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[Bug 1623958] [NEW] Metering-agent fails to restore iptables

To: yahoo-eng-team@xxxxxxxxxxxxxxxxxxx
From: Kengo Hobo <hobo.kengo@xxxxxxxxxxxxxx>
Date: Thu, 15 Sep 2016 13:57:26 -0000
Reply-to: Bug 1623958 <1623958@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx
Public bug reported:

iptables-restore fails with 'Bad argument' when we call 'add_rule' with '' as rule,
because IptableManager try to add line below which is invalid format.
===
-I neutron-meter-l-ba70a353-f3a 1 neutron-meter-l-ba70a353-f3a
===

This behavior is occurred after the modification.
https://github.com/openstack/neutron/commit/5b7c71a327d735134fa0eeb4427d0e1bd1f7d1e5

Created blank by rule is stripped during initializing IptablesRule.
https://github.com/openstack/neutron/blob/master/neutron/agent/linux/iptables_manager.py#L124

This stripping blank changes result in _generate_chain_diff_iptables_commands as follows.
https://github.com/openstack/neutron/blob/master/neutron/agent/linux/iptables_manager.py#L767

before:  '' is set in rule variable.
after: chain name(e.g.neutron-meter-l-e648a667-c21) is set as rule variable. 

Additional string is added and invalid format is generated.
Thus, iptable-restore fails.

trace in metering-agent.log
==============================
2016-09-15 12:50:39.202 22676 ERROR neutron.agent.linux.utils [req-b3191be2-6daf-42bf-bc3a-e792481da48b da7194b4e98b4c8badc5912bbcd7aea4 9384ef06bc9d4af08a384692c92761c
e - - -] Exit code: 2; Stdin: # Generated by iptables_manager
*filter
:neutron-meter-FORWARD - [0:0]
:neutron-meter-INPUT - [0:0]
:neutron-meter-OUTPUT - [0:0]
:neutron-meter-l-ba70a353-f3a - [0:0]
:neutron-meter-local - [0:0]
:neutron-meter-r-ba70a353-f3a - [0:0]
-I FORWARD 2 -j neutron-meter-FORWARD
-I INPUT 1 -j neutron-meter-INPUT
-I OUTPUT 2 -j neutron-meter-OUTPUT
-I neutron-filter-top 1 -j neutron-meter-local
-I neutron-meter-FORWARD 1 -j neutron-meter-r-ba70a353-f3a
-I neutron-meter-l-ba70a353-f3a 1 neutron-meter-l-ba70a353-f3a
COMMIT
# Completed by iptables_manager
# Generated by iptables_manager
*raw
:neutron-meter-OUTPUT - [0:0]
:neutron-meter-PREROUTING - [0:0]
-I OUTPUT 1 -j neutron-meter-OUTPUT
-I PREROUTING 1 -j neutron-meter-PREROUTING
COMMIT
# Completed by iptables_manager
; Stdout: ; Stderr: Bad argument `neutron-meter-l-ba70a353-f3a'
Error occurred at line: 14
Try `iptables-restore -h' or 'iptables-restore --help' for more information.

2016-09-15 12:50:39.204 22676 ERROR neutron.agent.linux.iptables_manager [req-b3191be2-6daf-42bf-bc3a-e792481da48b da7194b4e98b4c8badc5912bbcd7aea4 9384ef06bc9d4af08a384692c92761ce - - -] IPTablesManager.apply failed to apply the following set of iptables rules:
      1. # Generated by iptables_manager
      2. *filter
      3. :neutron-meter-FORWARD - [0:0]
      4. :neutron-meter-INPUT - [0:0]
      5. :neutron-meter-OUTPUT - [0:0]
      6. :neutron-meter-l-ba70a353-f3a - [0:0]
      7. :neutron-meter-local - [0:0]
      8. :neutron-meter-r-ba70a353-f3a - [0:0]
      9. -I FORWARD 2 -j neutron-meter-FORWARD
     10. -I INPUT 1 -j neutron-meter-INPUT
     11. -I OUTPUT 2 -j neutron-meter-OUTPUT
     12. -I neutron-filter-top 1 -j neutron-meter-local
     13. -I neutron-meter-FORWARD 1 -j neutron-meter-r-ba70a353-f3a
     14. -I neutron-meter-l-ba70a353-f3a 1 neutron-meter-l-ba70a353-f3a
     15. COMMIT
     16. # Completed by iptables_manager
     17. # Generated by iptables_manager
     18. *raw
     19. :neutron-meter-OUTPUT - [0:0]
     20. :neutron-meter-PREROUTING - [0:0]
     21. -I OUTPUT 1 -j neutron-meter-OUTPUT
     22. -I PREROUTING 1 -j neutron-meter-PREROUTING
     23. COMMIT
     24. # Completed by iptables_manager
     25.
2016-09-15 12:50:39.204 22676 DEBUG oslo_concurrency.lockutils [req-b3191be2-6daf-42bf-bc3a-e792481da48b da7194b4e98b4c8badc5912bbcd7aea4 9384ef06bc9d4af08a384692c92761ce - - -] Releasing semaphore "iptables-qrouter-98b59b73-4490-4834-a02c-ae2e1ea16d64" lock /usr/local/lib/python2.7/dist-packages/oslo_concurrency/lockutils.py:225
2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent [req-b3191be2-6daf-42bf-bc3a-e792481da48b da7194b4e98b4c8badc5912bbcd7aea4 9384ef06bc9d4af08a384692c92761ce - - -] Driver neutron.services.metering.drivers.iptables.iptables_driver.IptablesMeteringDriver:add_metering_label runtime error
2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent Traceback (most recent call last):
2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent   File "/opt/stack/neutron/neutron/services/metering/agents/metering_agent.py", line 166, in _invoke_driver
2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent     return getattr(self.metering_driver, func_name)(context, meterings)
2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent   File "/usr/local/lib/python2.7/dist-packages/oslo_log/helpers.py", line 48, in wrapper
2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent     return method(*args, **kwargs)
2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent   File "/opt/stack/neutron/neutron/services/metering/drivers/iptables/iptables_driver.py", line 262, in add_metering_label
2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent     self._process_associate_metering_label(router)
2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent   File "/opt/stack/neutron/neutron/services/metering/drivers/iptables/iptables_driver.py", line 231, in _process_associate_metering_label
2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent     rm.metering_labels[label_id] = label
2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent   File "/opt/stack/neutron/neutron/services/metering/drivers/iptables/iptables_driver.py", line 58, in __exit__
2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent     self.im.apply()
2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent   File "/opt/stack/neutron/neutron/agent/linux/iptables_manager.py", line 438, in apply
2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent     return self._apply()
2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent   File "/opt/stack/neutron/neutron/agent/linux/iptables_manager.py", line 446, in _apply
2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent     first = self._apply_synchronized()
2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent   File "/opt/stack/neutron/neutron/agent/linux/iptables_manager.py", line 532, in _apply_synchronized
2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent     '\n'.join(log_lines))
2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent   File "/usr/local/lib/python2.7/dist-packages/oslo_utils/excutils.py", line 220, in __exit__
2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent     self.force_reraise()
2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent   File "/usr/local/lib/python2.7/dist-packages/oslo_utils/excutils.py", line 196, in force_reraise
2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent     six.reraise(self.type_, self.value, self.tb)
2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent   File "/opt/stack/neutron/neutron/agent/linux/iptables_manager.py", line 511, in _apply_synchronized
2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent     run_as_root=True)
2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent   File "/opt/stack/neutron/neutron/agent/linux/utils.py", line 138, in execute
2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent     raise RuntimeError(msg)
2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent RuntimeError: Exit code: 2; Stdin: # Generated by iptables_manager
2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent *filter
2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent :neutron-meter-FORWARD - [0:0]
2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent :neutron-meter-INPUT - [0:0]
2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent :neutron-meter-OUTPUT - [0:0]
2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent :neutron-meter-l-ba70a353-f3a - [0:0]
2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent :neutron-meter-local - [0:0]
2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent :neutron-meter-r-ba70a353-f3a - [0:0]
2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent -I FORWARD 2 -j neutron-meter-FORWARD
2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent -I INPUT 1 -j neutron-meter-INPUT
2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent -I OUTPUT 2 -j neutron-meter-OUTPUT
2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent -I neutron-filter-top 1 -j neutron-meter-local
2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent -I neutron-meter-FORWARD 1 -j neutron-meter-r-ba70a353-f3a
2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent -I neutron-meter-l-ba70a353-f3a 1 neutron-meter-l-ba70a353-f3a
2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent COMMIT
2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent # Completed by iptables_manager
2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent # Generated by iptables_manager
2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent *raw
2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent :neutron-meter-OUTPUT - [0:0]
2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent :neutron-meter-PREROUTING - [0:0]
2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent -I OUTPUT 1 -j neutron-meter-OUTPUT
2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent -I PREROUTING 1 -j neutron-meter-PREROUTING
2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent COMMIT
2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent # Completed by iptables_manager
2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent ; Stdout: ; Stderr: Bad argument `neutron-meter-l-ba70a353-f3a'
2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent Error occurred at line: 14
2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent Try `iptables-restore -h' or 'iptables-restore --help' for more information.
2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent
2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent
=================================

** Affects: neutron
     Importance: Undecided
     Assignee: Kengo Hobo (hobo-kengo)
         Status: New


** Tags: metering

** Changed in: neutron
     Assignee: (unassigned) => Kengo Hobo (hobo-kengo)

** Tags added: metering

-- 
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Engineering Team, which is subscribed to neutron.
https://bugs.launchpad.net/bugs/1623958

Title:
  Metering-agent fails to restore iptables

Status in neutron:
  New

Bug description:
  iptables-restore fails with 'Bad argument' when we call 'add_rule' with '' as rule,
  because IptableManager try to add line below which is invalid format.
  ===
  -I neutron-meter-l-ba70a353-f3a 1 neutron-meter-l-ba70a353-f3a
  ===

  This behavior is occurred after the modification.
  https://github.com/openstack/neutron/commit/5b7c71a327d735134fa0eeb4427d0e1bd1f7d1e5

  Created blank by rule is stripped during initializing IptablesRule.
  https://github.com/openstack/neutron/blob/master/neutron/agent/linux/iptables_manager.py#L124

  This stripping blank changes result in _generate_chain_diff_iptables_commands as follows.
  https://github.com/openstack/neutron/blob/master/neutron/agent/linux/iptables_manager.py#L767

  before:  '' is set in rule variable.
  after: chain name(e.g.neutron-meter-l-e648a667-c21) is set as rule variable. 

  Additional string is added and invalid format is generated.
  Thus, iptable-restore fails.

  trace in metering-agent.log
  ==============================
  2016-09-15 12:50:39.202 22676 ERROR neutron.agent.linux.utils [req-b3191be2-6daf-42bf-bc3a-e792481da48b da7194b4e98b4c8badc5912bbcd7aea4 9384ef06bc9d4af08a384692c92761c
  e - - -] Exit code: 2; Stdin: # Generated by iptables_manager
  *filter
  :neutron-meter-FORWARD - [0:0]
  :neutron-meter-INPUT - [0:0]
  :neutron-meter-OUTPUT - [0:0]
  :neutron-meter-l-ba70a353-f3a - [0:0]
  :neutron-meter-local - [0:0]
  :neutron-meter-r-ba70a353-f3a - [0:0]
  -I FORWARD 2 -j neutron-meter-FORWARD
  -I INPUT 1 -j neutron-meter-INPUT
  -I OUTPUT 2 -j neutron-meter-OUTPUT
  -I neutron-filter-top 1 -j neutron-meter-local
  -I neutron-meter-FORWARD 1 -j neutron-meter-r-ba70a353-f3a
  -I neutron-meter-l-ba70a353-f3a 1 neutron-meter-l-ba70a353-f3a
  COMMIT
  # Completed by iptables_manager
  # Generated by iptables_manager
  *raw
  :neutron-meter-OUTPUT - [0:0]
  :neutron-meter-PREROUTING - [0:0]
  -I OUTPUT 1 -j neutron-meter-OUTPUT
  -I PREROUTING 1 -j neutron-meter-PREROUTING
  COMMIT
  # Completed by iptables_manager
  ; Stdout: ; Stderr: Bad argument `neutron-meter-l-ba70a353-f3a'
  Error occurred at line: 14
  Try `iptables-restore -h' or 'iptables-restore --help' for more information.

  2016-09-15 12:50:39.204 22676 ERROR neutron.agent.linux.iptables_manager [req-b3191be2-6daf-42bf-bc3a-e792481da48b da7194b4e98b4c8badc5912bbcd7aea4 9384ef06bc9d4af08a384692c92761ce - - -] IPTablesManager.apply failed to apply the following set of iptables rules:
        1. # Generated by iptables_manager
        2. *filter
        3. :neutron-meter-FORWARD - [0:0]
        4. :neutron-meter-INPUT - [0:0]
        5. :neutron-meter-OUTPUT - [0:0]
        6. :neutron-meter-l-ba70a353-f3a - [0:0]
        7. :neutron-meter-local - [0:0]
        8. :neutron-meter-r-ba70a353-f3a - [0:0]
        9. -I FORWARD 2 -j neutron-meter-FORWARD
       10. -I INPUT 1 -j neutron-meter-INPUT
       11. -I OUTPUT 2 -j neutron-meter-OUTPUT
       12. -I neutron-filter-top 1 -j neutron-meter-local
       13. -I neutron-meter-FORWARD 1 -j neutron-meter-r-ba70a353-f3a
       14. -I neutron-meter-l-ba70a353-f3a 1 neutron-meter-l-ba70a353-f3a
       15. COMMIT
       16. # Completed by iptables_manager
       17. # Generated by iptables_manager
       18. *raw
       19. :neutron-meter-OUTPUT - [0:0]
       20. :neutron-meter-PREROUTING - [0:0]
       21. -I OUTPUT 1 -j neutron-meter-OUTPUT
       22. -I PREROUTING 1 -j neutron-meter-PREROUTING
       23. COMMIT
       24. # Completed by iptables_manager
       25.
  2016-09-15 12:50:39.204 22676 DEBUG oslo_concurrency.lockutils [req-b3191be2-6daf-42bf-bc3a-e792481da48b da7194b4e98b4c8badc5912bbcd7aea4 9384ef06bc9d4af08a384692c92761ce - - -] Releasing semaphore "iptables-qrouter-98b59b73-4490-4834-a02c-ae2e1ea16d64" lock /usr/local/lib/python2.7/dist-packages/oslo_concurrency/lockutils.py:225
  2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent [req-b3191be2-6daf-42bf-bc3a-e792481da48b da7194b4e98b4c8badc5912bbcd7aea4 9384ef06bc9d4af08a384692c92761ce - - -] Driver neutron.services.metering.drivers.iptables.iptables_driver.IptablesMeteringDriver:add_metering_label runtime error
  2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent Traceback (most recent call last):
  2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent   File "/opt/stack/neutron/neutron/services/metering/agents/metering_agent.py", line 166, in _invoke_driver
  2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent     return getattr(self.metering_driver, func_name)(context, meterings)
  2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent   File "/usr/local/lib/python2.7/dist-packages/oslo_log/helpers.py", line 48, in wrapper
  2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent     return method(*args, **kwargs)
  2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent   File "/opt/stack/neutron/neutron/services/metering/drivers/iptables/iptables_driver.py", line 262, in add_metering_label
  2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent     self._process_associate_metering_label(router)
  2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent   File "/opt/stack/neutron/neutron/services/metering/drivers/iptables/iptables_driver.py", line 231, in _process_associate_metering_label
  2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent     rm.metering_labels[label_id] = label
  2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent   File "/opt/stack/neutron/neutron/services/metering/drivers/iptables/iptables_driver.py", line 58, in __exit__
  2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent     self.im.apply()
  2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent   File "/opt/stack/neutron/neutron/agent/linux/iptables_manager.py", line 438, in apply
  2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent     return self._apply()
  2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent   File "/opt/stack/neutron/neutron/agent/linux/iptables_manager.py", line 446, in _apply
  2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent     first = self._apply_synchronized()
  2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent   File "/opt/stack/neutron/neutron/agent/linux/iptables_manager.py", line 532, in _apply_synchronized
  2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent     '\n'.join(log_lines))
  2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent   File "/usr/local/lib/python2.7/dist-packages/oslo_utils/excutils.py", line 220, in __exit__
  2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent     self.force_reraise()
  2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent   File "/usr/local/lib/python2.7/dist-packages/oslo_utils/excutils.py", line 196, in force_reraise
  2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent     six.reraise(self.type_, self.value, self.tb)
  2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent   File "/opt/stack/neutron/neutron/agent/linux/iptables_manager.py", line 511, in _apply_synchronized
  2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent     run_as_root=True)
  2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent   File "/opt/stack/neutron/neutron/agent/linux/utils.py", line 138, in execute
  2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent     raise RuntimeError(msg)
  2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent RuntimeError: Exit code: 2; Stdin: # Generated by iptables_manager
  2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent *filter
  2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent :neutron-meter-FORWARD - [0:0]
  2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent :neutron-meter-INPUT - [0:0]
  2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent :neutron-meter-OUTPUT - [0:0]
  2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent :neutron-meter-l-ba70a353-f3a - [0:0]
  2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent :neutron-meter-local - [0:0]
  2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent :neutron-meter-r-ba70a353-f3a - [0:0]
  2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent -I FORWARD 2 -j neutron-meter-FORWARD
  2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent -I INPUT 1 -j neutron-meter-INPUT
  2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent -I OUTPUT 2 -j neutron-meter-OUTPUT
  2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent -I neutron-filter-top 1 -j neutron-meter-local
  2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent -I neutron-meter-FORWARD 1 -j neutron-meter-r-ba70a353-f3a
  2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent -I neutron-meter-l-ba70a353-f3a 1 neutron-meter-l-ba70a353-f3a
  2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent COMMIT
  2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent # Completed by iptables_manager
  2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent # Generated by iptables_manager
  2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent *raw
  2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent :neutron-meter-OUTPUT - [0:0]
  2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent :neutron-meter-PREROUTING - [0:0]
  2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent -I OUTPUT 1 -j neutron-meter-OUTPUT
  2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent -I PREROUTING 1 -j neutron-meter-PREROUTING
  2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent COMMIT
  2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent # Completed by iptables_manager
  2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent ; Stdout: ; Stderr: Bad argument `neutron-meter-l-ba70a353-f3a'
  2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent Error occurred at line: 14
  2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent Try `iptables-restore -h' or 'iptables-restore --help' for more information.
  2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent
  2016-09-15 12:50:39.205 22676 ERROR neutron.services.metering.agents.metering_agent
  =================================

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Follow ups

[Bug 1623958] Re: Metering-agent fails to restore iptables with 'Bad argument'
From: OpenStack Infra, 2016-09-16