111 lines
4.0 KiB
Python
111 lines
4.0 KiB
Python
# Copyright 2014 - Rackspace Hosting
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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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"""Common RPC service and API tools for Zun."""
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import oslo_messaging as messaging
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from oslo_messaging.rpc import dispatcher
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from oslo_service import service
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from oslo_utils import importutils
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from zun.common import context
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from zun.common import profiler
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from zun.common import rpc
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from zun.compute import manager as compute_manager
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import zun.conf
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from zun.objects import base as objects_base
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from zun.service import periodic
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from zun.servicegroup import zun_service_periodic as servicegroup
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osprofiler = importutils.try_import("osprofiler.profiler")
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CONF = zun.conf.CONF
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def _init_serializer():
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serializer = rpc.RequestContextSerializer(
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objects_base.ZunObjectSerializer())
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if osprofiler:
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serializer = rpc.ProfilerRequestContextSerializer(serializer)
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else:
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serializer = rpc.RequestContextSerializer(serializer)
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return serializer
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class Service(service.Service):
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def __init__(self, topic, server, endpoints, binary):
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super(Service, self).__init__()
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serializer = _init_serializer()
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transport = messaging.get_rpc_transport(CONF)
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access_policy = dispatcher.DefaultRPCAccessPolicy
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# TODO(asalkeld) add support for version='x.y'
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target = messaging.Target(topic=topic, server=server)
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self.endpoints = endpoints
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self._server = messaging.get_rpc_server(transport, target, endpoints,
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executor='eventlet',
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serializer=serializer,
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access_policy=access_policy)
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self.binary = binary
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profiler.setup(binary, CONF.host)
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def start(self):
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servicegroup.setup(CONF, self.binary, self.tg)
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periodic.setup(CONF, self.tg)
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for endpoint in self.endpoints:
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if isinstance(endpoint, compute_manager.Manager):
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endpoint.init_containers(
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context.get_admin_context(all_projects=True))
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self.tg.add_dynamic_timer(
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endpoint.run_periodic_tasks,
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periodic_interval_max=CONF.periodic_interval_max,
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context=context.get_admin_context(all_projects=True)
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)
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self._server.start()
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def stop(self):
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if self._server:
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self._server.stop()
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self._server.wait()
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super(Service, self).stop()
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@classmethod
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def create(cls, topic, server, handlers, binary):
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service_obj = cls(topic, server, handlers, binary)
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return service_obj
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class API(object):
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def __init__(self, context=None, topic=None, server=None,
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timeout=None):
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serializer = _init_serializer()
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self._context = context
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if topic is None:
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topic = ''
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target = messaging.Target(topic=topic, server=server)
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self._client = rpc.get_client(target,
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serializer=serializer,
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timeout=timeout)
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def _call(self, server, method, *args, **kwargs):
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cctxt = self._client.prepare(server=server)
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return cctxt.call(self._context, method, *args, **kwargs)
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def _cast(self, server, method, *args, **kwargs):
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cctxt = self._client.prepare(server=server)
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return cctxt.cast(self._context, method, *args, **kwargs)
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def echo(self, message):
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self._cast('echo', message=message)
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