Description of problem:
openstack-ceilometer-api.service fails to start.

Version-Release number of selected component (if applicable):
openstack-ceilometer-api-2014.1-2.1.el7ost.noarch
openstack-packstack-2014.1.1-0.11.1.dev1055.el7ost
rhel-guest-image-7.0-20140410.0.x86_64.qcow2

Actual results:
2014-05-09 03:08:58.440 22315 CRITICAL ceilometer [-] ImportError: No module named ipaddr
2014-05-09 03:08:58.440 22315 TRACE ceilometer Traceback (most recent call last):
2014-05-09 03:08:58.440 22315 TRACE ceilometer   File "/usr/bin/ceilometer-api", line 10, in <module>
2014-05-09 03:08:58.440 22315 TRACE ceilometer     sys.exit(api())
2014-05-09 03:08:58.440 22315 TRACE ceilometer   File "/usr/lib/python2.7/site-packages/ceilometer/cli.py", line 96, in api
2014-05-09 03:08:58.440 22315 TRACE ceilometer     srv = app.build_server()
2014-05-09 03:08:58.440 22315 TRACE ceilometer   File "/usr/lib/python2.7/site-packages/ceilometer/api/app.py", line 126, in build_server
2014-05-09 03:08:58.440 22315 TRACE ceilometer     root = VersionSelectorApplication()
2014-05-09 03:08:58.440 22315 TRACE ceilometer   File "/usr/lib/python2.7/site-packages/ceilometer/api/app.py", line 102, in __init__
2014-05-09 03:08:58.440 22315 TRACE ceilometer     self.v2 = setup_app(pecan_config=pc)
2014-05-09 03:08:58.440 22315 TRACE ceilometer   File "/usr/lib/python2.7/site-packages/ceilometer/api/app.py", line 80, in setup_app
2014-05-09 03:08:58.440 22315 TRACE ceilometer     guess_content_type_from_ext=False
2014-05-09 03:08:58.440 22315 TRACE ceilometer   File "/usr/lib/python2.7/site-packages/pecan/__init__.py", line 83, in make_app
2014-05-09 03:08:58.440 22315 TRACE ceilometer     app = Pecan(root, **kw)
2014-05-09 03:08:58.440 22315 TRACE ceilometer   File "/usr/lib/python2.7/site-packages/pecan/core.py", line 206, in __init__
2014-05-09 03:08:58.440 22315 TRACE ceilometer     root = self.__translate_root__(root)
2014-05-09 03:08:58.440 22315 TRACE ceilometer   File "/usr/lib/python2.7/site-packages/pecan/core.py", line 239, in __translate_root__
2014-05-09 03:08:58.440 22315 TRACE ceilometer     module = __import__(name, fromlist=fromlist)
2014-05-09 03:08:58.440 22315 TRACE ceilometer   File "/usr/lib/python2.7/site-packages/ceilometer/api/controllers/root.py", line 21, in <module>
2014-05-09 03:08:58.440 22315 TRACE ceilometer     from ceilometer.api.controllers import v2
2014-05-09 03:08:58.440 22315 TRACE ceilometer   File "/usr/lib/python2.7/site-packages/ceilometer/api/controllers/v2.py", line 44, in <module>
2014-05-09 03:08:58.440 22315 TRACE ceilometer     import wsme
2014-05-09 03:08:58.440 22315 TRACE ceilometer   File "/usr/lib/python2.7/site-packages/wsme/__init__.py", line 1, in <module>
2014-05-09 03:08:58.440 22315 TRACE ceilometer     from wsme.api import signature
2014-05-09 03:08:58.440 22315 TRACE ceilometer   File "/usr/lib/python2.7/site-packages/wsme/api.py", line 7, in <module>
2014-05-09 03:08:58.440 22315 TRACE ceilometer     import wsme.types
2014-05-09 03:08:58.440 22315 TRACE ceilometer   File "/usr/lib/python2.7/site-packages/wsme/types.py", line 15, in <module>
2014-05-09 03:08:58.440 22315 TRACE ceilometer     import ipaddr as ipaddress
2014-05-09 03:08:58.440 22315 TRACE ceilometer ImportError: No module named ipaddr
2014-05-09 03:08:58.440 22315 TRACE ceilometer 


Expected results:

openstack-ceilometer-api ceilometer or one of its dependency pulls the python-ipaddr.

Additional info:
Workaround:
sudo yum install -y python-ipaddr