Merge branch 'cdburkard-devel/defaultController'

bin/mn

@@ -25,7 +25,8 @@ from mininet.cli import CLI
 from mininet.log import lg, LEVELS, info, debug, error
 from mininet.net import Mininet, MininetWithControlNet, VERSION
 from mininet.node import ( Host, CPULimitedHost, Controller, OVSController,
-                           NOX, RemoteController, UserSwitch, OVSSwitch,
+                           NOX, RemoteController, DefaultController,
+                           UserSwitch, OVSSwitch,
                            OVSLegacyKernelSwitch, IVSSwitch )
 from mininet.nodelib import LinuxBridge
 from mininet.link import Link, TCLink
@@ -58,11 +59,12 @@ HOSTS = { 'proc': Host,
           'rt': custom( CPULimitedHost, sched='rt' ),
           'cfs': custom( CPULimitedHost, sched='cfs' ) }
 
-CONTROLLERDEF = 'ovsc'
+CONTROLLERDEF = 'default'
 CONTROLLERS = { 'ref': Controller,
                 'ovsc': OVSController,
                 'nox': NOX,
                 'remote': RemoteController,
+                'default': DefaultController,
                 'none': lambda name: None }
 
 LINKDEF = 'default'

mininet/net.py

@@ -96,7 +96,7 @@ from itertools import chain, groupby
 
 from mininet.cli import CLI
 from mininet.log import info, error, debug, output, warn
-from mininet.node import Host, OVSKernelSwitch, Controller
+from mininet.node import Host, OVSKernelSwitch, DefaultController, Controller
 from mininet.link import Link, Intf
 from mininet.util import quietRun, fixLimits, numCores, ensureRoot
 from mininet.util import macColonHex, ipStr, ipParse, netParse, ipAdd
@@ -109,7 +109,7 @@ class Mininet( object ):
     "Network emulation with hosts spawned in network namespaces."
 
     def __init__( self, topo=None, switch=OVSKernelSwitch, host=Host,
-                  controller=Controller, link=Link, intf=Intf,
+                  controller=DefaultController, link=Link, intf=Intf,
                   build=True, xterms=False, cleanup=False, ipBase='10.0.0.0/8',
                   inNamespace=False,
                   autoSetMacs=False, autoStaticArp=False, autoPinCpus=False,
@@ -255,7 +255,7 @@ class Mininet( object ):
         else:
             controller_new = controller( name, **params )
         # Add new controller to net
-        if controller_new:  # allow controller-less setups
+        if controller_new: # allow controller-less setups
             self.controllers.append( controller_new )
             self.nameToNode[ name ] = controller_new
         return controller_new

mininet/node.py

@@ -1277,13 +1277,19 @@ class Controller( Node ):
         return '<%s %s: %s:%s pid=%s> ' % (
             self.__class__.__name__, self.name,
             self.IP(), self.port, self.pid )
-
+    @classmethod
+    def isAvailable( self ):
+        return quietRun( 'which controller' )
 
 class OVSController( Controller ):
     "Open vSwitch controller"
     def __init__( self, name, command='ovs-controller', **kwargs ):
+        if quietRun( 'which test-controller' ):
+            command = 'test-controller'
         Controller.__init__( self, name, command=command, **kwargs )
-
+    @classmethod
+    def isAvailable( self ):
+        return quietRun( 'which ovs-controller' ) or quietRun( 'which test-controller' )
 
 class NOX( Controller ):
     "Controller to run a NOX application."
@@ -1338,3 +1344,10 @@ class RemoteController( Controller ):
         if 'Connected' not in listening:
             warn( "Unable to contact the remote controller"
                   " at %s:%d\n" % ( self.ip, self.port ) )
+
+
+def DefaultController( name, order=[ Controller, OVSController ], **kwargs ):
+    "find any controller that is available and run it"
+    for controller in order:
+        if controller.isAvailable():
+            return controller( name, **kwargs )