Sometimes people create a deployment without liveniess/readiness probe. How can we patch a probe for that deployment.I try to use PATCH + "Content-Type:application/strategic-merge-patch+json" it doesn't work.
On the other hand, if we created a deployment with probe how can we remove it?
You should be able to do
kubectl edit deployment <your deployment>and the yaml from the currently running deployment should pop up in your default editor.
Edit it (add/remove probe) and save and kubectl will apply the new file automatically.
Of course, a better way is to have the deployment yaml on disk, change it to contain the probe and run
kubectl apply -f <the yaml file>