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https://github.com/opennetworkinglab/onos.git
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894eab5711
multicluster.py creates two ONOS "clusters" (1 node by default, though larger are possible), each of which is responsible for a separate segment of the data network. Change-Id: I233c9884b565bd6a28fa1a05e990e86207c88347
95 lines
3.3 KiB
Python
Executable File
95 lines
3.3 KiB
Python
Executable File
#!/usr/bin/python
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"""
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multicluster.py: multiple ONOS clusters example
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We create two ONOSClusters, "east" and "west", and
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a LinearTopo data network where the first and second halves
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of the network are connected to each ONOSCluster,
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respectively.
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The size of the ONOSCluster is determined by its
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topology. In this example the topology is a
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SingleSwitchTopo of size 1, so the "Cluster" is
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actually a single node (for performance and
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resource usage reasons.) However, it is possible
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to use larger cluster sizes in a large (!) Mininet VM,
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(e.g. 12 GB of RAM for two 3-node ONOS clusters.)
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The MultiSwitch class is a customized version of
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ONOSOVSSwitch that has a "controller" instance variable
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(and parameter)
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"""
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from mininet.net import Mininet
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from mininet.topo import LinearTopo, SingleSwitchTopo
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from mininet.log import setLogLevel
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from mininet.topolib import TreeTopo
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from mininet.clean import cleanup
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from onos import ONOSCluster, ONOSOVSSwitch, ONOSCLI, RenamedTopo
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class MultiSwitch( ONOSOVSSwitch ):
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"Custom OVSSwitch() subclass that connects to different clusters"
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def __init__( self, *args, **kwargs ):
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"controller: controller/ONOSCluster to connect to"
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self.controller = kwargs.pop( 'controller', None )
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ONOSOVSSwitch.__init__( self, *args, **kwargs )
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def start( self, controllers ):
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"Start and connect to our previously specified controller"
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return ONOSOVSSwitch.start( self, [ self.controller ] )
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def run():
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"Test a multiple ONOS cluster network"
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setLogLevel( 'info' )
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# East and west control network topologies (using RenamedTopo)
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# We specify switch and host prefixes to avoid name collisions
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# East control switch prefix: 'east_cs', ONOS node prefix: 'east_onos'
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# Each network is a renamed SingleSwitchTopo of size clusterSize
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# It's also possible to specify your own control network topology
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clusterSize = 1
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etopo = RenamedTopo( SingleSwitchTopo, clusterSize,
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snew='east_cs', hnew='east_onos' )
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wtopo = RenamedTopo( SingleSwitchTopo, clusterSize,
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snew='west_cs', hnew='west_onos' )
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# east and west ONOS clusters
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# Note that we specify the NAT node names to avoid name collisions
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east = ONOSCluster( 'east', topo=etopo, ipBase='192.168.123.0/24',
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nat='enat0' )
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west = ONOSCluster( 'west', topo=wtopo, ipBase='192.168.124.0/24',
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nat='wnat0' )
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# Data network topology
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topo = LinearTopo( 10 )
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# Create network
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net = Mininet( topo=topo, switch=MultiSwitch, controller=[ east, west ] )
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# Assign switches to controllers
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count = len( net.switches )
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for i, switch in enumerate( net.switches ):
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switch.controller = east if i < count/2 else west
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# Start up network
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net.start()
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ONOSCLI( net ) # run our special unified Mininet/ONOS CLI
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net.stop()
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# Add a "controllers" command to ONOSCLI
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def do_controllers( self, line ):
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"List controllers assigned to switches"
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cmap = {}
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for s in self.mn.switches:
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c = getattr( s, 'controller', None ).name
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cmap.setdefault( c, [] ).append( s.name )
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for c in sorted( cmap.keys() ):
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switches = ' '.join( cmap[ c ] )
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print '%s: %s' % ( c, switches )
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ONOSCLI.do_controllers = do_controllers
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if __name__ == '__main__':
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run()
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