variable "eks_cluster_name" {}
variable "region" {}
variable "instance_type" {
  default = "m5.large"
}
variable "workers_additional_policies" {
  default = []
}
variable "sys_worker_group_name" {}
variable "sys_instance_type" {}
variable "sys_asg_capacity" {}
variable "sys_kubelet_args" {}
variable "infra_worker_group_name" {}
variable "infra_instance_type" {}
variable "infra_asg_min_size" {}
variable "infra_asg_max_size" {}
variable "infra_kubelet_args" {}
variable "infra_spot_price" {}


data "aws_availability_zones" "available" {}

module "vpc" {
  source  = "terraform-aws-modules/vpc/aws"
  version = "2.21.0"

  name                 = "ekstf-vpc"
  cidr                 = "192.168.0.0/16"
  azs                  = data.aws_availability_zones.available.names
  private_subnets      = ["192.168.160.0/19", "192.168.128.0/19", "192.168.96.0/19"]
  public_subnets       = ["192.168.64.0/19", "192.168.32.0/19", "192.168.0.0/19"]
  enable_nat_gateway   = true
  single_nat_gateway   = true
  enable_dns_hostnames = true

  tags = {
    "kubernetes.io/cluster/${var.eks_cluster_name}" = "shared",
  }

  public_subnet_tags = {
    "kubernetes.io/cluster/${var.eks_cluster_name}" = "shared"
    "kubernetes.io/role/elb"                        = "1"
  }

  private_subnet_tags = {
    "kubernetes.io/cluster/${var.eks_cluster_name}" = "shared"
    "kubernetes.io/role/internal-elb"               = "1"
  }
}

module "eks" {
  source       = "terraform-aws-modules/eks/aws"
  cluster_name = var.eks_cluster_name
  cluster_version = "1.16"
  subnets      = module.vpc.private_subnets
  vpc_id       = module.vpc.vpc_id

  workers_additional_policies = var.workers_additional_policies

  worker_groups = [
    {
      name                 = var.sys_worker_group_name
      instance_type        = var.sys_instance_type
      asg_desired_capacity = var.sys_asg_capacity
      kubelet_extra_args   = var.sys_kubelet_args
      suspended_processes  = ["AZRebalance"]
    },
    {
      name                 = var.infra_worker_group_name
      instance_type        = var.infra_instance_type
      asg_min_size         = var.infra_asg_min_size
      asg_max_size         = var.infra_asg_max_size
      kubelet_extra_args   = var.infra_kubelet_args
      suspended_processes  = ["AZRebalance"]
      spot_price           = var.infra_spot_price
    }
  ]
}