lantz
f0c726a42f
This helps with virtualenv although it can open up another security hole if you end up using an unexpected python interpreter. Overall it seems to make sense to err on the side of usability but it's good to be aware of security. However, for the remaining utility scripts that require python 2, we explicitly note this with #!/usr/bin/python2.
35 lines
893 B
Python
Executable File
35 lines
893 B
Python
Executable File
#!/usr/bin/env python
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"""
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This example monitors a number of hosts using host.popen() and
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pmonitor()
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"""
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from mininet.net import Mininet
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from mininet.topo import SingleSwitchTopo
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from mininet.log import setLogLevel, info
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from mininet.util import pmonitor
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def monitorhosts( hosts=5 ):
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"Start a bunch of pings and monitor them using popen"
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mytopo = SingleSwitchTopo( hosts )
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net = Mininet( topo=mytopo, waitConnected=True )
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net.start()
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# Start a bunch of pings
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popens = {}
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last = net.hosts[ -1 ]
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for host in net.hosts:
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popens[ host ] = host.popen( "ping -c5 %s" % last.IP() )
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last = host
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# Monitor them and print output
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for host, line in pmonitor( popens ):
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if host:
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info( "<%s>: %s" % ( host.name, line ) )
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# Done
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net.stop()
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if __name__ == '__main__':
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setLogLevel( 'info' )
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monitorhosts( hosts=5 )
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