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[Dmitry Pyzhov <dpyzhov+launchpad@xxxxxxxxxxxx>]

** No longer affects: fuel/4.1.x

** Changed in: fuel
    Milestone: None => 4.1.1

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https://bugs.launchpad.net/bugs/1311804

Title:
  ip netns list starts without root_helper

Status in Fuel: OpenStack installer that works:
  Invalid
Status in OpenStack Neutron (virtual network service):
  In Progress

Bug description:
  CENTOS 6.5
  Reproduced on typical Openstack installation in any segmentation type with one L3-agent.

  In ip_lib in IpNetnsComand losted root_helper.
  Without it L3 agent can't create interfaces inside network namespace, because in Centos 'ip netns list' returns empty list if start without root privileges.

  [root@node-2 ~]# uname -a
  Linux node-2.domain.tld 2.6.32-431.11.2.el6.x86_64 #1 SMP Tue Mar 25 19:59:55 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
  [root@node-2 ~]# ip netns list
  haproxy
  qrouter-b582586e-70e3-4a38-8b19-039f30ce87a9
  [root@node-2 ~]# su -m neutron -c 'ip netns list'
  [root@node-2 ~]#

  in the log below exception happens because namespace already exists
  (see full log in attach), but can't detected by ip netns list without
  root_wrapper.

  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

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