Openstack : net-config fails on virtual function with : "Unable to read numvfs"

Issue

• Deployment of new node fails with os-net-config with the below error, found under os-net-config logs

  [root@computesriov-0 ~]# journalctl -fu os-net-config
  During handling of the above exception, another exception occurred:
  
  Traceback (most recent call last):
  File "/bin/os-net-config", line 10, in <module>
    sys.exit(main())
  File "/usr/lib/python3.6/site-packages/os_net_config/cli.py", line 295, in main
    provider.add_object(obj)
  File "/usr/lib/python3.6/site-packages/os_net_config/__init__.py", line 106, in add_object
    self.add_sriov_pf(obj)
  File "/usr/lib/python3.6/site-packages/os_net_config/impl_ifcfg.py", line 995, in add_sriov_pf
    link_mode=sriov_pf.link_mode)
  File "/usr/lib/python3.6/site-packages/os_net_config/utils.py", line 483, in update_sriov_pf_map
    cur_numvfs = sriov_config.get_numvfs(ifname)
  File "/usr/lib/python3.6/site-packages/os_net_config/sriov_config.py", line 118, in get_numvfs
    raise SRIOVNumvfsException(msg)
  os_net_config.sriov_config.SRIOVNumvfsException: Unable to read numvfs for eno1