1005 lines
43 KiB
Python
Executable File
1005 lines
43 KiB
Python
Executable File
#!/usr/bin/env python
|
|
# vim: tabstop=4 shiftwidth=4 softtabstop=4
|
|
#
|
|
# Copyright 2012 Cisco Systems, Inc.
|
|
# All Rights Reserved.
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License"); you may
|
|
# not use this file except in compliance with the License. You may obtain
|
|
# a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
# License for the specific language governing permissions and limitations
|
|
# under the License.
|
|
#
|
|
#
|
|
# Performs per host Linux Bridge configuration for Neutron.
|
|
# Based on the structure of the OpenVSwitch agent in the
|
|
# Neutron OpenVSwitch Plugin.
|
|
# @author: Sumit Naiksatam, Cisco Systems, Inc.
|
|
|
|
import distutils.version as dist_version
|
|
import os
|
|
import platform
|
|
import sys
|
|
import time
|
|
|
|
import eventlet
|
|
from oslo.config import cfg
|
|
import pyudev
|
|
|
|
from neutron.agent import l2population_rpc as l2pop_rpc
|
|
from neutron.agent.linux import ip_lib
|
|
from neutron.agent.linux import utils
|
|
from neutron.agent import rpc as agent_rpc
|
|
from neutron.agent import securitygroups_rpc as sg_rpc
|
|
from neutron.common import config as logging_config
|
|
from neutron.common import constants
|
|
from neutron.common import topics
|
|
from neutron.common import utils as q_utils
|
|
from neutron import context
|
|
from neutron.openstack.common import log as logging
|
|
from neutron.openstack.common import loopingcall
|
|
from neutron.openstack.common.rpc import common as rpc_common
|
|
from neutron.openstack.common.rpc import dispatcher
|
|
from neutron.plugins.common import constants as p_const
|
|
from neutron.plugins.linuxbridge.common import config # noqa
|
|
from neutron.plugins.linuxbridge.common import constants as lconst
|
|
|
|
|
|
LOG = logging.getLogger(__name__)
|
|
|
|
BRIDGE_NAME_PREFIX = "brq"
|
|
TAP_INTERFACE_PREFIX = "tap"
|
|
BRIDGE_FS = "/sys/devices/virtual/net/"
|
|
BRIDGE_NAME_PLACEHOLDER = "bridge_name"
|
|
BRIDGE_INTERFACES_FS = BRIDGE_FS + BRIDGE_NAME_PLACEHOLDER + "/brif/"
|
|
DEVICE_NAME_PLACEHOLDER = "device_name"
|
|
BRIDGE_PORT_FS_FOR_DEVICE = BRIDGE_FS + DEVICE_NAME_PLACEHOLDER + "/brport"
|
|
VXLAN_INTERFACE_PREFIX = "vxlan-"
|
|
|
|
|
|
class NetworkSegment:
|
|
def __init__(self, network_type, physical_network, segmentation_id):
|
|
self.network_type = network_type
|
|
self.physical_network = physical_network
|
|
self.segmentation_id = segmentation_id
|
|
|
|
|
|
class LinuxBridgeManager:
|
|
def __init__(self, interface_mappings, root_helper):
|
|
self.interface_mappings = interface_mappings
|
|
self.root_helper = root_helper
|
|
self.ip = ip_lib.IPWrapper(self.root_helper)
|
|
# VXLAN related parameters:
|
|
self.local_ip = cfg.CONF.VXLAN.local_ip
|
|
self.vxlan_mode = lconst.VXLAN_NONE
|
|
if cfg.CONF.VXLAN.enable_vxlan:
|
|
self.local_int = self.get_interface_by_ip(self.local_ip)
|
|
if self.local_int:
|
|
self.check_vxlan_support()
|
|
else:
|
|
LOG.warning(_('VXLAN is enabled, a valid local_ip '
|
|
'must be provided'))
|
|
# Store network mapping to segments
|
|
self.network_map = {}
|
|
|
|
self.udev = pyudev.Context()
|
|
monitor = pyudev.Monitor.from_netlink(self.udev)
|
|
monitor.filter_by('net')
|
|
|
|
def device_exists(self, device):
|
|
"""Check if ethernet device exists."""
|
|
try:
|
|
utils.execute(['ip', 'link', 'show', 'dev', device],
|
|
root_helper=self.root_helper)
|
|
except RuntimeError:
|
|
return False
|
|
return True
|
|
|
|
def interface_exists_on_bridge(self, bridge, interface):
|
|
directory = '/sys/class/net/%s/brif' % bridge
|
|
for filename in os.listdir(directory):
|
|
if filename == interface:
|
|
return True
|
|
return False
|
|
|
|
def get_bridge_name(self, network_id):
|
|
if not network_id:
|
|
LOG.warning(_("Invalid Network ID, will lead to incorrect bridge"
|
|
"name"))
|
|
bridge_name = BRIDGE_NAME_PREFIX + network_id[0:11]
|
|
return bridge_name
|
|
|
|
def get_subinterface_name(self, physical_interface, vlan_id):
|
|
if not vlan_id:
|
|
LOG.warning(_("Invalid VLAN ID, will lead to incorrect "
|
|
"subinterface name"))
|
|
subinterface_name = '%s.%s' % (physical_interface, vlan_id)
|
|
return subinterface_name
|
|
|
|
def get_tap_device_name(self, interface_id):
|
|
if not interface_id:
|
|
LOG.warning(_("Invalid Interface ID, will lead to incorrect "
|
|
"tap device name"))
|
|
tap_device_name = TAP_INTERFACE_PREFIX + interface_id[0:11]
|
|
return tap_device_name
|
|
|
|
def get_vxlan_device_name(self, segmentation_id):
|
|
if 0 <= int(segmentation_id) <= constants.MAX_VXLAN_VNI:
|
|
return VXLAN_INTERFACE_PREFIX + str(segmentation_id)
|
|
else:
|
|
LOG.warning(_("Invalid Segmentation ID: %s, will lead to "
|
|
"incorrect vxlan device name"), segmentation_id)
|
|
|
|
def get_all_neutron_bridges(self):
|
|
neutron_bridge_list = []
|
|
bridge_list = os.listdir(BRIDGE_FS)
|
|
for bridge in bridge_list:
|
|
if bridge.startswith(BRIDGE_NAME_PREFIX):
|
|
neutron_bridge_list.append(bridge)
|
|
return neutron_bridge_list
|
|
|
|
def get_interfaces_on_bridge(self, bridge_name):
|
|
if self.device_exists(bridge_name):
|
|
bridge_interface_path = BRIDGE_INTERFACES_FS.replace(
|
|
BRIDGE_NAME_PLACEHOLDER, bridge_name)
|
|
return os.listdir(bridge_interface_path)
|
|
|
|
def get_tap_devices_count(self, bridge_name):
|
|
bridge_interface_path = BRIDGE_INTERFACES_FS.replace(
|
|
BRIDGE_NAME_PLACEHOLDER, bridge_name)
|
|
try:
|
|
if_list = os.listdir(bridge_interface_path)
|
|
return len([interface for interface in if_list if
|
|
interface.startswith(TAP_INTERFACE_PREFIX)])
|
|
except OSError:
|
|
return 0
|
|
|
|
def get_interface_by_ip(self, ip):
|
|
for device in self.ip.get_devices():
|
|
if device.addr.list(to=ip):
|
|
return device.name
|
|
|
|
def get_bridge_for_tap_device(self, tap_device_name):
|
|
bridges = self.get_all_neutron_bridges()
|
|
for bridge in bridges:
|
|
interfaces = self.get_interfaces_on_bridge(bridge)
|
|
if tap_device_name in interfaces:
|
|
return bridge
|
|
|
|
return None
|
|
|
|
def is_device_on_bridge(self, device_name):
|
|
if not device_name:
|
|
return False
|
|
else:
|
|
bridge_port_path = BRIDGE_PORT_FS_FOR_DEVICE.replace(
|
|
DEVICE_NAME_PLACEHOLDER, device_name)
|
|
return os.path.exists(bridge_port_path)
|
|
|
|
def ensure_vlan_bridge(self, network_id, physical_interface, vlan_id):
|
|
"""Create a vlan and bridge unless they already exist."""
|
|
interface = self.ensure_vlan(physical_interface, vlan_id)
|
|
bridge_name = self.get_bridge_name(network_id)
|
|
ips, gateway = self.get_interface_details(interface)
|
|
if self.ensure_bridge(bridge_name, interface, ips, gateway):
|
|
return interface
|
|
|
|
def ensure_vxlan_bridge(self, network_id, segmentation_id):
|
|
"""Create a vxlan and bridge unless they already exist."""
|
|
interface = self.ensure_vxlan(segmentation_id)
|
|
if not interface:
|
|
LOG.error(_("Failed creating vxlan interface for "
|
|
"%(segmentation_id)s"),
|
|
{segmentation_id: segmentation_id})
|
|
return
|
|
bridge_name = self.get_bridge_name(network_id)
|
|
self.ensure_bridge(bridge_name, interface)
|
|
return interface
|
|
|
|
def get_interface_details(self, interface):
|
|
device = self.ip.device(interface)
|
|
ips = device.addr.list(scope='global')
|
|
|
|
# Update default gateway if necessary
|
|
gateway = device.route.get_gateway(scope='global')
|
|
return ips, gateway
|
|
|
|
def ensure_flat_bridge(self, network_id, physical_interface):
|
|
"""Create a non-vlan bridge unless it already exists."""
|
|
bridge_name = self.get_bridge_name(network_id)
|
|
ips, gateway = self.get_interface_details(physical_interface)
|
|
if self.ensure_bridge(bridge_name, physical_interface, ips, gateway):
|
|
return physical_interface
|
|
|
|
def ensure_local_bridge(self, network_id):
|
|
"""Create a local bridge unless it already exists."""
|
|
bridge_name = self.get_bridge_name(network_id)
|
|
return self.ensure_bridge(bridge_name)
|
|
|
|
def ensure_vlan(self, physical_interface, vlan_id):
|
|
"""Create a vlan unless it already exists."""
|
|
interface = self.get_subinterface_name(physical_interface, vlan_id)
|
|
if not self.device_exists(interface):
|
|
LOG.debug(_("Creating subinterface %(interface)s for "
|
|
"VLAN %(vlan_id)s on interface "
|
|
"%(physical_interface)s"),
|
|
{'interface': interface, 'vlan_id': vlan_id,
|
|
'physical_interface': physical_interface})
|
|
if utils.execute(['ip', 'link', 'add', 'link',
|
|
physical_interface,
|
|
'name', interface, 'type', 'vlan', 'id',
|
|
vlan_id], root_helper=self.root_helper):
|
|
return
|
|
if utils.execute(['ip', 'link', 'set',
|
|
interface, 'up'], root_helper=self.root_helper):
|
|
return
|
|
LOG.debug(_("Done creating subinterface %s"), interface)
|
|
return interface
|
|
|
|
def ensure_vxlan(self, segmentation_id):
|
|
"""Create a vxlan unless it already exists."""
|
|
interface = self.get_vxlan_device_name(segmentation_id)
|
|
if not self.device_exists(interface):
|
|
LOG.debug(_("Creating vxlan interface %(interface)s for "
|
|
"VNI %(segmentation_id)s"),
|
|
{'interface': interface,
|
|
'segmentation_id': segmentation_id})
|
|
args = {'dev': self.local_int}
|
|
if self.vxlan_mode == lconst.VXLAN_MCAST:
|
|
args['group'] = cfg.CONF.VXLAN.vxlan_group
|
|
if cfg.CONF.VXLAN.ttl:
|
|
args['ttl'] = cfg.CONF.VXLAN.ttl
|
|
if cfg.CONF.VXLAN.tos:
|
|
args['tos'] = cfg.CONF.VXLAN.tos
|
|
if cfg.CONF.VXLAN.l2_population:
|
|
args['proxy'] = True
|
|
int_vxlan = self.ip.add_vxlan(interface, segmentation_id, **args)
|
|
int_vxlan.link.set_up()
|
|
LOG.debug(_("Done creating vxlan interface %s"), interface)
|
|
return interface
|
|
|
|
def update_interface_ip_details(self, destination, source, ips,
|
|
gateway):
|
|
if ips or gateway:
|
|
dst_device = self.ip.device(destination)
|
|
src_device = self.ip.device(source)
|
|
|
|
# Append IP's to bridge if necessary
|
|
if ips:
|
|
for ip in ips:
|
|
dst_device.addr.add(ip_version=ip['ip_version'],
|
|
cidr=ip['cidr'],
|
|
broadcast=ip['broadcast'])
|
|
|
|
if gateway:
|
|
# Ensure that the gateway can be updated by changing the metric
|
|
metric = 100
|
|
if 'metric' in gateway:
|
|
metric = gateway['metric'] - 1
|
|
dst_device.route.add_gateway(gateway=gateway['gateway'],
|
|
metric=metric)
|
|
src_device.route.delete_gateway(gateway=gateway['gateway'])
|
|
|
|
# Remove IP's from interface
|
|
if ips:
|
|
for ip in ips:
|
|
src_device.addr.delete(ip_version=ip['ip_version'],
|
|
cidr=ip['cidr'])
|
|
|
|
def ensure_bridge(self, bridge_name, interface=None, ips=None,
|
|
gateway=None):
|
|
"""Create a bridge unless it already exists."""
|
|
if not self.device_exists(bridge_name):
|
|
LOG.debug(_("Starting bridge %(bridge_name)s for subinterface "
|
|
"%(interface)s"),
|
|
{'bridge_name': bridge_name, 'interface': interface})
|
|
if utils.execute(['brctl', 'addbr', bridge_name],
|
|
root_helper=self.root_helper):
|
|
return
|
|
if utils.execute(['brctl', 'setfd', bridge_name,
|
|
str(0)], root_helper=self.root_helper):
|
|
return
|
|
if utils.execute(['brctl', 'stp', bridge_name,
|
|
'off'], root_helper=self.root_helper):
|
|
return
|
|
if utils.execute(['ip', 'link', 'set', bridge_name,
|
|
'up'], root_helper=self.root_helper):
|
|
return
|
|
LOG.debug(_("Done starting bridge %(bridge_name)s for "
|
|
"subinterface %(interface)s"),
|
|
{'bridge_name': bridge_name, 'interface': interface})
|
|
|
|
if not interface:
|
|
return bridge_name
|
|
|
|
# Update IP info if necessary
|
|
self.update_interface_ip_details(bridge_name, interface, ips, gateway)
|
|
|
|
# Check if the interface is part of the bridge
|
|
if not self.interface_exists_on_bridge(bridge_name, interface):
|
|
try:
|
|
# Check if the interface is not enslaved in another bridge
|
|
if self.is_device_on_bridge(interface):
|
|
bridge = self.get_bridge_for_tap_device(interface)
|
|
utils.execute(['brctl', 'delif', bridge, interface],
|
|
root_helper=self.root_helper)
|
|
|
|
utils.execute(['brctl', 'addif', bridge_name, interface],
|
|
root_helper=self.root_helper)
|
|
except Exception as e:
|
|
LOG.error(_("Unable to add %(interface)s to %(bridge_name)s! "
|
|
"Exception: %(e)s"),
|
|
{'interface': interface, 'bridge_name': bridge_name,
|
|
'e': e})
|
|
return
|
|
return bridge_name
|
|
|
|
def ensure_physical_in_bridge(self, network_id,
|
|
network_type,
|
|
physical_network,
|
|
segmentation_id):
|
|
if network_type == p_const.TYPE_VXLAN:
|
|
if self.vxlan_mode == lconst.VXLAN_NONE:
|
|
LOG.error(_("Unable to add vxlan interface for network %s"),
|
|
network_id)
|
|
return
|
|
return self.ensure_vxlan_bridge(network_id, segmentation_id)
|
|
|
|
physical_interface = self.interface_mappings.get(physical_network)
|
|
if not physical_interface:
|
|
LOG.error(_("No mapping for physical network %s"),
|
|
physical_network)
|
|
return
|
|
if network_type == p_const.TYPE_FLAT:
|
|
return self.ensure_flat_bridge(network_id, physical_interface)
|
|
elif network_type == p_const.TYPE_VLAN:
|
|
return self.ensure_vlan_bridge(network_id, physical_interface,
|
|
segmentation_id)
|
|
else:
|
|
LOG.error(_("Unknown network_type %(network_type)s for network "
|
|
"%(network_id)s."), {network_type: network_type,
|
|
network_id: network_id})
|
|
|
|
def add_tap_interface(self, network_id, network_type, physical_network,
|
|
segmentation_id, tap_device_name):
|
|
"""Add tap interface.
|
|
|
|
If a VIF has been plugged into a network, this function will
|
|
add the corresponding tap device to the relevant bridge.
|
|
"""
|
|
if not self.device_exists(tap_device_name):
|
|
LOG.debug(_("Tap device: %s does not exist on "
|
|
"this host, skipped"), tap_device_name)
|
|
return False
|
|
|
|
bridge_name = self.get_bridge_name(network_id)
|
|
if network_type == p_const.TYPE_LOCAL:
|
|
self.ensure_local_bridge(network_id)
|
|
elif not self.ensure_physical_in_bridge(network_id,
|
|
network_type,
|
|
physical_network,
|
|
segmentation_id):
|
|
return False
|
|
|
|
# Check if device needs to be added to bridge
|
|
tap_device_in_bridge = self.get_bridge_for_tap_device(tap_device_name)
|
|
if not tap_device_in_bridge:
|
|
data = {'tap_device_name': tap_device_name,
|
|
'bridge_name': bridge_name}
|
|
msg = _("Adding device %(tap_device_name)s to bridge "
|
|
"%(bridge_name)s") % data
|
|
LOG.debug(msg)
|
|
if utils.execute(['brctl', 'addif', bridge_name, tap_device_name],
|
|
root_helper=self.root_helper):
|
|
return False
|
|
else:
|
|
data = {'tap_device_name': tap_device_name,
|
|
'bridge_name': bridge_name}
|
|
msg = _("%(tap_device_name)s already exists on bridge "
|
|
"%(bridge_name)s") % data
|
|
LOG.debug(msg)
|
|
return True
|
|
|
|
def add_interface(self, network_id, network_type, physical_network,
|
|
segmentation_id, port_id):
|
|
self.network_map[network_id] = NetworkSegment(network_type,
|
|
physical_network,
|
|
segmentation_id)
|
|
tap_device_name = self.get_tap_device_name(port_id)
|
|
return self.add_tap_interface(network_id, network_type,
|
|
physical_network, segmentation_id,
|
|
tap_device_name)
|
|
|
|
def delete_vlan_bridge(self, bridge_name):
|
|
if self.device_exists(bridge_name):
|
|
interfaces_on_bridge = self.get_interfaces_on_bridge(bridge_name)
|
|
for interface in interfaces_on_bridge:
|
|
self.remove_interface(bridge_name, interface)
|
|
|
|
if interface.startswith(VXLAN_INTERFACE_PREFIX):
|
|
self.delete_vxlan(interface)
|
|
continue
|
|
|
|
for physical_interface in self.interface_mappings.itervalues():
|
|
if physical_interface == interface:
|
|
# This is a flat network => return IP's from bridge to
|
|
# interface
|
|
ips, gateway = self.get_interface_details(bridge_name)
|
|
self.update_interface_ip_details(interface,
|
|
bridge_name,
|
|
ips, gateway)
|
|
elif interface.startswith(physical_interface):
|
|
self.delete_vlan(interface)
|
|
|
|
LOG.debug(_("Deleting bridge %s"), bridge_name)
|
|
if utils.execute(['ip', 'link', 'set', bridge_name, 'down'],
|
|
root_helper=self.root_helper):
|
|
return
|
|
if utils.execute(['brctl', 'delbr', bridge_name],
|
|
root_helper=self.root_helper):
|
|
return
|
|
LOG.debug(_("Done deleting bridge %s"), bridge_name)
|
|
|
|
else:
|
|
LOG.error(_("Cannot delete bridge %s, does not exist"),
|
|
bridge_name)
|
|
|
|
def remove_empty_bridges(self):
|
|
for network_id in self.network_map.keys():
|
|
bridge_name = self.get_bridge_name(network_id)
|
|
if not self.get_tap_devices_count(bridge_name):
|
|
self.delete_vlan_bridge(bridge_name)
|
|
del self.network_map[network_id]
|
|
|
|
def remove_interface(self, bridge_name, interface_name):
|
|
if self.device_exists(bridge_name):
|
|
if not self.is_device_on_bridge(interface_name):
|
|
return True
|
|
LOG.debug(_("Removing device %(interface_name)s from bridge "
|
|
"%(bridge_name)s"),
|
|
{'interface_name': interface_name,
|
|
'bridge_name': bridge_name})
|
|
if utils.execute(['brctl', 'delif', bridge_name, interface_name],
|
|
root_helper=self.root_helper):
|
|
return False
|
|
LOG.debug(_("Done removing device %(interface_name)s from bridge "
|
|
"%(bridge_name)s"),
|
|
{'interface_name': interface_name,
|
|
'bridge_name': bridge_name})
|
|
return True
|
|
else:
|
|
LOG.debug(_("Cannot remove device %(interface_name)s bridge "
|
|
"%(bridge_name)s does not exist"),
|
|
{'interface_name': interface_name,
|
|
'bridge_name': bridge_name})
|
|
return False
|
|
|
|
def delete_vlan(self, interface):
|
|
if self.device_exists(interface):
|
|
LOG.debug(_("Deleting subinterface %s for vlan"), interface)
|
|
if utils.execute(['ip', 'link', 'set', interface, 'down'],
|
|
root_helper=self.root_helper):
|
|
return
|
|
if utils.execute(['ip', 'link', 'delete', interface],
|
|
root_helper=self.root_helper):
|
|
return
|
|
LOG.debug(_("Done deleting subinterface %s"), interface)
|
|
|
|
def delete_vxlan(self, interface):
|
|
if self.device_exists(interface):
|
|
LOG.debug(_("Deleting vxlan interface %s for vlan"),
|
|
interface)
|
|
int_vxlan = self.ip.device(interface)
|
|
int_vxlan.link.set_down()
|
|
int_vxlan.link.delete()
|
|
LOG.debug(_("Done deleting vxlan interface %s"), interface)
|
|
|
|
def update_devices(self, registered_devices):
|
|
devices = self.udev_get_tap_devices()
|
|
if devices == registered_devices:
|
|
return
|
|
added = devices - registered_devices
|
|
removed = registered_devices - devices
|
|
return {'current': devices,
|
|
'added': added,
|
|
'removed': removed}
|
|
|
|
def udev_get_tap_devices(self):
|
|
devices = set()
|
|
for device in self.udev.list_devices(subsystem='net'):
|
|
name = self.udev_get_name(device)
|
|
if self.is_tap_device(name):
|
|
devices.add(name)
|
|
return devices
|
|
|
|
def is_tap_device(self, name):
|
|
return name.startswith(TAP_INTERFACE_PREFIX)
|
|
|
|
def udev_get_name(self, device):
|
|
return device.sys_name
|
|
|
|
def check_vxlan_support(self):
|
|
kernel_version = dist_version.LooseVersion(platform.release())
|
|
if cfg.CONF.VXLAN.l2_population and (
|
|
kernel_version > dist_version.LooseVersion(
|
|
lconst.MIN_VXLAN_KVER[lconst.VXLAN_UCAST])) and (
|
|
ip_lib.iproute_arg_supported(['bridge', 'fdb'],
|
|
'append', self.root_helper)):
|
|
self.vxlan_mode = lconst.VXLAN_UCAST
|
|
elif (kernel_version > dist_version.LooseVersion(
|
|
lconst.MIN_VXLAN_KVER[lconst.VXLAN_MCAST])) and (
|
|
ip_lib.iproute_arg_supported(['ip', 'link', 'add',
|
|
'type', 'vxlan'], 'proxy',
|
|
self.root_helper)):
|
|
if cfg.CONF.VXLAN.vxlan_group:
|
|
self.vxlan_mode = lconst.VXLAN_MCAST
|
|
else:
|
|
self.vxlan_mode = lconst.VXLAN_NONE
|
|
LOG.warning(_('VXLAN muticast group must be provided in '
|
|
'vxlan_group option to enable VXLAN'))
|
|
else:
|
|
self.vxlan_mode = lconst.VXLAN_NONE
|
|
LOG.warning(_('Unable to use VXLAN, it requires at least 3.8 '
|
|
'linux kernel and iproute2 3.8'))
|
|
LOG.debug(_('Using %s VXLAN mode'), self.vxlan_mode)
|
|
|
|
def fdb_ip_entry_exists(self, mac, ip, interface):
|
|
entries = utils.execute(['ip', 'neigh', 'show', 'to', ip,
|
|
'dev', interface],
|
|
root_helper=self.root_helper)
|
|
return mac in entries
|
|
|
|
def fdb_bridge_entry_exists(self, mac, interface, agent_ip=None):
|
|
entries = utils.execute(['bridge', 'fdb', 'show', 'dev', interface],
|
|
root_helper=self.root_helper)
|
|
if not agent_ip:
|
|
return mac in entries
|
|
|
|
return (agent_ip in entries and mac in entries)
|
|
|
|
def add_fdb_ip_entry(self, mac, ip, interface):
|
|
utils.execute(['ip', 'neigh', 'add', ip, 'lladdr', mac,
|
|
'dev', interface, 'nud', 'permanent'],
|
|
root_helper=self.root_helper,
|
|
check_exit_code=False)
|
|
|
|
def remove_fdb_ip_entry(self, mac, ip, interface):
|
|
utils.execute(['ip', 'neigh', 'del', ip, 'lladdr', mac,
|
|
'dev', interface],
|
|
root_helper=self.root_helper,
|
|
check_exit_code=False)
|
|
|
|
def add_fdb_bridge_entry(self, mac, agent_ip, interface, operation="add"):
|
|
utils.execute(['bridge', 'fdb', operation, mac, 'dev', interface,
|
|
'dst', agent_ip],
|
|
root_helper=self.root_helper,
|
|
check_exit_code=False)
|
|
|
|
def remove_fdb_bridge_entry(self, mac, agent_ip, interface):
|
|
utils.execute(['bridge', 'fdb', 'del', mac, 'dev', interface,
|
|
'dst', agent_ip],
|
|
root_helper=self.root_helper,
|
|
check_exit_code=False)
|
|
|
|
def add_fdb_entries(self, agent_ip, ports, interface):
|
|
for mac, ip in ports:
|
|
if mac != constants.FLOODING_ENTRY[0]:
|
|
self.add_fdb_ip_entry(mac, ip, interface)
|
|
self.add_fdb_bridge_entry(mac, agent_ip, interface)
|
|
elif self.vxlan_mode == lconst.VXLAN_UCAST:
|
|
if self.fdb_bridge_entry_exists(mac, interface):
|
|
self.add_fdb_bridge_entry(mac, agent_ip, interface,
|
|
"append")
|
|
else:
|
|
self.add_fdb_bridge_entry(mac, agent_ip, interface)
|
|
|
|
def remove_fdb_entries(self, agent_ip, ports, interface):
|
|
for mac, ip in ports:
|
|
if mac != constants.FLOODING_ENTRY[0]:
|
|
self.remove_fdb_ip_entry(mac, ip, interface)
|
|
self.remove_fdb_bridge_entry(mac, agent_ip, interface)
|
|
elif self.vxlan_mode == lconst.VXLAN_UCAST:
|
|
self.remove_fdb_bridge_entry(mac, agent_ip, interface)
|
|
|
|
|
|
class LinuxBridgeRpcCallbacks(sg_rpc.SecurityGroupAgentRpcCallbackMixin,
|
|
l2pop_rpc.L2populationRpcCallBackMixin):
|
|
|
|
# Set RPC API version to 1.0 by default.
|
|
# history
|
|
# 1.1 Support Security Group RPC
|
|
RPC_API_VERSION = '1.1'
|
|
|
|
def __init__(self, context, agent):
|
|
self.context = context
|
|
self.agent = agent
|
|
self.sg_agent = agent
|
|
|
|
def network_delete(self, context, **kwargs):
|
|
LOG.debug(_("network_delete received"))
|
|
network_id = kwargs.get('network_id')
|
|
bridge_name = self.agent.br_mgr.get_bridge_name(network_id)
|
|
LOG.debug(_("Delete %s"), bridge_name)
|
|
self.agent.br_mgr.delete_vlan_bridge(bridge_name)
|
|
|
|
def port_update(self, context, **kwargs):
|
|
LOG.debug(_("port_update received"))
|
|
# Check port exists on node
|
|
port = kwargs.get('port')
|
|
tap_device_name = self.agent.br_mgr.get_tap_device_name(port['id'])
|
|
devices = self.agent.br_mgr.udev_get_tap_devices()
|
|
if tap_device_name not in devices:
|
|
return
|
|
|
|
if 'security_groups' in port:
|
|
self.sg_agent.refresh_firewall()
|
|
try:
|
|
if port['admin_state_up']:
|
|
network_type = kwargs.get('network_type')
|
|
if network_type:
|
|
segmentation_id = kwargs.get('segmentation_id')
|
|
else:
|
|
# compatibility with pre-Havana RPC vlan_id encoding
|
|
vlan_id = kwargs.get('vlan_id')
|
|
(network_type,
|
|
segmentation_id) = lconst.interpret_vlan_id(vlan_id)
|
|
physical_network = kwargs.get('physical_network')
|
|
# create the networking for the port
|
|
if self.agent.br_mgr.add_interface(port['network_id'],
|
|
network_type,
|
|
physical_network,
|
|
segmentation_id,
|
|
port['id']):
|
|
# update plugin about port status
|
|
self.agent.plugin_rpc.update_device_up(self.context,
|
|
tap_device_name,
|
|
self.agent.agent_id,
|
|
cfg.CONF.host)
|
|
else:
|
|
self.agent.plugin_rpc.update_device_down(
|
|
self.context,
|
|
tap_device_name,
|
|
self.agent.agent_id,
|
|
cfg.CONF.host
|
|
)
|
|
else:
|
|
bridge_name = self.agent.br_mgr.get_bridge_name(
|
|
port['network_id'])
|
|
self.agent.br_mgr.remove_interface(bridge_name,
|
|
tap_device_name)
|
|
# update plugin about port status
|
|
self.agent.plugin_rpc.update_device_down(self.context,
|
|
tap_device_name,
|
|
self.agent.agent_id,
|
|
cfg.CONF.host)
|
|
except rpc_common.Timeout:
|
|
LOG.error(_("RPC timeout while updating port %s"), port['id'])
|
|
|
|
def fdb_add(self, context, fdb_entries):
|
|
LOG.debug(_("fdb_add received"))
|
|
for network_id, values in fdb_entries.items():
|
|
segment = self.agent.br_mgr.network_map.get(network_id)
|
|
if not segment:
|
|
return
|
|
|
|
if segment.network_type != p_const.TYPE_VXLAN:
|
|
return
|
|
|
|
interface = self.agent.br_mgr.get_vxlan_device_name(
|
|
segment.segmentation_id)
|
|
|
|
agent_ports = values.get('ports')
|
|
for agent_ip, ports in agent_ports.items():
|
|
if agent_ip == self.agent.br_mgr.local_ip:
|
|
continue
|
|
|
|
self.agent.br_mgr.add_fdb_entries(agent_ip,
|
|
ports,
|
|
interface)
|
|
|
|
def fdb_remove(self, context, fdb_entries):
|
|
LOG.debug(_("fdb_remove received"))
|
|
for network_id, values in fdb_entries.items():
|
|
segment = self.agent.br_mgr.network_map.get(network_id)
|
|
if not segment:
|
|
return
|
|
|
|
if segment.network_type != p_const.TYPE_VXLAN:
|
|
return
|
|
|
|
interface = self.agent.br_mgr.get_vxlan_device_name(
|
|
segment.segmentation_id)
|
|
|
|
agent_ports = values.get('ports')
|
|
for agent_ip, ports in agent_ports.items():
|
|
if agent_ip == self.agent.br_mgr.local_ip:
|
|
continue
|
|
|
|
self.agent.br_mgr.remove_fdb_entries(agent_ip,
|
|
ports,
|
|
interface)
|
|
|
|
def _fdb_chg_ip(self, context, fdb_entries):
|
|
LOG.debug(_("update chg_ip received"))
|
|
for network_id, agent_ports in fdb_entries.items():
|
|
segment = self.agent.br_mgr.network_map.get(network_id)
|
|
if not segment:
|
|
return
|
|
|
|
if segment.network_type != p_const.TYPE_VXLAN:
|
|
return
|
|
|
|
interface = self.agent.br_mgr.get_vxlan_device_name(
|
|
segment.segmentation_id)
|
|
|
|
for agent_ip, state in agent_ports.items():
|
|
if agent_ip == self.agent.br_mgr.local_ip:
|
|
continue
|
|
|
|
after = state.get('after')
|
|
for mac, ip in after:
|
|
self.agent.br_mgr.add_fdb_ip_entry(mac, ip, interface)
|
|
|
|
before = state.get('before')
|
|
for mac, ip in before:
|
|
self.agent.br_mgr.remove_fdb_ip_entry(mac, ip, interface)
|
|
|
|
def fdb_update(self, context, fdb_entries):
|
|
LOG.debug(_("fdb_update received"))
|
|
for action, values in fdb_entries.items():
|
|
method = '_fdb_' + action
|
|
if not hasattr(self, method):
|
|
raise NotImplementedError()
|
|
|
|
getattr(self, method)(context, values)
|
|
|
|
def create_rpc_dispatcher(self):
|
|
'''Get the rpc dispatcher for this manager.
|
|
|
|
If a manager would like to set an rpc API version, or support more than
|
|
one class as the target of rpc messages, override this method.
|
|
'''
|
|
return dispatcher.RpcDispatcher([self])
|
|
|
|
|
|
class LinuxBridgePluginApi(agent_rpc.PluginApi,
|
|
sg_rpc.SecurityGroupServerRpcApiMixin):
|
|
pass
|
|
|
|
|
|
class LinuxBridgeNeutronAgentRPC(sg_rpc.SecurityGroupAgentRpcMixin):
|
|
|
|
def __init__(self, interface_mappings, polling_interval,
|
|
root_helper):
|
|
self.polling_interval = polling_interval
|
|
self.root_helper = root_helper
|
|
self.setup_linux_bridge(interface_mappings)
|
|
configurations = {'interface_mappings': interface_mappings}
|
|
if self.br_mgr.vxlan_mode != lconst.VXLAN_NONE:
|
|
configurations['tunneling_ip'] = self.br_mgr.local_ip
|
|
configurations['tunnel_types'] = [p_const.TYPE_VXLAN]
|
|
configurations['l2_population'] = cfg.CONF.VXLAN.l2_population
|
|
self.agent_state = {
|
|
'binary': 'neutron-linuxbridge-agent',
|
|
'host': cfg.CONF.host,
|
|
'topic': constants.L2_AGENT_TOPIC,
|
|
'configurations': configurations,
|
|
'agent_type': constants.AGENT_TYPE_LINUXBRIDGE,
|
|
'start_flag': True}
|
|
|
|
self.setup_rpc(interface_mappings.values())
|
|
self.init_firewall()
|
|
|
|
def _report_state(self):
|
|
try:
|
|
devices = len(self.br_mgr.udev_get_tap_devices())
|
|
self.agent_state.get('configurations')['devices'] = devices
|
|
self.state_rpc.report_state(self.context,
|
|
self.agent_state)
|
|
self.agent_state.pop('start_flag', None)
|
|
except Exception:
|
|
LOG.exception(_("Failed reporting state!"))
|
|
|
|
def setup_rpc(self, physical_interfaces):
|
|
if physical_interfaces:
|
|
mac = utils.get_interface_mac(physical_interfaces[0])
|
|
else:
|
|
devices = ip_lib.IPWrapper(self.root_helper).get_devices(True)
|
|
if devices:
|
|
mac = utils.get_interface_mac(devices[0].name)
|
|
else:
|
|
LOG.error(_("Unable to obtain MAC address for unique ID. "
|
|
"Agent terminated!"))
|
|
exit(1)
|
|
self.agent_id = '%s%s' % ('lb', (mac.replace(":", "")))
|
|
LOG.info(_("RPC agent_id: %s"), self.agent_id)
|
|
|
|
self.topic = topics.AGENT
|
|
self.plugin_rpc = LinuxBridgePluginApi(topics.PLUGIN)
|
|
self.state_rpc = agent_rpc.PluginReportStateAPI(topics.PLUGIN)
|
|
# RPC network init
|
|
self.context = context.get_admin_context_without_session()
|
|
# Handle updates from service
|
|
self.callbacks = LinuxBridgeRpcCallbacks(self.context,
|
|
self)
|
|
self.dispatcher = self.callbacks.create_rpc_dispatcher()
|
|
# Define the listening consumers for the agent
|
|
consumers = [[topics.PORT, topics.UPDATE],
|
|
[topics.NETWORK, topics.DELETE],
|
|
[topics.SECURITY_GROUP, topics.UPDATE]]
|
|
if cfg.CONF.VXLAN.l2_population:
|
|
consumers.append([topics.L2POPULATION,
|
|
topics.UPDATE, cfg.CONF.host])
|
|
self.connection = agent_rpc.create_consumers(self.dispatcher,
|
|
self.topic,
|
|
consumers)
|
|
report_interval = cfg.CONF.AGENT.report_interval
|
|
if report_interval:
|
|
heartbeat = loopingcall.FixedIntervalLoopingCall(
|
|
self._report_state)
|
|
heartbeat.start(interval=report_interval)
|
|
|
|
def setup_linux_bridge(self, interface_mappings):
|
|
self.br_mgr = LinuxBridgeManager(interface_mappings, self.root_helper)
|
|
|
|
def remove_port_binding(self, network_id, interface_id):
|
|
bridge_name = self.br_mgr.get_bridge_name(network_id)
|
|
tap_device_name = self.br_mgr.get_tap_device_name(interface_id)
|
|
return self.br_mgr.remove_interface(bridge_name, tap_device_name)
|
|
|
|
def process_network_devices(self, device_info):
|
|
resync_a = False
|
|
resync_b = False
|
|
if 'added' in device_info:
|
|
resync_a = self.treat_devices_added(device_info['added'])
|
|
if 'removed' in device_info:
|
|
resync_b = self.treat_devices_removed(device_info['removed'])
|
|
# If one of the above operations fails => resync with plugin
|
|
return (resync_a | resync_b)
|
|
|
|
def treat_devices_added(self, devices):
|
|
resync = False
|
|
self.prepare_devices_filter(devices)
|
|
for device in devices:
|
|
LOG.debug(_("Port %s added"), device)
|
|
try:
|
|
details = self.plugin_rpc.get_device_details(self.context,
|
|
device,
|
|
self.agent_id)
|
|
except Exception as e:
|
|
LOG.debug(_("Unable to get port details for "
|
|
"%(device)s: %(e)s"),
|
|
{'device': device, 'e': e})
|
|
resync = True
|
|
continue
|
|
if 'port_id' in details:
|
|
LOG.info(_("Port %(device)s updated. Details: %(details)s"),
|
|
{'device': device, 'details': details})
|
|
if details['admin_state_up']:
|
|
# create the networking for the port
|
|
network_type = details.get('network_type')
|
|
if network_type:
|
|
segmentation_id = details.get('segmentation_id')
|
|
else:
|
|
# compatibility with pre-Havana RPC vlan_id encoding
|
|
vlan_id = details.get('vlan_id')
|
|
(network_type,
|
|
segmentation_id) = lconst.interpret_vlan_id(vlan_id)
|
|
if self.br_mgr.add_interface(details['network_id'],
|
|
network_type,
|
|
details['physical_network'],
|
|
segmentation_id,
|
|
details['port_id']):
|
|
|
|
# update plugin about port status
|
|
self.plugin_rpc.update_device_up(self.context,
|
|
device,
|
|
self.agent_id,
|
|
cfg.CONF.host)
|
|
else:
|
|
self.plugin_rpc.update_device_down(self.context,
|
|
device,
|
|
self.agent_id,
|
|
cfg.CONF.host)
|
|
else:
|
|
self.remove_port_binding(details['network_id'],
|
|
details['port_id'])
|
|
else:
|
|
LOG.info(_("Device %s not defined on plugin"), device)
|
|
return resync
|
|
|
|
def treat_devices_removed(self, devices):
|
|
resync = False
|
|
self.remove_devices_filter(devices)
|
|
for device in devices:
|
|
LOG.info(_("Attachment %s removed"), device)
|
|
try:
|
|
details = self.plugin_rpc.update_device_down(self.context,
|
|
device,
|
|
self.agent_id,
|
|
cfg.CONF.host)
|
|
except Exception as e:
|
|
LOG.debug(_("port_removed failed for %(device)s: %(e)s"),
|
|
{'device': device, 'e': e})
|
|
resync = True
|
|
if details['exists']:
|
|
LOG.info(_("Port %s updated."), device)
|
|
else:
|
|
LOG.debug(_("Device %s not defined on plugin"), device)
|
|
self.br_mgr.remove_empty_bridges()
|
|
return resync
|
|
|
|
def daemon_loop(self):
|
|
sync = True
|
|
devices = set()
|
|
|
|
LOG.info(_("LinuxBridge Agent RPC Daemon Started!"))
|
|
|
|
while True:
|
|
start = time.time()
|
|
if sync:
|
|
LOG.info(_("Agent out of sync with plugin!"))
|
|
devices.clear()
|
|
sync = False
|
|
device_info = {}
|
|
try:
|
|
device_info = self.br_mgr.update_devices(devices)
|
|
except Exception:
|
|
LOG.exception(_("Update devices failed"))
|
|
sync = True
|
|
try:
|
|
# notify plugin about device deltas
|
|
if device_info:
|
|
LOG.debug(_("Agent loop has new devices!"))
|
|
# If treat devices fails - indicates must resync with
|
|
# plugin
|
|
sync = self.process_network_devices(device_info)
|
|
devices = device_info['current']
|
|
except Exception:
|
|
LOG.exception(_("Error in agent loop. Devices info: %s"),
|
|
device_info)
|
|
sync = True
|
|
# sleep till end of polling interval
|
|
elapsed = (time.time() - start)
|
|
if (elapsed < self.polling_interval):
|
|
time.sleep(self.polling_interval - elapsed)
|
|
else:
|
|
LOG.debug(_("Loop iteration exceeded interval "
|
|
"(%(polling_interval)s vs. %(elapsed)s)!"),
|
|
{'polling_interval': self.polling_interval,
|
|
'elapsed': elapsed})
|
|
|
|
|
|
def main():
|
|
eventlet.monkey_patch()
|
|
cfg.CONF(project='neutron')
|
|
|
|
logging_config.setup_logging(cfg.CONF)
|
|
try:
|
|
interface_mappings = q_utils.parse_mappings(
|
|
cfg.CONF.LINUX_BRIDGE.physical_interface_mappings)
|
|
except ValueError as e:
|
|
LOG.error(_("Parsing physical_interface_mappings failed: %s."
|
|
" Agent terminated!"), e)
|
|
sys.exit(1)
|
|
LOG.info(_("Interface mappings: %s"), interface_mappings)
|
|
|
|
polling_interval = cfg.CONF.AGENT.polling_interval
|
|
root_helper = cfg.CONF.AGENT.root_helper
|
|
agent = LinuxBridgeNeutronAgentRPC(interface_mappings,
|
|
polling_interval,
|
|
root_helper)
|
|
LOG.info(_("Agent initialized successfully, now running... "))
|
|
agent.daemon_loop()
|
|
sys.exit(0)
|
|
|
|
|
|
if __name__ == "__main__":
|
|
main()
|