Description of problem:
openstack-gnocchi-statsd.service can sometimes start only on 1/3 controllers when using swift as backend.

Deployment with 3 controllers, 1 compute node and 2 nodes running Heat only services. After deployment:

controller-0 | SUCCESS | rc=0 >>
active


cmd: systemctl is-active openstack-gnocchi-statsd

start: 2017-03-21 10:09:59.074116

end: 2017-03-21 10:09:59.085453

delta: 0:00:00.011337

stdout: active
controller-1 | SUCCESS | rc=0 >>
active


cmd: systemctl is-active openstack-gnocchi-statsd

start: 2017-03-21 10:09:59.305255

end: 2017-03-21 10:09:59.327560

delta: 0:00:00.022305

stdout: active
controller-2 | FAILED | rc=3 >>
failed


cmd: systemctl is-active openstack-gnocchi-statsd

start: 2017-03-21 10:09:59.319084

end: 2017-03-21 10:09:59.337314

delta: 0:00:00.018230

stdout: failed

Checking the logs on the nodes where the service is failed we can see:

[root@controller-2 heat-admin]# tail /var/log/gnocchi/statsd.log 
2017-03-20 22:01:54.502 95788 ERROR gnocchi   File "/usr/lib/python2.7/site-packages/swiftclient/client.py", line 1635, in _retry
2017-03-20 22:01:54.502 95788 ERROR gnocchi     self.url, self.token = self.get_auth()
2017-03-20 22:01:54.502 95788 ERROR gnocchi   File "/usr/lib/python2.7/site-packages/swiftclient/client.py", line 1587, in get_auth
2017-03-20 22:01:54.502 95788 ERROR gnocchi     timeout=self.timeout)
2017-03-20 22:01:54.502 95788 ERROR gnocchi   File "/usr/lib/python2.7/site-packages/swiftclient/client.py", line 662, in get_auth
2017-03-20 22:01:54.502 95788 ERROR gnocchi     auth_version=auth_version)
2017-03-20 22:01:54.502 95788 ERROR gnocchi   File "/usr/lib/python2.7/site-packages/swiftclient/client.py", line 580, in get_auth_keystone
2017-03-20 22:01:54.502 95788 ERROR gnocchi     raise ClientException(msg)
2017-03-20 22:01:54.502 95788 ERROR gnocchi ClientException: Unauthorized. Check username, password and tenant name/id.
2017-03-20 22:01:54.502 95788 ERROR gnocchi 


Version-Release number of selected component (if applicable):
openstack-gnocchi-indexer-sqlalchemy-3.0.4-3.el7ost.noarch
openstack-gnocchi-statsd-3.0.4-3.el7ost.noarch
openstack-gnocchi-common-3.0.4-3.el7ost.noarch
openstack-gnocchi-metricd-3.0.4-3.el7ost.noarch
puppet-gnocchi-9.5.0-1.el7ost.noarch
python-gnocchi-3.0.4-3.el7ost.noarch
openstack-gnocchi-api-3.0.4-3.el7ost.noarch
openstack-gnocchi-carbonara-3.0.4-3.el7ost.noarch
python-gnocchiclient-2.6.0-1.el7ost.noarch
openstack-tripleo-heat-templates-6.0.0-0.20170307170102.3134785.0rc2.el7ost.noarch

How reproducible:
Only on this kind of deployment so far.

Steps to Reproduce:
1. Deploy OSP10 with 3 controllers, 1 compute and 2 nodes running Heat only services
2. Check openstack-gnocchi-statsd service on all controllers

Actual results:
Service is failed on 2/3 controllers.

Expected results:
Service gets started on all controllers.

Additional info:
Adding the sosreports. 

Workaround: manually start the service.