Comment 0 for bug 1692832

Description:
While creating ingress corresponding netns instance is not getting created in agent container. The following traceback is observed. required permission is missing.

Traceback
------------
From: http://10.87.121.36:8085/Snh_ServiceInstanceReq?uuid=

Traceback (most recent call last):
  File "/usr/bin/opencontrail-vrouter-netns", line 9, in <module>
    load_entry_point('opencontrail-vrouter-netns==0.1', 'console_scripts', 'opencontrail-vrouter-netns')()
  File "/usr/lib/python2.7/dist-packages/opencontrail_vrouter_netns/vrouter_netns.py", line 500, in main
    vrouter_netns.args.func()
  File "/usr/lib/python2.7/dist-packages/opencontrail_vrouter_netns/vrouter_netns.py", line 453, in create
    if (netns_mgr.set_lbaas() == False):
  File "/usr/lib/python2.7/dist-packages/opencontrail_vrouter_netns/vrouter_netns.py", line 160, in set_lbaas
    self.create()
  File "/usr/lib/python2.7/dist-packages/opencontrail_vrouter_netns/vrouter_netns.py", line 103, in create
    ip.ensure_namespace(self.namespace)
  File "/usr/lib/python2.7/dist-packages/opencontrail_vrouter_netns/linux/ip_lib.py", line 137, in ensure_namespace
    ip = self.netns.add(name)
  File "/usr/lib/python2.7/dist-packages/opencontrail_vrouter_netns/linux/ip_lib.py", line 489, in add
    self._as_root('add', name, use_root_namespace=True)
  File "/usr/lib/python2.7/dist-packages/opencontrail_vrouter_netns/linux/ip_lib.py", line 220, in _as_root
    kwargs.get('use_root_namespace', False))
  File "/usr/lib/python2.7/dist-packages/opencontrail_vrouter_netns/linux/ip_lib.py", line 69, in _as_root
    namespace)
  File "/usr/lib/python2.7/dist-packages/opencontrail_vrouter_netns/linux/ip_lib.py", line 80, in _execute
    root_helper=root_helper)
  File "/usr/lib/python2.7/dist-packages/opencontrail_vrouter_netns/linux/utils.py", line 86, in execute
    raise RuntimeError(m)
RuntimeError:
Command: ['sudo', 'ip', 'netns', 'add', 'vrouter-253b4c2e-c8ef-4f14-9ed7-d774c68b599c:cbe173ca-3f8b-11e7-9cd7-0cc47aa89e64']
Exit code: 1
Stdout: ''
Stderr: 'mkdir /var/run/netns failed: Read-only file system\n'