def removeLink(self, node1=None, node2=None):
assert node1 is not None
assert node2 is not None
if isinstance(node1, VirtualInstance):
node1 = node1.switch
if isinstance(node2, VirtualInstance):
node2 = node2.switch
return Containernet.removeLink(self, node1=node1, node2=node2)
def addLink(self, node1, node2, **params):
assert node1 is not None
assert node2 is not None
if isinstance(node1, VirtualInstance):
node1 = node1.switch
if isinstance(node2, VirtualInstance):
node2 = node2.switch
return Containernet.addLink(self, node1, node2, **params)
def createNet(
self,
nswitches=1, nhosts=0, ndockers=0,
autolinkswitches=False):
"""
Creates a Mininet instance and automatically adds some
nodes to it.
"""
self.net = Containernet( controller=Controller )
self.net.addController( 'c0' )
# add some switches
for i in range(0, nswitches):
self.s.append(self.net.addSwitch('s%d' % i))
# if specified, chain all switches
if autolinkswitches:
for i in range(0, len(self.s) - 1):
self.net.addLink(self.s[i], self.s[i + 1])
# add some hosts
for i in range(0, nhosts):
self.h.append(self.net.addHost('h%d' % i))
# add some dockers
for i in range(0, ndockers):
self.d.append(self.net.addDocker('d%d' % i, dimage="ubuntu:trusty"))
def topology():
"Create a network with some docker containers acting as hosts."
net = Containernet(controller=Controller)
info('*** Adding controller\n')
net.addController('c0')
info('*** Adding docker containers\n')
d1 = net.addDocker('d1',
ip='10.0.0.251',
dimage="mpeuster/stress",
cpuset_cpus="0,1")
d1.sendCmd("./start.sh")
info('*** Starting network\n')
net.start()
info('*** Running CLI\n')
CLI(net)
info('*** Stopping network')
net.stop()
class simpleTestTopology( unittest.TestCase ):
"""
Helper class to do basic test setups.
s1 -- s2 -- s3 -- ... -- sN
"""
def __init__(self, *args, **kwargs):
self.net = None
self.s = [] # list of switches
self.h = [] # list of hosts
self.d = [] # list of docker containers
self.docker_cli = None
super(simpleTestTopology, self).__init__(*args, **kwargs)
def createNet(
self,
nswitches=1, nhosts=0, ndockers=0,
autolinkswitches=False):
"""
Creates a Mininet instance and automatically adds some
nodes to it.
"""
self.net = Containernet( controller=Controller )
self.net.addController( 'c0' )
# add some switches
for i in range(0, nswitches):
self.s.append(self.net.addSwitch('s%d' % i))
# if specified, chain all switches
if autolinkswitches:
for i in range(0, len(self.s) - 1):
self.net.addLink(self.s[i], self.s[i + 1])
# add some hosts
for i in range(0, nhosts):
self.h.append(self.net.addHost('h%d' % i))
# add some dockers
for i in range(0, ndockers):
self.d.append(self.net.addDocker('d%d' % i, dimage="ubuntu:trusty"))
def startNet(self):
self.net.start()
def stopNet(self):
self.net.stop()
def getDockerCli(self):
"""
Helper to interact with local docker instance.
"""
if self.docker_cli is None:
self.docker_cli = docker.APIClient(
base_url='unix://var/run/docker.sock')
return self.docker_cli
@staticmethod
def setUp():
pass
@staticmethod
def tearDown():
cleanup()
# make sure that all pending docker containers are killed
with open(os.devnull, 'w') as devnull:
subprocess.call(
"docker rm -f $(docker ps --filter 'label=com.containernet' -a -q)",
stdout=devnull,
stderr=devnull,
shell=True)
def getContainernetContainers(self):
"""
List the containers managed by containernet
"""
return self.getDockerCli().containers(filters={"label": "com.containernet"})
#!/usr/bin/python
"""
This is the most simple example to showcase Containernet.
"""
from src.mininet.net import Containernet
from src.mininet.node import Controller
from src.mininet.cli import CLI
from src.mininet.link import TCLink
from src.mininet.log import info, setLogLevel
setLogLevel('info')
net = Containernet(controller=Controller)
info('*** Adding controller\n')
net.addController('c0')
info('*** Adding docker containers\n')
d1 = net.addDocker('d1', ip='10.0.0.251', dimage="ubuntu:trusty")
d2 = net.addDocker('d2', ip='10.0.0.252', dimage="ubuntu:trusty")
info('*** Adding switches\n')
s1 = net.addSwitch('s1')
s2 = net.addSwitch('s2')
info('*** Creating links\n')
net.addLink(d1, s1)
net.addLink(s1, s2, cls=TCLink, delay='100ms', bw=1)
net.addLink(s2, d2)
info('*** Starting network\n')
net.start()
info('*** Testing connectivity\n')
net.ping([d1, d2])
info('*** Running CLI\n')
CLI(net)
info('*** Stopping network')
def __init__(self, **params):
Containernet.__init__(self, **params)
self.vinsts = {}
#!/usr/bin/python
"""
This topology is used to test the compatibility of different Docker images.
The images to be tested can be found in 'examples/example-containers'.
They are build with './build.sh'
"""
from src.mininet.net import Containernet
from src.mininet.node import Controller
from src.mininet.cli import CLI
from src.mininet.link import TCLink
from src.mininet.log import info, setLogLevel
setLogLevel('info')
net = Containernet(controller=Controller)
info('*** Adding controller\n')
net.addController('c0')
info('*** Adding docker containers\n')
d1 = net.addDocker('d1', dimage="ubuntu:trusty")
d2 = net.addDocker('d2', dimage="containernet_example:ubuntu1404")
d3 = net.addDocker('d3', dimage="containernet_example:ubuntu1604")
d4 = net.addDocker('d4', dimage="containernet_example:ubuntu1804")
d5 = net.addDocker('d5', dimage="containernet_example:centos6")
d6 = net.addDocker('d6', dimage="containernet_example:centos7")
info('*** Adding switches\n')
s1 = net.addSwitch('s1')
info('*** Creating links\n')
net.addLink(d1, s1)
net.addLink(d2, s1)