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Merge "Test for disabling greendns" into stable/train

changes/33/759533/7
Zuul 3 weeks ago
committed by Gerrit Code Review
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commit
04298cfb3e
1 changed files with 45 additions and 0 deletions
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      nova/tests/functional/test_monkey_patch.py

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nova/tests/functional/test_monkey_patch.py View File

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# Copyright 2020 Red Hat, Inc. All rights reserved.
#
# 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.
# NOTE(artom) This file exists to test eventlet monkeypatching. How and what
# eventlet monkeypatches can be controlled by environment variables that
# are processed by eventlet at import-time (for exmaple, EVENTLET_NO_GREENDNS).
# Nova manages all of this in nova.monkey_patch. Therefore, nova.monkey_patch
# must be the first thing to import eventlet. As nova.tests.functional.__init__
# imports nova.monkey_patch, we're OK here.
import socket
import traceback
from nova import test
class TestMonkeyPatch(test.TestCase):
def test_greendns_is_disabled(self):
"""Try to resolve a fake fqdn. If we see greendns mentioned in the
traceback of the raised exception, it means we've not actually disabled
greendns. See the TODO and NOTE in nova.monkey_patch to understand why
greendns needs to be disabled.
"""
raised = False
try:
socket.gethostbyname('goat.fake')
except Exception:
tb = traceback.format_exc()
# NOTE(artom) If we've correctly disabled greendns, we expect the
# traceback to not contain any reference to it.
self.assertNotIn('greendns.py', tb)
raised = True
self.assertTrue(raised)

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