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-rwxr-xr-xresources/tools/scripts/topo_reservation.py65
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diff --git a/resources/tools/scripts/topo_reservation.py b/resources/tools/scripts/topo_reservation.py
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+++ b/resources/tools/scripts/topo_reservation.py
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+#!/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())