-
Notifications
You must be signed in to change notification settings - Fork 909
/
snapshot.py
355 lines (296 loc) · 14.6 KB
/
snapshot.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
# Copyright 2015 SimpliVity Corp.
#
# 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 oslo_config import cfg
from oslo_versionedobjects import fields
from cinder import db
from cinder import exception
from cinder.i18n import _
from cinder import objects
from cinder.objects import base
from cinder.objects import cleanable
from cinder.objects import fields as c_fields
from cinder.volume import volume_types
CONF = cfg.CONF
@base.CinderObjectRegistry.register
class Snapshot(cleanable.CinderCleanableObject, base.CinderObject,
base.CinderObjectDictCompat, base.CinderComparableObject,
base.ClusteredObject):
# Version 1.0: Initial version
# Version 1.1: Changed 'status' field to use SnapshotStatusField
# Version 1.2: This object is now cleanable (adds rows to workers table)
# Version 1.3: SnapshotStatusField now includes "unmanaging"
# Version 1.4: SnapshotStatusField now includes "backing-up"
# Version 1.5: SnapshotStatusField now includes "restoring"
# Version 1.6: Added use_quota
VERSION = '1.6'
# NOTE(thangp): OPTIONAL_FIELDS are fields that would be lazy-loaded. They
# are typically the relationship in the sqlalchemy object.
OPTIONAL_FIELDS = ('volume', 'metadata', 'cgsnapshot', 'group_snapshot')
# NOTE: When adding a field obj_make_compatible needs to be updated
fields = {
'id': fields.UUIDField(),
'user_id': fields.StringField(nullable=True),
'project_id': fields.StringField(nullable=True),
'use_quota': fields.BooleanField(default=True, nullable=False),
'volume_id': fields.UUIDField(nullable=True),
'cgsnapshot_id': fields.UUIDField(nullable=True),
'group_snapshot_id': fields.UUIDField(nullable=True),
'status': c_fields.SnapshotStatusField(nullable=True),
'progress': fields.StringField(nullable=True),
'volume_size': fields.IntegerField(nullable=True),
'display_name': fields.StringField(nullable=True),
'display_description': fields.StringField(nullable=True),
'encryption_key_id': fields.UUIDField(nullable=True),
'volume_type_id': fields.UUIDField(nullable=True),
'provider_location': fields.StringField(nullable=True),
'provider_id': fields.StringField(nullable=True),
'metadata': fields.DictOfStringsField(),
'provider_auth': fields.StringField(nullable=True),
'volume': fields.ObjectField('Volume', nullable=True),
'cgsnapshot': fields.ObjectField('CGSnapshot', nullable=True),
'group_snapshot': fields.ObjectField('GroupSnapshot', nullable=True),
}
@property
def cluster_name(self):
return self.volume.cluster_name
@classmethod
def _get_expected_attrs(cls, context, *args, **kwargs):
return 'metadata',
# NOTE(thangp): obj_extra_fields is used to hold properties that are not
# usually part of the model
obj_extra_fields = ['name', 'volume_name']
@property
def name(self):
return CONF.snapshot_name_template % self.id
@property
def volume_name(self):
return self.volume.name
def __init__(self, *args, **kwargs):
super(Snapshot, self).__init__(*args, **kwargs)
self.metadata = kwargs.get('metadata', {})
self._reset_metadata_tracking()
def obj_reset_changes(self, fields=None):
super(Snapshot, self).obj_reset_changes(fields)
self._reset_metadata_tracking(fields=fields)
def _reset_metadata_tracking(self, fields=None):
if fields is None or 'metadata' in fields:
self._orig_metadata = (dict(self.metadata)
if self.obj_attr_is_set('metadata') else {})
def obj_what_changed(self):
changes = super(Snapshot, self).obj_what_changed()
if hasattr(self, 'metadata') and self.metadata != self._orig_metadata:
changes.add('metadata')
return changes
@classmethod
def _from_db_object(cls, context, snapshot, db_snapshot,
expected_attrs=None):
if expected_attrs is None:
expected_attrs = []
for name, field in snapshot.fields.items():
if name in cls.OPTIONAL_FIELDS:
continue
value = db_snapshot.get(name)
if isinstance(field, fields.IntegerField):
value = value if value is not None else 0
setattr(snapshot, name, value)
if 'volume' in expected_attrs:
volume = objects.Volume(context)
volume._from_db_object(context, volume, db_snapshot['volume'])
snapshot.volume = volume
if snapshot.cgsnapshot_id and 'cgsnapshot' in expected_attrs:
cgsnapshot = objects.CGSnapshot(context)
cgsnapshot._from_db_object(context, cgsnapshot,
db_snapshot['cgsnapshot'])
snapshot.cgsnapshot = cgsnapshot
if snapshot.group_snapshot_id and 'group_snapshot' in expected_attrs:
group_snapshot = objects.GroupSnapshot(context)
group_snapshot._from_db_object(context, group_snapshot,
db_snapshot['group_snapshot'])
snapshot.group_snapshot = group_snapshot
if 'metadata' in expected_attrs:
metadata = db_snapshot.get('snapshot_metadata')
if metadata is None:
raise exception.MetadataAbsent()
snapshot.metadata = {item['key']: item['value']
for item in metadata}
snapshot._context = context
snapshot.obj_reset_changes()
return snapshot
def create(self):
if self.obj_attr_is_set('id'):
raise exception.ObjectActionError(action='create',
reason=_('already created'))
updates = self.cinder_obj_get_changes()
if 'volume' in updates:
raise exception.ObjectActionError(action='create',
reason=_('volume assigned'))
if 'cgsnapshot' in updates:
raise exception.ObjectActionError(action='create',
reason=_('cgsnapshot assigned'))
if 'cluster' in updates:
raise exception.ObjectActionError(
action='create', reason=_('cluster assigned'))
if 'group_snapshot' in updates:
raise exception.ObjectActionError(
action='create',
reason=_('group_snapshot assigned'))
if ('volume_type_id' not in updates or
updates['volume_type_id'] is None):
updates['volume_type_id'] = (
volume_types.get_default_volume_type()['id'])
db_snapshot = db.snapshot_create(self._context, updates)
self._from_db_object(self._context, self, db_snapshot)
def save(self):
updates = self.cinder_obj_get_changes()
if updates:
if 'volume' in updates:
raise exception.ObjectActionError(action='save',
reason=_('volume changed'))
if 'cgsnapshot' in updates:
# NOTE(xyang): Allow this to pass if 'cgsnapshot' is
# set to None. This is to support backward compatibility.
if updates.get('cgsnapshot'):
raise exception.ObjectActionError(
action='save', reason=_('cgsnapshot changed'))
if 'group_snapshot' in updates:
raise exception.ObjectActionError(
action='save', reason=_('group_snapshot changed'))
if 'cluster' in updates:
raise exception.ObjectActionError(
action='save', reason=_('cluster changed'))
if 'metadata' in updates:
# Metadata items that are not specified in the
# self.metadata will be deleted
metadata = updates.pop('metadata', None)
self.metadata = db.snapshot_metadata_update(self._context,
self.id, metadata,
True)
db.snapshot_update(self._context, self.id, updates)
self.obj_reset_changes()
def destroy(self):
with self.obj_as_admin():
updated_values = db.snapshot_destroy(self._context, self.id)
self.update(updated_values)
self.obj_reset_changes(updated_values.keys())
def obj_load_attr(self, attrname):
if attrname not in self.OPTIONAL_FIELDS:
raise exception.ObjectActionError(
action='obj_load_attr',
reason=_('attribute %s not lazy-loadable') % attrname)
if not self._context:
raise exception.OrphanedObjectError(method='obj_load_attr',
objtype=self.obj_name())
if attrname == 'volume':
self.volume = objects.Volume.get_by_id(self._context,
self.volume_id)
if attrname == 'cgsnapshot':
if self.cgsnapshot_id is None:
self.cgsnapshot = None
else:
self.cgsnapshot = objects.CGSnapshot.get_by_id(
self._context, self.cgsnapshot_id)
if attrname == 'group_snapshot':
if self.group_snapshot_id is None:
self.group_snapshot = None
else:
self.group_snapshot = objects.GroupSnapshot.get_by_id(
self._context,
self.group_snapshot_id)
self.obj_reset_changes(fields=[attrname])
def delete_metadata_key(self, context, key):
db.snapshot_metadata_delete(context, self.id, key)
md_was_changed = 'metadata' in self.obj_what_changed()
del self.metadata[key]
self._orig_metadata.pop(key, None)
if not md_was_changed:
self.obj_reset_changes(['metadata'])
@classmethod
def snapshot_data_get_for_project(cls, context, project_id,
volume_type_id=None, host=None):
return db.snapshot_data_get_for_project(context, project_id,
volume_type_id,
host=host)
@staticmethod
def _is_cleanable(status, obj_version):
# Before 1.2 we didn't have workers table, so cleanup wasn't supported.
if obj_version and obj_version < 1.2:
return False
return status == 'creating'
@property
def host(self):
"""All cleanable VO must have a host property/attribute."""
return self.volume.host
@base.CinderObjectRegistry.register
class SnapshotList(base.ObjectListBase, base.CinderObject):
VERSION = '1.0'
fields = {
'objects': fields.ListOfObjectsField('Snapshot'),
}
@classmethod
def get_all(cls, context, filters, marker=None, limit=None,
sort_keys=None, sort_dirs=None, offset=None):
"""Get all snapshot given some search_opts (filters).
Special filters accepted are host and cluster_name, that refer to the
volume's fields.
"""
snapshots = db.snapshot_get_all(context, filters, marker, limit,
sort_keys, sort_dirs, offset)
expected_attrs = Snapshot._get_expected_attrs(context)
return base.obj_make_list(context, cls(context), objects.Snapshot,
snapshots, expected_attrs=expected_attrs)
@classmethod
def get_by_host(cls, context, host, filters=None):
snapshots = db.snapshot_get_all_by_host(context, host, filters)
expected_attrs = Snapshot._get_expected_attrs(context)
return base.obj_make_list(context, cls(context), objects.Snapshot,
snapshots, expected_attrs=expected_attrs)
@classmethod
def get_all_by_project(cls, context, project_id, search_opts, marker=None,
limit=None, sort_keys=None, sort_dirs=None,
offset=None):
snapshots = db.snapshot_get_all_by_project(
context, project_id, search_opts, marker, limit, sort_keys,
sort_dirs, offset)
expected_attrs = Snapshot._get_expected_attrs(context)
return base.obj_make_list(context, cls(context), objects.Snapshot,
snapshots, expected_attrs=expected_attrs)
@classmethod
def get_all_for_volume(cls, context, volume_id):
snapshots = db.snapshot_get_all_for_volume(context, volume_id)
expected_attrs = Snapshot._get_expected_attrs(context)
return base.obj_make_list(context, cls(context), objects.Snapshot,
snapshots, expected_attrs=expected_attrs)
@classmethod
def get_all_active_by_window(cls, context, begin, end):
snapshots = db.snapshot_get_all_active_by_window(context, begin, end)
expected_attrs = Snapshot._get_expected_attrs(context)
return base.obj_make_list(context, cls(context), objects.Snapshot,
snapshots, expected_attrs=expected_attrs)
@classmethod
def get_all_for_cgsnapshot(cls, context, cgsnapshot_id):
snapshots = db.snapshot_get_all_for_cgsnapshot(context, cgsnapshot_id)
expected_attrs = Snapshot._get_expected_attrs(context)
return base.obj_make_list(context, cls(context), objects.Snapshot,
snapshots, expected_attrs=expected_attrs)
@classmethod
def get_all_for_group_snapshot(cls, context, group_snapshot_id):
snapshots = db.snapshot_get_all_for_group_snapshot(
context, group_snapshot_id)
expected_attrs = Snapshot._get_expected_attrs(context)
return base.obj_make_list(context, cls(context), objects.Snapshot,
snapshots, expected_attrs=expected_attrs)
@classmethod
def get_snapshot_summary(cls, context, project_only, filters=None):
summary = db.get_snapshot_summary(context, project_only, filters)
return summary