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# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import os
from oslo_utils.fixture import uuidsentinel as uuids
from oslo_utils import uuidutils
from nova import context
from nova import exception
from nova import objects
from nova import test
from nova.tests import fixtures as nova_fixtures
class ConnectionSwitchTestCase(test.NoDBTestCase):
USES_DB_SELF = True
test_filename = 'foo.db'
fake_conn = 'sqlite:///' + test_filename
def setUp(self):
super(ConnectionSwitchTestCase, self).setUp()
self.addCleanup(self.cleanup)
self.useFixture(nova_fixtures.Database(database='api'))
self.useFixture(nova_fixtures.Database(database='main'))
# Use a file-based sqlite database so data will persist across new
# connections
# The 'main' database connection will stay open, so in-memory is fine
self.useFixture(nova_fixtures.Database(connection=self.fake_conn))
def cleanup(self):
try:
os.remove(self.test_filename)
except OSError:
pass
def test_connection_switch(self):
ctxt = context.RequestContext('fake-user', 'fake-project')
# Make a request context with a cell mapping
mapping = objects.CellMapping(context=ctxt,
uuid=uuidutils.generate_uuid(),
database_connection=self.fake_conn,
transport_url='none:///')
mapping.create()
# Create an instance in the cell database
uuid = uuidutils.generate_uuid()
with context.target_cell(ctxt, mapping) as cctxt:
# Must set project_id because instance get specifies
# project_only=True to model_query, which means non-admin
# users can only read instances for their project
instance = objects.Instance(context=cctxt, uuid=uuid,
project_id='fake-project')
instance.create()
# Verify the instance is found in the cell database
inst = objects.Instance.get_by_uuid(cctxt, uuid)
self.assertEqual(uuid, inst.uuid)
# Verify the instance isn't found in the main database
self.assertRaises(exception.InstanceNotFound,
objects.Instance.get_by_uuid, ctxt, uuid)
class CellDatabasesTestCase(test.NoDBTestCase):
USES_DB_SELF = True
def setUp(self):
super(CellDatabasesTestCase, self).setUp()
self.useFixture(nova_fixtures.Database(database='api'))
fix = nova_fixtures.CellDatabases()
fix.add_cell_database('cell0')
fix.add_cell_database('cell1')
fix.add_cell_database('cell2')
self.useFixture(fix)
self.context = context.RequestContext('fake-user', 'fake-project')
def _create_cell_mappings(self):
cell0_uuid = objects.CellMapping.CELL0_UUID
self.mapping0 = objects.CellMapping(context=self.context,
uuid=cell0_uuid,
database_connection='cell0',
transport_url='none:///')
self.mapping1 = objects.CellMapping(context=self.context,
uuid=uuidutils.generate_uuid(),
database_connection='cell1',
transport_url='none:///')
self.mapping2 = objects.CellMapping(context=self.context,
uuid=uuidutils.generate_uuid(),
database_connection='cell2',
transport_url='none:///')
self.mapping0.create()
self.mapping1.create()
self.mapping2.create()
def test_cell_dbs(self):
self._create_cell_mappings()
# Create an instance and read it from cell1
uuid = uuidutils.generate_uuid()
with context.target_cell(self.context, self.mapping1) as cctxt:
instance = objects.Instance(context=cctxt, uuid=uuid,
project_id='fake-project')
instance.create()
inst = objects.Instance.get_by_uuid(cctxt, uuid)
self.assertEqual(uuid, inst.uuid)
# Make sure it can't be read from cell2
with context.target_cell(self.context, self.mapping2) as cctxt:
self.assertRaises(exception.InstanceNotFound,
objects.Instance.get_by_uuid, cctxt, uuid)
# Make sure it can still be read from cell1
with context.target_cell(self.context, self.mapping1) as cctxt:
inst = objects.Instance.get_by_uuid(cctxt, uuid)
self.assertEqual(uuid, inst.uuid)
# Create an instance and read it from cell2
uuid = uuidutils.generate_uuid()
with context.target_cell(self.context, self.mapping2) as cctxt:
instance = objects.Instance(context=cctxt, uuid=uuid,
project_id='fake-project')
instance.create()
inst = objects.Instance.get_by_uuid(cctxt, uuid)
self.assertEqual(uuid, inst.uuid)
# Make sure it can't be read from cell1
with context.target_cell(self.context, self.mapping1) as cctxt:
self.assertRaises(exception.InstanceNotFound,
objects.Instance.get_by_uuid, cctxt, uuid)
def test_scatter_gather_cells(self):
self._create_cell_mappings()
# Create an instance in cell0
with context.target_cell(self.context, self.mapping0) as cctxt:
instance = objects.Instance(context=cctxt, uuid=uuids.instance0,
project_id='fake-project')
instance.create()
# Create an instance in first cell
with context.target_cell(self.context, self.mapping1) as cctxt:
instance = objects.Instance(context=cctxt, uuid=uuids.instance1,
project_id='fake-project')
instance.create()
# Create an instance in second cell
with context.target_cell(self.context, self.mapping2) as cctxt:
instance = objects.Instance(context=cctxt, uuid=uuids.instance2,
project_id='fake-project')
instance.create()
filters = {'deleted': False, 'project_id': 'fake-project'}
results = context.scatter_gather_all_cells(
self.context, objects.InstanceList.get_by_filters, filters,
sort_dir='asc')
instances = objects.InstanceList()
for result in results.values():
instances = instances + result
# Should have 3 instances across cells
self.assertEqual(3, len(instances))
# Verify we skip cell0 when specified
results = context.scatter_gather_skip_cell0(
self.context, objects.InstanceList.get_by_filters, filters)
instances = objects.InstanceList()
for result in results.values():
instances = instances + result
# Should have gotten only the instances from the last two cells
self.assertEqual(2, len(instances))
self.assertIn(self.mapping1.uuid, results)
self.assertIn(self.mapping2.uuid, results)
instance_uuids = [inst.uuid for inst in instances]
self.assertIn(uuids.instance1, instance_uuids)
self.assertIn(uuids.instance2, instance_uuids)
# Try passing one cell
results = context.scatter_gather_cells(
self.context, [self.mapping1], 60,
objects.InstanceList.get_by_filters, filters)
instances = objects.InstanceList()
for result in results.values():
instances = instances + result
# Should have gotten only one instance from cell1
self.assertEqual(1, len(instances))
self.assertIn(self.mapping1.uuid, results)
self.assertEqual(uuids.instance1, instances[0].uuid)
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