def create_target_if_needed(session, logger, target, dbdns_env):
"""
Create FQDNs in restricted domains.
This is used to allow pointing CNAME and PTR records to DNS domains we
otherwise don't manage.
"""
name, dbtarget_domain = parse_fqdn(session, target)
dbtarget_domain.lock_row()
q = session.query(Fqdn)
q = q.filter_by(dns_environment=dbdns_env)
q = q.filter_by(dns_domain=dbtarget_domain)
q = q.filter_by(name=name)
try:
dbtarget = q.one()
except NoResultFound:
if not dbtarget_domain.restricted:
raise NotFoundException(
"Target FQDN {0} does not exist in {1:l}.".format(
target, dbdns_env))
dbtarget = Fqdn(name=name,
dns_domain=dbtarget_domain,
dns_environment=dbdns_env)
try:
socket.gethostbyname(dbtarget.fqdn)
except socket.gaierror, e:
logger.warning("WARNING: Will create a reference to {0.fqdn!s}, "
"but trying to resolve it resulted in an error: "
"{1.strerror}.".format(dbtarget, e))
session.add(dbtarget)
dbtarget_rec = ReservedName(fqdn=dbtarget)
session.add(dbtarget_rec)
