-"""
-Distributed Cloud Emulator (dcemulator)
-(c) 2015 by Manuel Peuster <manuel.peuster@upb.de>
-"""
-import logging
-
-from mininet.net import Dockernet
-from mininet.node import Controller, OVSKernelSwitch, Switch, Docker, Host
-from mininet.cli import CLI
-from mininet.log import setLogLevel, info
-from mininet.link import TCLink, Link
-
-from node import Datacenter, EmulatorCompute
-
-
-class DCNetwork(object):
- """
- Wraps the original Mininet class and provides
- methods to add data centers, switches, etc.
-
- This class is used by topology definition scripts.
- """
-
- def __init__(self):
- self.dcs = {}
- self.switches = {}
- self.links = []
-
- # create a Mininet/Dockernet network
- setLogLevel('info') # set Mininet loglevel
- self.mnet = Dockernet(controller=Controller, switch=OVSKernelSwitch)
- self.mnet.addController('c0')
-
- def addDatacenter(self, name):
- """
- Create and add a logical cloud data center to the network.
- """
- if name in self.dcs:
- raise Exception("Data center name already exists: %s" % name)
- dc = Datacenter(name)
- dc.net = self # set reference to network
- self.dcs[name] = dc
- dc.create() # finally create the data center in our Mininet instance
- logging.info("added data center: %s" % name)
- return dc
-
- def addSwitch(self, name):
- """
- We can also add additional SDN switches between data centers.
- """
- s = self.mnet.addSwitch(name)
- self.switches[name] = s
- logging.info("added switch: %s" % name)
- return s
-
- def addLink(self, node1, node2, **params):
- """
- Able to handle Datacenter objects as link
- end points.
- """
- assert node1 is not None
- assert node2 is not None
- logging.debug("addLink: n1=%s n2=%s" % (str(node1), str(node2)))
- # ensure type of node1
- if isinstance( node1, basestring ):
- if node1 in self.dcs:
- node1 = self.dcs[node1].switch
- elif node1 in self.switches:
- node1 = self.switches[node1]
- if isinstance( node1, Datacenter ):
- node1 = node1.switch
- # ensure type of node2
- if isinstance( node2, basestring ):
- if node2 in self.dcs:
- node2 = self.dcs[node2].switch
- elif node2 in self.switches:
- node2 = self.switches[node2]
- if isinstance( node2, Datacenter ):
- node2 = node2.switch
- # try to give containers a default IP
- if isinstance( node1, Docker ):
- if not "params1" in params:
- params["params1"] = {}
- if not "ip" in params["params1"]:
- params["params1"]["ip"] = self.getNextIp()
- if isinstance( node2, Docker ):
- if not "params2" in params:
- params["params2"] = {}
- if not "ip" in params["params2"]:
- params["params2"]["ip"] = self.getNextIp()
-
- return self.mnet.addLink(node1, node2, **params) # TODO we need TCLinks with user defined performance here
-
- def removeLink(self, link=None, node1=None, node2=None):
- """
- Removes a link. Can either be specified by link object,
- or the nodes the link connects. Wraps Dockernet method.
- """
- logging.debug("removeLink: n1=%s n2=%s" % (str(node1), str(node2)))
- return self.mnet.removeLink(link=link, node1=node1, node2=node2)
-
- def addDocker( self, name, **params ):
- """
- Wrapper for addDocker method provided by Dockernet.
- """
- return self.mnet.addDocker( name, cls=EmulatorCompute, **params)
-
- def removeDocker( self, name, **params):
- """
- Wrapper for removeHost. Just to be complete.
- """
- return self.mnet.removeDocker(name, **params)
-
- def getNextIp(self):
- return self.mnet.getNextIp()
-
- def start(self):
- # start
- for dc in self.dcs.itervalues():
- dc.start()
- self.mnet.start()
-
- def stop(self):
- self.mnet.stop()
-
- def CLI(self):
- CLI(self.mnet)