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
|
# Copyright 2013 OpenStack Foundation
# Copyright 2013 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.
import os
import sys
import migrate
from migrate import exceptions
from oslo_config import cfg
from oslo_db.sqlalchemy import migration
from oslo_serialization import jsonutils
from oslo_utils import importutils
import six
import sqlalchemy
from keystone.common import sql
from keystone.common.sql import migrate_repo
from keystone import contrib
from keystone import exception
from keystone.i18n import _
CONF = cfg.CONF
DEFAULT_EXTENSIONS = ['endpoint_filter',
'endpoint_policy',
'federation',
'oauth1',
'revoke',
]
def get_default_domain():
# Return the reference used for the default domain structure during
# sql migrations.
return {
'id': CONF.identity.default_domain_id,
'name': 'Default',
'enabled': True,
'extra': jsonutils.dumps({'description': 'Owns users and tenants '
'(i.e. projects) available '
'on Identity API v2.'})}
# Different RDBMSs use different schemes for naming the Foreign Key
# Constraints. SQLAlchemy does not yet attempt to determine the name
# for the constraint, and instead attempts to deduce it from the column.
# This fails on MySQL.
def get_constraints_names(table, column_name):
fkeys = [fk.name for fk in table.constraints
if (isinstance(fk, sqlalchemy.ForeignKeyConstraint) and
column_name in fk.columns)]
return fkeys
# remove_constraints and add_constraints both accept a list of dictionaries
# that contain:
# {'table': a sqlalchemy table. The constraint is added to dropped from
# this table.
# 'fk_column': the name of a column on the above table, The constraint
# is added to or dropped from this column
# 'ref_column':a sqlalchemy column object. This is the reference column
# for the constraint.
def remove_constraints(constraints):
for constraint_def in constraints:
constraint_names = get_constraints_names(constraint_def['table'],
constraint_def['fk_column'])
for constraint_name in constraint_names:
migrate.ForeignKeyConstraint(
columns=[getattr(constraint_def['table'].c,
constraint_def['fk_column'])],
refcolumns=[constraint_def['ref_column']],
name=constraint_name).drop()
def add_constraints(constraints):
for constraint_def in constraints:
if constraint_def['table'].kwargs.get('mysql_engine') == 'MyISAM':
# Don't try to create constraint when using MyISAM because it's
# not supported.
continue
ref_col = constraint_def['ref_column']
ref_engine = ref_col.table.kwargs.get('mysql_engine')
if ref_engine == 'MyISAM':
# Don't try to create constraint when using MyISAM because it's
# not supported.
continue
migrate.ForeignKeyConstraint(
columns=[getattr(constraint_def['table'].c,
constraint_def['fk_column'])],
refcolumns=[constraint_def['ref_column']]).create()
def rename_tables_with_constraints(renames, constraints, engine):
"""Renames tables with foreign key constraints.
Tables are renamed after first removing constraints. The constraints are
replaced after the rename is complete.
This works on databases that don't support renaming tables that have
constraints on them (DB2).
`renames` is a dict, mapping {'to_table_name': from_table, ...}
"""
if engine.name != 'sqlite':
# Sqlite doesn't support constraints, so nothing to remove.
remove_constraints(constraints)
for to_table_name in renames:
from_table = renames[to_table_name]
from_table.rename(to_table_name)
if engine != 'sqlite':
add_constraints(constraints)
def find_migrate_repo(package=None, repo_name='migrate_repo'):
package = package or sql
path = os.path.abspath(os.path.join(
os.path.dirname(package.__file__), repo_name))
if os.path.isdir(path):
return path
raise exception.MigrationNotProvided(package.__name__, path)
def _sync_common_repo(version):
abs_path = find_migrate_repo()
init_version = migrate_repo.DB_INIT_VERSION
engine = sql.get_engine()
_assert_not_schema_downgrade(version=version)
migration.db_sync(engine, abs_path, version=version,
init_version=init_version, sanity_check=False)
def _assert_not_schema_downgrade(extension=None, version=None):
if version is not None:
try:
current_ver = int(six.text_type(get_db_version(extension)))
if int(version) < current_ver:
raise migration.exception.DbMigrationError()
except exceptions.DatabaseNotControlledError:
# NOTE(morganfainberg): The database is not controlled, this action
# cannot be a downgrade.
pass
def _sync_extension_repo(extension, version):
init_version = 0
engine = sql.get_engine()
try:
package_name = '.'.join((contrib.__name__, extension))
package = importutils.import_module(package_name)
except ImportError:
raise ImportError(_("%s extension does not exist.")
% package_name)
try:
abs_path = find_migrate_repo(package)
try:
migration.db_version_control(sql.get_engine(), abs_path)
# Register the repo with the version control API
# If it already knows about the repo, it will throw
# an exception that we can safely ignore
except exceptions.DatabaseAlreadyControlledError:
pass
except exception.MigrationNotProvided as e:
print(e)
sys.exit(1)
_assert_not_schema_downgrade(extension=extension, version=version)
migration.db_sync(engine, abs_path, version=version,
init_version=init_version, sanity_check=False)
def sync_database_to_version(extension=None, version=None):
if not extension:
_sync_common_repo(version)
# If version is greater than 0, it is for the common
# repository only, and only that will be synchronized.
if version is None:
for default_extension in DEFAULT_EXTENSIONS:
_sync_extension_repo(default_extension, version)
else:
_sync_extension_repo(extension, version)
def get_db_version(extension=None):
if not extension:
return migration.db_version(sql.get_engine(), find_migrate_repo(),
migrate_repo.DB_INIT_VERSION)
try:
package_name = '.'.join((contrib.__name__, extension))
package = importutils.import_module(package_name)
except ImportError:
raise ImportError(_("%s extension does not exist.")
% package_name)
return migration.db_version(
sql.get_engine(), find_migrate_repo(package), 0)
def print_db_version(extension=None):
try:
db_version = get_db_version(extension=extension)
print(db_version)
except exception.MigrationNotProvided as e:
print(e)
sys.exit(1)
|
