80 lines
2.8 KiB
Python
80 lines
2.8 KiB
Python
# -*- Mode:python; c-file-style:"gnu"; indent-tabs-mode:nil -*- */
|
|
#
|
|
# Copyright (C) 2015-2018, The University of Memphis,
|
|
# Arizona Board of Regents,
|
|
# Regents of the University of California.
|
|
#
|
|
# This file is part of Mini-NDN.
|
|
# See AUTHORS.md for a complete list of Mini-NDN authors and contributors.
|
|
#
|
|
# Mini-NDN is free software: you can redistribute it and/or modify
|
|
# it under the terms of the GNU General Public License as published by
|
|
# the Free Software Foundation, either version 3 of the License, or
|
|
# (at your option) any later version.
|
|
#
|
|
# Mini-NDN is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
# GNU General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU General Public License
|
|
# along with Mini-NDN, e.g., in COPYING.md file.
|
|
# If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
from ndn.experiments.experiment import Experiment
|
|
from ndn.apps.ndn_ping_client import NDNPingClient
|
|
|
|
import time
|
|
|
|
class MCNFailureExperiment(Experiment):
|
|
|
|
def __init__(self, args):
|
|
Experiment.__init__(self, args)
|
|
|
|
self.PING_COLLECTION_TIME_BEFORE_FAILURE = 60
|
|
self.PING_COLLECTION_TIME_AFTER_RECOVERY = 120
|
|
|
|
def getMostConnectedNode(self):
|
|
mcn = max(self.net.hosts, key=lambda host: len(host.intfNames()))
|
|
print "The most connected node is: {}".format(mcn.name)
|
|
return mcn
|
|
|
|
def setup(self):
|
|
if self.options.nPings != 0:
|
|
Experiment.setup(self)
|
|
|
|
def run(self):
|
|
mostConnectedNode = self.getMostConnectedNode()
|
|
|
|
if self.options.nPings != 0:
|
|
self.startPctPings()
|
|
|
|
# After the pings are scheduled, collect pings for 1 minute
|
|
time.sleep(self.PING_COLLECTION_TIME_BEFORE_FAILURE)
|
|
|
|
# Bring down MCN
|
|
self.failNode(mostConnectedNode)
|
|
|
|
# MCN is down for 2 minutes
|
|
time.sleep(int(self.options.arguments.waitTime))
|
|
|
|
# Bring MCN back up
|
|
self.recoverNode(mostConnectedNode)
|
|
|
|
# Restart pings
|
|
if self.options.nPings != 0:
|
|
for nodeToPing in self.pingedDict[mostConnectedNode]:
|
|
NDNPingClient.ping(mostConnectedNode, nodeToPing, self.PING_COLLECTION_TIME_AFTER_RECOVERY)
|
|
|
|
# Collect pings for more seconds after MCN is up
|
|
time.sleep(self.PING_COLLECTION_TIME_AFTER_RECOVERY)
|
|
else:
|
|
self.checkConvergence()
|
|
|
|
@staticmethod
|
|
def parseArguments(parser):
|
|
parser.add_argument("--wait-time", dest="waitTime", default="120",
|
|
help="[Experiment] Generic wait time for experiment use")
|
|
|
|
Experiment.register("mcn-failure", MCNFailureExperiment)
|