

This repository contains Terraform configurations to deploy a Google Kubernetes Engine (GKE) cluster with custom networking settings.

Prerequisites

• Google Cloud Platform (GCP) Account
• Google Cloud SDK
• Terraform
• GCP Project with required APIs enabled:
  • Compute Engine API
  • Kubernetes Engine API
  • Cloud Resource Manager API

Network Configuration

The cluster is configured with the following IP ranges:

• Nodes: 10.0.0.0/16
• Pods: 10.1.0.0/16
• Services: 10.2.0.0/16

Example output:

Usage

1. Clone the repository:

git clone https://github.com/cvitaa11/gke-demo.git
cd gke-demo/infra/example

2. Create a terraform.tfvars file with your project settings:

project_id     = "your-project-id"
region         = "your-desired-region"
node_locations = ["your-desired-AZs"]

3. Initialize Terraform

terraform init

4. Review the plan:

terraform plan

5. Apply the configuration:

terraform apply

6. After deployment, configure kubectl:

gcloud container clusters get-credentials $(terraform output -raw kubernetes_cluster_name) --region $(terraform output -raw region)

Terraform resources

Name	Version
terraform	~> 1.5.7
google	6.8.0

Providers

Name	Version
google	6.8.0

Resources

Name	Type
google_compute_network.vpc	resource
google_compute_subnetwork.subnet	resource
google_container_cluster.primary	resource
google_container_node_pool.primary_nodes	resource
google_container_engine_versions.gke_version	data source

Inputs

Name	Description	Type	Default	Required
node_ip_range	IP address range of GKE nodes	string	"10.0.0.0/16"	no
node_locations	Availability zone of the GKE nodes	any	n/a	yes
pod_ip_range	IP address range of k8s pods	string	"10.1.0.0/16"	no
project_id	GCP project id	any	n/a	yes
region	region	string	"us-east1"	no
service_ip_range	IP address range of k8s services	string	"10.2.0.0/16"	no

Outputs

Name	Description
kubernetes_cluster_host	GKE Cluster Host
kubernetes_cluster_name	GKE Cluster Name
region	GCloud Region

Cleanup

To destroy the created resources run the following command:

terraform destroy

Notes

• The configuration uses minimal resources to stay within GCP's free tier
• The cluster is deployed in a single zone for cost optimization
• Remember to monitor your GCP usage and costs