068831ccd8
With this change MuranoPackage becomes first-class DSL citizen. Packages have version, runtime_version (that is specified in Format attribute of the manifest file) and a list of classes. Previously engine used to have package loader which had most of "load" functionality and class loader that mostly acted as an adapter from package loader to interface that DSL used to get classes. Now class loader is gone and is replaced with package loader at the DSL level. Package loader is responsible for loading packages by either package or class name (as it was before) plus semantic_version spec (for example ">=1.2,<2.0"). Package loader can now keep track of several versions of the same package. Also packages now have requirements with version specs. All class names that are encountered in application code are looked up within requirements only. As a consequence packages that use other packages without referencing them explicitly will become broken. An exception from this rule is core library which is referenced automatically. Partially implements: blueprint murano-versioning Change-Id: I8789ba45b6210e71bf4977a766f82b66d2a2d270
120 lines
4.0 KiB
Python
120 lines
4.0 KiB
Python
# Copyright (c) 2014 OpenStack Foundation.
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import re
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from oslo_log import log as logging
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from murano.common.i18n import _, _LI
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from murano.policy import congress_rules
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LOG = logging.getLogger(__name__)
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class ValidationError(Exception):
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"""Raised for validation errors."""
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pass
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class ModelPolicyEnforcer(object):
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"""Policy Enforcer Implementation using Congress client
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Converts murano model to list of congress data rules.
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We ask congress using simulation api of congress rest client
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to resolve "murano_system:predeploy_errors(env_id, obj_id, msg)"
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table along with congress data rules to return validation results.
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"""
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def __init__(self, environment):
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self._environment = environment
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self._client_manager = environment.clients
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def validate(self, model, package_loader=None):
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"""Validate model using Congress rule engine.
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@type model: dict
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@param model: Dictionary representation of model starting on
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environment level (['Objects'])
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@type package_loader: murano.dsl.package_loader.MuranoPackageLoader
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@param package_loader: Optional. Used for evaluating parent class types
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@raises ValidationError in case validation was not successful
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"""
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if model is None:
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return
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client = self._client_manager.get_congress_client(self._environment)
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if not client:
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raise ValueError(_('Congress client is not configured!'))
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LOG.info(_LI('Validating model'))
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LOG.debug(model)
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rules = congress_rules.CongressRulesManager().convert(
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model, package_loader, self._environment.tenant_id)
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rules_str = map(str, rules)
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env_id = model['?']['id']
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# cleanup of data populated by murano driver
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rules_str.insert(0, 'deleteEnv("{0}")'.format(env_id))
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rules_line = " ".join(rules_str)
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LOG.debug('Congress rules: \n ' +
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'\n '.join(rules_str))
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validation_result = client.execute_policy_action(
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"murano_system",
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"simulate",
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False,
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False,
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{'query': 'predeploy_errors(eid, oid, msg)',
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'action_policy': 'murano_action',
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'sequence': rules_line})
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if validation_result["result"]:
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messages = self._parse_messages(env_id,
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validation_result["result"])
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if messages:
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result_str = "\n ".join(map(str, messages))
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msg = _("Murano object model validation failed: {0}").format(
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"\n " + result_str)
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LOG.error(msg)
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raise ValidationError(msg)
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else:
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LOG.info(_LI('Model valid'))
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def _parse_messages(self, env_id, results):
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"""Transforms list of strings in format
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['predeploy_errors("env_id_1", "obj_id_1", "message1")',
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'predeploy_errors("env_id_2", "obj_id_2", "message2")']
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to list of strings with message only filtered to provided
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env_id (e.g. 'env_id_1'):
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['message2']
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"""
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messages = []
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regexp = 'predeploy_errors\("([^"]*)",\s*"([^"]*)",\s*"([^"]*)"\)'
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for result in results:
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match = re.search(regexp, result)
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if match:
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if env_id in match.group(1):
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messages.append(match.group(3))
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return messages
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