83 lines
3.4 KiB
Python
83 lines
3.4 KiB
Python
# Copyright 2015 Red Hat Inc.
|
|
#
|
|
# 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.
|
|
|
|
from oslo_serialization import jsonutils
|
|
from oslo_utils import versionutils
|
|
|
|
from nova import db
|
|
from nova import exception
|
|
from nova.objects import base
|
|
from nova.objects import fields
|
|
|
|
|
|
@base.NovaObjectRegistry.register
|
|
class MigrationContext(base.NovaPersistentObject, base.NovaObject):
|
|
"""Data representing additional resources related to a migration.
|
|
|
|
Some resources cannot be calculated from knowing the flavor alone for the
|
|
purpose of resources tracking, but need to be persisted at the time the
|
|
claim was made, for subsequent resource tracking runs to be consistent.
|
|
MigrationContext objects are created when the claim is done and are there
|
|
to facilitate resource tracking and final provisioning of the instance on
|
|
the destination host.
|
|
"""
|
|
|
|
# Version 1.0: Initial version
|
|
# Version 1.1: Add old/new pci_devices and pci_requests
|
|
VERSION = '1.1'
|
|
|
|
fields = {
|
|
'instance_uuid': fields.UUIDField(),
|
|
'migration_id': fields.IntegerField(),
|
|
'new_numa_topology': fields.ObjectField('InstanceNUMATopology',
|
|
nullable=True),
|
|
'old_numa_topology': fields.ObjectField('InstanceNUMATopology',
|
|
nullable=True),
|
|
'new_pci_devices': fields.ObjectField('PciDeviceList',
|
|
nullable=True),
|
|
'old_pci_devices': fields.ObjectField('PciDeviceList',
|
|
nullable=True),
|
|
'new_pci_requests': fields.ObjectField('InstancePCIRequests',
|
|
nullable=True),
|
|
'old_pci_requests': fields.ObjectField('InstancePCIRequests',
|
|
nullable=True),
|
|
}
|
|
|
|
@classmethod
|
|
def obj_make_compatible(cls, primitive, target_version):
|
|
target_version = versionutils.convert_version_to_tuple(target_version)
|
|
if target_version < (1, 1):
|
|
primitive.pop('old_pci_devices', None)
|
|
primitive.pop('new_pci_devices', None)
|
|
primitive.pop('old_pci_requests', None)
|
|
primitive.pop('new_pci_requests', None)
|
|
|
|
@classmethod
|
|
def obj_from_db_obj(cls, db_obj):
|
|
primitive = jsonutils.loads(db_obj)
|
|
return cls.obj_from_primitive(primitive)
|
|
|
|
@base.remotable_classmethod
|
|
def get_by_instance_uuid(cls, context, instance_uuid):
|
|
db_extra = db.instance_extra_get_by_instance_uuid(
|
|
context, instance_uuid, columns=['migration_context'])
|
|
if not db_extra:
|
|
raise exception.MigrationContextNotFound(
|
|
instance_uuid=instance_uuid)
|
|
|
|
if db_extra['migration_context'] is None:
|
|
return None
|
|
|
|
return cls.obj_from_db_obj(db_extra['migration_context'])
|