terraform-aws-observability-accelerator/examples/vpc/vpc.tf

module "vpc" {
  source  = "terraform-aws-modules/vpc/aws"
  version = "~> 3.0"

  name = local.name
  cidr = local.vpc_cidr

  azs             = local.azs
  public_subnets  = [for k, v in local.azs : cidrsubnet(local.vpc_cidr, 8, k)]
  private_subnets = [for k, v in local.azs : cidrsubnet(local.vpc_cidr, 8, k + 10)]

  enable_nat_gateway   = true
  single_nat_gateway   = true
  enable_dns_hostnames = true

  # Manage so we can name
  manage_default_network_acl    = true
  default_network_acl_tags      = { Name = "${local.name}-default" }
  manage_default_route_table    = true
  default_route_table_tags      = { Name = "${local.name}-default" }
  manage_default_security_group = true
  default_security_group_tags   = { Name = "${local.name}-default" }

  public_subnet_tags = {
    "kubernetes.io/cluster/${local.name}" = "shared"
    "kubernetes.io/role/elb"              = 1
  }

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

  tags = local.tags
}