461 lines
19 KiB
Python
461 lines
19 KiB
Python
# Copyright 2015 SimpliVity 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_config import cfg
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from oslo_log import log as logging
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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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CONF = cfg.CONF
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LOG = logging.getLogger(__name__)
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class MetadataObject(dict):
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# This is a wrapper class that simulates SQLAlchemy (.*)Metadata objects to
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# maintain compatibility with older representations of Volume that some
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# drivers rely on. This is helpful in transition period while some driver
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# methods are invoked with volume versioned object and some SQLAlchemy
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# object or dict.
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def __init__(self, key=None, value=None):
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super(MetadataObject, self).__init__()
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self.key = key
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self.value = value
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def __getattr__(self, name):
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if name in self:
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return self[name]
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else:
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raise AttributeError("No such attribute: " + name)
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def __setattr__(self, name, value):
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self[name] = value
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@base.CinderObjectRegistry.register
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class Volume(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: Added metadata, admin_metadata, volume_attachment, and
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# volume_type
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# Version 1.2: Added glance_metadata, consistencygroup and snapshots
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# Version 1.3: Added finish_volume_migration()
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VERSION = '1.3'
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OPTIONAL_FIELDS = ('metadata', 'admin_metadata', 'glance_metadata',
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'volume_type', 'volume_attachment', 'consistencygroup',
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'snapshots')
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DEFAULT_EXPECTED_ATTR = ('admin_metadata', 'metadata')
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fields = {
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'id': fields.UUIDField(),
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'_name_id': fields.UUIDField(nullable=True),
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'ec2_id': fields.UUIDField(nullable=True),
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'user_id': fields.UUIDField(nullable=True),
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'project_id': fields.UUIDField(nullable=True),
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'snapshot_id': fields.UUIDField(nullable=True),
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'host': fields.StringField(nullable=True),
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'size': fields.IntegerField(nullable=True),
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'availability_zone': fields.StringField(nullable=True),
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'status': fields.StringField(nullable=True),
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'attach_status': fields.StringField(nullable=True),
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'migration_status': fields.StringField(nullable=True),
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'scheduled_at': fields.DateTimeField(nullable=True),
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'launched_at': fields.DateTimeField(nullable=True),
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'terminated_at': fields.DateTimeField(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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'provider_id': fields.UUIDField(nullable=True),
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'provider_location': fields.StringField(nullable=True),
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'provider_auth': fields.StringField(nullable=True),
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'provider_geometry': fields.StringField(nullable=True),
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'volume_type_id': fields.UUIDField(nullable=True),
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'source_volid': fields.UUIDField(nullable=True),
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'encryption_key_id': fields.UUIDField(nullable=True),
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'consistencygroup_id': fields.UUIDField(nullable=True),
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'deleted': fields.BooleanField(default=False, nullable=True),
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'bootable': fields.BooleanField(default=False, nullable=True),
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'multiattach': fields.BooleanField(default=False, nullable=True),
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'replication_status': fields.StringField(nullable=True),
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'replication_extended_status': fields.StringField(nullable=True),
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'replication_driver_data': fields.StringField(nullable=True),
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'previous_status': fields.StringField(nullable=True),
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'metadata': fields.DictOfStringsField(nullable=True),
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'admin_metadata': fields.DictOfStringsField(nullable=True),
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'glance_metadata': fields.DictOfStringsField(nullable=True),
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'volume_type': fields.ObjectField('VolumeType', nullable=True),
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'volume_attachment': fields.ObjectField('VolumeAttachmentList',
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nullable=True),
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'consistencygroup': fields.ObjectField('ConsistencyGroup',
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nullable=True),
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'snapshots': fields.ObjectField('SnapshotList', nullable=True),
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}
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# NOTE(thangp): obj_extra_fields is used to hold properties that are not
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# usually part of the model
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obj_extra_fields = ['name', 'name_id', 'volume_metadata',
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'volume_admin_metadata', 'volume_glance_metadata']
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@property
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def name_id(self):
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return self.id if not self._name_id else self._name_id
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@name_id.setter
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def name_id(self, value):
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self._name_id = value
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@property
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def name(self):
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return CONF.volume_name_template % self.name_id
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# TODO(dulek): Three properties below are for compatibility with dict
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# representation of volume. The format there is different (list of
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# SQLAlchemy models) so we need a conversion. Anyway - these should be
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# removed when we stop this class from deriving from DictObjectCompat.
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@property
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def volume_metadata(self):
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md = [MetadataObject(k, v) for k, v in self.metadata.items()]
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return md
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@volume_metadata.setter
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def volume_metadata(self, value):
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md = {d['key']: d['value'] for d in value}
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self.metadata = md
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@property
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def volume_admin_metadata(self):
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md = [MetadataObject(k, v) for k, v in self.admin_metadata.items()]
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return md
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@volume_admin_metadata.setter
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def volume_admin_metadata(self, value):
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md = {d['key']: d['value'] for d in value}
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self.admin_metadata = md
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@property
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def volume_glance_metadata(self):
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md = [MetadataObject(k, v) for k, v in self.glance_metadata.items()]
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return md
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@volume_glance_metadata.setter
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def volume_glance_metadata(self, value):
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md = {d['key']: d['value'] for d in value}
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self.glance_metadata = md
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def __init__(self, *args, **kwargs):
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super(Volume, self).__init__(*args, **kwargs)
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self._orig_metadata = {}
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self._orig_admin_metadata = {}
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self._orig_glance_metadata = {}
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self._reset_metadata_tracking()
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def obj_reset_changes(self, fields=None):
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super(Volume, self).obj_reset_changes(fields)
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self._reset_metadata_tracking(fields=fields)
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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 'metadata' in self else {})
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if fields is None or 'admin_metadata' in fields:
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self._orig_admin_metadata = (dict(self.admin_metadata)
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if 'admin_metadata' in self
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else {})
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if fields is None or 'glance_metadata' in fields:
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self._orig_glance_metadata = (dict(self.glance_metadata)
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if 'glance_metadata' in self
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else {})
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def obj_what_changed(self):
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changes = super(Volume, self).obj_what_changed()
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if 'metadata' in self and self.metadata != self._orig_metadata:
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changes.add('metadata')
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if ('admin_metadata' in self and
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self.admin_metadata != self._orig_admin_metadata):
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changes.add('admin_metadata')
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if ('glance_metadata' in self and
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self.glance_metadata != self._orig_glance_metadata):
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changes.add('glance_metadata')
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return changes
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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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super(Volume, self).obj_make_compatible(primitive, target_version)
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target_version = versionutils.convert_version_to_tuple(target_version)
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@staticmethod
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def _from_db_object(context, volume, db_volume, 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 volume.fields.items():
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if name in Volume.OPTIONAL_FIELDS:
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continue
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value = db_volume.get(name)
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if isinstance(field, fields.IntegerField):
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value = value or 0
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volume[name] = value
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# Get data from db_volume object that was queried by joined query
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# from DB
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if 'metadata' in expected_attrs:
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metadata = db_volume.get('volume_metadata', [])
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volume.metadata = {item['key']: item['value'] for item in metadata}
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if 'admin_metadata' in expected_attrs:
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metadata = db_volume.get('volume_admin_metadata', [])
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volume.admin_metadata = {item['key']: item['value']
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for item in metadata}
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if 'glance_metadata' in expected_attrs:
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metadata = db_volume.get('volume_glance_metadata', [])
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volume.glance_metadata = {item['key']: item['value']
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for item in metadata}
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if 'volume_type' in expected_attrs:
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db_volume_type = db_volume.get('volume_type')
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if db_volume_type:
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volume.volume_type = objects.VolumeType._from_db_object(
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context, objects.VolumeType(), db_volume_type,
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expected_attrs='extra_specs')
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if 'volume_attachment' in expected_attrs:
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attachments = base.obj_make_list(
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context, objects.VolumeAttachmentList(context),
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objects.VolumeAttachment,
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db_volume.get('volume_attachment'))
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volume.volume_attachment = attachments
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if 'consistencygroup' in expected_attrs:
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consistencygroup = objects.ConsistencyGroup(context)
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consistencygroup._from_db_object(context,
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consistencygroup,
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db_volume['consistencygroup'])
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volume.consistencygroup = consistencygroup
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if 'snapshots' in expected_attrs:
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snapshots = base.obj_make_list(
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context, objects.SnapshotList(context),
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objects.Snapshot,
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db_volume['snapshots'])
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volume.snapshots = snapshots
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volume._context = context
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volume.obj_reset_changes()
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return volume
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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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updates = self.cinder_obj_get_changes()
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if 'consistencygroup' in updates:
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raise exception.ObjectActionError(
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action='create', reason=_('consistencygroup assigned'))
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if 'snapshots' in updates:
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raise exception.ObjectActionError(
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action='create', reason=_('snapshots assigned'))
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db_volume = db.volume_create(self._context, updates)
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self._from_db_object(self._context, self, db_volume)
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@base.remotable
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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 'consistencygroup' in updates:
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raise exception.ObjectActionError(
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action='save', reason=_('consistencygroup changed'))
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if 'glance_metadata' in updates:
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raise exception.ObjectActionError(
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action='save', reason=_('glance_metadata changed'))
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if 'snapshots' in updates:
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raise exception.ObjectActionError(
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action='save', reason=_('snapshots changed'))
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if 'metadata' in updates:
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# Metadata items that are not specified in the
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# self.metadata will be deleted
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metadata = updates.pop('metadata', None)
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self.metadata = db.volume_metadata_update(self._context,
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self.id, metadata,
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True)
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if self._context.is_admin and 'admin_metadata' in updates:
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metadata = updates.pop('admin_metadata', None)
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self.admin_metadata = db.volume_admin_metadata_update(
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self._context, self.id, metadata, True)
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db.volume_update(self._context, self.id, updates)
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self.obj_reset_changes()
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@base.remotable
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def destroy(self):
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with self.obj_as_admin():
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db.volume_destroy(self._context, self.id)
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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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if attrname == 'metadata':
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self.metadata = db.volume_metadata_get(self._context, self.id)
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elif attrname == 'admin_metadata':
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self.admin_metadata = {}
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if self._context.is_admin:
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self.admin_metadata = db.volume_admin_metadata_get(
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self._context, self.id)
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elif attrname == 'glance_metadata':
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try:
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# NOTE(dulek): We're using alias here to have conversion from
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# list to dict done there.
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self.volume_glance_metadata = db.volume_glance_metadata_get(
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self._context, self.id)
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except exception.GlanceMetadataNotFound:
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# NOTE(dulek): DB API raises when volume has no
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# glance_metadata. Silencing this because at this level no
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# metadata is a completely valid result.
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self.glance_metadata = {}
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elif attrname == 'volume_type':
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# If the volume doesn't have volume_type, VolumeType.get_by_id
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# would trigger a db call which raise VolumeTypeNotFound exception.
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self.volume_type = (objects.VolumeType.get_by_id(
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self._context, self.volume_type_id) if self.volume_type_id
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else None)
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elif attrname == 'volume_attachment':
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attachments = objects.VolumeAttachmentList.get_all_by_volume_id(
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self._context, self.id)
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self.volume_attachment = attachments
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elif attrname == 'consistencygroup':
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consistencygroup = objects.ConsistencyGroup.get_by_id(
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self._context, self.consistencygroup_id)
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self.consistencygroup = consistencygroup
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elif attrname == 'snapshots':
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self.snapshots = objects.SnapshotList.get_all_for_volume(
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self._context, self.id)
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self.obj_reset_changes(fields=[attrname])
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def delete_metadata_key(self, key):
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db.volume_metadata_delete(self._context, self.id, key)
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md_was_changed = 'metadata' in self.obj_what_changed()
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del self.metadata[key]
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self._orig_metadata.pop(key, None)
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if not md_was_changed:
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self.obj_reset_changes(['metadata'])
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def finish_volume_migration(self, dest_volume):
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# We swap fields between source (i.e. self) and destination at the
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# end of migration because we want to keep the original volume id
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# in the DB but now pointing to the migrated volume.
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skip = ({'id', 'provider_location', 'glance_metadata'} |
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set(self.obj_extra_fields))
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for key in set(dest_volume.fields.keys()) - skip:
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# Only swap attributes that are already set. We do not want to
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# unexpectedly trigger a lazy-load.
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if not dest_volume.obj_attr_is_set(key):
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continue
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value = getattr(dest_volume, key)
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value_to_dst = getattr(self, key)
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# Destination must have a _name_id since the id no longer matches
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# the volume. If it doesn't have a _name_id we set one.
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if key == '_name_id':
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if not dest_volume._name_id:
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setattr(dest_volume, key, self.id)
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continue
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elif key == 'migration_status':
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value = None
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value_to_dst = 'deleting'
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elif key == 'display_description':
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value_to_dst = 'migration src for ' + self.id
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elif key == 'status':
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value_to_dst = 'deleting'
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setattr(self, key, value)
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setattr(dest_volume, key, value_to_dst)
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dest_volume.save()
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return dest_volume
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@base.CinderObjectRegistry.register
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class VolumeList(base.ObjectListBase, base.CinderObject):
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VERSION = '1.1'
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fields = {
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'objects': fields.ListOfObjectsField('Volume'),
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}
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child_versions = {
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'1.0': '1.0',
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'1.1': '1.1',
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}
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@base.remotable_classmethod
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def get_all(cls, context, marker, limit, sort_keys=None, sort_dirs=None,
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filters=None, offset=None):
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volumes = db.volume_get_all(context, marker, limit,
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sort_keys=sort_keys, sort_dirs=sort_dirs,
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filters=filters, offset=offset)
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expected_attrs = ['admin_metadata', 'metadata']
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return base.obj_make_list(context, cls(context), objects.Volume,
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volumes, expected_attrs=expected_attrs)
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@base.remotable_classmethod
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def get_all_by_host(cls, context, host, filters=None):
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volumes = db.volume_get_all_by_host(context, host, filters)
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expected_attrs = ['admin_metadata', 'metadata']
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return base.obj_make_list(context, cls(context), objects.Volume,
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volumes, expected_attrs=expected_attrs)
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@base.remotable_classmethod
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def get_all_by_group(cls, context, group_id, filters=None):
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volumes = db.volume_get_all_by_group(context, group_id, filters)
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expected_attrs = ['admin_metadata', 'metadata']
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return base.obj_make_list(context, cls(context), objects.Volume,
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volumes, expected_attrs=expected_attrs)
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@base.remotable_classmethod
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def get_all_by_project(cls, context, project_id, marker, limit,
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sort_keys=None, sort_dirs=None, filters=None,
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offset=None):
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volumes = db.volume_get_all_by_project(context, project_id, marker,
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limit, sort_keys=sort_keys,
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sort_dirs=sort_dirs,
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filters=filters, offset=offset)
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expected_attrs = ['admin_metadata', 'metadata']
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return base.obj_make_list(context, cls(context), objects.Volume,
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volumes, expected_attrs=expected_attrs)
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