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[Kevin Benton <1348812@xxxxxxxxxxxxxxxxxx>]

*** This bug is a duplicate of bug 1311804 ***
    https://bugs.launchpad.net/bugs/1311804

** This bug has been marked a duplicate of bug 1311804
   ip netns list starts without root_helper

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https://bugs.launchpad.net/bugs/1348812

Title:
  l3 agent not using root_helper to check namespace

Status in OpenStack Neutron (virtual network service):
  In Progress

Bug description:
  The L3 agent is not using the root helper when checking to see that a
  namespace already exists. This causes it get no listed namespaces if
  using an unprivileged account and try to create a duplicate namespace,
  which then fails because it already exists and raises a runtime error
  like the one below.

  
  Traceback (most recent call last):
    File "/usr/lib/python2.7/dist-packages/eventlet/greenpool.py", line 80, in _spawn_n_impl
      func(*args, **kwargs)
    File "/usr/lib/python2.7/dist-packages/neutron/agent/l3_agent.py", line 434, in process_router
      p['ip_cidr'], p['mac_address'])
    File "/usr/lib/python2.7/dist-packages/neutron/agent/l3_agent.py", line 710, in internal_network_added
      prefix=INTERNAL_DEV_PREFIX)
    File "/usr/lib/python2.7/dist-packages/neutron/agent/linux/interface.py", line 195, in plug
      namespace_obj = ip.ensure_namespace(namespace)
    File "/usr/lib/python2.7/dist-packages/neutron/agent/linux/ip_lib.py", line 137, in ensure_namespace
      ip = self.netns.add(name)
    File "/usr/lib/python2.7/dist-packages/neutron/agent/linux/ip_lib.py", line 447, in add
      self._as_root('add', name, use_root_namespace=True)
    File "/usr/lib/python2.7/dist-packages/neutron/agent/linux/ip_lib.py", line 218, in _as_root
      kwargs.get('use_root_namespace', False))
    File "/usr/lib/python2.7/dist-packages/neutron/agent/linux/ip_lib.py", line 71, in _as_root
      namespace)
    File "/usr/lib/python2.7/dist-packages/neutron/agent/linux/ip_lib.py", line 82, in _execute
      root_helper=root_helper)
    File "/usr/lib/python2.7/dist-packages/neutron/agent/linux/utils.py", line 76, in execute
      raise RuntimeError(m)
  RuntimeError:
  Command: ['sudo', 'neutron-rootwrap', '/etc/neutron/rootwrap.conf', 'ip', 'netns', 'add', 'qrouter-d24d57d0-2155-4011-80d4-f4dbd382c897']
  Exit code: 1
  Stdout: ''
  Stderr: 'Could not create /var/run/netns/qrouter-d24d57d0-2155-4011-80d4-f4dbd382c897: File exists\n'

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