import time
from subprocess import Popen
import os
+import re
+
+
from mininet.net import Dockernet
from mininet.node import Controller, DefaultController, OVSSwitch, OVSKernelSwitch, Docker, RemoteController
This class is used by topology definition scripts.
"""
- def __init__(self, controller=RemoteController,
+ def __init__(self, controller=RemoteController, monitor=False,
dc_emulation_max_cpu=1.0, # fraction of overall CPU time for emulation
dc_emulation_max_mem=512, # emulation max mem in MB
**kwargs):
self.DCNetwork_graph = nx.MultiDiGraph()
# monitoring agent
- self.monitor_agent = DCNetworkMonitor(self)
+ if monitor:
+ self.monitor_agent = DCNetworkMonitor(self)
+ else:
+ self.monitor_agent = None
# initialize resource model registrar
self.rm_registrar = ResourceModelRegistrar(
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
# 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]})
+ attr_dict = {}
+ # possible weight metrics allowed by TClink class:
+ weight_metrics = ['bw', 'delay', 'jitter', 'loss']
+ edge_attributes = [p for p in params if p in weight_metrics]
+ for attr in edge_attributes:
+ # if delay: strip ms (need number as weight in graph)
+ match = re.search('([0-9]*\.?[0-9]+)', params[attr])
+ if match:
+ attr_number = match.group(1)
+ else:
+ attr_number = None
+ attr_dict[attr] = attr_number
+
+
+ attr_dict2 = {'src_port_id': node1_port_id, 'src_port': node1.ports[link.intf1],
+ 'dst_port_id': node2_port_id, 'dst_port': node2.ports[link.intf2]}
+ attr_dict2.update(attr_dict)
+ self.DCNetwork_graph.add_edge(node1.name, node2.name, attr_dict=attr_dict2)
+
+ attr_dict2 = {'src_port_id': node2_port_id, 'src_port': node2.ports[link.intf2],
+ 'dst_port_id': node1_port_id, 'dst_port': node1.ports[link.intf1]}
+ attr_dict2.update(attr_dict)
+ self.DCNetwork_graph.add_edge(node2.name, node1.name, attr_dict=attr_dict2)
return link
Dockernet.start(self)
def stop(self):
- # stop Ryu controller
+
+ # stop the monitor agent
+ if self.monitor_agent is not None:
+ self.monitor_agent.stop()
+
+ # stop emulator net
Dockernet.stop(self)
+
+ # stop Ryu controller
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, vnf_src_interface=None, vnf_dst_interface=None, cmd='add-flow'):
+ def setChain(self, vnf_src_name, vnf_dst_name, vnf_src_interface=None, vnf_dst_interface=None, cmd='add-flow', weight=None):
#check if port is specified (vnf:port)
if vnf_src_interface is None:
# get shortest path
#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)
+ path = nx.shortest_path(self.DCNetwork_graph, src_sw, dst_sw, weight=weight)
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("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
+ # TODO use rest API of ryu to set flow entries to correct dpid
+ # TODO this only sets port in to out, no match, so this will give trouble when multiple services are deployed...
+ # TODO need multiple matches to do this (VLAN tags)
if isinstance( current_node, OVSSwitch ):
match = 'in_port=%s' % switch_inport