murano/murano/common/engine.py

139 lines
4.6 KiB
Python

# 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 uuid
import anyjson
import eventlet.debug
from oslo import messaging
from oslo.messaging import target
from murano.common import config
from murano.common.helpers import token_sanitizer
from murano.common import rpc
from murano.dsl import dsl_exception
from murano.dsl import executor
from murano.dsl import results_serializer
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.openstack.common.gettextutils import _
from murano.openstack.common import log as logging
RPC_SERVICE = 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(_('Starting processing task: {task_desc}').format(
task_desc=anyjson.dumps(s_task)))
result = task['model']
try:
task_executor = TaskExecutor(task)
result = task_executor.execute()
except Exception as e:
LOG.exception('Error during task execution for tenant %s',
task['tenant_id'])
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(config.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
class Environment:
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']
def execute(self):
token, tenant_id = self.environment.token, self.environment.tenant_id
with package_loader.ApiPackageLoader(token, tenant_id) as pkg_loader:
class_loader = package_class_loader.PackageClassLoader(pkg_loader)
system_objects.register(class_loader, pkg_loader)
exc = executor.MuranoDslExecutor(class_loader, self.environment)
obj = exc.load(self.model)
try:
# Skip execution of action in case of no action is provided.
# Model will be just loaded, cleaned-up and unloaded.
# Most of the time this is used for deletion of environments.
if self.action:
self._invoke(exc)
except Exception as e:
if isinstance(e, dsl_exception.MuranoPlException):
LOG.error('\n' + e.format(prefix=' '))
else:
LOG.exception(e)
reporter = status_reporter.StatusReporter()
reporter.initialize(obj)
reporter.report_error(obj, str(e))
return results_serializer.serialize(obj, exc)
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:
obj.type.invoke(method_name, mpl_executor, obj, args)