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[Cedric Brandily <1513041@xxxxxxxxxxxxxxxxxx>]

It seems an explanation is required when updating the bug status

** Changed in: neutron
       Status: New => Opinion

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https://bugs.launchpad.net/bugs/1513041

Title:
  need to wait more than 30 seconds before the network namespace can be
  checked on network node  when creating network(with 860
  tenant/network/instance created)

Status in neutron:
  Opinion

Bug description:
  [Summary]
  need to wait more than 30 seconds before the network namespace can be checked on network node  when creating network(with 860 tenant/network/instance 

  created)

  [Topo]
  1 controller, 2 network nodes, 6 compute nodes, all in ubuntu 14.04
  (openstack version is 2015.1.2, linux kernel version is 3.19.0-31)
  root@ah:~# uname -a
  Linux ah.container13 3.19.0-31-generic #36~14.04.1-Ubuntu SMP Thu Oct 8 10:21:08 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
  root@ah:~# 
  root@ah:~# dpkg -l | grep neutron
  ii  neutron-common                      1:2015.1.2-0ubuntu1~cloud0            all          Neutron is a virtual network service for Openstack - common
  ii  neutron-plugin-ml2                  1:2015.1.2-0ubuntu1~cloud0            all          Neutron is a virtual network service for Openstack - ML2 plugin
  ii  neutron-server                      1:2015.1.2-0ubuntu1~cloud0            all          Neutron is a virtual network service for Openstack - server
  ii  python-neutron                      1:2015.1.2-0ubuntu1~cloud0            all          Neutron is a virtual network service for Openstack - Python 

  library
  ii  python-neutron-fwaas                2015.1.2-0ubuntu2~cloud0              all          Firewall-as-a-Service driver for OpenStack Neutron
  ii  python-neutronclient                1:2.3.11-0ubuntu1.2~cloud0            all          client - Neutron is a virtual network service for Openstack
  root@ah:~#

  [Description and expect result]
  the network namespace can be checked on network node immidiately when creating network

  [Reproduceable or not]
  reproducible when large number of tenant/network/instance configed

  [Recreate Steps]
  1)use script to create: 860 tenants, 1 network/router in each tenant, 1 cirros container in each network, all containers are associate to FIP

  2)create one more network, the name space of this network can only be
  checked on network node 30 seconds later >>>>ISSUE

  
  [Configration]
  config files for controller/network/compute are attached

  [logs]
  Post logs here.

  [Root cause anlyze or debug inf]
  high load on controller and network node

  [Attachment]
  log files attached

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