import logging
import site
+import time
from subprocess import Popen
import os
from mininet.net import Dockernet
-from mininet.node import Controller, OVSSwitch, OVSKernelSwitch, Switch, Docker, Host, RemoteController
+from mininet.node import Controller, DefaultController, OVSSwitch, OVSKernelSwitch, Docker, RemoteController
from mininet.cli import CLI
-from mininet.log import setLogLevel, info, debug
-from mininet.link import TCLink, Link
+from mininet.link import TCLink
import networkx as nx
-from monitoring import DCNetworkMonitor
-
-from node import Datacenter, EmulatorCompute
-
+from emuvim.dcemulator.monitoring import DCNetworkMonitor
+from emuvim.dcemulator.node import Datacenter, EmulatorCompute
+from emuvim.dcemulator.resourcemodel import ResourceModelRegistrar
class DCNetwork(Dockernet):
"""
This class is used by topology definition scripts.
"""
- def __init__(self, **kwargs):
+ def __init__(self, controller=RemoteController,
+ dc_emulation_max_cpu=1.0, # fraction of overall CPU time for emulation
+ dc_emulation_max_mem=512, # emulation max mem in MB
+ **kwargs):
+ """
+ Create an extended version of a Dockernet network
+ :param dc_emulation_max_cpu: max. CPU time used by containers in data centers
+ :param kwargs: path through for Mininet parameters
+ :return:
+ """
self.dcs = {}
- # create a Mininet/Dockernet network
+
# call original Docker.__init__ and setup default controller
- #Dockernet.__init__(
- # self, controller=RemoteController, switch=OVSKernelSwitch, **kwargs)
Dockernet.__init__(
- self, controller=RemoteController, switch=OVSKernelSwitch, **kwargs)
- self.addController('c0', controller=RemoteController)
+ self, switch=OVSKernelSwitch, **kwargs)
+
+ # Ryu management
+ self.ryu_process = None
+ if controller == RemoteController:
+ # start Ryu controller
+ self.startRyu()
+
+ # add the specified controller
+ self.addController('c0', controller=controller)
# graph of the complete DC network
- self.DCNetwork_graph=nx.DiGraph()
+ self.DCNetwork_graph = nx.MultiDiGraph()
# monitoring agent
self.monitor_agent = DCNetworkMonitor(self)
- # start Ryu controller
- self.startRyu()
-
+ # initialize resource model registrar
+ self.rm_registrar = ResourceModelRegistrar(
+ dc_emulation_max_cpu, dc_emulation_max_mem)
- def addDatacenter(self, label, metadata={}):
+ def addDatacenter(self, label, metadata={}, resource_log_path=None):
"""
Create and add a logical cloud data center to the network.
"""
if label in self.dcs:
raise Exception("Data center label already exists: %s" % label)
- dc = Datacenter(label, metadata=metadata)
+ dc = Datacenter(label, metadata=metadata, resource_log_path=resource_log_path)
dc.net = self # set reference to network
self.dcs[label] = dc
dc.create() # finally create the data center in our Mininet instance
node2 = node2.switch
# try to give containers a default IP
if isinstance( node1, Docker ):
- if not "params1" in params:
+ if "params1" not in params:
params["params1"] = {}
- if not "ip" in params["params1"]:
+ if "ip" not in params["params1"]:
params["params1"]["ip"] = self.getNextIp()
if isinstance( node2, Docker ):
- if not "params2" in params:
+ if "params2" not in params:
params["params2"] = {}
- if not "ip" in params["params2"]:
+ if "ip" not in params["params2"]:
params["params2"]["ip"] = self.getNextIp()
+ # ensure that we allow TCLinks between data centers
+ # TODO this is not optimal, we use cls=Link for containers and TCLink for data centers
+ # see Dockernet issue: https://github.com/mpeuster/dockernet/issues/3
+ if "cls" not in params:
+ params["cls"] = TCLink
+
+ link = Dockernet.addLink(self, node1, node2, **params)
- link = Dockernet.addLink(self, node1, node2, **params) # TODO we need TCLinks with user defined performance here
+ # try to give container interfaces a default id
+ node1_port_id = node1.ports[link.intf1]
+ if isinstance(node1, Docker):
+ if "id" in params["params1"]:
+ node1_port_id = params["params1"]["id"]
+
+ node2_port_id = node2.ports[link.intf2]
+ if isinstance(node2, Docker):
+ if "id" in params["params2"]:
+ node2_port_id = params["params2"]["id"]
# add edge and assigned port number to graph in both directions between node1 and node2
- self.DCNetwork_graph.add_edge(node1.name, node2.name, \
- {'src_port': node1.ports[link.intf1], 'dst_port': node2.ports[link.intf2]})
- self.DCNetwork_graph.add_edge(node2.name, node1.name, \
- {'src_port': node2.ports[link.intf2], 'dst_port': node1.ports[link.intf1]})
+ # port_id: id given in descriptor (if available, otherwise same as port)
+ # port: portnumber assigned by Dockernet
+
+ self.DCNetwork_graph.add_edge(node1.name, node2.name,
+ attr_dict={'src_port_id': node1_port_id, 'src_port': node1.ports[link.intf1],
+ 'dst_port_id': node2_port_id, 'dst_port': node2.ports[link.intf2]})
+ self.DCNetwork_graph.add_edge(node2.name, node1.name,
+ attr_dict={'src_port_id': node2_port_id, 'src_port': node2.ports[link.intf2],
+ 'dst_port_id': node1_port_id, 'dst_port': node1.ports[link.intf1]})
return link
def stop(self):
# stop Ryu controller
- self.ryu_process.terminate()
- #self.ryu_process.kill()
Dockernet.stop(self)
+ self.stopRyu()
+ # stop the monitor agent
+ self.monitor_agent.stop()
def CLI(self):
CLI(self)
# to remove chain do setChain( src, dst, cmd='del-flows')
- def setChain(self, vnf_src_name, vnf_dst_name, cmd='add-flow'):
+ def setChain(self, vnf_src_name, vnf_dst_name, vnf_src_interface=None, vnf_dst_interface=None, cmd='add-flow'):
+
+ #check if port is specified (vnf:port)
+ if vnf_src_interface is None:
+ # take first interface by default
+ connected_sw = self.DCNetwork_graph.neighbors(vnf_src_name)[0]
+ link_dict = self.DCNetwork_graph[vnf_src_name][connected_sw]
+ vnf_src_interface = link_dict[0]['src_port_id']
+ #vnf_source_interface = 0
+
+ for connected_sw in self.DCNetwork_graph.neighbors(vnf_src_name):
+ link_dict = self.DCNetwork_graph[vnf_src_name][connected_sw]
+ for link in link_dict:
+ #logging.info("{0},{1}".format(link_dict[link],vnf_source_interface))
+ if link_dict[link]['src_port_id'] == vnf_src_interface:
+ # found the right link and connected switch
+ #logging.info("{0},{1}".format(link_dict[link]['src_port_id'], vnf_source_interface))
+ src_sw = connected_sw
+
+ src_sw_inport = link_dict[link]['dst_port']
+ break
+
+ if vnf_dst_interface is None:
+ # take first interface by default
+ connected_sw = self.DCNetwork_graph.neighbors(vnf_dst_name)[0]
+ link_dict = self.DCNetwork_graph[connected_sw][vnf_dst_name]
+ vnf_dst_interface = link_dict[0]['dst_port_id']
+ #vnf_dest_interface = 0
+
+ vnf_dst_name = vnf_dst_name.split(':')[0]
+ for connected_sw in self.DCNetwork_graph.neighbors(vnf_dst_name):
+ link_dict = self.DCNetwork_graph[connected_sw][vnf_dst_name]
+ for link in link_dict:
+ if link_dict[link]['dst_port_id'] == vnf_dst_interface:
+ # found the right link and connected switch
+ dst_sw = connected_sw
+ dst_sw_outport = link_dict[link]['src_port']
+ break
+
+
# get shortest path
- path = nx.shortest_path(self.DCNetwork_graph, vnf_src_name, vnf_dst_name)
+ #path = nx.shortest_path(self.DCNetwork_graph, vnf_src_name, vnf_dst_name)
+ try:
+ path = nx.shortest_path(self.DCNetwork_graph, src_sw, dst_sw)
+ except:
+ logging.info("No path could be found between {0} and {1}".format(vnf_src_name, vnf_dst_name))
+ return "No path could be found between {0} and {1}".format(vnf_src_name, vnf_dst_name)
+
logging.info("Path between {0} and {1}: {2}".format(vnf_src_name, vnf_dst_name, path))
- current_hop = vnf_src_name
+ #current_hop = vnf_src_name
+ current_hop = src_sw
+ switch_inport = src_sw_inport
+
for i in range(0,len(path)):
- next_hop = path[path.index(current_hop)+1]
+ current_node = self.getNodeByName(current_hop)
+ if path.index(current_hop) < len(path)-1:
+ next_hop = path[path.index(current_hop)+1]
+ else:
+ #last switch reached
+ next_hop = vnf_dst_name
+
next_node = self.getNodeByName(next_hop)
if next_hop == vnf_dst_name:
- return "path added between {0} and {1}".format(vnf_src_name, vnf_dst_name)
+ switch_outport = dst_sw_outport
+ logging.info("end node reached: {0}".format(vnf_dst_name))
elif not isinstance( next_node, OVSSwitch ):
logging.info("Next node: {0} is not a switch".format(next_hop))
return "Next node: {0} is not a switch".format(next_hop)
+ else:
+ # take first link between switches by default
+ index_edge_out = 0
+ switch_outport = self.DCNetwork_graph[current_hop][next_hop][index_edge_out]['src_port']
+
+ # take into account that multiple edges are possible between 2 nodes
+ index_edge_in = 0
- switch_inport = self.DCNetwork_graph[current_hop][next_hop]['dst_port']
- next2_hop = path[path.index(current_hop)+2]
- switch_outport = self.DCNetwork_graph[next_hop][next2_hop]['src_port']
+ #switch_inport = self.DCNetwork_graph[current_hop][next_hop][index_edge_in]['dst_port']
- logging.info("add flow in switch: {0} in_port: {1} out_port: {2}".format(next_node.name, switch_inport, switch_outport))
+ #next2_hop = path[path.index(current_hop)+2]
+ #index_edge_out = 0
+ #switch_outport = self.DCNetwork_graph[next_hop][next2_hop][index_edge_out]['src_port']
+ #switch_outport = self.DCNetwork_graph[current_hop][next_hop][index_edge_out]['src_port']
+
+ #logging.info("add flow in switch: {0} in_port: {1} out_port: {2}".format(current_node.name, switch_inport, switch_outport))
# set of entry via ovs-ofctl
# TODO use rest API of ryu to set flow entries to correct witch dpid
- if isinstance( next_node, OVSSwitch ):
+ if isinstance( current_node, OVSSwitch ):
match = 'in_port=%s' % switch_inport
if cmd=='add-flow':
else:
ofcmd=''
- next_node.dpctl(cmd, ofcmd)
-
- current_hop = next_hop
+ current_node.dpctl(cmd, ofcmd)
+ logging.info("add flow in switch: {0} in_port: {1} out_port: {2}".format(current_node.name, switch_inport,
+ switch_outport))
+ # take first link between switches by default
+ if isinstance( next_node, OVSSwitch ):
+ switch_inport = self.DCNetwork_graph[current_hop][next_hop][0]['dst_port']
+ current_hop = next_hop
- return "destination node: {0} not reached".format(vnf_dst_name)
+ return "path added between {0} and {1}".format(vnf_src_name, vnf_dst_name)
+ #return "destination node: {0} not reached".format(vnf_dst_name)
# start Ryu Openflow controller as Remote Controller for the DCNetwork
def startRyu(self):
# start Ryu controller with rest-API
python_install_path = site.getsitepackages()[0]
ryu_path = python_install_path + '/ryu/app/simple_switch_13.py'
- ryu_path2 = python_install_path + '/ryu/app/ofctl_rest.py'
+ ryu_path2 = python_install_path + '/ryu/app/ofctl_rest.py'
# change the default Openflow controller port to 6653 (official IANA-assigned port number), as used by Mininet
# Ryu still uses 6633 as default
ryu_option = '--ofp-tcp-listen-port'
ryu_of_port = '6653'
- ryu_cmd = 'ryu-manager'
- FNULL = open(os.devnull, 'w')
- self.ryu_process = Popen([ryu_cmd, ryu_path, ryu_path2, ryu_option, ryu_of_port], stdout=FNULL, stderr=FNULL)
\ No newline at end of file
+ ryu_cmd = 'ryu-manager'
+ FNULL = open("/tmp/ryu.log", 'w')
+ self.ryu_process = Popen([ryu_cmd, ryu_path, ryu_path2, ryu_option, ryu_of_port], stdout=FNULL, stderr=FNULL)
+ # no learning switch
+ #self.ryu_process = Popen([ryu_cmd, ryu_path2, ryu_option, ryu_of_port], stdout=FNULL, stderr=FNULL)
+ time.sleep(1)
+
+ def stopRyu(self):
+ if self.ryu_process is not None:
+ self.ryu_process.terminate()
+ self.ryu_process.kill()
+
projects / osm / vim-emu.git / blobdiff