77 lines
3.2 KiB
Python
77 lines
3.2 KiB
Python
# Copyright 2016 Hewlett Packard Enterprise Development, LP
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#
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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 neutron_lib.db import constants as db_const
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from neutron_lib.db import model_base
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import sqlalchemy as sa
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from sqlalchemy import orm
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from neutron.db import models_v2
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from neutron.db import standard_attr
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from neutron.extensions import segment
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# Some standalone plugins need a DB table to store provider
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# network information. Initially there was no such table,
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# but in Mitaka the ML2 NetworkSegment table was promoted here.
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class NetworkSegment(standard_attr.HasStandardAttributes,
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model_base.BASEV2, model_base.HasId):
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"""Represent persistent state of a network segment.
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A network segment is a portion of a neutron network with a
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specific physical realization. A neutron network can consist of
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one or more segments.
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"""
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network_id = sa.Column(sa.String(36),
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sa.ForeignKey('networks.id', ondelete="CASCADE"),
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nullable=False)
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network_type = sa.Column(sa.String(32), nullable=False)
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physical_network = sa.Column(sa.String(64))
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segmentation_id = sa.Column(sa.Integer)
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is_dynamic = sa.Column(sa.Boolean, default=False, nullable=False,
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server_default=sa.sql.false())
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segment_index = sa.Column(sa.Integer, nullable=False, server_default='0')
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name = sa.Column(sa.String(db_const.NAME_FIELD_SIZE),
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nullable=True)
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network = orm.relationship(models_v2.Network,
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backref=orm.backref("segments",
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lazy='subquery',
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cascade='delete'))
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api_collections = [segment.SEGMENTS]
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class SegmentHostMapping(model_base.BASEV2):
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segment_id = sa.Column(sa.String(36),
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sa.ForeignKey('networksegments.id',
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ondelete="CASCADE"),
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primary_key=True,
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index=True,
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nullable=False)
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host = sa.Column(sa.String(255),
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primary_key=True,
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index=True,
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nullable=False)
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# Add a relationship to the NetworkSegment model in order to instruct
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# SQLAlchemy to eagerly load this association
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network_segment = orm.relationship(
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NetworkSegment, backref=orm.backref("segment_host_mapping",
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lazy='subquery',
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cascade='delete'))
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revises_on_change = ('network_segment', )
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