X-Git-Url: https://gerrit.fd.io/r/gitweb?p=csit.git;a=blobdiff_plain;f=resources%2Ftools%2Fscripts%2Ftopo_reservation.py;fp=resources%2Ftools%2Fscripts%2Ftopo_reservation.py;h=4b5ed2459c866054e90d4f402aadd7917f850b47;hp=0000000000000000000000000000000000000000;hb=6721e7f09aa95bff6622068332a3f56afad9c87b;hpb=859157b5db45927c7b4bb0b2d575e68805777a86 diff --git a/resources/tools/scripts/topo_reservation.py b/resources/tools/scripts/topo_reservation.py new file mode 100755 index 0000000000..4b5ed2459c --- /dev/null +++ b/resources/tools/scripts/topo_reservation.py @@ -0,0 +1,65 @@ +#!/usr/bin/env python + +# Copyright (c) 2016 Cisco and/or its affiliates. +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at: +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. + +"""This script provides simple reservation mechanism to avoid + simultaneous use of nodes listed in topology file. + As source of truth is used DUT1 node from the topology file.""" + +import sys +import argparse +from resources.libraries.python.ssh import SSH +from yaml import load + +RESERVATION_DIR = "/tmp/reservation_dir" + +def main(): + parser = argparse.ArgumentParser() + parser.add_argument("-t", "--topo", required=True, + help="Topology file") + parser.add_argument("-c", "--cancel", help="Cancel reservation", + action="store_true") + args = parser.parse_args() + topology_file = args.topo + cancel_reservation = args.cancel + + work_file = open(topology_file) + topology = load(work_file.read())['nodes'] + + #we are using DUT1 node because we expect DUT1 to be a linux host + #we don't use TG because we don't expect TG to be linux only host + try: + tg_node = topology["DUT1"] + except KeyError: + print "Topology file does not contain 'DUT1' node" + return 1 + + ssh = SSH() + ssh.connect(tg_node) + + #For system reservation we use mkdir it is an atomic operation and we can + #store additional data (time, client_ID, ..) within reservation directory + if cancel_reservation: + ret, _, err = ssh.exec_command("rm -r {}".format(RESERVATION_DIR)) + else: + ret, _, err = ssh.exec_command("mkdir {}".format(RESERVATION_DIR)) + + if ret != 0: + print("{} unsuccessful:\n{}". + format(("Cancellation " if cancel_reservation else "Reservation"), + err)) + return ret + +if __name__ == "__main__": + sys.exit(main())