Comment 0 for bug 1311804

In ip_lib in IpNetnsComand losted root_helper.
Without it L3 agent can't create interfaces inside network namespace:

2014-04-23 16:15:44.760 28240 DEBUG neutron.agent.linux.utils [req-d0f812f6-d987-45f5-9cff-11f1fa52fed6 None] Running command: ['ip', '-o', 'netns', 'list'] create_process /
usr/lib/python2.6/site-packages/neutron/agent/linux/utils.py:48
2014-04-23 16:15:44.781 28240 DEBUG neutron.agent.linux.utils [req-d0f812f6-d987-45f5-9cff-11f1fa52fed6 None]
Command: ['ip', '-o', 'netns', 'list']
Exit code: 0
Stdout: ''
Stderr: '' execute /usr/lib/python2.6/site-packages/neutron/agent/linux/utils.py:74
2014-04-23 16:15:44.782 28240 DEBUG neutron.agent.linux.utils [req-d0f812f6-d987-45f5-9cff-11f1fa52fed6 None] Running command: ['sudo', 'neutron-rootwrap', '/etc/neutron/roo
twrap.conf', 'ip', 'netns', 'add', 'qrouter-b582586e-70e3-4a38-8b19-039f30ce87a9'] create_process /usr/lib/python2.6/site-packages/neutron/agent/linux/utils.py:48
2014-04-23 16:15:44.864 28240 DEBUG neutron.agent.linux.utils [req-d0f812f6-d987-45f5-9cff-11f1fa52fed6 None]
Command: ['sudo', 'neutron-rootwrap', '/etc/neutron/rootwrap.conf', 'ip', 'netns', 'add', 'qrouter-b582586e-70e3-4a38-8b19-039f30ce87a9']
Exit code: 255
Stdout: ''
Stderr: 'Could not create /var/run/netns/qrouter-b582586e-70e3-4a38-8b19-039f30ce87a9: File exists\n' execute /usr/lib/python2.6/site-packages/neutron/agent/linux/utils.py:7
4
Traceback (most recent call last):
  File "/usr/lib/python2.6/site-packages/eventlet/greenpool.py", line 80, in _spawn_n_impl
    func(*args, **kwargs)
  File "/usr/lib/python2.6/site-packages/neutron/agent/l3_agent.py", line 438, in process_router
    p['ip_cidr'], p['mac_address'])
  File "/usr/lib/python2.6/site-packages/neutron/agent/l3_agent.py", line 707, in internal_network_added
    prefix=INTERNAL_DEV_PREFIX)
  File "/usr/lib/python2.6/site-packages/neutron/agent/linux/interface.py", line 195, in plug
    namespace_obj = ip.ensure_namespace(namespace)
  File "/usr/lib/python2.6/site-packages/neutron/agent/linux/ip_lib.py", line 136, in ensure_namespace
    ip = self.netns.add(name)
  File "/usr/lib/python2.6/site-packages/neutron/agent/linux/ip_lib.py", line 446, in add
    self._as_root('add', name, use_root_namespace=True)
  File "/usr/lib/python2.6/site-packages/neutron/agent/linux/ip_lib.py", line 217, in _as_root
    kwargs.get('use_root_namespace', False))
  File "/usr/lib/python2.6/site-packages/neutron/agent/linux/ip_lib.py", line 70, in _as_root
    namespace)
  File "/usr/lib/python2.6/site-packages/neutron/agent/linux/ip_lib.py", line 81, in _execute
    root_helper=root_helper)
  File "/usr/lib/python2.6/site-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-b582586e-70e3-4a38-8b19-039f30ce87a9']
Exit code: 255