77 lines
2.8 KiB
Python
77 lines
2.8 KiB
Python
# Copyright (c) 2013 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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import sqlalchemy as sa
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from sqlalchemy import orm
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from neutron.db import model_base
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from neutron.db import models_v2
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from neutron.extensions import portbindings
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BINDING_PROFILE_LEN = 4095
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class NetworkSegment(model_base.BASEV2, models_v2.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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__tablename__ = 'ml2_network_segments'
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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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class PortBinding(model_base.BASEV2):
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"""Represent binding-related state of a port.
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A port binding stores the port attributes required for the
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portbindings extension, as well as internal ml2 state such as
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which MechanismDriver and which segment are used by the port
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binding.
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"""
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__tablename__ = 'ml2_port_bindings'
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port_id = sa.Column(sa.String(36),
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sa.ForeignKey('ports.id', ondelete="CASCADE"),
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primary_key=True)
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host = sa.Column(sa.String(255), nullable=False, default='')
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vnic_type = sa.Column(sa.String(64), nullable=False,
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default=portbindings.VNIC_NORMAL)
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profile = sa.Column(sa.String(BINDING_PROFILE_LEN), nullable=False,
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default='')
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vif_type = sa.Column(sa.String(64), nullable=False)
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vif_details = sa.Column(sa.String(4095), nullable=False, default='')
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driver = sa.Column(sa.String(64))
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segment = sa.Column(sa.String(36),
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sa.ForeignKey('ml2_network_segments.id',
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ondelete="SET NULL"))
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# Add a relationship to the Port model in order to instruct SQLAlchemy to
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# eagerly load port bindings
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port = orm.relationship(
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models_v2.Port,
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backref=orm.backref("port_binding",
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lazy='joined', uselist=False,
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cascade='delete'))
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