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
require 'fog/aws'
require 'carrierwave/storage/fog'
#
# This concern should add object storage support
# to the GitlabUploader class
#
module ObjectStorage
RemoteStoreError = Class.new(StandardError)
UnknownStoreError = Class.new(StandardError)
ObjectStorageUnavailable = Class.new(StandardError)
module Store
LOCAL = 1
REMOTE = 2
end
module Extension
# this extension is the glue between the ObjectStorage::Concern and RecordsUploads::Concern
module RecordsUploads
extend ActiveSupport::Concern
def prepended(base)
raise "#{base} must include ObjectStorage::Concern to use extensions." unless base < Concern
base.include(RecordsUploads::Concern)
end
def retrieve_from_store!(identifier)
paths = store_dirs.map { |store, path| File.join(path, identifier) }
unless current_upload_satisfies?(paths, model)
# the upload we already have isn't right, find the correct one
self.upload = uploads.find_by(model: model, path: paths)
end
super
end
def build_upload
super.tap do |upload|
upload.store = object_store
end
end
def upload=(upload)
return unless upload
self.object_store = upload.store
super
end
def schedule_background_upload(*args)
return unless schedule_background_upload?
return unless upload
ObjectStorage::BackgroundMoveWorker.perform_async(self.class.name,
upload.class.to_s,
mounted_as,
upload.id)
end
private
def current_upload_satisfies?(paths, model)
return false unless upload
return false unless model
paths.include?(upload.path) &&
upload.model_id == model.id &&
upload.model_type == model.class.base_class.sti_name
end
end
end
# Add support for automatic background uploading after the file is stored.
#
module BackgroundMove
extend ActiveSupport::Concern
def background_upload(mount_points = [])
return unless mount_points.any?
run_after_commit do
mount_points.each { |mount| send(mount).schedule_background_upload } # rubocop:disable GitlabSecurity/PublicSend
end
end
def changed_mounts
self.class.uploaders.select do |mount, uploader_class|
mounted_as = uploader_class.serialization_column(self.class, mount)
uploader = send(:"#{mounted_as}") # rubocop:disable GitlabSecurity/PublicSend
next unless uploader
next unless uploader.exists?
next unless send(:"#{mounted_as}_changed?") # rubocop:disable GitlabSecurity/PublicSend
mount
end.keys
end
included do
after_save on: [:create, :update] do
background_upload(changed_mounts)
end
end
end
module Concern
extend ActiveSupport::Concern
included do |base|
base.include(ObjectStorage)
after :migrate, :delete_migrated_file
end
class_methods do
def object_store_options
options.object_store
end
def object_store_enabled?
object_store_options.enabled
end
def background_upload_enabled?
object_store_options.background_upload
end
def proxy_download_enabled?
object_store_options.proxy_download
end
def direct_download_enabled?
!proxy_download_enabled?
end
def object_store_credentials
object_store_options.connection.to_hash.deep_symbolize_keys
end
def remote_store_path
object_store_options.remote_directory
end
def serialization_column(model_class, mount_point)
model_class.uploader_options.dig(mount_point, :mount_on) || mount_point
end
end
def file_storage?
storage.is_a?(CarrierWave::Storage::File)
end
def file_cache_storage?
cache_storage.is_a?(CarrierWave::Storage::File)
end
def object_store
@object_store ||= model.try(store_serialization_column) || Store::LOCAL
end
# rubocop:disable Gitlab/ModuleWithInstanceVariables
def object_store=(value)
@object_store = value || Store::LOCAL
@storage = storage_for(object_store)
end
# rubocop:enable Gitlab/ModuleWithInstanceVariables
# Return true if the current file is part or the model (i.e. is mounted in the model)
#
def persist_object_store?
model.respond_to?(:"#{store_serialization_column}=")
end
# Save the current @object_store to the model <mounted_as>_store column
def persist_object_store!
return unless persist_object_store?
updated = model.update_column(store_serialization_column, object_store)
raise 'Failed to update object store' unless updated
end
def use_file
if file_storage?
return yield path
end
begin
cache_stored_file!
yield cache_path
ensure
cache_storage.delete_dir!(cache_path(nil))
end
end
def filename
super || file&.filename
end
#
# Move the file to another store
#
# new_store: Enum (Store::LOCAL, Store::REMOTE)
#
def migrate!(new_store)
uuid = Gitlab::ExclusiveLease.new(exclusive_lease_key, timeout: 1.hour.to_i).try_obtain
raise 'Already running' unless uuid
unsafe_migrate!(new_store)
ensure
Gitlab::ExclusiveLease.cancel(exclusive_lease_key, uuid)
end
def schedule_background_upload(*args)
return unless schedule_background_upload?
ObjectStorage::BackgroundMoveWorker.perform_async(self.class.name,
model.class.name,
mounted_as,
model.id)
end
def fog_directory
self.class.remote_store_path
end
def fog_credentials
self.class.object_store_credentials
end
def fog_public
false
end
def delete_migrated_file(migrated_file)
migrated_file.delete if exists?
end
def exists?
file.present?
end
def store_dir(store = nil)
store_dirs[store || object_store]
end
def store_dirs
{
Store::LOCAL => File.join(base_dir, dynamic_segment),
Store::REMOTE => File.join(dynamic_segment)
}
end
private
def schedule_background_upload?
self.class.object_store_enabled? &&
self.class.background_upload_enabled? &&
self.file_storage?
end
# this is a hack around CarrierWave. The #migrate method needs to be
# able to force the current file to the migrated file upon success.
def file=(file)
@file = file # rubocop:disable Gitlab/ModuleWithInstanceVariables
end
def serialization_column
self.class.serialization_column(model.class, mounted_as)
end
# Returns the column where the 'store' is saved
# defaults to 'store'
def store_serialization_column
[serialization_column, 'store'].compact.join('_').to_sym
end
def storage
@storage ||= storage_for(object_store)
end
def storage_for(store)
case store
when Store::REMOTE
raise 'Object Storage is not enabled' unless self.class.object_store_enabled?
CarrierWave::Storage::Fog.new(self)
when Store::LOCAL
CarrierWave::Storage::File.new(self)
else
raise UnknownStoreError
end
end
def exclusive_lease_key
"object_storage_migrate:#{model.class}:#{model.id}"
end
#
# Move the file to another store
#
# new_store: Enum (Store::LOCAL, Store::REMOTE)
#
def unsafe_migrate!(new_store)
return unless object_store != new_store
return unless file
new_file = nil
file_to_delete = file
from_object_store = object_store
self.object_store = new_store # changes the storage and file
cache_stored_file! if file_storage?
with_callbacks(:migrate, file_to_delete) do
with_callbacks(:store, file_to_delete) do # for #store_versions!
new_file = storage.store!(file)
persist_object_store!
self.file = new_file
end
end
file
rescue => e
# in case of failure delete new file
new_file.delete unless new_file.nil?
# revert back to the old file
self.object_store = from_object_store
self.file = file_to_delete
raise e
end
end
end