{ ... }:
{
  service = [
    {
      service_description = "Postgresql replication for backup-2 is up to date";
      use = "local-service";
      check_command = ["check_postgresql_replication" "backup-2" "/run/postgresql" "5432"];
    }
    {
      service_description = "mailq is empty";
      use = "local-service";
      check_command = ["check_mailq"];
    }
  ];
}