Terraform AWS VPC + EKS Cluster

This project provisions an Amazon VPC and an Amazon Elastic Kubernetes Service (EKS) cluster using official Terraform community modules.

📖 Notes

Ensure your AWS profile is configured with proper IAM permissions.

The VPC is tagged for Kubernetes LoadBalancer support.

By default, this setup creates 2 managed node groups across 2 private subnets.

Modify variables for scaling, spot instances, or HA requirements.

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💰 Costs

• EKS control plane: ~$0.10 USD/hour
• Extra costs: EC2 worker nodes, NAT Gateways, and Load Balancers (ALB/NLB) are billed separately.
• ⚠️ Note: NAT Gateways and Load Balancers can significantly increase monthly costs. Always clean up resources when not in use.

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📦 Requirements

• Terraform >= 0.12
• AWS CLI with a configured profile
• An AWS account with sufficient permissions
• kubectl to interact with the EKS cluster

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⚙️ Modules Used

• terraform-aws-modules/vpc/aws
• terraform-aws-modules/eks/aws

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📂 Project Structure

• VPC module: Creates VPC, subnets (public + private), NAT gateways, and tags for Kubernetes.
• EKS module: Creates EKS cluster, managed node groups, and applies networking/security settings.
• Security Groups: Allows worker node management (SSH access limited to private CIDRs).
• Kubernetes Provider: Automatically configures kubeconfig for access.

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🚀 Usage

1. Clone the repository (or copy files locally).

2. Initialize Terraform (downloads providers and modules):

   terraform init
   

3. Terraform Plan

      terraform plan -var="region=eu-central-1" -var="cluster_name=my-eks" -var="instance_class=t3.medium"
   

4. Create

      terraform apply -auto-approve -var="region=eu-central-1" -var="cluster_name=my-eks" -var="instance_class=t3.medium"
   
   

5. 🧹 Cleanup To destroy all resources (to avoid costs):

      terraform destroy -auto-approve