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
|
# See http://doc.gitlab.com/ce/development/migration_style_guide.html
# for more information on how to write migrations for GitLab.
class RemoveSoftRemovedObjects < ActiveRecord::Migration
include Gitlab::Database::MigrationHelpers
# Set this constant to true if this migration requires downtime.
DOWNTIME = false
disable_ddl_transaction!
module SoftRemoved
extend ActiveSupport::Concern
included do
scope :soft_removed, -> { where('deleted_at IS NOT NULL') }
end
end
class User < ActiveRecord::Base
self.table_name = 'users'
include EachBatch
end
class Issue < ActiveRecord::Base
self.table_name = 'issues'
include EachBatch
include SoftRemoved
end
class MergeRequest < ActiveRecord::Base
self.table_name = 'merge_requests'
include EachBatch
include SoftRemoved
end
class Namespace < ActiveRecord::Base
self.table_name = 'namespaces'
include EachBatch
include SoftRemoved
scope :soft_removed_personal, -> { soft_removed.where(type: nil) }
scope :soft_removed_group, -> { soft_removed.where(type: 'Group') }
end
class Route < ActiveRecord::Base
self.table_name = 'routes'
include EachBatch
include SoftRemoved
end
class Project < ActiveRecord::Base
self.table_name = 'projects'
include EachBatch
include SoftRemoved
end
class CiPipelineSchedule < ActiveRecord::Base
self.table_name = 'ci_pipeline_schedules'
include EachBatch
include SoftRemoved
end
class CiTrigger < ActiveRecord::Base
self.table_name = 'ci_triggers'
include EachBatch
include SoftRemoved
end
MODELS = [Issue, MergeRequest, CiPipelineSchedule, CiTrigger].freeze
def up
disable_statement_timeout
remove_personal_routes
remove_personal_namespaces
remove_group_namespaces
remove_simple_soft_removed_rows
end
def down
# The data removed by this migration can't be restored in an automated way.
end
def remove_simple_soft_removed_rows
create_temporary_indexes
MODELS.each do |model|
say_with_time("Removing soft removed rows from #{model.table_name}") do
model.soft_removed.each_batch do |batch, index|
batch.delete_all
end
end
end
ensure
remove_temporary_indexes
end
def create_temporary_indexes
MODELS.each do |model|
index_name = temporary_index_name_for(model)
# Without this index the removal process can take a very long time. For
# example, getting the next ID of a batch for the `issues` table in
# staging would take between 15 and 20 seconds.
next if temporary_index_exists?(model)
say_with_time("Creating temporary index #{index_name}") do
add_concurrent_index(
model.table_name,
[:deleted_at, :id],
name: index_name,
where: 'deleted_at IS NOT NULL'
)
end
end
end
def remove_temporary_indexes
MODELS.each do |model|
index_name = temporary_index_name_for(model)
next unless temporary_index_exists?(model)
say_with_time("Removing temporary index #{index_name}") do
remove_concurrent_index_by_name(model.table_name, index_name)
end
end
end
def temporary_index_name_for(model)
"index_on_#{model.table_name}_tmp"
end
def temporary_index_exists?(model)
index_name = temporary_index_name_for(model)
index_exists?(model.table_name, [:deleted_at, :id], name: index_name)
end
def remove_personal_namespaces
# Some personal namespaces are left behind in case of GitLab.com. In these
# cases the associated data such as the projects and users has already been
# removed.
Namespace.soft_removed_personal.each_batch do |batch|
batch.delete_all
end
end
def remove_group_namespaces
admin_id = id_for_admin_user
unless admin_id
say 'Not scheduling soft removed groups for removal as no admin user ' \
'could be found. You will need to remove any such groups manually.'
return
end
# Left over groups can't be easily removed because we may also need to
# remove memberships, repositories, and other associated data. As a result
# we'll just schedule a Sidekiq job to remove these.
#
# As of January 5th, 2018 there are 36 groups that will be removed using
# this code.
Namespace.select(:id).soft_removed_group.each_batch(of: 10) do |batch, index|
batch.each do |ns|
schedule_group_removal(index * 5.minutes, ns.id, admin_id)
end
end
end
def schedule_group_removal(delay, group_id, user_id)
if migrate_inline?
GroupDestroyWorker.new.perform(group_id, user_id)
else
GroupDestroyWorker.perform_in(delay, group_id, user_id)
end
end
def remove_personal_routes
namespaces = Namespace.select(1)
.soft_removed
.where('namespaces.type IS NULL')
.where('routes.source_type = ?', 'Namespace')
.where('routes.source_id = namespaces.id')
Route.where('EXISTS (?)', namespaces).each_batch do |batch|
batch.delete_all
end
end
def id_for_admin_user
User.where(admin: true).limit(1).pluck(:id).first
end
def migrate_inline?
Rails.env.test? || Rails.env.development?
end
end
|