Switch to use exception from ironic-lib
The exception modules in ironic and ironic-lib contain the same almost identical class IronicException. With this patch we directly use the one in ironic-lib. Updating requirements and lower-constraints to use compatible version of ironic-lib. Also deprecating duplicated fatal_exception_format_errors option. Change-Id: I1ce0d12d912020346425fd658d3b1807607455a4 Story: 1626578 Task: 10515
This commit is contained in:
Riccardo Pittau
parent
5e4edeab97
commit
f5dbf8ba0c
@ -14,132 +14,17 @@
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# License for the specific language governing permissions and limitations
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# under the License.
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"""Ironic base exception handling.
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SHOULD include dedicated exception logging.
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"""
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import collections
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"""Ironic specific exceptions list."""
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from ironic_lib.exception import IronicException
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from oslo_log import log as logging
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from oslo_serialization import jsonutils
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import six
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from six.moves import http_client
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from ironic.common.i18n import _
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from ironic.conf import CONF
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LOG = logging.getLogger(__name__)
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def _ensure_exception_kwargs_serializable(exc_class_name, kwargs):
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"""Ensure that kwargs are serializable
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Ensure that all kwargs passed to exception constructor can be passed over
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RPC, by trying to convert them to JSON, or, as a last resort, to string.
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If it is not possible, unserializable kwargs will be removed, letting the
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receiver to handle the exception string as it is configured to.
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:param exc_class_name: an IronicException class name.
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:param kwargs: a dictionary of keyword arguments passed to the exception
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constructor.
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:returns: a dictionary of serializable keyword arguments.
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"""
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serializers = [(jsonutils.dumps, _('when converting to JSON')),
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(six.text_type, _('when converting to string'))]
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exceptions = collections.defaultdict(list)
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serializable_kwargs = {}
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for k, v in kwargs.items():
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for serializer, msg in serializers:
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try:
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serializable_kwargs[k] = serializer(v)
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exceptions.pop(k, None)
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break
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except Exception as e:
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exceptions[k].append(
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'(%(serializer_type)s) %(e_type)s: %(e_contents)s' %
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{'serializer_type': msg, 'e_contents': e,
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'e_type': e.__class__.__name__})
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if exceptions:
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LOG.error("One or more arguments passed to the %(exc_class)s "
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"constructor as kwargs can not be serialized. The "
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"serialized arguments: %(serialized)s. These "
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"unserialized kwargs were dropped because of the "
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"exceptions encountered during their "
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"serialization:\n%(errors)s",
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dict(errors=';\n'.join("%s: %s" % (k, '; '.join(v))
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for k, v in exceptions.items()),
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exc_class=exc_class_name,
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serialized=serializable_kwargs))
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# We might be able to actually put the following keys' values into
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# format string, but there is no guarantee, drop it just in case.
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for k in exceptions:
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del kwargs[k]
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return serializable_kwargs
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class IronicException(Exception):
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"""Base Ironic Exception
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To correctly use this class, inherit from it and define
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a '_msg_fmt' property. That message will get printf'd
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with the keyword arguments provided to the constructor.
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If you need to access the message from an exception you should use
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six.text_type(exc)
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"""
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_msg_fmt = _("An unknown exception occurred.")
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code = http_client.INTERNAL_SERVER_ERROR
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safe = False
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def __init__(self, message=None, **kwargs):
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self.kwargs = _ensure_exception_kwargs_serializable(
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self.__class__.__name__, 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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else:
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self.code = int(kwargs['code'])
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if not message:
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try:
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message = self._msg_fmt % kwargs
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except Exception as e:
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# kwargs doesn't match a variable in self._msg_fmt
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# log the issue and the kwargs
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prs = ', '.join('%s: %s' % pair for pair in kwargs.items())
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LOG.exception('Exception in string format operation '
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'(arguments %s)', prs)
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if CONF.fatal_exception_format_errors:
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raise e
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else:
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# at least get the core self._msg_fmt out if something
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# happened
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message = self._msg_fmt
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super(IronicException, self).__init__(message)
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def __str__(self):
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"""Encode to utf-8 then wsme api can consume it as well."""
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value = self.__unicode__()
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if six.PY3:
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# On Python 3 unicode is the same as str
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return value
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else:
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return value.encode('utf-8')
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def __unicode__(self):
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"""Return a unicode representation of the exception message."""
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return six.text_type(self.args[0])
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class NotAuthorized(IronicException):
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_msg_fmt = _("Not authorized.")
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code = http_client.FORBIDDEN
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@ -157,10 +157,13 @@ exc_log_opts = [
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help=_('Used if there is a formatting error when generating '
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'an exception message (a programming error). If True, '
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'raise an exception; if False, use the unformatted '
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'message.')),
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'message.'),
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deprecated_for_removal=True,
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deprecated_reason=_('Same option in the ironic_lib section '
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'should be used instead.')),
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cfg.IntOpt('log_in_db_max_size', default=4096,
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help=_('Max number of characters of any node '
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'last_error/maintenance_reason pushed to database.'))
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'last_error/maintenance_reason pushed to database.')),
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]
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hash_opts = [
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@ -1,81 +0,0 @@
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# Copyright (c) 2015 IBM, Corp.
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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 re
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import mock
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import six
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from ironic.common import exception
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from ironic.tests import base
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class Unserializable(object):
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def __str__(self):
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raise NotImplementedError('nostr')
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class TestException(exception.IronicException):
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_msg_fmt = 'Some exception: %(spam)s, %(ham)s'
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class TestIronicException(base.TestCase):
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def test___str__encoding(self):
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expected = b'\xc3\xa9\xe0\xaf\xb2\xe0\xbe\x84'
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if six.PY3:
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expected = expected.decode('utf-8')
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message = six.unichr(233) + six.unichr(0x0bf2) + six.unichr(3972)
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exc = exception.IronicException(message)
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self.assertEqual(expected, exc.__str__())
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def test___str__non_string(self):
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exc = exception.IronicException(42)
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self.assertEqual("42", exc.__str__())
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self.assertEqual(u"42", exc.__unicode__())
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@mock.patch.object(exception.LOG, 'error', autospec=True)
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def test___init___invalid_kwarg(self, log_mock):
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self.config(fatal_exception_format_errors=False)
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e = TestException(spam=Unserializable(), ham='eggs')
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message = log_mock.call_args[0][0] % log_mock.call_args[0][1]
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self.assertIsNotNone(
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re.search('spam: .*JSON.* ValueError: Circular reference detected;'
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'.*string.* NotImplementedError: nostr', message)
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)
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self.assertEqual({'ham': '"eggs"', 'code': 500}, e.kwargs)
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@mock.patch.object(exception.LOG, 'error', autospec=True)
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def test___init___invalid_kwarg_reraise(self, log_mock):
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self.config(fatal_exception_format_errors=True)
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self.assertRaises(KeyError, TestException, spam=Unserializable(),
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ham='eggs')
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message = log_mock.call_args[0][0] % log_mock.call_args[0][1]
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self.assertIsNotNone(
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re.search('spam: .*JSON.* ValueError: Circular reference detected;'
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'.*string.* NotImplementedError: nostr', message)
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)
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def test___init___json_serializable(self):
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exc = TestException(spam=[1, 2, 3], ham='eggs')
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self.assertIn('[1, 2, 3]', six.text_type(exc))
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self.assertEqual('[1, 2, 3]', exc.kwargs['spam'])
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def test___init___string_serializable(self):
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exc = TestException(
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spam=type('ni', (object,), dict(a=1, b=2))(), ham='eggs'
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)
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check_str = 'ni object at'
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self.assertIn(check_str, six.text_type(exc))
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self.assertIn(check_str, exc.kwargs['spam'])
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@ -199,7 +199,7 @@ class TestService(test_base.TestCase):
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'message': 'some error',
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'code': 500,
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'data': {
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'class': 'ironic.common.exception.IronicException'
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'class': 'ironic_lib.exception.IronicException'
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}
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})
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@ -38,7 +38,7 @@ greenlet==0.4.13
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hacking==1.0.0
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idna==2.6
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imagesize==1.0.0
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ironic-lib==2.17.0
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ironic-lib==2.17.1
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iso8601==0.1.11
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Jinja2==2.10
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jmespath==0.9.3
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@ -0,0 +1,9 @@
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---
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deprecations:
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- The configuration option ``[DEFAULT]/fatal_exception_format_errors`` is now
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deprecated.
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Please use the configuration option
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``[ironic_lib]/fatal_exception_format_errors`` instead.
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other:
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- Use the module exception from ironic-lib.
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Update ironic-lib minimum version required to 2.17.1.
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@ -11,7 +11,7 @@ python-cinderclient!=4.0.0,>=3.3.0 # Apache-2.0
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python-neutronclient>=6.7.0 # Apache-2.0
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python-glanceclient>=2.8.0 # Apache-2.0
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keystoneauth1>=3.4.0 # Apache-2.0
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ironic-lib>=2.17.0 # Apache-2.0
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ironic-lib>=2.17.1 # Apache-2.0
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python-swiftclient>=3.2.0 # Apache-2.0
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pytz>=2013.6 # MIT
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stevedore>=1.20.0 # Apache-2.0
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@ -4,6 +4,7 @@ wrap_width = 62
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namespace = ironic
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namespace = ironic_lib.disk_utils
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namespace = ironic_lib.disk_partitioner
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namespace = ironic_lib.exception
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namespace = ironic_lib.mdns
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namespace = ironic_lib.metrics
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namespace = ironic_lib.metrics_statsd
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