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# 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 functools
import inspect
from oslo_utils import excutils
import nova.conf
from nova.notifications.objects import base
from nova.notifications.objects import exception as exception_obj
from nova.objects import fields
from nova import rpc
from nova import safe_utils
CONF = nova.conf.CONF
@rpc.if_notifications_enabled
def _emit_versioned_exception_notification(context, exception, source):
payload = exception_obj.ExceptionPayload.from_exception(exception)
publisher = base.NotificationPublisher(host=CONF.host, source=source)
event_type = base.EventType(
object='compute',
action=fields.NotificationAction.EXCEPTION,
)
notification = exception_obj.ExceptionNotification(
publisher=publisher,
event_type=event_type,
priority=fields.NotificationPriority.ERROR,
payload=payload,
)
notification.emit(context)
def _emit_legacy_exception_notification(
context, exception, service, function_name, args,
):
notifier = rpc.get_notifier(service)
payload = {'exception': exception, 'args': args}
notifier.error(context, function_name, payload)
def wrap_exception(service, binary):
"""This decorator wraps a method to catch any exceptions that may
get thrown. It also optionally sends the exception to the notification
system.
"""
def inner(f):
def wrapped(self, context, *args, **kw):
# Don't store self or context in the payload, it now seems to
# contain confidential information.
try:
return f(self, context, *args, **kw)
except Exception as exc:
with excutils.save_and_reraise_exception():
call_dict = _get_call_dict(f, self, context, *args, **kw)
function_name = f.__name__
_emit_legacy_exception_notification(
context, exc, service, function_name, call_dict)
_emit_versioned_exception_notification(
context, exc, binary)
return functools.wraps(f)(wrapped)
return inner
def _get_call_dict(function, self, context, *args, **kw):
wrapped_func = safe_utils.get_wrapped_function(function)
call_dict = inspect.getcallargs(wrapped_func, self,
context, *args, **kw)
# self can't be serialized and shouldn't be in the
# payload
call_dict.pop('self', None)
# NOTE(gibi) remove context as well as it contains sensitive information
# and it can also contain circular references
call_dict.pop('context', None)
return _cleanse_dict(call_dict)
def _cleanse_dict(original):
"""Strip all admin_password, new_pass, rescue_pass keys from a dict."""
return {k: v for k, v in original.items() if "_pass" not in k}
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