openstack/neutron
Code Issues Proposed changes
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a5244d6d44d2b66de27dc77efa7830fa657260be
neutron/neutron/plugins/ml2/drivers/openvswitch/agent/ovs_neutron_agent.py
LIU Yulong a5244d6d44 More accurate agent restart state transfer 
Ovs-agent can be very time-consuming in handling a large number
of ports. At this point, the ovs-agent status report may have
exceeded the set timeout value. Some flows updating operations
will not be triggerred. This results in flows loss during agent
restart, especially for hosts to hosts of vxlan tunnel flow.

This fix will let the ovs-agent explicitly, in the first rpc loop,
indicate that the status is restarted. Then l2pop will be required
to update fdb entries.

Closes-Bug: #1813703
Closes-Bug: #1813714
Closes-Bug: #1813715
Closes-Bug: #1794991
Closes-Bug: #1799178

Change-Id: I8edc2deb509216add1fb21e1893f1c17dda80961
2019-03-21 15:12:31 +00:00

2381 lines
109 KiB
Python
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# Copyright 2011 VMware, 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.
import base64
import collections
import functools
import hashlib
import signal
import sys
import time
import netaddr
from neutron_lib.agent import constants as agent_consts
from neutron_lib.agent import topics
from neutron_lib.api.definitions import portbindings
from neutron_lib.callbacks import events as callback_events
from neutron_lib.callbacks import registry
from neutron_lib.callbacks import resources as callback_resources
from neutron_lib import constants as n_const
from neutron_lib import context
from neutron_lib.placement import utils as place_utils
from neutron_lib.plugins import utils as plugin_utils
from neutron_lib.utils import helpers
from oslo_config import cfg
from oslo_log import log as logging
import oslo_messaging
from oslo_service import loopingcall
from oslo_service import systemd
from oslo_utils import netutils
from osprofiler import profiler
import six
from neutron._i18n import _
from neutron.agent.common import ip_lib
from neutron.agent.common import ovs_lib
from neutron.agent.common import polling
from neutron.agent.common import utils
from neutron.agent.l2 import l2_agent_extensions_manager as ext_manager
from neutron.agent.linux import xenapi_root_helper
from neutron.agent import rpc as agent_rpc
from neutron.agent import securitygroups_rpc as agent_sg_rpc
from neutron.api.rpc.callbacks import resources
from neutron.api.rpc.handlers import dvr_rpc
from neutron.api.rpc.handlers import securitygroups_rpc as sg_rpc
from neutron.common import config
from neutron.common import constants as c_const
from neutron.common import utils as n_utils
from neutron.conf.agent import common as agent_config
from neutron.conf.agent import xenapi_conf
from neutron.conf import service as service_conf
from neutron.plugins.ml2.drivers.agent import capabilities
from neutron.plugins.ml2.drivers.l2pop.rpc_manager import l2population_rpc
from neutron.plugins.ml2.drivers.openvswitch.agent.common \
import constants
from neutron.plugins.ml2.drivers.openvswitch.agent \
import ovs_agent_extension_api as ovs_ext_api
from neutron.plugins.ml2.drivers.openvswitch.agent \
import ovs_capabilities
from neutron.plugins.ml2.drivers.openvswitch.agent \
import ovs_dvr_neutron_agent
from neutron.plugins.ml2.drivers.openvswitch.agent import vlanmanager
LOG = logging.getLogger(__name__)
cfg.CONF.import_group('AGENT', 'neutron.plugins.ml2.drivers.openvswitch.'
'agent.common.config')
cfg.CONF.import_group('OVS', 'neutron.plugins.ml2.drivers.openvswitch.agent.'
'common.config')
class _mac_mydialect(netaddr.mac_unix):
word_fmt = '%.2x'
class OVSPluginApi(agent_rpc.CacheBackedPluginApi):
pass
def has_zero_prefixlen_address(ip_addresses):
return any(netaddr.IPNetwork(ip).prefixlen == 0 for ip in ip_addresses)
@profiler.trace_cls("rpc")
class OVSNeutronAgent(l2population_rpc.L2populationRpcCallBackTunnelMixin,
dvr_rpc.DVRAgentRpcCallbackMixin):
'''Implements OVS-based tunneling, VLANs and flat networks.
Two local bridges are created: an integration bridge (defaults to
'br-int') and a tunneling bridge (defaults to 'br-tun'). An
additional bridge is created for each physical network interface
used for VLANs and/or flat networks.
All VM VIFs are plugged into the integration bridge. VM VIFs on a
given virtual network share a common "local" VLAN (i.e. not
propagated externally). The VLAN id of this local VLAN is mapped
to the physical networking details realizing that virtual network.
For virtual networks realized as GRE tunnels, a Logical Switch
(LS) identifier is used to differentiate tenant traffic on
inter-HV tunnels. A mesh of tunnels is created to other
Hypervisors in the cloud. These tunnels originate and terminate on
the tunneling bridge of each hypervisor. Port patching is done to
connect local VLANs on the integration bridge to inter-hypervisor
tunnels on the tunnel bridge.
For each virtual network realized as a VLAN or flat network, a
veth or a pair of patch ports is used to connect the local VLAN on
the integration bridge with the physical network bridge, with flow
rules adding, modifying, or stripping VLAN tags as necessary.
'''
# history
# 1.0 Initial version
# 1.1 Support Security Group RPC
# 1.2 Support DVR (Distributed Virtual Router) RPC
# 1.3 Added param devices_to_update to security_groups_provider_updated
# 1.4 Added support for network_update
# 1.5 Added binding_activate and binding_deactivate
target = oslo_messaging.Target(version='1.5')
def __init__(self, bridge_classes, ext_manager, conf=None):
'''Constructor.
:param bridge_classes: a dict for bridge classes.
:param conf: an instance of ConfigOpts
'''
super(OVSNeutronAgent, self).__init__()
self.conf = conf or cfg.CONF
self.ovs = ovs_lib.BaseOVS()
self.ext_manager = ext_manager
agent_conf = self.conf.AGENT
ovs_conf = self.conf.OVS
self.fullsync = False
# init bridge classes with configured datapath type.
self.br_int_cls, self.br_phys_cls, self.br_tun_cls = (
functools.partial(bridge_classes[b],
datapath_type=ovs_conf.datapath_type)
for b in ('br_int', 'br_phys', 'br_tun'))
self.use_veth_interconnection = ovs_conf.use_veth_interconnection
self.veth_mtu = agent_conf.veth_mtu
self.available_local_vlans = set(six.moves.range(
n_const.MIN_VLAN_TAG, n_const.MAX_VLAN_TAG + 1))
self.tunnel_types = agent_conf.tunnel_types or []
self.l2_pop = agent_conf.l2_population
# TODO(ethuleau): Change ARP responder so it's not dependent on the
# ML2 l2 population mechanism driver.
self.enable_distributed_routing = agent_conf.enable_distributed_routing
self.arp_responder_enabled = agent_conf.arp_responder and self.l2_pop
host = self.conf.host
self.agent_id = 'ovs-agent-%s' % host
self.enable_tunneling = bool(self.tunnel_types)
# Validate agent configurations
self._check_agent_configurations()
# Keep track of int_br's device count for use by _report_state()
self.int_br_device_count = 0
self.int_br = self.br_int_cls(ovs_conf.integration_bridge)
self.setup_integration_br()
# Stores port update notifications for processing in main rpc loop
self.updated_ports = set()
# Stores port delete notifications
self.deleted_ports = set()
# Stores the port IDs whose binding has been deactivated
self.deactivated_bindings = set()
# Stores the port IDs whose binding has been activated
self.activated_bindings = set()
self.network_ports = collections.defaultdict(set)
# keeps association between ports and ofports to detect ofport change
self.vifname_to_ofport_map = {}
self.setup_rpc()
self.bridge_mappings = self._parse_bridge_mappings(
ovs_conf.bridge_mappings)
self.rp_bandwidths = place_utils.parse_rp_bandwidths(
ovs_conf.resource_provider_bandwidths)
br_set = set(six.itervalues(self.bridge_mappings))
n_utils.validate_rp_bandwidth(self.rp_bandwidths,
br_set)
self.rp_inventory_defaults = place_utils.parse_rp_inventory_defaults(
ovs_conf.resource_provider_inventory_defaults)
self.setup_physical_bridges(self.bridge_mappings)
self.vlan_manager = vlanmanager.LocalVlanManager()
self._reset_tunnel_ofports()
self.polling_interval = agent_conf.polling_interval
self.minimize_polling = agent_conf.minimize_polling
self.ovsdb_monitor_respawn_interval = (
agent_conf.ovsdb_monitor_respawn_interval or
constants.DEFAULT_OVSDBMON_RESPAWN)
self.local_ip = ovs_conf.local_ip
self.tunnel_count = 0
self.vxlan_udp_port = agent_conf.vxlan_udp_port
self.dont_fragment = agent_conf.dont_fragment
self.tunnel_csum = agent_conf.tunnel_csum
self.tos = ('inherit'
if agent_conf.dscp_inherit
else (int(agent_conf.dscp) << 2
if agent_conf.dscp
else None))
self.tun_br = None
self.patch_int_ofport = constants.OFPORT_INVALID
self.patch_tun_ofport = constants.OFPORT_INVALID
if self.enable_tunneling:
# The patch_int_ofport and patch_tun_ofport are updated
# here inside the call to setup_tunnel_br()
self.setup_tunnel_br(ovs_conf.tunnel_bridge)
self.setup_tunnel_br_flows()
self.dvr_agent = ovs_dvr_neutron_agent.OVSDVRNeutronAgent(
self.context,
self.dvr_plugin_rpc,
self.int_br,
self.tun_br,
self.bridge_mappings,
self.phys_brs,
self.int_ofports,
self.phys_ofports,
self.patch_int_ofport,
self.patch_tun_ofport,
host,
self.enable_tunneling,
self.enable_distributed_routing)
if self.enable_distributed_routing:
self.dvr_agent.setup_dvr_flows()
# Collect additional bridges to monitor
self.ancillary_brs = self.setup_ancillary_bridges(
ovs_conf.integration_bridge, ovs_conf.tunnel_bridge)
agent_api = ovs_ext_api.OVSAgentExtensionAPI(self.int_br,
self.tun_br,
self.phys_brs)
self.ext_manager.initialize(
self.connection, constants.EXTENSION_DRIVER_TYPE, agent_api)
# In order to keep existed device's local vlan unchanged,
# restore local vlan mapping at start
self._restore_local_vlan_map()
# Security group agent support
self.sg_agent = agent_sg_rpc.SecurityGroupAgentRpc(
self.context, self.sg_plugin_rpc, defer_refresh_firewall=True,
integration_bridge=self.int_br)
self.sg_plugin_rpc.register_legacy_sg_notification_callbacks(
self.sg_agent)
# we default to False to provide backward compat with out of tree
# firewall drivers that expect the logic that existed on the Neutron
# server which only enabled hybrid plugging based on the use of the
# hybrid driver.
hybrid_plug = getattr(self.sg_agent.firewall,
'OVS_HYBRID_PLUG_REQUIRED', False)
self.prevent_arp_spoofing = (
not self.sg_agent.firewall.provides_arp_spoofing_protection)
self.failed_report_state = False
# TODO(mangelajo): optimize resource_versions to only report
# versions about resources which are common,
# or which are used by specific extensions.
self.agent_state = {
'binary': 'neutron-openvswitch-agent',
'host': host,
'topic': n_const.L2_AGENT_TOPIC,
'configurations': {'bridge_mappings': self.bridge_mappings,
c_const.RP_BANDWIDTHS: self.rp_bandwidths,
c_const.RP_INVENTORY_DEFAULTS:
self.rp_inventory_defaults,
'integration_bridge':
ovs_conf.integration_bridge,
'tunnel_types': self.tunnel_types,
'tunneling_ip': self.local_ip,
'l2_population': self.l2_pop,
'arp_responder_enabled':
self.arp_responder_enabled,
'enable_distributed_routing':
self.enable_distributed_routing,
'log_agent_heartbeats':
agent_conf.log_agent_heartbeats,
'extensions': self.ext_manager.names(),
'datapath_type': ovs_conf.datapath_type,
'ovs_capabilities': self.ovs.capabilities,
'vhostuser_socket_dir':
ovs_conf.vhostuser_socket_dir,
portbindings.OVS_HYBRID_PLUG: hybrid_plug},
'resource_versions': resources.LOCAL_RESOURCE_VERSIONS,
'agent_type': agent_conf.agent_type,
'start_flag': True}
report_interval = agent_conf.report_interval
if report_interval:
heartbeat = loopingcall.FixedIntervalLoopingCall(
self._report_state)
heartbeat.start(interval=report_interval)
# Initialize iteration counter
self.iter_num = 0
self.run_daemon_loop = True
self.catch_sigterm = False
self.catch_sighup = False
# The initialization is complete; we can start receiving messages
self.connection.consume_in_threads()
self.quitting_rpc_timeout = agent_conf.quitting_rpc_timeout
def _parse_bridge_mappings(self, bridge_mappings):
try:
return helpers.parse_mappings(bridge_mappings)
except ValueError as e:
raise ValueError(_("Parsing bridge_mappings failed: %s.") % e)
def _report_state(self):
# How many devices are likely used by a VM
self.agent_state.get('configurations')['devices'] = (
self.int_br_device_count)
self.agent_state.get('configurations')['in_distributed_mode'] = (
self.dvr_agent.in_distributed_mode())
try:
agent_status = self.state_rpc.report_state(self.context,
self.agent_state,
True)
if agent_status == agent_consts.AGENT_REVIVED:
LOG.info('Agent has just been revived. '
'Doing a full sync.')
self.fullsync = True
# we only want to update resource versions on startup
self.agent_state.pop('resource_versions', None)
if self.agent_state.pop('start_flag', None) and self.iter_num == 0:
# On initial start, we notify systemd after initialization
# is complete.
systemd.notify_once()
except Exception:
self.failed_report_state = True
LOG.exception("Failed reporting state!")
return
if self.failed_report_state:
self.failed_report_state = False
LOG.info("Successfully reported state after a previous failure.")
def _restore_local_vlan_map(self):
self._local_vlan_hints = {}
# skip INVALID and UNASSIGNED to match scan_ports behavior
ofport_filter = (ovs_lib.INVALID_OFPORT, ovs_lib.UNASSIGNED_OFPORT)
cur_ports = self.int_br.get_vif_ports(ofport_filter)
port_names = [p.port_name for p in cur_ports]
port_info = self.int_br.get_ports_attributes(
"Port", columns=["name", "other_config", "tag"], ports=port_names)
by_name = {x['name']: x for x in port_info}
for port in cur_ports:
# if a port was deleted between get_vif_ports and
# get_ports_attributes, we
# will get a KeyError
try:
local_vlan_map = by_name[port.port_name]['other_config']
local_vlan = by_name[port.port_name]['tag']
except KeyError:
continue
if not local_vlan:
continue
net_uuid = local_vlan_map.get('net_uuid')
if (net_uuid and net_uuid not in self._local_vlan_hints and
local_vlan != constants.DEAD_VLAN_TAG):
self.available_local_vlans.remove(local_vlan)
self._local_vlan_hints[local_vlan_map['net_uuid']] = \
local_vlan
def _dispose_local_vlan_hints(self):
self.available_local_vlans.update(self._local_vlan_hints.values())
self._local_vlan_hints = {}
def _reset_tunnel_ofports(self):
self.tun_br_ofports = {n_const.TYPE_GENEVE: {},
n_const.TYPE_GRE: {},
n_const.TYPE_VXLAN: {}}
def setup_rpc(self):
self.plugin_rpc = OVSPluginApi(topics.PLUGIN)
# allow us to receive port_update/delete callbacks from the cache
self.plugin_rpc.register_legacy_notification_callbacks(self)
self.sg_plugin_rpc = sg_rpc.SecurityGroupServerAPIShim(
self.plugin_rpc.remote_resource_cache)
self.dvr_plugin_rpc = dvr_rpc.DVRServerRpcApi(topics.PLUGIN)
self.state_rpc = agent_rpc.PluginReportStateAPI(topics.REPORTS)
# RPC network init
self.context = context.get_admin_context_without_session()
# Made a simple RPC call to Neutron Server.
while True:
try:
self.state_rpc.has_alive_neutron_server(self.context)
except oslo_messaging.MessagingTimeout as e:
LOG.warning('l2-agent cannot contact neutron server. '
'Check connectivity to neutron server. '
'Retrying... '
'Detailed message: %(msg)s.', {'msg': e})
continue
break
# Define the listening consumers for the agent
consumers = [[constants.TUNNEL, topics.UPDATE],
[constants.TUNNEL, topics.DELETE],
[topics.DVR, topics.UPDATE]]
if self.l2_pop:
consumers.append([topics.L2POPULATION, topics.UPDATE])
self.connection = agent_rpc.create_consumers([self],
topics.AGENT,
consumers,
start_listening=False)
def port_update(self, context, **kwargs):
port = kwargs.get('port')
# Put the port identifier in the updated_ports set.
# Even if full port details might be provided to this call,
# they are not used since there is no guarantee the notifications
# are processed in the same order as the relevant API requests
self.updated_ports.add(port['id'])
def port_delete(self, context, **kwargs):
port_id = kwargs.get('port_id')
self.deleted_ports.add(port_id)
self.updated_ports.discard(port_id)
def network_update(self, context, **kwargs):
network_id = kwargs['network']['id']
for port_id in self.network_ports[network_id]:
# notifications could arrive out of order, if the port is deleted
# we don't want to update it anymore
if port_id not in self.deleted_ports:
self.updated_ports.add(port_id)
LOG.debug("network_update message processed for network "
"%(network_id)s, with ports: %(ports)s",
{'network_id': network_id,
'ports': self.network_ports[network_id]})
def binding_deactivate(self, context, **kwargs):
if kwargs.get('host') != self.conf.host:
return
port_id = kwargs.get('port_id')
self.deactivated_bindings.add(port_id)
def binding_activate(self, context, **kwargs):
if kwargs.get('host') != self.conf.host:
return
port_id = kwargs.get('port_id')
self.activated_bindings.add(port_id)
def _clean_network_ports(self, port_id):
for port_set in self.network_ports.values():
if port_id in port_set:
port_set.remove(port_id)
break
def process_deleted_ports(self, port_info):
# don't try to process removed ports as deleted ports since
# they are already gone
if 'removed' in port_info:
self.deleted_ports -= port_info['removed']
deleted_ports = list(self.deleted_ports)
while self.deleted_ports:
port_id = self.deleted_ports.pop()
port = self.int_br.get_vif_port_by_id(port_id)
self._clean_network_ports(port_id)
self.ext_manager.delete_port(self.context,
{"vif_port": port,
"port_id": port_id})
# move to dead VLAN so deleted ports no
# longer have access to the network
if port:
# don't log errors since there is a chance someone will be
# removing the port from the bridge at the same time
self.port_dead(port, log_errors=False)
self.port_unbound(port_id)
# Flush firewall rules after ports are put on dead VLAN to be
# more secure
self.sg_agent.remove_devices_filter(deleted_ports)
def process_deactivated_bindings(self, port_info):
# don't try to deactivate bindings for removed ports since they are
# already gone
if 'removed' in port_info:
self.deactivated_bindings -= port_info['removed']
while self.deactivated_bindings:
port_id = self.deactivated_bindings.pop()
port = self.int_br.get_vif_port_by_id(port_id)
if not port:
continue
self.int_br.delete_port(port.port_name)
LOG.debug(("Port id %s unplugged from integration bridge because "
"its binding was de-activated"), port_id)
def process_activated_bindings(self, port_info, activated_bindings_copy):
# Compute which ports for activated bindings are still present...
activated_bindings_copy &= port_info['current']
# ...and treat them as just added
port_info['added'] |= activated_bindings_copy
def tunnel_update(self, context, **kwargs):
LOG.debug("tunnel_update received")
if not self.enable_tunneling:
return
tunnel_ip = kwargs.get('tunnel_ip')
tunnel_type = kwargs.get('tunnel_type')
if not tunnel_type:
LOG.error("No tunnel_type specified, cannot create tunnels")
return
if tunnel_type not in self.tunnel_types:
LOG.error("tunnel_type %s not supported by agent",
tunnel_type)
return
if tunnel_ip == self.local_ip:
return
tun_name = self.get_tunnel_name(tunnel_type, self.local_ip, tunnel_ip)
if tun_name is None:
return
if not self.l2_pop:
self._setup_tunnel_port(self.tun_br, tun_name, tunnel_ip,
tunnel_type)
self._setup_tunnel_flood_flow(self.tun_br, tunnel_type)
def tunnel_delete(self, context, **kwargs):
LOG.debug("tunnel_delete received")
if not self.enable_tunneling:
return
tunnel_ip = kwargs.get('tunnel_ip')
if not tunnel_ip:
LOG.error("No tunnel_ip specified, cannot delete tunnels")
return
tunnel_type = kwargs.get('tunnel_type')
if not tunnel_type:
LOG.error("No tunnel_type specified, cannot delete tunnels")
return
if tunnel_type not in self.tunnel_types:
LOG.error("tunnel_type %s not supported by agent",
tunnel_type)
return
ofport = self.tun_br_ofports[tunnel_type].get(tunnel_ip)
self.cleanup_tunnel_port(self.tun_br, ofport, tunnel_type)
def _tunnel_port_lookup(self, network_type, remote_ip):
return self.tun_br_ofports[network_type].get(remote_ip)
def fdb_add(self, context, fdb_entries):
LOG.debug("fdb_add received")
for lvm, agent_ports in self.get_agent_ports(fdb_entries):
agent_ports.pop(self.local_ip, None)
if len(agent_ports):
if not self.enable_distributed_routing:
with self.tun_br.deferred() as deferred_br:
self.fdb_add_tun(context, deferred_br, lvm,
agent_ports, self._tunnel_port_lookup)
else:
self.fdb_add_tun(context, self.tun_br, lvm,
agent_ports, self._tunnel_port_lookup)
def fdb_remove(self, context, fdb_entries):
LOG.debug("fdb_remove received")
for lvm, agent_ports in self.get_agent_ports(fdb_entries):
agent_ports.pop(self.local_ip, None)
if len(agent_ports):
if not self.enable_distributed_routing:
with self.tun_br.deferred() as deferred_br:
self.fdb_remove_tun(context, deferred_br, lvm,
agent_ports,
self._tunnel_port_lookup)
else:
self.fdb_remove_tun(context, self.tun_br, lvm,
agent_ports, self._tunnel_port_lookup)
def add_fdb_flow(self, br, port_info, remote_ip, lvm, ofport):
if port_info == n_const.FLOODING_ENTRY:
lvm.tun_ofports.add(ofport)
br.install_flood_to_tun(lvm.vlan, lvm.segmentation_id,
lvm.tun_ofports)
else:
self.setup_entry_for_arp_reply(br, 'add', lvm.vlan,
port_info.mac_address,
port_info.ip_address)
br.install_unicast_to_tun(lvm.vlan,
lvm.segmentation_id,
ofport,
port_info.mac_address)
def del_fdb_flow(self, br, port_info, remote_ip, lvm, ofport):
if port_info == n_const.FLOODING_ENTRY:
if ofport not in lvm.tun_ofports:
LOG.debug("attempt to remove a non-existent port %s", ofport)
return
lvm.tun_ofports.remove(ofport)
if len(lvm.tun_ofports) > 0:
br.install_flood_to_tun(lvm.vlan, lvm.segmentation_id,
lvm.tun_ofports)
else:
# This local vlan doesn't require any more tunneling
br.delete_flood_to_tun(lvm.vlan)
else:
self.setup_entry_for_arp_reply(br, 'remove', lvm.vlan,
port_info.mac_address,
port_info.ip_address)
br.delete_unicast_to_tun(lvm.vlan, port_info.mac_address)
def _fdb_chg_ip(self, context, fdb_entries):
LOG.debug("update chg_ip received")
with self.tun_br.deferred() as deferred_br:
self.fdb_chg_ip_tun(context, deferred_br, fdb_entries,
self.local_ip)
def setup_entry_for_arp_reply(self, br, action, local_vid, mac_address,
ip_address):
'''Set the ARP respond entry.
When the l2 population mechanism driver and OVS supports to edit ARP
fields, a table (ARP_RESPONDER) to resolve ARP locally is added to the
tunnel bridge.
'''
if not self.arp_responder_enabled:
return
ip = netaddr.IPAddress(ip_address)
if ip.version == 6:
return
ip = str(ip)
mac = str(netaddr.EUI(mac_address, dialect=_mac_mydialect))
if action == 'add':
br.install_arp_responder(local_vid, ip, mac)
elif action == 'remove':
br.delete_arp_responder(local_vid, ip)
else:
LOG.warning('Action %s not supported', action)
def _local_vlan_for_flat(self, lvid, physical_network):
phys_br = self.phys_brs[physical_network]
phys_port = self.phys_ofports[physical_network]
int_br = self.int_br
int_port = self.int_ofports[physical_network]
phys_br.provision_local_vlan(port=phys_port, lvid=lvid,
segmentation_id=None,
distributed=False)
int_br.provision_local_vlan(port=int_port, lvid=lvid,
segmentation_id=None)
def _local_vlan_for_vlan(self, lvid, physical_network, segmentation_id):
distributed = self.enable_distributed_routing
phys_br = self.phys_brs[physical_network]
phys_port = self.phys_ofports[physical_network]
int_br = self.int_br
int_port = self.int_ofports[physical_network]
phys_br.provision_local_vlan(port=phys_port, lvid=lvid,
segmentation_id=segmentation_id,
distributed=distributed)
int_br.provision_local_vlan(port=int_port, lvid=lvid,
segmentation_id=segmentation_id)
def provision_local_vlan(self, net_uuid, network_type, physical_network,
segmentation_id):
'''Provisions a local VLAN.
:param net_uuid: the uuid of the network associated with this vlan.
:param network_type: the network type ('gre', 'vxlan', 'vlan', 'flat',
'local', 'geneve')
:param physical_network: the physical network for 'vlan' or 'flat'
:param segmentation_id: the VID for 'vlan' or tunnel ID for 'tunnel'
'''
# On a restart or crash of OVS, the network associated with this VLAN
# will already be assigned, so check for that here before assigning a
# new one.
try:
lvm = self.vlan_manager.get(net_uuid)
lvid = lvm.vlan
except vlanmanager.MappingNotFound:
lvid = self._local_vlan_hints.pop(net_uuid, None)
if lvid is None:
if not self.available_local_vlans:
LOG.error("No local VLAN available for net-id=%s",
net_uuid)
return
lvid = self.available_local_vlans.pop()
self.vlan_manager.add(
net_uuid, lvid, network_type, physical_network,
segmentation_id)
LOG.info("Assigning %(vlan_id)s as local vlan for "
"net-id=%(net_uuid)s",
{'vlan_id': lvid, 'net_uuid': net_uuid})
if network_type in constants.TUNNEL_NETWORK_TYPES:
if self.enable_tunneling:
# outbound broadcast/multicast
ofports = list(self.tun_br_ofports[network_type].values())
if ofports:
self.tun_br.install_flood_to_tun(lvid,
segmentation_id,
ofports)
# inbound from tunnels: set lvid in the right table
# and resubmit to Table LEARN_FROM_TUN for mac learning
if self.enable_distributed_routing:
self.dvr_agent.process_tunneled_network(
network_type, lvid, segmentation_id)
else:
self.tun_br.provision_local_vlan(
network_type=network_type, lvid=lvid,
segmentation_id=segmentation_id)
else:
LOG.error("Cannot provision %(network_type)s network for "
"net-id=%(net_uuid)s - tunneling disabled",
{'network_type': network_type,
'net_uuid': net_uuid})
elif network_type == n_const.TYPE_FLAT:
if physical_network in self.phys_brs:
self._local_vlan_for_flat(lvid, physical_network)
else:
LOG.error("Cannot provision flat network for "
"net-id=%(net_uuid)s - no bridge for "
"physical_network %(physical_network)s",
{'net_uuid': net_uuid,
'physical_network': physical_network})
elif network_type == n_const.TYPE_VLAN:
if physical_network in self.phys_brs:
self._local_vlan_for_vlan(lvid, physical_network,
segmentation_id)
else:
LOG.error("Cannot provision VLAN network for "
"net-id=%(net_uuid)s - no bridge for "
"physical_network %(physical_network)s",
{'net_uuid': net_uuid,
'physical_network': physical_network})
elif network_type == n_const.TYPE_LOCAL:
# no flows needed for local networks
pass
else:
LOG.error("Cannot provision unknown network type "
"%(network_type)s for net-id=%(net_uuid)s",
{'network_type': network_type,
'net_uuid': net_uuid})
def reclaim_local_vlan(self, net_uuid):
'''Reclaim a local VLAN.
:param net_uuid: the network uuid associated with this vlan.
'''
try:
lvm = vlanmanager.LocalVlanManager().pop(net_uuid)
except KeyError:
LOG.debug("Network %s not used on agent.", net_uuid)
return
LOG.info("Reclaiming vlan = %(vlan_id)s from "
"net-id = %(net_uuid)s",
{'vlan_id': lvm.vlan, 'net_uuid': net_uuid})
if lvm.network_type in constants.TUNNEL_NETWORK_TYPES:
if self.enable_tunneling:
self.tun_br.reclaim_local_vlan(
network_type=lvm.network_type,
segmentation_id=lvm.segmentation_id)
self.tun_br.delete_flood_to_tun(lvm.vlan)
self.tun_br.delete_unicast_to_tun(lvm.vlan, None)
self.tun_br.delete_arp_responder(lvm.vlan, None)
if self.l2_pop:
# Try to remove tunnel ports if not used by other networks
for ofport in lvm.tun_ofports:
self.cleanup_tunnel_port(self.tun_br, ofport,
lvm.network_type)
elif lvm.network_type == n_const.TYPE_FLAT:
if lvm.physical_network in self.phys_brs:
# outbound
br = self.phys_brs[lvm.physical_network]
br.reclaim_local_vlan(
port=self.phys_ofports[lvm.physical_network],
lvid=lvm.vlan)
# inbound
br = self.int_br
br.reclaim_local_vlan(
port=self.int_ofports[lvm.physical_network],
segmentation_id=None)
elif lvm.network_type == n_const.TYPE_VLAN:
if lvm.physical_network in self.phys_brs:
# outbound
br = self.phys_brs[lvm.physical_network]
br.reclaim_local_vlan(
port=self.phys_ofports[lvm.physical_network],
lvid=lvm.vlan)
# inbound
br = self.int_br
br.reclaim_local_vlan(
port=self.int_ofports[lvm.physical_network],
segmentation_id=lvm.segmentation_id)
elif lvm.network_type == n_const.TYPE_LOCAL:
# no flows needed for local networks
pass
else:
LOG.error("Cannot reclaim unknown network type "
"%(network_type)s for net-id=%(net_uuid)s",
{'network_type': lvm.network_type,
'net_uuid': net_uuid})
self.available_local_vlans.add(lvm.vlan)
def port_bound(self, port, net_uuid,
network_type, physical_network,
segmentation_id, fixed_ips, device_owner,
provisioning_needed):
'''Bind port to net_uuid/lsw_id and install flow for inbound traffic
to vm.
:param port: an ovs_lib.VifPort object.
:param net_uuid: the net_uuid this port is to be associated with.
:param network_type: the network type ('gre', 'vlan', 'flat', 'local')
:param physical_network: the physical network for 'vlan' or 'flat'
:param segmentation_id: the VID for 'vlan' or tunnel ID for 'tunnel'
:param fixed_ips: the ip addresses assigned to this port
:param device_owner: the string indicative of owner of this port
:param provisioning_needed: indicates if this is called for an OVS
restart or recreated physical bridges
and requires to do local vlan provisioning
'''
if net_uuid not in self.vlan_manager or provisioning_needed:
self.provision_local_vlan(net_uuid, network_type,
physical_network, segmentation_id)
lvm = self.vlan_manager.get(net_uuid)
lvm.vif_ports[port.vif_id] = port
self.dvr_agent.bind_port_to_dvr(port, lvm,
fixed_ips,
device_owner)
port_other_config = self.int_br.db_get_val("Port", port.port_name,
"other_config")
if port_other_config is None:
if port.vif_id in self.deleted_ports:
LOG.debug("Port %s deleted concurrently", port.vif_id)
elif port.vif_id in self.updated_ports:
LOG.error("Expected port %s not found", port.vif_id)
else:
LOG.debug("Unable to get config for port %s", port.vif_id)
return False
vlan_mapping = {'net_uuid': net_uuid,
'network_type': network_type,
'physical_network': str(physical_network)}
if segmentation_id is not None:
vlan_mapping['segmentation_id'] = str(segmentation_id)
port_other_config.update(vlan_mapping)
self.int_br.set_db_attribute("Port", port.port_name, "other_config",
port_other_config)
return True
def _add_port_tag_info(self, need_binding_ports):
port_names = [p['vif_port'].port_name for p in need_binding_ports]
port_info = self.int_br.get_ports_attributes(
"Port", columns=["name", "tag", "other_config"],
ports=port_names, if_exists=True)
info_by_port = {
x['name']: {
'tag': x['tag'],
'other_config': x['other_config'] or {}
}
for x in port_info
}
for port_detail in need_binding_ports:
try:
lvm = self.vlan_manager.get(port_detail['network_id'])
except vlanmanager.MappingNotFound:
continue
port = port_detail['vif_port']
try:
cur_info = info_by_port[port.port_name]
except KeyError:
continue
other_config = cur_info['other_config']
if (cur_info['tag'] != lvm.vlan or
other_config.get('tag') != lvm.vlan):
other_config['tag'] = str(lvm.vlan)
self.int_br.set_db_attribute(
"Port", port.port_name, "other_config", other_config)
# Uninitialized port has tag set to []
if cur_info['tag']:
self.int_br.uninstall_flows(in_port=port.ofport)
def _bind_devices(self, need_binding_ports):
devices_up = []
devices_down = []
failed_devices = []
port_names = [p['vif_port'].port_name for p in need_binding_ports]
port_info = self.int_br.get_ports_attributes(
"Port", columns=["name", "tag"], ports=port_names, if_exists=True)
tags_by_name = {x['name']: x['tag'] for x in port_info}
for port_detail in need_binding_ports:
try:
lvm = self.vlan_manager.get(port_detail['network_id'])
except vlanmanager.MappingNotFound:
# network for port was deleted. skip this port since it
# will need to be handled as a DEAD port in the next scan
continue
port = port_detail['vif_port']
device = port_detail['device']
# Do not bind a port if it's already bound
cur_tag = tags_by_name.get(port.port_name)
if cur_tag is None:
LOG.debug("Port %s was deleted concurrently, skipping it",
port.port_name)
continue
if self.prevent_arp_spoofing:
self.setup_arp_spoofing_protection(self.int_br,
port, port_detail)
if cur_tag != lvm.vlan:
self.int_br.set_db_attribute(
"Port", port.port_name, "tag", lvm.vlan)
# update plugin about port status
# FIXME(salv-orlando): Failures while updating device status
# must be handled appropriately. Otherwise this might prevent
# neutron server from sending network-vif-* events to the nova
# API server, thus possibly preventing instance spawn.
if port_detail.get('admin_state_up'):
LOG.debug("Setting status for %s to UP", device)
devices_up.append(device)
else:
LOG.debug("Setting status for %s to DOWN", device)
devices_down.append(device)
if devices_up or devices_down:
# When the iter_num == 0, that indicate the ovs-agent is doing
# the initialization work. L2 pop needs this precise knowledge
# to notify the agent to refresh the tunnel related flows.
# Otherwise, these flows will be cleaned as stale due to the
# different cookie id.
agent_restarted = self.iter_num == 0
devices_set = self.plugin_rpc.update_device_list(
self.context, devices_up, devices_down, self.agent_id,
self.conf.host, agent_restarted=agent_restarted)
failed_devices = (devices_set.get('failed_devices_up') +
devices_set.get('failed_devices_down'))
if failed_devices:
LOG.error("Configuration for devices %s failed!",
failed_devices)
LOG.info("Configuration for devices up %(up)s and devices "
"down %(down)s completed.",
{'up': devices_up, 'down': devices_down})
return set(failed_devices)
@staticmethod
def setup_arp_spoofing_protection(bridge, vif, port_details):
if not port_details.get('port_security_enabled', True):
LOG.info("Skipping ARP spoofing rules for port '%s' because "
"it has port security disabled", vif.port_name)
bridge.delete_arp_spoofing_protection(port=vif.ofport)
bridge.set_allowed_macs_for_port(port=vif.ofport, allow_all=True)
return
if port_details['device_owner'].startswith(
n_const.DEVICE_OWNER_NETWORK_PREFIX):
LOG.debug("Skipping ARP spoofing rules for network owned port "
"'%s'.", vif.port_name)
bridge.delete_arp_spoofing_protection(port=vif.ofport)
bridge.set_allowed_macs_for_port(port=vif.ofport, allow_all=True)
return
# clear any previous flows related to this port in our ARP table
bridge.delete_arp_spoofing_allow_rules(port=vif.ofport)
# collect all of the addresses and cidrs that belong to the port
addresses = {f['ip_address'] for f in port_details['fixed_ips']}
mac_addresses = {vif.vif_mac}
if port_details.get('allowed_address_pairs'):
addresses |= {p['ip_address']
for p in port_details['allowed_address_pairs']}
mac_addresses |= {p['mac_address']
for p in port_details['allowed_address_pairs']
if p.get('mac_address')}
bridge.set_allowed_macs_for_port(vif.ofport, mac_addresses)
ipv6_addresses = {ip for ip in addresses
if netaddr.IPNetwork(ip).version == 6}
# Allow neighbor advertisements for LLA address.
ipv6_addresses |= {str(netutils.get_ipv6_addr_by_EUI64(
n_const.IPv6_LLA_PREFIX, mac))
for mac in mac_addresses}
if not has_zero_prefixlen_address(ipv6_addresses):
# Install protection only when prefix is not zero because a /0
# prefix allows any address anyway and the nd_target can only
# match on /1 or more.
bridge.install_icmpv6_na_spoofing_protection(
port=vif.ofport, ip_addresses=ipv6_addresses)
ipv4_addresses = {ip for ip in addresses
if netaddr.IPNetwork(ip).version == 4}
if not has_zero_prefixlen_address(ipv4_addresses):
# Install protection only when prefix is not zero because a /0
# prefix allows any address anyway and the ARP_SPA can only
# match on /1 or more.
bridge.install_arp_spoofing_protection(port=vif.ofport,
ip_addresses=ipv4_addresses)
else:
bridge.delete_arp_spoofing_protection(port=vif.ofport)
def port_unbound(self, vif_id, net_uuid=None):
'''Unbind port.
Removes corresponding local vlan mapping object if this is its last
VIF.
:param vif_id: the id of the vif
:param net_uuid: the net_uuid this port is associated with.
'''
try:
net_uuid = net_uuid or self.vlan_manager.get_net_uuid(vif_id)
except vlanmanager.VifIdNotFound:
LOG.info(
'port_unbound(): net_uuid %s not managed by VLAN manager',
net_uuid)
return
lvm = self.vlan_manager.get(net_uuid)
if vif_id in lvm.vif_ports:
vif_port = lvm.vif_ports[vif_id]
self.dvr_agent.unbind_port_from_dvr(vif_port, lvm)
lvm.vif_ports.pop(vif_id, None)
if not lvm.vif_ports:
self.reclaim_local_vlan(net_uuid)
def port_dead(self, port, log_errors=True):
'''Once a port has no binding, put it on the "dead vlan".
:param port: an ovs_lib.VifPort object.
'''
# Don't kill a port if it's already dead
cur_tag = self.int_br.db_get_val("Port", port.port_name, "tag",
log_errors=log_errors)
if cur_tag and cur_tag != constants.DEAD_VLAN_TAG:
self.int_br.set_db_attribute("Port", port.port_name, "tag",
constants.DEAD_VLAN_TAG,
log_errors=log_errors)
self.int_br.drop_port(in_port=port.ofport)
def setup_integration_br(self):
'''Setup the integration bridge.
'''
# Ensure the integration bridge is created.
# ovs_lib.OVSBridge.create() will run the equivalent of
# ovs-vsctl -- --may-exist add-br BRIDGE_NAME
# which does nothing if bridge already exists.
self.int_br.create()
self.int_br.set_secure_mode()
self.int_br.setup_controllers(self.conf)
if self.conf.AGENT.drop_flows_on_start:
# Delete the patch port between br-int and br-tun if we're deleting
# the flows on br-int, so that traffic doesn't get flooded over
# while flows are missing.
self.int_br.delete_port(self.conf.OVS.int_peer_patch_port)
self.int_br.uninstall_flows(cookie=ovs_lib.COOKIE_ANY)
self.int_br.setup_default_table()
def setup_ancillary_bridges(self, integ_br, tun_br):
'''Setup ancillary bridges - for example br-ex.'''
ovs = ovs_lib.BaseOVS()
ovs_bridges = set(ovs.get_bridges())
# Remove all known bridges
ovs_bridges.remove(integ_br)
if self.enable_tunneling:
ovs_bridges.remove(tun_br)
br_names = [self.phys_brs[physical_network].br_name for
physical_network in self.phys_brs]
ovs_bridges.difference_update(br_names)
# Filter list of bridges to those that have external
# bridge-id's configured
br_names = []
for bridge in ovs_bridges:
bridge_id = ovs.get_bridge_external_bridge_id(bridge,
log_errors=False)
if bridge_id != bridge:
br_names.append(bridge)
ovs_bridges.difference_update(br_names)
ancillary_bridges = []
for bridge in ovs_bridges:
br = ovs_lib.OVSBridge(bridge)
LOG.info('Adding %s to list of bridges.', bridge)
ancillary_bridges.append(br)
return ancillary_bridges
def setup_tunnel_br(self, tun_br_name=None):
'''(re)initialize the tunnel bridge.
Creates tunnel bridge, and links it to the integration bridge
using a patch port.
:param tun_br_name: the name of the tunnel bridge.
'''
if not self.tun_br:
self.tun_br = self.br_tun_cls(tun_br_name)
# tun_br.create() won't recreate bridge if it exists, but will handle
# cases where something like datapath_type has changed
self.tun_br.create(secure_mode=True)
self.tun_br.setup_controllers(self.conf)
if (not self.int_br.port_exists(self.conf.OVS.int_peer_patch_port) or
self.patch_tun_ofport == ovs_lib.INVALID_OFPORT):
self.patch_tun_ofport = self.int_br.add_patch_port(
self.conf.OVS.int_peer_patch_port,
self.conf.OVS.tun_peer_patch_port)
if (not self.tun_br.port_exists(self.conf.OVS.tun_peer_patch_port) or
self.patch_int_ofport == ovs_lib.INVALID_OFPORT):
self.patch_int_ofport = self.tun_br.add_patch_port(
self.conf.OVS.tun_peer_patch_port,
self.conf.OVS.int_peer_patch_port)
if ovs_lib.INVALID_OFPORT in (self.patch_tun_ofport,
self.patch_int_ofport):
LOG.error("Failed to create OVS patch port. Cannot have "
"tunneling enabled on this agent, since this "
"version of OVS does not support tunnels or patch "
"ports. Agent terminated!")
sys.exit(1)
if self.conf.AGENT.drop_flows_on_start:
self.tun_br.uninstall_flows(cookie=ovs_lib.COOKIE_ANY)
def setup_tunnel_br_flows(self):
'''Setup the tunnel bridge.
Add all flows to the tunnel bridge.
'''
self.tun_br.setup_default_table(self.patch_int_ofport,
self.arp_responder_enabled)
def _reconfigure_physical_bridges(self, bridges):
sync = False
bridge_mappings = {}
for bridge in bridges:
LOG.info("Physical bridge %s was just re-created.", bridge)
for phys_net, phys_br in self.bridge_mappings.items():
if bridge == phys_br:
bridge_mappings[phys_net] = bridge
if bridge_mappings:
sync = True
self.setup_physical_bridges(bridge_mappings)
return sync
def _check_bridge_datapath_id(self, bridge, datapath_ids_set):
"""Check for bridges with duplicate datapath-id
Bottom 48 bits auto-derived from MAC of NIC. Upper 12 bits free,
so we OR it with (bridge # << 48) to create a unique ID
It must be exactly 64 bits, else OVS will reject it - zfill
:param bridge: (OVSPhysicalBridge) bridge
:param datapath_ids_set: (set) used datapath ids in OVS
"""
dpid = int(bridge.get_datapath_id(), 16)
dpid_hex = format(dpid, '0x').zfill(16)
if dpid_hex in datapath_ids_set:
dpid_hex = format(
dpid + (len(datapath_ids_set) << 48), '0x').zfill(16)
bridge.set_datapath_id(dpid_hex)
LOG.info('Bridge %s datapath-id = 0x%s', bridge.br_name, dpid_hex)
datapath_ids_set.add(dpid_hex)
def setup_physical_bridges(self, bridge_mappings):
'''Setup the physical network bridges.
Creates physical network bridges and links them to the
integration bridge using veths or patch ports.
:param bridge_mappings: map physical network names to bridge names.
'''
self.phys_brs = {}
self.int_ofports = {}
self.phys_ofports = {}
datapath_ids_set = set()
ip_wrapper = ip_lib.IPWrapper()
ovs = ovs_lib.BaseOVS()
ovs_bridges = ovs.get_bridges()
for physical_network, bridge in bridge_mappings.items():
LOG.info("Mapping physical network %(physical_network)s to "
"bridge %(bridge)s",
{'physical_network': physical_network,
'bridge': bridge})
# setup physical bridge
if bridge not in ovs_bridges:
LOG.error("Bridge %(bridge)s for physical network "
"%(physical_network)s does not exist. Agent "
"terminated!",
{'physical_network': physical_network,
'bridge': bridge})
sys.exit(1)
br = self.br_phys_cls(bridge)
self._check_bridge_datapath_id(br, datapath_ids_set)
# The bridge already exists, so create won't recreate it, but will
# handle things like changing the datapath_type
br.create()
br.set_secure_mode()
br.setup_controllers(self.conf)
if cfg.CONF.AGENT.drop_flows_on_start:
br.uninstall_flows(cookie=ovs_lib.COOKIE_ANY)
br.setup_default_table()
self.phys_brs[physical_network] = br
# interconnect physical and integration bridges using veth/patches
int_if_name = plugin_utils.get_interface_name(
bridge, prefix=constants.PEER_INTEGRATION_PREFIX)
phys_if_name = plugin_utils.get_interface_name(
bridge, prefix=constants.PEER_PHYSICAL_PREFIX)
# Interface type of port for physical and integration bridges must
# be same, so check only one of them.
# Not logging error here, as the interface may not exist yet.
# Type check is done to cleanup wrong interface if any.
int_type = self.int_br.db_get_val("Interface", int_if_name, "type",
log_errors=False)
if self.use_veth_interconnection:
# Drop ports if the interface types doesn't match the
# configuration value.
if int_type == 'patch':
self.int_br.delete_port(int_if_name)
br.delete_port(phys_if_name)
device = ip_lib.IPDevice(int_if_name)
if device.exists():
device.link.delete()
# Give udev a chance to process its rules here, to avoid
# race conditions between commands launched by udev rules
# and the subsequent call to ip_wrapper.add_veth
utils.execute(['udevadm', 'settle', '--timeout=10'])
int_veth, phys_veth = ip_wrapper.add_veth(int_if_name,
phys_if_name)
int_ofport = self.int_br.add_port(int_if_name)
phys_ofport = br.add_port(phys_if_name)
else:
# Drop ports if the interface type doesn't match the
# configuration value
if int_type == 'veth':
self.int_br.delete_port(int_if_name)
br.delete_port(phys_if_name)
# Setup int_br to physical bridge patches. If they already
# exist we leave them alone, otherwise we create them but don't
# connect them until after the drop rules are in place.
if self.int_br.port_exists(int_if_name):
int_ofport = self.int_br.get_port_ofport(int_if_name)
else:
int_ofport = self.int_br.add_patch_port(
int_if_name, constants.NONEXISTENT_PEER)
if br.port_exists(phys_if_name):
phys_ofport = br.get_port_ofport(phys_if_name)
else:
phys_ofport = br.add_patch_port(
phys_if_name, constants.NONEXISTENT_PEER)
self.int_ofports[physical_network] = int_ofport
self.phys_ofports[physical_network] = phys_ofport
# These two drop flows are the root cause for the bug #1803919.
# And now we add a rpc check during agent start procedure. If
# ovs agent can not reach any neutron server, or all neutron
# servers are down, these flows will not be installed anymore.
# Bug #1803919 was fixed in that way.
# And as a reminder, we can not do much work on this. Because
# the bridge mappings can be varied. Provider (external) network
# can be implicitly set on any physical bridge due to the basic
# NORMAL flow. Different vlan range networks can also have many
# bridge map settings, these tenant network traffic can also be
# blocked by the following drop flows.
# block all untranslated traffic between bridges
self.int_br.drop_port(in_port=int_ofport)
br.drop_port(in_port=phys_ofport)
if self.use_veth_interconnection:
# enable veth to pass traffic
int_veth.link.set_up()
phys_veth.link.set_up()
if self.veth_mtu:
# set up mtu size for veth interfaces
int_veth.link.set_mtu(self.veth_mtu)
phys_veth.link.set_mtu(self.veth_mtu)
else:
# associate patch ports to pass traffic
self.int_br.set_db_attribute('Interface', int_if_name,
'options', {'peer': phys_if_name})
br.set_db_attribute('Interface', phys_if_name,
'options', {'peer': int_if_name})
def update_stale_ofport_rules(self):
# ARP spoofing rules and drop-flow upon port-delete
# use ofport-based rules
previous = self.vifname_to_ofport_map
current = self.int_br.get_vif_port_to_ofport_map()
# if any ofport numbers have changed, re-process the devices as
# added ports so any rules based on ofport numbers are updated.
moved_ports = self._get_ofport_moves(current, previous)
# delete any stale rules based on removed ofports
ofports_deleted = set(previous.values()) - set(current.values())
for ofport in ofports_deleted:
if self.prevent_arp_spoofing:
self.int_br.delete_arp_spoofing_protection(port=ofport)
self.int_br.uninstall_flows(in_port=ofport)
# store map for next iteration
self.vifname_to_ofport_map = current
return moved_ports
@staticmethod
def _get_ofport_moves(current, previous):
"""Returns a list of moved ports.
Takes two port->ofport maps and returns a list ports that moved to a
different ofport. Deleted ports are not included.
"""
port_moves = []
for name, ofport in previous.items():
if name not in current:
continue
current_ofport = current[name]
if ofport != current_ofport:
port_moves.append(name)
return port_moves
def _get_port_info(self, registered_ports, cur_ports,
readd_registered_ports):
port_info = {'current': cur_ports,
'added': set(),
'removed': set()}
# FIXME(salv-orlando): It's not really necessary to return early
# if nothing has changed.
if not readd_registered_ports and cur_ports == registered_ports:
return port_info
if readd_registered_ports:
port_info['added'] = cur_ports
else:
port_info['added'] = cur_ports - registered_ports
# Update port_info with ports not found on the integration bridge
port_info['removed'] = registered_ports - cur_ports
return port_info
def _update_port_info_failed_devices_stats(self, port_info,
failed_devices):
# remove failed devices that don't need to be retried
failed_devices['added'] -= port_info['removed']
failed_devices['removed'] -= port_info['added']
# Disregard devices that were never noticed by the agent
port_info['removed'] &= port_info['current']
# retry failed devices
port_info['added'] |= failed_devices['added']
if failed_devices['added']:
LOG.debug("retrying failed devices %s", failed_devices['added'])
port_info['removed'] |= failed_devices['removed']
# Update current ports
port_info['current'] |= port_info['added']
port_info['current'] -= port_info['removed']
def process_ports_events(self, events, registered_ports, ancillary_ports,
old_ports_not_ready, failed_devices,
failed_ancillary_devices, updated_ports=None):
port_info = {}
port_info['added'] = set()
port_info['removed'] = set()
port_info['current'] = registered_ports
ancillary_port_info = {}
ancillary_port_info['added'] = set()
ancillary_port_info['removed'] = set()
ancillary_port_info['current'] = ancillary_ports
ports_not_ready_yet = set()
# if a port was added and then removed or viceversa since the agent
# can't know the order of the operations, check the status of the port
# to determine if the port was added or deleted
added_ports = {p['name'] for p in events['added']}
removed_ports = {p['name'] for p in events['removed']}
ports_removed_and_added = added_ports & removed_ports
for p in ports_removed_and_added:
if ovs_lib.BaseOVS().port_exists(p):
events['removed'] = [e for e in events['removed']
if e['name'] != p]
else:
events['added'] = [e for e in events['added']
if e['name'] != p]
# TODO(rossella_s): scanning the ancillary bridge won't be needed
# anymore when https://review.openstack.org/#/c/203381 since the bridge
# id stored in external_ids will be used to identify the bridge the
# port belongs to
cur_ancillary_ports = set()
for bridge in self.ancillary_brs:
cur_ancillary_ports |= bridge.get_vif_port_set()
cur_ancillary_ports |= ancillary_port_info['current']
def _process_port(port, ports, ancillary_ports):
# check 'iface-id' is set otherwise is not a port
# the agent should care about
if 'attached-mac' in port.get('external_ids', []):
iface_id = self.int_br.portid_from_external_ids(
port['external_ids'])
if iface_id:
if port['ofport'] == ovs_lib.UNASSIGNED_OFPORT:
LOG.debug("Port %s not ready yet on the bridge",
iface_id)
ports_not_ready_yet.add(port['name'])
return
# check if port belongs to ancillary bridge
if iface_id in cur_ancillary_ports:
ancillary_ports.add(iface_id)
else:
ports.add(iface_id)
if old_ports_not_ready:
old_ports_not_ready_attrs = self.int_br.get_ports_attributes(
'Interface', columns=['name', 'external_ids', 'ofport'],
ports=old_ports_not_ready, if_exists=True)
now_ready_ports = set(
[p['name'] for p in old_ports_not_ready_attrs])
LOG.debug("Ports %s are now ready", now_ready_ports)
old_ports_not_ready_yet = old_ports_not_ready - now_ready_ports
removed_ports = set([p['name'] for p in events['removed']])
old_ports_not_ready_yet -= removed_ports
LOG.debug("Ports %s were not ready at last iteration and are not "
"ready yet", old_ports_not_ready_yet)
ports_not_ready_yet |= old_ports_not_ready_yet
events['added'].extend(old_ports_not_ready_attrs)
for port in events['added']:
_process_port(port, port_info['added'],
ancillary_port_info['added'])
for port in events['removed']:
_process_port(port, port_info['removed'],
ancillary_port_info['removed'])
self._update_port_info_failed_devices_stats(port_info, failed_devices)
self._update_port_info_failed_devices_stats(ancillary_port_info,
failed_ancillary_devices)
if updated_ports is None:
updated_ports = set()
updated_ports.update(self.check_changed_vlans())
if updated_ports:
# Some updated ports might have been removed in the
# meanwhile, and therefore should not be processed.
# In this case the updated port won't be found among
# current ports.
updated_ports &= port_info['current']
port_info['updated'] = updated_ports
return port_info, ancillary_port_info, ports_not_ready_yet
def scan_ports(self, registered_ports, sync, updated_ports=None):
cur_ports = self.int_br.get_vif_port_set()
self.int_br_device_count = len(cur_ports)
port_info = self._get_port_info(registered_ports, cur_ports, sync)
if updated_ports is None:
updated_ports = set()
updated_ports.update(self.check_changed_vlans())
if updated_ports:
# Some updated ports might have been removed in the
# meanwhile, and therefore should not be processed.
# In this case the updated port won't be found among
# current ports.
updated_ports &= cur_ports
if updated_ports:
port_info['updated'] = updated_ports
return port_info
def scan_ancillary_ports(self, registered_ports, sync):
cur_ports = set()
for bridge in self.ancillary_brs:
cur_ports |= bridge.get_vif_port_set()
return self._get_port_info(registered_ports, cur_ports, sync)
def check_changed_vlans(self):
"""Check for changed VLAN tags. If changes, notify server and return.
The returned value is a set of port ids of the ports concerned by a
vlan tag loss.
"""
port_tags = self.int_br.get_port_tag_dict()
changed_ports = set()
for lvm in self.vlan_manager:
for port in lvm.vif_ports.values():
if (
port.port_name in port_tags and
port_tags[port.port_name] != lvm.vlan
):
LOG.info(
"Port '%(port_name)s' has lost "
"its vlan tag '%(vlan_tag)d'!",
{'port_name': port.port_name,
'vlan_tag': lvm.vlan}
)
changed_ports.add(port.vif_id)
if changed_ports:
# explicitly mark these DOWN on the server since they have been
# manipulated (likely a nova unplug/replug) and need to be rewired
devices_down = self.plugin_rpc.update_device_list(self.context,
[],
changed_ports,
self.agent_id,
self.conf.host)
failed_devices = set(devices_down.get('failed_devices_down'))
if failed_devices:
LOG.debug("Status updated failed for %s", failed_devices)
return changed_ports
def treat_vif_port(self, vif_port, port_id, network_id, network_type,
physical_network, segmentation_id, admin_state_up,
fixed_ips, device_owner, provisioning_needed):
# When this function is called for a port, the port should have
# an OVS ofport configured, as only these ports were considered
# for being treated. If that does not happen, it is a potential
# error condition of which operators should be aware
port_needs_binding = True
if not vif_port.ofport:
LOG.warning("VIF port: %s has no ofport configured, "
"and might not be able to transmit",
vif_port.vif_id)
if vif_port:
if admin_state_up:
port_needs_binding = self.port_bound(
vif_port, network_id, network_type,
physical_network, segmentation_id,
fixed_ips, device_owner, provisioning_needed)
else:
LOG.info("VIF port: %s admin state up disabled, "
"putting on the dead VLAN", vif_port.vif_id)
self.port_dead(vif_port)
self.plugin_rpc.update_device_down(
self.context, port_id, self.agent_id,
self.conf.host)
port_needs_binding = False
else:
LOG.debug("No VIF port for port %s defined on agent.", port_id)
return port_needs_binding
def _setup_tunnel_port(self, br, port_name, remote_ip, tunnel_type):
try:
if (netaddr.IPAddress(self.local_ip).version !=
netaddr.IPAddress(remote_ip).version):
LOG.error("IP version mismatch, cannot create tunnel: "
"local_ip=%(lip)s remote_ip=%(rip)s",
{'lip': self.local_ip, 'rip': remote_ip})
return 0
except Exception:
LOG.error("Invalid local or remote IP, cannot create tunnel: "
"local_ip=%(lip)s remote_ip=%(rip)s",
{'lip': self.local_ip, 'rip': remote_ip})
return 0
ofport = br.add_tunnel_port(port_name,
remote_ip,
self.local_ip,
tunnel_type,
self.vxlan_udp_port,
self.dont_fragment,
self.tunnel_csum,
self.tos)
if ofport == ovs_lib.INVALID_OFPORT:
LOG.error("Failed to set-up %(type)s tunnel port to %(ip)s",
{'type': tunnel_type, 'ip': remote_ip})
return 0
self.tun_br_ofports[tunnel_type][remote_ip] = ofport
# Add flow in default table to resubmit to the right
# tunneling table (lvid will be set in the latter)
br.setup_tunnel_port(tunnel_type, ofport)
return ofport
def _setup_tunnel_flood_flow(self, br, tunnel_type):
ofports = self.tun_br_ofports[tunnel_type].values()
if ofports and not self.l2_pop:
# Update flooding flows to include the new tunnel
for vlan_mapping in self.vlan_manager:
if vlan_mapping.network_type == tunnel_type:
br.install_flood_to_tun(vlan_mapping.vlan,
vlan_mapping.segmentation_id,
ofports)
def setup_tunnel_port(self, br, remote_ip, network_type):
port_name = self.get_tunnel_name(
network_type, self.local_ip, remote_ip)
if port_name is None:
return 0
ofport = self._setup_tunnel_port(br,
port_name,
remote_ip,
network_type)
self._setup_tunnel_flood_flow(br, network_type)
return ofport
def cleanup_tunnel_port(self, br, tun_ofport, tunnel_type):
# Check if this tunnel port is still used
for lvm in self.vlan_manager:
if tun_ofport in lvm.tun_ofports:
break
# If not, remove it
else:
items = list(self.tun_br_ofports[tunnel_type].items())
for remote_ip, ofport in items:
if ofport == tun_ofport:
port_name = self.get_tunnel_name(
tunnel_type, self.local_ip, remote_ip)
br.delete_port(port_name)
br.cleanup_tunnel_port(ofport)
self.tun_br_ofports[tunnel_type].pop(remote_ip, None)
def treat_devices_added_or_updated(self, devices, provisioning_needed):
skipped_devices = []
need_binding_devices = []
binding_no_activated_devices = set()
devices_details_list = (
self.plugin_rpc.get_devices_details_list_and_failed_devices(
self.context,
devices,
self.agent_id,
self.conf.host))
failed_devices = set(devices_details_list.get('failed_devices'))
devices = devices_details_list.get('devices')
vif_by_id = self.int_br.get_vifs_by_ids(
[vif['device'] for vif in devices])
for details in devices:
device = details['device']
LOG.debug("Processing port: %s", device)
port = vif_by_id.get(device)
if not port:
# The port disappeared and cannot be processed
LOG.info("Port %s was not found on the integration bridge "
"and will therefore not be processed", device)
self.ext_manager.delete_port(self.context, {'port_id': device})
skipped_devices.append(device)
continue
if 'port_id' in details:
LOG.info("Port %(device)s updated. Details: %(details)s",
{'device': device, 'details': details})
details['vif_port'] = port
need_binding = self.treat_vif_port(port, details['port_id'],
details['network_id'],
details['network_type'],
details['physical_network'],
details['segmentation_id'],
details['admin_state_up'],
details['fixed_ips'],
details['device_owner'],
provisioning_needed)
if need_binding:
need_binding_devices.append(details)
self._update_port_network(details['port_id'],
details['network_id'])
self.ext_manager.handle_port(self.context, details)
else:
if c_const.NO_ACTIVE_BINDING in details:
# Port was added to the bridge, but its binding in this
# agent hasn't been activated yet. It will be treated as
# added when binding is activated
binding_no_activated_devices.add(device)
LOG.debug("Device %s has no active binding in host",
device)
else:
LOG.warning(
"Device %s not defined on plugin or binding failed",
device)
if (port and port.ofport != -1):
self.port_dead(port)
return (skipped_devices, binding_no_activated_devices,
need_binding_devices, failed_devices)
def _update_port_network(self, port_id, network_id):
self._clean_network_ports(port_id)
self.network_ports[network_id].add(port_id)
def treat_ancillary_devices_added(self, devices):
devices_details_list = (
self.plugin_rpc.get_devices_details_list_and_failed_devices(
self.context,
devices,
self.agent_id,
self.conf.host))
failed_devices = set(devices_details_list.get('failed_devices'))
devices_added = [
d['device'] for d in devices_details_list.get('devices')]
# update plugin about port status
devices_set_up = (
self.plugin_rpc.update_device_list(self.context,
devices_added,
[],
self.agent_id,
self.conf.host))
failed_devices |= set(devices_set_up.get('failed_devices_up'))
LOG.info("Ancillary Ports %(added)s added, failed devices "
"%(failed)s", {'added': devices, 'failed': failed_devices})
return failed_devices
def treat_devices_removed(self, devices):
self.sg_agent.remove_devices_filter(devices)
LOG.info("Ports %s removed", devices)
devices_down = self.plugin_rpc.update_device_list(self.context,
[],
devices,
self.agent_id,
self.conf.host)
failed_devices = set(devices_down.get('failed_devices_down'))
LOG.debug("Port removal failed for %s", failed_devices)
for device in devices:
self.ext_manager.delete_port(self.context, {'port_id': device})
self.port_unbound(device)
return failed_devices
def treat_ancillary_devices_removed(self, devices):
LOG.info("Ancillary ports %s removed", devices)
devices_down = self.plugin_rpc.update_device_list(self.context,
[],
devices,
self.agent_id,
self.conf.host)
LOG.info("Devices down %s ", devices_down)
failed_devices = set(devices_down.get('failed_devices_down'))
if failed_devices:
LOG.debug("Port removal failed for %s", failed_devices)
for detail in devices_down.get('devices_down'):
if detail['exists']:
LOG.info("Port %s updated.", detail['device'])
# Nothing to do regarding local networking
else:
LOG.debug("Device %s not defined on plugin", detail['device'])
return failed_devices
def treat_devices_skipped(self, devices):
LOG.info("Ports %s skipped, changing status to down", devices)
devices_down = self.plugin_rpc.update_device_list(self.context,
[],
devices,
self.agent_id,
self.conf.host)
failed_devices = set(devices_down.get('failed_devices_down'))
if failed_devices:
LOG.debug("Port down failed for %s", failed_devices)
def process_network_ports(self, port_info, provisioning_needed):
failed_devices = {'added': set(), 'removed': set()}
# TODO(salv-orlando): consider a solution for ensuring notifications
# are processed exactly in the same order in which they were
# received. This is tricky because there are two notification
# sources: the neutron server, and the ovs db monitor process
# If there is an exception while processing security groups ports
# will not be wired anyway, and a resync will be triggered
# VIF wiring needs to be performed always for 'new' devices.
# For updated ports, re-wiring is not needed in most cases, but needs
# to be performed anyway when the admin state of a device is changed.
# A device might be both in the 'added' and 'updated'
# list at the same time; avoid processing it twice.
devices_added_updated = (port_info.get('added', set()) |
port_info.get('updated', set()))
need_binding_devices = []
skipped_devices = set()
binding_no_activated_devices = set()
if devices_added_updated:
start = time.time()
(skipped_devices, binding_no_activated_devices,
need_binding_devices, failed_devices['added']) = (
self.treat_devices_added_or_updated(
devices_added_updated, provisioning_needed))
LOG.debug("process_network_ports - iteration:%(iter_num)d - "
"treat_devices_added_or_updated completed. "
"Skipped %(num_skipped)d and no activated binding "
"devices %(num_no_active_binding)d of %(num_current)d "
"devices currently available. "
"Time elapsed: %(elapsed).3f",
{'iter_num': self.iter_num,
'num_skipped': len(skipped_devices),
'num_no_active_binding':
len(binding_no_activated_devices),
'num_current': len(port_info['current']),
'elapsed': time.time() - start})
# Update the list of current ports storing only those which
# have been actually processed.
skipped_devices = set(skipped_devices)
port_info['current'] = (port_info['current'] - skipped_devices)
# TODO(salv-orlando): Optimize avoiding applying filters
# unnecessarily, (eg: when there are no IP address changes)
added_ports = (port_info.get('added', set()) - skipped_devices -
binding_no_activated_devices)
self._add_port_tag_info(need_binding_devices)
self.sg_agent.setup_port_filters(added_ports,
port_info.get('updated', set()))
failed_devices['added'] |= self._bind_devices(need_binding_devices)
if 'removed' in port_info and port_info['removed']:
start = time.time()
failed_devices['removed'] |= self.treat_devices_removed(
port_info['removed'])
LOG.debug("process_network_ports - iteration:%(iter_num)d - "
"treat_devices_removed completed in %(elapsed).3f",
{'iter_num': self.iter_num,
'elapsed': time.time() - start})
if skipped_devices:
start = time.time()
self.treat_devices_skipped(skipped_devices)
LOG.debug("process_network_ports - iteration:%(iter_num)d - "
"treat_devices_skipped completed in %(elapsed).3f",
{'iter_num': self.iter_num,
'elapsed': time.time() - start})
return failed_devices
def process_ancillary_network_ports(self, port_info):
failed_devices = {'added': set(), 'removed': set()}
if 'added' in port_info and port_info['added']:
start = time.time()
failed_added = self.treat_ancillary_devices_added(
port_info['added'])
LOG.debug("process_ancillary_network_ports - iteration: "
"%(iter_num)d - treat_ancillary_devices_added "
"completed in %(elapsed).3f",
{'iter_num': self.iter_num,
'elapsed': time.time() - start})
failed_devices['added'] = failed_added
if 'removed' in port_info and port_info['removed']:
start = time.time()
failed_removed = self.treat_ancillary_devices_removed(
port_info['removed'])
failed_devices['removed'] = failed_removed
LOG.debug("process_ancillary_network_ports - iteration: "
"%(iter_num)d - treat_ancillary_devices_removed "
"completed in %(elapsed).3f",
{'iter_num': self.iter_num,
'elapsed': time.time() - start})
return failed_devices
@classmethod
def get_tunnel_hash(cls, ip_address, hashlen):
try:
addr = netaddr.IPAddress(ip_address)
if addr.version == n_const.IP_VERSION_4:
# We cannot change this from 8, since it could break
# backwards-compatibility
return '%08x' % addr
else:
# Create 32-bit Base32 encoded hash
sha1 = hashlib.sha1(ip_address.encode())
iphash = base64.b32encode(sha1.digest())
return iphash[:hashlen].decode().lower()
except Exception:
LOG.warning("Invalid remote IP: %s", ip_address)
return
def tunnel_sync(self):
LOG.debug("Configuring tunnel endpoints to other OVS agents")
try:
for tunnel_type in self.tunnel_types:
details = self.plugin_rpc.tunnel_sync(self.context,
self.local_ip,
tunnel_type,
self.conf.host)
if not self.l2_pop:
tunnels = details['tunnels']
for tunnel in tunnels:
if self.local_ip != tunnel['ip_address']:
remote_ip = tunnel['ip_address']
tun_name = self.get_tunnel_name(
tunnel_type, self.local_ip, remote_ip)
if tun_name is None:
continue
self._setup_tunnel_port(self.tun_br,
tun_name,
tunnel['ip_address'],
tunnel_type)
self._setup_tunnel_flood_flow(self.tun_br, tunnel_type)
except Exception as e:
LOG.debug("Unable to sync tunnel IP %(local_ip)s: %(e)s",
{'local_ip': self.local_ip, 'e': e})
return True
return False
@classmethod
def get_tunnel_name(cls, network_type, local_ip, remote_ip):
# This string is used to build port and interface names in OVS.
# Port and interface names can be max 16 characters long,
# including NULL, and must be unique per table per host.
# We make the name as long as possible given the network_type,
# for example, 'vxlan-012345678' or 'geneve-01234567'.
# Remove length of network type and dash
hashlen = n_const.DEVICE_NAME_MAX_LEN - len(network_type) - 1
remote_tunnel_hash = cls.get_tunnel_hash(remote_ip, hashlen)
if not remote_tunnel_hash:
return None
return '%s-%s' % (network_type, remote_tunnel_hash)
def _agent_has_updates(self, polling_manager):
return (polling_manager.is_polling_required or
self.updated_ports or
self.deleted_ports or
self.deactivated_bindings or
self.activated_bindings or
self.sg_agent.firewall_refresh_needed())
def _port_info_has_changes(self, port_info):
return (port_info.get('added') or
port_info.get('removed') or
port_info.get('updated'))
def check_ovs_status(self):
try:
# Check for the canary flow
status = self.int_br.check_canary_table()
except Exception:
LOG.exception("Failure while checking for the canary flow")
status = constants.OVS_DEAD
if status == constants.OVS_RESTARTED:
LOG.warning("OVS is restarted. OVSNeutronAgent will reset "
"bridges and recover ports.")
elif status == constants.OVS_DEAD:
LOG.warning("OVS is dead. OVSNeutronAgent will keep running "
"and checking OVS status periodically.")
return status
def loop_count_and_wait(self, start_time, port_stats):
# sleep till end of polling interval
elapsed = time.time() - start_time
LOG.debug("Agent rpc_loop - iteration:%(iter_num)d "
"completed. Processed ports statistics: "
"%(port_stats)s. Elapsed:%(elapsed).3f",
{'iter_num': self.iter_num,
'port_stats': port_stats,
'elapsed': elapsed})
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})
self.iter_num = self.iter_num + 1
def get_port_stats(self, port_info, ancillary_port_info):
port_stats = {
'regular': {
'added': len(port_info.get('added', [])),
'updated': len(port_info.get('updated', [])),
'removed': len(port_info.get('removed', []))}}
if self.ancillary_brs:
port_stats['ancillary'] = {
'added': len(ancillary_port_info.get('added', [])),
'removed': len(ancillary_port_info.get('removed', []))}
return port_stats
def cleanup_stale_flows(self):
bridges = [self.int_br]
bridges.extend(self.phys_brs.values())
if self.enable_tunneling:
bridges.append(self.tun_br)
for bridge in bridges:
LOG.info("Cleaning stale %s flows", bridge.br_name)
bridge.cleanup_flows()
def process_port_info(self, start, polling_manager, sync, ovs_restarted,
ports, ancillary_ports, updated_ports_copy,
consecutive_resyncs, ports_not_ready_yet,
failed_devices, failed_ancillary_devices):
# There are polling managers that don't have get_events, e.g.
# AlwaysPoll used by windows implementations
# REVISIT (rossella_s) This needs to be reworked to hide implementation
# details regarding polling in BasePollingManager subclasses
if sync or not (hasattr(polling_manager, 'get_events')):
if sync:
LOG.info("Agent out of sync with plugin!")
consecutive_resyncs = consecutive_resyncs + 1
if (consecutive_resyncs >=
constants.MAX_DEVICE_RETRIES):
LOG.warning(
"Clearing cache of registered ports,"
" retries to resync were > %s",
constants.MAX_DEVICE_RETRIES)
ports.clear()
ancillary_ports.clear()
consecutive_resyncs = 0
else:
consecutive_resyncs = 0
# TODO(rossella_s): For implementations that use AlwaysPoll
# resync if a device failed. This can be improved in future
sync = (any(failed_devices.values()) or
any(failed_ancillary_devices.values()))
# NOTE(rossella_s) don't empty the queue of events
# calling polling_manager.get_events() since
# the agent might miss some event (for example a port
# deletion)
reg_ports = (set() if ovs_restarted else ports)
port_info = self.scan_ports(reg_ports, sync,
updated_ports_copy)
# Treat ancillary devices if they exist
if self.ancillary_brs:
ancillary_port_info = self.scan_ancillary_ports(
ancillary_ports, sync)
LOG.debug("Agent rpc_loop - iteration:%(iter_num)d"
" - ancillary port info retrieved. "
"Elapsed:%(elapsed).3f",
{'iter_num': self.iter_num,
'elapsed': time.time() - start})
else:
ancillary_port_info = {}
else:
consecutive_resyncs = 0
events = polling_manager.get_events()
port_info, ancillary_port_info, ports_not_ready_yet = (
self.process_ports_events(events, ports, ancillary_ports,
ports_not_ready_yet,
failed_devices,
failed_ancillary_devices,
updated_ports_copy))
registry.notify(
constants.OVSDB_RESOURCE,
callback_events.AFTER_READ,
self,
ovsdb_events=events)
return (port_info, ancillary_port_info, consecutive_resyncs,
ports_not_ready_yet)
def _remove_devices_not_to_retry(self, failed_devices,
failed_ancillary_devices,
devices_not_to_retry,
ancillary_devices_not_to_retry):
"""This method removes the devices that exceeded the number of retries
from failed_devices and failed_ancillary_devices
"""
for event in ['added', 'removed']:
failed_devices[event] = (
failed_devices[event] - devices_not_to_retry[event])
failed_ancillary_devices[event] = (
failed_ancillary_devices[event] -
ancillary_devices_not_to_retry[event])
def _get_devices_not_to_retry(self, failed_devices,
failed_ancillary_devices,
failed_devices_retries_map):
"""Return the devices not to retry and update the retries map"""
new_failed_devices_retries_map = {}
devices_not_to_retry = {}
ancillary_devices_not_to_retry = {}
def _increase_retries(devices_set):
devices_not_to_retry = set()
for dev in devices_set:
retries = failed_devices_retries_map.get(dev, 0)
if retries >= constants.MAX_DEVICE_RETRIES:
devices_not_to_retry.add(dev)
LOG.warning(
"Device %(dev)s failed for %(times)s times and won't "
"be retried anymore", {
'dev': dev, 'times': constants.MAX_DEVICE_RETRIES})
else:
new_failed_devices_retries_map[dev] = retries + 1
return devices_not_to_retry
for event in ['added', 'removed']:
devices_not_to_retry[event] = _increase_retries(
failed_devices[event])
ancillary_devices_not_to_retry[event] = _increase_retries(
failed_ancillary_devices[event])
return (new_failed_devices_retries_map, devices_not_to_retry,
ancillary_devices_not_to_retry)
def update_retries_map_and_remove_devs_not_to_retry(
self, failed_devices, failed_ancillary_devices,
failed_devices_retries_map):
(new_failed_devices_retries_map, devices_not_to_retry,
ancillary_devices_not_to_retry) = self._get_devices_not_to_retry(
failed_devices, failed_ancillary_devices,
failed_devices_retries_map)
self._remove_devices_not_to_retry(
failed_devices, failed_ancillary_devices, devices_not_to_retry,
ancillary_devices_not_to_retry)
return new_failed_devices_retries_map
def _handle_ovs_restart(self, polling_manager):
self.setup_integration_br()
self.setup_physical_bridges(self.bridge_mappings)
if self.enable_tunneling:
self._reset_tunnel_ofports()
self.setup_tunnel_br()
self.setup_tunnel_br_flows()
self.agent_state['start_flag'] = True
# Force state report to avoid race condition
# with l2pop fdb entries update
self._report_state()
if self.enable_distributed_routing:
self.dvr_agent.reset_ovs_parameters(self.int_br,
self.tun_br,
self.patch_int_ofport,
self.patch_tun_ofport)
self.dvr_agent.reset_dvr_parameters()
self.dvr_agent.setup_dvr_flows()
# notify that OVS has restarted
registry.notify(
callback_resources.AGENT,
callback_events.OVS_RESTARTED,
self)
# restart the polling manager so that it will signal as added
# all the current ports
# REVISIT (rossella_s) Define a method "reset" in
# BasePollingManager that will be implemented by AlwaysPoll as
# no action and by InterfacePollingMinimizer as start/stop
if isinstance(
polling_manager, polling.InterfacePollingMinimizer):
polling_manager.stop()
polling_manager.start()
def rpc_loop(self, polling_manager):
idl_monitor = self.ovs.ovsdb.idl_monitor
sync = False
ports = set()
updated_ports_copy = set()
activated_bindings_copy = set()
ancillary_ports = set()
tunnel_sync = True
ovs_restarted = False
consecutive_resyncs = 0
need_clean_stale_flow = True
ports_not_ready_yet = set()
failed_devices = {'added': set(), 'removed': set()}
failed_ancillary_devices = {'added': set(), 'removed': set()}
failed_devices_retries_map = {}
while self._check_and_handle_signal():
if self.fullsync:
LOG.info("rpc_loop doing a full sync.")
sync = True
self.fullsync = False
port_info = {}
ancillary_port_info = {}
start = time.time()
LOG.debug("Agent rpc_loop - iteration:%d started",
self.iter_num)
ovs_status = self.check_ovs_status()
if ovs_status == constants.OVS_RESTARTED:
self._handle_ovs_restart(polling_manager)
tunnel_sync = self.enable_tunneling or tunnel_sync
elif ovs_status == constants.OVS_DEAD:
# Agent doesn't apply any operations when ovs is dead, to
# prevent unexpected failure or crash. Sleep and continue
# loop in which ovs status will be checked periodically.
port_stats = self.get_port_stats({}, {})
self.loop_count_and_wait(start, port_stats)
continue
# Check if any physical bridge wasn't recreated recently
bridges_recreated = self._reconfigure_physical_bridges(
idl_monitor.bridges_added)
sync |= bridges_recreated
# Notify the plugin of tunnel IP
if self.enable_tunneling and tunnel_sync:
try:
tunnel_sync = self.tunnel_sync()
except Exception:
LOG.exception("Error while configuring tunnel endpoints")
tunnel_sync = True
ovs_restarted |= (ovs_status == constants.OVS_RESTARTED)
devices_need_retry = (any(failed_devices.values()) or
any(failed_ancillary_devices.values()) or
ports_not_ready_yet)
if (self._agent_has_updates(polling_manager) or sync or
devices_need_retry):
try:
LOG.debug("Agent rpc_loop - iteration:%(iter_num)d - "
"starting polling. Elapsed:%(elapsed).3f",
{'iter_num': self.iter_num,
'elapsed': time.time() - start})
# Save updated ports dict to perform rollback in
# case resync would be needed, and then clear
# self.updated_ports. As the greenthread should not yield
# between these two statements, this will be thread-safe
updated_ports_copy = self.updated_ports
self.updated_ports = set()
activated_bindings_copy = self.activated_bindings
self.activated_bindings = set()
(port_info, ancillary_port_info, consecutive_resyncs,
ports_not_ready_yet) = (self.process_port_info(
start, polling_manager, sync, ovs_restarted,
ports, ancillary_ports, updated_ports_copy,
consecutive_resyncs, ports_not_ready_yet,
failed_devices, failed_ancillary_devices))
sync = False
self.process_deleted_ports(port_info)
self.process_deactivated_bindings(port_info)
self.process_activated_bindings(port_info,
activated_bindings_copy)
ofport_changed_ports = self.update_stale_ofport_rules()
if ofport_changed_ports:
port_info.setdefault('updated', set()).update(
ofport_changed_ports)
LOG.debug("Agent rpc_loop - iteration:%(iter_num)d - "
"port information retrieved. "
"Elapsed:%(elapsed).3f",
{'iter_num': self.iter_num,
'elapsed': time.time() - start})
# Secure and wire/unwire VIFs and update their status
# on Neutron server
if (self._port_info_has_changes(port_info) or
self.sg_agent.firewall_refresh_needed() or
ovs_restarted):
LOG.debug("Starting to process devices in:%s",
port_info)
provisioning_needed = (
ovs_restarted or bridges_recreated)
failed_devices = self.process_network_ports(
port_info, provisioning_needed)
if need_clean_stale_flow:
self.cleanup_stale_flows()
need_clean_stale_flow = False
LOG.debug("Agent rpc_loop - iteration:%(iter_num)d - "
"ports processed. Elapsed:%(elapsed).3f",
{'iter_num': self.iter_num,
'elapsed': time.time() - start})
ports = port_info['current']
if self.ancillary_brs:
failed_ancillary_devices = (
self.process_ancillary_network_ports(
ancillary_port_info))
LOG.debug("Agent rpc_loop - iteration: "
"%(iter_num)d - ancillary ports "
"processed. Elapsed:%(elapsed).3f",
{'iter_num': self.iter_num,
'elapsed': time.time() - start})
ancillary_ports = ancillary_port_info['current']
polling_manager.polling_completed()
failed_devices_retries_map = (
self.update_retries_map_and_remove_devs_not_to_retry(
failed_devices, failed_ancillary_devices,
failed_devices_retries_map))
# Keep this flag in the last line of "try" block,
# so we can sure that no other Exception occurred.
ovs_restarted = False
self._dispose_local_vlan_hints()
except Exception:
LOG.exception("Error while processing VIF ports")
# Put the ports back in self.updated_port
self.updated_ports |= updated_ports_copy
self.activated_bindings |= activated_bindings_copy
sync = True
port_stats = self.get_port_stats(port_info, ancillary_port_info)
self.loop_count_and_wait(start, port_stats)
def daemon_loop(self):
# Start everything.
LOG.info("Agent initialized successfully, now running... ")
signal.signal(signal.SIGTERM, self._handle_sigterm)
if hasattr(signal, 'SIGHUP'):
signal.signal(signal.SIGHUP, self._handle_sighup)
br_names = [br.br_name for br in self.phys_brs.values()]
self.ovs.ovsdb.idl_monitor.start_bridge_monitor(br_names)
with polling.get_polling_manager(
self.minimize_polling,
self.ovsdb_monitor_respawn_interval) as pm:
self.rpc_loop(polling_manager=pm)
def _handle_sigterm(self, signum, frame):
self.catch_sigterm = True
if self.quitting_rpc_timeout:
LOG.info(
'SIGTERM received, capping RPC timeout by %d seconds.',
self.quitting_rpc_timeout)
self.set_rpc_timeout(self.quitting_rpc_timeout)
def _handle_sighup(self, signum, frame):
self.catch_sighup = True
def _check_and_handle_signal(self):
if self.catch_sigterm:
LOG.info("Agent caught SIGTERM, quitting daemon loop.")
self.run_daemon_loop = False
self.catch_sigterm = False
if self.catch_sighup:
LOG.info("Agent caught SIGHUP, resetting.")
self.conf.mutate_config_files()
config.setup_logging()
LOG.debug('Full set of CONF:')
self.conf.log_opt_values(LOG, logging.DEBUG)
self.catch_sighup = False
return self.run_daemon_loop
def set_rpc_timeout(self, timeout):
for rpc_api in (self.plugin_rpc, self.sg_plugin_rpc,
self.dvr_plugin_rpc, self.state_rpc):
rpc_api.client.set_max_timeout(timeout)
def _check_agent_configurations(self):
if (self.enable_distributed_routing and self.enable_tunneling and
not self.l2_pop):
raise ValueError(_("DVR deployments for VXLAN/GRE/Geneve "
"underlays require L2-pop to be enabled, "
"in both the Agent and Server side."))
def validate_local_ip(local_ip):
"""Verify if the ip exists on the agent's host."""
if not ip_lib.IPWrapper().get_device_by_ip(local_ip):
LOG.error("Tunneling can't be enabled with invalid local_ip '%s'."
" IP couldn't be found on this host's interfaces.",
local_ip)
raise SystemExit(1)
def validate_tunnel_config(tunnel_types, local_ip):
"""Verify local ip and tunnel config if tunneling is enabled."""
if not tunnel_types:
return
validate_local_ip(local_ip)
for tun in tunnel_types:
if tun not in constants.TUNNEL_NETWORK_TYPES:
LOG.error('Invalid tunnel type specified: %s', tun)
raise SystemExit(1)
def prepare_xen_compute():
is_xen_compute_host = 'rootwrap-xen-dom0' in cfg.CONF.AGENT.root_helper \
or xenapi_root_helper.ROOT_HELPER_DAEMON_TOKEN == \
cfg.CONF.AGENT.root_helper_daemon
if is_xen_compute_host:
xenapi_conf.register_xenapi_opts()
# Force ip_lib to always use the root helper to ensure that ip
# commands target xen dom0 rather than domU.
cfg.CONF.register_opts(ip_lib.OPTS)
cfg.CONF.set_default('ip_lib_force_root', True)
def main(bridge_classes):
prepare_xen_compute()
ovs_capabilities.register()
ext_manager.register_opts(cfg.CONF)
agent_config.setup_privsep()
service_conf.register_service_opts(service_conf.RPC_EXTRA_OPTS, cfg.CONF)
ext_mgr = ext_manager.L2AgentExtensionsManager(cfg.CONF)
# now that all extensions registered their options, we can log them
n_utils.log_opt_values(LOG)
validate_tunnel_config(cfg.CONF.AGENT.tunnel_types, cfg.CONF.OVS.local_ip)
try:
agent = OVSNeutronAgent(bridge_classes, ext_mgr, cfg.CONF)
capabilities.notify_init_event(n_const.AGENT_TYPE_OVS, agent)
except (RuntimeError, ValueError) as e:
LOG.error("%s Agent terminated!", e)
sys.exit(1)
agent.daemon_loop()
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