# Copyright 2017 Catalyst IT Limited # # 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 abc import six from stevedore import driver from qinling import exceptions as exc ORCHESTRATOR = None @six.add_metaclass(abc.ABCMeta) class OrchestratorBase(object): """OrchestratorBase interface.""" @abc.abstractmethod def create_pool(self, name, image, **kwargs): raise NotImplementedError @abc.abstractmethod def delete_pool(self, name, **kwargs): raise NotImplementedError @abc.abstractmethod def prepare_execution(self, function_id, **kwargs): raise NotImplementedError @abc.abstractmethod def run_execution(self, function_id, **kwargs): raise NotImplementedError def load_orchestrator(conf): global ORCHESTRATOR if not ORCHESTRATOR: try: mgr = driver.DriverManager('qinling.orchestrator', conf.engine.orchestrator, invoke_on_load=True, invoke_args=[conf]) ORCHESTRATOR = mgr.driver except Exception as e: raise exc.OrchestratorException( 'Failed to load orchestrator: %s. Error: %s' % (conf.engine.orchestrator, str(e)) ) return ORCHESTRATOR