# Copyright (c) 2018, Red Hat, Inc.
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
from __future__ import absolute_import
import json as json_lib
import sys
import uuid
from cinder import context
from cinder import exception as cinder_exception
from cinder import objects as cinder_objs
from cinder.objects import base as cinder_base_ovo
from os_brick import exception as brick_exception
from os_brick import initiator as brick_initiator
from os_brick.initiator import connector as brick_connector
from oslo_config import cfg
from oslo_log import log as logging
from oslo_utils import timeutils
import six
from cinderlib import exception
from cinderlib import utils
LOG = logging.getLogger(__name__)
DEFAULT_PROJECT_ID = 'cinderlib'
DEFAULT_USER_ID = 'cinderlib'
BACKEND_NAME_SNAPSHOT_FIELD = 'progress'
CONNECTIONS_OVO_FIELD = 'volume_attachment'
GB = 1024 ** 3
# This cannot go in the setup method because cinderlib objects need them to
# be setup to set OVO_CLASS
cinder_objs.register_all()
[docs]class KeyValue(object):
def __init__(self, key=None, value=None):
self.key = key
self.value = value
def __eq__(self, other):
return (self.key, self.value) == (other.key, other.value)
[docs]class Object(object):
"""Base class for our resource representation objects."""
SIMPLE_JSON_IGNORE = tuple()
DEFAULT_FIELDS_VALUES = {}
LAZY_PROPERTIES = tuple()
backend_class = None
CONTEXT = context.RequestContext(user_id=DEFAULT_USER_ID,
project_id=DEFAULT_PROJECT_ID,
is_admin=True,
overwrite=False)
def _get_backend(self, backend_name_or_obj):
if isinstance(backend_name_or_obj, six.string_types):
try:
return self.backend_class.backends[backend_name_or_obj]
except KeyError:
if self.backend_class.fail_on_missing_backend:
raise
return backend_name_or_obj
def __init__(self, backend, **fields_data):
self.backend = self._get_backend(backend)
__ovo = fields_data.get('__ovo')
if __ovo:
self._ovo = __ovo
else:
self._ovo = self._create_ovo(**fields_data)
# Store a reference to the cinderlib obj in the OVO for serialization
self._ovo._cl_obj_ = self
[docs] @classmethod
def setup(cls, persistence_driver, backend_class, project_id, user_id,
non_uuid_ids):
cls.persistence = persistence_driver
cls.backend_class = backend_class
# Set the global context if we aren't using the default
project_id = project_id or DEFAULT_PROJECT_ID
user_id = user_id or DEFAULT_USER_ID
if (project_id != cls.CONTEXT.project_id or
user_id != cls.CONTEXT.user_id):
cls.CONTEXT.user_id = user_id
cls.CONTEXT.project_id = project_id
Volume.DEFAULT_FIELDS_VALUES['user_id'] = user_id
Volume.DEFAULT_FIELDS_VALUES['project_id'] = project_id
# Configure OVOs to support non_uuid_ids
if non_uuid_ids:
for ovo_name in cinder_base_ovo.CinderObjectRegistry.obj_classes():
ovo_cls = getattr(cinder_objs, ovo_name)
if 'id' in ovo_cls.fields:
ovo_cls.fields['id'] = cinder_base_ovo.fields.StringField()
def _to_primitive(self):
"""Return custom cinderlib data for serialization."""
return None
def _create_ovo(self, **fields_data):
# The base are the default values we define on our own classes
fields_values = self.DEFAULT_FIELDS_VALUES.copy()
# Apply the values defined by the caller
fields_values.update(fields_data)
# We support manually setting the id, so set only if not already set
# or if set to None
if not fields_values.get('id'):
fields_values['id'] = self.new_uuid()
# Set non set field values based on OVO's default value and on whether
# it is nullable or not.
for field_name, field in self.OVO_CLASS.fields.items():
if field.default != cinder_base_ovo.fields.UnspecifiedDefault:
fields_values.setdefault(field_name, field.default)
elif field.nullable:
fields_values.setdefault(field_name, None)
if ('created_at' in self.OVO_CLASS.fields and
not fields_values.get('created_at')):
fields_values['created_at'] = timeutils.utcnow()
return self.OVO_CLASS(context=self.CONTEXT, **fields_values)
@property
def json(self):
return self.to_json(simplified=False)
[docs] def to_json(self, simplified=True):
visited = set()
if simplified:
for field in self.SIMPLE_JSON_IGNORE:
if self._ovo.obj_attr_is_set(field):
visited.add(id(getattr(self._ovo, field)))
ovo = self._ovo.obj_to_primitive(visited=visited)
return {'class': type(self).__name__,
# If no driver loaded, just return the name of the backend
'backend': getattr(self.backend, 'config',
{'volume_backend_name': self.backend}),
'ovo': ovo}
@property
def jsons(self):
return self.to_jsons(simplified=False)
[docs] def to_jsons(self, simplified=True):
json_data = self.to_json(simplified)
return json_lib.dumps(json_data, separators=(',', ':'))
def _only_ovo_data(self, ovo):
if isinstance(ovo, dict):
if 'versioned_object.data' in ovo:
value = ovo['versioned_object.data']
if ['objects'] == value.keys():
return self._only_ovo_data(value['objects'])
key = ovo['versioned_object.name'].lower()
return {key: self._only_ovo_data(value)}
for key in ovo.keys():
ovo[key] = self._only_ovo_data(ovo[key])
if isinstance(ovo, list) and ovo:
return [self._only_ovo_data(e) for e in ovo]
return ovo
[docs] def to_dict(self):
json_ovo = self.json
return self._only_ovo_data(json_ovo['ovo'])
@property
def dump(self):
# Make sure we load lazy loading properties
for lazy_property in self.LAZY_PROPERTIES:
getattr(self, lazy_property)
return self.json
@property
def dumps(self):
return json_lib.dumps(self.dump, separators=(',', ':'))
def __repr__(self):
backend = self.backend
if isinstance(self.backend, self.backend_class):
backend = backend.id
return ('<cinderlib.%s object %s on backend %s>' %
(type(self).__name__, self.id, backend))
[docs] @classmethod
def load(cls, json_src, save=False):
backend = cls.backend_class.load_backend(json_src['backend'])
ovo = cinder_base_ovo.CinderObject.obj_from_primitive(json_src['ovo'],
cls.CONTEXT)
return cls._load(backend, ovo, save=save)
[docs] @staticmethod
def new_uuid():
return str(uuid.uuid4())
def __getattr__(self, name):
if name == '_ovo':
raise AttributeError('Attribute _ovo is not yet set')
return getattr(self._ovo, name)
def _raise_with_resource(self):
exc_info = sys.exc_info()
exc_info[1].resource = self
six.reraise(*exc_info)
[docs]class NamedObject(Object):
def __init__(self, backend, **fields_data):
if 'description' in fields_data:
fields_data['display_description'] = fields_data.pop('description')
if 'name' in fields_data:
fields_data['display_name'] = fields_data.pop('name')
super(NamedObject, self).__init__(backend, **fields_data)
@property
def name(self):
return self._ovo.display_name
@property
def description(self):
return self._ovo.display_description
@property
def name_in_storage(self):
return self._ovo.name
[docs]class LazyVolumeAttr(object):
LAZY_PROPERTIES = ('volume',)
_volume = None
def __init__(self, volume):
if volume:
self._volume = volume
# Ensure circular reference is set
self._ovo.volume = volume._ovo
self._ovo.volume_id = volume._ovo.id
elif self._ovo.obj_attr_is_set('volume'):
self._volume = Volume._load(self.backend, self._ovo.volume)
@property
def volume(self):
# Lazy loading
if self._volume is None:
self._volume = Volume.get_by_id(self.volume_id)
self._ovo.volume = self._volume._ovo
return self._volume
@volume.setter
def volume(self, value):
self._volume = value
self._ovo.volume = value._ovo
[docs] def refresh(self):
last_self = self.get_by_id(self.id)
if self._volume is not None:
last_self.volume
vars(self).clear()
vars(self).update(vars(last_self))
[docs]class Volume(NamedObject):
OVO_CLASS = cinder_objs.Volume
SIMPLE_JSON_IGNORE = ('snapshots', 'volume_attachment')
DEFAULT_FIELDS_VALUES = {
'size': 1,
'user_id': Object.CONTEXT.user_id,
'project_id': Object.CONTEXT.project_id,
'status': 'creating',
'attach_status': 'detached',
'metadata': {},
'admin_metadata': {},
'glance_metadata': {},
}
LAZY_PROPERTIES = ('snapshots', 'connections')
_ignore_keys = ('id', CONNECTIONS_OVO_FIELD, 'snapshots', 'volume_type')
def __init__(self, backend_or_vol, pool_name=None, **kwargs):
# Accept backend name for convenience
if isinstance(backend_or_vol, six.string_types):
backend_name = backend_or_vol
backend_or_vol = self._get_backend(backend_or_vol)
elif isinstance(backend_or_vol, self.backend_class):
backend_name = backend_or_vol.id
elif isinstance(backend_or_vol, Volume):
backend_str, pool = backend_or_vol._ovo.host.split('#')
backend_name = backend_str.split('@')[-1]
pool_name = pool_name or pool
for key in backend_or_vol._ovo.fields:
if (backend_or_vol._ovo.obj_attr_is_set(key) and
key not in self._ignore_keys):
kwargs.setdefault(key, getattr(backend_or_vol._ovo, key))
if backend_or_vol.volume_type:
kwargs.setdefault('extra_specs',
backend_or_vol.volume_type.extra_specs)
if backend_or_vol.volume_type.qos_specs:
kwargs.setdefault(
'qos_specs',
backend_or_vol.volume_type.qos_specs.specs)
backend_or_vol = backend_or_vol.backend
if '__ovo' not in kwargs:
kwargs[CONNECTIONS_OVO_FIELD] = (
cinder_objs.VolumeAttachmentList(context=self.CONTEXT))
kwargs['snapshots'] = (
cinder_objs.SnapshotList(context=self.CONTEXT))
self._snapshots = []
self._connections = []
qos_specs = kwargs.pop('qos_specs', None)
extra_specs = kwargs.pop('extra_specs', {})
super(Volume, self).__init__(backend_or_vol, **kwargs)
self._populate_data()
self.local_attach = None
# If we overwrote the host, then we ignore pool_name and don't set a
# default value or copy the one from the source either.
if 'host' not in kwargs and '__ovo' not in kwargs:
# TODO(geguileo): Add pool support
pool_name = pool_name or backend_or_vol.pool_names[0]
self._ovo.host = ('%s@%s#%s' %
(cfg.CONF.host, backend_name, pool_name))
if qos_specs or extra_specs:
if qos_specs:
qos_specs = cinder_objs.QualityOfServiceSpecs(
id=self.id, name=self.id,
consumer='back-end', specs=qos_specs)
qos_specs_id = self.id
else:
qos_specs = qos_specs_id = None
self._ovo.volume_type = cinder_objs.VolumeType(
context=self.CONTEXT,
is_public=True,
id=self.id,
name=self.id,
qos_specs_id=qos_specs_id,
extra_specs=extra_specs,
qos_specs=qos_specs)
self._ovo.volume_type_id = self.id
@property
def snapshots(self):
# Lazy loading
if self._snapshots is None:
self._snapshots = self.persistence.get_snapshots(volume_id=self.id)
for snap in self._snapshots:
snap.volume = self
ovos = [snap._ovo for snap in self._snapshots]
self._ovo.snapshots = cinder_objs.SnapshotList(objects=ovos)
self._ovo.obj_reset_changes(('snapshots',))
return self._snapshots
@property
def connections(self):
# Lazy loading
if self._connections is None:
# Check if the driver has already lazy loaded it using OVOs
if self._ovo.obj_attr_is_set(CONNECTIONS_OVO_FIELD):
conns = [Connection(None, volume=self, __ovo=ovo)
for ovo
in getattr(self._ovo, CONNECTIONS_OVO_FIELD).objects]
# Retrieve data from persistence storage
else:
conns = self.persistence.get_connections(volume_id=self.id)
for conn in conns:
conn.volume = self
ovos = [conn._ovo for conn in conns]
setattr(self._ovo, CONNECTIONS_OVO_FIELD,
cinder_objs.VolumeAttachmentList(objects=ovos))
self._ovo.obj_reset_changes((CONNECTIONS_OVO_FIELD,))
self._connections = conns
return self._connections
[docs] @classmethod
def get_by_id(cls, volume_id):
result = cls.persistence.get_volumes(volume_id=volume_id)
if not result:
raise exception.VolumeNotFound(volume_id=volume_id)
return result[0]
[docs] @classmethod
def get_by_name(cls, volume_name):
return cls.persistence.get_volumes(volume_name=volume_name)
def _populate_data(self):
if self._ovo.obj_attr_is_set('snapshots'):
self._snapshots = []
for snap_ovo in self._ovo.snapshots:
# Set circular reference
snap_ovo.volume = self._ovo
Snapshot._load(self.backend, snap_ovo, self)
else:
self._snapshots = None
if self._ovo.obj_attr_is_set(CONNECTIONS_OVO_FIELD):
self._connections = []
for conn_ovo in getattr(self._ovo, CONNECTIONS_OVO_FIELD):
# Set circular reference
conn_ovo.volume = self._ovo
Connection._load(self.backend, conn_ovo, self)
else:
self._connections = None
@classmethod
def _load(cls, backend, ovo, save=None):
vol = cls(backend, __ovo=ovo)
if save:
vol.save()
if vol._snapshots:
for s in vol._snapshots:
s.obj_reset_changes()
s.save()
if vol._connections:
for c in vol._connections:
c.obj_reset_changes()
c.save()
return vol
[docs] def create(self):
self.backend._start_creating_volume(self)
try:
model_update = self.backend.driver.create_volume(self._ovo)
self._ovo.status = 'available'
if model_update:
self._ovo.update(model_update)
self.backend._volume_created(self)
except Exception:
self._ovo.status = 'error'
self._raise_with_resource()
finally:
self.save()
def _snapshot_removed(self, snapshot):
# The snapshot instance in memory could be out of sync and not be
# identical, so check by ID.
i, snap = utils.find_by_id(snapshot.id, self._snapshots)
if snap:
del self._snapshots[i]
i, ovo = utils.find_by_id(snapshot.id, self._ovo.snapshots.objects)
if ovo:
del self._ovo.snapshots.objects[i]
def _connection_removed(self, connection):
# The connection instance in memory could be out of sync and not be
# identical, so check by ID.
i, conn = utils.find_by_id(connection.id, self._connections)
if conn:
del self._connections[i]
ovo_conns = getattr(self._ovo, CONNECTIONS_OVO_FIELD).objects
i, ovo_conn = utils.find_by_id(connection.id, ovo_conns)
if ovo_conn:
del ovo_conns[i]
[docs] def delete(self):
if self.snapshots:
msg = 'Cannot delete volume %s with snapshots' % self.id
raise exception.InvalidVolume(reason=msg)
try:
self.backend.driver.delete_volume(self._ovo)
self.persistence.delete_volume(self)
self.backend._volume_removed(self)
self._ovo.status = 'deleted'
except Exception:
self._ovo.status = 'error_deleting'
self.save()
self._raise_with_resource()
[docs] def extend(self, size):
volume = self._ovo
volume.previous_status = volume.status
volume.status = 'extending'
try:
self.backend.driver.extend_volume(volume, size)
volume.size = size
volume.status = volume.previous_status
volume.previous_status = None
except Exception:
volume.status = 'error'
self._raise_with_resource()
finally:
self.save()
if volume.status == 'in-use' and self.local_attach:
return self.local_attach.extend()
# Must return size in bytes
return size * GB
[docs] def clone(self, **new_vol_attrs):
new_vol_attrs['source_volid'] = self.id
new_vol = Volume(self, **new_vol_attrs)
self.backend._start_creating_volume(new_vol)
try:
model_update = self.backend.driver.create_cloned_volume(
new_vol._ovo, self._ovo)
new_vol._ovo.status = 'available'
if model_update:
new_vol._ovo.update(model_update)
self.backend._volume_created(new_vol)
except Exception:
new_vol._ovo.status = 'error'
new_vol._raise_with_resource()
finally:
new_vol.save()
return new_vol
[docs] def create_snapshot(self, name='', description='', **kwargs):
snap = Snapshot(self, name=name, description=description, **kwargs)
try:
snap.create()
finally:
if self._snapshots is not None:
self._snapshots.append(snap)
self._ovo.snapshots.objects.append(snap._ovo)
return snap
[docs] def attach(self):
connector_dict = brick_connector.get_connector_properties(
self.backend_class.root_helper,
cfg.CONF.my_ip,
self.backend.configuration.use_multipath_for_image_xfer,
self.backend.configuration.enforce_multipath_for_image_xfer)
conn = self.connect(connector_dict)
try:
conn.attach()
except Exception:
self.disconnect(conn)
raise
return conn
[docs] def detach(self, force=False, ignore_errors=False):
if not self.local_attach:
raise exception.NotLocal(self.id)
exc = brick_exception.ExceptionChainer()
conn = self.local_attach
try:
conn.detach(force, ignore_errors, exc)
except Exception:
if not force:
raise
with exc.context(force, 'Unable to disconnect'):
conn.disconnect(force)
if exc and not ignore_errors:
raise exc
[docs] def connect(self, connector_dict, **ovo_fields):
model_update = self.backend.driver.create_export(self.CONTEXT,
self._ovo,
connector_dict)
if model_update:
self._ovo.update(model_update)
self.save()
try:
conn = Connection.connect(self, connector_dict, **ovo_fields)
if self._connections is not None:
self._connections.append(conn)
ovo_conns = getattr(self._ovo, CONNECTIONS_OVO_FIELD).objects
ovo_conns.append(conn._ovo)
self._ovo.status = 'in-use'
self.save()
except Exception:
self._remove_export()
self._raise_with_resource()
return conn
def _disconnect(self, connection):
self._remove_export()
self._connection_removed(connection)
if not self.connections:
self._ovo.status = 'available'
self.save()
[docs] def disconnect(self, connection, force=False):
connection._disconnect(force)
self._disconnect(connection)
[docs] def cleanup(self):
for attach in self.connections:
attach.detach()
self._remove_export()
def _remove_export(self):
self.backend.driver.remove_export(self._context, self._ovo)
[docs] def refresh(self):
last_self = self.get_by_id(self.id)
if self._snapshots is not None:
last_self.snapshots
if self._connections is not None:
last_self.connections
vars(self).clear()
vars(self).update(vars(last_self))
[docs] def save(self):
self.persistence.set_volume(self)
[docs]class Connection(Object, LazyVolumeAttr):
"""Cinderlib Connection info that maps to VolumeAttachment.
On Pike we don't have the connector field on the VolumeAttachment ORM
instance so we use the connection_info to store everything.
We'll have a dictionary:
{'conn': connection info
'connector': connector dictionary
'device': result of connect_volume}
"""
OVO_CLASS = cinder_objs.VolumeAttachment
SIMPLE_JSON_IGNORE = ('volume',)
[docs] @classmethod
def connect(cls, volume, connector, **kwargs):
conn_info = volume.backend.driver.initialize_connection(
volume._ovo, connector)
conn = cls(volume.backend,
connector=connector,
volume=volume,
status='attached',
connection_info={'conn': conn_info},
**kwargs)
conn.connector_info = connector
conn.save()
return conn
@staticmethod
def _is_multipathed_conn(kwargs):
# Priority:
# - kwargs['use_multipath']
# - Multipath in connector_dict in kwargs or _ovo
# - Detect from connection_info data from OVO in kwargs
if 'use_multipath' in kwargs:
return kwargs['use_multipath']
connector = kwargs.get('connector') or {}
conn_info = kwargs.get('connection_info') or {}
if '__ovo' in kwargs:
ovo = kwargs['__ovo']
conn_info = conn_info or ovo.connection_info or {}
connector = connector or ovo.connection_info.get('connector') or {}
if 'multipath' in connector:
return connector['multipath']
# If multipathed not defined autodetect based on connection info
conn_info = conn_info['conn'].get('data', {})
iscsi_mp = 'target_iqns' in conn_info and 'target_portals' in conn_info
fc_mp = not isinstance(conn_info.get('target_wwn', ''),
six.string_types)
return iscsi_mp or fc_mp
def __init__(self, *args, **kwargs):
self.use_multipath = self._is_multipathed_conn(kwargs)
scan_attempts = brick_initiator.DEVICE_SCAN_ATTEMPTS_DEFAULT
self.scan_attempts = kwargs.pop('device_scan_attempts', scan_attempts)
volume = kwargs.pop('volume', None)
self._connector = None
super(Connection, self).__init__(*args, **kwargs)
LazyVolumeAttr.__init__(self, volume)
# Attributes could be coming from __ovo, so we need to do this after
# all the initialization.
data = self.conn_info.get('data', {})
if not (self._ovo.obj_attr_is_set('attach_mode') and self.attach_mode):
self._ovo.attach_mode = data.get('access_mode', 'rw')
if data:
data['access_mode'] = self.attach_mode
@property
def conn_info(self):
conn_info = self._ovo.connection_info
if conn_info:
return conn_info.get('conn')
return {}
@conn_info.setter
def conn_info(self, value):
if not value:
self._ovo.connection_info = None
return
if self._ovo.connection_info is None:
self._ovo.connection_info = {}
# access_mode in the connection_info is set on __init__, here we ensure
# it's also set whenever we change the connection_info out of __init__.
if 'data' in value:
mode = value['data'].setdefault('access_mode', self.attach_mode)
# Keep attach_mode in sync.
self._ovo.attach_mode = mode
self._ovo.connection_info['conn'] = value
@property
def protocol(self):
return self.conn_info.get('driver_volume_type')
@property
def connector_info(self):
if self.connection_info:
return self.connection_info.get('connector')
return None
@connector_info.setter
def connector_info(self, value):
if self._ovo.connection_info is None:
self._ovo.connection_info = {}
self.connection_info['connector'] = value
# Since we are changing the dictionary the OVO won't detect the change
self._changed_fields.add('connection_info')
@property
def device(self):
if self.connection_info:
return self.connection_info.get('device')
return None
@device.setter
def device(self, value):
if value:
self.connection_info['device'] = value
else:
self.connection_info.pop('device', None)
# Since we are changing the dictionary the OVO won't detect the change
self._changed_fields.add('connection_info')
@property
def path(self):
device = self.device
if not device:
return None
return device['path']
@property
def connector(self):
if not self._connector:
if not self.conn_info:
return None
self._connector = brick_connector.InitiatorConnector.factory(
self.protocol, self.backend_class.root_helper,
use_multipath=self.use_multipath,
device_scan_attempts=self.scan_attempts,
# NOTE(geguileo): afaik only remotefs uses the connection info
conn=self.conn_info,
do_local_attach=True)
return self._connector
@property
def attached(self):
return bool(self.device)
@property
def connected(self):
return bool(self.conn_info)
@classmethod
def _load(cls, backend, ovo, volume=None, save=False):
# We let the __init__ method set the _volume if exists
conn = cls(backend, __ovo=ovo, volume=volume)
if save:
conn.save()
# Restore circular reference only if we have all the elements
if conn._volume:
utils.add_by_id(conn, conn._volume._connections)
connections = getattr(conn._volume._ovo,
CONNECTIONS_OVO_FIELD).objects
utils.add_by_id(conn._ovo, connections)
return conn
def _disconnect(self, force=False):
self.backend.driver.terminate_connection(self.volume._ovo,
self.connector_info,
force=force)
self.conn_info = None
self._ovo.status = 'detached'
self.persistence.delete_connection(self)
[docs] def disconnect(self, force=False):
self._disconnect(force)
self.volume._disconnect(self)
[docs] def device_attached(self, device):
self.device = device
self.save()
[docs] def attach(self):
device = self.connector.connect_volume(self.conn_info['data'])
self.device_attached(device)
try:
if self.connector.check_valid_device(self.path):
error_msg = None
else:
error_msg = ('Unable to access the backend storage via path '
'%s.' % self.path)
except Exception:
error_msg = ('Could not validate device %s. There may be missing '
'packages on your host.' % self.path)
LOG.exception(error_msg)
if error_msg:
self.detach(force=True, ignore_errors=True)
raise cinder_exception.DeviceUnavailable(
path=self.path, attach_info=self._ovo.connection_info,
reason=error_msg)
if self._volume:
self.volume.local_attach = self
[docs] def detach(self, force=False, ignore_errors=False, exc=None):
if not exc:
exc = brick_exception.ExceptionChainer()
with exc.context(force, 'Disconnect failed'):
self.connector.disconnect_volume(self.conn_info['data'],
self.device,
force=force,
ignore_errors=ignore_errors)
if not exc or ignore_errors:
if self._volume:
self.volume.local_attach = None
self.device = None
self.save()
self._connector = None
if exc and not ignore_errors:
raise exc
[docs] @classmethod
def get_by_id(cls, connection_id):
result = cls.persistence.get_connections(connection_id=connection_id)
if not result:
msg = 'id=%s' % connection_id
raise exception.ConnectionNotFound(filter=msg)
return result[0]
@property
def backend(self):
if self._backend is None and hasattr(self, '_volume'):
self._backend = self.volume.backend
return self._backend
@backend.setter
def backend(self, value):
self._backend = value
[docs] def save(self):
self.persistence.set_connection(self)
[docs] def extend(self):
return self.connector.extend_volume(self.conn_info['data'])
[docs]class Snapshot(NamedObject, LazyVolumeAttr):
OVO_CLASS = cinder_objs.Snapshot
SIMPLE_JSON_IGNORE = ('volume',)
DEFAULT_FIELDS_VALUES = {
'status': 'creating',
'metadata': {},
}
def __init__(self, volume, **kwargs):
param_backend = self._get_backend(kwargs.pop('backend', None))
if '__ovo' in kwargs:
backend = kwargs['__ovo'][BACKEND_NAME_SNAPSHOT_FIELD]
else:
kwargs.setdefault('user_id', volume.user_id)
kwargs.setdefault('project_id', volume.project_id)
kwargs['volume_id'] = volume.id
kwargs['volume_size'] = volume.size
kwargs['volume_type_id'] = volume.volume_type_id
kwargs['volume'] = volume._ovo
if volume:
backend = volume.backend.id
kwargs[BACKEND_NAME_SNAPSHOT_FIELD] = backend
else:
backend = param_backend and param_backend.id
if not (backend or param_backend):
raise ValueError('Backend not provided')
if backend and param_backend and param_backend.id != backend:
raise ValueError("Multiple backends provided and they don't match")
super(Snapshot, self).__init__(backend=param_backend or backend,
**kwargs)
LazyVolumeAttr.__init__(self, volume)
@classmethod
def _load(cls, backend, ovo, volume=None, save=False):
# We let the __init__ method set the _volume if exists
snap = cls(volume, backend=backend, __ovo=ovo)
if save:
snap.save()
# Restore circular reference only if we have all the elements
if snap._volume:
utils.add_by_id(snap, snap._volume._snapshots)
utils.add_by_id(snap._ovo, snap._volume._ovo.snapshots.objects)
return snap
[docs] def create(self):
try:
model_update = self.backend.driver.create_snapshot(self._ovo)
self._ovo.status = 'available'
if model_update:
self._ovo.update(model_update)
except Exception:
self._ovo.status = 'error'
self._raise_with_resource()
finally:
self.save()
[docs] def delete(self):
try:
self.backend.driver.delete_snapshot(self._ovo)
self.persistence.delete_snapshot(self)
self._ovo.status = 'deleted'
except Exception:
self._ovo.status = 'error_deleting'
self.save()
self._raise_with_resource()
if self._volume is not None:
self._volume._snapshot_removed(self)
[docs] def create_volume(self, **new_vol_params):
new_vol_params.setdefault('size', self.volume_size)
new_vol_params['snapshot_id'] = self.id
new_vol = Volume(self.volume, **new_vol_params)
self.backend._start_creating_volume(new_vol)
try:
model_update = self.backend.driver.create_volume_from_snapshot(
new_vol._ovo, self._ovo)
new_vol._ovo.status = 'available'
if model_update:
new_vol._ovo.update(model_update)
self.backend._volume_created(new_vol)
except Exception:
new_vol._ovo.status = 'error'
new_vol._raise_with_resource()
finally:
new_vol.save()
return new_vol
[docs] @classmethod
def get_by_id(cls, snapshot_id):
result = cls.persistence.get_snapshots(snapshot_id=snapshot_id)
if not result:
raise exception.SnapshotNotFound(snapshot_id=snapshot_id)
return result[0]
[docs] @classmethod
def get_by_name(cls, snapshot_name):
return cls.persistence.get_snapshots(snapshot_name=snapshot_name)
[docs] def save(self):
self.persistence.set_snapshot(self)
setup = Object.setup
CONTEXT = Object.CONTEXT
