6329d721ef
A new versioned notification is emitted from the wrap_exception decorator. Change-Id: I8fcbce111537dae6ad3ba0961fb761540ae800ed Partially-Implements: bp versioned-notification-transformation-newton
95 lines
3.5 KiB
Python
95 lines
3.5 KiB
Python
# 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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import inspect
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from oslo_utils import excutils
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import six
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import nova.conf
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from nova.notifications.objects import base
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from nova.notifications.objects import exception
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from nova.objects import fields
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from nova import safe_utils
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CONF = nova.conf.CONF
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def _emit_exception_notification(notifier, context, ex, function_name, args,
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binary):
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_emit_legacy_exception_notification(notifier, context, ex, function_name,
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args)
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_emit_versioned_exception_notification(context, ex, binary)
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def _emit_versioned_exception_notification(context, ex, binary):
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versioned_exception_payload = exception.ExceptionPayload.from_exception(ex)
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publisher = base.NotificationPublisher(context=context, host=CONF.host,
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binary=binary)
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event_type = base.EventType(
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object='compute',
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action=fields.NotificationAction.EXCEPTION)
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notification = exception.ExceptionNotification(
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publisher=publisher,
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event_type=event_type,
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priority=fields.NotificationPriority.ERROR,
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payload=versioned_exception_payload)
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notification.emit(context)
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def _emit_legacy_exception_notification(notifier, context, ex, function_name,
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args):
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payload = dict(exception=ex, args=args)
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notifier.error(context, function_name, payload)
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def wrap_exception(notifier=None, get_notifier=None, binary=None):
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"""This decorator wraps a method to catch any exceptions that may
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get thrown. It also optionally sends the exception to the notification
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system.
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"""
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def inner(f):
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def wrapped(self, context, *args, **kw):
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# Don't store self or context in the payload, it now seems to
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# contain confidential information.
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try:
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return f(self, context, *args, **kw)
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except Exception as e:
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with excutils.save_and_reraise_exception():
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if notifier or get_notifier:
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call_dict = _get_call_dict(
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f, self, context, *args, **kw)
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function_name = f.__name__
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_emit_exception_notification(
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notifier or get_notifier(), context, e,
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function_name, call_dict, binary)
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return functools.wraps(f)(wrapped)
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return inner
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def _get_call_dict(function, self, context, *args, **kw):
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wrapped_func = safe_utils.get_wrapped_function(function)
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call_dict = inspect.getcallargs(wrapped_func, self,
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context, *args, **kw)
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# self can't be serialized and shouldn't be in the
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# payload
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call_dict.pop('self', None)
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return _cleanse_dict(call_dict)
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def _cleanse_dict(original):
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"""Strip all admin_password, new_pass, rescue_pass keys from a dict."""
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return {k: v for k, v in six.iteritems(original) if "_pass" not in k}
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