#############################
# VARs
#############################

locals {
  cluster_name = "${var.project_name}-${var.stage}-eks"
  vpc_name     = "${var.project_name}-${var.stage}-vpc"
}

# Filter out local zones, which are not currently supported 
# with managed node groups
data "aws_availability_zones" "available" {
  filter {
    name   = "opt-in-status"
    values = ["opt-in-not-required"]
  }
}


#############################
# Providers
#############################

provider "aws" {
  region = var.region

  default_tags {
    tags = {
      Environment = var.stage
      Project     = "web-crawler-on-eks"
    }
  }
}

#############################
# VPC
#############################

module "vpc" {
  source  = "terraform-aws-modules/vpc/aws"
  version = "5.8.1"

  name = local.vpc_name

  cidr = "10.0.0.0/16"
  azs  = slice(data.aws_availability_zones.available.names, 0, 3)

  private_subnets = ["10.0.1.0/24", "10.0.2.0/24", "10.0.3.0/24"]
  public_subnets  = ["10.0.4.0/24", "10.0.5.0/24", "10.0.6.0/24"]

  enable_nat_gateway   = true
  single_nat_gateway   = true
  enable_dns_hostnames = true

  public_subnet_tags = {
    "kubernetes.io/role/elb" = 1
  }

  private_subnet_tags = {
    "kubernetes.io/role/internal-elb" = 1
  }
}