RETIRED, Tricircle is to provide networking automation across Neutron.
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tricircle/tricircle/network/managers.py

109 lines
4.3 KiB

# Copyright 2015 Huawei Technologies Co., Ltd.
# All Rights Reserved
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
from oslo_config import cfg
from oslo_log import log
from neutron.api.v2 import attributes
from neutron.extensions import external_net
from neutron.plugins.ml2 import managers
from tricircle.common.i18n import _LE
from tricircle.common.i18n import _LI
LOG = log.getLogger(__name__)
class TricircleTypeManager(managers.TypeManager):
def __init__(self):
self.drivers = {}
# NOTE(zhiyuan) here we call __init__ of super class's super class,
# which is NamedExtensionManager's __init__ to bypass initialization
# process of ml2 type manager
super(managers.TypeManager, self).__init__(
'tricircle.network.type_drivers',
cfg.CONF.tricircle.type_drivers,
invoke_on_load=True)
LOG.info(_LI('Loaded type driver names: %s'), self.names())
self._register_types()
self._check_tenant_network_types(
cfg.CONF.tricircle.tenant_network_types)
self._check_bridge_network_type(
cfg.CONF.tricircle.bridge_network_type)
def _check_bridge_network_type(self, bridge_network_type):
if not bridge_network_type:
return
if bridge_network_type == 'local':
LOG.error(_LE("Local is not a valid bridge network type. "
"Service terminated!"), bridge_network_type)
raise SystemExit(1)
type_set = set(self.tenant_network_types)
if bridge_network_type not in type_set:
LOG.error(_LE("Bridge network type %s is not registered. "
"Service terminated!"), bridge_network_type)
raise SystemExit(1)
def _register_types(self):
for ext in self:
network_type = ext.obj.get_type()
if network_type not in self.drivers:
self.drivers[network_type] = ext
@staticmethod
def _is_external_network(network):
external = network.get(external_net.EXTERNAL)
external_set = attributes.is_attr_set(external)
if not external_set or not external:
return False
else:
return True
def create_network_segments(self, context, network, tenant_id):
# NOTE(zhiyuan) before we figure out how to deal with external network
# segment allocation, skip segment creation for external network
if self._is_external_network(network):
return
segments = self._process_provider_create(network)
session = context.session
mtu = []
with session.begin(subtransactions=True):
network_id = network['id']
if segments:
for segment_index, segment in enumerate(segments):
segment = self.reserve_provider_segment(
session, segment)
self._add_network_segment(context, network_id, segment,
mtu, segment_index)
else:
segment = self._allocate_tenant_net_segment(session)
self._add_network_segment(context, network_id, segment, mtu)
def extend_networks_dict_provider(self, context, networks):
internal_networks = []
for network in networks:
# NOTE(zhiyuan) before we figure out how to deal with external
# network segment allocation, skip external network since it does
# not have segment information
if not self._is_external_network(network):
internal_networks.append(network)
if internal_networks:
super(TricircleTypeManager,
self).extend_networks_dict_provider(context,
internal_networks)