GCP DNS mass creation with Terraform

main.tf

locals {
  # the default is important in case you need it elsewhere (it points to the first zone created)
  dns_default_zone = "my-dns-zone"
  dns_default_fqdn = "${local.dns_default_zone}.${data.google_dns_managed_zone.parent[local.dns_default_zone].dns_name}"
  dns_zones = {
    "${local.dns_default_zone}" = {
      parent_zone_name = "my-parent-dns-zone"
    }
  }
}


data "google_dns_managed_zone" "parent" {
  for_each = local.dns_zones
  name     = each.value.parent_zone_name
}

resource "google_dns_managed_zone" "this" {
  for_each = local.dns_zones
  name     = "${each.key}-dns"
  dns_name = "${each.key}.${data.google_dns_managed_zone.parent[each.key].dns_name}"

  dnssec_config {
    state = on
  }

  # Set this true to delete all records in the zone.
  force_destroy = true
}

# ## this is required to register the NS records on the parent zone
resource "google_dns_record_set" "parent_ns" {
  for_each = local.dns_zones
  managed_zone = data.google_dns_managed_zone.parent[each.key].name
  project      = data.google_dns_managed_zone.parent[each.key].project

  name    = "${each.key}.${data.google_dns_managed_zone.parent[each.key].dns_name}"
  type    = "NS"
  ttl     = 300
  rrdatas = google_dns_managed_zone.this[each.key].name_servers
}