5cbe39aca9
At the service startup nova need to initialize either the eventlet or the threading backend of oslo.service. So this patch reuses the existing logic behind OS_NOVA_DISABLE_EVENTLET_PATCHING. When OS_NOVA_DISABLE_EVENTLET_PATCHING env variable is set to true the service will select the threading backend otherwise the eventlet backend. Also to avoid later monkey patch calls to invalidated the selection if the threading backend is selected then the monkey_patch code is poisoned. This patch also makes sure that oslo.messaging also initialized with the matching executor backend. As this is the last step to make nova-scheduler run in threading mode this patch adds a release notes as well. Change-Id: I6e2e6a43df78d23580b5e7402352a5036100ab36 Signed-off-by: Balazs Gibizer <gibi@redhat.com>
445 lines
16 KiB
Python
445 lines
16 KiB
Python
# Copyright 2013 Red Hat, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# 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, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import functools
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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.rpc import dispatcher
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from oslo_serialization import jsonutils
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from oslo_service import periodic_task
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from oslo_utils import importutils
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import nova.conf
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import nova.context
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import nova.exception
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from nova.i18n import _
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from nova import utils
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__all__ = [
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'init',
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'cleanup',
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'set_defaults',
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'add_extra_exmods',
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'clear_extra_exmods',
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'get_allowed_exmods',
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'RequestContextSerializer',
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'get_client',
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'get_server',
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'get_notifier',
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]
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profiler = importutils.try_import("osprofiler.profiler")
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CONF = nova.conf.CONF
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LOG = logging.getLogger(__name__)
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# TODO(stephenfin): These should be private
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TRANSPORT = None
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LEGACY_NOTIFIER = None
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NOTIFICATION_TRANSPORT = None
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NOTIFIER = None
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# NOTE(danms): If rpc_response_timeout is over this value (per-call or
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# globally), we will enable heartbeating
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HEARTBEAT_THRESHOLD = 60
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ALLOWED_EXMODS = [
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nova.exception.__name__,
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]
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EXTRA_EXMODS = []
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def init(conf):
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global TRANSPORT, NOTIFICATION_TRANSPORT, LEGACY_NOTIFIER, NOTIFIER
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exmods = get_allowed_exmods()
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TRANSPORT = create_transport(get_transport_url())
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NOTIFICATION_TRANSPORT = messaging.get_notification_transport(
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conf, allowed_remote_exmods=exmods)
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serializer = RequestContextSerializer(JsonPayloadSerializer())
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if conf.notifications.notification_format == 'unversioned':
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LEGACY_NOTIFIER = messaging.Notifier(NOTIFICATION_TRANSPORT,
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serializer=serializer)
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NOTIFIER = messaging.Notifier(NOTIFICATION_TRANSPORT,
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serializer=serializer, driver='noop')
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elif conf.notifications.notification_format == 'both':
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LEGACY_NOTIFIER = messaging.Notifier(NOTIFICATION_TRANSPORT,
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serializer=serializer)
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NOTIFIER = messaging.Notifier(
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NOTIFICATION_TRANSPORT,
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serializer=serializer,
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topics=conf.notifications.versioned_notifications_topics)
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else:
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LEGACY_NOTIFIER = messaging.Notifier(NOTIFICATION_TRANSPORT,
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serializer=serializer,
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driver='noop')
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NOTIFIER = messaging.Notifier(
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NOTIFICATION_TRANSPORT,
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serializer=serializer,
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topics=conf.notifications.versioned_notifications_topics)
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def cleanup():
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global TRANSPORT, NOTIFICATION_TRANSPORT, LEGACY_NOTIFIER, NOTIFIER
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assert TRANSPORT is not None
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assert NOTIFICATION_TRANSPORT is not None
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assert LEGACY_NOTIFIER is not None
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assert NOTIFIER is not None
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TRANSPORT.cleanup()
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NOTIFICATION_TRANSPORT.cleanup()
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TRANSPORT = NOTIFICATION_TRANSPORT = LEGACY_NOTIFIER = NOTIFIER = None
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def set_defaults(control_exchange):
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messaging.set_transport_defaults(control_exchange)
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def add_extra_exmods(*args):
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EXTRA_EXMODS.extend(args)
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def clear_extra_exmods():
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del EXTRA_EXMODS[:]
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def get_allowed_exmods():
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return ALLOWED_EXMODS + EXTRA_EXMODS
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class JsonPayloadSerializer(messaging.NoOpSerializer):
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@staticmethod
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def fallback(obj):
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"""Serializer fallback
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This method is used to serialize an object which jsonutils.to_primitive
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does not otherwise know how to handle.
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This is mostly only needed in tests because of the use of the nova
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CheatingSerializer fixture which keeps some non-serializable fields
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on the RequestContext, like db_connection.
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"""
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if isinstance(obj, nova.context.RequestContext):
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# This matches RequestContextSerializer.serialize_context().
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return obj.to_dict()
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# The default fallback in jsonutils.to_primitive() is str.
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return str(obj)
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def serialize_entity(self, context, entity):
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return jsonutils.to_primitive(entity, convert_instances=True,
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fallback=self.fallback)
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class RequestContextSerializer(messaging.Serializer):
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def __init__(self, base):
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self._base = base
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def serialize_entity(self, context, entity):
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if not self._base:
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return entity
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return self._base.serialize_entity(context, entity)
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def deserialize_entity(self, context, entity):
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if not self._base:
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return entity
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return self._base.deserialize_entity(context, entity)
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def serialize_context(self, context):
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return context.to_dict()
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def deserialize_context(self, context):
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return nova.context.RequestContext.from_dict(context)
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class ProfilerRequestContextSerializer(RequestContextSerializer):
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def serialize_context(self, context):
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_context = super(ProfilerRequestContextSerializer,
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self).serialize_context(context)
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prof = profiler.get()
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if prof:
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# FIXME(DinaBelova): we'll add profiler.get_info() method
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# to extract this info -> we'll need to update these lines
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trace_info = {
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"hmac_key": prof.hmac_key,
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"base_id": prof.get_base_id(),
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"parent_id": prof.get_id()
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}
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_context.update({"trace_info": trace_info})
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return _context
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def deserialize_context(self, context):
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trace_info = context.pop("trace_info", None)
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if trace_info:
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profiler.init(**trace_info)
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return super(ProfilerRequestContextSerializer,
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self).deserialize_context(context)
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def get_transport_url(url_str=None):
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return messaging.TransportURL.parse(CONF, url_str)
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def get_client(target, version_cap=None, serializer=None,
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call_monitor_timeout=None):
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assert TRANSPORT is not None
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if profiler:
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serializer = ProfilerRequestContextSerializer(serializer)
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else:
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serializer = RequestContextSerializer(serializer)
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return messaging.get_rpc_client(TRANSPORT, target,
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version_cap=version_cap, serializer=serializer,
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call_monitor_timeout=call_monitor_timeout)
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def get_server(target, endpoints, serializer=None):
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assert TRANSPORT is not None
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if profiler:
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serializer = ProfilerRequestContextSerializer(serializer)
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else:
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serializer = RequestContextSerializer(serializer)
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access_policy = dispatcher.DefaultRPCAccessPolicy
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exc = "threading" if utils.concurrency_mode_threading() else "eventlet"
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return messaging.get_rpc_server(TRANSPORT,
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target,
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endpoints,
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executor=exc,
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serializer=serializer,
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access_policy=access_policy)
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def get_notifier(service, host=None):
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assert LEGACY_NOTIFIER is not None
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publisher_id = '%s.%s' % (service, host or CONF.host)
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return LegacyValidatingNotifier(
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LEGACY_NOTIFIER.prepare(publisher_id=publisher_id))
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def get_versioned_notifier(publisher_id):
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assert NOTIFIER is not None
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return NOTIFIER.prepare(publisher_id=publisher_id)
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def if_notifications_enabled(f):
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"""Calls decorated method only if versioned notifications are enabled."""
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@functools.wraps(f)
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def wrapped(*args, **kwargs):
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if (NOTIFIER.is_enabled() and
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CONF.notifications.notification_format in ('both',
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'versioned')):
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return f(*args, **kwargs)
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else:
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return None
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return wrapped
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def create_transport(url):
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exmods = get_allowed_exmods()
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return messaging.get_rpc_transport(CONF,
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url=url,
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allowed_remote_exmods=exmods)
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class LegacyValidatingNotifier(object):
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"""Wraps an oslo.messaging Notifier and checks for allowed event_types."""
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# If true an exception is thrown if the event_type is not allowed, if false
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# then only a WARNING is logged
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fatal = False
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# This list contains the already existing therefore allowed legacy
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# notification event_types. New items shall not be added to the list as
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# Nova does not allow new legacy notifications any more. This list will be
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# removed when all the notification is transformed to versioned
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# notifications.
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allowed_legacy_notification_event_types = [
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'aggregate.addhost.end',
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'aggregate.addhost.start',
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'aggregate.create.end',
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'aggregate.create.start',
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'aggregate.delete.end',
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'aggregate.delete.start',
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'aggregate.removehost.end',
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'aggregate.removehost.start',
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'aggregate.updatemetadata.end',
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'aggregate.updatemetadata.start',
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'aggregate.updateprop.end',
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'aggregate.updateprop.start',
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'compute.instance.create.end',
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'compute.instance.create.error',
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'compute.instance.create_ip.end',
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'compute.instance.create_ip.start',
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'compute.instance.create.start',
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'compute.instance.delete.end',
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'compute.instance.delete_ip.end',
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'compute.instance.delete_ip.start',
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'compute.instance.delete.start',
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'compute.instance.evacuate',
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'compute.instance.exists',
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'compute.instance.finish_resize.end',
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'compute.instance.finish_resize.start',
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'compute.instance.live.migration.abort.start',
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'compute.instance.live.migration.abort.end',
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'compute.instance.live.migration.force.complete.start',
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'compute.instance.live.migration.force.complete.end',
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'compute.instance.live_migration.post.dest.end',
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'compute.instance.live_migration.post.dest.start',
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'compute.instance.live_migration._post.end',
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'compute.instance.live_migration._post.start',
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'compute.instance.live_migration.pre.end',
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'compute.instance.live_migration.pre.start',
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'compute.instance.live_migration.rollback.dest.end',
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'compute.instance.live_migration.rollback.dest.start',
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'compute.instance.live_migration._rollback.end',
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'compute.instance.live_migration._rollback.start',
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'compute.instance.pause.end',
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'compute.instance.pause.start',
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'compute.instance.power_off.end',
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'compute.instance.power_off.start',
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'compute.instance.power_on.end',
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'compute.instance.power_on.start',
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'compute.instance.reboot.end',
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'compute.instance.reboot.error',
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'compute.instance.reboot.start',
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'compute.instance.rebuild.end',
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'compute.instance.rebuild.error',
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'compute.instance.rebuild.scheduled',
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'compute.instance.rebuild.start',
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'compute.instance.rescue.end',
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'compute.instance.rescue.start',
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'compute.instance.resize.confirm.end',
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'compute.instance.resize.confirm.start',
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'compute.instance.resize.end',
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'compute.instance.resize.error',
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'compute.instance.resize.prep.end',
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'compute.instance.resize.prep.start',
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'compute.instance.resize.revert.end',
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'compute.instance.resize.revert.start',
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'compute.instance.resize.start',
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'compute.instance.restore.end',
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'compute.instance.restore.start',
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'compute.instance.resume.end',
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'compute.instance.resume.start',
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'compute.instance.shelve.end',
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'compute.instance.shelve_offload.end',
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'compute.instance.shelve_offload.start',
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'compute.instance.shelve.start',
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'compute.instance.shutdown.end',
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'compute.instance.shutdown.start',
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'compute.instance.snapshot.end',
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'compute.instance.snapshot.start',
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'compute.instance.soft_delete.end',
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'compute.instance.soft_delete.start',
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'compute.instance.suspend.end',
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'compute.instance.suspend.start',
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'compute.instance.trigger_crash_dump.end',
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'compute.instance.trigger_crash_dump.start',
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'compute.instance.unpause.end',
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'compute.instance.unpause.start',
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'compute.instance.unrescue.end',
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'compute.instance.unrescue.start',
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'compute.instance.unshelve.start',
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'compute.instance.unshelve.end',
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'compute.instance.update',
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'compute.instance.volume.attach',
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'compute.instance.volume.detach',
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'compute.libvirt.error',
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'compute.metrics.update',
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'compute_task.build_instances',
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'compute_task.migrate_server',
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'compute_task.rebuild_server',
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'HostAPI.power_action.end',
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'HostAPI.power_action.start',
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'HostAPI.set_enabled.end',
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'HostAPI.set_enabled.start',
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'HostAPI.set_maintenance.end',
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'HostAPI.set_maintenance.start',
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'keypair.create.start',
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'keypair.create.end',
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'keypair.delete.start',
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'keypair.delete.end',
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'keypair.import.start',
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'keypair.import.end',
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'network.floating_ip.allocate',
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'network.floating_ip.associate',
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'network.floating_ip.deallocate',
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'network.floating_ip.disassociate',
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'scheduler.select_destinations.end',
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'scheduler.select_destinations.start',
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'servergroup.addmember',
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'servergroup.create',
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'servergroup.delete',
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'volume.usage',
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]
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message = _('%(event_type)s is not a versioned notification and not '
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'whitelisted. See ./doc/source/reference/notifications.rst')
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def __init__(self, notifier):
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self.notifier = notifier
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for priority in ['debug', 'info', 'warn', 'error', 'critical']:
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setattr(self, priority,
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functools.partial(self._notify, priority))
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def _is_wrap_exception_notification(self, payload):
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# nova.exception_wrapper.wrap_exception decorator emits notification
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# where the event_type is the name of the decorated function. This
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# is used in many places but it will be converted to versioned
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# notification in one run by updating the decorator so it is pointless
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# to white list all the function names here we white list the
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# notification itself detected by the special payload keys.
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return {'exception', 'args'} == set(payload.keys())
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def _notify(self, priority, ctxt, event_type, payload):
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if (event_type not in self.allowed_legacy_notification_event_types and
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not self._is_wrap_exception_notification(payload)):
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if self.fatal:
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raise AssertionError(self.message % {'event_type': event_type})
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else:
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LOG.warning(self.message, {'event_type': event_type})
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getattr(self.notifier, priority)(ctxt, event_type, payload)
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class ClientRouter(periodic_task.PeriodicTasks):
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"""Creates RPC clients that honor the context's RPC transport
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or provides a default.
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"""
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def __init__(self, default_client):
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super(ClientRouter, self).__init__(CONF)
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self.default_client = default_client
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self.target = default_client.target
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self.version_cap = default_client.version_cap
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self.serializer = default_client.serializer
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def client(self, context):
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transport = context.mq_connection
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if transport:
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cmt = self.default_client.call_monitor_timeout
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return messaging.get_rpc_client(transport, self.target,
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version_cap=self.version_cap,
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serializer=self.serializer,
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call_monitor_timeout=cmt)
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else:
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return self.default_client
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