#!/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 :
#
# x.x.x.1 x.x.x.2
# Switch1 -------- Switch2
# / \
# / \
# / \
# Host1 Host2
# x.x.x.3 x.x.x.4
#
# Execution example:
#
# $ PYTHONPATH=$PYTHONPATH:src/ python examples/openvswitch/ovs_ping_2_switches.py -n "192.168.3.0/24" -C "1.1.1.1" -s -i /~/.ssh/id_rsa
#
from nepi.execution.ec import ExperimentController
import os
from optparse import OptionParser
import sys
import time
def add_node(ec, host, user, pl_user, pl_password, identity):
node = ec.register_resource("planetlab::Node")
ec.set(node, "hostname", host)
ec.set(node, "username", user)
if identity:
ec.set(node, "identity", identity)
if pl_user:
ec.set(node, "pluser", pl_user)
if pl_password:
ec.set(node, "plpassword", pl_password)
ec.set(node, "cleanExperiment", True)
ec.set(node, "cleanProcesses", True)
return node
def add_ovs(ec, bridge_name, virtual_ip_pref, controller_ip, controller_port, node):
ovs = ec.register_resource("planetlab::OVSSwitch")
ec.set(ovs, "bridge_name", bridge_name)
ec.set(ovs, "virtual_ip_pref", virtual_ip_pref)
ec.set(ovs, "controller_ip", controller_ip)
ec.set(ovs, "controller_port", controller_port)
ec.register_connection(ovs, node)
return ovs
def add_port(ec, port_name, network, ovs):
port = ec.register_resource("planetlab::OVSPort")
ec.set(port, "port_name", port_name)
ec.set(port, "network", network)
ec.register_connection(port, ovs)
return port
def add_tap(ec, ip, prefix, pointopoint, node):
tap = ec.register_resource("planetlab::Tap")
ec.set(tap, "ip", ip)
ec.set(tap, "prefix", prefix)
ec.set(tap, "pointopoint", pointopoint)
ec.set(tap, "up", True)
ec.register_connection(tap, node)
return tap
def add_tunnel(ec, port0, tap):
tunnel = ec.register_resource("linux::UdpTunnel")
ec.register_connection(port0, tunnel)
ec.register_connection(tunnel, tap)
return tunnel
def add_app(ec, command, node):
app = ec.register_resource("linux::Application")
ec.set(app, "command", command)
ec.register_connection(app, node)
return app
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 -c -d "
"-n -C -s -u "
"-p -i ")
switch1 = "planetlab2.virtues.fi"
switch2 = "planetlab2.upc.es"
host1 = "planetlab2.s3.kth.se"
host2 = "iraplab2.iralab.uni-karlsruhe.de"
parser = OptionParser(usage = usage)
parser.add_option("-a", "--host1", dest="host1",
help="Hostname for PlanetLab host 1", default=host1)
parser.add_option("-b", "--host2", dest="host2",
help="Hostname for PlanetLab host 2", default=host2)
parser.add_option("-c", "--switch1", dest="switch1",
help="Hostname for PlanetLab switch 1", default=switch1)
parser.add_option("-d", "--switch2", dest="switch2",
help="Hostname for PlanetLab switch 2", default=switch2)
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",
default="1.1.1.1")
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.host1, options.host2, options.switch1, options.switch2,
options.vsys_vnet, options.controller, options.slicename,
options.pl_user, options.pl_pass, identity)
(host1, host2, switch1, switch2, vsys_vnet, controller, slicename,
pl_user, pl_pass, identity) = parse_args()
# Create the EC
ec = ExperimentController(exp_id = "ovs_2_switch")
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
ip3 = "%s.3" % ".".join(net_segs[:-1]) # x.x.x.3
ip4 = "%s.4" % ".".join(net_segs[:-1]) # x.x.x.4
### Define topology
# Add switches
s1_node = add_node(ec, switch1, slicename, pl_user, pl_pass, identity)
s2_node = add_node(ec, switch2, slicename, pl_user, pl_pass, identity)
# Add OVS switches
addr1 = "%s/%s" % (ip1, prefix) # x.x.x.1/prefix
addr2 = "%s/%s" % (ip2, prefix) # x.x.x.2/prefix
ovs1 = add_ovs(ec, "nepi_bridge_1", addr1, controller, "6633", s1_node)
ovs2 = add_ovs(ec, "nepi_bridge_2", addr2, controller, "6633", s2_node)
# Add ports on OVS
port1 = add_port(ec, "nepi_port1", network, ovs1)
port3 = add_port(ec, "nepi_port3", network, ovs1)
port2 = add_port(ec, "nepi_port2", network, ovs2)
port4 = add_port(ec, "nepi_port4", network, ovs2)
# Add hosts
h1_node = add_node(ec, host1, slicename, pl_user, pl_pass, identity)
h2_node = add_node(ec, host2, slicename, pl_user, pl_pass, identity)
### Add overlay
# Add tap devices
tap1 = add_tap(ec, ip3, prefix, ip1, h1_node)
tap2 = add_tap(ec, ip4, prefix, ip2, h2_node)
# Connect the nodes
tunnel1 = add_tunnel(ec, port1, tap1)
tunnel2 = add_tunnel(ec, port2, tap2)
tunnel3 = add_tunnel(ec, port3, port4)
### Add Ping
app = add_app(ec, "ping -c5 %s" % ip4, h1_node)
ec.deploy()
ec.wait_finished([app])
# Retreive ping results and save them in a file
stdout = ec.trace(app, "stdout")
# Delete the overlay network
ec.shutdown()
print stdout