Deployed RKE1 via vmware/rancher integration. Any idea how i can re deploy RKE to a node? It's a control node and it still has all the data, just something happened to where the certs don't match the config for the set ip of the node.

Easy mode: delete the VM and recreate it Hard mode: clean up the node and rke up: https://ranchermanager.docs.rancher.com/how-to-guides/new-user-guides/manage-clusters/clean-cluster-nodes

Using a rancher docker deployment, what is the system that is doing rke up to begin with?

Rancher is... If you are creating nodes with rancher then deleting and recreating them shouldn't be a problem. (Also don't use rancher in docker except for testing)

Gotcha.