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I don't know what happened to MariaDB database or RDO Havana in two recent week , but in meantime :-

I had to update manually table bellow for root & nova passwords at FQDN host :-

[root@dfw01 ~(keystone_admin)]$ mysql -u root -p
Enter password:
Welcome to the MariaDB monitor.  Commands end with ; or \g.
Your MariaDB connection id is 35
Server version: 5.5.34-MariaDB MariaDB Server

Copyright (c) 2000, 2013, Oracle, Monty Program Ab and others.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

MariaDB [(none)]> SELECT User, Host, Password FROM mysql.user;

+----------+-------------------+-------------------------------------------+
| User     | Host              | Password                                  |
+----------+-------------------+-------------------------------------------+
| root     | localhost         | *E0DC09146F1310B49A34199B04274A9EED6F9EC7 |
| root     | dfw01.localdomain | *E0DC09146F1310B49A34199B04274A9EED6F9EC7 |  it's critical
| root     | 127.0.0.1         | *E0DC09146F1310B49A34199B04274A9EED6F9EC7 |
| root     | ::1               | *E0DC09146F1310B49A34199B04274A9EED6F9EC7 |
| keystone | localhost         | *936E8F7AB2E21B47F6C9A7E5D9FE14DBA2255E5A |
| keystone | %                 | *936E8F7AB2E21B47F6C9A7E5D9FE14DBA2255E5A |
| glance   | localhost         | *CC67CAF178CB9A07D756302E0BBFA3B0165DFD49 |
| glance   | %                 | *CC67CAF178CB9A07D756302E0BBFA3B0165DFD49 |
| cinder   | localhost         | *028F8298C041368BA08A280AA8D1EF895CB68D5C |
| cinder   | %                 | *028F8298C041368BA08A280AA8D1EF895CB68D5C |
| neutron  | localhost         | *4DF421833991170108648F1103CD74FCB66BBE9E |
| neutron  | %                 | *03A31004769F9E4F94ECEEA61AA28D9649084839 |
| nova     | localhost         | *0BE3B501084D35F4C66DD3AC4569EAE5EA738212 |
| nova     | %                 | *0BE3B501084D35F4C66DD3AC4569EAE5EA738212 |
| nova     | dfw01.localdomain | *0BE3B501084D35F4C66DD3AC4569EAE5EA738212 |  it's critical
+----------+-------------------+-------------------------------------------+

15 rows in set (0.00 sec)

Otherwise , nothing is going to work , just "allinone" testing. When it's done , Kashyap schema goes ahead on F20 Two Node Real Cluster. I am going to file a bug regarding this updates , because I believe it should be done behind the scene. Updated and inserted rows are responsible for remote connection to controller for nova-compute and neutron-openswitch-agent services.