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
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
|
#
# 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 collections
from oslo_serialization import jsonutils
import six
from heat.common import exception
from heat.common.i18n import _
from heat.engine import constraints as constr
from heat.engine import function
from heat.engine.hot import parameters as hot_param
from heat.engine import parameters
from heat.engine import support
SCHEMA_KEYS = (
REQUIRED, IMPLEMENTED, DEFAULT, TYPE, SCHEMA,
ALLOWED_PATTERN, MIN_VALUE, MAX_VALUE, ALLOWED_VALUES,
MIN_LENGTH, MAX_LENGTH, DESCRIPTION, UPDATE_ALLOWED,
IMMUTABLE,
) = (
'Required', 'Implemented', 'Default', 'Type', 'Schema',
'AllowedPattern', 'MinValue', 'MaxValue', 'AllowedValues',
'MinLength', 'MaxLength', 'Description', 'UpdateAllowed',
'Immutable',
)
class Schema(constr.Schema):
"""
Schema class for validating resource properties.
This class is used for defining schema constraints for resource properties.
It inherits generic validation features from the base Schema class and add
processing that is specific to resource properties.
"""
KEYS = (
TYPE, DESCRIPTION, DEFAULT, SCHEMA, REQUIRED, CONSTRAINTS,
UPDATE_ALLOWED, IMMUTABLE,
) = (
'type', 'description', 'default', 'schema', 'required', 'constraints',
'update_allowed', 'immutable',
)
def __init__(self, data_type, description=None,
default=None, schema=None,
required=False, constraints=None,
implemented=True,
update_allowed=False,
immutable=False,
support_status=support.SupportStatus(),
allow_conversion=False):
super(Schema, self).__init__(data_type, description, default,
schema, required, constraints)
self.implemented = implemented
self.update_allowed = update_allowed
self.immutable = immutable
self.support_status = support_status
self.allow_conversion = allow_conversion
# validate structural correctness of schema itself
self.validate()
@classmethod
def from_legacy(cls, schema_dict):
"""
Return a Property Schema object from a legacy schema dictionary.
"""
# Check for fully-fledged Schema objects
if isinstance(schema_dict, cls):
return schema_dict
unknown = [k for k in schema_dict if k not in SCHEMA_KEYS]
if unknown:
raise exception.InvalidSchemaError(
message=_('Unknown key(s) %s') % unknown)
def constraints():
def get_num(key):
val = schema_dict.get(key)
if val is not None:
val = Schema.str_to_num(val)
return val
if MIN_VALUE in schema_dict or MAX_VALUE in schema_dict:
yield constr.Range(get_num(MIN_VALUE), get_num(MAX_VALUE))
if MIN_LENGTH in schema_dict or MAX_LENGTH in schema_dict:
yield constr.Length(get_num(MIN_LENGTH), get_num(MAX_LENGTH))
if ALLOWED_VALUES in schema_dict:
yield constr.AllowedValues(schema_dict[ALLOWED_VALUES])
if ALLOWED_PATTERN in schema_dict:
yield constr.AllowedPattern(schema_dict[ALLOWED_PATTERN])
try:
data_type = schema_dict[TYPE]
except KeyError:
raise exception.InvalidSchemaError(
message=_('No %s specified') % TYPE)
if SCHEMA in schema_dict:
if data_type == Schema.LIST:
ss = cls.from_legacy(schema_dict[SCHEMA])
elif data_type == Schema.MAP:
schema_dicts = schema_dict[SCHEMA].items()
ss = dict((n, cls.from_legacy(sd)) for n, sd in schema_dicts)
else:
raise exception.InvalidSchemaError(
message=_('%(schema)s supplied for %(type)s %(data)s') %
dict(schema=SCHEMA, type=TYPE, data=data_type))
else:
ss = None
return cls(data_type,
description=schema_dict.get(DESCRIPTION),
default=schema_dict.get(DEFAULT),
schema=ss,
required=schema_dict.get(REQUIRED, False),
constraints=list(constraints()),
implemented=schema_dict.get(IMPLEMENTED, True),
update_allowed=schema_dict.get(UPDATE_ALLOWED, False),
immutable=schema_dict.get(IMMUTABLE, False))
@classmethod
def from_parameter(cls, param):
"""
Return a Property Schema corresponding to a Parameter Schema.
Convert a parameter schema from a provider template to a property
Schema for the corresponding resource facade.
"""
# map param types to property types
param_type_map = {
param.STRING: cls.STRING,
param.NUMBER: cls.NUMBER,
param.LIST: cls.LIST,
param.MAP: cls.MAP,
param.BOOLEAN: cls.BOOLEAN
}
# allow_conversion allows slightly more flexible type conversion
# where property->parameter types don't align, primarily when
# a json parameter value is passed via a Map property, which requires
# some coercion to pass strings or lists (which are both valid for
# Json parameters but not for Map properties).
allow_conversion = param.type == param.MAP
# make update_allowed true by default on TemplateResources
# as the template should deal with this.
return cls(data_type=param_type_map.get(param.type, cls.MAP),
description=param.description,
required=param.required,
constraints=param.constraints,
update_allowed=True,
immutable=False,
allow_conversion=allow_conversion)
def allowed_param_prop_type(self):
"""
Return allowed type of Property Schema converted from parameter.
Especially, when generating Schema from parameter, Integer Property
Schema will be supplied by Number parameter.
"""
param_type_map = {
self.INTEGER: self.NUMBER,
self.STRING: self.STRING,
self.NUMBER: self.NUMBER,
self.BOOLEAN: self.BOOLEAN,
self.LIST: self.LIST,
self.MAP: self.MAP
}
return param_type_map[self.type]
def __getitem__(self, key):
if key == self.UPDATE_ALLOWED:
return self.update_allowed
elif key == self.IMMUTABLE:
return self.immutable
else:
return super(Schema, self).__getitem__(key)
raise KeyError(key)
def schemata(schema_dicts):
"""
Return dictionary of Schema objects for given dictionary of schemata.
The input schemata are converted from the legacy (dictionary-based)
format to Schema objects where necessary.
"""
return dict((n, Schema.from_legacy(s)) for n, s in schema_dicts.items())
class Property(object):
def __init__(self, schema, name=None, context=None):
self.schema = Schema.from_legacy(schema)
self.name = name
self.context = context
def required(self):
return self.schema.required
def implemented(self):
return self.schema.implemented
def update_allowed(self):
return self.schema.update_allowed
def immutable(self):
return self.schema.immutable
def has_default(self):
return self.schema.default is not None
def default(self):
return self.schema.default
def type(self):
return self.schema.type
def support_status(self):
return self.schema.support_status
def _get_integer(self, value):
if value is None:
value = self.has_default() and self.default() or 0
try:
value = int(value)
except ValueError:
raise TypeError(_("Value '%s' is not an integer") % value)
else:
return value
def _get_number(self, value):
if value is None:
value = self.has_default() and self.default() or 0
return Schema.str_to_num(value)
def _get_string(self, value):
if value is None:
value = self.has_default() and self.default() or ''
if not isinstance(value, six.string_types):
if isinstance(value, (bool, int)):
value = six.text_type(value)
else:
raise ValueError(_('Value must be a string'))
return value
def _get_children(self, child_values, keys=None, validate=False):
if self.schema.schema is not None:
if keys is None:
keys = list(self.schema.schema)
schemata = dict((k, self.schema.schema[k]) for k in keys)
properties = Properties(schemata, dict(child_values),
context=self.context)
if validate:
properties.validate()
return ((k, properties[k]) for k in keys)
else:
return child_values
def _get_map(self, value, validate=False):
if value is None:
value = self.has_default() and self.default() or {}
if not isinstance(value, collections.Mapping):
# This is to handle passing Lists via Json parameters exposed
# via a provider resource, in particular lists-of-dicts which
# cannot be handled correctly via comma_delimited_list
if self.schema.allow_conversion:
if isinstance(value, six.string_types):
return value
elif isinstance(value, collections.Sequence):
return jsonutils.dumps(value)
raise TypeError(_('"%s" is not a map') % value)
return dict(self._get_children(six.iteritems(value),
validate=validate))
def _get_list(self, value, validate=False):
if value is None:
value = self.has_default() and self.default() or []
if (not isinstance(value, collections.Sequence) or
isinstance(value, six.string_types)):
raise TypeError(_('"%s" is not a list') % repr(value))
return [v[1] for v in self._get_children(enumerate(value),
range(len(value)),
validate)]
def _get_bool(self, value):
if value is None:
value = self.has_default() and self.default() or False
if isinstance(value, bool):
return value
normalised = value.lower()
if normalised not in ['true', 'false']:
raise ValueError(_('"%s" is not a valid boolean') % normalised)
return normalised == 'true'
def get_value(self, value, validate=False):
"""Get value from raw value and sanitize according to data type."""
t = self.type()
if t == Schema.STRING:
_value = self._get_string(value)
elif t == Schema.INTEGER:
_value = self._get_integer(value)
elif t == Schema.NUMBER:
_value = self._get_number(value)
elif t == Schema.MAP:
_value = self._get_map(value, validate)
elif t == Schema.LIST:
_value = self._get_list(value, validate)
elif t == Schema.BOOLEAN:
_value = self._get_bool(value)
if validate:
self.schema.validate_constraints(_value, self.context)
return _value
class Properties(collections.Mapping):
def __init__(self, schema, data, resolver=lambda d: d, parent_name=None,
context=None, section=None):
self.props = dict((k, Property(s, k, context))
for k, s in schema.items())
self.resolve = resolver
self.data = data
self.error_prefix = []
if parent_name is not None:
self.error_prefix.append(parent_name)
if section is not None:
self.error_prefix.append(section)
self.context = context
@staticmethod
def schema_from_params(params_snippet):
"""
Convert a template snippet that defines parameters
into a properties schema
:param params_snippet: parameter definition from a template
:returns: an equivalent properties schema for the specified params
"""
if params_snippet:
return dict((n, Schema.from_parameter(p)) for n, p
in params_snippet.items())
return {}
def validate(self, with_value=True):
try:
for key in self.data:
if key not in self.props:
msg = _("Unknown Property %s") % key
raise exception.StackValidationFailed(message=msg)
for (key, prop) in self.props.items():
# check that update_allowed and immutable
# do not contradict each other
if prop.update_allowed() and prop.immutable():
msg = _("Property %(prop)s: %(ua)s and %(im)s "
"cannot both be True") % {
'prop': key,
'ua': prop.schema.UPDATE_ALLOWED,
'im': prop.schema.IMMUTABLE}
raise exception.InvalidSchemaError(message=msg)
if with_value:
try:
self._get_property_value(key, validate=True)
except exception.StackValidationFailed as ex:
path = [key]
path.extend(ex.path)
raise exception.StackValidationFailed(
path=path, message=ex.error_message)
except ValueError as e:
if prop.required() and key not in self.data:
path = []
else:
path = [key]
raise exception.StackValidationFailed(
path=path, message=six.text_type(e))
# are there unimplemented Properties
if not prop.implemented() and key in self.data:
msg = _("Property %s not implemented yet") % key
raise exception.StackValidationFailed(message=msg)
except exception.StackValidationFailed as ex:
# NOTE(prazumovsky): should reraise exception for adding specific
# error name and error_prefix to path for correct error message
# building.
path = self.error_prefix
path.extend(ex.path)
raise exception.StackValidationFailed(
error=ex.error or 'Property error',
path=path,
message=ex.error_message
)
def _find_deps_any_in_init(self, unresolved_value):
deps = function.dependencies(unresolved_value)
if any(res.action == res.INIT for res in deps):
return True
def _get_property_value(self, key, validate=False):
if key not in self:
raise KeyError(_('Invalid Property %s') % key)
prop = self.props[key]
if key in self.data:
try:
unresolved_value = self.data[key]
if validate:
if self._find_deps_any_in_init(unresolved_value):
validate = False
value = self.resolve(unresolved_value)
return prop.get_value(value, validate)
# Children can raise StackValidationFailed with unique path which
# is necessary for further use in StackValidationFailed exception.
# So we need to handle this exception in this method.
except exception.StackValidationFailed as e:
raise exception.StackValidationFailed(path=e.path,
message=e.error_message)
# the resolver function could raise any number of exceptions,
# so handle this generically
except Exception as e:
raise ValueError(six.text_type(e))
elif prop.has_default():
return prop.get_value(None, validate)
elif prop.required():
raise ValueError(_('Property %s not assigned') % key)
def __getitem__(self, key):
return self._get_property_value(key)
def __len__(self):
return len(self.props)
def __contains__(self, key):
return key in self.props
def __iter__(self):
return iter(self.props)
@staticmethod
def _param_def_from_prop(schema):
"""
Return a template parameter definition corresponding to a property.
"""
param_type_map = {
schema.INTEGER: parameters.Schema.NUMBER,
schema.STRING: parameters.Schema.STRING,
schema.NUMBER: parameters.Schema.NUMBER,
schema.BOOLEAN: parameters.Schema.BOOLEAN,
schema.MAP: parameters.Schema.MAP,
schema.LIST: parameters.Schema.LIST,
}
def param_items():
yield parameters.TYPE, param_type_map[schema.type]
if schema.description is not None:
yield parameters.DESCRIPTION, schema.description
if schema.default is not None:
yield parameters.DEFAULT, schema.default
for constraint in schema.constraints:
if isinstance(constraint, constr.Length):
if constraint.min is not None:
yield parameters.MIN_LENGTH, constraint.min
if constraint.max is not None:
yield parameters.MAX_LENGTH, constraint.max
elif isinstance(constraint, constr.Range):
if constraint.min is not None:
yield parameters.MIN_VALUE, constraint.min
if constraint.max is not None:
yield parameters.MAX_VALUE, constraint.max
elif isinstance(constraint, constr.AllowedValues):
yield parameters.ALLOWED_VALUES, list(constraint.allowed)
elif isinstance(constraint, constr.AllowedPattern):
yield parameters.ALLOWED_PATTERN, constraint.pattern
if schema.type == schema.BOOLEAN:
yield parameters.ALLOWED_VALUES, ['True', 'true',
'False', 'false']
return dict(param_items())
@staticmethod
def _prop_def_from_prop(name, schema):
"""
Return a provider template property definition for a property.
"""
if schema.type == Schema.LIST:
return {'Fn::Split': [',', {'Ref': name}]}
else:
return {'Ref': name}
@staticmethod
def _hot_param_def_from_prop(schema):
"""
Return parameter definition corresponding to a property for
hot template.
"""
param_type_map = {
schema.INTEGER: hot_param.HOTParamSchema.NUMBER,
schema.STRING: hot_param.HOTParamSchema.STRING,
schema.NUMBER: hot_param.HOTParamSchema.NUMBER,
schema.BOOLEAN: hot_param.HOTParamSchema.BOOLEAN,
schema.MAP: hot_param.HOTParamSchema.MAP,
schema.LIST: hot_param.HOTParamSchema.LIST,
}
def param_items():
yield hot_param.HOTParamSchema.TYPE, param_type_map[schema.type]
if schema.description is not None:
yield hot_param.HOTParamSchema.DESCRIPTION, schema.description
if schema.default is not None:
yield hot_param.HOTParamSchema.DEFAULT, schema.default
for constraint in schema.constraints:
if (isinstance(constraint, constr.Length) or
isinstance(constraint, constr.Range)):
if constraint.min is not None:
yield hot_param.MIN, constraint.min
if constraint.max is not None:
yield hot_param.MAX, constraint.max
elif isinstance(constraint, constr.AllowedValues):
yield hot_param.ALLOWED_VALUES, list(constraint.allowed)
elif isinstance(constraint, constr.AllowedPattern):
yield hot_param.ALLOWED_PATTERN, constraint.pattern
if schema.type == schema.BOOLEAN:
yield hot_param.ALLOWED_VALUES, ['True', 'true',
'False', 'false']
return dict(param_items())
@staticmethod
def _hot_prop_def_from_prop(name, schema):
"""
Return a provider template property definition for a property.
"""
return {'get_param': name}
@classmethod
def schema_to_parameters_and_properties(cls, schema, template_type='cfn'):
"""Generates properties with params resolved for a resource's
properties_schema.
:param schema: A resource type's properties_schema
:returns: A tuple of params and properties dicts
ex: input: {'foo': {'Type': 'List'}}
output: {'foo': {'Type': 'CommaDelimitedList'}},
{'foo': {'Fn::Split': {'Ref': 'foo'}}}
ex: input: {'foo': {'Type': 'String'}, 'bar': {'Type': 'Map'}}
output: {'foo': {'Type': 'String'}, 'bar': {'Type': 'Json'}},
{'foo': {'Ref': 'foo'}, 'bar': {'Ref': 'bar'}}
"""
def param_prop_def_items(name, schema, template_type):
if template_type == 'hot':
param_def = cls._hot_param_def_from_prop(schema)
prop_def = cls._hot_prop_def_from_prop(name, schema)
else:
param_def = cls._param_def_from_prop(schema)
prop_def = cls._prop_def_from_prop(name, schema)
return (name, param_def), (name, prop_def)
if not schema:
return {}, {}
param_prop_defs = [param_prop_def_items(n, s, template_type)
for n, s in six.iteritems(schemata(schema))
if s.implemented]
param_items, prop_items = zip(*param_prop_defs)
return dict(param_items), dict(prop_items)
|