Public bug reported:
neutron-vpn-agent can generate stack traces with AttributeError:
'NoneType' object has no attribute 'ipv4' in two different locations in
ipsec.py, in add_nat_rule() and remove_nat_rule(), during sync()
operations while site connections are being created.
Here is an example stack trace (based on a Liberty distribution, but I
believe this is still an issue in master/newton):
2016-04-26 20:26:27.894 28022 ERROR oslo_messaging.rpc.dispatcher Traceback
(most recent call last):
2016-04-26 20:26:27.894 28022 ERROR oslo_messaging.rpc.dispatcher File
"/opt/stack/venv/neutron-20160426T025546Z/lib/python2.7/site-packages/oslo_messaging/rpc/dispatcher.py",
line 142, in _dispatch_and_reply
2016-04-26 20:26:27.894 28022 ERROR oslo_messaging.rpc.dispatcher
executor_callback))
2016-04-26 20:26:27.894 28022 ERROR oslo_messaging.rpc.dispatcher File
"/opt/stack/venv/neutron-20160426T025546Z/lib/python2.7/site-packages/oslo_messaging/rpc/dispatcher.py",
line 186, in _dispatch
2016-04-26 20:26:27.894 28022 ERROR oslo_messaging.rpc.dispatcher
executor_callback)
2016-04-26 20:26:27.894 28022 ERROR oslo_messaging.rpc.dispatcher File
"/opt/stack/venv/neutron-20160426T025546Z/lib/python2.7/site-packages/oslo_messaging/rpc/dispatcher.py",
line 129, in _do_dispatch
2016-04-26 20:26:27.894 28022 ERROR oslo_messaging.rpc.dispatcher result =
func(ctxt, **new_args)
2016-04-26 20:26:27.894 28022 ERROR oslo_messaging.rpc.dispatcher File
"/opt/stack/venv/neutron-20160426T025546Z/lib/python2.7/site-packages/neutron_vpnaas/services/vpn/device_drivers/ipsec.py",
line 675, in vpnservice_updated
2016-04-26 20:26:27.894 28022 ERROR oslo_messaging.rpc.dispatcher
self.sync(context, [router] if router else [])
2016-04-26 20:26:27.894 28022 ERROR oslo_messaging.rpc.dispatcher File
"/opt/stack/venv/neutron-20160426T025546Z/lib/python2.7/site-packages/oslo_concurrency/lockutils.py",
line 271, in inner
2016-04-26 20:26:27.894 28022 ERROR oslo_messaging.rpc.dispatcher return
f(*args, **kwargs)
2016-04-26 20:26:27.894 28022 ERROR oslo_messaging.rpc.dispatcher File
"/opt/stack/venv/neutron-20160426T025546Z/lib/python2.7/site-packages/neutron_vpnaas/services/vpn/device_drivers/ipsec.py",
line 830, in sync
2016-04-26 20:26:27.894 28022 ERROR oslo_messaging.rpc.dispatcher
self._delete_vpn_processes(sync_router_ids, router_ids)
2016-04-26 20:26:27.894 28022 ERROR oslo_messaging.rpc.dispatcher File
"/opt/stack/venv/neutron-20160426T025546Z/lib/python2.7/site-packages/neutron_vpnaas/services/vpn/device_drivers/ipsec.py",
line 860, in _delete_vpn_processes
2016-04-26 20:26:27.894 28022 ERROR oslo_messaging.rpc.dispatcher
self.destroy_process(process_id)
2016-04-26 20:26:27.894 28022 ERROR oslo_messaging.rpc.dispatcher File
"/opt/stack/venv/neutron-20160426T025546Z/lib/python2.7/site-packages/neutron_vpnaas/services/vpn/device_drivers/ipsec.py",
line 728, in destroy_process
2016-04-26 20:26:27.894 28022 ERROR oslo_messaging.rpc.dispatcher
self._update_nat(vpnservice, self.remove_nat_rule)
2016-04-26 20:26:27.894 28022 ERROR oslo_messaging.rpc.dispatcher File
"/opt/stack/venv/neutron-20160426T025546Z/lib/python2.7/site-packages/neutron_vpnaas/services/vpn/device_drivers/ipsec.py",
line 664, in _update_nat
2016-04-26 20:26:27.894 28022 ERROR oslo_messaging.rpc.dispatcher top=True)
2016-04-26 20:26:27.894 28022 ERROR oslo_messaging.rpc.dispatcher File
"/opt/stack/venv/neutron-20160426T025546Z/lib/python2.7/site-packages/neutron_vpnaas/services/vpn/device_drivers/ipsec.py",
line 629, in remove_nat_rule
2016-04-26 20:26:27.894 28022 ERROR oslo_messaging.rpc.dispatcher
iptables_manager.ipv4['nat'].remove_rule(chain, rule, top=top)
2016-04-26 20:26:27.894 28022 ERROR oslo_messaging.rpc.dispatcher
AttributeError: 'NoneType' object has no attribute 'ipv4'
2016-04-26 20:26:27.894 28022 ERROR oslo_messaging.rpc.dispatcher
** Affects: neutron
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1575402
Title:
VPNaaS update NAT rules can generate stack trace
Status in neutron:
New
Bug description:
neutron-vpn-agent can generate stack traces with AttributeError:
'NoneType' object has no attribute 'ipv4' in two different locations
in ipsec.py, in add_nat_rule() and remove_nat_rule(), during sync()
operations while site connections are being created.
Here is an example stack trace (based on a Liberty distribution, but I
believe this is still an issue in master/newton):
2016-04-26 20:26:27.894 28022 ERROR oslo_messaging.rpc.dispatcher Traceback
(most recent call last):
2016-04-26 20:26:27.894 28022 ERROR oslo_messaging.rpc.dispatcher File
"/opt/stack/venv/neutron-20160426T025546Z/lib/python2.7/site-packages/oslo_messaging/rpc/dispatcher.py",
line 142, in _dispatch_and_reply
2016-04-26 20:26:27.894 28022 ERROR oslo_messaging.rpc.dispatcher
executor_callback))
2016-04-26 20:26:27.894 28022 ERROR oslo_messaging.rpc.dispatcher File
"/opt/stack/venv/neutron-20160426T025546Z/lib/python2.7/site-packages/oslo_messaging/rpc/dispatcher.py",
line 186, in _dispatch
2016-04-26 20:26:27.894 28022 ERROR oslo_messaging.rpc.dispatcher
executor_callback)
2016-04-26 20:26:27.894 28022 ERROR oslo_messaging.rpc.dispatcher File
"/opt/stack/venv/neutron-20160426T025546Z/lib/python2.7/site-packages/oslo_messaging/rpc/dispatcher.py",
line 129, in _do_dispatch
2016-04-26 20:26:27.894 28022 ERROR oslo_messaging.rpc.dispatcher result
= func(ctxt, **new_args)
2016-04-26 20:26:27.894 28022 ERROR oslo_messaging.rpc.dispatcher File
"/opt/stack/venv/neutron-20160426T025546Z/lib/python2.7/site-packages/neutron_vpnaas/services/vpn/device_drivers/ipsec.py",
line 675, in vpnservice_updated
2016-04-26 20:26:27.894 28022 ERROR oslo_messaging.rpc.dispatcher
self.sync(context, [router] if router else [])
2016-04-26 20:26:27.894 28022 ERROR oslo_messaging.rpc.dispatcher File
"/opt/stack/venv/neutron-20160426T025546Z/lib/python2.7/site-packages/oslo_concurrency/lockutils.py",
line 271, in inner
2016-04-26 20:26:27.894 28022 ERROR oslo_messaging.rpc.dispatcher return
f(*args, **kwargs)
2016-04-26 20:26:27.894 28022 ERROR oslo_messaging.rpc.dispatcher File
"/opt/stack/venv/neutron-20160426T025546Z/lib/python2.7/site-packages/neutron_vpnaas/services/vpn/device_drivers/ipsec.py",
line 830, in sync
2016-04-26 20:26:27.894 28022 ERROR oslo_messaging.rpc.dispatcher
self._delete_vpn_processes(sync_router_ids, router_ids)
2016-04-26 20:26:27.894 28022 ERROR oslo_messaging.rpc.dispatcher File
"/opt/stack/venv/neutron-20160426T025546Z/lib/python2.7/site-packages/neutron_vpnaas/services/vpn/device_drivers/ipsec.py",
line 860, in _delete_vpn_processes
2016-04-26 20:26:27.894 28022 ERROR oslo_messaging.rpc.dispatcher
self.destroy_process(process_id)
2016-04-26 20:26:27.894 28022 ERROR oslo_messaging.rpc.dispatcher File
"/opt/stack/venv/neutron-20160426T025546Z/lib/python2.7/site-packages/neutron_vpnaas/services/vpn/device_drivers/ipsec.py",
line 728, in destroy_process
2016-04-26 20:26:27.894 28022 ERROR oslo_messaging.rpc.dispatcher
self._update_nat(vpnservice, self.remove_nat_rule)
2016-04-26 20:26:27.894 28022 ERROR oslo_messaging.rpc.dispatcher File
"/opt/stack/venv/neutron-20160426T025546Z/lib/python2.7/site-packages/neutron_vpnaas/services/vpn/device_drivers/ipsec.py",
line 664, in _update_nat
2016-04-26 20:26:27.894 28022 ERROR oslo_messaging.rpc.dispatcher
top=True)
2016-04-26 20:26:27.894 28022 ERROR oslo_messaging.rpc.dispatcher File
"/opt/stack/venv/neutron-20160426T025546Z/lib/python2.7/site-packages/neutron_vpnaas/services/vpn/device_drivers/ipsec.py",
line 629, in remove_nat_rule
2016-04-26 20:26:27.894 28022 ERROR oslo_messaging.rpc.dispatcher
iptables_manager.ipv4['nat'].remove_rule(chain, rule, top=top)
2016-04-26 20:26:27.894 28022 ERROR oslo_messaging.rpc.dispatcher
AttributeError: 'NoneType' object has no attribute 'ipv4'
2016-04-26 20:26:27.894 28022 ERROR oslo_messaging.rpc.dispatcher
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