5730d87c26
Add L3 HA base classes on the plugin side. A new admin-only ha attribute is added to the API router resource. Conversion from or to HA router is possible. Each tenant gets a single network used for HA traffic. The tenant_id for that network is set to '' so that it isn't visible via the CLI or GUI. A new table is added to map a tenant to its HA network. Specific HA attributes are added to the extra router attributes table. Finally, each HA router gets a port on the HA network, per l3 agent it is scheduled on. A new table is added to track these bindings. A new table is added in order to track VRID allocations. DVR integration is not expected to work. Any issues will be reported as bugs and handled after the feature merges. Migrating a router to HA or from HA works server side but is not expected to work (Yet) agent side. This will be dealt with as a bug in the future. DocImpact Partially-implements: blueprint l3-high-availability Change-Id: I9d935cf5e0c231e8cb7af5f61b9a9fc552c3521e Co-Authored-By: Assaf Muller <amuller@redhat.com>
88 lines
3.6 KiB
Python
88 lines
3.6 KiB
Python
# Copyright (c) 2014 OpenStack Foundation. 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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import sqlalchemy as sa
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from sqlalchemy import orm
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from neutron.db import db_base_plugin_v2
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from neutron.db import l3_db
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from neutron.db import model_base
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from neutron.extensions import l3
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class RouterExtraAttributes(model_base.BASEV2):
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"""Additional attributes for a Virtual Router."""
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# NOTE(armando-migliaccio): this model can be a good place to
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# add extension attributes to a Router model. Each case needs
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# to be individually examined, however 'distributed' and other
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# simple ones fit the pattern well.
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__tablename__ = "router_extra_attributes"
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router_id = sa.Column(sa.String(36),
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sa.ForeignKey('routers.id', ondelete="CASCADE"),
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primary_key=True)
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# Whether the router is a legacy (centralized) or a distributed one
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distributed = sa.Column(sa.Boolean, default=False,
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server_default=sa.sql.false(),
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nullable=False)
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# Whether the router is to be considered a 'service' router
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service_router = sa.Column(sa.Boolean, default=False,
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server_default=sa.sql.false(),
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nullable=False)
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ha = sa.Column(sa.Boolean, default=False,
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server_default=sa.sql.false(),
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nullable=False)
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ha_vr_id = sa.Column(sa.Integer())
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router = orm.relationship(
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l3_db.Router,
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backref=orm.backref("extra_attributes", lazy='joined',
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uselist=False, cascade='delete'))
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class ExtraAttributesMixin(object):
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"""Mixin class to enable router's extra attributes."""
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extra_attributes = []
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def _extend_extra_router_dict(self, router_res, router_db):
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extra_attrs = router_db['extra_attributes'] or {}
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for attr in self.extra_attributes:
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name = attr['name']
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default = attr['default']
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router_res[name] = (
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extra_attrs[name] if name in extra_attrs else default)
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def _get_extra_attributes(self, router, extra_attributes):
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return (dict((attr['name'],
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router.get(attr['name'], attr['default']))
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for attr in extra_attributes))
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def _process_extra_attr_router_create(
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self, context, router_db, router_req):
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kwargs = self._get_extra_attributes(router_req, self.extra_attributes)
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# extra_attributes reference is populated via backref
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if not router_db['extra_attributes']:
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attributes_db = RouterExtraAttributes(
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router_id=router_db['id'], **kwargs)
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context.session.add(attributes_db)
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router_db['extra_attributes'] = attributes_db
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else:
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# The record will exist if RouterExtraAttributes model's
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# attributes are added with db migrations over time
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router_db['extra_attributes'].update(kwargs)
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db_base_plugin_v2.NeutronDbPluginV2.register_dict_extend_funcs(
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l3.ROUTERS, ['_extend_extra_router_dict'])
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