X-Git-Url: https://osm.etsi.org/gitweb/?a=blobdiff_plain;f=src%2Femuvim%2Fdcemulator%2Fnet.py;h=f7fafdf7a5c5b95975f1575e39fc1367afa21556;hb=461941c38b3981b78fa9238bc5b4282b08c7bac3;hp=0bef2fa8a899b5f55d5ff768b174f57268f720b9;hpb=df6cd75e31d6d9c19662d90a2d112040b76ef8c9;p=osm%2Fvim-emu.git diff --git a/src/emuvim/dcemulator/net.py b/src/emuvim/dcemulator/net.py index 0bef2fa..f7fafdf 100755 --- a/src/emuvim/dcemulator/net.py +++ b/src/emuvim/dcemulator/net.py @@ -8,6 +8,9 @@ import site 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 @@ -18,7 +21,6 @@ from emuvim.dcemulator.monitoring import DCNetworkMonitor from emuvim.dcemulator.node import Datacenter, EmulatorCompute from emuvim.dcemulator.resourcemodel import ResourceModelRegistrar - class DCNetwork(Dockernet): """ Wraps the original Mininet/Dockernet class and provides @@ -27,7 +29,7 @@ class DCNetwork(Dockernet): 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): @@ -55,8 +57,14 @@ class DCNetwork(Dockernet): # graph of the complete DC network self.DCNetwork_graph = nx.MultiDiGraph() + # initialize pool of vlan tags to setup the SDN paths + self.vlans = range(4096)[::-1] + # 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( @@ -119,22 +127,46 @@ class DCNetwork(Dockernet): if isinstance(node1, Docker): if "id" in params["params1"]: node1_port_id = params["params1"]["id"] + node1_port_name = link.intf1.name node2_port_id = node2.ports[link.intf2] if isinstance(node2, Docker): if "id" in params["params2"]: node2_port_id = params["params2"]["id"] + node2_port_name = link.intf2.name + # 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_nr': node1.ports[link.intf1], + 'src_port_name': node1_port_name, + 'dst_port_id': node2_port_id, 'dst_port_nr': node2.ports[link.intf2], + 'dst_port_name': node2_port_name} + 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_nr': node2.ports[link.intf2], + 'src_port_name': node2_port_name, + 'dst_port_id': node1_port_id, 'dst_port_nr': node1.ports[link.intf1], + 'dst_port_name': node1_port_name} + attr_dict2.update(attr_dict) + self.DCNetwork_graph.add_edge(node2.name, node1.name, attr_dict=attr_dict2) return link @@ -176,34 +208,56 @@ class DCNetwork(Dockernet): 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() + 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, **kwargs): + cmd = kwargs.get('cmd') + if cmd == 'add-flow': + ret = self._chainAddFlow(vnf_src_name, vnf_dst_name, vnf_src_interface, vnf_dst_interface, **kwargs) + if kwargs.get('bidirectional'): + return ret +'\n' + self._chainAddFlow(vnf_dst_name, vnf_src_name, vnf_dst_interface, vnf_src_interface, **kwargs) + + elif cmd == 'del-flows': # TODO: del-flow to be implemented + ret = self._chainAddFlow(vnf_src_name, vnf_dst_name, vnf_src_interface, vnf_dst_interface, **kwargs) + if kwargs.get('bidirectional'): + return ret + '\n' + self._chainAddFlow(vnf_dst_name, vnf_src_name, vnf_dst_interface, vnf_src_interface, **kwargs) + + else: + return "Command unknown" + + def _chainAddFlow(self, vnf_src_name, vnf_dst_name, vnf_src_interface=None, vnf_dst_interface=None, **kwargs): + + # TODO: this needs to be cleaned up #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'] + src_sw_inport_nr = link_dict[link]['dst_port_nr'] break if vnf_dst_interface is None: @@ -211,7 +265,6 @@ class DCNetwork(Dockernet): 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): @@ -220,26 +273,33 @@ class DCNetwork(Dockernet): 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'] + dst_sw_outport_nr = link_dict[link]['src_port_nr'] break # 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) + # returns the first found shortest path + # if all shortest paths are wanted, use: all_shortest_paths + path = nx.shortest_path(self.DCNetwork_graph, src_sw, dst_sw, weight=kwargs.get('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("Path between {0} and {1}: {2}".format(vnf_src_name, vnf_dst_name, path)) - #current_hop = vnf_src_name current_hop = src_sw - switch_inport = src_sw_inport + switch_inport_nr = src_sw_inport_nr + + # choose free vlan if path contains more than 1 switch + if len(path) > 1: + vlan = self.vlans.pop() + else: + vlan = None for i in range(0,len(path)): current_node = self.getNodeByName(current_hop) + if path.index(current_hop) < len(path)-1: next_hop = path[path.index(current_hop)+1] else: @@ -249,7 +309,7 @@ class DCNetwork(Dockernet): next_node = self.getNodeByName(next_hop) if next_hop == vnf_dst_name: - switch_outport = dst_sw_outport + switch_outport_nr = dst_sw_outport_nr 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)) @@ -257,44 +317,60 @@ class DCNetwork(Dockernet): 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_outport_nr = self.DCNetwork_graph[current_hop][next_hop][index_edge_out]['src_port_nr'] - #switch_inport = self.DCNetwork_graph[current_hop][next_hop][index_edge_in]['dst_port'] - #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 + # set of entry via ovs-ofctl if isinstance( current_node, OVSSwitch ): - match = 'in_port=%s' % switch_inport - - if cmd=='add-flow': - action = 'action=%s' % switch_outport - s = ',' - ofcmd = s.join([match,action]) - elif cmd=='del-flows': - ofcmd = match - else: - ofcmd='' - - 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)) + kwargs['vlan'] = vlan + kwargs['path'] = path + kwargs['current_hop'] = current_hop + self._set_flow_entry_dpctl(current_node, switch_inport_nr, switch_outport_nr, **kwargs) + # TODO set entry via Ryu REST api (in case emulator is running remote...) + # take first link between switches by default if isinstance( next_node, OVSSwitch ): - switch_inport = self.DCNetwork_graph[current_hop][next_hop][0]['dst_port'] + switch_inport_nr = self.DCNetwork_graph[current_hop][next_hop][0]['dst_port_nr'] current_hop = next_hop return "path added between {0} and {1}".format(vnf_src_name, vnf_dst_name) - #return "destination node: {0} not reached".format(vnf_dst_name) + + def _set_flow_entry_dpctl(self, node, switch_inport_nr, switch_outport_nr, **kwargs): + match = 'in_port=%s' % switch_inport_nr + + cookie = kwargs.get('cookie') + match_input = kwargs.get('match') + cmd = kwargs.get('cmd') + path = kwargs.get('path') + current_hop = kwargs.get('current_hop') + vlan = kwargs.get('vlan') + + s = ',' + if cookie: + cookie = 'cookie=%s' % cookie + match = s.join([cookie, match]) + if match_input: + match = s.join([match, match_input]) + if cmd == 'add-flow': + action = 'action=%s' % switch_outport_nr + if vlan != None: + if path.index(current_hop) == 0: # first node + action = ('action=mod_vlan_vid:%s' % vlan) + (',output=%s' % switch_outport_nr) + match = '-O OpenFlow13 ' + match + elif path.index(current_hop) == len(path) - 1: # last node + match += ',dl_vlan=%s' % vlan + action = 'action=strip_vlan,output=%s' % switch_outport_nr + else: # middle nodes + match += ',dl_vlan=%s' % vlan + ofcmd = s.join([match, action]) + elif cmd == 'del-flows': + ofcmd = match + else: + ofcmd = '' + + node.dpctl(cmd, ofcmd) + logging.info("{3} in switch: {0} in_port: {1} out_port: {2}".format(node.name, switch_inport_nr, + switch_outport_nr, cmd)) # start Ryu Openflow controller as Remote Controller for the DCNetwork def startRyu(self):