467 lines
14 KiB
Python
467 lines
14 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");
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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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"""Magnum base exception handling.
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Includes decorator for re-raising Magnum-type exceptions.
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"""
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import functools
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import sys
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import uuid
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from keystoneclient import exceptions as keystone_exceptions
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from oslo_config import cfg
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from oslo_log import log as logging
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from oslo_utils import excutils
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import pecan
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import six
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import wsme
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from magnum.common import safe_utils
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from magnum.i18n import _
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from magnum.i18n import _LE
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LOG = logging.getLogger(__name__)
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CONF = cfg.CONF
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try:
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CONF.import_opt('fatal_exception_format_errors',
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'oslo_versionedobjects.exception')
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except cfg.NoSuchOptError as e:
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# Note:work around for magnum run against master branch
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# in devstack gate job, as magnum not branched yet
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# verisonobjects kilo/master different version can
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# cause issue here. As it changed import group. So
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# add here before branch to prevent gate failure.
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# Bug: #1447873
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CONF.import_opt('fatal_exception_format_errors',
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'oslo_versionedobjects.exception',
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group='oslo_versionedobjects')
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def wrap_exception(notifier=None, publisher_id=None, event_type=None,
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level=None):
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"""This decorator wraps a method to catch any exceptions.
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It logs the exception as well as optionally sending
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it to the notification 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:
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call_dict = safe_utils.getcallargs(f, *args, **kw)
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payload = dict(exception=e,
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private=dict(args=call_dict)
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)
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# Use a temp vars so we don't shadow
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# our outer definitions.
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temp_level = level
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if not temp_level:
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temp_level = notifier.ERROR
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temp_type = event_type
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if not temp_type:
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# If f has multiple decorators, they must use
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# functools.wraps to ensure the name is
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# propagated.
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temp_type = f.__name__
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notifier.notify(context, publisher_id, temp_type,
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temp_level, payload)
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return functools.wraps(f)(wrapped)
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return inner
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OBFUSCATED_MSG = _('Your request could not be handled '
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'because of a problem in the server. '
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'Error Correlation id is: %s')
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def wrap_controller_exception(func, func_server_error, func_client_error):
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"""This decorator wraps controllers methods to handle exceptions:
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- if an unhandled Exception or a MagnumException with an error code >=500
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is catched, raise a http 5xx ClientSideError and correlates it with a log
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message
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- if a MagnumException is catched and its error code is <500, raise a http
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4xx and logs the excp in debug mode
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"""
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@functools.wraps(func)
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def wrapped(*args, **kw):
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try:
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return func(*args, **kw)
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except Exception as excp:
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if isinstance(excp, MagnumException):
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http_error_code = excp.code
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else:
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http_error_code = 500
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if http_error_code >= 500:
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# log the error message with its associated
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# correlation id
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log_correlation_id = str(uuid.uuid4())
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LOG.error(_LE("%(correlation_id)s:%(excp)s") %
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{'correlation_id': log_correlation_id,
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'excp': str(excp)})
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# raise a client error with an obfuscated message
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func_server_error(log_correlation_id, http_error_code)
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else:
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# raise a client error the original message
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LOG.debug(excp)
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func_client_error(excp, http_error_code)
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return wrapped
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def wrap_wsme_controller_exception(func):
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"""This decorator wraps wsme controllers to handle exceptions."""
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def _func_server_error(log_correlation_id, status_code):
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raise wsme.exc.ClientSideError(
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six.text_type(OBFUSCATED_MSG % log_correlation_id), status_code)
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def _func_client_error(excp, status_code):
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raise wsme.exc.ClientSideError(six.text_type(excp), status_code)
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return wrap_controller_exception(func,
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_func_server_error,
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_func_client_error)
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def wrap_pecan_controller_exception(func):
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"""This decorator wraps pecan controllers to handle exceptions."""
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def _func_server_error(log_correlation_id, status_code):
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pecan.response.status = status_code
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pecan.response.text = six.text_type(OBFUSCATED_MSG %
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log_correlation_id)
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def _func_client_error(excp, status_code):
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pecan.response.status = status_code
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pecan.response.text = six.text_type(excp)
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pecan.response.content_type = None
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return wrap_controller_exception(func,
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_func_server_error,
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_func_client_error)
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def wrap_keystone_exception(func):
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"""Wrap keystone exceptions and throw Magnum specific exceptions."""
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@functools.wraps(func)
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def wrapped(*args, **kw):
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try:
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return func(*args, **kw)
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except keystone_exceptions.AuthorizationFailure:
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raise AuthorizationFailure(
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client=func.__name__, message="reason: %s" % sys.exc_info()[1])
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except keystone_exceptions.ClientException:
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raise AuthorizationFailure(
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client=func.__name__,
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message="unexpected keystone client error occurred: %s"
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% sys.exc_info()[1])
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return wrapped
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class MagnumException(Exception):
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"""Base Magnum Exception
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To correctly use this class, inherit from it and define
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a 'message' property. That message will get printf'd
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with the keyword arguments provided to the constructor.
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"""
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message = _("An unknown exception occurred.")
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code = 500
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def __init__(self, message=None, **kwargs):
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self.kwargs = kwargs
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if 'code' not in self.kwargs:
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try:
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self.kwargs['code'] = self.code
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except AttributeError:
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pass
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if message:
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self.message = message
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try:
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self.message = self.message % kwargs
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except Exception as e:
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# kwargs doesn't match a variable in the message
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# log the issue and the kwargs
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LOG.exception(_LE('Exception in string format operation'))
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for name, value in kwargs.iteritems():
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LOG.error(_LE("%(name)s: %(value)s") %
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{'name': name, 'value': value})
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try:
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if CONF.fatal_exception_format_errors:
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raise e
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except cfg.NoSuchOptError:
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# Note: work around for Bug: #1447873
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if CONF.oslo_versionedobjects.fatal_exception_format_errors:
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raise e
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super(MagnumException, self).__init__(self.message)
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def __str__(self):
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if six.PY3:
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return self.message
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return self.message.encode('utf-8')
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def __unicode__(self):
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return self.message
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def format_message(self):
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if self.__class__.__name__.endswith('_Remote'):
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return self.args[0]
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else:
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return six.text_type(self)
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class ObjectNotFound(MagnumException):
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message = _("The %(name)s %(id)s could not be found.")
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class ObjectNotUnique(MagnumException):
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message = _("The %(name)s already exists.")
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class ResourceNotFound(ObjectNotFound):
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message = _("The %(name)s resource %(id)s could not be found.")
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code = 404
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class ResourceExists(ObjectNotUnique):
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message = _("The %(name)s resource already exists.")
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code = 409
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class AuthorizationFailure(MagnumException):
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message = _("%(client)s connection failed. %(message)s")
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class UnsupportedObjectError(MagnumException):
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message = _('Unsupported object type %(objtype)s')
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class IncompatibleObjectVersion(MagnumException):
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message = _('Version %(objver)s of %(objname)s is not supported')
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class OrphanedObjectError(MagnumException):
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message = _('Cannot call %(method)s on orphaned %(objtype)s object')
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class Invalid(MagnumException):
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message = _("Unacceptable parameters.")
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code = 400
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class InvalidUUID(Invalid):
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message = _("Expected a uuid but received %(uuid)s.")
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class InvalidName(Invalid):
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message = _("Expected a name but received %(uuid)s.")
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class InvalidUuidOrName(Invalid):
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message = _("Expected a name or uuid but received %(uuid)s.")
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class InvalidIdentity(Invalid):
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message = _("Expected an uuid or int but received %(identity)s.")
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class HTTPNotFound(ResourceNotFound):
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pass
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class Conflict(MagnumException):
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message = _('Conflict.')
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code = 409
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class InvalidState(Conflict):
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message = _("Invalid resource state.")
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# Cannot be templated as the error syntax varies.
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# msg needs to be constructed when raised.
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class InvalidParameterValue(Invalid):
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message = _("%(err)s")
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class InstanceAssociated(Conflict):
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message = _("Instance %(instance_uuid)s is already associated with a node,"
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" it cannot be associated with this other node %(node)s")
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class InstanceNotFound(ResourceNotFound):
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message = _("Instance %(instance)s could not be found.")
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class PatchError(Invalid):
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message = _("Couldn't apply patch '%(patch)s'. Reason: %(reason)s")
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class NotAuthorized(MagnumException):
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message = _("Not authorized.")
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code = 403
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class OperationNotPermitted(NotAuthorized):
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message = _("Operation not permitted.")
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class InvalidMAC(Invalid):
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message = _("Expected a MAC address but received %(mac)s.")
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class ConfigInvalid(MagnumException):
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message = _("Invalid configuration file. %(error_msg)s")
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class NodeAlreadyExists(Conflict):
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message = _("A node with UUID %(uuid)s already exists.")
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class NodeNotFound(ResourceNotFound):
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message = _("Node %(node)s could not be found.")
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class NodeAssociated(InvalidState):
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message = _("Node %(node)s is associated with instance %(instance)s.")
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class SSHConnectFailed(MagnumException):
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message = _("Failed to establish SSH connection to host %(host)s.")
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class FileSystemNotSupported(MagnumException):
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message = _("Failed to create a file system. "
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"File system %(fs)s is not supported.")
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class BayModelNotFound(ResourceNotFound):
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message = _("Baymodel %(baymodel)s could not be found.")
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class BayModelAlreadyExists(Conflict):
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message = _("A baymodel with UUID %(uuid)s already exists.")
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class BayModelReferenced(Invalid):
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message = _("Baymodel %(baymodel)s is referenced by one or multiple bays.")
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class BayNotFound(ResourceNotFound):
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message = _("Bay %(bay)s could not be found.")
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class BayAlreadyExists(Conflict):
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message = _("A node with UUID %(uuid)s already exists.")
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class ContainerNotFound(ResourceNotFound):
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message = _("Container %(container)s could not be found.")
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class ContainerAlreadyExists(Conflict):
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message = _("A container with UUID %(uuid)s already exists.")
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class PodNotFound(ResourceNotFound):
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message = _("Pod %(pod)s could not be found.")
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class PodAlreadyExists(Conflict):
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message = _("A node with UUID %(uuid)s already exists.")
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class ReplicationControllerNotFound(ResourceNotFound):
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message = _("ReplicationController %(rc)s could not be found.")
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class ReplicationControllerAlreadyExists(Conflict):
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message = _("A ReplicationController with UUID %(uuid)s already exists.")
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class ServiceNotFound(ResourceNotFound):
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message = _("Service %(service)s could not be found.")
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class ServiceAlreadyExists(Conflict):
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message = _("A node with UUID %(uuid)s already exists.")
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class ContainerException(Exception):
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pass
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class NotSupported(MagnumException):
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message = _("%(operation)s is not supported.")
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code = 400
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class BayTypeNotSupported(MagnumException):
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message = _("Bay type (%(platform)s, %(os)s, %(coe)s) not supported.")
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class BayTypeNotEnabled(MagnumException):
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message = _("Bay type (%(platform)s, %(os)s, %(coe)s) not enabled.")
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class RequiredParameterNotProvided(MagnumException):
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message = _("Required parameter %(heat_param)s not provided.")
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class Urllib2InvalidScheme(MagnumException):
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message = _("The urllib2 URL %(url) has an invalid scheme.")
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class OperationInProgress(Invalid):
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message = _("Bay %(bay_name)s already has an operation in progress.")
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class ImageNotFound(ResourceNotFound):
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message = _("Image %(image_id)s could not be found.")
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class ImageNotAuthorized(MagnumException):
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message = _("Not authorized for image %(image_id)s.")
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class OSDistroFieldNotFound(ResourceNotFound):
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message = _("Image %(image_id)s doesn't contain os-distro field.")
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class KubernetesAPIFailed(MagnumException):
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def __init__(self, message=None, **kwargs):
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self.__class__.code = kwargs.get('code')
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super(KubernetesAPIFailed, self).__init__(message, **kwargs)
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