Source code for glance.tests.functional.v1.test_multiprocessing

# Copyright 2012 OpenStack Foundation
# 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
#    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 time

import httplib2
import psutil
# NOTE(jokke): simplified transition to py3, behaves like py2 xrange
from six.moves import range

from glance.tests import functional
from glance.tests.utils import execute

[docs]class TestMultiprocessing(functional.FunctionalTest): """Functional tests for the bin/glance CLI tool"""
[docs] def setUp(self): self.workers = 2 super(TestMultiprocessing, self).setUp()
[docs] def test_multiprocessing(self): """Spin up the api servers with multiprocessing on""" self.cleanup() self.start_servers(**self.__dict__.copy()) path = "http://%s:%d/v1/images" % ("", self.api_port) http = httplib2.Http() response, content = http.request(path, 'GET') self.assertEqual(200, response.status) self.assertEqual(b'{"images": []}', content) self.stop_servers()
def _get_children(self): api_pid = self.api_server.process_pid process = psutil.Process(api_pid) children = process.get_children() pids = [str( for child in children] return pids
[docs] def test_interrupt_avoids_respawn_storm(self): """ Ensure an interrupt signal does not cause a respawn storm. See bug #978130 """ self.start_servers(**self.__dict__.copy()) children = self._get_children() cmd = "kill -INT %s" % ' '.join(children) execute(cmd, raise_error=True) for _ in range(9): # Yeah. This totally isn't a race condition. Randomly fails # set at 0.05. Works most of the time at 0.10 time.sleep(0.10) # ensure number of children hasn't grown self.assertGreaterEqual(len(children), len(self._get_children())) for child in self._get_children(): # ensure no new children spawned self.assertIn(child, children, child) self.stop_servers()

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