Dear users, 

I am getting problem while creating an instance . It not able to determine valid host. 

I have  noticed when i restart nova compute service , it restarted successfully  BUT  It logs error on nova-compute.log

2019-11-30 06:29:30.324 145061 ERROR nova.compute.resource_tracker [req-6a4d7b4f-9ab1-4669-8c7e-99e3adb5cb18 - - - - -] Skipping removal of allocations for deleted instances: Failed to retrieve allocations for resource provider 27a39914-a509-4261-90f5-8135ad471843: <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">

: ResourceProviderAllocationRetrievalFailed: Failed to retrieve allocations for resource provider 27a39914-a509-4261-90f5-8135ad471843: <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
2019-11-30 06:29:30.388 145061 ERROR nova.scheduler.client.report [req-6a4d7b4f-9ab1-4669-8c7e-99e3adb5cb18 - - - - -] [None] Failed to retrieve resource provider tree from placement API for UUID 27a39914-a509-4261-90f5-8135ad471843. Got 500: <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">

UUID is correct 

MariaDB [(none)]> select uuid from nova.compute_nodes where host='openstack.bipul.com';
+--------------------------------------+
| uuid                                 |
+--------------------------------------+
| 27a39914-a509-4261-90f5-8135ad471843 |
+--------------------------------------+
1 row in set (0.000 sec)

MariaDB [(none)]>


1) nova.conf is not changed , It just the same which comes with the distribution 

2) Openstack overall health seems OK, all services are in running state 

3) Problem :   placement url running on port  8778   ( URL : http://<IP address >:8778/placement ) is showing internal server error (500) while accessing via web browser or curl .

4) nova-status upgrade check  also showing error InternalServerError: Internal Server Error (HTTP 500)

5) followed the standard method of installation described in https://www.rdoproject.org/install/packstack/  

6) Attached o/p of log during a nove compute service restart and nova service status 

Appreciate all your help 

Thanks
Bipul