269 lines
8.9 KiB
Python
Executable File
269 lines
8.9 KiB
Python
Executable File
# Copyright (c) 2014 Mirantis Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain 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,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import copy
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import traceback
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import uuid
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import eventlet.debug
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from oslo_config import cfg
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from oslo_log import log as logging
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import oslo_messaging as messaging
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from oslo_messaging import target
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from oslo_serialization import jsonutils
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from murano.common import auth_utils
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from murano.common.helpers import token_sanitizer
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from murano.common import plugin_loader
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from murano.common import rpc
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from murano.dsl import context_manager
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from murano.dsl import dsl_exception
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from murano.dsl import executor as dsl_executor
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from murano.dsl import linked_context
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from murano.dsl import serializer
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from murano.engine import environment
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from murano.engine import package_loader
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from murano.engine.system import status_reporter
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from murano.engine.system import yaql_functions
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from murano.common.i18n import _LI, _LE, _LW
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from murano.policy import model_policy_enforcer as enforcer
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CONF = cfg.CONF
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RPC_SERVICE = None
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PLUGIN_LOADER = None
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LOG = logging.getLogger(__name__)
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eventlet.debug.hub_exceptions(False)
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def _prepare_rpc_service(server_id):
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endpoints = [TaskProcessingEndpoint()]
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transport = messaging.get_transport(CONF)
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s_target = target.Target('murano', 'tasks', server=server_id)
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return messaging.get_rpc_server(transport, s_target, endpoints, 'eventlet')
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def get_rpc_service():
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global RPC_SERVICE
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if RPC_SERVICE is None:
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RPC_SERVICE = _prepare_rpc_service(str(uuid.uuid4()))
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return RPC_SERVICE
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def get_plugin_loader():
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global PLUGIN_LOADER
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if PLUGIN_LOADER is None:
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PLUGIN_LOADER = plugin_loader.PluginLoader()
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return PLUGIN_LOADER
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class ContextManager(context_manager.ContextManager):
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def create_root_context(self, runtime_version):
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root_context = super(ContextManager, self).create_root_context(
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runtime_version)
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return linked_context.link(
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root_context, yaql_functions.get_context(runtime_version))
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class TaskProcessingEndpoint(object):
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@classmethod
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def handle_task(cls, context, task):
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result = cls.execute(task)
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rpc.api().process_result(result, task['id'])
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@staticmethod
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def execute(task):
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s_task = token_sanitizer.TokenSanitizer().sanitize(task)
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LOG.info(_LI('Starting processing task: {task_desc}').format(
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task_desc=jsonutils.dumps(s_task)))
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result = None
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reporter = status_reporter.StatusReporter(task['id'])
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try:
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task_executor = TaskExecutor(task, reporter)
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result = task_executor.execute()
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return result
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finally:
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LOG.info(_LI('Finished processing task: {task_desc}').format(
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task_desc=jsonutils.dumps(result)))
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class TaskExecutor(object):
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@property
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def action(self):
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return self._action
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@property
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def environment(self):
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return self._environment
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@property
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def model(self):
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return self._model
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def __init__(self, task, reporter=None):
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if reporter is None:
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reporter = status_reporter.StatusReporter(task['id'])
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self._action = task.get('action')
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self._model = task['model']
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self._environment = environment.Environment()
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self._environment.token = task['token']
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self._environment.tenant_id = task['tenant_id']
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self._environment.system_attributes = self._model.get('SystemData', {})
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self._reporter = reporter
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self._model_policy_enforcer = enforcer.ModelPolicyEnforcer(
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self._environment)
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def execute(self):
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try:
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self._create_trust()
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except Exception as e:
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return self.exception_result(e, None, '<system>')
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murano_client_factory = \
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lambda: self._environment.clients.get_murano_client()
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with package_loader.CombinedPackageLoader(
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murano_client_factory,
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self._environment.tenant_id) as pkg_loader:
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result = self._execute(pkg_loader)
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self._model['SystemData'] = self._environment.system_attributes
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result['model'] = self._model
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if (not self._model.get('Objects')
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and not self._model.get('ObjectsCopy')):
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try:
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self._delete_trust()
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except Exception:
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LOG.warning(_LW('Cannot delete trust'), exc_info=True)
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return result
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def _execute(self, pkg_loader):
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get_plugin_loader().register_in_loader(pkg_loader)
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executor = dsl_executor.MuranoDslExecutor(
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pkg_loader, ContextManager(), self.environment)
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try:
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obj = executor.load(self.model)
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except Exception as e:
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return self.exception_result(e, None, '<load>')
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if obj is not None:
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try:
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self._validate_model(obj.object, pkg_loader)
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except Exception as e:
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return self.exception_result(e, obj, '<validate>')
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try:
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LOG.debug('Invoking pre-cleanup hooks')
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self.environment.start()
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executor.cleanup(self._model)
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except Exception as e:
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return self.exception_result(e, obj, '<GC>')
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finally:
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LOG.debug('Invoking post-cleanup hooks')
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self.environment.finish()
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self._model['ObjectsCopy'] = copy.deepcopy(self._model.get('Objects'))
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action_result = None
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if self.action:
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try:
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LOG.debug('Invoking pre-execution hooks')
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self.environment.start()
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try:
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action_result = self._invoke(executor)
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finally:
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try:
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self._model = serializer.serialize_model(obj, executor)
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except Exception as e:
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return self.exception_result(e, None, '<model>')
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except Exception as e:
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return self.exception_result(e, obj, self.action['method'])
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finally:
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LOG.debug('Invoking post-execution hooks')
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self.environment.finish()
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try:
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action_result = serializer.serialize(action_result)
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except Exception as e:
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return self.exception_result(e, None, '<result>')
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return {
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'action': {
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'result': action_result,
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'isException': False
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}
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}
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def exception_result(self, exception, root, method_name):
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if isinstance(exception, dsl_exception.MuranoPlException):
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LOG.error('\n' + exception.format(prefix=' '))
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exception_traceback = exception.format()
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else:
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exception_traceback = traceback.format_exc()
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LOG.exception(
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_LE("Exception %(exc)s occurred"
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" during invocation of %(method)s"),
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{'exc': exception, 'method': method_name})
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self._reporter.report_error(root, str(exception))
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return {
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'action': {
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'isException': True,
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'result': {
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'message': str(exception),
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'details': exception_traceback
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}
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}
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}
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def _validate_model(self, obj, pkg_loader):
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if CONF.engine.enable_model_policy_enforcer:
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if obj is not None:
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self._model_policy_enforcer.modify(obj, pkg_loader)
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self._model_policy_enforcer.validate(obj.to_dictionary(),
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pkg_loader)
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def _invoke(self, mpl_executor):
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obj = mpl_executor.object_store.get(self.action['object_id'])
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method_name, kwargs = self.action['method'], self.action['args']
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if obj is not None:
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return obj.type.invoke(method_name, mpl_executor, obj, (), kwargs)
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def _create_trust(self):
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if not CONF.engine.use_trusts:
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return
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trust_id = self._environment.system_attributes.get('TrustId')
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if not trust_id:
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trust_id = auth_utils.create_trust(self._environment.token,
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self._environment.tenant_id)
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self._environment.system_attributes['TrustId'] = trust_id
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self._environment.trust_id = trust_id
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def _delete_trust(self):
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trust_id = self._environment.trust_id
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if trust_id:
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auth_utils.delete_trust(self._environment.trust_id)
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self._environment.system_attributes['TrustId'] = None
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self._environment.trust_id = None
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