#!/usr/bin/env python
#
# NEPI, a framework to manage network experiments
# Copyright (C) 2013 INRIA
#
# This program 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.
#
# This program 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 this program. If not, see .
#
# Authors : Julien Tribino
# Alina Quereilhac
#
# Topology :
#
# Switch1
# /
# /
# /
# Host1
#
#
# Execution example:
#
# $ PYTHONPATH=$PYTHONPATH:src/ python examples/openvswitch/ovs_ping.py -n "192.168.3.0/24" -s -i /~/.ssh/id_rsa
#
from nepi.execution.ec import ExperimentController
import os
from optparse import OptionParser
import sys
import time
def parse_args():
pl_slice = os.environ.get("PL_SLICE")
pl_user = os.environ.get("PL_USER")
pl_pass = os.environ.get("PL_PASS")
identity = os.environ.get("PL_SSHKEY")
usage = ("usage: %prog -a -b "
"-n -C -s -u "
"-p -i ")
switch = "planetlab2.virtues.fi"
host = "planetlab2.ionio.gr"
parser = OptionParser(usage = usage)
parser.add_option("-a", "--host", dest="host",
help="Hostname for PlanetLab host", default=host)
parser.add_option("-b", "--switch", dest="switch",
help="Hostname for PlanetLab switch", default=switch)
parser.add_option("-n", "--vsys_vnet", dest="vsys_vnet",
help="Overlay network address of the form x.x.x.x/yy. "
"Must correspond to the vsys_vnet tag on the PlanetLab slice")
parser.add_option("-C", "--controller", dest="controller",
help="IP address for the OpenFlow controller, if one has been deployed")
parser.add_option("-s", "--slicename", dest="slicename",
help="Name of PlanetLab slice",
default=pl_slice)
parser.add_option("-u", "--pl_user", dest="pl_user",
help="PlanetLab user (email address)",
default=pl_user)
parser.add_option("-p", "--pl_pass", dest="pl_pass",
help="PlanetLab password",
default=pl_pass)
parser.add_option("-i", "--identity", dest="identity",
help="Path to SSH key",
default=identity)
(options, args) = parser.parse_args()
return (options.host, options.switch,
options.vsys_vnet, options.controller, options.slicename,
options.pl_user, options.pl_pass, identity)
(host, switch, vsys_vnet, controller, slicename,
pl_user, pl_pass, identity) = parse_args()
# Create the EC
ec = ExperimentController(exp_id = "ovs_ping")
net = vsys_vnet.split("/")
prefix = net[-1]
network = net[0]
net_segs = network.split(".")
ip1 = "%s.1" % ".".join(net_segs[:-1]) # x.x.x.1
ip2 = "%s.2" % ".".join(net_segs[:-1]) # x.x.x.2
# Add OVS switch
node1 = ec.register_resource("planetlab::Node")
ec.set(node1, "hostname", switch)
ec.set(node1, "username", slicename)
ec.set(node1, "identity", identity)
ec.set(node1, "pluser", pl_user)
ec.set(node1, "plpassword", pl_pass)
ec.set(node1, "cleanExperiment", True)
ec.set(node1, "cleanProcesses", True)
addr1 = "%s/%s" % (ip1, prefix) # x.x.x.1/prefix
ovs = ec.register_resource("planetlab::OVSSwitch")
ec.set(ovs, "bridge_name", "nepi_bridge")
ec.set(ovs, "virtual_ip_pref", addr1)
ec.set(ovs, "controller_ip", controller)
ec.set(ovs, "controller_port", "6633")
ec.register_connection(ovs, node1)
# Add host
node2 = ec.register_resource("planetlab::Node")
ec.set(node2, "hostname", host)
ec.set(node2, "username", slicename)
ec.set(node2, "identity", identity)
ec.set(node2, "pluser", pl_user)
ec.set(node2, "plpassword", pl_pass)
ec.set(node2, "cleanExperiment", True)
ec.set(node2, "cleanProcesses", True)
# Creating overlay
# Add tap device
tap = ec.register_resource("planetlab::Tap")
ec.set(tap, "ip", ip2)
ec.set(tap, "prefix", prefix)
ec.set(tap, "pointopoint", ip1)
ec.register_connection(tap, node2)
# Add ports on OVS
port = ec.register_resource("planetlab::OVSPort")
ec.set(port, "port_name", "nepi_port")
ec.set(port, "network", network)
ec.register_connection(port, ovs)
# Add tunnel between host and switch
tunnel = ec.register_resource("linux::UdpTunnel")
ec.register_connection(port, tunnel)
ec.register_connection(tunnel, tap)
## Ping switch from host
app = ec.register_resource("linux::Application")
ec.set(app, "command", "ping -c5 %s" % ip1)
ec.register_connection(app, node2)
ec.deploy()
ec.wait_finished([app])
# Retreive ping results and save them in a file
ping = ec.trace(app, "stdout")
print ping
# Delete the overlay network
ec.shutdown()