How to delete a node label by command and api?

Question

Add label to nodes:

$ kubectl label nodes 10.xx.xx.xx key1=val1  

If I want to delete label(key1=val1) on node(10.xx.xx.xx), how can I delete by kubectl command and API?

Answer 1

create labels for the nodes:

kubectl label node <nodename> <labelname>=allow

delete above labels from its respecitve nodes:

kubectl label node <nodename> <labelname>-