72 lines
3.0 KiB
Python
72 lines
3.0 KiB
Python
# Copyright 2015 OpenStack LLC.
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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 model_base
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import sqlalchemy as sa
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from sqlalchemy import orm as sa_orm
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# Database models used by the neutron DB IPAM driver
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# NOTE(salv-orlando): The following data model creates redundancy with
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# models_v2.IPAllocationPool. This level of data redundancy could be tolerated
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# considering that the following model is specific to the IPAM driver logic.
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# It therefore represents an internal representation of a subnet allocation
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# pool and can therefore change in the future, where as
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# models_v2.IPAllocationPool is the representation of IP allocation pools in
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# the management layer and therefore its evolution is subject to APIs backward
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# compatibility policies
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class IpamAllocationPool(model_base.BASEV2, model_base.HasId):
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"""Representation of an allocation pool in a Neutron subnet."""
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ipam_subnet_id = sa.Column(sa.String(36),
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sa.ForeignKey('ipamsubnets.id',
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ondelete="CASCADE"),
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nullable=False)
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first_ip = sa.Column(sa.String(64), nullable=False)
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last_ip = sa.Column(sa.String(64), nullable=False)
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def __repr__(self):
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return "%s - %s" % (self.first_ip, self.last_ip)
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class IpamSubnet(model_base.BASEV2, model_base.HasId):
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"""Association between IPAM entities and neutron subnets.
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For subnet data persistency - such as cidr and gateway IP, the IPAM
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driver relies on Neutron's subnet model as source of truth to limit
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data redundancy.
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"""
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neutron_subnet_id = sa.Column(sa.String(36),
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nullable=True)
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allocation_pools = sa_orm.relationship(IpamAllocationPool,
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backref='subnet',
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lazy="joined",
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cascade='delete')
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class IpamAllocation(model_base.BASEV2):
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"""Model class for IP Allocation requests. """
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ip_address = sa.Column(sa.String(64), nullable=False, primary_key=True)
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status = sa.Column(sa.String(36))
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# The subnet identifier is redundant but come handy for looking up
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# IP addresses to remove.
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ipam_subnet_id = sa.Column(sa.String(36),
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sa.ForeignKey('ipamsubnets.id',
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ondelete="CASCADE"),
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primary_key=True,
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nullable=False)
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