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cant create or delete instances

Hi Everyone,

I have setup openstack Juno env with 1 compute, network and controller node by following the steps in the following link.

http://docs.openstack.org/juno/install-guide/install/yum/content/ch_overview.html

After setting up all the components when i tried to create an instance it nevers boots up and ends in Error state. I am also not able to delete the same instance in error state. I checked on the controller node all nova services are running fine with the smiley. I am seeing below errors/warnings in logs for Nova scheduler

2015-04-23 11:25:40.092 4002 INFO nova.filters [req-a6d0494e-9ec7-4dd8-aee1-241e008aa7e4 None] Filter RetryFilter returned 0 hosts

and nova-conductor

2015-04-23 11:25:40.109 4034 WARNING nova.scheduler.driver [req-a6d0494e-9ec7-4dd8-aee1-241e008aa7e4 None] [instance: 7483942a-7530-4e9f-b8df-f0b9e54303d1] NoValidHost exception with message: 'No valid host was found.' 2015-04-23 11:25:40.110 4034 WARNING nova.scheduler.driver [req-a6d0494e-9ec7-4dd8-aee1-241e008aa7e4 None] [instance: 7483942a-7530-4e9f-b8df-f0b9e54303d1] Setting instance to ERROR state.

I dont see any other errors in logs. Does any one know what could be the possible issue?