Add Host Mapping table to API Database
This patch creates the host_mappings table in the API database for cellsv2. This table will contain mapping of compute hosts to cells. Change-Id: I1bd35434ce186e1fb49d56c621bff3f09aa90138 Implements: blueprint cells-host-mapping
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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 migrate.changeset.constraint import ForeignKeyConstraint
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from migrate import UniqueConstraint
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from sqlalchemy import Column
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from sqlalchemy import DateTime
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from sqlalchemy import Index
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from sqlalchemy import Integer
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from sqlalchemy import MetaData
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from sqlalchemy import String
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from sqlalchemy import Table
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def upgrade(migrate_engine):
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meta = MetaData()
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meta.bind = migrate_engine
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cell_mappings = Table('cell_mappings', meta, autoload=True)
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host_mappings = Table('host_mappings', meta,
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Column('created_at', DateTime),
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Column('updated_at', DateTime),
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Column('id', Integer, primary_key=True, nullable=False),
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Column('cell_id', Integer, nullable=False),
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Column('host', String(length=255), nullable=False),
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UniqueConstraint('host',
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name='uniq_host_mappings0host'),
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Index('host_idx', 'host'),
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ForeignKeyConstraint(columns=['cell_id'],
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refcolumns=[cell_mappings.c.id]),
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mysql_engine='InnoDB',
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mysql_charset='utf8'
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)
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host_mappings.create(checkfirst=True)
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@ -56,3 +56,16 @@ class InstanceMapping(API_BASE):
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cell_id = Column(Integer, ForeignKey('cell_mappings.id'),
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nullable=False)
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project_id = Column(String(255), nullable=False)
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class HostMapping(API_BASE):
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"""Contains mapping of a compute host to which cell it is in"""
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__tablename__ = "host_mappings"
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__table_args__ = (Index('host_idx', 'host'),
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schema.UniqueConstraint('host',
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name='uniq_host_mappings0host'))
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id = Column(Integer, primary_key=True)
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cell_id = Column(Integer, ForeignKey('cell_mappings.id'),
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nullable=False)
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host = Column(String(255), nullable=False)
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@ -172,6 +172,22 @@ class NovaAPIMigrationsWalk(test_migrations.WalkVersionsMixin):
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self.assertEqual(['id'], fk['referred_columns'])
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self.assertEqual(['cell_id'], fk['constrained_columns'])
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def _check_003(self, engine, data):
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for column in ['created_at', 'updated_at', 'id',
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'cell_id', 'host']:
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self.assertColumnExists(engine, 'host_mappings', column)
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self.assertIndexExists(engine, 'host_mappings', 'host_idx')
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self.assertUniqueConstraintExists(engine, 'host_mappings',
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['host'])
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inspector = reflection.Inspector.from_engine(engine)
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# There should only be one foreign key here
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fk = inspector.get_foreign_keys('host_mappings')[0]
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self.assertEqual('cell_mappings', fk['referred_table'])
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self.assertEqual(['id'], fk['referred_columns'])
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self.assertEqual(['cell_id'], fk['constrained_columns'])
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class TestNovaAPIMigrationsWalkSQLite(NovaAPIMigrationsWalk,
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test_base.DbTestCase,
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