My system is Ubuntu 14.04 I have a single node devstack installation. It works fine, but when I restart the system, It gives following error on Login

ConnectionError at /admin/

HTTPConnectionPool(host='170.95.204.121', port=8774): Max retries exceeded with url: /v2/cb84a60a66974c898b9414d97e54035e/extensions (Caused by <class 'socket.error'="">: [Errno 111] Connection refused)

I cannot telnet on NOVA, I checked nova service status

sudo nova-manage service list

and got this

2014-07-23 15:16:06.134 DEBUG nova.servicegroup.drivers.db [req-f272aa32-2df9-4345-9287-72cb806e5e04 None None] Seems service is down. Last heartbeat was 2014-07-23 08:33:46. Elapsed time is 4340.134154 from (pid=4072) is_up /opt/stack/nova/nova/servicegroup/drivers/db.py:75
nova-conductor   shubham-OptiPlex-9020                internal         enabled    XXX   2014-07-23 08:33:46
2014-07-23 15:16:06.134 DEBUG nova.servicegroup.drivers.db [req-f272aa32-2df9-4345-9287-72cb806e5e04 None None] Seems service is down. Last heartbeat was 2014-07-23 08:33:46. Elapsed time is 4340.134391 from (pid=4072) is_up /opt/stack/nova/nova/servicegroup/drivers/db.py:75
nova-compute     shubham-OptiPlex-9020                nova             enabled    XXX   2014-07-23 08:33:46
2014-07-23 15:16:06.134 DEBUG nova.servicegroup.drivers.db [req-f272aa32-2df9-4345-9287-72cb806e5e04 None None] Seems service is down. Last heartbeat was 2014-07-23 08:33:49. Elapsed time is 4337.134543 from (pid=4072) is_up /opt/stack/nova/nova/servicegroup/drivers/db.py:75
nova-cert        shubham-OptiPlex-9020                internal         enabled    XXX   2014-07-23 08:33:49
2014-07-23 15:16:06.134 DEBUG nova.servicegroup.drivers.db [req-f272aa32-2df9-4345-9287-72cb806e5e04 None None] Seems service is down. Last heartbeat was 2014-07-23 08:33:46. Elapsed time is 4340.13468 from (pid=4072) is_up /opt/stack/nova/nova/servicegroup/drivers/db.py:75
nova-network     shubham-OptiPlex-9020                internal         enabled    XXX   2014-07-23 08:33:46
2014-07-23 15:16:06.134 DEBUG nova.servicegroup.drivers.db [req-f272aa32-2df9-4345-9287-72cb806e5e04 None None] Seems service is down. Last heartbeat was 2014-07-23 08:33:47. Elapsed time is 4339.134808 from (pid=4072) is_up /opt/stack/nova/nova/servicegroup/drivers/db.py:75
nova-scheduler   shubham-OptiPlex-9020                internal         enabled    XXX   2014-07-23 08:33:47
2014-07-23 15:16:06.134 DEBUG nova.servicegroup.drivers.db [req-f272aa32-2df9-4345-9287-72cb806e5e04 None None] Seems service is down. Last heartbeat was 2014-07-23 08:33:47. Elapsed time is 4339.134934 from (pid=4072) is_up /opt/stack/nova/nova/servicegroup/drivers/db.py:75
nova-consoleauth shubham-OptiPlex-9020                internal         enabled    XXX   2014-07-23 08:33:47

Horizon is up, but some service are down. Is this some permission issue or are we looking on a potential bug.