OpenStack Networking (Neutron)
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# Copyright 2015 Red Hat, Inc.
#
# 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 concurrent import futures
import itertools
import os
import random
import netaddr
from neutron_lib.tests import tools
from oslo_config import cfg
from oslo_log import log as logging
from neutron.agent.linux import ip_lib
from neutron.common import utils as common_utils
from neutron.conf.agent import common as config
from neutron.tests import base as tests_base
from neutron.tests.common import helpers
from neutron.tests.common import machine_fixtures
from neutron.tests.common import net_helpers
from neutron.tests.fullstack.resources import client as client_resource
from neutron.tests.unit import testlib_api
# This is the directory from which infra fetches log files for fullstack tests
DEFAULT_LOG_DIR = os.path.join(helpers.get_test_log_path(),
'dsvm-fullstack-logs')
ROOTDIR = os.path.dirname(__file__)
LOG = logging.getLogger(__name__)
class BaseFullStackTestCase(testlib_api.MySQLTestCaseMixin,
testlib_api.SqlTestCase):
"""Base test class for full-stack tests."""
BUILD_WITH_MIGRATIONS = True
def setUp(self, environment):
super(BaseFullStackTestCase, self).setUp()
tests_base.setup_test_logging(
cfg.CONF, DEFAULT_LOG_DIR, '%s.txt' % self.get_name())
# NOTE(zzzeek): the opportunistic DB fixtures have built for
# us a per-test (or per-process) database. Set the URL of this
# database in CONF as the full stack tests need to actually run a
# neutron server against this database.
_orig_db_url = cfg.CONF.database.connection
cfg.CONF.set_override(
'connection', str(self.engine.url), group='database')
self.addCleanup(
cfg.CONF.set_override,
"connection", _orig_db_url, group="database"
)
# NOTE(ihrachys): seed should be reset before environment fixture below
# since the latter starts services that may rely on generated port
# numbers
tools.reset_random_seed()
# configure test runner to use rootwrap
self.setup_rootwrap()
config.setup_privsep()
self.environment = environment
self.environment.test_name = self.get_name()
self.useFixture(self.environment)
self.client = self.environment.neutron_server.client
self.safe_client = self.useFixture(
client_resource.ClientFixture(self.client))
def get_name(self):
class_name, test_name = self.id().split(".")[-2:]
return "%s.%s" % (class_name, test_name)
def _wait_until_agent_up(self, agent_id):
def _agent_up():
agent = self.client.show_agent(agent_id)['agent']
return agent.get('alive')
common_utils.wait_until_true(_agent_up)
def _wait_until_agent_down(self, agent_id):
def _agent_down():
agent = self.client.show_agent(agent_id)['agent']
return not agent.get('alive')
common_utils.wait_until_true(_agent_down)
def _assert_ping_during_agents_restart(
self, agents, src_namespace, ips, restart_timeout=10,
ping_timeout=1, count=10):
with net_helpers.async_ping(
src_namespace, ips, timeout=ping_timeout,
count=count) as done:
LOG.debug("Restarting agents")
executor = futures.ThreadPoolExecutor(max_workers=len(agents))
restarts = [agent.restart(executor=executor)
for agent in agents]
futures.wait(restarts, timeout=restart_timeout)
self.assertTrue(all([r.done() for r in restarts]))
LOG.debug("Restarting agents - done")
# It is necessary to give agents time to initialize
# because some crucial steps (e.g. setting up bridge flows)
# happen only after RPC is established
agent_names = ', '.join({agent.process_fixture.process_name
for agent in agents})
common_utils.wait_until_true(
done,
timeout=count * (ping_timeout + 1),
exception=RuntimeError("Could not ping the other VM, "
"re-starting %s leads to network "
"disruption" % agent_names))
def _find_available_ips(self, network, subnet, num):
ports = self.safe_client.list_ports(network_id=network['id'])
used_ips = netaddr.IPSet(
[netaddr.IPAddress(ip['ip_address'])
for port in ports for ip in port['fixed_ips']])
used_ips.add(netaddr.IPAddress(subnet['gateway_ip']))
# Note(lajoskatona): Suppose that we have 1 allocation pool for the
# subnet, that should be quite good assumption for testing.
valid_ip_pool = subnet['allocation_pools'][0]
valid_ips = netaddr.IPSet(netaddr.IPRange(
valid_ip_pool['start'],
valid_ip_pool['end'])
)
valid_ips = valid_ips.difference(used_ips)
if valid_ips.size < num:
self.fail("Cannot find enough free IP addresses.")
initial = random.randint(0, min(valid_ips.size - num, 1000))
available_ips = itertools.islice(valid_ips, initial, initial + num)
return [str(available_ip) for available_ip in available_ips]
def _create_external_vm(self, network, subnet):
vm = self.useFixture(
machine_fixtures.FakeMachine(
self.environment.central_bridge,
common_utils.ip_to_cidr(subnet['gateway_ip'], 24)))
# NOTE(slaweq): as ext_net is 'vlan' network type external_vm needs to
# send packets with proper vlan also
vm.bridge.set_db_attribute(
"Port", vm.port.name,
"tag", network.get("provider:segmentation_id"))
return vm
def assert_namespace_exists(self, ns_name):
common_utils.wait_until_true(
lambda: ip_lib.network_namespace_exists(ns_name,
try_is_ready=True))