nanochat/terraform/modules/eks/main.tf

terraform {
  required_version = ">= 1.5.0"
  required_providers {
    aws = {
      source  = "hashicorp/aws"
      version = ">= 5.0"
    }
  }
}

data "aws_ssm_parameter" "eks_ami_id" {
  name = "/aws/service/eks/optimized-ami/${var.cluster_version}/amazon-linux-2/recommended/image_id"
}

module "eks" {
  source  = "terraform-aws-modules/eks/aws"
  version = "~> 20.0"

  cluster_name    = var.cluster_name
  cluster_version = var.cluster_version

  cluster_endpoint_public_access  = true
  cluster_endpoint_private_access = true

  enable_irsa = true

  vpc_id                   = var.vpc_id
  subnet_ids               = var.private_subnet_ids
  control_plane_subnet_ids = var.private_subnet_ids

  cluster_addons = {
    coredns                = { most_recent = true }
    kube-proxy             = { most_recent = true }
    vpc-cni                = { most_recent = true }
    aws-ebs-csi-driver     = { most_recent = true }
    aws-efs-csi-driver     = { most_recent = true }
  }

  eks_managed_node_group_defaults = {
    ami_id                     = data.aws_ssm_parameter.eks_ami_id.value
    enable_bootstrap_user_data = true
  }

  eks_managed_node_groups = {
    default = {
      min_size     = var.node_min_size
      max_size     = var.node_max_size
      desired_size = var.node_desired_size

      instance_types = [var.node_instance_type]
      capacity_type  = "ON_DEMAND"

      update_config = {
        max_unavailable_percentage = var.node_max_unavailable_percentage
      }

      labels = {
        role = "general"
      }
    }
  }

  tags = var.tags
}