130 lines
4.2 KiB
Python
130 lines
4.2 KiB
Python
# Copyright 2016 - Nokia Networks
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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 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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from oslo_log import log as logging
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from mistral import config as cfg
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from mistral.executors import default_executor as exe
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from mistral.rpc import base as rpc
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from mistral.service import base as service_base
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from mistral.services import action_execution_reporter
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from mistral.utils import profiler as profiler_utils
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from mistral_lib import utils
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CONF = cfg.CONF
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LOG = logging.getLogger(__name__)
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class ExecutorServer(service_base.MistralService):
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"""Executor server.
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This class manages executor life-cycle and gets registered as an RPC
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endpoint to process executor specific calls. It also registers a
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cluster member associated with this instance of executor.
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"""
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def __init__(self, executor, setup_profiler=True):
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super(ExecutorServer, self).__init__('executor_group', setup_profiler)
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self.executor = executor
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self._rpc_server = None
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def start(self):
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super(ExecutorServer, self).start()
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action_execution_reporter.start()
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if self._setup_profiler:
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profiler_utils.setup('mistral-executor', cfg.CONF.executor.host)
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# Initialize and start RPC server.
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self._rpc_server = rpc.get_rpc_server_driver()(cfg.CONF.executor)
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self._rpc_server.register_endpoint(self)
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self._rpc_server.run(executor='threading')
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self._notify_started('Executor server started.')
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def stop(self, graceful=False):
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super(ExecutorServer, self).stop(graceful)
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action_execution_reporter.stop()
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if self._rpc_server:
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self._rpc_server.stop(graceful)
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def run_action(self, rpc_ctx, action_ex_id, action_cls_str,
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action_cls_attrs, params, safe_rerun, execution_context,
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timeout):
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"""Receives calls over RPC to run action on executor.
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:param timeout: a period of time in seconds after which execution of
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action will be interrupted
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:param execution_context: A dict of values providing information about
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the current execution.
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:param rpc_ctx: RPC request context dictionary.
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:param action_ex_id: Action execution id.
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:param action_cls_str: Action class name.
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:param action_cls_attrs: Action class attributes.
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:param params: Action input parameters.
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:param safe_rerun: Tells if given action can be safely rerun.
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:return: Action result.
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"""
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LOG.debug(
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"Received RPC request 'run_action'[action_ex_id=%s, "
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"action_cls_str=%s, action_cls_attrs=%s, params=%s, "
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"timeout=%s]",
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action_ex_id,
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action_cls_str,
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action_cls_attrs,
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utils.cut(params),
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timeout
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)
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redelivered = rpc_ctx.redelivered or False
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try:
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action_execution_reporter.add_action_ex_id(action_ex_id)
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res = self.executor.run_action(
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action_ex_id,
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action_cls_str,
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action_cls_attrs,
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params,
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safe_rerun,
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execution_context,
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redelivered,
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timeout=timeout
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)
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LOG.debug(
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"Sending action result to engine"
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" [action_ex_id=%s, action_cls=%s]",
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action_ex_id,
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action_cls_str
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)
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return res
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finally:
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action_execution_reporter.remove_action_ex_id(action_ex_id)
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def get_oslo_service(setup_profiler=True):
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return ExecutorServer(
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exe.DefaultExecutor(),
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setup_profiler=setup_profiler
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)
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