Answer by AntonioA for I am trying to get a simple cirrus VM up on a kilo implementation on CentOS with two nodes. One controller and one compute. I get a 'No valid host was found' in the nova-conductor.log file. My nova service list output is: +----+------------------+-----------+----------+---------+-------+----------------------------+-----------------+ | Id | Binary | Host | Zone | Status | State | Updated_at | Disabled Reason | +----+------------------+-----------+----------+---------+-------+----------------------------+-----------------+ | 1 | nova-consoleauth | anders-38 | internal | enabled | up | 2015-06-01T12:52:53.000000 | - | | 2 | nova-conductor | anders-38 | internal | enabled | up | 2015-06-01T12:52:53.000000 | - | | 3 | nova-scheduler | anders-38 | internal | enabled | up | 2015-06-01T12:52:53.000000 | - | | 4 | nova-cert | anders-38 | internal | enabled | up | 2015-06-01T12:52:53.000000 | - | | 5 | nova-compute | anders-21 | nova | enabled | up | 2015-06-01T12:52:57.000000 | - | | 6 | nova-network | anders-21 | internal | enabled | up | 2015-06-01T12:52:57.000000 | - | +----+------------------+-----------+----------+---------+-------+----------------------------+-----------------+ [root@anders-21 ~]# my nova hypervisor-stats output is: [root@anders-21 ~]# nova hypervisor-stats +----------------------+-------+ | Property | Value | +----------------------+-------+ | count | 1 | | current_workload | 0 | | disk_available_least | 91 | | free_disk_gb | 104 | | free_ram_mb | 14789 | | local_gb | 105 | | local_gb_used | 1 | | memory_mb | 15813 | | memory_mb_used | 1024 | | running_vms | 1 | | vcpus | 8 | | vcpus_used | 1 | +----------------------+-------+ Any ideas? Thanks! Don

Sometimes you can receive that errors when the resources on your environments are not enough. I had this error and I have updated the ram allocation attributes into nova.conf (controller => ram_allocation_ratio).