import re
import requests
import os
+import json
from mininet.net import Containernet
from mininet.node import Controller, DefaultController, OVSSwitch, OVSKernelSwitch, Docker, RemoteController
from mininet.clean import cleanup
import networkx as nx
from emuvim.dcemulator.monitoring import DCNetworkMonitor
-from emuvim.dcemulator.node import Datacenter, EmulatorCompute
+from emuvim.dcemulator.node import Datacenter, EmulatorCompute, EmulatorExtSAP
from emuvim.dcemulator.resourcemodel import ResourceModelRegistrar
LOG = logging.getLogger("dcemulator.net")
# default CPU period used for cpu percentage-based cfs values (microseconds)
CPU_PERIOD = 1000000
+# default priority setting for added flow-rules
+DEFAULT_PRIORITY = 1000
+# default cookie number for new flow-rules
+DEFAULT_COOKIE = 10
+
class DCNetwork(Containernet):
"""
Wraps the original Mininet/Containernet class and provides
self.DCNetwork_graph = nx.MultiDiGraph()
# initialize pool of vlan tags to setup the SDN paths
- self.vlans = range(4096)[::-1]
+ self.vlans = range(1, 4096)[::-1]
# link to Ryu REST_API
ryu_ip = 'localhost'
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])
+ match = re.search('([0-9]*\.?[0-9]+)', str(params[attr]))
if match:
attr_number = match.group(1)
else:
return link
+ def removeLink(self, link=None, node1=None, node2=None):
+ """
+ Remove the link from the Containernet and the networkx graph
+ """
+ if link is not None:
+ node1 = link.intf1.node
+ node2 = link.intf2.node
+ assert node1 is not None
+ assert node2 is not None
+ Containernet.removeLink(self, link=link, node1=node1, node2=node2)
+ # TODO we might decrease the loglevel to debug:
+ try:
+ self.DCNetwork_graph.remove_edge(node2.name, node1.name)
+ except:
+ LOG.warning("%s, %s not found in DCNetwork_graph." % ((node2.name, node1.name)))
+ try:
+ self.DCNetwork_graph.remove_edge(node1.name, node2.name)
+ except:
+ LOG.warning("%s, %s not found in DCNetwork_graph." % ((node1.name, node2.name)))
+
def addDocker( self, label, **params ):
"""
Wrapper for addDocker method to use custom container class.
"""
- self.DCNetwork_graph.add_node(label)
+ self.DCNetwork_graph.add_node(label, type=params.get('type', 'docker'))
return Containernet.addDocker(self, label, cls=EmulatorCompute, **params)
- def removeDocker( self, label, **params ):
+ def removeDocker( self, label, **params):
"""
Wrapper for removeDocker method to update graph.
"""
self.DCNetwork_graph.remove_node(label)
return Containernet.removeDocker(self, label, **params)
+ def addExtSAP(self, sap_name, sap_ip, **params):
+ """
+ Wrapper for addExtSAP method to store SAP also in graph.
+ """
+ # make sure that 'type' is set
+ params['type'] = params.get('type','sap_ext')
+ self.DCNetwork_graph.add_node(sap_name, type=params['type'])
+ return Containernet.addExtSAP(self, sap_name, sap_ip, **params)
+
+ def removeExtSAP(self, sap_name, **params):
+ """
+ Wrapper for removeExtSAP method to remove SAP also from graph.
+ """
+ self.DCNetwork_graph.remove_node(sap_name)
+ return Containernet.removeExtSAP(self, sap_name)
+
def addSwitch( self, name, add_to_graph=True, **params ):
"""
Wrapper for addSwitch method to store switch also in graph.
# add this switch to the global topology overview
if add_to_graph:
- self.DCNetwork_graph.add_node(name)
+ self.DCNetwork_graph.add_node(name, type=params.get('type','switch'))
# set the learning switch behavior
if 'failMode' in params :
s = Containernet.addSwitch(self, name, protocols='OpenFlow10,OpenFlow12,OpenFlow13', failMode=failMode, **params)
- # set flow entry that enables learning switch behavior (needed to enable E-LAN functionality)
- #LOG.info('failmode {0}'.format(failMode))
- #if failMode == 'standalone' :
- # LOG.info('add NORMAL')
- # s.dpctl('add-flow', 'actions=NORMAL')
-
return s
def getAllContainers(self):
kwargs['switch_inport_name'] = src_sw_inport_name
kwargs['switch_outport_name'] = dst_sw_outport_name
kwargs['skip_vlan_tag'] = True
+ kwargs['pathindex'] = i
monitor_placement = kwargs.get('monitor_placement').strip()
# put monitor flow at the dst switch
:param priority: custom flowrule priority
:param monitor: boolean to indicate whether this chain is a monitoring chain
:param tag: vlan tag to be used for this chain (pre-defined or new one if none is specified)
+ :param skip_vlan_tag: boolean to indicate if a vlan tag should be appointed to this flow or not
+ :param path: custom path between the two VNFs (list of switches)
:return: output log string
"""
pass
- cmd = kwargs.get('cmd')
+ cmd = kwargs.get('cmd', 'add-flow')
if cmd == 'add-flow' or cmd == 'del-flows':
ret = self._chainAddFlow(vnf_src_name, vnf_dst_name, vnf_src_interface, vnf_dst_interface, **kwargs)
if kwargs.get('bidirectional'):
+ if kwargs.get('path') is not None:
+ kwargs['path'] = list(reversed(kwargs.get('path')))
ret = ret +'\n' + self._chainAddFlow(vnf_dst_name, vnf_src_name, vnf_dst_interface, vnf_src_interface, **kwargs)
else:
dst_sw_outport_name = link_dict[link]['src_port_name']
break
-
- # get shortest path
- try:
- # 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:
- LOG.exception("No path could be found between {0} and {1} using src_sw={2} and dst_sw={3}".format(
- vnf_src_name, vnf_dst_name, src_sw, dst_sw))
- LOG.debug("Graph nodes: %r" % self.DCNetwork_graph.nodes())
- LOG.debug("Graph edges: %r" % self.DCNetwork_graph.edges())
- for e, v in self.DCNetwork_graph.edges():
- LOG.debug("%r" % self.DCNetwork_graph[e][v])
- return "No path could be found between {0} and {1}".format(vnf_src_name, vnf_dst_name)
+ path = kwargs.get('path')
+ if path is None:
+ # get shortest path
+ try:
+ # 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:
+ LOG.exception("No path could be found between {0} and {1} using src_sw={2} and dst_sw={3}".format(
+ vnf_src_name, vnf_dst_name, src_sw, dst_sw))
+ LOG.debug("Graph nodes: %r" % self.DCNetwork_graph.nodes())
+ LOG.debug("Graph edges: %r" % self.DCNetwork_graph.edges())
+ for e, v in self.DCNetwork_graph.edges():
+ LOG.debug("%r" % self.DCNetwork_graph[e][v])
+ return "No path could be found between {0} and {1}".format(vnf_src_name, vnf_dst_name)
LOG.info("Path between {0} and {1}: {2}".format(vnf_src_name, vnf_dst_name, path))
switch_inport_nr = src_sw_inport_nr
# choose free vlan
- ## if path contains more than 1 switch
cmd = kwargs.get('cmd')
vlan = None
if cmd == 'add-flow':
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]
+ if i < len(path) - 1:
+ next_hop = path[i + 1]
else:
- #last switch reached
+ # last switch reached
next_hop = vnf_dst_name
next_node = self.getNodeByName(next_hop)
switch_outport_nr = self.DCNetwork_graph[current_hop][next_hop][index_edge_out]['src_port_nr']
- # set of entry via ovs-ofctl
+ # set OpenFlow entry
if isinstance( current_node, OVSSwitch ):
kwargs['vlan'] = vlan
kwargs['path'] = path
kwargs['current_hop'] = current_hop
kwargs['switch_inport_name'] = src_sw_inport_name
kwargs['switch_outport_name'] = dst_sw_outport_name
+ kwargs['pathindex'] = i
if self.controller == RemoteController:
## set flow entry via ryu rest api
switch_inport_nr = self.DCNetwork_graph[current_hop][next_hop][0]['dst_port_nr']
current_hop = next_hop
- return "path {2} between {0} and {1}".format(vnf_src_name, vnf_dst_name, cmd)
+ flow_options = {
+ 'priority':kwargs.get('priority', DEFAULT_PRIORITY),
+ 'cookie':kwargs.get('cookie', DEFAULT_COOKIE),
+ 'vlan':kwargs['vlan'],
+ 'path':kwargs['path'],
+ 'match_input':kwargs.get('match')
+ }
+ flow_options_str = json.dumps(flow_options, indent=1)
+ return "success: {2} between {0} and {1} with options: {3}".format(vnf_src_name, vnf_dst_name, cmd, flow_options_str)
def _set_flow_entry_ryu_rest(self, node, switch_inport_nr, switch_outport_nr, **kwargs):
match = 'in_port=%s' % switch_inport_nr
match_input = kwargs.get('match')
cmd = kwargs.get('cmd')
path = kwargs.get('path')
- current_hop = kwargs.get('current_hop')
+ index = kwargs.get('pathindex')
+
vlan = kwargs.get('vlan')
- priority = kwargs.get('priority')
+ priority = kwargs.get('priority', DEFAULT_PRIORITY)
# flag to not set the ovs port vlan tag
skip_vlan_tag = kwargs.get('skip_vlan_tag')
# table id to put this flowentry
if cmd == 'add-flow':
prefix = 'stats/flowentry/add'
if vlan != None:
- if path.index(current_hop) == 0: # first node
+ if index == 0: # first node
# set vlan tag in ovs instance (to isolate E-LANs)
if not skip_vlan_tag:
in_port_name = kwargs.get('switch_inport_name')
action = {}
action['type'] = 'SET_FIELD'
action['field'] = 'vlan_vid'
- action['value'] = vlan
+ # ryu expects the field to be masked
+ action['value'] = vlan | 0x1000
flow['actions'].append(action)
- if path.index(current_hop) == len(path) - 1: # last node
+ elif index == len(path) - 1: # last node
# set vlan tag in ovs instance (to isolate E-LANs)
if not skip_vlan_tag:
out_port_name = kwargs.get('switch_outport_name')
action['type'] = 'POP_VLAN'
flow['actions'].append(action)
- if 0 < path.index(current_hop) < (len(path) - 1): # middle nodes
+ else: # middle nodes
match += ',dl_vlan=%s' % vlan
# output action must come last
match_input = kwargs.get('match')
cmd = kwargs.get('cmd')
path = kwargs.get('path')
- current_hop = kwargs.get('current_hop')
+ index = kwargs.get('pathindex')
vlan = kwargs.get('vlan')
s = ','
if cmd == 'add-flow':
action = 'action=%s' % switch_outport_nr
if vlan != None:
- if path.index(current_hop) == 0: # first node
+ if index == 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
+ elif index == len(path) - 1: # last node
match += ',dl_vlan=%s' % vlan
action = 'action=strip_vlan,output=%s' % switch_outport_nr
else: # middle nodes
dict.update({match[0]:m2})
return dict
- def find_connected_dc_interface(self, vnf_src_name, vnf_src_interface):
+ def find_connected_dc_interface(self, vnf_src_name, vnf_src_interface=None):
+
+ 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']
+
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:
src_sw = connected_sw
src_sw_inport_nr = link_dict[link]['dst_port_nr']
src_sw_inport_name = link_dict[link]['dst_port_name']
- return src_sw_inport_name
\ No newline at end of file
+ return src_sw_inport_name
projects / osm / vim-emu.git / blobdiff