code: def kill_node(config_file, yes, override_cluster_name):
      
  
      config = yaml.load(open(config_file).read())
      if override_cluster_name is not None:
          config["cluster_name"] = override_cluster_name
      config = _bootstrap_config(config)
  
      confirm("This will kill a node in your cluster", yes)
  
      provider = get_node_provider(config["provider"], config["cluster_name"])
      try:
          nodes = provider.non_terminated_nodes({TAG_RAY_NODE_TYPE: "worker"})
          node = random.choice(nodes)
          logger.info("kill_node: Terminating worker {}".format(node))
  
          updater = NodeUpdaterThread(
              node_id=node,
              provider_config=config["provider"],
              provider=provider,
              auth_config=config["auth"],
              cluster_name=config["cluster_name"],
              file_mounts=config["file_mounts"],
              initialization_commands=[],
              setup_commands=[],
              runtime_hash="")
  
          _exec(updater, "ray stop", False, False)
  
          time.sleep(5)
  
          if config.get("provider", {}).get("use_internal_ips", False) is True:
              node_ip = provider.internal_ip(node)
          else:
              node_ip = provider.external_ip(node)
      finally:
          provider.cleanup()
  
      return node_ip
docs: Kills a random Raylet worker.