a984f9554c
Today, existing networks may not reflect MTU configured for
neutron-server, if they were created when neutron-server was using
different MTU setup for its infrastructure, or when it was using bad
default values for network MTUs (specifically, before Mitaka, all networks
were getting MTU = 0 by default, disabling both advertisement and data
path MTU size enforcement).
This patch stops persisting MTU in the database on network create and
instead calculate it on every network resource fetch.
DocImpact Now changes to MTU configuration options immediately affect
existing network MTUs, not just new networks.
UpgradeImpact Existing networks with invalid MTU persisted in database
may change their MTU values to reflect configuration.
Change-Id: Iee4f5037bf10b73ba98464143b183aacb59c22f2
Closes-Bug: #1556182
41 lines
1.6 KiB
Python
41 lines
1.6 KiB
Python
# Copyright (c) 2015 OpenStack Foundation.
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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from oslo_config import cfg
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from neutron.api.v2 import attributes
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from neutron.db import db_base_plugin_v2
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from neutron.extensions import netmtu
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from neutron.plugins.common import utils
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CONF = cfg.CONF
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# TODO(ihrachys): the class is not used in the tree; mixins are generally
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# discouraged these days, so maybe it's worth considering deprecation for the
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# class. Interested plugins would be able to ship it on their own, if they want
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# to stick to mixins, or implement the behaviour in another way.
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class Netmtu_db_mixin(object):
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"""Mixin class to add network MTU support to db_base_plugin_v2."""
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def _extend_network_dict_mtu(self, network_res, network_db):
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# don't use network_db argument since MTU is not persisted in database
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network_res[netmtu.MTU] = utils.get_deployment_physnet_mtu()
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return network_res
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db_base_plugin_v2.NeutronDbPluginV2.register_dict_extend_funcs(
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attributes.NETWORKS, ['_extend_network_dict_mtu'])
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