269 lines
11 KiB
Python
269 lines
11 KiB
Python
# Copyright 2013 IBM Corp.
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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 oslo_db import exception as db_exc
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from oslo_utils import uuidutils
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from oslo_utils import versionutils
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from nova.db import api as db
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from nova import exception
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from nova.i18n import _
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from nova import objects
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from nova.objects import base
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from nova.objects import fields
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def determine_migration_type(migration):
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if migration['old_instance_type_id'] != migration['new_instance_type_id']:
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return 'resize'
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else:
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return 'migration'
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# TODO(berrange): Remove NovaObjectDictCompat
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@base.NovaObjectRegistry.register
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class Migration(base.NovaPersistentObject, base.NovaObject,
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base.NovaObjectDictCompat):
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# Version 1.0: Initial version
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# Version 1.1: String attributes updated to support unicode
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# Version 1.2: Added migration_type and hidden
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# Version 1.3: Added get_by_id_and_instance()
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# Version 1.4: Added migration progress detail
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# Version 1.5: Added uuid
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# Version 1.6: Added cross_cell_move and get_by_uuid().
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# Version 1.7: Added user_id and project_id
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VERSION = '1.7'
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fields = {
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'id': fields.IntegerField(),
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'uuid': fields.UUIDField(),
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'source_compute': fields.StringField(nullable=True), # source hostname
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'dest_compute': fields.StringField(nullable=True), # dest hostname
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'source_node': fields.StringField(nullable=True), # source nodename
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'dest_node': fields.StringField(nullable=True), # dest nodename
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'dest_host': fields.StringField(nullable=True), # dest host IP
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'old_instance_type_id': fields.IntegerField(nullable=True),
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'new_instance_type_id': fields.IntegerField(nullable=True),
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'instance_uuid': fields.StringField(nullable=True),
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'status': fields.StringField(nullable=True),
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'migration_type': fields.MigrationTypeField(nullable=False),
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'hidden': fields.BooleanField(nullable=False, default=False),
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'memory_total': fields.IntegerField(nullable=True),
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'memory_processed': fields.IntegerField(nullable=True),
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'memory_remaining': fields.IntegerField(nullable=True),
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'disk_total': fields.IntegerField(nullable=True),
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'disk_processed': fields.IntegerField(nullable=True),
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'disk_remaining': fields.IntegerField(nullable=True),
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'cross_cell_move': fields.BooleanField(default=False),
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# request context user id
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'user_id': fields.StringField(nullable=True),
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# request context project id
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'project_id': fields.StringField(nullable=True),
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}
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@staticmethod
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def _from_db_object(context, migration, db_migration):
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for key in migration.fields:
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value = db_migration[key]
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if key == 'migration_type' and value is None:
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value = determine_migration_type(db_migration)
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elif key == 'uuid' and value is None:
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continue
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migration[key] = value
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migration._context = context
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migration.obj_reset_changes()
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migration._ensure_uuid()
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return migration
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def obj_make_compatible(self, primitive, target_version):
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super(Migration, self).obj_make_compatible(primitive, target_version)
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target_version = versionutils.convert_version_to_tuple(target_version)
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if target_version < (1, 2):
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if 'migration_type' in primitive:
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del primitive['migration_type']
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del primitive['hidden']
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if target_version < (1, 4):
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if 'memory_total' in primitive:
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del primitive['memory_total']
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del primitive['memory_processed']
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del primitive['memory_remaining']
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del primitive['disk_total']
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del primitive['disk_processed']
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del primitive['disk_remaining']
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if target_version < (1, 5):
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if 'uuid' in primitive:
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del primitive['uuid']
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if target_version < (1, 6) and 'cross_cell_move' in primitive:
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del primitive['cross_cell_move']
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if target_version < (1, 7):
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if 'user_id' in primitive:
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del primitive['user_id']
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if 'project_id' in primitive:
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del primitive['project_id']
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def obj_load_attr(self, attrname):
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if attrname == 'migration_type':
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# NOTE(danms): The only reason we'd need to load this is if
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# some older node sent us one. So, guess the type.
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self.migration_type = determine_migration_type(self)
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elif attrname in ['hidden', 'cross_cell_move']:
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self.obj_set_defaults(attrname)
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else:
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super(Migration, self).obj_load_attr(attrname)
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def _ensure_uuid(self):
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if 'uuid' in self:
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return
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self.uuid = uuidutils.generate_uuid()
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try:
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self.save()
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except db_exc.DBDuplicateEntry:
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# NOTE(danms) We raced to generate a uuid for this,
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# so fetch the winner and use that uuid
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fresh = self.__class__.get_by_id(self.context, self.id)
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self.uuid = fresh.uuid
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@base.remotable_classmethod
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def get_by_uuid(cls, context, migration_uuid):
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db_migration = db.migration_get_by_uuid(context, migration_uuid)
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return cls._from_db_object(context, cls(), db_migration)
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@base.remotable_classmethod
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def get_by_id(cls, context, migration_id):
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db_migration = db.migration_get(context, migration_id)
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return cls._from_db_object(context, cls(), db_migration)
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@base.remotable_classmethod
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def get_by_id_and_instance(cls, context, migration_id, instance_uuid):
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db_migration = db.migration_get_by_id_and_instance(
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context, migration_id, instance_uuid)
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return cls._from_db_object(context, cls(), db_migration)
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@base.remotable_classmethod
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def get_by_instance_and_status(cls, context, instance_uuid, status):
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db_migration = db.migration_get_by_instance_and_status(
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context, instance_uuid, status)
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return cls._from_db_object(context, cls(), db_migration)
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@base.remotable
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def create(self):
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if self.obj_attr_is_set('id'):
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raise exception.ObjectActionError(action='create',
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reason='already created')
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if 'uuid' not in self:
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self.uuid = uuidutils.generate_uuid()
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# Record who is initiating the migration which is
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# not necessarily the owner of the instance.
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if 'user_id' not in self:
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self.user_id = self._context.user_id
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if 'project_id' not in self:
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self.project_id = self._context.project_id
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updates = self.obj_get_changes()
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if 'migration_type' not in updates:
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raise exception.ObjectActionError(
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action="create",
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reason=_("cannot create a Migration object without a "
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"migration_type set"))
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db_migration = db.migration_create(self._context, updates)
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self._from_db_object(self._context, self, db_migration)
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@base.remotable
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def save(self):
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updates = self.obj_get_changes()
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updates.pop('id', None)
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db_migration = db.migration_update(self._context, self.id, updates)
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self._from_db_object(self._context, self, db_migration)
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self.obj_reset_changes()
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@property
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def instance(self):
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if not hasattr(self, '_cached_instance'):
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self._cached_instance = objects.Instance.get_by_uuid(
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self._context, self.instance_uuid,
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expected_attrs=['migration_context', 'flavor'])
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return self._cached_instance
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@instance.setter
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def instance(self, instance):
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self._cached_instance = instance
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def is_same_host(self):
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return self.source_compute == self.dest_compute
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@property
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def is_live_migration(self):
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return self.migration_type == fields.MigrationType.LIVE_MIGRATION
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@property
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def is_resize(self):
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return self.migration_type == fields.MigrationType.RESIZE
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@base.NovaObjectRegistry.register
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class MigrationList(base.ObjectListBase, base.NovaObject):
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# Version 1.0: Initial version
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# Migration <= 1.1
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# Version 1.1: Added use_slave to get_unconfirmed_by_dest_compute
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# Version 1.2: Migration version 1.2
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# Version 1.3: Added a new function to get in progress migrations
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# for an instance.
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# Version 1.4: Added sort_keys, sort_dirs, limit, marker kwargs to
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# get_by_filters for migrations pagination support.
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VERSION = '1.4'
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fields = {
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'objects': fields.ListOfObjectsField('Migration'),
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}
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@staticmethod
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@db.select_db_reader_mode
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def _db_migration_get_unconfirmed_by_dest_compute(
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context, confirm_window, dest_compute, use_slave=False):
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return db.migration_get_unconfirmed_by_dest_compute(
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context, confirm_window, dest_compute)
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@base.remotable_classmethod
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def get_unconfirmed_by_dest_compute(cls, context, confirm_window,
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dest_compute, use_slave=False):
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db_migrations = cls._db_migration_get_unconfirmed_by_dest_compute(
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context, confirm_window, dest_compute, use_slave=use_slave)
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return base.obj_make_list(context, cls(context), objects.Migration,
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db_migrations)
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@base.remotable_classmethod
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def get_in_progress_by_host_and_node(cls, context, host, node):
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db_migrations = db.migration_get_in_progress_by_host_and_node(
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context, host, node)
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return base.obj_make_list(context, cls(context), objects.Migration,
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db_migrations)
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@base.remotable_classmethod
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def get_by_filters(cls, context, filters, sort_keys=None, sort_dirs=None,
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limit=None, marker=None):
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db_migrations = db.migration_get_all_by_filters(
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context, filters, sort_keys=sort_keys, sort_dirs=sort_dirs,
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limit=limit, marker=marker)
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return base.obj_make_list(context, cls(context), objects.Migration,
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db_migrations)
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@base.remotable_classmethod
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def get_in_progress_by_instance(cls, context, instance_uuid,
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migration_type=None):
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db_migrations = db.migration_get_in_progress_by_instance(
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context, instance_uuid, migration_type)
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return base.obj_make_list(context, cls(context), objects.Migration,
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db_migrations)
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