def METHOD_NAME(kubectl_cmd_prefix):
    pod_cmd = ' '.join(kubectl_cmd_prefix) + " get pods | awk '($3 ~\"Running\"){print $1; exit}'"
    # Run in shell because of pipe operation.
    pod_name = str(subprocess.check_output(pod_cmd, shell=True).decode('utf-8')).strip()
    if not pod_name:
        msg_exit("No running pod is found.")
    print("Found running pod: {}".format(pod_name))
    return pod_name