349 lines
14 KiB
Python
349 lines
14 KiB
Python
# Copyright 2015 Intel Corporation
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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_config import cfg
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from oslo_serialization import base64
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from oslo_serialization import jsonutils
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from oslo_utils import versionutils
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from oslo_versionedobjects import fields
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from cinder import db
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from cinder import exception
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from cinder.i18n import _
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from cinder import objects
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from cinder.objects import base
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from cinder.objects import fields as c_fields
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CONF = cfg.CONF
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@base.CinderObjectRegistry.register
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class Backup(base.CinderPersistentObject, base.CinderObject,
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base.CinderObjectDictCompat, base.CinderComparableObject):
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# Version 1.0: Initial version
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# Version 1.1: Add new field num_dependent_backups and extra fields
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# is_incremental and has_dependent_backups.
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# Version 1.2: Add new field snapshot_id and data_timestamp.
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# Version 1.3: Changed 'status' field to use BackupStatusField
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# Version 1.4: Add restore_volume_id
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# Version 1.5: Add metadata
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# Version 1.6: Add encryption_key_id
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# Version 1.7: Add parent
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VERSION = '1.7'
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OPTIONAL_FIELDS = ('metadata',)
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fields = {
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'id': fields.UUIDField(),
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'user_id': fields.StringField(),
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'project_id': fields.StringField(),
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'volume_id': fields.UUIDField(),
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'host': fields.StringField(nullable=True),
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'availability_zone': fields.StringField(nullable=True),
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'container': fields.StringField(nullable=True),
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'parent_id': fields.StringField(nullable=True),
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'parent': fields.ObjectField('Backup', nullable=True),
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'status': c_fields.BackupStatusField(nullable=True),
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'fail_reason': fields.StringField(nullable=True),
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'size': fields.IntegerField(nullable=True),
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'display_name': fields.StringField(nullable=True),
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'display_description': fields.StringField(nullable=True),
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# NOTE(dulek): Metadata field is used to store any strings by backup
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# drivers, that's why it can't be DictOfStringsField.
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'service_metadata': fields.StringField(nullable=True),
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'service': fields.StringField(nullable=True),
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'object_count': fields.IntegerField(nullable=True),
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'temp_volume_id': fields.StringField(nullable=True),
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'temp_snapshot_id': fields.StringField(nullable=True),
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'num_dependent_backups': fields.IntegerField(nullable=True),
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'snapshot_id': fields.StringField(nullable=True),
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'data_timestamp': fields.DateTimeField(nullable=True),
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'restore_volume_id': fields.StringField(nullable=True),
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'metadata': fields.DictOfStringsField(nullable=True),
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'encryption_key_id': fields.StringField(nullable=True),
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}
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obj_extra_fields = ['name', 'is_incremental', 'has_dependent_backups']
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def __init__(self, *args, **kwargs):
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super(Backup, self).__init__(*args, **kwargs)
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self._orig_metadata = {}
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self._reset_metadata_tracking()
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def _reset_metadata_tracking(self, fields=None):
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if fields is None or 'metadata' in fields:
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self._orig_metadata = (dict(self.metadata)
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if self.obj_attr_is_set('metadata') else {})
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@classmethod
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def _get_expected_attrs(cls, context, *args, **kwargs):
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return 'metadata',
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@property
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def name(self):
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return CONF.backup_name_template % self.id
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@property
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def is_incremental(self):
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return bool(self.parent_id)
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@property
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def has_dependent_backups(self):
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return bool(self.num_dependent_backups)
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def obj_make_compatible(self, primitive, target_version):
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"""Make an object representation compatible with a target version."""
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added_fields = (((1, 7), ('parent',)),)
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super(Backup, self).obj_make_compatible(primitive, target_version)
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target_version = versionutils.convert_version_to_tuple(target_version)
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for version, remove_fields in added_fields:
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if target_version < version:
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for obj_field in remove_fields:
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primitive.pop(obj_field, None)
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@classmethod
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def _from_db_object(cls, context, backup, db_backup, expected_attrs=None):
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if expected_attrs is None:
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expected_attrs = []
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for name, field in backup.fields.items():
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if name in cls.OPTIONAL_FIELDS:
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continue
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value = db_backup.get(name)
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if isinstance(field, fields.IntegerField):
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value = value if value is not None else 0
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backup[name] = value
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if 'metadata' in expected_attrs:
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metadata = db_backup.get('backup_metadata')
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if metadata is None:
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raise exception.MetadataAbsent()
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backup.metadata = {item['key']: item['value']
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for item in metadata}
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backup._context = context
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backup.obj_reset_changes()
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return backup
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def obj_reset_changes(self, fields=None):
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super(Backup, self).obj_reset_changes(fields)
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self._reset_metadata_tracking(fields=fields)
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def obj_load_attr(self, attrname):
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if attrname not in self.OPTIONAL_FIELDS:
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raise exception.ObjectActionError(
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action='obj_load_attr',
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reason=_('attribute %s not lazy-loadable') % attrname)
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if not self._context:
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raise exception.OrphanedObjectError(method='obj_load_attr',
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objtype=self.obj_name())
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self.obj_reset_changes(fields=[attrname])
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def obj_what_changed(self):
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changes = super(Backup, self).obj_what_changed()
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if hasattr(self, 'metadata') and self.metadata != self._orig_metadata:
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changes.add('metadata')
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return changes
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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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updates = self.cinder_obj_get_changes()
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db_backup = db.backup_create(self._context, updates)
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self._from_db_object(self._context, self, db_backup)
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def save(self):
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updates = self.cinder_obj_get_changes()
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if updates:
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if 'metadata' in updates:
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metadata = updates.pop('metadata', None)
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self.metadata = db.backup_metadata_update(self._context,
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self.id, metadata,
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True)
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updates.pop('parent', None)
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db.backup_update(self._context, self.id, updates)
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self.obj_reset_changes()
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def destroy(self):
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with self.obj_as_admin():
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updated_values = db.backup_destroy(self._context, self.id)
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self.update(updated_values)
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self.obj_reset_changes(updated_values.keys())
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@staticmethod
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def decode_record(backup_url):
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"""Deserialize backup metadata from string into a dictionary.
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:raises InvalidInput:
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"""
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try:
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return jsonutils.loads(base64.decode_as_text(backup_url))
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except TypeError:
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msg = _("Can't decode backup record.")
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except ValueError:
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msg = _("Can't parse backup record.")
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raise exception.InvalidInput(reason=msg)
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def encode_record(self, **kwargs):
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"""Serialize backup object, with optional extra info, into a string."""
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# We don't want to export extra fields and we want to force lazy
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# loading, so we can't use dict(self) or self.obj_to_primitive
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record = {name: field.to_primitive(self, name, getattr(self, name))
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for name, field in self.fields.items()}
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# We must update kwargs instead of record to ensure we don't overwrite
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# "real" data from the backup
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kwargs.update(record)
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retval = jsonutils.dump_as_bytes(kwargs)
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return base64.encode_as_text(retval)
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@base.CinderObjectRegistry.register
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class BackupList(base.ObjectListBase, base.CinderObject):
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VERSION = '1.0'
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fields = {
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'objects': fields.ListOfObjectsField('Backup'),
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}
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@classmethod
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def get_all(cls, context, filters=None, marker=None, limit=None,
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offset=None, sort_keys=None, sort_dirs=None):
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backups = db.backup_get_all(context, filters, marker, limit, offset,
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sort_keys, sort_dirs)
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expected_attrs = Backup._get_expected_attrs(context)
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return base.obj_make_list(context, cls(context), objects.Backup,
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backups, expected_attrs=expected_attrs)
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@classmethod
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def get_all_by_host(cls, context, host):
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backups = db.backup_get_all_by_host(context, host)
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expected_attrs = Backup._get_expected_attrs(context)
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return base.obj_make_list(context, cls(context), objects.Backup,
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backups, expected_attrs=expected_attrs)
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@classmethod
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def get_all_by_project(cls, context, project_id, filters=None,
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marker=None, limit=None, offset=None,
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sort_keys=None, sort_dirs=None):
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backups = db.backup_get_all_by_project(context, project_id, filters,
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marker, limit, offset,
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sort_keys, sort_dirs)
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expected_attrs = Backup._get_expected_attrs(context)
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return base.obj_make_list(context, cls(context), objects.Backup,
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backups, expected_attrs=expected_attrs)
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@classmethod
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def get_all_by_volume(cls, context, volume_id, filters=None):
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backups = db.backup_get_all_by_volume(context, volume_id, filters)
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expected_attrs = Backup._get_expected_attrs(context)
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return base.obj_make_list(context, cls(context), objects.Backup,
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backups, expected_attrs=expected_attrs)
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@classmethod
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def get_all_active_by_window(cls, context, begin, end):
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backups = db.backup_get_all_active_by_window(context, begin, end)
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expected_attrs = Backup._get_expected_attrs(context)
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return base.obj_make_list(context, cls(context), objects.Backup,
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backups, expected_attrs=expected_attrs)
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@base.CinderObjectRegistry.register
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class BackupImport(Backup):
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"""Special object for Backup Imports.
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This class should not be used for anything but Backup creation when
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importing backups to the DB.
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On creation it allows to specify the ID for the backup, since it's the
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reference used in parent_id it is imperative that this is preserved.
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Backup Import objects get promoted to standard Backups when the import is
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completed.
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"""
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def create(self):
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updates = self.cinder_obj_get_changes()
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db_backup = db.backup_create(self._context, updates)
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self._from_db_object(self._context, self, db_backup)
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@base.CinderObjectRegistry.register
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class BackupDeviceInfo(base.CinderObject, base.CinderObjectDictCompat,
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base.CinderComparableObject):
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# Version 1.0: Initial version
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VERSION = '1.0'
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fields = {
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'volume': fields.ObjectField('Volume', nullable=True),
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'snapshot': fields.ObjectField('Snapshot', nullable=True),
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'secure_enabled': fields.BooleanField(default=False),
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}
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obj_extra_fields = ['is_snapshot', 'device_obj']
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@property
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def is_snapshot(self):
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if self.obj_attr_is_set('snapshot') == self.obj_attr_is_set('volume'):
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msg = _("Either snapshot or volume field should be set.")
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raise exception.ProgrammingError(message=msg)
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return self.obj_attr_is_set('snapshot')
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@property
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def device_obj(self):
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return self.snapshot if self.is_snapshot else self.volume
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# FIXME(sborkows): This should go away in early O as we stop supporting
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# backward compatibility with M.
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@classmethod
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def from_primitive(cls, primitive, context, expected_attrs=None):
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backup_device = BackupDeviceInfo()
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if primitive['is_snapshot']:
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if isinstance(primitive['backup_device'], objects.Snapshot):
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backup_device.snapshot = primitive['backup_device']
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else:
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backup_device.snapshot = objects.Snapshot._from_db_object(
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context, objects.Snapshot(), primitive['backup_device'],
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expected_attrs=expected_attrs)
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else:
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if isinstance(primitive['backup_device'], objects.Volume):
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backup_device.volume = primitive['backup_device']
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else:
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backup_device.volume = objects.Volume._from_db_object(
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context, objects.Volume(), primitive['backup_device'],
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expected_attrs=expected_attrs)
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backup_device.secure_enabled = primitive['secure_enabled']
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return backup_device
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# FIXME(sborkows): This should go away in early O as we stop supporting
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# backward compatibility with M.
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def to_primitive(self, context):
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backup_device = (db.snapshot_get(context, self.snapshot.id)
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if self.is_snapshot
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else db.volume_get(context, self.volume.id))
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primitive = {'backup_device': backup_device,
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'secure_enabled': self.secure_enabled,
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'is_snapshot': self.is_snapshot}
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return primitive
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