lantz
b7c412073a
Ubuntu 20.04 fixes:
- fixes sshd test
- speeds up examples/{treeping64,tree1024}.py
- debugging hacks/output for testLinkChange
- removes cfs from examples/popen.py
- improves nat in nodelib (netplan fixes?)
- makes some tests executable
- waits for switches to connect in tests to
avoid race conditions
-- adds mn -w option and wait CLI command
Changes:
- REMOVES default "-v" argument for Controller()
and adds verbose(=False) option; avoiding logging
makes it faster
- CHANGES waitConnected to wait for 5 seconds
as documented; we may wish to implement an argument
to -w to set this timeout
Issues?
- There may still be an issue with the ovs-netplan-clean
service causing the boot to hang ;-(
34 lines
888 B
Python
Executable File
34 lines
888 B
Python
Executable File
#!/usr/bin/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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