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.
39 lines
1.0 KiB
Python
Executable File
39 lines
1.0 KiB
Python
Executable File
#!/usr/bin/env python
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"Monitor multiple hosts using popen()/pmonitor()"
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from time import time
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from signal import SIGINT
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from mininet.net import Mininet
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from mininet.topo import SingleSwitchTopo
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from mininet.util import pmonitor
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from mininet.log import setLogLevel, info
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def pmonitorTest( N=3, seconds=10 ):
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"Run pings and monitor multiple hosts using pmonitor"
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topo = SingleSwitchTopo( N )
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net = Mininet( topo, waitConnected=True )
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net.start()
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hosts = net.hosts
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info( "Starting test...\n" )
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server = hosts[ 0 ]
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popens = {}
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for h in hosts:
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popens[ h ] = h.popen('ping', server.IP() )
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info( "Monitoring output for", seconds, "seconds\n" )
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endTime = time() + seconds
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for h, line in pmonitor( popens, timeoutms=500 ):
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if h:
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info( '<%s>: %s' % ( h.name, line ) )
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if time() >= endTime:
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for p in popens.values():
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p.send_signal( SIGINT )
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net.stop()
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if __name__ == '__main__':
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setLogLevel( 'info' )
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pmonitorTest()
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