After the Global Controller node is created, you can scale it up by adding additional worker nodes. You must first update the hosts.ini file with the IP addresses of the worker nodes. Then, you can create worker nodes. To delete worker nodes, you must add the IP addresses of the worker nodes in the [node-remove] section of the hosts.ini file. After that, you can run the Ansible playbook to delete worker nodes.
A user account with passwordless sudo privileges configured is required to create, delete, or configure the Bare Metal Orchestrator worker nodes. For more information about the common user account and passwordless sudo privileges, see Software and node requirements.