When called with a node target, `kubectl debug` will create a run-once
pod in the target node's namespaces.
Kubernetes-commit: 7e63cc8b9d592abbb8a659205555e67b57080837
This first version of `kubectl alpha debug` is an import of the existing
kubectl-debug plugin, which supports adding ephemeral containers to
running pods. This attempts to follow patterns used by other kubectl
commands such as run, exec and scale.
Kubernetes-commit: e5b655938e55e0404545ff73e9239593a27a3272