Post cluster creation - addition of more worker nodes?

[kcalmond]

What is the best way to adapt the automation in this repo to add more worker nodes to a cluster that was created using same automations in this repo?

Here's what I tried: 1 - updated and reran the helper node config with info for the new worker nodes. 2 - Added same entries for new worker nodes in group_vars/all.yml. Then ran ansible-playbook -i staging dhcp_ova.yml

Quickly realized that this wasn't going to work. Instead of only processing changes (the Ansible way, right?...) the play started to add another entire cluster from scratch in a new vCenter folder. I killed the play execution and cleaned up. Then started to research how I can add worker nodes to this cluster. No plan on that yet...