Description of problem:

Following error is observed when openstack-ceilometer-compute try to send metrics:

2016-06-10 08:19:08.013 21382 ERROR ceilometer.nova_client [-] Cannot use v2 authentication with domain scope
2016-06-10 08:19:08.013 21382 ERROR ceilometer.nova_client Traceback (most recent call last):
2016-06-10 08:19:08.013 21382 ERROR ceilometer.nova_client   File "/usr/lib/python2.7/site-packages/ceilometer/nova_client.py", line 52, in with_logging
2016-06-10 08:19:08.013 21382 ERROR ceilometer.nova_client     return func(*args, **kwargs)
2016-06-10 08:19:08.013 21382 ERROR ceilometer.nova_client   File "/usr/lib/python2.7/site-packages/ceilometer/nova_client.py", line 157, in instance_get_all_
by_host
2016-06-10 08:19:08.013 21382 ERROR ceilometer.nova_client     search_opts=search_opts))
2016-06-10 08:19:08.013 21382 ERROR ceilometer.nova_client   File "/usr/lib/python2.7/site-packages/novaclient/v2/servers.py", line 794, in list
2016-06-10 08:19:08.013 21382 ERROR ceilometer.nova_client     "servers")
2016-06-10 08:19:08.013 21382 ERROR ceilometer.nova_client   File "/usr/lib/python2.7/site-packages/novaclient/base.py", line 242, in _list
2016-06-10 08:19:08.013 21382 ERROR ceilometer.nova_client     resp, body = self.api.client.get(url)
2016-06-10 08:19:08.013 21382 ERROR ceilometer.nova_client   File "/usr/lib/python2.7/site-packages/keystoneauth1/adapter.py", line 178, in get
2016-06-10 08:19:08.013 21382 ERROR ceilometer.nova_client     return self.request(url, 'GET', **kwargs)
2016-06-10 08:19:08.013 21382 ERROR ceilometer.nova_client   File "/usr/lib/python2.7/site-packages/novaclient/client.py", line 95, in request
2016-06-10 08:19:08.013 21382 ERROR ceilometer.nova_client     **kwargs)
2016-06-10 08:19:08.013 21382 ERROR ceilometer.nova_client   File "/usr/lib/python2.7/site-packages/keystoneauth1/adapter.py", line 335, in request
2016-06-10 08:19:08.013 21382 ERROR ceilometer.nova_client     resp = super(LegacyJsonAdapter, self).request(*args, **kwargs)
2016-06-10 08:19:08.013 21382 ERROR ceilometer.nova_client   File "/usr/lib/python2.7/site-packages/keystoneauth1/adapter.py", line 103, in request
2016-06-10 08:19:08.013 21382 ERROR ceilometer.nova_client     return self.session.request(url, method, **kwargs)
2016-06-10 08:19:08.013 21382 ERROR ceilometer.nova_client   File "/usr/lib/python2.7/site-packages/positional/__init__.py", line 94, in inner
2016-06-10 08:19:08.013 21382 ERROR ceilometer.nova_client     return func(*args, **kwargs)
2016-06-10 08:19:08.013 21382 ERROR ceilometer.nova_client   File "/usr/lib/python2.7/site-packages/keystoneauth1/session.py", line 454, in request
2016-06-10 08:19:08.013 21382 ERROR ceilometer.nova_client     auth_headers = self.get_auth_headers(auth)
2016-06-10 08:19:08.013 21382 ERROR ceilometer.nova_client   File "/usr/lib/python2.7/site-packages/keystoneauth1/session.py", line 716, in get_auth_headers
2016-06-10 08:19:08.013 21382 ERROR ceilometer.nova_client     return auth.get_headers(self, **kwargs)
2016-06-10 08:19:08.013 21382 ERROR ceilometer.nova_client   File "/usr/lib/python2.7/site-packages/keystoneauth1/plugin.py", line 90, in get_headers
2016-06-10 08:19:08.013 21382 ERROR ceilometer.nova_client     token = self.get_token(session)
2016-06-10 08:19:08.013 21382 ERROR ceilometer.nova_client   File "/usr/lib/python2.7/site-packages/keystoneauth1/identity/base.py", line 89, in get_token
2016-06-10 08:19:08.013 21382 ERROR ceilometer.nova_client     return self.get_access(session).auth_token
2016-06-10 08:19:08.013 21382 ERROR ceilometer.nova_client   File "/usr/lib/python2.7/site-packages/keystoneauth1/identity/base.py", line 135, in get_access
2016-06-10 08:19:08.013 21382 ERROR ceilometer.nova_client     self.auth_ref = self.get_auth_ref(session)
2016-06-10 08:19:08.013 21382 ERROR ceilometer.nova_client   File "/usr/lib/python2.7/site-packages/keystoneauth1/identity/generic/base.py", line 179, in get_
auth_ref
2016-06-10 08:19:08.013 21382 ERROR ceilometer.nova_client     self._plugin = self._do_create_plugin(session)
2016-06-10 08:19:08.013 21382 ERROR ceilometer.nova_client   File "/usr/lib/python2.7/site-packages/keystoneauth1/identity/generic/base.py", line 168, in _do_
create_plugin
2016-06-10 08:19:08.013 21382 ERROR ceilometer.nova_client     'Cannot use v2 authentication with domain scope')
2016-06-10 08:19:08.013 21382 ERROR ceilometer.nova_client DiscoveryFailure: Cannot use v2 authentication with domain scope
2016-06-10 08:19:08.013 21382 ERROR ceilometer.nova_client 


Version-Release number of selected component (if applicable):

# rpm -q openstack-packstack openstack-puppet-modules
openstack-packstack-8.0.0-0.20160608133626.e531ea5.el7.centos.noarch
openstack-puppet-modules-8.0.0-0.20160520142355.6a3e8bf.el7.centos.noarch

How reproducible:

always

Steps to Reproduce:
1. Install packstack from trunk.rdoproject.org/centos7-master/consistent
2. Install packstack enabling ceilometer

Actual results:

Errors appear in /var/log/ceilometer/compute.log and metrics provided by compute agent as cpu_util are not stored in ceilometer. 

Expected results:

ceilometer-compute-agent should run without errors and metrics should be stored.

Additional info:

https://review.openstack.org/#/c/316334/ introduced parameter auth_project_domain_name by default, which requires v3 api, but we are forcing v2 url from packstack.