from containernet.cli import CLI
from containernet.link import TCLink
from containernet.net import Containernet
setLogLevel('info')
net = Containernet(controller=Controller)
info('*** Adding controller\n')
net.addController('c0')
info('*** Adding docker containers\n')
server = net.addDocker('server',
ip='10.0.0.251',
dcmd="python app.py",
dimage="server_example:latest")
client = net.addDocker('client', ip='10.0.0.252', dimage="curl_example:latest")
info('*** Adding switches\n')
s1 = net.addSwitch('s1')
s2 = net.addSwitch('s2')
info('*** Creating links\n')
net.addLink(server, s1)
net.addLink(s1, s2, cls=TCLink, delay='100ms', bw=1)
net.addLink(s2, client)
info('*** Starting network\n')
net.start()
info('\nclient.cmd("time curl 10.0.0.251/9999"):\n')
info(client.cmd("time curl 10.0.0.251/9999") + "\n")
info('*** Running CLI\n')
CLI(net)
info('*** Stopping network')
net.stop()
setLogLevel('info')
net = Containernet(controller=Controller)
info('*** Adding controller\n')
net.addController('c0')
info('*** Adding docker containers\n')
d1 = net.addDocker('d1',
volumes=["/home/user/vol1:/vol1"],
ip='10.0.0.251',
dimage="ubuntu:trusty")
d2 = net.addDocker('d2',
volumes=["/home/user/vol1:/vol1"],
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, d2)
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')
net.stop()
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)
net.addLink(d3, s1)
net.addLink(d4, s1)
net.addLink(d5, s1)
net.addLink(d6, s1)
info('*** Starting network\n')
net.start()
info('*** Testing connectivity\n')
net.ping([d2, d1])
net.ping([d3, d1])
net.ping([d4, d1])
net.ping([d5, d1])
net.ping([d6, d1])
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()
self.s = []
self.h = []
self.d = []
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"})
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 hosts\n')
h1 = net.addHost('h1')
h2 = net.addHost('h2')
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",
cpu_period=50000,
cpu_quota=25000)
d3 = net.addHost('d3',
ip='11.0.0.253',
cls=Docker,
dimage="ubuntu:trusty",
cpu_shares=20)
# using advanced features like volumes and exposed ports
net.addDocker('d5',
dimage="ubuntu:trusty",
volumes=["/:/mnt/vol1:rw"],
ports=[9999],
port_bindings={9999: 9999},
publish_all_ports=True)
info('*** Adding switch\n')
s1 = net.addSwitch('s1')
s2 = net.addSwitch('s2', cls=OVSSwitch)
s3 = net.addSwitch('s3')
info('*** Creating links\n')
net.addLink(h1, s1)
net.addLink(s1, d1)
net.addLink(h2, s2)
net.addLink(d2, s2)
net.addLink(s1, s2)
#net.addLink(s1, s2, cls=TCLink, delay="100ms", bw=1, loss=10)
# try to add a second interface to a docker container
net.addLink(d2, s3, params1={"ip": "11.0.0.254/8"})
net.addLink(d3, s3)
info('*** Starting network\n')
net.start()
net.ping([d1, d2])
# our extended ping functionality
net.ping([d1], manualdestip="10.0.0.252")
net.ping([d2, d3], manualdestip="11.0.0.254")
info('*** Dynamically add a container at runtime\n')
d4 = net.addDocker('d4', dimage="ubuntu:trusty")
# we have to specify a manual ip when we add a link at runtime
net.addLink(d4, s1, params1={"ip": "10.0.0.254/8"})
# other options to do this
#d4.defaultIntf().ifconfig("10.0.0.254 up")
#d4.setIP("10.0.0.254")
net.ping([d1], manualdestip="10.0.0.254")
info('*** Running CLI\n')
CLI(net)
info('*** Stopping network')
net.stop()