def monitorTest(N=3, seconds=3):
"Run pings and monitor multiple hosts"
topo = SingleSwitchTopo(N)
net = Mininet(topo)
net.start()
hosts = net.hosts
print "Starting test..."
server = hosts[0]
outfiles, errfiles = {}, {}
for h in hosts:
# Create and/or erase output files
outfiles[h] = '/tmp/%s.out' % h.name
errfiles[h] = '/tmp/%s.err' % h.name
h.cmd('echo >', outfiles[h])
h.cmd('echo >', errfiles[h])
# Start pings
h.cmdPrint('ping', server.IP(), '>', outfiles[h], '2>', errfiles[h],
'&')
print "Monitoring output for", seconds, "seconds"
for h, line in monitorFiles(outfiles, seconds, timeoutms=500):
if h:
print '%s: %s' % (h.name, line)
for h in hosts:
h.cmd('kill %ping')
net.stop()
def clusterSanity():
"Sanity check for cluster mode"
topo = SingleSwitchTopo()
net = MininetCluster(topo=topo)
net.start()
CLI(net)
net.stop()
def exampleAllHosts(vlan):
"""Simple example of how VLANHost can be used in a script"""
# This is where the magic happens...
host = partial(VLANHost, vlan=vlan)
# vlan (type: int): VLAN ID to be used by all hosts
# Start a basic network using our VLANHost
topo = SingleSwitchTopo(k=2)
net = Mininet(host=host, topo=topo)
net.start()
CLI(net)
net.stop()
def testHostWithPrivateDirs():
"Test bind mounts"
topo = SingleSwitchTopo( 10 )
privateDirs = [ ( '/var/log', '/tmp/%(name)s/var/log' ),
( '/var/run', '/tmp/%(name)s/var/run' ),
'/var/mn' ]
host = partial( Host,
privateDirs=privateDirs )
net = Mininet( topo=topo, host=host )
net.start()
directories = [ directory[ 0 ] if isinstance( directory, tuple )
else directory for directory in privateDirs ]
info( 'Private Directories:', directories, '\n' )
CLI( net )
net.stop()
def monitorhosts(hosts=5, sched='cfs'):
"Start a bunch of pings and monitor them using popen"
mytopo = SingleSwitchTopo(hosts)
cpu = .5 / hosts
myhost = custom(CPULimitedHost, cpu=cpu, sched=sched)
net = Mininet(topo=mytopo, host=myhost)
net.start()
# Start a bunch of pings
popens = {}
last = net.hosts[-1]
for host in net.hosts:
popens[host] = host.popen("ping -c5 %s" % last.IP())
last = host
# Monitor them and print output
for host, line in pmonitor(popens):
if host:
print "<%s>: %s" % (host.name, line.strip())
# Done
net.stop()
def pmonitorTest(N=3, seconds=10):
"Run pings and monitor multiple hosts using pmonitor"
topo = SingleSwitchTopo(N)
net = Mininet(topo)
net.start()
hosts = net.hosts
print "Starting test..."
server = hosts[0]
popens = {}
for h in hosts:
popens[h] = h.popen('ping', server.IP())
print "Monitoring output for", seconds, "seconds"
endTime = time() + seconds
for h, line in pmonitor(popens, timeoutms=500):
if h:
print '<%s>: %s' % (h.name, line),
if time() >= endTime:
for p in popens.values():
p.send_signal(SIGINT)
net.stop()
def testSingle5( self ):
"Ping test on 5-host single-switch topology"
mn = Mininet( SingleSwitchTopo( k=5 ), self.switchClass, Host,
Controller, waitConnected=True )
dropped = mn.run( mn.ping )
self.assertEqual( dropped, 0 )
def testMinimal( self ):
"Ping test on minimal topology"
mn = Mininet( SingleSwitchTopo(), self.switchClass, Host, Controller,
waitConnected=True )
dropped = mn.run( mn.ping )
self.assertEqual( dropped, 0 )