Brian O'Connor

adding onos.py, a work in progress

Change-Id: Idfc2087fd8be2ffa24e7e93c2744fa8b1d46811b
#!/usr/bin/env python
# TODO add onos-app-fwd to features
# TODO check if service is running... i think this might already be done by mn
from mininet.node import Controller, OVSSwitch, CPULimitedHost, RemoteController
from mininet.net import Mininet
from mininet.cli import CLI
from mininet.topo import LinearTopo, Topo
from mininet.log import setLogLevel, info, warn
from mininet.util import quietRun, numCores
from shutil import copyfile
from os import environ, path
from functools import partial
import time
from sys import argv
from time import sleep
class ONOS( Controller ):
#def __init__( self, name, command='/opt/onos/bin/onos-service', **kwargs ):
# Controller.__init__( self, name, command=command, inNamespace=True, **kwargs )
#def __init__( self, name, inNamespace=False, command='controller',
# cargs='-v ptcp:%d', cdir=None, ip="127.0.0.1",
# port=6633, protocol='tcp', **params ):
#self.command = command
#self.cargs = cargs
#self.cdir = cdir
#self.ip = ip
#self.port = port
#self.protocol = protocol
#Node.__init__( self, name, inNamespace=inNamespace,
# ip=ip, **params )
#self.checkListening()
ONOS_DIR = '/opt/onos/'
KARAF_DIR = ONOS_DIR + 'apache-karaf-3.0.1/'
reactive = True
def start( self ):
# switch to the non-root user because karaf gets upset otherwise
# TODO we should look into why....
self.sendCmd( 'sudo su - %s' % self.findUser() )
self.waiting = False
if self.inNamespace:
self.cmd( self.KARAF_DIR + 'bin/instance create %s' % self.name )
src = self.KARAF_DIR + 'etc/org.apache.karaf.features.cfg'
dst = self.KARAF_DIR + 'instances/%s/etc/org.apache.karaf.features.cfg' % self.name
self.cmd( 'cp %s %s' % (src, dst) )
self.updateProperties( dst )
self.cmd( self.KARAF_DIR + 'bin/instance start %s' % self.name )
else:
# we are running in the root namespace, so let's use the root instance
self.cmd( 'rm -rf '+ self.KARAF_DIR + 'data/' )
filename = self.KARAF_DIR + 'etc/org.apache.karaf.features.cfg'
self.updateProperties( filename )
self.cmd( self.KARAF_DIR + 'bin/start' )
#TODO we should wait for startup...
def stop( self ):
if self.inNamespace:
self.cmd( '/opt/onos/apache-karaf-3.0.1/bin/instance stop %s' % self.name )
self.cmd( '/opt/onos/apache-karaf-3.0.1/bin/instance destroy %s' % self.name )
else:
self.cmd( self.ONOS_DIR + 'apache-karaf-3.0.1/bin/stop' )
self.terminate()
def updateProperties( self, filename ):
with open( filename, 'r+' ) as f:
lines = f.readlines()
f.seek(0)
f.truncate()
for line in lines:
#print '?', line,
if 'featuresBoot=' in line:
line = line.rstrip()
#print ord(line[-1]), ord(line[-2]), ord(line[-3])
if self.reactive:
line += ',onos-app-fwd'
line += '\n'
#print '!', line,
f.write( line )
@classmethod
def isAvailable( self ):
return quietRun( 'ls /opt/onos' )
@staticmethod
def findUser():
"Try to return logged-in (usually non-root) user"
try:
# If we're running sudo
return os.environ[ 'SUDO_USER' ]
except:
try:
# Logged-in user (if we have a tty)
return quietRun( 'who am i' ).split()[ 0 ]
except:
# Give up and return effective user
return quietRun( 'whoami' )
class ControlNetwork( Topo ):
"Control Network Topology"
def __init__( self, n, dataController=ONOS, **kwargs ):
"""n: number of data network controller nodes
dataController: class for data network controllers"""
Topo.__init__( self, **kwargs )
# Connect everything to a single switch
cs0 = self.addSwitch( 'cs0' )
# Add hosts which will serve as data network controllers
for i in range( 0, n ):
c = self.addHost( 'c%s' % i, cls=dataController,
inNamespace=True )
self.addLink( c, cs0 )
# Connect switch to root namespace so that data network
# switches will be able to talk to us
root = self.addHost( 'root', inNamespace=False )
self.addLink( root, cs0 )
class ONOSCluster( Controller ):
# TODO
n = 4
def start( self ):
ctopo = ControlNetwork( n=self.n, dataController=ONOS )
self.cnet = Mininet( topo=ctopo, ipBase='192.168.123.0/24', controller=None )
self.cnet.addController( 'cc0', controller=Controller )
self.cnet.start()
self.ctrls = []
for host in self.cnet.hosts:
if isinstance( host, Controller ):
self.ctrls.append( host )
host.start()
def stop( self ):
self.cnet.stop()
def clist( self ):
"Return list of Controller proxies for this ONOS cluster"
print 'controllers:', self.ctrls
return self.ctrls
class OVSSwitchONOS( OVSSwitch ):
"OVS switch which connects to multiple controllers"
def start( self, controllers ):
assert len( controllers ) == 1
c0 = controllers[ 0 ]
assert type( c0 ) == ONOSCluster
controllers = c0.clist()
OVSSwitch.start( self, controllers )
controllers = { 'onos': ONOS }
switches = { 'ovso': OVSSwitchONOS }
if __name__ == '__main__':
# Simple test for ONOS() controller class
setLogLevel( 'info' )
size = 2 if len( argv ) != 2 else int( argv[ 1 ] )
net = Mininet( topo=LinearTopo( size ),
controller=partial( ONOSCluster, n=4 ),
switch=OVSSwitchONOS )
net.start()
#waitConnected( net.switches )
CLI( net )
net.stop()