openstack
/
neutron
Code Issues Proposed changes

Improve dhcp agent structure to support multiple dhcp models 

This patch introduces some minor refactoring of the dhcp
code so that it is easy to support both an in-node/same
process dhcp provisioning model (e.g. with dnsmasq) and
proxy model, where DHCP is provided by an external node.

Higher separation of concerns is also achieved by doing
better data encapsulation.

Implements blueprint dhcp-flexi-model

Change-Id: Icbd215e9682ecaebb6a4300423f3564e8e677566
This commit is contained in:
armando-migliaccio 2013-08-01 17:13:26 -07:00
parent 1c2e111a0b
commit 192d7f35a7
8 changed files with 538 additions and 572 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

313
neutron/agent/dhcp_agent.py
View File

@ -16,8 +16,6 @@
# under the License.
import os
import socket
import uuid
import eventlet
import netaddr
@ -27,10 +25,8 @@ from neutron.agent.common import config
from neutron.agent.linux import dhcp
from neutron.agent.linux import external_process
from neutron.agent.linux import interface
from neutron.agent.linux import ip_lib
from neutron.agent import rpc as agent_rpc
from neutron.common import constants
from neutron.common import exceptions
from neutron.common import legacy
from neutron.common import topics
from neutron.common import utils
@ -44,10 +40,6 @@ from neutron.openstack.common import service
from neutron import service as neutron_service
LOG = logging.getLogger(__name__)
NS_PREFIX = 'qdhcp-'
METADATA_DEFAULT_PREFIX = 16
METADATA_DEFAULT_IP = '169.254.169.254/%d' % METADATA_DEFAULT_PREFIX
METADATA_PORT = 80
class DhcpAgent(manager.Manager):
@ -81,8 +73,8 @@ class DhcpAgent(manager.Manager):
self.root_helper = config.get_root_helper(self.conf)
self.dhcp_driver_cls = importutils.import_class(self.conf.dhcp_driver)
ctx = context.get_admin_context_without_session()
self.plugin_rpc = DhcpPluginApi(topics.PLUGIN, ctx)
self.device_manager = DeviceManager(self.conf, self.plugin_rpc)
self.plugin_rpc = DhcpPluginApi(topics.PLUGIN,
ctx, self.conf.use_namespaces)
# create dhcp dir to store dhcp info
dhcp_dir = os.path.dirname("/%s/dhcp/" % self.conf.state_path)
if not os.path.isdir(dhcp_dir):
@ -92,15 +84,16 @@ class DhcpAgent(manager.Manager):
def _populate_networks_cache(self):
"""Populate the networks cache when the DHCP-agent starts."""
try:
existing_networks = self.dhcp_driver_cls.existing_dhcp_networks(
self.conf,
self.root_helper
)
for net_id in existing_networks:
net = DictModel({"id": net_id, "subnets": [], "ports": []})
net = dhcp.NetModel(self.conf.use_namespaces,
{"id": net_id,
"subnets": [],
"ports": []})
self.cache.put(net)
except NotImplementedError:
# just go ahead with an empty networks cache
@ -119,10 +112,6 @@ class DhcpAgent(manager.Manager):
self.sync_state()
self.periodic_resync()
def _ns_name(self, network):
if self.conf.use_namespaces:
return NS_PREFIX + network.id
def call_driver(self, action, network, **action_kwargs):
"""Invoke an action on a DHCP driver instance."""
try:
@ -131,9 +120,9 @@ class DhcpAgent(manager.Manager):
driver = self.dhcp_driver_cls(self.conf,
network,
self.root_helper,
self.device_manager,
self._ns_name(network),
self.dhcp_version)
self.dhcp_version,
self.plugin_rpc)
getattr(driver, action)(**action_kwargs)
return True
@ -238,9 +227,6 @@ class DhcpAgent(manager.Manager):
else:
self.disable_dhcp_helper(network.id)
if new_cidrs:
self.device_manager.update(network)
def release_lease_for_removed_ips(self, port, network):
"""Releases the dhcp lease for ips removed from a port."""
prev_port = self.cache.get_port_by_id(port.id)
@ -297,7 +283,7 @@ class DhcpAgent(manager.Manager):
@utils.synchronized('dhcp-agent')
def port_update_end(self, context, payload):
"""Handle the port.update.end notification event."""
port = DictModel(payload['port'])
port = dhcp.DictModel(payload['port'])
network = self.cache.get_network_by_id(port.network_id)
if network:
self.release_lease_for_removed_ips(port, network)
@ -328,7 +314,7 @@ class DhcpAgent(manager.Manager):
# or all the networks connected via a router
# to the one passed as a parameter
neutron_lookup_param = '--network_id=%s' % network.id
meta_cidr = netaddr.IPNetwork(METADATA_DEFAULT_IP)
meta_cidr = netaddr.IPNetwork(dhcp.METADATA_DEFAULT_CIDR)
has_metadata_subnet = any(netaddr.IPNetwork(s.cidr) in meta_cidr
for s in network.subnets)
if (self.conf.enable_metadata_network and has_metadata_subnet):
@ -355,7 +341,7 @@ class DhcpAgent(manager.Manager):
'--metadata_proxy_socket=%s' % metadata_proxy_socket,
neutron_lookup_param,
'--state_path=%s' % self.conf.state_path,
'--metadata_port=%d' % METADATA_PORT]
'--metadata_port=%d' % dhcp.METADATA_PORT]
proxy_cmd.extend(config.get_log_args(
cfg.CONF, 'neutron-ns-metadata-proxy-%s.log' % network.id))
return proxy_cmd
@ -364,7 +350,7 @@ class DhcpAgent(manager.Manager):
self.conf,
network.id,
self.root_helper,
self._ns_name(network))
network.namespace)
pm.enable(callback)
def disable_isolated_metadata_proxy(self, network):
@ -372,7 +358,7 @@ class DhcpAgent(manager.Manager):
self.conf,
network.id,
self.root_helper,
self._ns_name(network))
network.namespace)
pm.disable()
@ -388,11 +374,12 @@ class DhcpPluginApi(proxy.RpcProxy):
BASE_RPC_API_VERSION = '1.1'
def __init__(self, topic, context):
def __init__(self, topic, context, use_namespaces):
super(DhcpPluginApi, self).__init__(
topic=topic, default_version=self.BASE_RPC_API_VERSION)
self.context = context
self.host = cfg.CONF.host
self.use_namespaces = use_namespaces
def get_active_networks_info(self):
"""Make a remote process call to retrieve all network info."""
@ -400,41 +387,42 @@ class DhcpPluginApi(proxy.RpcProxy):
self.make_msg('get_active_networks_info',
host=self.host),
topic=self.topic)
return [DictModel(n) for n in networks]
return [dhcp.NetModel(self.use_namespaces, n) for n in networks]
def get_network_info(self, network_id):
"""Make a remote process call to retrieve network info."""
return DictModel(self.call(self.context,
self.make_msg('get_network_info',
network_id=network_id,
host=self.host),
topic=self.topic))
return dhcp.NetModel(self.use_namespaces,
self.call(self.context,
self.make_msg('get_network_info',
network_id=network_id,
host=self.host),
topic=self.topic))
def get_dhcp_port(self, network_id, device_id):
"""Make a remote process call to get the dhcp port."""
return DictModel(self.call(self.context,
self.make_msg('get_dhcp_port',
network_id=network_id,
device_id=device_id,
host=self.host),
topic=self.topic))
return dhcp.DictModel(self.call(self.context,
self.make_msg('get_dhcp_port',
network_id=network_id,
device_id=device_id,
host=self.host),
topic=self.topic))
def create_dhcp_port(self, port):
"""Make a remote process call to create the dhcp port."""
return DictModel(self.call(self.context,
self.make_msg('create_dhcp_port',
port=port,
host=self.host),
topic=self.topic))
return dhcp.DictModel(self.call(self.context,
self.make_msg('create_dhcp_port',
port=port,
host=self.host),
topic=self.topic))
def update_dhcp_port(self, port_id, port):
"""Make a remote process call to update the dhcp port."""
return DictModel(self.call(self.context,
self.make_msg('update_dhcp_port',
port_id=port_id,
port=port,
host=self.host),
topic=self.topic))
return dhcp.DictModel(self.call(self.context,
self.make_msg('update_dhcp_port',
port_id=port_id,
port=port,
host=self.host),
topic=self.topic))
def release_dhcp_port(self, network_id, device_id):
"""Make a remote process call to release the dhcp port."""
@ -537,226 +525,6 @@ class NetworkCache(object):
'ports': num_ports}
class DeviceManager(object):
OPTS = [
cfg.StrOpt('interface_driver',
help=_("The driver used to manage the virtual interface."))
]
def __init__(self, conf, plugin):
self.conf = conf
self.root_helper = config.get_root_helper(conf)
self.plugin = plugin
if not conf.interface_driver:
raise SystemExit(_('You must specify an interface driver'))
try:
self.driver = importutils.import_object(
conf.interface_driver, conf
)
except Exception:
msg = _("Error importing interface driver "
"'%s'") % conf.interface_driver
raise SystemExit(msg)
def get_interface_name(self, network, port):
"""Return interface(device) name for use by the DHCP process."""
return self.driver.get_device_name(port)
def get_device_id(self, network):
"""Return a unique DHCP device ID for this host on the network."""
# There could be more than one dhcp server per network, so create
# a device id that combines host and network ids
host_uuid = uuid.uuid5(uuid.NAMESPACE_DNS, socket.gethostname())
return 'dhcp%s-%s' % (host_uuid, network.id)
def _get_device(self, network):
"""Return DHCP ip_lib device for this host on the network."""
device_id = self.get_device_id(network)
port = self.plugin.get_dhcp_port(network.id, device_id)
interface_name = self.get_interface_name(network, port)
namespace = NS_PREFIX + network.id
return ip_lib.IPDevice(interface_name,
self.root_helper,
namespace)
def _set_default_route(self, network):
"""Sets the default gateway for this dhcp namespace.
This method is idempotent and will only adjust the route if adjusting
it would change it from what it already is. This makes it safe to call
and avoids unnecessary perturbation of the system.
"""
device = self._get_device(network)
gateway = device.route.get_gateway()
if gateway:
gateway = gateway['gateway']
for subnet in network.subnets:
skip_subnet = (
subnet.ip_version != 4
or not subnet.enable_dhcp
or subnet.gateway_ip is None)
if skip_subnet:
continue
if gateway != subnet.gateway_ip:
m = _('Setting gateway for dhcp netns on net %(n)s to %(ip)s')
LOG.debug(m, {'n': network.id, 'ip': subnet.gateway_ip})
device.route.add_gateway(subnet.gateway_ip)
return
# No subnets on the network have a valid gateway. Clean it up to avoid
# confusion from seeing an invalid gateway here.
if gateway is not None:
msg = _('Removing gateway for dhcp netns on net %s')
LOG.debug(msg, network.id)
device.route.delete_gateway(gateway)
def setup_dhcp_port(self, network):
"""Create/update DHCP port for the host if needed and return port."""
device_id = self.get_device_id(network)
subnets = {}
dhcp_enabled_subnet_ids = []
for subnet in network.subnets:
if subnet.enable_dhcp:
dhcp_enabled_subnet_ids.append(subnet.id)
subnets[subnet.id] = subnet
dhcp_port = None
for port in network.ports:
port_device_id = getattr(port, 'device_id', None)
if port_device_id == device_id:
port_fixed_ips = []
for fixed_ip in port.fixed_ips:
port_fixed_ips.append({'subnet_id': fixed_ip.subnet_id,
'ip_address': fixed_ip.ip_address})
if fixed_ip.subnet_id in dhcp_enabled_subnet_ids:
dhcp_enabled_subnet_ids.remove(fixed_ip.subnet_id)
# If there are dhcp_enabled_subnet_ids here that means that
# we need to add those to the port and call update.
if dhcp_enabled_subnet_ids:
port_fixed_ips.extend(
[dict(subnet_id=s) for s in dhcp_enabled_subnet_ids])
dhcp_port = self.plugin.update_dhcp_port(
port.id, {'port': {'fixed_ips': port_fixed_ips}})
else:
dhcp_port = port
# break since we found port that matches device_id
break
# DHCP port has not yet been created.
if dhcp_port is None:
LOG.debug(_('DHCP port %(device_id)s on network %(network_id)s'
' does not yet exist.'), {'device_id': device_id,
'network_id': network.id})
port_dict = dict(
name='',
admin_state_up=True,
device_id=device_id,
network_id=network.id,
tenant_id=network.tenant_id,
fixed_ips=[dict(subnet_id=s) for s in dhcp_enabled_subnet_ids])
dhcp_port = self.plugin.create_dhcp_port({'port': port_dict})
# Convert subnet_id to subnet dict
fixed_ips = [dict(subnet_id=fixed_ip.subnet_id,
ip_address=fixed_ip.ip_address,
subnet=subnets[fixed_ip.subnet_id])
for fixed_ip in dhcp_port.fixed_ips]
ips = [DictModel(item) if isinstance(item, dict) else item
for item in fixed_ips]
dhcp_port.fixed_ips = ips
return dhcp_port
def setup(self, network, reuse_existing=False):
"""Create and initialize a device for network's DHCP on this host."""
port = self.setup_dhcp_port(network)
interface_name = self.get_interface_name(network, port)
if self.conf.use_namespaces:
namespace = NS_PREFIX + network.id
else:
namespace = None
if ip_lib.device_exists(interface_name,
self.root_helper,
namespace):
if not reuse_existing:
raise exceptions.PreexistingDeviceFailure(
dev_name=interface_name)
LOG.debug(_('Reusing existing device: %s.'), interface_name)
else:
self.driver.plug(network.id,
port.id,
interface_name,
port.mac_address,
namespace=namespace)
ip_cidrs = []
for fixed_ip in port.fixed_ips:
subnet = fixed_ip.subnet
net = netaddr.IPNetwork(subnet.cidr)
ip_cidr = '%s/%s' % (fixed_ip.ip_address, net.prefixlen)
ip_cidrs.append(ip_cidr)
if (self.conf.enable_isolated_metadata and
self.conf.use_namespaces):
ip_cidrs.append(METADATA_DEFAULT_IP)
self.driver.init_l3(interface_name, ip_cidrs,
namespace=namespace)
# ensure that the dhcp interface is first in the list
if namespace is None:
device = ip_lib.IPDevice(interface_name,
self.root_helper)
device.route.pullup_route(interface_name)
if self.conf.use_namespaces:
self._set_default_route(network)
return interface_name
def update(self, network):
"""Update device settings for the network's DHCP on this host."""
if self.conf.use_namespaces:
self._set_default_route(network)
def destroy(self, network, device_name):
"""Destroy the device used for the network's DHCP on this host."""
if self.conf.use_namespaces:
namespace = NS_PREFIX + network.id
else:
namespace = None
self.driver.unplug(device_name, namespace=namespace)
self.plugin.release_dhcp_port(network.id,
self.get_device_id(network))
class DictModel(object):
"""Convert dict into an object that provides attribute access to values."""
def __init__(self, d):
for key, value in d.iteritems():
if isinstance(value, list):
value = [DictModel(item) if isinstance(item, dict) else item
for item in value]
elif isinstance(value, dict):
value = DictModel(value)
setattr(self, key, value)
class DhcpAgentWithStateReport(DhcpAgent):
def __init__(self, host=None):
super(DhcpAgentWithStateReport, self).__init__(host=host)
@ -811,7 +579,6 @@ def register_options():
cfg.CONF.register_opts(DhcpAgent.OPTS)
config.register_agent_state_opts_helper(cfg.CONF)
config.register_root_helper(cfg.CONF)
cfg.CONF.register_opts(DeviceManager.OPTS)
cfg.CONF.register_opts(dhcp.OPTS)
cfg.CONF.register_opts(interface.OPTS)

254
neutron/agent/linux/dhcp.py
View File

@ -22,12 +22,15 @@ import shutil
import socket
import StringIO
import sys
import uuid
import netaddr
from oslo.config import cfg
from neutron.agent.linux import ip_lib
from neutron.agent.linux import utils
from neutron.common import exceptions
from neutron.openstack.common import importutils
from neutron.openstack.common import jsonutils
from neutron.openstack.common import log as logging
from neutron.openstack.common import uuidutils
@ -47,6 +50,8 @@ OPTS = [
cfg.StrOpt('dnsmasq_dns_server',
help=_('Use another DNS server before any in '
'/etc/resolv.conf.')),
cfg.StrOpt('interface_driver',
help=_("The driver used to manage the virtual interface.")),
]
IPV4 = 4
@ -56,20 +61,51 @@ TCP = 'tcp'
DNS_PORT = 53
DHCPV4_PORT = 67
DHCPV6_PORT = 547
METADATA_DEFAULT_PREFIX = 16
METADATA_DEFAULT_IP = '169.254.169.254'
METADATA_DEFAULT_CIDR = '%s/%d' % (METADATA_DEFAULT_IP,
METADATA_DEFAULT_PREFIX)
METADATA_PORT = 80
WIN2k3_STATIC_DNS = 249
NS_PREFIX = 'qdhcp-'
class DictModel(object):
"""Convert dict into an object that provides attribute access to values."""
def __init__(self, d):
for key, value in d.iteritems():
if isinstance(value, list):
value = [DictModel(item) if isinstance(item, dict) else item
for item in value]
elif isinstance(value, dict):
value = DictModel(value)
setattr(self, key, value)
class NetModel(DictModel):
def __init__(self, use_namespaces, d):
super(NetModel, self).__init__(d)
self._ns_name = (use_namespaces and
"%s%s" % (NS_PREFIX, self.id) or None)
@property
def namespace(self):
return self._ns_name
class DhcpBase(object):
__metaclass__ = abc.ABCMeta
def __init__(self, conf, network, root_helper='sudo',
device_delegate=None, namespace=None, version=None):
version=None, plugin=None):
self.conf = conf
self.network = network
self.root_helper = root_helper
self.device_delegate = device_delegate
self.namespace = namespace
self.device_manager = DeviceManager(self.conf,
self.root_helper, plugin)
self.version = version
@abc.abstractmethod
@ -84,6 +120,7 @@ class DhcpBase(object):
"""Restart the dhcp service for the network."""
self.disable(retain_port=True)
self.enable()
self.device_manager.update(self.network)
@abc.abstractproperty
def active(self):
@ -122,8 +159,8 @@ class DhcpLocalProcess(DhcpBase):
def enable(self):
"""Enables DHCP for this network by spawning a local process."""
interface_name = self.device_delegate.setup(self.network,
reuse_existing=True)
interface_name = self.device_manager.setup(self.network,
reuse_existing=True)
if self.active:
self.restart()
elif self._enable_dhcp():
@ -138,7 +175,7 @@ class DhcpLocalProcess(DhcpBase):
cmd = ['kill', '-9', pid]
utils.execute(cmd, self.root_helper)
if not retain_port:
self.device_delegate.destroy(self.network, self.interface_name)
self.device_manager.destroy(self.network, self.interface_name)
elif pid:
LOG.debug(_('DHCP for %(net_id)s pid %(pid)d is stale, ignoring '
@ -311,8 +348,9 @@ class Dnsmasq(DhcpLocalProcess):
if self.conf.dhcp_domain:
cmd.append('--domain=%s' % self.conf.dhcp_domain)
if self.namespace:
ip_wrapper = ip_lib.IPWrapper(self.root_helper, self.namespace)
if self.network.namespace:
ip_wrapper = ip_lib.IPWrapper(self.root_helper,
self.network.namespace)
ip_wrapper.netns.execute(cmd, addl_env=env)
else:
# For normal sudo prepend the env vars before command
@ -323,8 +361,9 @@ class Dnsmasq(DhcpLocalProcess):
"""Release a DHCP lease."""
for ip in removed_ips or []:
cmd = ['dhcp_release', self.interface_name, ip, mac_address]
if self.namespace:
ip_wrapper = ip_lib.IPWrapper(self.root_helper, self.namespace)
if self.network.namespace:
ip_wrapper = ip_lib.IPWrapper(self.root_helper,
self.network.namespace)
ip_wrapper.netns.execute(cmd)
else:
utils.execute(cmd, self.root_helper)
@ -347,6 +386,7 @@ class Dnsmasq(DhcpLocalProcess):
else:
LOG.debug(_('Pid %d is stale, relaunching dnsmasq'), self.pid)
LOG.debug(_('Reloading allocations for network: %s'), self.network.id)
self.device_manager.update(self.network)
def _output_hosts_file(self):
"""Writes a dnsmasq compatible hosts file."""
@ -421,7 +461,7 @@ class Dnsmasq(DhcpLocalProcess):
ip_dev = ip_lib.IPDevice(
self.interface_name,
self.root_helper,
self.namespace
self.network.namespace
)
subnet_lookup = dict(
@ -476,3 +516,195 @@ class Dnsmasq(DhcpLocalProcess):
sock.connect(dhcp_relay_socket)
sock.send(jsonutils.dumps(data))
sock.close()
class DeviceManager(object):
def __init__(self, conf, root_helper, plugin):
self.conf = conf
self.root_helper = root_helper
self.plugin = plugin
if not conf.interface_driver:
raise SystemExit(_('You must specify an interface driver'))
try:
self.driver = importutils.import_object(
conf.interface_driver, conf)
except Exception as e:
msg = (_("Error importing interface driver '%(driver)s': "
"%(inner)s") % {'driver': conf.interface_driver,
'inner': e})
raise SystemExit(msg)
def get_interface_name(self, network, port):
"""Return interface(device) name for use by the DHCP process."""
return self.driver.get_device_name(port)
def get_device_id(self, network):
"""Return a unique DHCP device ID for this host on the network."""
# There could be more than one dhcp server per network, so create
# a device id that combines host and network ids
host_uuid = uuid.uuid5(uuid.NAMESPACE_DNS, socket.gethostname())
return 'dhcp%s-%s' % (host_uuid, network.id)
def _get_device(self, network):
"""Return DHCP ip_lib device for this host on the network."""
device_id = self.get_device_id(network)
port = self.plugin.get_dhcp_port(network.id, device_id)
interface_name = self.get_interface_name(network, port)
return ip_lib.IPDevice(interface_name,
self.root_helper,
network.namespace)
def _set_default_route(self, network):
"""Sets the default gateway for this dhcp namespace.
This method is idempotent and will only adjust the route if adjusting
it would change it from what it already is. This makes it safe to call
and avoids unnecessary perturbation of the system.
"""
device = self._get_device(network)
gateway = device.route.get_gateway()
if gateway:
gateway = gateway['gateway']
for subnet in network.subnets:
skip_subnet = (
subnet.ip_version != 4
or not subnet.enable_dhcp
or subnet.gateway_ip is None)
if skip_subnet:
continue
if gateway != subnet.gateway_ip:
m = _('Setting gateway for dhcp netns on net %(n)s to %(ip)s')
LOG.debug(m, {'n': network.id, 'ip': subnet.gateway_ip})
device.route.add_gateway(subnet.gateway_ip)
return
# No subnets on the network have a valid gateway. Clean it up to avoid
# confusion from seeing an invalid gateway here.
if gateway is not None:
msg = _('Removing gateway for dhcp netns on net %s')
LOG.debug(msg, network.id)
device.route.delete_gateway(gateway)
def setup_dhcp_port(self, network):
"""Create/update DHCP port for the host if needed and return port."""
device_id = self.get_device_id(network)
subnets = {}
dhcp_enabled_subnet_ids = []
for subnet in network.subnets:
if subnet.enable_dhcp:
dhcp_enabled_subnet_ids.append(subnet.id)
subnets[subnet.id] = subnet
dhcp_port = None
for port in network.ports:
port_device_id = getattr(port, 'device_id', None)
if port_device_id == device_id:
port_fixed_ips = []
for fixed_ip in port.fixed_ips:
port_fixed_ips.append({'subnet_id': fixed_ip.subnet_id,
'ip_address': fixed_ip.ip_address})
if fixed_ip.subnet_id in dhcp_enabled_subnet_ids:
dhcp_enabled_subnet_ids.remove(fixed_ip.subnet_id)
# If there are dhcp_enabled_subnet_ids here that means that
# we need to add those to the port and call update.
if dhcp_enabled_subnet_ids:
port_fixed_ips.extend(
[dict(subnet_id=s) for s in dhcp_enabled_subnet_ids])
dhcp_port = self.plugin.update_dhcp_port(
port.id, {'port': {'fixed_ips': port_fixed_ips}})
else:
dhcp_port = port
# break since we found port that matches device_id
break
# DHCP port has not yet been created.
if dhcp_port is None:
LOG.debug(_('DHCP port %(device_id)s on network %(network_id)s'
' does not yet exist.'), {'device_id': device_id,
'network_id': network.id})
port_dict = dict(
name='',
admin_state_up=True,
device_id=device_id,
network_id=network.id,
tenant_id=network.tenant_id,
fixed_ips=[dict(subnet_id=s) for s in dhcp_enabled_subnet_ids])
dhcp_port = self.plugin.create_dhcp_port({'port': port_dict})
# Convert subnet_id to subnet dict
fixed_ips = [dict(subnet_id=fixed_ip.subnet_id,
ip_address=fixed_ip.ip_address,
subnet=subnets[fixed_ip.subnet_id])
for fixed_ip in dhcp_port.fixed_ips]
ips = [DictModel(item) if isinstance(item, dict) else item
for item in fixed_ips]
dhcp_port.fixed_ips = ips
return dhcp_port
def setup(self, network, reuse_existing=False):
"""Create and initialize a device for network's DHCP on this host."""
port = self.setup_dhcp_port(network)
interface_name = self.get_interface_name(network, port)
if ip_lib.device_exists(interface_name,
self.root_helper,
network.namespace):
if not reuse_existing:
raise exceptions.PreexistingDeviceFailure(
dev_name=interface_name)
LOG.debug(_('Reusing existing device: %s.'), interface_name)
else:
self.driver.plug(network.id,
port.id,
interface_name,
port.mac_address,
namespace=network.namespace)
ip_cidrs = []
for fixed_ip in port.fixed_ips:
subnet = fixed_ip.subnet
net = netaddr.IPNetwork(subnet.cidr)
ip_cidr = '%s/%s' % (fixed_ip.ip_address, net.prefixlen)
ip_cidrs.append(ip_cidr)
if (self.conf.enable_isolated_metadata and
self.conf.use_namespaces):
ip_cidrs.append(METADATA_DEFAULT_CIDR)
self.driver.init_l3(interface_name, ip_cidrs,
namespace=network.namespace)
# ensure that the dhcp interface is first in the list
if network.namespace is None:
device = ip_lib.IPDevice(interface_name,
self.root_helper)
device.route.pullup_route(interface_name)
if self.conf.use_namespaces:
self._set_default_route(network)
return interface_name
def update(self, network):
"""Update device settings for the network's DHCP on this host."""
if self.conf.use_namespaces:
self._set_default_route(network)
def destroy(self, network, device_name):
"""Destroy the device used for the network's DHCP on this host."""
self.driver.unplug(device_name, namespace=network.namespace)
self.plugin.release_dhcp_port(network.id,
self.get_device_id(network))

16
neutron/agent/netns_cleanup_util.py
View File

@ -21,7 +21,6 @@ import eventlet
from oslo.config import cfg
from neutron.agent.common import config as agent_config
from neutron.agent import dhcp_agent
from neutron.agent import l3_agent
from neutron.agent.linux import dhcp
from neutron.agent.linux import ip_lib
@ -33,17 +32,10 @@ from neutron.openstack.common import log as logging
LOG = logging.getLogger(__name__)
NS_MANGLING_PATTERN = ('(%s|%s)' % (dhcp_agent.NS_PREFIX, l3_agent.NS_PREFIX) +
NS_MANGLING_PATTERN = ('(%s|%s)' % (dhcp.NS_PREFIX, l3_agent.NS_PREFIX) +
attributes.UUID_PATTERN)
class NullDelegate(object):
def __getattribute__(self, name):
def noop(*args, **kwargs):
pass
return noop
class FakeNetwork(object):
def __init__(self, id):
self.id = id
@ -79,15 +71,13 @@ def setup_conf():
def kill_dhcp(conf, namespace):
"""Disable DHCP for a network if DHCP is still active."""
root_helper = agent_config.get_root_helper(conf)
network_id = namespace.replace(dhcp_agent.NS_PREFIX, '')
network_id = namespace.replace(dhcp.NS_PREFIX, '')
null_delegate = NullDelegate()
dhcp_driver = importutils.import_object(
conf.dhcp_driver,
conf,
FakeNetwork(network_id),
root_helper,
null_delegate)
root_helper)
if dhcp_driver.active:
dhcp_driver.disable()

2
neutron/debug/debug_agent.py
View File

@ -22,7 +22,7 @@ import netaddr
from oslo.config import cfg
from neutron.agent.common import config
from neutron.agent.dhcp_agent import DictModel
from neutron.agent.linux.dhcp import DictModel
from neutron.agent.linux import ip_lib
from neutron.agent.linux import utils
from neutron.openstack.common import log as logging

6
neutron/tests/unit/test_agent_netns_cleanup.py
View File

@ -22,12 +22,6 @@ from neutron.agent import netns_cleanup_util as util
from neutron.tests import base
class TestNullDelegate(base.BaseTestCase):
def test_getattribute(self):
null_delegate = util.NullDelegate()
self.assertIsNone(null_delegate.test())
class TestNetnsCleanup(base.BaseTestCase):
def setUp(self):
super(TestNetnsCleanup, self).setUp()

385
neutron/tests/unit/test_dhcp_agent.py
View File

@ -30,7 +30,7 @@ from neutron.agent import dhcp_agent
from neutron.agent.dhcp_agent import DhcpAgentWithStateReport
from neutron.agent.linux import dhcp
from neutron.agent.linux import interface
from neutron.common import constants
from neutron.common import constants as const
from neutron.common import exceptions
from neutron.tests import base
@ -38,92 +38,91 @@ from neutron.tests import base
ROOTDIR = os.path.dirname(os.path.dirname(__file__))
ETCDIR = os.path.join(ROOTDIR, 'etc')
HOSTNAME = 'hostname'
dev_man = dhcp.DeviceManager
rpc_api = dhcp_agent.DhcpPluginApi
DEVICE_MANAGER = '%s.%s' % (dev_man.__module__, dev_man.__name__)
DHCP_PLUGIN = '%s.%s' % (rpc_api.__module__, rpc_api.__name__)
def etcdir(*p):
return os.path.join(ETCDIR, *p)
class FakeModel:
def __init__(self, id_, **kwargs):
self.id = id_
self.__dict__.update(kwargs)
def __str__(self):
return str(self.__dict__)
fake_tenant_id = 'aaaaaaaa-aaaa-aaaa-aaaaaaaaaaaa'
fake_subnet1_allocation_pools = FakeModel('', start='172.9.9.2',
end='172.9.9.254')
fake_subnet1 = FakeModel('bbbbbbbb-bbbb-bbbb-bbbbbbbbbbbb',
network_id='12345678-1234-5678-1234567890ab',
cidr='172.9.9.0/24', enable_dhcp=True, name='',
tenant_id=fake_tenant_id, gateway_ip='172.9.9.1',
host_routes=[], dns_nameservers=[], ip_version=4,
allocation_pools=fake_subnet1_allocation_pools)
fake_subnet1_allocation_pools = dhcp.DictModel(dict(id='', start='172.9.9.2',
end='172.9.9.254'))
fake_subnet1 = dhcp.DictModel(dict(id='bbbbbbbb-bbbb-bbbb-bbbbbbbbbbbb',
network_id='12345678-1234-5678-1234567890ab',
cidr='172.9.9.0/24', enable_dhcp=True, name='',
tenant_id=fake_tenant_id,
gateway_ip='172.9.9.1', host_routes=[],
dns_nameservers=[], ip_version=4,
allocation_pools=fake_subnet1_allocation_pools))
fake_subnet2_allocation_pools = FakeModel('', start='172.9.8.2',
end='172.9.8.254')
fake_subnet2 = FakeModel('dddddddd-dddd-dddd-dddddddddddd',
network_id='12345678-1234-5678-1234567890ab',
cidr='172.9.8.0/24', enable_dhcp=False, name='',
tenant_id=fake_tenant_id, gateway_ip='172.9.8.1',
host_routes=[], dns_nameservers=[], ip_version=4,
allocation_pools=fake_subnet2_allocation_pools)
fake_subnet2_allocation_pools = dhcp.DictModel(dict(id='', start='172.9.8.2',
end='172.9.8.254'))
fake_subnet2 = dhcp.DictModel(dict(id='dddddddd-dddd-dddd-dddddddddddd',
network_id='12345678-1234-5678-1234567890ab',
cidr='172.9.8.0/24', enable_dhcp=False, name='',
tenant_id=fake_tenant_id, gateway_ip='172.9.8.1',
host_routes=[], dns_nameservers=[], ip_version=4,
allocation_pools=fake_subnet2_allocation_pools))
fake_subnet3 = FakeModel('bbbbbbbb-1111-2222-bbbbbbbbbbbb',
network_id='12345678-1234-5678-1234567890ab',
cidr='192.168.1.1/24', enable_dhcp=True)
fake_subnet3 = dhcp.DictModel(dict(id='bbbbbbbb-1111-2222-bbbbbbbbbbbb',
network_id='12345678-1234-5678-1234567890ab',
cidr='192.168.1.1/24', enable_dhcp=True))
fake_meta_subnet = FakeModel('bbbbbbbb-1111-2222-bbbbbbbbbbbb',
network_id='12345678-1234-5678-1234567890ab',
cidr='169.254.169.252/30',
gateway_ip='169.254.169.253', enable_dhcp=True)
fake_meta_subnet = dhcp.DictModel(dict(id='bbbbbbbb-1111-2222-bbbbbbbbbbbb',
network_id='12345678-1234-5678-1234567890ab',
cidr='169.254.169.252/30',
gateway_ip='169.254.169.253',
enable_dhcp=True))
fake_fixed_ip1 = FakeModel('', subnet_id=fake_subnet1.id,
ip_address='172.9.9.9')
fake_meta_fixed_ip = FakeModel('', subnet=fake_meta_subnet,
ip_address='169.254.169.254')
fake_allocation_pool_subnet1 = FakeModel('', start='172.9.9.2',
end='172.9.9.254')
fake_fixed_ip1 = dhcp.DictModel(dict(id='', subnet_id=fake_subnet1.id,
ip_address='172.9.9.9'))
fake_meta_fixed_ip = dhcp.DictModel(dict(id='', subnet=fake_meta_subnet,
ip_address='169.254.169.254'))
fake_allocation_pool_subnet1 = dhcp.DictModel(dict(id='', start='172.9.9.2',
end='172.9.9.254'))
fake_port1 = dhcp.DictModel(dict(id='12345678-1234-aaaa-1234567890ab',
device_id='dhcp-12345678-1234-aaaa-1234567890ab',
allocation_pools=fake_subnet1_allocation_pools,
mac_address='aa:bb:cc:dd:ee:ff',
network_id='12345678-1234-5678-1234567890ab',
fixed_ips=[fake_fixed_ip1]))
fake_port1 = FakeModel('12345678-1234-aaaa-1234567890ab',
device_id='dhcp-12345678-1234-aaaa-1234567890ab',
allocation_pools=fake_subnet1_allocation_pools,
mac_address='aa:bb:cc:dd:ee:ff',
network_id='12345678-1234-5678-1234567890ab',
fixed_ips=[fake_fixed_ip1])
fake_port2 = dhcp.DictModel(dict(id='12345678-1234-aaaa-123456789000',
mac_address='aa:bb:cc:dd:ee:99',
network_id='12345678-1234-5678-1234567890ab',
fixed_ips=[]))
fake_port2 = FakeModel('12345678-1234-aaaa-123456789000',
mac_address='aa:bb:cc:dd:ee:99',
network_id='12345678-1234-5678-1234567890ab',
fixed_ips=[])
fake_meta_port = dhcp.DictModel(dict(id='12345678-1234-aaaa-1234567890ab',
mac_address='aa:bb:cc:dd:ee:ff',
network_id='12345678-1234-5678-1234567890ab',
device_owner=const.DEVICE_OWNER_ROUTER_INTF,
device_id='forzanapoli',
fixed_ips=[fake_meta_fixed_ip]))
fake_meta_port = FakeModel('12345678-1234-aaaa-1234567890ab',
mac_address='aa:bb:cc:dd:ee:ff',
network_id='12345678-1234-5678-1234567890ab',
device_owner=constants.DEVICE_OWNER_ROUTER_INTF,
device_id='forzanapoli',
fixed_ips=[fake_meta_fixed_ip])
fake_network = dhcp.NetModel(True, dict(id='12345678-1234-5678-1234567890ab',
tenant_id='aaaaaaaa-aaaa-aaaa-aaaaaaaaaaaa',
admin_state_up=True,
subnets=[fake_subnet1, fake_subnet2],
ports=[fake_port1]))
fake_network = FakeModel('12345678-1234-5678-1234567890ab',
tenant_id='aaaaaaaa-aaaa-aaaa-aaaaaaaaaaaa',
admin_state_up=True,
subnets=[fake_subnet1, fake_subnet2],
ports=[fake_port1])
fake_meta_network = dhcp.NetModel(True,
dict(id='12345678-1234-5678-1234567890ab',
tenant_id='aaaaaaaa-aaaa-aaaa-aaaaaaaaaaaa',
admin_state_up=True,
subnets=[fake_meta_subnet],
ports=[fake_meta_port]))
fake_meta_network = FakeModel('12345678-1234-5678-1234567890ab',
tenant_id='aaaaaaaa-aaaa-aaaa-aaaaaaaaaaaa',
admin_state_up=True,
subnets=[fake_meta_subnet],
ports=[fake_meta_port])
fake_down_network = FakeModel('12345678-dddd-dddd-1234567890ab',
tenant_id='aaaaaaaa-aaaa-aaaa-aaaaaaaaaaaa',
admin_state_up=False,
subnets=[],
ports=[])
fake_down_network = dhcp.NetModel(True,
dict(id='12345678-dddd-dddd-1234567890ab',
tenant_id='aaaaaaaa-aaaa-aaaa-aaaaaaaaaaaa',
admin_state_up=False,
subnets=[],
ports=[]))
class TestDhcpAgent(base.BaseTestCase):
@ -163,8 +162,6 @@ class TestDhcpAgent(base.BaseTestCase):
cfg.CONF.register_opts(dhcp_agent.DhcpAgent.OPTS)
config.register_agent_state_opts_helper(cfg.CONF)
config.register_root_helper(cfg.CONF)
cfg.CONF.register_opts(
dhcp_agent.DeviceManager.OPTS)
cfg.CONF.register_opts(dhcp.OPTS)
cfg.CONF.register_opts(interface.OPTS)
cfg.CONF(project='neutron')
@ -192,7 +189,7 @@ class TestDhcpAgent(base.BaseTestCase):
mock.call().wait()])
def test_run_completes_single_pass(self):
with mock.patch('neutron.agent.dhcp_agent.DeviceManager'):
with mock.patch(DEVICE_MANAGER):
dhcp = dhcp_agent.DhcpAgent(HOSTNAME)
attrs_to_mock = dict(
[(a, mock.DEFAULT) for a in
@ -202,53 +199,34 @@ class TestDhcpAgent(base.BaseTestCase):
mocks['sync_state'].assert_called_once_with()
mocks['periodic_resync'].assert_called_once_with()
def test_ns_name(self):
with mock.patch('neutron.agent.dhcp_agent.DeviceManager'):
mock_net = mock.Mock(id='foo')
dhcp = dhcp_agent.DhcpAgent(HOSTNAME)
self.assertEqual(dhcp._ns_name(mock_net), 'qdhcp-foo')
def test_ns_name_disabled_namespace(self):
with mock.patch('neutron.agent.dhcp_agent.DeviceManager'):
cfg.CONF.set_override('use_namespaces', False)
mock_net = mock.Mock(id='foo')
dhcp = dhcp_agent.DhcpAgent(HOSTNAME)
self.assertIsNone(dhcp._ns_name(mock_net))
def test_call_driver(self):
network = mock.Mock()
network.id = '1'
with mock.patch('neutron.agent.dhcp_agent.DeviceManager') as dev_mgr:
dhcp = dhcp_agent.DhcpAgent(cfg.CONF)
self.assertTrue(dhcp.call_driver('foo', network))
self.assertTrue(dev_mgr.called)
self.driver.assert_called_once_with(cfg.CONF,
mock.ANY,
'sudo',
mock.ANY,
'qdhcp-1',
mock.ANY)
dhcp = dhcp_agent.DhcpAgent(cfg.CONF)
self.assertTrue(dhcp.call_driver('foo', network))
self.driver.assert_called_once_with(cfg.CONF,
mock.ANY,
'sudo',
mock.ANY,
mock.ANY)
def test_call_driver_failure(self):
network = mock.Mock()
network.id = '1'
self.driver.return_value.foo.side_effect = Exception
with mock.patch('neutron.agent.dhcp_agent.DeviceManager') as dev_mgr:
with mock.patch.object(dhcp_agent.LOG, 'exception') as log:
dhcp = dhcp_agent.DhcpAgent(HOSTNAME)
self.assertIsNone(dhcp.call_driver('foo', network))
self.assertTrue(dev_mgr.called)
self.driver.assert_called_once_with(cfg.CONF,
mock.ANY,
'sudo',
mock.ANY,
'qdhcp-1',
mock.ANY)
self.assertEqual(log.call_count, 1)
self.assertTrue(dhcp.needs_resync)
with mock.patch.object(dhcp_agent.LOG, 'exception') as log:
dhcp = dhcp_agent.DhcpAgent(HOSTNAME)
self.assertIsNone(dhcp.call_driver('foo', network))
self.driver.assert_called_once_with(cfg.CONF,
mock.ANY,
'sudo',
mock.ANY,
mock.ANY)
self.assertEqual(log.call_count, 1)
self.assertTrue(dhcp.needs_resync)
def _test_sync_state_helper(self, known_networks, active_networks):
with mock.patch('neutron.agent.dhcp_agent.DhcpPluginApi') as plug:
with mock.patch(DHCP_PLUGIN) as plug:
mock_plugin = mock.Mock()
mock_plugin.get_active_networks_info.return_value = active_networks
plug.return_value = mock_plugin
@ -283,7 +261,7 @@ class TestDhcpAgent(base.BaseTestCase):
self._test_sync_state_helper(['b'], ['a'])
def test_sync_state_plugin_error(self):
with mock.patch('neutron.agent.dhcp_agent.DhcpPluginApi') as plug:
with mock.patch(DHCP_PLUGIN) as plug:
mock_plugin = mock.Mock()
mock_plugin.get_active_networks_info.side_effect = Exception
plug.return_value = mock_plugin
@ -351,7 +329,7 @@ class TestLogArgs(base.BaseTestCase):
'log_file': None,
'use_syslog': True,
'syslog_log_facility': 'LOG_USER'}
conf = dhcp_agent.DictModel(conf_dict)
conf = dhcp.DictModel(conf_dict)
expected_args = ['--debug',
'--use-syslog',
'--syslog-log-facility=LOG_USER']
@ -365,7 +343,7 @@ class TestLogArgs(base.BaseTestCase):
'log_file': None,
'use_syslog': False,
'syslog_log_facility': 'LOG_USER'}
conf = dhcp_agent.DictModel(conf_dict)
conf = dhcp.DictModel(conf_dict)
expected_args = ['--debug',
'--verbose',
'--log-file=log_file_name',
@ -380,7 +358,7 @@ class TestLogArgs(base.BaseTestCase):
'log_file': 'tests/filelog',
'use_syslog': False,
'syslog_log_facility': 'LOG_USER'}
conf = dhcp_agent.DictModel(conf_dict)
conf = dhcp.DictModel(conf_dict)
expected_args = ['--debug',
'--log-file=log_file_name',
'--log-dir=/etc/tests/tests']
@ -394,7 +372,7 @@ class TestLogArgs(base.BaseTestCase):
'log_dir': None,
'use_syslog': False,
'syslog_log_facility': 'LOG_USER'}
conf = dhcp_agent.DictModel(conf_dict)
conf = dhcp.DictModel(conf_dict)
expected_args = ['--debug',
'--log-file=log_file_name',
'--log-dir=tests']
@ -408,7 +386,7 @@ class TestLogArgs(base.BaseTestCase):
'log_dir': '/etc/tests',
'use_syslog': True,
'syslog_log_facility': 'LOG_USER'}
conf = dhcp_agent.DictModel(conf_dict)
conf = dhcp.DictModel(conf_dict)
expected_args = ['--debug',
'--verbose',
'--log-file=log_file_name',
@ -420,14 +398,13 @@ class TestLogArgs(base.BaseTestCase):
class TestDhcpAgentEventHandler(base.BaseTestCase):
def setUp(self):
super(TestDhcpAgentEventHandler, self).setUp()
cfg.CONF.register_opts(dhcp_agent.DeviceManager.OPTS)
cfg.CONF.register_opts(dhcp.OPTS)
cfg.CONF.set_override('interface_driver',
'neutron.agent.linux.interface.NullDriver')
config.register_root_helper(cfg.CONF)
cfg.CONF.register_opts(dhcp_agent.DhcpAgent.OPTS)
self.plugin_p = mock.patch('neutron.agent.dhcp_agent.DhcpPluginApi')
self.plugin_p = mock.patch(DHCP_PLUGIN)
plugin_cls = self.plugin_p.start()
self.plugin = mock.Mock()
plugin_cls.return_value = self.plugin
@ -665,11 +642,11 @@ class TestDhcpAgentEventHandler(base.BaseTestCase):
disable.assertCalledOnceWith(fake_network.id)
def test_refresh_dhcp_helper_no_dhcp_enabled_networks(self):
network = FakeModel('net-id',
tenant_id='aaaaaaaa-aaaa-aaaa-aaaaaaaaaaaa',
admin_state_up=True,
subnets=[],
ports=[])
network = dhcp.NetModel(True, dict(id='net-id',
tenant_id='aaaaaaaa-aaaa-aaaa-aaaaaaaaaaaa',
admin_state_up=True,
subnets=[],
ports=[]))
self.cache.get_network_by_id.return_value = network
self.plugin.get_network_info.return_value = network
@ -682,11 +659,11 @@ class TestDhcpAgentEventHandler(base.BaseTestCase):
[mock.call.get_network_by_id('net-id')])
def test_refresh_dhcp_helper_exception_during_rpc(self):
network = FakeModel('net-id',
tenant_id='aaaaaaaa-aaaa-aaaa-aaaaaaaaaaaa',
admin_state_up=True,
subnets=[],
ports=[])
network = dhcp.NetModel(True, dict(id='net-id',
tenant_id='aaaaaaaa-aaaa-aaaa-aaaaaaaaaaaa',
admin_state_up=True,
subnets=[],
ports=[]))
self.cache.get_network_by_id.return_value = network
self.plugin.get_network_info.side_effect = Exception
@ -702,46 +679,41 @@ class TestDhcpAgentEventHandler(base.BaseTestCase):
payload = dict(subnet=dict(network_id=fake_network.id))
self.cache.get_network_by_id.return_value = fake_network
self.plugin.get_network_info.return_value = fake_network
self.dhcp.device_manager.update = mock.Mock()
self.dhcp.subnet_update_end(None, payload)
self.cache.assert_has_calls([mock.call.put(fake_network)])
self.call_driver.assert_called_once_with('reload_allocations',
fake_network)
self.dhcp.device_manager.update.assert_called_once_with(fake_network)
def test_subnet_update_end_restart(self):
new_state = FakeModel(fake_network.id,
tenant_id=fake_network.tenant_id,
admin_state_up=True,
subnets=[fake_subnet1, fake_subnet3],
ports=[fake_port1])
new_state = dhcp.NetModel(True, dict(id=fake_network.id,
tenant_id=fake_network.tenant_id,
admin_state_up=True,
subnets=[fake_subnet1, fake_subnet3],
ports=[fake_port1]))
payload = dict(subnet=dict(network_id=fake_network.id))
self.cache.get_network_by_id.return_value = fake_network
self.plugin.get_network_info.return_value = new_state
self.dhcp.device_manager.update = mock.Mock()
self.dhcp.subnet_update_end(None, payload)
self.cache.assert_has_calls([mock.call.put(new_state)])
self.call_driver.assert_called_once_with('restart',
new_state)
self.dhcp.device_manager.update.assert_called_once_with(new_state)
def test_subnet_update_end_delete_payload(self):
prev_state = FakeModel(fake_network.id,
tenant_id=fake_network.tenant_id,
admin_state_up=True,
subnets=[fake_subnet1, fake_subnet3],
ports=[fake_port1])
prev_state = dhcp.NetModel(True, dict(id=fake_network.id,
tenant_id=fake_network.tenant_id,
admin_state_up=True,
subnets=[fake_subnet1, fake_subnet3],
ports=[fake_port1]))
payload = dict(subnet_id=fake_subnet1.id)
self.cache.get_network_by_subnet_id.return_value = prev_state
self.cache.get_network_by_id.return_value = prev_state
self.plugin.get_network_info.return_value = fake_network
self.dhcp.device_manager.update = mock.Mock()
self.dhcp.subnet_delete_end(None, payload)
@ -752,7 +724,6 @@ class TestDhcpAgentEventHandler(base.BaseTestCase):
mock.call.put(fake_network)])
self.call_driver.assert_called_once_with('restart',
fake_network)
self.dhcp.device_manager.update.assert_called_once_with(fake_network)
def test_port_update_end(self):
payload = dict(port=vars(fake_port2))
@ -817,7 +788,7 @@ class TestDhcpAgentEventHandler(base.BaseTestCase):
class TestDhcpPluginApiProxy(base.BaseTestCase):
def setUp(self):
super(TestDhcpPluginApiProxy, self).setUp()
self.proxy = dhcp_agent.DhcpPluginApi('foo', {})
self.proxy = dhcp_agent.DhcpPluginApi('foo', {}, None)
self.proxy.host = 'foo'
self.call_p = mock.patch.object(self.proxy, 'call')
@ -962,40 +933,42 @@ class TestNetworkCache(base.BaseTestCase):
fake_network)
def test_put_port(self):
fake_network = FakeModel('12345678-1234-5678-1234567890ab',
fake_net = dhcp.NetModel(True,
dict(id='12345678-1234-5678-1234567890ab',
tenant_id='aaaaaaaa-aaaa-aaaa-aaaaaaaaaaaa',
subnets=[fake_subnet1],
ports=[fake_port1])
ports=[fake_port1]))
nc = dhcp_agent.NetworkCache()
nc.put(fake_network)
nc.put(fake_net)
nc.put_port(fake_port2)
self.assertEqual(len(nc.port_lookup), 2)
self.assertIn(fake_port2, fake_network.ports)
self.assertIn(fake_port2, fake_net.ports)
def test_put_port_existing(self):
fake_network = FakeModel('12345678-1234-5678-1234567890ab',
fake_net = dhcp.NetModel(True,
dict(id='12345678-1234-5678-1234567890ab',
tenant_id='aaaaaaaa-aaaa-aaaa-aaaaaaaaaaaa',
subnets=[fake_subnet1],
ports=[fake_port1, fake_port2])
ports=[fake_port1, fake_port2]))
nc = dhcp_agent.NetworkCache()
nc.put(fake_network)
nc.put(fake_net)
nc.put_port(fake_port2)
self.assertEqual(len(nc.port_lookup), 2)
self.assertIn(fake_port2, fake_network.ports)
self.assertIn(fake_port2, fake_net.ports)
def test_remove_port_existing(self):
fake_network = FakeModel('12345678-1234-5678-1234567890ab',
fake_net = dhcp.NetModel(True,
dict(id='12345678-1234-5678-1234567890ab',
tenant_id='aaaaaaaa-aaaa-aaaa-aaaaaaaaaaaa',
subnets=[fake_subnet1],
ports=[fake_port1, fake_port2])
ports=[fake_port1, fake_port2]))
nc = dhcp_agent.NetworkCache()
nc.put(fake_network)
nc.put(fake_net)
nc.remove_port(fake_port2)
self.assertEqual(len(nc.port_lookup), 1)
self.assertNotIn(fake_port2, fake_network.ports)
self.assertNotIn(fake_port2, fake_net.ports)
def test_get_port_by_id(self):
nc = dhcp_agent.NetworkCache()
@ -1044,8 +1017,8 @@ class FakeV4NetworkNoGateway:
class TestDeviceManager(base.BaseTestCase):
def setUp(self):
super(TestDeviceManager, self).setUp()
cfg.CONF.register_opts(dhcp_agent.DeviceManager.OPTS)
cfg.CONF.register_opts(dhcp_agent.DhcpAgent.OPTS)
cfg.CONF.register_opts(dhcp.OPTS)
cfg.CONF.set_override('interface_driver',
'neutron.agent.linux.interface.NullDriver')
config.register_root_helper(cfg.CONF)
@ -1085,7 +1058,7 @@ class TestDeviceManager(base.BaseTestCase):
self.device_exists.return_value = device_exists
self.mock_driver.get_device_name.return_value = 'tap12345678-12'
dh = dhcp_agent.DeviceManager(cfg.CONF, plugin)
dh = dhcp.DeviceManager(cfg.CONF, cfg.CONF.root_helper, plugin)
dh._set_default_route = mock.Mock()
interface_name = dh.setup(net, reuse_existing)
@ -1099,20 +1072,21 @@ class TestDeviceManager(base.BaseTestCase):
[{'subnet_id': fake_fixed_ip1.subnet_id}],
'device_id': mock.ANY}})])
namespace = dhcp_agent.NS_PREFIX + net.id
expected_ips = ['172.9.9.9/24', '169.254.169.254/16']
expected = [mock.call.init_l3('tap12345678-12',
expected_ips,
namespace=namespace)]
expected = [
mock.call.get_device_name(port),
mock.call.init_l3(
'tap12345678-12',
expected_ips,
namespace=net.namespace)]
if not reuse_existing:
expected.insert(0,
expected.insert(1,
mock.call.plug(net.id,
port.id,
'tap12345678-12',
'aa:bb:cc:dd:ee:ff',
namespace=namespace))
namespace=net.namespace))
self.mock_driver.assert_has_calls(expected)
dh._set_default_route.assert_called_once_with(net)
@ -1132,7 +1106,7 @@ class TestDeviceManager(base.BaseTestCase):
def test_create_dhcp_port_create_new(self):
plugin = mock.Mock()
dh = dhcp_agent.DeviceManager(cfg.CONF, plugin)
dh = dhcp.DeviceManager(cfg.CONF, cfg.CONF.root_helper, plugin)
plugin.create_dhcp_port.return_value = fake_network.ports[0]
dh.setup_dhcp_port(fake_network)
plugin.assert_has_calls([
@ -1146,7 +1120,7 @@ class TestDeviceManager(base.BaseTestCase):
def test_create_dhcp_port_update_add_subnet(self):
plugin = mock.Mock()
dh = dhcp_agent.DeviceManager(cfg.CONF, plugin)
dh = dhcp.DeviceManager(cfg.CONF, cfg.CONF.root_helper, plugin)
fake_network_copy = copy.deepcopy(fake_network)
fake_network_copy.ports[0].device_id = dh.get_device_id(fake_network)
fake_network_copy.subnets[1].enable_dhcp = True
@ -1163,7 +1137,7 @@ class TestDeviceManager(base.BaseTestCase):
def test_create_dhcp_port_no_update_or_create(self):
plugin = mock.Mock()
dh = dhcp_agent.DeviceManager(cfg.CONF, plugin)
dh = dhcp.DeviceManager(cfg.CONF, cfg.CONF.root_helper, plugin)
fake_network_copy = copy.deepcopy(fake_network)
fake_network_copy.ports[0].device_id = dh.get_device_id(fake_network)
dh.setup_dhcp_port(fake_network_copy)
@ -1171,11 +1145,12 @@ class TestDeviceManager(base.BaseTestCase):
self.assertFalse(plugin.update_dhcp_port.called)
def test_destroy(self):
fake_network = FakeModel('12345678-1234-5678-1234567890ab',
tenant_id='aaaaaaaa-aaaa-aaaa-aaaaaaaaaaaa')
fake_net = dhcp.NetModel(True,
dict(id='12345678-1234-5678-1234567890ab',
tenant_id='aaaaaaaa-aaaa-aaaa-aaaaaaaaaaaa'))
fake_port = FakeModel('12345678-1234-aaaa-1234567890ab',
mac_address='aa:bb:cc:dd:ee:ff')
fake_port = dhcp.DictModel(dict(id='12345678-1234-aaaa-1234567890ab',
mac_address='aa:bb:cc:dd:ee:ff'))
with mock.patch('neutron.agent.linux.interface.NullDriver') as dvr_cls:
mock_driver = mock.MagicMock()
@ -1185,22 +1160,23 @@ class TestDeviceManager(base.BaseTestCase):
plugin = mock.Mock()
plugin.get_dhcp_port.return_value = fake_port
dh = dhcp_agent.DeviceManager(cfg.CONF, plugin)
dh.destroy(fake_network, 'tap12345678-12')
dh = dhcp.DeviceManager(cfg.CONF, cfg.CONF.root_helper, plugin)
dh.destroy(fake_net, 'tap12345678-12')
dvr_cls.assert_called_once_with(cfg.CONF)
mock_driver.assert_has_calls(
[mock.call.unplug('tap12345678-12',
namespace='qdhcp-' + fake_network.id)])
namespace='qdhcp-' + fake_net.id)])
plugin.assert_has_calls(
[mock.call.release_dhcp_port(fake_network.id, mock.ANY)])
[mock.call.release_dhcp_port(fake_net.id, mock.ANY)])
def test_get_interface_name(self):
fake_network = FakeModel('12345678-1234-5678-1234567890ab',
tenant_id='aaaaaaaa-aaaa-aaaa-aaaaaaaaaaaa')
fake_net = dhcp.NetModel(True,
dict(id='12345678-1234-5678-1234567890ab',
tenant_id='aaaaaaaa-aaaa-aaaa-aaaaaaaaaaaa'))
fake_port = FakeModel('12345678-1234-aaaa-1234567890ab',
mac_address='aa:bb:cc:dd:ee:ff')
fake_port = dhcp.DictModel(dict(id='12345678-1234-aaaa-1234567890ab',
mac_address='aa:bb:cc:dd:ee:ff'))
with mock.patch('neutron.agent.linux.interface.NullDriver') as dvr_cls:
mock_driver = mock.MagicMock()
@ -1210,8 +1186,8 @@ class TestDeviceManager(base.BaseTestCase):
plugin = mock.Mock()
plugin.get_dhcp_port.return_value = fake_port
dh = dhcp_agent.DeviceManager(cfg.CONF, plugin)
dh.get_interface_name(fake_network, fake_port)
dh = dhcp.DeviceManager(cfg.CONF, cfg.CONF.root_helper, plugin)
dh.get_interface_name(fake_net, fake_port)
dvr_cls.assert_called_once_with(cfg.CONF)
mock_driver.assert_has_calls(
@ -1220,8 +1196,9 @@ class TestDeviceManager(base.BaseTestCase):
self.assertEqual(len(plugin.mock_calls), 0)
def test_get_device_id(self):
fake_network = FakeModel('12345678-1234-5678-1234567890ab',
tenant_id='aaaaaaaa-aaaa-aaaa-aaaaaaaaaaaa')
fake_net = dhcp.NetModel(True,
dict(id='12345678-1234-5678-1234567890ab',
tenant_id='aaaaaaaa-aaaa-aaaa-aaaaaaaaaaaa'))
expected = ('dhcp1ae5f96c-c527-5079-82ea-371a01645457-12345678-1234-'
'5678-1234567890ab')
@ -1230,12 +1207,12 @@ class TestDeviceManager(base.BaseTestCase):
uuid5.return_value = '1ae5f96c-c527-5079-82ea-371a01645457'
get_host.return_value = 'localhost'
dh = dhcp_agent.DeviceManager(cfg.CONF, None)
dh = dhcp.DeviceManager(cfg.CONF, cfg.CONF.root_helper, None)
uuid5.called_once_with(uuid.NAMESPACE_DNS, 'localhost')
self.assertEqual(dh.get_device_id(fake_network), expected)
self.assertEqual(dh.get_device_id(fake_net), expected)
def _get_device_manager_with_mock_device(self, conf, device):
dh = dhcp_agent.DeviceManager(conf, None)
dh = dhcp.DeviceManager(conf, cfg.CONF.root_helper, None)
dh._get_device = mock.Mock(return_value=device)
return dh
@ -1243,7 +1220,7 @@ class TestDeviceManager(base.BaseTestCase):
# Try with namespaces and no metadata network
cfg.CONF.set_override('use_namespaces', True)
cfg.CONF.set_override('enable_metadata_network', False)
dh = dhcp_agent.DeviceManager(cfg.CONF, None)
dh = dhcp.DeviceManager(cfg.CONF, cfg.CONF.root_helper, None)
dh._set_default_route = mock.Mock()
dh.update(True)
@ -1253,7 +1230,7 @@ class TestDeviceManager(base.BaseTestCase):
# No namespaces, shouldn't set default route.
cfg.CONF.set_override('use_namespaces', False)
cfg.CONF.set_override('enable_metadata_network', False)
dh = dhcp_agent.DeviceManager(cfg.CONF, None)
dh = dhcp.DeviceManager(cfg.CONF, cfg.CONF.root_helper, None)
dh._set_default_route = mock.Mock()
dh.update(FakeV4Network())
@ -1263,7 +1240,7 @@ class TestDeviceManager(base.BaseTestCase):
# Meta data network enabled, don't interfere with its gateway.
cfg.CONF.set_override('use_namespaces', True)
cfg.CONF.set_override('enable_metadata_network', True)
dh = dhcp_agent.DeviceManager(cfg.CONF, None)
dh = dhcp.DeviceManager(cfg.CONF, cfg.CONF.root_helper, None)
dh._set_default_route = mock.Mock()
dh.update(FakeV4Network())
@ -1273,7 +1250,7 @@ class TestDeviceManager(base.BaseTestCase):
# For completeness
cfg.CONF.set_override('use_namespaces', False)
cfg.CONF.set_override('enable_metadata_network', True)
dh = dhcp_agent.DeviceManager(cfg.CONF, None)
dh = dhcp.DeviceManager(cfg.CONF, cfg.CONF.root_helper, None)
dh._set_default_route = mock.Mock()
dh.update(FakeV4Network())
@ -1386,24 +1363,38 @@ class TestDictModel(base.BaseTestCase):
def test_basic_dict(self):
d = dict(a=1, b=2)
m = dhcp_agent.DictModel(d)
m = dhcp.DictModel(d)
self.assertEqual(m.a, 1)
self.assertEqual(m.b, 2)
def test_dict_has_sub_dict(self):
d = dict(a=dict(b=2))
m = dhcp_agent.DictModel(d)
m = dhcp.DictModel(d)
self.assertEqual(m.a.b, 2)
def test_dict_contains_list(self):
d = dict(a=[1, 2])
m = dhcp_agent.DictModel(d)
m = dhcp.DictModel(d)
self.assertEqual(m.a, [1, 2])
def test_dict_contains_list_of_dicts(self):
d = dict(a=[dict(b=2), dict(c=3)])
m = dhcp_agent.DictModel(d)
m = dhcp.DictModel(d)
self.assertEqual(m.a[0].b, 2)
self.assertEqual(m.a[1].c, 3)
class TestNetModel(base.BaseTestCase):
def test_ns_name(self):
network = dhcp.NetModel(True, {'id': 'foo'})
self.assertEqual(network.namespace, 'qdhcp-foo')
def test_ns_name_false_namespace(self):
network = dhcp.NetModel(False, {'id': 'foo'})
self.assertIsNone(network.namespace)
def test_ns_name_none_namespace(self):
network = dhcp.NetModel(None, {'id': 'foo'})
self.assertIsNone(network.namespace)

130
neutron/tests/unit/test_linux_dhcp.py
View File

@ -134,18 +134,21 @@ class FakeDualNetwork:
id = 'cccccccc-cccc-cccc-cccc-cccccccccccc'
subnets = [FakeV4Subnet(), FakeV6Subnet()]
ports = [FakePort1(), FakePort2(), FakePort3()]
namespace = 'qdhcp-ns'
class FakeDualNetworkGatewayRoute:
id = 'cccccccc-cccc-cccc-cccc-cccccccccccc'
subnets = [FakeV4SubnetGatewayRoute(), FakeV6Subnet()]
ports = [FakePort1(), FakePort2(), FakePort3()]
namespace = 'qdhcp-ns'
class FakeDualNetworkSingleDHCP:
id = 'cccccccc-cccc-cccc-cccc-cccccccccccc'
subnets = [FakeV4Subnet(), FakeV4SubnetNoDHCP()]
ports = [FakePort1(), FakePort2(), FakePort3()]
namespace = 'qdhcp-ns'
class FakeV4NoGatewayNetwork:
@ -154,46 +157,6 @@ class FakeV4NoGatewayNetwork:
ports = [FakePort1()]
class TestDhcpBase(base.BaseTestCase):
def test_existing_dhcp_networks_abstract_error(self):
self.assertRaises(NotImplementedError,
dhcp.DhcpBase.existing_dhcp_networks,
None, None)
def test_check_version_abstract_error(self):
self.assertRaises(NotImplementedError,
dhcp.DhcpBase.check_version)
def test_base_abc_error(self):
self.assertRaises(TypeError, dhcp.DhcpBase, None)
def test_restart(self):
class SubClass(dhcp.DhcpBase):
def __init__(self):
dhcp.DhcpBase.__init__(self, None, None, None)
self.called = []
def enable(self):
self.called.append('enable')
def disable(self, retain_port=False):
self.called.append('disable %s' % retain_port)
def reload_allocations(self):
pass
def release_lease(self):
pass
@property
def active(self):
return True
c = SubClass()
c.restart()
self.assertEqual(c.called, ['disable True', 'enable'])
class LocalChild(dhcp.DhcpLocalProcess):
PORTS = {4: [4], 6: [6]}
@ -223,6 +186,9 @@ class TestBase(base.BaseTestCase):
self.conf = config.setup_conf()
self.conf.register_opts(base_config.core_opts)
self.conf.register_opts(dhcp.OPTS)
instance = mock.patch("neutron.agent.linux.dhcp.DeviceManager")
self.mock_mgr = instance.start()
self.addCleanup(self.mock_mgr.stop)
self.conf.register_opt(cfg.BoolOpt('enable_isolated_metadata',
default=True))
self.conf(args=args)
@ -237,6 +203,47 @@ class TestBase(base.BaseTestCase):
self.execute = self.execute_p.start()
class TestDhcpBase(TestBase):
def test_existing_dhcp_networks_abstract_error(self):
self.assertRaises(NotImplementedError,
dhcp.DhcpBase.existing_dhcp_networks,
None, None)
def test_check_version_abstract_error(self):
self.assertRaises(NotImplementedError,
dhcp.DhcpBase.check_version)
def test_base_abc_error(self):
self.assertRaises(TypeError, dhcp.DhcpBase, None)
def test_restart(self):
class SubClass(dhcp.DhcpBase):
def __init__(self):
dhcp.DhcpBase.__init__(self, cfg.CONF, FakeV4Network(), None)
self.called = []
def enable(self):
self.called.append('enable')
def disable(self, retain_port=False):
self.called.append('disable %s' % retain_port)
def reload_allocations(self):
pass
def release_lease(self):
pass
@property
def active(self):
return True
c = SubClass()
c.restart()
self.assertEqual(c.called, ['disable True', 'enable'])
class TestDhcpLocalProcess(TestBase):
def test_active(self):
dummy_cmd_line = 'aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa'
@ -285,18 +292,14 @@ class TestDhcpLocalProcess(TestBase):
self.assertTrue(makedirs.called)
def test_enable_already_active(self):
delegate = mock.Mock()
delegate.setup.return_value = 'tap0'
with mock.patch.object(LocalChild, 'active') as patched:
patched.__get__ = mock.Mock(return_value=True)
lp = LocalChild(self.conf, FakeV4Network(),
device_delegate=delegate)
lp = LocalChild(self.conf, FakeV4Network())
lp.enable()
self.assertEqual(lp.called, ['restart'])
def test_enable(self):
delegate = mock.Mock(return_value='tap0')
attrs_to_mock = dict(
[(a, mock.DEFAULT) for a in
['active', 'get_conf_file_name', 'interface_name']]
@ -307,12 +310,12 @@ class TestDhcpLocalProcess(TestBase):
mocks['get_conf_file_name'].return_value = '/dir'
mocks['interface_name'].__set__ = mock.Mock()
lp = LocalChild(self.conf,
FakeDualNetwork(),
device_delegate=delegate)
FakeDualNetwork())
lp.enable()
delegate.assert_has_calls(
[mock.call.setup(mock.ANY, reuse_existing=True)])
self.mock_mgr.assert_has_calls(
[mock.call(self.conf, 'sudo', None),
mock.call().setup(mock.ANY, reuse_existing=True)])
self.assertEqual(lp.called, ['spawn'])
self.assertTrue(mocks['interface_name'].__set__.called)
@ -345,34 +348,30 @@ class TestDhcpLocalProcess(TestBase):
def test_disable_retain_port(self):
attrs_to_mock = dict([(a, mock.DEFAULT) for a in
['active', 'interface_name', 'pid']])
delegate = mock.Mock()
network = FakeDualNetwork()
with mock.patch.multiple(LocalChild, **attrs_to_mock) as mocks:
mocks['active'].__get__ = mock.Mock(return_value=True)
mocks['pid'].__get__ = mock.Mock(return_value=5)
mocks['interface_name'].__get__ = mock.Mock(return_value='tap0')
lp = LocalChild(self.conf, network, device_delegate=delegate,
namespace='qdhcp-ns')
lp = LocalChild(self.conf, network)
lp.disable(retain_port=True)
self.assertFalse(delegate.called)
exp_args = ['kill', '-9', 5]
self.execute.assert_called_once_with(exp_args, 'sudo')
exp_args = ['kill', '-9', 5]
self.execute.assert_called_once_with(exp_args, 'sudo')
def test_disable(self):
attrs_to_mock = dict([(a, mock.DEFAULT) for a in
['active', 'interface_name', 'pid']])
delegate = mock.Mock()
network = FakeDualNetwork()
with mock.patch.multiple(LocalChild, **attrs_to_mock) as mocks:
mocks['active'].__get__ = mock.Mock(return_value=True)
mocks['pid'].__get__ = mock.Mock(return_value=5)
mocks['interface_name'].__get__ = mock.Mock(return_value='tap0')
lp = LocalChild(self.conf, network, device_delegate=delegate,
namespace='qdhcp-ns')
lp = LocalChild(self.conf, network)
lp.disable()
delegate.assert_has_calls([mock.call.destroy(network, 'tap0')])
self.mock_mgr.assert_has_calls([mock.call(self.conf, 'sudo', None),
mock.call().destroy(network, 'tap0')])
exp_args = ['kill', '-9', 5]
self.execute.assert_called_once_with(exp_args, 'sudo')
@ -451,8 +450,6 @@ class TestDnsmasq(TestBase):
expected.extend(extra_options)
self.execute.return_value = ('', '')
delegate = mock.Mock()
delegate.get_interface_name.return_value = 'tap0'
attrs_to_mock = dict(
[(a, mock.DEFAULT) for a in
@ -469,8 +466,6 @@ class TestDnsmasq(TestBase):
with mock.patch.object(dhcp.sys, 'argv') as argv:
argv.__getitem__.side_effect = fake_argv
dm = dhcp.Dnsmasq(self.conf, FakeDualNetwork(),
device_delegate=delegate,
namespace='qdhcp-ns',
version=float(2.59))
dm.spawn_process()
self.assertTrue(mocks['_output_opts_file'].called)
@ -584,8 +579,7 @@ tag:tag0,option:router""".lstrip()
self.safe.assert_called_once_with('/foo/opts', expected)
def test_release_lease(self):
dm = dhcp.Dnsmasq(self.conf, FakeDualNetwork(), namespace='qdhcp-ns',
version=float(2.59))
dm = dhcp.Dnsmasq(self.conf, FakeDualNetwork(), version=float(2.59))
dm.release_lease(mac_address=FakePort2.mac_address,
removed_ips=[FakePort2.fixed_ips[0].ip_address])
exp_args = ['ip', 'netns', 'exec', 'qdhcp-ns', 'dhcp_release',
@ -628,7 +622,6 @@ tag:tag1,249,%s,%s""".lstrip() % (fake_v6,
with mock.patch.object(dhcp.Dnsmasq, 'pid') as pid:
pid.__get__ = mock.Mock(return_value=5)
dm = dhcp.Dnsmasq(self.conf, FakeDualNetwork(),
namespace='qdhcp-ns',
version=float(2.59))
method_name = '_make_subnet_interface_ip_map'
@ -675,7 +668,7 @@ tag:tag1,249,%s,%s""".lstrip() % (fake_v6,
with mock.patch.object(dhcp.Dnsmasq, 'pid') as pid:
pid.__get__ = mock.Mock(return_value=5)
dm = dhcp.Dnsmasq(self.conf, FakeDualNetwork(),
namespace='qdhcp-ns', version=float(2.59))
version=float(2.59))
method_name = '_make_subnet_interface_ip_map'
with mock.patch.object(dhcp.Dnsmasq, method_name) as ip_map:
@ -694,8 +687,7 @@ tag:tag1,249,%s,%s""".lstrip() % (fake_v6,
]
dm = dhcp.Dnsmasq(self.conf,
FakeDualNetwork(),
namespace='qdhcp-ns')
FakeDualNetwork())
self.assertEqual(
dm._make_subnet_interface_ip_map(),

4
neutron/tests/unit/test_linux_interface.py
View File

@ -18,7 +18,7 @@
import mock
from neutron.agent.common import config
from neutron.agent.dhcp_agent import DeviceManager
from neutron.agent.linux import dhcp
from neutron.agent.linux import interface
from neutron.agent.linux import ip_lib
from neutron.agent.linux import utils
@ -330,7 +330,7 @@ class TestBridgeInterfaceDriver(TestBase):
class TestMetaInterfaceDriver(TestBase):
def setUp(self):
super(TestMetaInterfaceDriver, self).setUp()
self.conf.register_opts(DeviceManager.OPTS)
self.conf.register_opts(dhcp.OPTS)
self.client_cls_p = mock.patch('neutronclient.v2_0.client.Client')
client_cls = self.client_cls_p.start()
self.addCleanup(self.client_cls_p.stop)