Hello I'm new in Openstack and I want to install Openstack Juno on a 3 Node Configuration with CentOS 7.

1Node Controller 1Node Network 1Node Compute

I have installed all packages like in this instruction: http://docs.openstack.org/juno/instal...

I have created a External Network like this: http://docs.openstack.org/juno/instal...

and all worked well.

Now I want create a tenant network like this: http://docs.openstack.org/juno/instal... and I get after: neutron net-create demo-net

this Error Message: Service Unavailable (HTTP 503) (Request-ID: req-c715e768-6381-44de-b61b-18fd8fff3f2d)

I have tried the command with the Demo and the Admin User.

My /var/log/neutron/server.log:

2015-02-09 13:43:51.576 3044 INFO neutron.wsgi [-] (3044) accepted ('192.168.1.110', 60556)
2015-02-09 13:43:51.634 3044 ERROR neutron.api.v2.resource [req-c715e768-6381-44de-b61b-18fd8fff3f2d None] create failed
2015-02-09 13:43:51.634 3044 TRACE neutron.api.v2.resource Traceback (most recent call last):
2015-02-09 13:43:51.634 3044 TRACE neutron.api.v2.resource   File "/usr/lib/python2.7/site-packages/neutron/api/v2/resource.py", line 87, in resource
2015-02-09 13:43:51.634 3044 TRACE neutron.api.v2.resource     result = method(request=request, **args)
2015-02-09 13:43:51.634 3044 TRACE neutron.api.v2.resource   File "/usr/lib/python2.7/site-packages/neutron/api/v2/base.py", line 448, in create
2015-02-09 13:43:51.634 3044 TRACE neutron.api.v2.resource     obj = obj_creator(request.context, **kwargs)
2015-02-09 13:43:51.634 3044 TRACE neutron.api.v2.resource   File "/usr/lib/python2.7/site-packages/neutron/plugins/ml2/plugin.py", line 499, in create_network
2015-02-09 13:43:51.634 3044 TRACE neutron.api.v2.resource     tenant_id)
2015-02-09 13:43:51.634 3044 TRACE neutron.api.v2.resource   File "/usr/lib/python2.7/site-packages/neutron/plugins/ml2/managers.py", line 160, in create_network_segments
2015-02-09 13:43:51.634 3044 TRACE neutron.api.v2.resource     segment = self.allocate_tenant_segment(session)
2015-02-09 13:43:51.634 3044 TRACE neutron.api.v2.resource   File "/usr/lib/python2.7/site-packages/neutron/plugins/ml2/managers.py", line 192, in allocate_tenant_segment
2015-02-09 13:43:51.634 3044 TRACE neutron.api.v2.resource     raise exc.NoNetworkAvailable()
2015-02-09 13:43:51.634 3044 TRACE neutron.api.v2.resource NoNetworkAvailable: Unable to create the network. No tenant network is available for allocation.
2015-02-09 13:43:51.634 3044 TRACE neutron.api.v2.resource
2015-02-09 13:43:51.635 3044 INFO neutron.wsgi [req-c715e768-6381-44de-b61b-18fd8fff3f2d None] 192.168.1.110 - - [09/Feb/2015 13:43:51] "POST /v2.0/networks.json HTTP/1.1" 503 360 0.058279

I hope you can help me