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It seems that the code has changed since Ocata.
cat /usr/lib/python2.7/dist-packages/neutron/agent/linux/ip_lib.py
--------------------------------------------------------------------------------------
...
# NOTE(haleyb): These neighbour functions live outside the IpNeighCommand
# class since not all callers require it.
def add_neigh_entry(ip_address, mac_address, device, namespace=None, **kwargs):
"""Add a neighbour entry.
:param ip_address: IP address of entry to add
:param mac_address: MAC address of entry to add
:param device: Device name to use in adding entry
:param namespace: The name of the namespace in which to add the entry
"""
ip_version = get_ip_version(ip_address)
privileged.add_neigh_entry(ip_version,
ip_address,
mac_address,
device,
namespace,
**kwargs)
...
..
--------------------------------------------------------------------------------------
If you set arp_responder=true, you will encounter the following error:
--------------------------------------------------------------------------------------
2018-03-09 12:35:54.590 2317 INFO neutron.agent.securitygroups_rpc
[req-13215026-d027-4dff-830c-8c01a3e24b7e - - - - -] Refresh firewall rules
2018-03-09 12:35:54.723 2317 INFO oslo.privsep.daemon
[req-ffd165f2-9b17-49f4-9729-f75ab05f4f63 - - - - -] Running privsep helper:
['sudo', 'privsep-helper', '--config-file', '/etc/neutron/neutron.conf',
'--config-file', '/etc/neutron/plugins/ml2/linuxbridge_agent.ini',
'--privsep_context', 'neutron.privileged.default', '--privsep_sock_path',
'/tmp/tmpOymdtx/privsep.sock']
2018-03-09 12:35:54.737 2317 WARNING oslo.privsep.daemon [-] privsep log: sudo:
no tty present and no askpass program specified
2018-03-09 12:35:54.749 2317 CRITICAL oslo.privsep.daemon
[req-ffd165f2-9b17-49f4-9729-f75ab05f4f63 - - - - -] privsep helper command
exited non-zero (1)
2018-03-09 12:35:54.750 2317 ERROR oslo_messaging.rpc.server
[req-ffd165f2-9b17-49f4-9729-f75ab05f4f63 - - - - -] Exception during message
handling: FailedToDropPrivileges: privsep helper command exited non-zero (1)
2018-03-09 12:35:54.750 2317 ERROR oslo_messaging.rpc.server Traceback (most
recent call last):
2018-03-09 12:35:54.750 2317 ERROR oslo_messaging.rpc.server File
"/usr/lib/python2.7/dist-packages/oslo_messaging/rpc/server.py", line 160, in
_process_incoming
2018-03-09 12:35:54.750 2317 ERROR oslo_messaging.rpc.server res =
self.dispatcher.dispatch(message)
2018-03-09 12:35:54.750 2317 ERROR oslo_messaging.rpc.server File
"/usr/lib/python2.7/dist-packages/oslo_messaging/rpc/dispatcher.py", line 213,
in dispatch
2018-03-09 12:35:54.750 2317 ERROR oslo_messaging.rpc.server return
self._do_dispatch(endpoint, method, ctxt, args)
2018-03-09 12:35:54.750 2317 ERROR oslo_messaging.rpc.server File
"/usr/lib/python2.7/dist-packages/oslo_messaging/rpc/dispatcher.py", line 183,
in _do_dispatch
2018-03-09 12:35:54.750 2317 ERROR oslo_messaging.rpc.server result =
func(ctxt, **new_args)
2018-03-09 12:35:54.750 2317 ERROR oslo_messaging.rpc.server File
"/usr/lib/python2.7/dist-packages/oslo_log/helpers.py", line 67, in wrapper
2018-03-09 12:35:54.750 2317 ERROR oslo_messaging.rpc.server return
method(*args, **kwargs)
2018-03-09 12:35:54.750 2317 ERROR oslo_messaging.rpc.server File
"/usr/lib/python2.7/dist-packages/neutron/plugins/ml2/drivers/l2pop/rpc_manager/l2population_rpc.py",
line 41, in add_fdb_entries
2018-03-09 12:35:54.750 2317 ERROR oslo_messaging.rpc.server
self.fdb_add(context, self._unmarshall_fdb_entries(fdb_entries))
2018-03-09 12:35:54.750 2317 ERROR oslo_messaging.rpc.server File
"/usr/lib/python2.7/dist-packages/neutron/plugins/ml2/drivers/linuxbridge/agent/linuxbridge_neutron_agent.py",
line 895, in fdb_add
2018-03-09 12:35:54.750 2317 ERROR oslo_messaging.rpc.server interface)
2018-03-09 12:35:54.750 2317 ERROR oslo_messaging.rpc.server File
"/usr/lib/python2.7/dist-packages/neutron/plugins/ml2/drivers/linuxbridge/agent/linuxbridge_neutron_agent.py",
line 746, in add_fdb_entries
2018-03-09 12:35:54.750 2317 ERROR oslo_messaging.rpc.server
self.add_fdb_ip_entry(mac, ip, interface)
2018-03-09 12:35:54.750 2317 ERROR oslo_messaging.rpc.server File
"/usr/lib/python2.7/dist-packages/neutron/plugins/ml2/drivers/linuxbridge/agent/linuxbridge_neutron_agent.py",
line 737, in add_fdb_ip_entry
2018-03-09 12:35:54.750 2317 ERROR oslo_messaging.rpc.server
ip_lib.add_neigh_entry(ip, mac, interface)
2018-03-09 12:35:54.750 2317 ERROR oslo_messaging.rpc.server File
"/usr/lib/python2.7/dist-packages/neutron/agent/linux/ip_lib.py", line 997, in
add_neigh_entry
2018-03-09 12:35:54.750 2317 ERROR oslo_messaging.rpc.server **kwargs)
2018-03-09 12:35:54.750 2317 ERROR oslo_messaging.rpc.server File
"/usr/lib/python2.7/dist-packages/oslo_privsep/priv_context.py", line 204, in
_wrap
2018-03-09 12:35:54.750 2317 ERROR oslo_messaging.rpc.server self.start()
2018-03-09 12:35:54.750 2317 ERROR oslo_messaging.rpc.server File
"/usr/lib/python2.7/dist-packages/oslo_privsep/priv_context.py", line 215, in
start
2018-03-09 12:35:54.750 2317 ERROR oslo_messaging.rpc.server channel =
daemon.RootwrapClientChannel(context=self)
2018-03-09 12:35:54.750 2317 ERROR oslo_messaging.rpc.server File
"/usr/lib/python2.7/dist-packages/oslo_privsep/daemon.py", line 327, in __init__
2018-03-09 12:35:54.750 2317 ERROR oslo_messaging.rpc.server raise
FailedToDropPrivileges(msg)
2018-03-09 12:35:54.750 2317 ERROR oslo_messaging.rpc.server
FailedToDropPrivileges: privsep helper command exited non-zero (1)
2018-03-09 12:35:54.750 2317 ERROR oslo_messaging.rpc.server
--------------------------------------------------------------------------------------
** Affects: neutron
Importance: Undecided
Status: New
--
Arp_responder function has failed since Ocata
https://bugs.launchpad.net/bugs/1754563
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