a0594c643a
This is preliminary work towards moving instance creation until after scheduling. In order to do that we still need the ability to honor an instance show request. This does a lookup to determine if an instance is in a cell and if not it synthesizes an instance from the BuildRequest object that has been stored. If the instance is not mapped then the deployment has not migrated to their first cell yet and the instance lookup proceeds as usual. Until instance creation is moved to after scheduling this is mostly a noop. Honoring the instance list command will come later. Change-Id: Ib984c30543acb3ca9cb95fb53d44d9ded0f5a5c8 Partially-implements: bp add-buildrequest-obj Partially-implements: bp cells-scheduling-interaction
95 lines
3.6 KiB
Python
95 lines
3.6 KiB
Python
# 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 datetime
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from oslo_serialization import jsonutils
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from oslo_utils import uuidutils
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from nova import context
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from nova import objects
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from nova.objects import fields
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from nova.tests.unit import fake_block_device
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from nova.tests.unit import fake_instance
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from nova.tests import uuidsentinel as uuids
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def fake_db_req(**updates):
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ctxt = context.RequestContext('fake-user', 'fake-project')
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instance_uuid = uuidutils.generate_uuid()
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instance = fake_instance.fake_instance_obj(ctxt, objects.Instance,
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uuid=instance_uuid)
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# This will always be set this way for an instance at build time
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instance.host = None
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block_devices = objects.BlockDeviceMappingList(
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objects=[fake_block_device.fake_bdm_object(
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context,
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fake_block_device.FakeDbBlockDeviceDict(
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source_type='blank', destination_type='local',
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guest_format='foo', device_type='disk', disk_bus='',
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boot_index=1, device_name='xvda', delete_on_termination=False,
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snapshot_id=None, volume_id=None, volume_size=0,
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image_id='bar', no_device=False, connection_info=None,
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tag='', instance_uuid=uuids.instance))])
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db_build_request = {
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'id': 1,
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'project_id': 'fake-project',
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'instance_uuid': instance_uuid,
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'instance': jsonutils.dumps(instance.obj_to_primitive()),
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'block_device_mappings': jsonutils.dumps(
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block_devices.obj_to_primitive()),
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'created_at': datetime.datetime(2016, 1, 16),
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'updated_at': datetime.datetime(2016, 1, 16),
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}
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for name, field in objects.BuildRequest.fields.items():
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if name in db_build_request:
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continue
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if field.nullable:
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db_build_request[name] = None
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elif field.default != fields.UnspecifiedDefault:
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db_build_request[name] = field.default
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else:
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raise Exception('fake_db_req needs help with %s' % name)
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if updates:
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db_build_request.update(updates)
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return db_build_request
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def fake_req_obj(ctxt, db_req=None):
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if db_req is None:
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db_req = fake_db_req()
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req_obj = objects.BuildRequest(ctxt)
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for field in req_obj.fields:
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value = db_req[field]
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# create() can't be called if this is set
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if field == 'id':
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continue
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if isinstance(req_obj.fields[field], fields.ObjectField):
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value = value
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if field == 'instance':
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req_obj.instance = objects.Instance.obj_from_primitive(
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jsonutils.loads(value))
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elif field == 'block_device_mappings':
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req_obj.block_device_mappings = (
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objects.BlockDeviceMappingList.obj_from_primitive(
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jsonutils.loads(value)))
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elif field == 'instance_metadata':
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setattr(req_obj, field, jsonutils.loads(value))
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else:
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setattr(req_obj, field, value)
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# This should never be a changed field
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req_obj.obj_reset_changes(['id'])
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return req_obj
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