Terraform Infrastructure

Infrastructure as Code (IaC) for deploying Ciyex on AWS.

Directory Structure

kube-terraform/
├── modules/
│   ├── vpc/         # Networking (Subnets, NAT Gateway)
│   ├── eks/         # Kubernetes Cluster
│   ├── rds/         # PostgreSQL Database
│   ├── elastic/     # Elasticsearch/OpenSearch
│   └── s3/          # Storage Buckets
├── environments/
│   ├── dev/         # Development config
│   └── prod/        # Production config
└── main.tf          # Root module

Core Modules

VPC

Creates a secure network topology with Public/Private subnets across 3 Availability Zones.

module "vpc" {
  source = "../../modules/vpc"
  cidr_block = "10.0.0.0/16"
  environment = "prod"
}

EKS (Kubernetes)

Provisions the master control plane and worker node groups.

module "eks" {
  source = "../../modules/eks"
  cluster_name = "ciyex-prod"
  node_groups = {
    general = {
      instance_types = ["t3.large"]
      scaling_config = {
        min_size = 3
        max_size = 10
      }
    }
  }
}

RDS (Database)

Provisions Multi-AZ PostgreSQL 16.

module "rds" {
  source = "../../modules/rds"
  allocated_storage = 100
  instance_class = "db.t3.xlarge"
  multi_az = true
}

State Management

Terraform state is stored remotely in S3 with DynamoDB locking.

terraform {
  backend "s3" {
    bucket = "ciyex-terraform-state"
    key    = "prod/terraform.tfstate"
    region = "us-east-1"
    dynamodb_table = "terraform-locks"
  }
}

Applying Changes

1. Init: terraform init
2. Plan: terraform plan -var-file=environments/prod.tfvars
3. Apply: terraform apply -var-file=environments/prod.tfvars

Cost Estimation

Run infracost against the plan to see monthly estimates.