vmware-nsx/neutron/tests/unit/ml2/drivers/test_cisco_mech.py
Rich Curran def3e98df2 ML2 Cisco Nexus mech driver portbinding support
This commit adds portbinding extension support to
the cisco nexus mechanism driver.

Fixes bug: 1220878

Change-Id: I72003961b46190b82681b471f4f9cb5b11d3d068
2013-09-28 12:54:53 -04:00

554 lines
22 KiB
Python

# Copyright (c) 2012 OpenStack Foundation.
#
# 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.
import contextlib
import mock
import webob.exc as wexc
from neutron.api.v2 import base
from neutron.common import constants as n_const
from neutron import context
from neutron.extensions import portbindings
from neutron.manager import NeutronManager
from neutron.openstack.common import log as logging
from neutron.plugins.ml2 import config as ml2_config
from neutron.plugins.ml2.drivers.cisco import config as cisco_config
from neutron.plugins.ml2.drivers.cisco import exceptions as c_exc
from neutron.plugins.ml2.drivers.cisco import mech_cisco_nexus
from neutron.plugins.ml2.drivers.cisco import nexus_db_v2
from neutron.plugins.ml2.drivers.cisco import nexus_network_driver
from neutron.plugins.ml2.drivers import type_vlan as vlan_config
from neutron.tests.unit import test_db_plugin
LOG = logging.getLogger(__name__)
ML2_PLUGIN = 'neutron.plugins.ml2.plugin.Ml2Plugin'
PHYS_NET = 'physnet1'
COMP_HOST_NAME = 'testhost'
VLAN_START = 1000
VLAN_END = 1100
NEXUS_IP_ADDR = '1.1.1.1'
CIDR_1 = '10.0.0.0/24'
CIDR_2 = '10.0.1.0/24'
DEVICE_ID_1 = '11111111-1111-1111-1111-111111111111'
DEVICE_ID_2 = '22222222-2222-2222-2222-222222222222'
class CiscoML2MechanismTestCase(test_db_plugin.NeutronDbPluginV2TestCase):
def setUp(self):
"""Configure for end-to-end neutron testing using a mock ncclient.
This setup includes:
- Configure the ML2 plugin to use VLANs in the range of 1000-1100.
- Configure the Cisco mechanism driver to use an imaginary switch
at NEXUS_IP_ADDR.
- Create a mock NETCONF client (ncclient) for the Cisco mechanism
driver
"""
self.addCleanup(mock.patch.stopall)
# Configure the ML2 mechanism drivers and network types
ml2_opts = {
'mechanism_drivers': ['cisco_nexus'],
'tenant_network_types': ['vlan'],
}
for opt, val in ml2_opts.items():
ml2_config.cfg.CONF.set_override(opt, val, 'ml2')
self.addCleanup(ml2_config.cfg.CONF.reset)
# Configure the ML2 VLAN parameters
phys_vrange = ':'.join([PHYS_NET, str(VLAN_START), str(VLAN_END)])
vlan_config.cfg.CONF.set_override('network_vlan_ranges',
[phys_vrange],
'ml2_type_vlan')
self.addCleanup(vlan_config.cfg.CONF.reset)
# Configure the Cisco Nexus mechanism driver
nexus_config = {
(NEXUS_IP_ADDR, 'username'): 'admin',
(NEXUS_IP_ADDR, 'password'): 'mySecretPassword',
(NEXUS_IP_ADDR, 'ssh_port'): 22,
(NEXUS_IP_ADDR, COMP_HOST_NAME): '1/1'}
nexus_patch = mock.patch.dict(
cisco_config.ML2MechCiscoConfig.nexus_dict,
nexus_config)
nexus_patch.start()
self.addCleanup(nexus_patch.stop)
# The NETCONF client module is not included in the DevStack
# distribution, so mock this module for unit testing.
self.mock_ncclient = mock.Mock()
mock.patch.object(nexus_network_driver.CiscoNexusDriver,
'_import_ncclient',
return_value=self.mock_ncclient).start()
# Mock port values for 'status' and 'binding:segmenation_id'
mock_status = mock.patch.object(
mech_cisco_nexus.CiscoNexusMechanismDriver,
'_is_status_active').start()
mock_status.return_value = n_const.PORT_STATUS_ACTIVE
def _mock_get_vlanid(context):
port = context.current
if port['device_id'] == DEVICE_ID_1:
return VLAN_START
else:
return VLAN_START + 1
mock_vlanid = mock.patch.object(
mech_cisco_nexus.CiscoNexusMechanismDriver,
'_get_vlanid').start()
mock_vlanid.side_effect = _mock_get_vlanid
super(CiscoML2MechanismTestCase, self).setUp(ML2_PLUGIN)
self.port_create_status = 'DOWN'
@contextlib.contextmanager
def _patch_ncclient(self, attr, value):
"""Configure an attribute on the mock ncclient module.
This method can be used to inject errors by setting a side effect
or a return value for an ncclient method.
:param attr: ncclient attribute (typically method) to be configured.
:param value: Value to be configured on the attribute.
"""
# Configure attribute.
config = {attr: value}
self.mock_ncclient.configure_mock(**config)
# Continue testing
yield
# Unconfigure attribute
config = {attr: None}
self.mock_ncclient.configure_mock(**config)
def _is_in_last_nexus_cfg(self, words):
"""Confirm last config sent to Nexus contains specified keywords."""
last_cfg = (self.mock_ncclient.connect.return_value.
edit_config.mock_calls[-1][2]['config'])
return all(word in last_cfg for word in words)
class TestCiscoBasicGet(CiscoML2MechanismTestCase,
test_db_plugin.TestBasicGet):
pass
class TestCiscoV2HTTPResponse(CiscoML2MechanismTestCase,
test_db_plugin.TestV2HTTPResponse):
pass
class TestCiscoPortsV2(CiscoML2MechanismTestCase,
test_db_plugin.TestPortsV2):
@contextlib.contextmanager
def _create_resources(self, name='myname', cidr=CIDR_1,
device_id=DEVICE_ID_1,
host_id=COMP_HOST_NAME,
expected_exception=None):
"""Create network, subnet, and port resources for test cases.
Create a network, subnet, port and then update port, yield the result,
then delete the port, subnet, and network.
:param name: Name of network to be created.
:param cidr: cidr address of subnetwork to be created.
:param device_id: Device ID to use for port to be created/updated.
:param host_id: Host ID to use for port create/update.
:param expected_exception: Expected HTTP code.
"""
ctx = context.get_admin_context()
with self.network(name=name) as network:
with self.subnet(network=network, cidr=cidr) as subnet:
net_id = subnet['subnet']['network_id']
args = (portbindings.HOST_ID, 'device_id', 'device_owner',
'admin_state_up')
port_dict = {portbindings.HOST_ID: host_id,
'device_id': device_id,
'device_owner': 'compute:none',
'admin_state_up': True}
res = self._create_port(self.fmt, net_id, arg_list=args,
context=ctx, **port_dict)
port = self.deserialize(self.fmt, res)
expected_exception = self._expectedHTTP(expected_exception)
data = {'port': port_dict}
self._update('ports', port['port']['id'], data,
expected_code=expected_exception,
neutron_context=ctx)
try:
yield port
finally:
self._delete('ports', port['port']['id'])
def _expectedHTTP(self, exc):
"""Map a Cisco exception to the HTTP status equivalent.
:param exc: Expected Cisco exception
"""
if exc == None:
expected_http = wexc.HTTPOk.code
elif exc in base.FAULT_MAP:
expected_http = base.FAULT_MAP[exc].code
else:
expected_http = wexc.HTTPInternalServerError.code
return expected_http
def test_create_ports_bulk_emulated_plugin_failure(self):
real_has_attr = hasattr
#ensures the API chooses the emulation code path
def fakehasattr(item, attr):
if attr.endswith('__native_bulk_support'):
return False
return real_has_attr(item, attr)
with mock.patch('__builtin__.hasattr',
new=fakehasattr):
plugin_obj = NeutronManager.get_plugin()
orig = plugin_obj.create_port
with mock.patch.object(plugin_obj,
'create_port') as patched_plugin:
def side_effect(*args, **kwargs):
return self._do_side_effect(patched_plugin, orig,
*args, **kwargs)
patched_plugin.side_effect = side_effect
with self.network() as net:
res = self._create_port_bulk(self.fmt, 2,
net['network']['id'],
'test',
True)
# Expect an internal server error as we injected a fault
self._validate_behavior_on_bulk_failure(
res,
'ports',
wexc.HTTPInternalServerError.code)
def test_create_ports_bulk_native(self):
if self._skip_native_bulk:
self.skipTest("Plugin does not support native bulk port create")
def test_create_ports_bulk_emulated(self):
if self._skip_native_bulk:
self.skipTest("Plugin does not support native bulk port create")
def test_create_ports_bulk_native_plugin_failure(self):
if self._skip_native_bulk:
self.skipTest("Plugin does not support native bulk port create")
ctx = context.get_admin_context()
with self.network() as net:
plugin_obj = NeutronManager.get_plugin()
orig = plugin_obj.create_port
with mock.patch.object(plugin_obj,
'create_port') as patched_plugin:
def side_effect(*args, **kwargs):
return self._do_side_effect(patched_plugin, orig,
*args, **kwargs)
patched_plugin.side_effect = side_effect
res = self._create_port_bulk(self.fmt, 2, net['network']['id'],
'test', True, context=ctx)
# We expect an internal server error as we injected a fault
self._validate_behavior_on_bulk_failure(
res,
'ports',
wexc.HTTPInternalServerError.code)
def test_nexus_enable_vlan_cmd(self):
"""Verify the syntax of the command to enable a vlan on an intf.
Confirm that for the first VLAN configured on a Nexus interface,
the command string sent to the switch does not contain the
keyword 'add'.
Confirm that for the second VLAN configured on a Nexus interface,
the command staring sent to the switch contains the keyword 'add'.
"""
with self._create_resources(name='net1', cidr=CIDR_1):
self.assertTrue(self._is_in_last_nexus_cfg(['allowed', 'vlan']))
self.assertFalse(self._is_in_last_nexus_cfg(['add']))
with self._create_resources(name='net2', device_id=DEVICE_ID_2,
cidr=CIDR_2):
self.assertTrue(
self._is_in_last_nexus_cfg(['allowed', 'vlan', 'add']))
def test_nexus_connect_fail(self):
"""Test failure to connect to a Nexus switch.
While creating a network, subnet, and port, simulate a connection
failure to a nexus switch. Confirm that the expected HTTP code
is returned for the create port operation.
"""
with self._patch_ncclient('connect.side_effect',
AttributeError):
self._create_resources(expected_exception=c_exc.NexusConnectFailed)
def test_nexus_config_fail(self):
"""Test a Nexus switch configuration failure.
While creating a network, subnet, and port, simulate a nexus
switch configuration error. Confirm that the expected HTTP code
is returned for the create port operation.
"""
with self._patch_ncclient(
'connect.return_value.edit_config.side_effect',
AttributeError):
self._create_resources(expected_exception=c_exc.NexusConfigFailed)
def test_nexus_extended_vlan_range_failure(self):
"""Test that extended VLAN range config errors are ignored.
Some versions of Nexus switch do not allow state changes for
the extended VLAN range (1006-4094), but these errors can be
ignored (default values are appropriate). Test that such errors
are ignored by the Nexus plugin.
"""
def mock_edit_config_a(target, config):
if all(word in config for word in ['state', 'active']):
raise Exception("Can't modify state for extended")
with self._patch_ncclient(
'connect.return_value.edit_config.side_effect',
mock_edit_config_a):
self._create_resources(name='myname')
def mock_edit_config_b(target, config):
if all(word in config for word in ['no', 'shutdown']):
raise Exception("Command is only allowed on VLAN")
with self._patch_ncclient(
'connect.return_value.edit_config.side_effect',
mock_edit_config_b):
self._create_resources(name='myname')
def test_nexus_vlan_config_rollback(self):
"""Test rollback following Nexus VLAN state config failure.
Test that the Cisco Nexus plugin correctly deletes the VLAN
on the Nexus switch when the 'state active' command fails (for
a reason other than state configuration change is rejected
for the extended VLAN range).
"""
def mock_edit_config(target, config):
if all(word in config for word in ['state', 'active']):
raise ValueError
with self._patch_ncclient(
'connect.return_value.edit_config.side_effect',
mock_edit_config):
with self._create_resources(
name='myname',
expected_exception=c_exc.NexusConfigFailed):
# Confirm that the last configuration sent to the Nexus
# switch was deletion of the VLAN.
self.assertTrue(self._is_in_last_nexus_cfg(['<no>', '<vlan>']))
def test_nexus_host_not_configured(self):
"""Test handling of a NexusComputeHostNotConfigured exception.
Test the Cisco NexusComputeHostNotConfigured exception by using
a fictitious host name during port creation.
"""
self._create_resources(
host_id='fake_host',
expected_exception=c_exc.NexusComputeHostNotConfigured)
def test_nexus_bind_fail_rollback(self):
"""Test for proper rollback following add Nexus DB binding failure.
Test that the Cisco Nexus plugin correctly rolls back the vlan
configuration on the Nexus switch when add_nexusport_binding fails
within the plugin's create_port() method.
"""
with mock.patch.object(nexus_db_v2,
'add_nexusport_binding',
side_effect=KeyError):
with self._create_resources(expected_exception=KeyError):
# Confirm that the last configuration sent to the Nexus
# switch was a removal of vlan from the test interface.
self.assertTrue(
self._is_in_last_nexus_cfg(['<vlan>', '<remove>'])
)
def test_nexus_delete_port_rollback(self):
"""Test for proper rollback for nexus plugin delete port failure.
Test for rollback (i.e. restoration) of a VLAN entry in the
nexus database whenever the nexus plugin fails to reconfigure the
nexus switch during a delete_port operation.
"""
with self._create_resources() as port:
# Check that there is only one binding in the nexus database
# for this VLAN/nexus switch.
start_rows = nexus_db_v2.get_nexusvlan_binding(VLAN_START,
NEXUS_IP_ADDR)
self.assertEqual(len(start_rows), 1)
# Simulate a Nexus switch configuration error during
# port deletion.
with self._patch_ncclient(
'connect.return_value.edit_config.side_effect',
AttributeError):
self._delete('ports', port['port']['id'],
wexc.HTTPInternalServerError.code)
# Confirm that the binding has been restored (rolled back).
end_rows = nexus_db_v2.get_nexusvlan_binding(VLAN_START,
NEXUS_IP_ADDR)
self.assertEqual(start_rows, end_rows)
class TestCiscoNetworksV2(CiscoML2MechanismTestCase,
test_db_plugin.TestNetworksV2):
def test_create_networks_bulk_emulated_plugin_failure(self):
real_has_attr = hasattr
def fakehasattr(item, attr):
if attr.endswith('__native_bulk_support'):
return False
return real_has_attr(item, attr)
plugin_obj = NeutronManager.get_plugin()
orig = plugin_obj.create_network
#ensures the API choose the emulation code path
with mock.patch('__builtin__.hasattr',
new=fakehasattr):
with mock.patch.object(plugin_obj,
'create_network') as patched_plugin:
def side_effect(*args, **kwargs):
return self._do_side_effect(patched_plugin, orig,
*args, **kwargs)
patched_plugin.side_effect = side_effect
res = self._create_network_bulk(self.fmt, 2, 'test', True)
LOG.debug("response is %s" % res)
# We expect an internal server error as we injected a fault
self._validate_behavior_on_bulk_failure(
res,
'networks',
wexc.HTTPInternalServerError.code)
def test_create_networks_bulk_native_plugin_failure(self):
if self._skip_native_bulk:
self.skipTest("Plugin does not support native bulk network create")
plugin_obj = NeutronManager.get_plugin()
orig = plugin_obj.create_network
with mock.patch.object(plugin_obj,
'create_network') as patched_plugin:
def side_effect(*args, **kwargs):
return self._do_side_effect(patched_plugin, orig,
*args, **kwargs)
patched_plugin.side_effect = side_effect
res = self._create_network_bulk(self.fmt, 2, 'test', True)
# We expect an internal server error as we injected a fault
self._validate_behavior_on_bulk_failure(
res,
'networks',
wexc.HTTPInternalServerError.code)
class TestCiscoSubnetsV2(CiscoML2MechanismTestCase,
test_db_plugin.TestSubnetsV2):
def test_create_subnets_bulk_emulated_plugin_failure(self):
real_has_attr = hasattr
#ensures the API choose the emulation code path
def fakehasattr(item, attr):
if attr.endswith('__native_bulk_support'):
return False
return real_has_attr(item, attr)
with mock.patch('__builtin__.hasattr',
new=fakehasattr):
plugin_obj = NeutronManager.get_plugin()
orig = plugin_obj.create_subnet
with mock.patch.object(plugin_obj,
'create_subnet') as patched_plugin:
def side_effect(*args, **kwargs):
self._do_side_effect(patched_plugin, orig,
*args, **kwargs)
patched_plugin.side_effect = side_effect
with self.network() as net:
res = self._create_subnet_bulk(self.fmt, 2,
net['network']['id'],
'test')
# We expect an internal server error as we injected a fault
self._validate_behavior_on_bulk_failure(
res,
'subnets',
wexc.HTTPInternalServerError.code)
def test_create_subnets_bulk_native_plugin_failure(self):
if self._skip_native_bulk:
self.skipTest("Plugin does not support native bulk subnet create")
plugin_obj = NeutronManager.get_plugin()
orig = plugin_obj.create_subnet
with mock.patch.object(plugin_obj,
'create_subnet') as patched_plugin:
def side_effect(*args, **kwargs):
return self._do_side_effect(patched_plugin, orig,
*args, **kwargs)
patched_plugin.side_effect = side_effect
with self.network() as net:
res = self._create_subnet_bulk(self.fmt, 2,
net['network']['id'],
'test')
# We expect an internal server error as we injected a fault
self._validate_behavior_on_bulk_failure(
res,
'subnets',
wexc.HTTPInternalServerError.code)
class TestCiscoPortsV2XML(TestCiscoPortsV2):
fmt = 'xml'
class TestCiscoNetworksV2XML(TestCiscoNetworksV2):
fmt = 'xml'
class TestCiscoSubnetsV2XML(TestCiscoSubnetsV2):
fmt = 'xml'