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# Copyright (c) 2014 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.
from oslo_config import cfg
from neutron._i18n import _
from neutron.agent.linux import external_process
from neutron.agent.linux import ip_lib
from neutron.agent.linux import keepalived
from neutron.common import utils as common_utils
from neutron.conf.agent.l3 import config as l3_config
from neutron.tests.common import net_helpers
from neutron.tests.functional.agent.linux import helpers
from neutron.tests.functional import base
from neutron.tests.unit.agent.linux import test_keepalived
from neutron_lib.exceptions import ProcessExecutionError
class KeepalivedManagerTestCase(base.BaseSudoTestCase,
test_keepalived.KeepalivedConfBaseMixin):
def setUp(self):
super(KeepalivedManagerTestCase, self).setUp()
l3_config.register_l3_agent_config_opts(l3_config.OPTS, cfg.CONF)
cfg.CONF.set_override('check_child_processes_interval', 1, 'AGENT')
self.expected_config = self._get_config()
self.process_monitor = external_process.ProcessMonitor(cfg.CONF,
'router')
self.namespace = self.useFixture(net_helpers.NamespaceFixture()).name
self.ip_wrapper = ip_lib.IPWrapper(namespace=self.namespace)
self._prepare_devices()
self.manager = keepalived.KeepalivedManager(
'router1', self.expected_config, self.process_monitor,
conf_path=cfg.CONF.state_path,
namespace=self.namespace)
self.addCleanup(self._stop_keepalived_manager)
def _stop_keepalived_manager(self):
try:
self.manager.disable()
except ProcessExecutionError as process_err:
# self.manager.disable() will perform SIGTERM->wait->SIGKILL
# (if needed) on the process. However, it is sometimes possible
# that SIGKILL gets called on a process that just exited due to
# SIGTERM. Ignore this condition so the test is not marked as
# failed.
if not (len(process_err.args) > 0 and
"No such process" in process_err.args[0]):
raise
def _prepare_devices(self):
# NOTE(slaweq): those are devices used in keepalived config file,
# prepared by self._get_config() method which is defined in
# neutron.tests.unit.agent.linux.test_keepalived module
dev_names = ['eth0', 'eth1', 'eth2', 'eth4', 'eth6', 'eth10']
for name in dev_names:
ip_device = self.ip_wrapper.add_dummy(name)
if name == 'eth0':
ip_device.link.set_up()
ip_device.addr.add('169.254.201.1/16')
def _spawn_keepalived(self, keepalived_manager):
keepalived_manager.spawn()
process = keepalived_manager.get_process()
common_utils.wait_until_true(
lambda: process.active,
timeout=5,
sleep=0.01,
exception=RuntimeError(_("Keepalived didn't spawn")))
return process
def test_keepalived_spawn(self):
self._spawn_keepalived(self.manager)
self.assertEqual(self.expected_config.get_config_str(),
self.manager.get_conf_on_disk())
def _test_keepalived_respawns(self, normal_exit=True):
process = self._spawn_keepalived(self.manager)
pid = process.pid
exit_code = '-15' if normal_exit else '-9'
# Exit the process, and see that when it comes back
# It's indeed a different process
self.ip_wrapper.netns.execute(['kill', exit_code, pid],
privsep_exec=True)
common_utils.wait_until_true(
lambda: process.active and pid != process.pid,
timeout=5,
sleep=0.01,
exception=RuntimeError(_("Keepalived didn't respawn")))
def test_keepalived_respawns(self):
self._test_keepalived_respawns()
def test_keepalived_respawn_with_unexpected_exit(self):
self._test_keepalived_respawns(False)
def _test_keepalived_spawns_conflicting_pid(self, process, pid_file):
# Test the situation when keepalived PID file contains PID of an
# existing non-keepalived process. This situation can happen e.g.
# after hard node reset.
spawn_process = helpers.SleepyProcessFixture()
self.useFixture(spawn_process)
with open(pid_file, "w") as f_pid_file:
f_pid_file.write("%s" % spawn_process.pid)
self._spawn_keepalived(self.manager)
def test_keepalived_spawns_conflicting_pid_base_process(self):
self.skipTest('bug 1921154')
process = self.manager.get_process()
pid_file = process.get_pid_file_name()
self._test_keepalived_spawns_conflicting_pid(process, pid_file)
def test_keepalived_spawns_conflicting_pid_vrrp_subprocess(self):
self.skipTest('bug 1921154')
process = self.manager.get_process()
pid_file = process.get_pid_file_name()
self._test_keepalived_spawns_conflicting_pid(
process,
self.manager.get_vrrp_pid_file_name(pid_file))
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