# VPC configuration with public and private subnets
module "vpc" {
source = "terraform-aws-modules/vpc/aws"
version = "~> 5.0"
name = "${var.project_name}-vpc"
cidr = var.vpc_cidr
azs = slice(data.aws_availability_zones.available.names, 0, 2)
private_subnets = [cidrsubnet(var.vpc_cidr, 4, 0), cidrsubnet(var.vpc_cidr, 4, 1)]
public_subnets = [cidrsubnet(var.vpc_cidr, 4, 2), cidrsubnet(var.vpc_cidr, 4, 3)]
enable_nat_gateway = true
single_nat_gateway = true # Cost optimization for test environment
enable_dns_hostnames = true
enable_dns_support = true
# Tags required for EKS
public_subnet_tags = {
"kubernetes.io/role/elb" = 1
"kubernetes.io/cluster/${var.project_name}" = "shared"
}
private_subnet_tags = {
"kubernetes.io/role/internal-elb" = 1
"kubernetes.io/cluster/${var.project_name}" = "shared"
}
tags = {
Name = "${var.project_name}-vpc"
}
}
