284 lines
12 KiB
Python
284 lines
12 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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from oslo_utils import versionutils
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from sqlalchemy.orm import joinedload
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from sqlalchemy.sql import false
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from nova import context as nova_context
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from nova.db.sqlalchemy import api as db_api
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from nova.db.sqlalchemy import api_models
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from nova import exception
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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 cell_mapping
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from nova.objects import fields
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@base.NovaObjectRegistry.register
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class InstanceMapping(base.NovaTimestampObject, base.NovaObject):
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# Version 1.0: Initial version
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# Version 1.1: Add queued_for_delete
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VERSION = '1.1'
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fields = {
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'id': fields.IntegerField(read_only=True),
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'instance_uuid': fields.UUIDField(),
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'cell_mapping': fields.ObjectField('CellMapping', nullable=True),
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'project_id': fields.StringField(),
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'queued_for_delete': fields.BooleanField(default=False),
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}
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def obj_make_compatible(self, primitive, target_version):
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super(InstanceMapping, self).obj_make_compatible(primitive,
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target_version)
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target_version = versionutils.convert_version_to_tuple(target_version)
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if target_version < (1, 1):
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if 'queued_for_delete' in primitive:
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del primitive['queued_for_delete']
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def _update_with_cell_id(self, updates):
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cell_mapping_obj = updates.pop("cell_mapping", None)
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if cell_mapping_obj:
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updates["cell_id"] = cell_mapping_obj.id
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return updates
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@staticmethod
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def _from_db_object(context, instance_mapping, db_instance_mapping):
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for key in instance_mapping.fields:
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db_value = db_instance_mapping.get(key)
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if key == 'cell_mapping':
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# cell_mapping can be None indicating that the instance has
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# not been scheduled yet.
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if db_value:
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db_value = cell_mapping.CellMapping._from_db_object(
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context, cell_mapping.CellMapping(), db_value)
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setattr(instance_mapping, key, db_value)
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instance_mapping.obj_reset_changes()
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instance_mapping._context = context
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return instance_mapping
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@staticmethod
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@db_api.api_context_manager.reader
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def _get_by_instance_uuid_from_db(context, instance_uuid):
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db_mapping = (context.session.query(api_models.InstanceMapping)
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.options(joinedload('cell_mapping'))
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.filter(
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api_models.InstanceMapping.instance_uuid
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== instance_uuid)).first()
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if not db_mapping:
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raise exception.InstanceMappingNotFound(uuid=instance_uuid)
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return db_mapping
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@base.remotable_classmethod
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def get_by_instance_uuid(cls, context, instance_uuid):
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db_mapping = cls._get_by_instance_uuid_from_db(context, instance_uuid)
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return cls._from_db_object(context, cls(), db_mapping)
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@staticmethod
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@db_api.api_context_manager.writer
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def _create_in_db(context, updates):
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db_mapping = api_models.InstanceMapping()
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db_mapping.update(updates)
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db_mapping.save(context.session)
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# NOTE: This is done because a later access will trigger a lazy load
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# outside of the db session so it will fail. We don't lazy load
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# cell_mapping on the object later because we never need an
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# InstanceMapping without the CellMapping.
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db_mapping.cell_mapping
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return db_mapping
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@base.remotable
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def create(self):
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changes = self.obj_get_changes()
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changes = self._update_with_cell_id(changes)
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db_mapping = self._create_in_db(self._context, changes)
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self._from_db_object(self._context, self, db_mapping)
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@staticmethod
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@db_api.api_context_manager.writer
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def _save_in_db(context, instance_uuid, updates):
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db_mapping = context.session.query(
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api_models.InstanceMapping).filter_by(
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instance_uuid=instance_uuid).first()
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if not db_mapping:
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raise exception.InstanceMappingNotFound(uuid=instance_uuid)
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db_mapping.update(updates)
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# NOTE: This is done because a later access will trigger a lazy load
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# outside of the db session so it will fail. We don't lazy load
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# cell_mapping on the object later because we never need an
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# InstanceMapping without the CellMapping.
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db_mapping.cell_mapping
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context.session.add(db_mapping)
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return db_mapping
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@base.remotable
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def save(self):
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changes = self.obj_get_changes()
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changes = self._update_with_cell_id(changes)
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db_mapping = self._save_in_db(self._context, self.instance_uuid,
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changes)
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self._from_db_object(self._context, self, db_mapping)
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self.obj_reset_changes()
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@staticmethod
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@db_api.api_context_manager.writer
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def _destroy_in_db(context, instance_uuid):
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result = context.session.query(api_models.InstanceMapping).filter_by(
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instance_uuid=instance_uuid).delete()
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if not result:
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raise exception.InstanceMappingNotFound(uuid=instance_uuid)
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@base.remotable
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def destroy(self):
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self._destroy_in_db(self._context, self.instance_uuid)
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@db_api.api_context_manager.writer
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def populate_queued_for_delete(context, max_count):
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cells = objects.CellMappingList.get_all(context)
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processed = 0
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for cell in cells:
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ims = (
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# Get a direct list of instance mappings for this cell which
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# have not yet received a defined value decision for
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# queued_for_delete
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context.session.query(api_models.InstanceMapping)
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.options(joinedload('cell_mapping'))
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.filter(
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api_models.InstanceMapping.queued_for_delete == None) # noqa
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.filter(api_models.InstanceMapping.cell_id == cell.id)
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.limit(max_count).all())
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ims_by_inst = {im.instance_uuid: im for im in ims}
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with nova_context.target_cell(context, cell) as cctxt:
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filters = {'uuid': list(ims_by_inst.keys()),
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'deleted': True,
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'soft_deleted': True}
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instances = objects.InstanceList.get_by_filters(
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cctxt, filters, expected_attrs=[])
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# Walk through every deleted instance that has a mapping needing
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# to be updated and update it
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for instance in instances:
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im = ims_by_inst.pop(instance.uuid)
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im.queued_for_delete = True
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context.session.add(im)
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processed += 1
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# Any instances we did not just hit must be not-deleted, so
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# update the remaining mappings
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for non_deleted_im in ims_by_inst.values():
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non_deleted_im.queued_for_delete = False
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context.session.add(non_deleted_im)
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processed += 1
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max_count -= len(ims)
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if max_count <= 0:
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break
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return processed, processed
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@base.NovaObjectRegistry.register
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class InstanceMappingList(base.ObjectListBase, base.NovaObject):
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# Version 1.0: Initial version
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# Version 1.1: Added get_by_cell_id method.
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# Version 1.2: Added get_by_instance_uuids method
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VERSION = '1.2'
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fields = {
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'objects': fields.ListOfObjectsField('InstanceMapping'),
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}
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@staticmethod
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@db_api.api_context_manager.reader
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def _get_by_project_id_from_db(context, project_id):
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return (context.session.query(api_models.InstanceMapping)
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.options(joinedload('cell_mapping'))
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.filter(
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api_models.InstanceMapping.project_id == project_id)).all()
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@base.remotable_classmethod
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def get_by_project_id(cls, context, project_id):
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db_mappings = cls._get_by_project_id_from_db(context, project_id)
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return base.obj_make_list(context, cls(), objects.InstanceMapping,
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db_mappings)
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@staticmethod
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@db_api.api_context_manager.reader
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def _get_by_cell_id_from_db(context, cell_id):
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return (context.session.query(api_models.InstanceMapping)
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.options(joinedload('cell_mapping'))
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.filter(api_models.InstanceMapping.cell_id == cell_id)).all()
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@base.remotable_classmethod
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def get_by_cell_id(cls, context, cell_id):
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db_mappings = cls._get_by_cell_id_from_db(context, cell_id)
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return base.obj_make_list(context, cls(), objects.InstanceMapping,
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db_mappings)
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@staticmethod
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@db_api.api_context_manager.reader
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def _get_by_instance_uuids_from_db(context, uuids):
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return (context.session.query(api_models.InstanceMapping)
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.options(joinedload('cell_mapping'))
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.filter(api_models.InstanceMapping.instance_uuid.in_(uuids))
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.all())
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@base.remotable_classmethod
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def get_by_instance_uuids(cls, context, uuids):
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db_mappings = cls._get_by_instance_uuids_from_db(context, uuids)
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return base.obj_make_list(context, cls(), objects.InstanceMapping,
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db_mappings)
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@staticmethod
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@db_api.api_context_manager.writer
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def _destroy_bulk_in_db(context, instance_uuids):
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return context.session.query(api_models.InstanceMapping).filter(
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api_models.InstanceMapping.instance_uuid.in_(instance_uuids)).\
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delete(synchronize_session=False)
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@classmethod
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def destroy_bulk(cls, context, instance_uuids):
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return cls._destroy_bulk_in_db(context, instance_uuids)
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@staticmethod
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@db_api.api_context_manager.reader
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def _get_not_deleted_by_cell_and_project_from_db(context, cell_uuid,
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project_id, limit):
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query = (
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context.session.query(api_models.InstanceMapping)
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.filter_by(project_id=project_id)
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.filter_by(queued_for_delete=false())
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.join('cell_mapping')
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.options(joinedload('cell_mapping'))
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.filter(api_models.CellMapping.uuid == cell_uuid))
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if limit is not None:
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query = query.limit(limit)
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return query.all()
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@classmethod
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def get_not_deleted_by_cell_and_project(cls, context, cell_uuid,
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project_id, limit=None):
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"""Return a limit restricted list of InstanceMapping objects which are
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mapped to the specified cell_uuid, belong to the specified
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project_id and are not queued for deletion (note that unlike the other
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InstanceMappingList query methods which return all mappings
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irrespective of whether they are queued for deletion this method
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explicitly queries only for those mappings that are *not* queued for
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deletion as is evident from the naming of the method).
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"""
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db_mappings = cls._get_not_deleted_by_cell_and_project_from_db(
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context, cell_uuid, project_id, limit)
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return base.obj_make_list(context, cls(), objects.InstanceMapping,
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db_mappings)
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