i am new to openstack.

I have deployed devstack (on a virtual machine),  and I can successfully deploy instances at the host where the controller is installed.

I followed the instructions from https://docs.openstack.org/nova/queens/install/compute-install-ubuntu.html

to add a new compute host, in order to be able to deploy VMs at the PC. 

Here is the output:

openstack compute service list --service nova-compute
+----+--------------+-----------+------+---------+-------+----------------------------+
| ID | Binary       | Host      | Zone | Status  | State | Updated At                 |
+----+--------------+-----------+------+---------+-------+----------------------------+
|  3 | nova-compute | openstack | nova | enabled | up    | 2020-11-11T07:10:41.000000 |
|  5 | nova-compute | computenode      | nova | enabled | up    | 2020-11-11T07:10:42.000000 |
+----+--------------+-----------+------+---------+-------+----------------------------+

"computenode" is the new device that i added.

When i try to deploy an instance from cli:

openstack server create --flavor m1.tiny --image cirros034  --nic net-id=internal --security-group c8b06902-6664-4776-a8e9-0735ae251d34 --availability-zone nova:computenode mym--debug

the reply i see from horizon is since there is an error in deploying the instance

No valid host was found. No such host - host: computenode node: None  

any directions?

all the best,

Pavlos