Issue

No valid host was found. There are not enough hosts available

Environment

• CloudBees Jenkins Enterprise (CJE) 1.0.3
• OpenStack kilo

Resolution

This means the Nova Scheduler could not find a bare metal node suitable for booting the new instance. This in turn usually means a mismatch between resources that Nova expects to find and resources that Ironic advertised to Nova.

You have to check if you have enough bare metal to all your instance type, you have to review these parameters in your cluster-init.config.

storage_instance_type
controller_instance_type
worker_instance_type