#
# 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 .
#
# Author: Alina Quereilhac
# Alexandros Kouvakas
from nepi.execution.attribute import Attribute, Flags, Types
from nepi.execution.resource import ResourceManager, clsinit_copy, \
ResourceState
from nepi.resources.planetlab.openvswitch.ovs import OVSWitch
from nepi.resources.planetlab.node import PlanetlabNode
from nepi.resources.linux.application import LinuxApplication
reschedule_delay = "0.5s"
@clsinit_copy
class OVSPort(LinuxApplication):
"""
.. class:: Class Args :
:param ec: The Experiment controller
:type ec: ExperimentController
:param guid: guid of the RM
:type guid: int
"""
_rtype = "OVSPort"
_help = "Runs an OpenVSwitch on a PlanetLab host"
_backend = "planetlab"
_authorized_connections = ["OVSWitch", "Tunnel"]
@classmethod
def _register_attributes(cls):
""" Register the attributes of OVSPort RM
"""
port_name = Attribute("port_name", "Name of the port",
flags = Flags.ExecReadOnly)
cls._register_attribute(port_name)
def __init__(self, ec, guid):
"""
:param ec: The Experiment controller
:type ec: ExperimentController
:param guid: guid of the RM
:type guid: int
"""
super(OVSPort, self).__init__(ec, guid)
self._port_number = None
self.port_info = []
@property
def node(self):
rm_list = self.get_connected(OVSWitch.get_rtype())
if rm_list:
for elt in rm_list:
node = elt.get_connected(PlanetlabNode.get_rtype())
if node: return node[0]
return node[0]
@property
def ovswitch(self):
ovswitch = self.get_connected(OVSWitch.get_rtype())
if ovswitch: return ovswitch[0]
return None
@property
def port_number(self):
return self._port_number
def valid_connection(self, guid):
# TODO: Validate!
return True
# def valid_connection(self, guid):
# """ Check if the connection is available.
# :param guid: Guid of the current RM
# :type guid: int
# :rtype: Boolean
# """
# rm = self.ec.get_resource(guid)
# if rm.get_rtype() in self._authorized_connections:
# msg = "Connection between %s %s and %s %s accepted" % (self.get_rtype(), self._guid, rm.get_rtype(), guid)
# self.debug(msg)
# return True
# msg = "Connection between %s %s and %s %s refused" % (self.get_rtype(), self._guid, rm.get_rtype(), guid)
# self.debug(msg)
def get_host_ip(self):
""" Get the hostname of the node that
the port belongs to. We use it for tunnel.
"""
get_host_ip = self.node
if not get_host_ip:
msg = "info_list is empty"
self.debug(msg)
raise RuntimeError, msg
import socket
self.port_info.append(get_host_ip.get('hostname'))
self.port_info.append(socket.gethostbyname(self.port_info[0]))
def create_port(self):
""" Create the desired port
"""
port_name = self.get('port_name')
if not (port_name or self.ovswitch):
msg = "The rm_list is empty or the port name is not assigned\n Failed to create port"
self.error(msg)
self.debug("ovswitch_list = %s and port_name = %s" % (self.ovswitch, port_name) )
raise AttributeError, msg
self.info("Create the port %s on switch %s" % (port_name, self.ovswitch.get('bridge_name')))
self.port_info.append(port_name)
self.port_info.append(self.ovswitch.get('virtual_ip_pref'))
cmd = "sliver-ovs create-port %s %s" % (self.ovswitch.get('bridge_name'), port_name)
self.node.run(cmd, self.ovswitch.ovs_checks,
stderr = "stdout-%s" % port_name,
stdout = "stderr-%s" % port_name,
sudo = True)
def get_local_end(self):
""" Get the local_endpoint of the port
"""
msg = "Discovering the number of the port %s"\
% self.get('port_name')
self.info(msg)
command = "sliver-ovs get-local-endpoint %s"\
% self.get('port_name')
out = err = ""
(out, err), proc = self.node.run_and_wait(command, self.ovswitch.ovs_checks,
shfile = "port_number-%s.sh" % self.get('port_name'),
pidfile = "port_number_pidfile-%s" % self.get('port_name'),
ecodefile = "port_number_exitcode-%s" % self.get('port_name'),
sudo = True,
stdout = "stdout-%s" % self.get('port_name'),
stderr = "stderr-%s" % self.get('port_name'))
if err != "":
msg = "No assignment in attribute port_name"
self.error(msg)
self.debug("You are in the method get_local_end and the port_name = %s" % self.get('port_name'))
raise AttributeError, msg
self._port_number = None
self._port_number = int(out)
self.port_info.append(self._port_number)
self.info("The number of the %s is %s" % (self.get('port_name'), self._port_number))
def switch_connect_command(self, local_port_name,
remote_ip, remote_port_num):
""" Script for switch links
"""
command = ["sliver-ovs"]
command.append("set-remote-endpoint ")
command.append("%s " % local_port_name)
command.append("%s " % remote_ip)
command.append("%s " % remote_port_num)
command = " ".join(command)
command = self.replace_paths(command)
return command
def do_deploy(self):
""" Wait until ovswitch is started
"""
ovswitch = self.ovswitch
if not ovswitch or ovswitch.state < ResourceState.READY:
self.debug("---- RESCHEDULING DEPLOY ---- node state %s " % self.ovswitch.state )
self.ec.schedule(reschedule_delay, self.deploy)
return
self.do_discover()
self.do_provision()
self.get_host_ip()
self.create_port()
self.get_local_end()
self.ovswitch.ovs_status()
super(OVSPort, self).do_deploy()
def do_release(self):
""" Release the port RM means delete the ports
"""
# OVS needs to wait until all associated RMs are released
# to be released
from nepi.resources.planetlab.openvswitch.tunnel import OVSTunnel
rm = self.get_connected(OVSTunnel.get_rtype())
if rm and rm[0].state < ResourceState.STOPPED:
self.ec.schedule(reschedule_delay, self.release)
return
msg = "Deleting the port %s" % self.get('port_name')
self.info(msg)
cmd = "sliver-ovs del_port %s" % self.get('port_name')
(out, err), proc = self.node.run(cmd, self.ovswitch.ovs_checks,
sudo = True)
if proc.poll():
self.error(msg, out, err)
raise RuntimeError, msg
super(OVSPort, self).do_release()