powercycle x86: add some help text

# Copyright 2019 Holger Levsen <holger@layer-acht.org>

# released under the GPLv2

#

# This script helps powercycling x86 nodes at profitbricks/ionos.

#

# It needs an account and expects the environment variables

# IONOS_USERNAME and IONOS_PASSWORD to be set accordingly.

#

# Then it expects node numbers or 'jenkins' as params.

#

import os

import sys

import json

log.setLevel(logging.INFO)

# log.setLevel(logging.DEBUG)

# expects node numbers or 'jenkins' as params...

nodes = []

for argument in sys.argv[1:]:

    try:

            nodes.append(argument)

        else:

            log.error("Unrecognized node: %s", argument)

            print("This script helps powercycling x86 nodes at profitbricks/IONOS.")

            print()

            print("It needs an account and expects the environment variables IONOS_USERNAME and IONOS_PASSWORD to be set accordingly.")

            print()

            print("Then it expects node numbers or 'jenkins' as params.")

            sys.exit(1)

    else:

        name = "build" + str(node)