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[Bug 1352893] [NEW] ipv6 cannot be disabled for ovs agent

To: yahoo-eng-team@xxxxxxxxxxxxxxxxxxx
From: Jakub Libosvar <libosvar@xxxxxxxxxx>
Date: Tue, 05 Aug 2014 13:25:21 -0000
Reply-to: Bug 1352893 <1352893@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx
Public bug reported:

If ipv6 module is not loaded in kernel ip6tables command doesn't work
and fails  in openvswitch-agent when processing ports:

2014-08-05 15:20:57.089 3944 ERROR neutron.plugins.openvswitch.agent.ovs_neutron_agent [-] Error while processing VIF ports
2014-08-05 15:20:57.089 3944 TRACE neutron.plugins.openvswitch.agent.ovs_neutron_agent Traceback (most recent call last):
2014-08-05 15:20:57.089 3944 TRACE neutron.plugins.openvswitch.agent.ovs_neutron_agent   File "/usr/lib/python2.7/site-packages/neutron/plugins/openvswitch/agent/ovs_neutron_agent.py", line 1262, in rpc_loop
2014-08-05 15:20:57.089 3944 TRACE neutron.plugins.openvswitch.agent.ovs_neutron_agent     ovs_restarted)
2014-08-05 15:20:57.089 3944 TRACE neutron.plugins.openvswitch.agent.ovs_neutron_agent   File "/usr/lib/python2.7/site-packages/neutron/plugins/openvswitch/agent/ovs_neutron_agent.py", line 1090, in process_network_ports
2014-08-05 15:20:57.089 3944 TRACE neutron.plugins.openvswitch.agent.ovs_neutron_agent     port_info.get('updated', set()))
2014-08-05 15:20:57.089 3944 TRACE neutron.plugins.openvswitch.agent.ovs_neutron_agent   File "/usr/lib/python2.7/site-packages/neutron/agent/securitygroups_rpc.py", line 247, in setup_port_filters
2014-08-05 15:20:57.089 3944 TRACE neutron.plugins.openvswitch.agent.ovs_neutron_agent     self.prepare_devices_filter(new_devices)
2014-08-05 15:20:57.089 3944 TRACE neutron.plugins.openvswitch.agent.ovs_neutron_agent   File "/usr/lib/python2.7/site-packages/neutron/agent/securitygroups_rpc.py", line 164, in prepare_devices_filter
2014-08-05 15:20:57.089 3944 TRACE neutron.plugins.openvswitch.agent.ovs_neutron_agent     self.firewall.prepare_port_filter(device)
2014-08-05 15:20:57.089 3944 TRACE neutron.plugins.openvswitch.agent.ovs_neutron_agent   File "/usr/lib64/python2.7/contextlib.py", line 24, in __exit__
2014-08-05 15:20:57.089 3944 TRACE neutron.plugins.openvswitch.agent.ovs_neutron_agent     self.gen.next()
2014-08-05 15:20:57.089 3944 TRACE neutron.plugins.openvswitch.agent.ovs_neutron_agent   File "/usr/lib/python2.7/site-packages/neutron/agent/firewall.py", line 108, in defer_apply
2014-08-05 15:20:57.089 3944 TRACE neutron.plugins.openvswitch.agent.ovs_neutron_agent     self.filter_defer_apply_off()
2014-08-05 15:20:57.089 3944 TRACE neutron.plugins.openvswitch.agent.ovs_neutron_agent   File "/usr/lib/python2.7/site-packages/neutron/agent/linux/iptables_firewall.py", line 370, in filter_defer_apply_off
2014-08-05 15:20:57.089 3944 TRACE neutron.plugins.openvswitch.agent.ovs_neutron_agent     self.iptables.defer_apply_off()
2014-08-05 15:20:57.089 3944 TRACE neutron.plugins.openvswitch.agent.ovs_neutron_agent   File "/usr/lib/python2.7/site-packages/neutron/agent/linux/iptables_manager.py", line 353, in defer_apply_off
2014-08-05 15:20:57.089 3944 TRACE neutron.plugins.openvswitch.agent.ovs_neutron_agent     self._apply()
2014-08-05 15:20:57.089 3944 TRACE neutron.plugins.openvswitch.agent.ovs_neutron_agent   File "/usr/lib/python2.7/site-packages/neutron/agent/linux/iptables_manager.py", line 369, in _apply
2014-08-05 15:20:57.089 3944 TRACE neutron.plugins.openvswitch.agent.ovs_neutron_agent     return self._apply_synchronized()
2014-08-05 15:20:57.089 3944 TRACE neutron.plugins.openvswitch.agent.ovs_neutron_agent   File "/usr/lib/python2.7/site-packages/neutron/agent/linux/iptables_manager.py", line 400, in _apply_synchronized
2014-08-05 15:20:57.089 3944 TRACE neutron.plugins.openvswitch.agent.ovs_neutron_agent     root_helper=self.root_helper)
2014-08-05 15:20:57.089 3944 TRACE neutron.plugins.openvswitch.agent.ovs_neutron_agent   File "/usr/lib/python2.7/site-packages/neutron/agent/linux/utils.py", line 76, in execute
2014-08-05 15:20:57.089 3944 TRACE neutron.plugins.openvswitch.agent.ovs_neutron_agent     raise RuntimeError(m)
2014-08-05 15:20:57.089 3944 TRACE neutron.plugins.openvswitch.agent.ovs_neutron_agent RuntimeError:
2014-08-05 15:20:57.089 3944 TRACE neutron.plugins.openvswitch.agent.ovs_neutron_agent Command: ['sudo', 'neutron-rootwrap', '/etc/neutron/rootwrap.conf', 'ip6tables-restore', '-c']
2014-08-05 15:20:57.089 3944 TRACE neutron.plugins.openvswitch.agent.ovs_neutron_agent Exit code: 2
2014-08-05 15:20:57.089 3944 TRACE neutron.plugins.openvswitch.agent.ovs_neutron_agent Stdout: ''
2014-08-05 15:20:57.089 3944 TRACE neutron.plugins.openvswitch.agent.ovs_neutron_agent Stderr: "ip6tables-restore v1.4.21: ip6tables-restore: unable to initialize table 'filter'\n\nError occurred at line: 2\nTry `ip6tables-restore -h' or 'ip6tables-restore --help' for more information.\n"
2014-08-05 15:20:57.089 3944 TRACE neutron.plugins.openvswitch.agent.ovs_neutron_agent
2014-08-05 15:20:58.261 3944 INFO neutron.plugins.openvswitch.agent.ovs_neutron_agent [-] Agent out of sync with plugin!
2014-08-05 15:20:58.749 3944 INFO neutron.agent.securitygroups_rpc [-] Preparing filters for devices set([u'5e646c57-0ce4-4705-9281-2cf991cd4135', u'1e0ea538-74a4-429d-97fb-08fbae37ad47'])

** Affects: neutron
     Importance: Undecided
     Assignee: Jakub Libosvar (libosvar)
         Status: New

** Changed in: neutron
     Assignee: (unassigned) => Jakub Libosvar (libosvar)

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https://bugs.launchpad.net/bugs/1352893

Title:
  ipv6 cannot be disabled for ovs agent

Status in OpenStack Neutron (virtual network service):
  New

Bug description:
  If ipv6 module is not loaded in kernel ip6tables command doesn't work
  and fails  in openvswitch-agent when processing ports:

  2014-08-05 15:20:57.089 3944 ERROR neutron.plugins.openvswitch.agent.ovs_neutron_agent [-] Error while processing VIF ports
  2014-08-05 15:20:57.089 3944 TRACE neutron.plugins.openvswitch.agent.ovs_neutron_agent Traceback (most recent call last):
  2014-08-05 15:20:57.089 3944 TRACE neutron.plugins.openvswitch.agent.ovs_neutron_agent   File "/usr/lib/python2.7/site-packages/neutron/plugins/openvswitch/agent/ovs_neutron_agent.py", line 1262, in rpc_loop
  2014-08-05 15:20:57.089 3944 TRACE neutron.plugins.openvswitch.agent.ovs_neutron_agent     ovs_restarted)
  2014-08-05 15:20:57.089 3944 TRACE neutron.plugins.openvswitch.agent.ovs_neutron_agent   File "/usr/lib/python2.7/site-packages/neutron/plugins/openvswitch/agent/ovs_neutron_agent.py", line 1090, in process_network_ports
  2014-08-05 15:20:57.089 3944 TRACE neutron.plugins.openvswitch.agent.ovs_neutron_agent     port_info.get('updated', set()))
  2014-08-05 15:20:57.089 3944 TRACE neutron.plugins.openvswitch.agent.ovs_neutron_agent   File "/usr/lib/python2.7/site-packages/neutron/agent/securitygroups_rpc.py", line 247, in setup_port_filters
  2014-08-05 15:20:57.089 3944 TRACE neutron.plugins.openvswitch.agent.ovs_neutron_agent     self.prepare_devices_filter(new_devices)
  2014-08-05 15:20:57.089 3944 TRACE neutron.plugins.openvswitch.agent.ovs_neutron_agent   File "/usr/lib/python2.7/site-packages/neutron/agent/securitygroups_rpc.py", line 164, in prepare_devices_filter
  2014-08-05 15:20:57.089 3944 TRACE neutron.plugins.openvswitch.agent.ovs_neutron_agent     self.firewall.prepare_port_filter(device)
  2014-08-05 15:20:57.089 3944 TRACE neutron.plugins.openvswitch.agent.ovs_neutron_agent   File "/usr/lib64/python2.7/contextlib.py", line 24, in __exit__
  2014-08-05 15:20:57.089 3944 TRACE neutron.plugins.openvswitch.agent.ovs_neutron_agent     self.gen.next()
  2014-08-05 15:20:57.089 3944 TRACE neutron.plugins.openvswitch.agent.ovs_neutron_agent   File "/usr/lib/python2.7/site-packages/neutron/agent/firewall.py", line 108, in defer_apply
  2014-08-05 15:20:57.089 3944 TRACE neutron.plugins.openvswitch.agent.ovs_neutron_agent     self.filter_defer_apply_off()
  2014-08-05 15:20:57.089 3944 TRACE neutron.plugins.openvswitch.agent.ovs_neutron_agent   File "/usr/lib/python2.7/site-packages/neutron/agent/linux/iptables_firewall.py", line 370, in filter_defer_apply_off
  2014-08-05 15:20:57.089 3944 TRACE neutron.plugins.openvswitch.agent.ovs_neutron_agent     self.iptables.defer_apply_off()
  2014-08-05 15:20:57.089 3944 TRACE neutron.plugins.openvswitch.agent.ovs_neutron_agent   File "/usr/lib/python2.7/site-packages/neutron/agent/linux/iptables_manager.py", line 353, in defer_apply_off
  2014-08-05 15:20:57.089 3944 TRACE neutron.plugins.openvswitch.agent.ovs_neutron_agent     self._apply()
  2014-08-05 15:20:57.089 3944 TRACE neutron.plugins.openvswitch.agent.ovs_neutron_agent   File "/usr/lib/python2.7/site-packages/neutron/agent/linux/iptables_manager.py", line 369, in _apply
  2014-08-05 15:20:57.089 3944 TRACE neutron.plugins.openvswitch.agent.ovs_neutron_agent     return self._apply_synchronized()
  2014-08-05 15:20:57.089 3944 TRACE neutron.plugins.openvswitch.agent.ovs_neutron_agent   File "/usr/lib/python2.7/site-packages/neutron/agent/linux/iptables_manager.py", line 400, in _apply_synchronized
  2014-08-05 15:20:57.089 3944 TRACE neutron.plugins.openvswitch.agent.ovs_neutron_agent     root_helper=self.root_helper)
  2014-08-05 15:20:57.089 3944 TRACE neutron.plugins.openvswitch.agent.ovs_neutron_agent   File "/usr/lib/python2.7/site-packages/neutron/agent/linux/utils.py", line 76, in execute
  2014-08-05 15:20:57.089 3944 TRACE neutron.plugins.openvswitch.agent.ovs_neutron_agent     raise RuntimeError(m)
  2014-08-05 15:20:57.089 3944 TRACE neutron.plugins.openvswitch.agent.ovs_neutron_agent RuntimeError:
  2014-08-05 15:20:57.089 3944 TRACE neutron.plugins.openvswitch.agent.ovs_neutron_agent Command: ['sudo', 'neutron-rootwrap', '/etc/neutron/rootwrap.conf', 'ip6tables-restore', '-c']
  2014-08-05 15:20:57.089 3944 TRACE neutron.plugins.openvswitch.agent.ovs_neutron_agent Exit code: 2
  2014-08-05 15:20:57.089 3944 TRACE neutron.plugins.openvswitch.agent.ovs_neutron_agent Stdout: ''
  2014-08-05 15:20:57.089 3944 TRACE neutron.plugins.openvswitch.agent.ovs_neutron_agent Stderr: "ip6tables-restore v1.4.21: ip6tables-restore: unable to initialize table 'filter'\n\nError occurred at line: 2\nTry `ip6tables-restore -h' or 'ip6tables-restore --help' for more information.\n"
  2014-08-05 15:20:57.089 3944 TRACE neutron.plugins.openvswitch.agent.ovs_neutron_agent
  2014-08-05 15:20:58.261 3944 INFO neutron.plugins.openvswitch.agent.ovs_neutron_agent [-] Agent out of sync with plugin!
  2014-08-05 15:20:58.749 3944 INFO neutron.agent.securitygroups_rpc [-] Preparing filters for devices set([u'5e646c57-0ce4-4705-9281-2cf991cd4135', u'1e0ea538-74a4-429d-97fb-08fbae37ad47'])

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Follow ups

[Bug 1352893] Re: ipv6 cannot be disabled for ovs agent
From: Adam Gandelman, 2014-10-02
[Bug 1352893] Re: ipv6 cannot be disabled for ovs agent
From: Adam Gandelman, 2014-09-29
[Bug 1352893] Re: ipv6 cannot be disabled for ovs agent
From: Thierry Carrez, 2014-09-04
[Bug 1352893] [NEW] ipv6 cannot be disabled for ovs agent
From: Jakub Libosvar, 2014-08-05
References

[Bug 1352893] [NEW] ipv6 cannot be disabled for ovs agent
From: Jakub Libosvar, 2014-08-05