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[Bug 1342142] [NEW] Netron metering agent don't work with more than one network node

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Public bug reported:

Hi Guys,
With more than one L3 agent node neutron metering agent services returns this error:

2014-07-15 12:20:56.005 12584 ERROR neutron.services.metering.agents.metering_agent [req-121072ee-794b-4272-b8a9-b1a7ada7efe0 None] Driver neutron.services.metering.drivers.iptables.iptables_driver.IptablesMeteringDriver:get_traffic_counters runtime error
2014-07-15 12:20:56.005 12584 TRACE neutron.services.metering.agents.metering_agent Traceback (most recent call last):
2014-07-15 12:20:56.005 12584 TRACE neutron.services.metering.agents.metering_agent   File "/usr/lib/python2.7/dist-packages/neutron/services/metering/agents/metering_agent.py", line 177, in _invoke_driver
2014-07-15 12:20:56.005 12584 TRACE neutron.services.metering.agents.metering_agent     return getattr(self.metering_driver, func_name)(context, meterings)
2014-07-15 12:20:56.005 12584 TRACE neutron.services.metering.agents.metering_agent   File "/usr/lib/python2.7/dist-packages/neutron/common/log.py", line 34, in wrapper
2014-07-15 12:20:56.005 12584 TRACE neutron.services.metering.agents.metering_agent     return method(*args, **kwargs)
2014-07-15 12:20:56.005 12584 TRACE neutron.services.metering.agents.metering_agent   File "/usr/lib/python2.7/dist-packages/neutron/services/metering/drivers/iptables/iptables_driver.py", line 272, in get_traffic_counters
2014-07-15 12:20:56.005 12584 TRACE neutron.services.metering.agents.metering_agent     chain, wrap=False, zero=True)
2014-07-15 12:20:56.005 12584 TRACE neutron.services.metering.agents.metering_agent   File "/usr/lib/python2.7/dist-packages/neutron/agent/linux/iptables_manager.py", line 627, in get_traffic_counters
2014-07-15 12:20:56.005 12584 TRACE neutron.services.metering.agents.metering_agent     root_helper=self.root_helper))
2014-07-15 12:20:56.005 12584 TRACE neutron.services.metering.agents.metering_agent   File "/usr/lib/python2.7/dist-packages/neutron/agent/linux/utils.py", line 76, in execute
2014-07-15 12:20:56.005 12584 TRACE neutron.services.metering.agents.metering_agent     raise RuntimeError(m)
2014-07-15 12:20:56.005 12584 TRACE neutron.services.metering.agents.metering_agent RuntimeError:
2014-07-15 12:20:56.005 12584 TRACE neutron.services.metering.agents.metering_agent Command: ['sudo', '/usr/bin/neutron-rootwrap', '/etc/neutron/rootwrap.conf', 'ip', 'netns', 'exec', 'qrouter-c1b46e53-08ac-458f-bc80-3d05ac3d97a3', 'iptables', '-t', 'filter', '-L', 'neutron-meter-l-9263ed54-f97', '-n', '-v', '-x', '-Z']
2014-07-15 12:20:56.005 12584 TRACE neutron.services.metering.agents.metering_agent Exit code: 1
2014-07-15 12:20:56.005 12584 TRACE neutron.services.metering.agents.metering_agent Stdout: ''
2014-07-15 12:20:56.005 12584 TRACE neutron.services.metering.agents.metering_agent Stderr: 'Cannot open network namespace: No such file or directory\n'
2014-07-15 12:20:56.005 12584 TRACE neutron.services.metering.agents.metering_agent


This happens because each network nodes expect to have all network namespace, but it isn't because the router namespaces are divided across multiple nodes.

Do you have any idea to fix this bug?

Daniel

** Affects: neutron
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1342142

Title:
  Netron metering agent don't work with more than one network node

Status in OpenStack Neutron (virtual network service):
  New

Bug description:
  Hi Guys,
  With more than one L3 agent node neutron metering agent services returns this error:

  2014-07-15 12:20:56.005 12584 ERROR neutron.services.metering.agents.metering_agent [req-121072ee-794b-4272-b8a9-b1a7ada7efe0 None] Driver neutron.services.metering.drivers.iptables.iptables_driver.IptablesMeteringDriver:get_traffic_counters runtime error
  2014-07-15 12:20:56.005 12584 TRACE neutron.services.metering.agents.metering_agent Traceback (most recent call last):
  2014-07-15 12:20:56.005 12584 TRACE neutron.services.metering.agents.metering_agent   File "/usr/lib/python2.7/dist-packages/neutron/services/metering/agents/metering_agent.py", line 177, in _invoke_driver
  2014-07-15 12:20:56.005 12584 TRACE neutron.services.metering.agents.metering_agent     return getattr(self.metering_driver, func_name)(context, meterings)
  2014-07-15 12:20:56.005 12584 TRACE neutron.services.metering.agents.metering_agent   File "/usr/lib/python2.7/dist-packages/neutron/common/log.py", line 34, in wrapper
  2014-07-15 12:20:56.005 12584 TRACE neutron.services.metering.agents.metering_agent     return method(*args, **kwargs)
  2014-07-15 12:20:56.005 12584 TRACE neutron.services.metering.agents.metering_agent   File "/usr/lib/python2.7/dist-packages/neutron/services/metering/drivers/iptables/iptables_driver.py", line 272, in get_traffic_counters
  2014-07-15 12:20:56.005 12584 TRACE neutron.services.metering.agents.metering_agent     chain, wrap=False, zero=True)
  2014-07-15 12:20:56.005 12584 TRACE neutron.services.metering.agents.metering_agent   File "/usr/lib/python2.7/dist-packages/neutron/agent/linux/iptables_manager.py", line 627, in get_traffic_counters
  2014-07-15 12:20:56.005 12584 TRACE neutron.services.metering.agents.metering_agent     root_helper=self.root_helper))
  2014-07-15 12:20:56.005 12584 TRACE neutron.services.metering.agents.metering_agent   File "/usr/lib/python2.7/dist-packages/neutron/agent/linux/utils.py", line 76, in execute
  2014-07-15 12:20:56.005 12584 TRACE neutron.services.metering.agents.metering_agent     raise RuntimeError(m)
  2014-07-15 12:20:56.005 12584 TRACE neutron.services.metering.agents.metering_agent RuntimeError:
  2014-07-15 12:20:56.005 12584 TRACE neutron.services.metering.agents.metering_agent Command: ['sudo', '/usr/bin/neutron-rootwrap', '/etc/neutron/rootwrap.conf', 'ip', 'netns', 'exec', 'qrouter-c1b46e53-08ac-458f-bc80-3d05ac3d97a3', 'iptables', '-t', 'filter', '-L', 'neutron-meter-l-9263ed54-f97', '-n', '-v', '-x', '-Z']
  2014-07-15 12:20:56.005 12584 TRACE neutron.services.metering.agents.metering_agent Exit code: 1
  2014-07-15 12:20:56.005 12584 TRACE neutron.services.metering.agents.metering_agent Stdout: ''
  2014-07-15 12:20:56.005 12584 TRACE neutron.services.metering.agents.metering_agent Stderr: 'Cannot open network namespace: No such file or directory\n'
  2014-07-15 12:20:56.005 12584 TRACE neutron.services.metering.agents.metering_agent

  
  This happens because each network nodes expect to have all network namespace, but it isn't because the router namespaces are divided across multiple nodes.

  Do you have any idea to fix this bug?

  Daniel

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