# Copyright (c) 2014 Mirantis Inc. # # 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 traceback import uuid import eventlet.debug from oslo_config import cfg import oslo_messaging as messaging from oslo_messaging import target from oslo_serialization import jsonutils from murano.common import auth_utils from murano.common.helpers import token_sanitizer from murano.common import plugin_loader from murano.common import rpc from murano.dsl import dsl_exception from murano.dsl import executor from murano.dsl import serializer from murano.engine import client_manager from murano.engine import environment from murano.engine import package_class_loader from murano.engine import package_loader from murano.engine.system import status_reporter import murano.engine.system.system_objects as system_objects from murano.common.i18n import _LI, _LE from murano.openstack.common import log as logging from murano.policy import model_policy_enforcer as enforcer CONF = cfg.CONF RPC_SERVICE = None PLUGIN_LOADER = None LOG = logging.getLogger(__name__) eventlet.debug.hub_exceptions(False) class TaskProcessingEndpoint(object): @staticmethod def handle_task(context, task): s_task = token_sanitizer.TokenSanitizer().sanitize(task) LOG.info(_LI('Starting processing task: {task_desc}').format( task_desc=jsonutils.dumps(s_task))) result = {'model': task['model']} try: task_executor = TaskExecutor(task) result = task_executor.execute() except Exception as e: LOG.exception(_LE('Error during task execution for tenant %s'), task['tenant_id']) result['action'] = TaskExecutor.exception_result( e, traceback.format_exc()) msg_env = Environment(task['id']) reporter = status_reporter.StatusReporter() reporter.initialize(msg_env) reporter.report_error(msg_env, str(e)) finally: rpc.api().process_result(result, task['id']) def _prepare_rpc_service(server_id): endpoints = [TaskProcessingEndpoint()] transport = messaging.get_transport(CONF) s_target = target.Target('murano', 'tasks', server=server_id) return messaging.get_rpc_server(transport, s_target, endpoints, 'eventlet') def get_rpc_service(): global RPC_SERVICE if RPC_SERVICE is None: RPC_SERVICE = _prepare_rpc_service(str(uuid.uuid4())) return RPC_SERVICE def get_plugin_loader(): global PLUGIN_LOADER if PLUGIN_LOADER is None: PLUGIN_LOADER = plugin_loader.PluginLoader() return PLUGIN_LOADER class Environment(object): def __init__(self, object_id): self.object_id = object_id class TaskExecutor(object): @property def action(self): return self._action @property def environment(self): return self._environment @property def model(self): return self._model def __init__(self, task): self._action = task.get('action') self._model = task['model'] self._environment = environment.Environment() self._environment.token = task['token'] self._environment.tenant_id = task['tenant_id'] self._environment.system_attributes = self._model.get('SystemData', {}) self._environment.clients = client_manager.ClientManager() self._model_policy_enforcer = enforcer.ModelPolicyEnforcer( self._environment) def execute(self): self._create_trust() try: # !!! please do not delete 2 commented lines of code below. # Uncomment to make engine load packages from # local folder rather than from API !!! # pkg_loader = package_loader.DirectoryPackageLoader('./meta') # return self._execute(pkg_loader) murano_client_factory = lambda: \ self._environment.clients.get_murano_client(self._environment) with package_loader.ApiPackageLoader( murano_client_factory, self._environment.tenant_id) as pkg_loader: return self._execute(pkg_loader) finally: if self._model['Objects'] is None: self._delete_trust() def _execute(self, pkg_loader): class_loader = package_class_loader.PackageClassLoader(pkg_loader) system_objects.register(class_loader, pkg_loader) get_plugin_loader().register_in_loader(class_loader) exc = executor.MuranoDslExecutor(class_loader, self.environment) obj = exc.load(self.model) self._validate_model(obj, self.action, class_loader) action_result = None exception = None exception_traceback = None try: LOG.info(_LI('Invoking pre-cleanup hooks')) self.environment.start() exc.cleanup(self._model) except Exception as e: exception = e exception_traceback = TaskExecutor._log_exception(e, obj, '') finally: LOG.info(_LI('Invoking post-cleanup hooks')) self.environment.finish() if exception is None and self.action: try: LOG.info(_LI('Invoking pre-execution hooks')) self.environment.start() action_result = self._invoke(exc) except Exception as e: exception = e exception_traceback = TaskExecutor._log_exception( e, obj, self.action['method']) finally: LOG.info(_LI('Invoking post-execution hooks')) self.environment.finish() model = serializer.serialize_model(obj, exc) model['SystemData'] = self._environment.system_attributes result = { 'model': model, 'action': { 'result': None, 'isException': False } } if exception is not None: result['action'] = TaskExecutor.exception_result( exception, exception_traceback) else: result['action']['result'] = serializer.serialize_object( action_result) return result @staticmethod def _log_exception(e, root, method_name): if isinstance(e, dsl_exception.MuranoPlException): LOG.error('\n' + e.format(prefix=' ')) exception_traceback = e.format() else: exception_traceback = traceback.format_exc() LOG.exception( _LE("Exception %(exc)s occurred" " during invocation of %(method)s"), {'exc': e, 'method': method_name}) if root is not None: reporter = status_reporter.StatusReporter() reporter.initialize(root) reporter.report_error(root, str(e)) return exception_traceback @staticmethod def exception_result(exception, exception_traceback): return { 'isException': True, 'result': { 'message': str(exception), 'details': exception_traceback } } def _validate_model(self, obj, action, class_loader): if CONF.engine.enable_model_policy_enforcer: if obj is not None: if action is not None and action['method'] == 'deploy': self._model_policy_enforcer.validate(obj.to_dictionary(), class_loader) def _invoke(self, mpl_executor): obj = mpl_executor.object_store.get(self.action['object_id']) method_name, args = self.action['method'], self.action['args'] if obj is not None: return obj.type.invoke(method_name, mpl_executor, obj, args) def _create_trust(self): if not CONF.engine.use_trusts: return trust_id = self._environment.system_attributes.get('TrustId') if not trust_id: trust_id = auth_utils.create_trust(self._environment.token, self._environment.tenant_id) self._environment.system_attributes['TrustId'] = trust_id self._environment.trust_id = trust_id def _delete_trust(self): trust_id = self._environment.trust_id if trust_id: auth_utils.delete_trust(self._environment.trust_id) self._environment.system_attributes['TrustId'] = None self._environment.trust_id = None