Hi, is the compute node already discovered? Is the compute node visible in the output of: controller:~ # nova-manage cell_v2 list_hosts If not, you can run controller:~ # nova-manage cell_v2 discover_hosts and see if that helps. Regards, Eugen Zitat von Pavlos Basaras <pbasaras@gmail.com>:

Dear community,

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