Neutron integration with OVN
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# Copyright 2016 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 datetime import datetime
import os
import shutil
import time
import fixtures
import mock
from neutron.conf.plugins.ml2 import config
from neutron.plugins.ml2.drivers import type_geneve # noqa
from neutron.tests.unit.plugins.ml2 import test_plugin
from neutron_lib import fixture
from neutron_lib.plugins import constants
from neutron_lib.plugins import directory
from oslo_concurrency import lockutils
from oslo_config import cfg
from oslo_db import exception as os_db_exc
from oslo_db.sqlalchemy import provision
from oslo_log import log
from oslo_utils import uuidutils
from ovsdbapp.backend.ovs_idl import connection
# Load all the models to register them into SQLAlchemy metadata before using
# the SqlFixture
from networking_ovn.db import models # noqa
from networking_ovn.ovsdb import impl_idl_ovn
from networking_ovn.ovsdb import ovsdb_monitor
from networking_ovn.ovsdb import worker
from networking_ovn.tests import base
from networking_ovn.tests.functional.resources import process
LOG = log.getLogger(__name__)
# This is the directory from which infra fetches log files for functional tests
DEFAULT_LOG_DIR = os.path.join(os.environ.get('OS_LOG_PATH', '/tmp'),
'dsvm-functional-logs')
SQL_FIXTURE_LOCK = 'sql_fixture_lock'
class ConnectionFixture(fixtures.Fixture):
def __init__(self, idl=None, constr=None, schema=None, timeout=60):
self.idl = idl or ovsdb_monitor.BaseOvnIdl.from_server(
constr, schema)
self.connection = connection.Connection(
idl=self.idl, timeout=timeout)
def _setUp(self):
self.addCleanup(self.stop)
self.connection.start()
def stop(self):
self.connection.stop()
class OVNSqlFixture(fixture.StaticSqlFixture):
@classmethod
@lockutils.synchronized(SQL_FIXTURE_LOCK)
def _init_resources(cls):
cls.schema_resource = provision.SchemaResource(
provision.DatabaseResource("sqlite"),
cls._generate_schema, teardown=False)
dependency_resources = {}
for name, resource in cls.schema_resource.resources:
dependency_resources[name] = resource.getResource()
cls.schema_resource.make(dependency_resources)
cls.engine = dependency_resources['database'].engine
def _delete_from_schema(self, engine):
try:
super(OVNSqlFixture, self)._delete_from_schema(engine)
except os_db_exc.DBNonExistentTable:
pass
class TestOVNFunctionalBase(test_plugin.Ml2PluginV2TestCase):
# Please see networking_ovn/tests/contrib/gate_hook.sh.
# It installs openvswitch in the '/usr/local' path and the ovn-nb schema
# file will be present in this path.
OVS_INSTALL_SHARE_PATH = '/usr/local/share/openvswitch'
_mechanism_drivers = ['logger', 'ovn']
_extension_drivers = ['port_security']
_counter = 0
l3_plugin = 'networking_ovn.l3.l3_ovn.OVNL3RouterPlugin'
def setUp(self, maintenance_worker=False):
config.cfg.CONF.set_override('extension_drivers',
self._extension_drivers,
group='ml2')
config.cfg.CONF.set_override('tenant_network_types',
['geneve'],
group='ml2')
config.cfg.CONF.set_override('vni_ranges',
['1:65536'],
group='ml2_type_geneve')
config.cfg.CONF.set_override('dns_servers',
['10.10.10.10'],
group='ovn')
super(TestOVNFunctionalBase, self).setUp()
self.test_log_dir = os.path.join(DEFAULT_LOG_DIR, self.id())
base.setup_test_logging(
cfg.CONF, self.test_log_dir, "testrun.txt")
mm = directory.get_plugin().mechanism_manager
self.mech_driver = mm.mech_drivers['ovn'].obj
self.l3_plugin = directory.get_plugin(constants.L3)
self.ovsdb_server_mgr = None
self.ovn_northd_mgr = None
self.maintenance_worker = maintenance_worker
self.temp_dir = self.useFixture(fixtures.TempDir()).path
self._start_ovsdb_server_and_idls()
self._start_ovn_northd()
# FIXME(lucasagomes): Workaround for
# https://bugs.launchpad.net/networking-ovn/+bug/1808146. We should
# investigate and properly fix the problem. This method is just a
# workaround to alleviate the gate for now and should not be considered
# a proper fix.
def _setup_database_fixtures(self):
fixture = OVNSqlFixture()
self.useFixture(fixture)
self.engine = fixture.engine
def get_additional_service_plugins(self):
p = super(TestOVNFunctionalBase, self).get_additional_service_plugins()
p.update({'revision_plugin_name': 'revisions'})
return p
@property
def _ovsdb_protocol(self):
return self.get_ovsdb_server_protocol()
def get_ovsdb_server_protocol(self):
return 'unix'
def _start_ovn_northd(self):
if not self.ovsdb_server_mgr:
return
ovn_nb_db = self.ovsdb_server_mgr.get_ovsdb_connection_path('nb')
ovn_sb_db = self.ovsdb_server_mgr.get_ovsdb_connection_path('sb')
self.ovn_northd_mgr = self.useFixture(
process.OvnNorthd(self.temp_dir,
ovn_nb_db, ovn_sb_db,
protocol=self._ovsdb_protocol))
def _start_ovsdb_server_and_idls(self):
# Start 2 ovsdb-servers one each for OVN NB DB and OVN SB DB
# ovsdb-server with OVN SB DB can be used to test the chassis up/down
# events.
mgr = self.ovsdb_server_mgr = self.useFixture(
process.OvsdbServer(self.temp_dir, self.OVS_INSTALL_SHARE_PATH,
ovn_nb_db=True, ovn_sb_db=True,
protocol=self._ovsdb_protocol))
set_cfg = cfg.CONF.set_override
set_cfg('ovn_nb_connection',
self.ovsdb_server_mgr.get_ovsdb_connection_path(), 'ovn')
set_cfg('ovn_sb_connection',
self.ovsdb_server_mgr.get_ovsdb_connection_path(
db_type='sb'), 'ovn')
set_cfg('ovn_nb_private_key', self.ovsdb_server_mgr.private_key, 'ovn')
set_cfg('ovn_nb_certificate', self.ovsdb_server_mgr.certificate, 'ovn')
set_cfg('ovn_nb_ca_cert', self.ovsdb_server_mgr.ca_cert, 'ovn')
set_cfg('ovn_sb_private_key', self.ovsdb_server_mgr.private_key, 'ovn')
set_cfg('ovn_sb_certificate', self.ovsdb_server_mgr.certificate, 'ovn')
set_cfg('ovn_sb_ca_cert', self.ovsdb_server_mgr.ca_cert, 'ovn')
num_attempts = 0
# 5 seconds should be more than enough for the transaction to complete
# for the test cases.
# This also fixes the bug #1607639.
cfg.CONF.set_override(
'ovsdb_connection_timeout', 5,
'ovn')
# Created monitor IDL connection to the OVN NB DB.
# This monitor IDL connection can be used to
# - Verify that the ML2 OVN driver has written to the OVN NB DB
# as expected.
# - Create and delete resources in OVN NB DB outside of the
# ML2 OVN driver scope to test scenarios like ovn_nb_sync.
while num_attempts < 3:
try:
con = self.useFixture(ConnectionFixture(
constr=mgr.get_ovsdb_connection_path(),
schema='OVN_Northbound')).connection
self.nb_api = impl_idl_ovn.OvsdbNbOvnIdl(con)
break
except Exception:
LOG.exception("Error connecting to the OVN_Northbound DB")
num_attempts += 1
time.sleep(1)
num_attempts = 0
# Create monitor IDL connection to the OVN SB DB.
# This monitor IDL connection can be used to
# - Create chassis rows
# - Update chassis columns etc.
while num_attempts < 3:
try:
con = self.useFixture(ConnectionFixture(
constr=mgr.get_ovsdb_connection_path('sb'),
schema='OVN_Southbound')).connection
self.sb_api = impl_idl_ovn.OvsdbSbOvnIdl(con)
break
except Exception:
LOG.exception("Error connecting to the OVN_Southbound DB")
num_attempts += 1
time.sleep(1)
class TriggerCls(mock.MagicMock):
def trigger(self):
pass
trigger_cls = TriggerCls()
if self.maintenance_worker:
trigger_cls.trigger.__self__.__class__ = worker.MaintenanceWorker
cfg.CONF.set_override('neutron_sync_mode', 'off', 'ovn')
self.addCleanup(self._collect_processes_logs)
self.addCleanup(self.stop)
# mech_driver.post_fork_initialize creates the IDL connections
self.mech_driver.post_fork_initialize(
mock.ANY, mock.ANY, trigger_cls.trigger)
def _collect_processes_logs(self):
for database in ("nb", "sb"):
for file_suffix in ("log", "db"):
src_filename = "ovn_%(db)s.%(suffix)s" % {
'db': database,
'suffix': file_suffix
}
dst_filename = "ovn_%(db)s-%(timestamp)s.%(suffix)s" % {
'db': database,
'suffix': file_suffix,
'timestamp': datetime.now().strftime('%y-%m-%d_%H-%M-%S'),
}
filepath = os.path.join(self.temp_dir, src_filename)
shutil.copyfile(
filepath, os.path.join(self.test_log_dir, dst_filename))
def stop(self):
if self.maintenance_worker:
self.mech_driver.nb_synchronizer.stop()
self.mech_driver.sb_synchronizer.stop()
self.mech_driver._nb_ovn.ovsdb_connection.stop()
self.mech_driver._sb_ovn.ovsdb_connection.stop()
def restart(self):
self.stop()
if self.ovsdb_server_mgr:
self.ovsdb_server_mgr.stop()
if self.ovn_northd_mgr:
self.ovn_northd_mgr.stop()
self.ovsdb_server_mgr.delete_dbs()
self._start_ovsdb_server_and_idls()
self._start_ovn_northd()
def add_fake_chassis(self, host, physical_nets=None, external_ids=None,
name=None):
physical_nets = physical_nets or []
external_ids = external_ids or {}
bridge_mapping = ",".join(["%s:br-provider%s" % (phys_net, i)
for i, phys_net in enumerate(physical_nets)])
if name is None:
name = uuidutils.generate_uuid()
external_ids['ovn-bridge-mappings'] = bridge_mapping
# We'll be using different IP addresses every time for the Encap of
# the fake chassis as the SB schema doesn't allow to have two entries
# with same (ip,type) pairs as of OVS 2.11. This shouldn't have any
# impact as the tunnels won't get created anyways since ovn-controller
# is not running. Ideally we shouldn't be creating more than 255
# fake chassis but from the SB db point of view, 'ip' column can be
# any string so we could add entries with ip='172.24.4.1000'.
self._counter += 1
self.sb_api.chassis_add(
name, ['geneve'], '172.24.4.%d' % self._counter,
external_ids=external_ids, hostname=host).execute(check_error=True)
return name
def del_fake_chassis(self, chassis, if_exists=True):
self.sb_api.chassis_del(
chassis, if_exists=if_exists).execute(check_error=True)