def _ipam_get_subnets(self, context, network_id, host, service_type=None, fixed_configured=False): """Return eligible subnets If no eligible subnets are found, determine why and potentially raise an appropriate error. """ subnets = self._find_candidate_subnets(context, network_id, host, service_type, fixed_configured) if subnets: subnet_dicts = [ self._make_subnet_dict(subnet, context=context) for subnet in subnets ] # Give priority to subnets with service_types return sorted(subnet_dicts, key=lambda subnet: not subnet.get('service_types')) # Determine why we found no subnets to raise the right error query = self._query_subnets_on_network(context, network_id) if self.is_host_set(host): # Empty because host isn't mapped to a segment with a subnet? s_query = query.filter(models_v2.Subnet.segment_id.isnot(None)) if s_query.limit(1).count() != 0: # It is a routed network but no subnets found for host raise segment_exc.HostNotConnectedToAnySegment( host=host, network_id=network_id) if not query.limit(1).count(): # Network has *no* subnets of any kind. This isn't an error. return [] # Does filtering ineligible service subnets makes the list empty? query = self._query_filter_service_subnets(query, service_type) if query.limit(1).count(): # No, must be a deferred IP port because there are matching # subnets. Happens on routed networks when host isn't known. raise ipam_exceptions.DeferIpam() raise ipam_exceptions.IpAddressGenerationFailureNoMatchingSubnet( network_id=network_id, service_type=service_type)
def network_has_no_subnet(cls, context, network_id, host, service_type): # Determine why we found no subnets to raise the right error query = cls.query_subnets_on_network(context, network_id) if cls.is_host_set(host): # Empty because host isn't mapped to a segment with a subnet? s_query = query.filter(cls.db_model.segment_id.isnot(None)) if s_query.limit(1).count() != 0: # It is a routed network but no subnets found for host raise segment_exc.HostNotConnectedToAnySegment( host=host, network_id=network_id) if not query.limit(1).count(): # Network has *no* subnets of any kind. This isn't an error. return True # Does filtering ineligible service subnets makes the list empty? query = SubnetServiceType.query_filter_service_subnets( query, service_type) if query.limit(1).count(): # No, must be a deferred IP port because there are matching # subnets. Happens on routed networks when host isn't known. raise ipam_exceptions.DeferIpam() return False