Comment 48 for bug 1489111

Looks my problem can be workarounded by https://ask.openstack.org/en/question/57342/spawning-new-instances-fails-to-allocate-the-network/. After updating vif_plugging_timeout=0 and vif_plugging_is_fatal=False, the VM could be created with steps (loop to update port) and able to ping and I observed that there is nothing related to that corresponding VM in compute node iptables. I also observed some error during vm's rebooting which looks separate problem.

ci-info: +-------+--------------+--------------+---------------+-----------+-------+
2015-11-27 06:34:02,362 - url_helper.py[WARNING]: Calling 'http://169.254.169.254/2009-04-04/meta-data/instance-id' failed [3/15s]: request error [[Errno 113] No route to host]
2015-11-27 06:34:05,363 - url_helper.py[WARNING]: Calling 'http://169.254.169.254/2009-04-04/meta-data/instance-id' failed [6/15s]: request error [[Errno 113] No route to host]
2015-11-27 06:34:09,366 - url_helper.py[WARNING]: Calling 'http://169.254.169.254/2009-04-04/meta-data/instance-id' failed [10/15s]: request error [[Errno 113] No route to host]
2015-11-27 06:34:12,367 - url_helper.py[WARNING]: Calling 'http://169.254.169.254/2009-04-04/meta-data/instance-id' failed [13/15s]: request error [[Errno 113] No route to host]
2015-11-27 06:34:13,370 - url_helper.py[WARNING]: Calling 'http://169.254.169.254/2009-04-04/meta-data/instance-id' failed [14/15s]: request error [[Errno 115] Operation now in progress]
2015-11-27 06:34:14,371 - DataSourceEc2.py[CRITICAL]: Giving up on md from ['http://169.254.169.254/2009-04-04/meta-data/instance-id'] after 15 seconds
2015-11-27 06:34:14,371 - util.py[WARNING]: No instance datasource found! Likely bad things to come!
Starting cloud-init: Can not apply stage config, no datasource found! Likely bad things to come!
------------------------------------------------------------
Traceback (most recent call last):
  File "/usr/bin/cloud-init", line 315, in main_modules
    init.fetch()
  File "/usr/lib/python2.6/site-packages/cloudinit/stages.py", line 307, in fetch
    return self._get_data_source()
  File "/usr/lib/python2.6/site-packages/cloudinit/stages.py", line 235, in _get_data_source
    pkg_list)
  File "/usr/lib/python2.6/site-packages/cloudinit/sources/__init__.py", line 250, in find_source
    raise DataSourceNotFoundException(msg)
DataSourceNotFoundException: Did not find any data source, searched classes: ()
------------------------------------------------------------
Starting cloud-init: Can not apply stage final, no datasource found! Likely bad things to come!
------------------------------------------------------------
Traceback (most recent call last):
  File "/usr/bin/cloud-init", line 315, in main_modules
    init.fetch()
  File "/usr/lib/python2.6/site-packages/cloudinit/stages.py", line 307, in fetch
    return self._get_data_source()
  File "/usr/lib/python2.6/site-packages/cloudinit/stages.py", line 235, in _get_data_source
    pkg_list)
  File "/usr/lib/python2.6/site-packages/cloudinit/sources/__init__.py", line 250, in find_source
    raise DataSourceNotFoundException(msg)
DataSourceNotFoundException: Did not find any data source, searched classes: ()
------------------------------------------------------------