This bug should not have been closed for neutron. The performance
argument is weak because this code is only called during interface
creation. The trade-off for a tiny bit of performance in infrequent code
for neutron completely breaking in some environments is unacceptable
IMO. This already wasted an afternoon on my part any I'm relatively
familiar with the neutron code. This would be nearly impossible to debug
for a deployer.
** Changed in: neutron
Status: Invalid => Confirmed
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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 Fuel for OpenStack 4.1.x series:
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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