OpenStack Networking (Neutron)
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# Copyright (c) 2013 OpenStack Foundation
# 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 neutron_lib import constants as p_const
from neutron_lib import exceptions as exc
from neutron_lib.plugins.ml2 import api
from oslo_log import log
from neutron._i18n import _
LOG = log.getLogger(__name__)
class LocalTypeDriver(api.ML2TypeDriver):
"""Manage state for local networks with ML2.
The LocalTypeDriver implements the 'local' network_type. Local
network segments provide connectivity between VMs and other
devices running on the same node, provided that a common local
network bridging technology is available to those devices. Local
network segments do not provide any connectivity between nodes.
"""
def __init__(self):
LOG.info("ML2 LocalTypeDriver initialization complete")
def get_type(self):
return p_const.TYPE_LOCAL
def initialize(self):
pass
def is_partial_segment(self, segment):
return False
def validate_provider_segment(self, segment):
for key, value in segment.items():
if value and key != api.NETWORK_TYPE:
msg = _("%s prohibited for local provider network") % key
raise exc.InvalidInput(error_message=msg)
def reserve_provider_segment(self, context, segment):
# No resources to reserve
return segment
def allocate_tenant_segment(self, context):
# No resources to allocate
return {api.NETWORK_TYPE: p_const.TYPE_LOCAL}
def release_segment(self, context, segment):
# No resources to release
pass
def get_mtu(self, physical_network=None):
pass