wiki:GEC22Agenda/LabWiki/ModuleD

Version 3 (modified by eswer18@gmail.com, 5 years ago) (diff)

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Module D: Extend experiment script

In this module, we will take a look at the modifications that have to be made in the experiment script to evaluate correct functionality of both learning switches in the extended topology. This example shows that it is relatively easy to adapt an existing OEDL script to an extended or slightly modified topology.

defProperty('source1', "nodea-extend1", "ID of a resource")
defProperty('source2', "switch1-extend1", "ID of a resource")
defProperty('source3', "switch2-extend1", "ID of a resource")
peak_list = []

defProperty('sinkaddr12', '192.168.1.7', "Ping destination address")
defProperty('sinkaddr13', '192.168.1.8', "Ping destination address")

defProperty('sinkaddr21', '192.168.1.13', "Ping destination address")
defProperty('sinkaddr23', '192.168.1.14', "Ping destination address")
defProperty('sinkaddr24', '192.168.1.15', "Ping destination address")
defProperty('sinkaddr11', '192.168.1.6', "Ping destination address")

defApplication('ping') do |app|
  app.description = 'Simple Definition for the ping-oml2 application'
  # Define the path to the binary executable for this application
  app.binary_path = '/usr/local/bin/ping-oml2'
  # Define the configurable parameters for this application
  # For example if target is set to foo.com and count is set to 2, then the 
  # application will be started with the command line:
  # /usr/bin/ping-oml2 -a foo.com -c 2
  app.defProperty('target', 'Address to ping', '-a', {:type => :string})
  app.defProperty('count', 'Number of times to ping', '-c', {:type => :integer})
  # Define the OML2 measurement point that this application provides.
  # Here we have only one measurement point (MP) named 'ping'. Each measurement
  # sample from this MP will be composed of a 4-tuples (addr,ttl,rtt,rtt_unit)
  app.defMeasurement('ping') do |m|
    m.defMetric('dest_addr',:string)
    m.defMetric('ttl',:uint32)
    m.defMetric('rtt',:double)
    m.defMetric('rtt_unit',:string)
  end
end

defApplication('trema') do |app|
  app.description = 'This app runs trema from command line'
  app.binary_path = '/bin/sh /root/ovs-setup2.sh'
end
defGroup('Source2', property.source2, property.source3) do |node|
  node.addApplication("trema")
end
defGroup('Source1', property.source1) do |node|
  node.addApplication("ping") do |app|
    app.setProperty('target', property.sinkaddr12)
    app.setProperty('count', 30)
    #app.setProperty('interval', 1)
    app.measure('ping', :samples => 1)
  end
  node.addApplication("ping") do |app|
    app.setProperty('target', property.sinkaddr13)
    app.setProperty('count', 30)
    #app.setProperty('interval', 1)
    app.measure('ping', :samples => 1)
  end
   node.addApplication("ping") do |app|
    app.setProperty('target', property.sinkaddr21)
    app.setProperty('count', 30)
    #app.setProperty('interval', 1)
    app.measure('ping', :samples => 1)
  end
   node.addApplication("ping") do |app|
    app.setProperty('target', property.sinkaddr23)
    app.setProperty('count', 30)
    #app.setProperty('interval', 1)
    app.measure('ping', :samples => 1)
  end
  node.addApplication("ping") do |app|
    app.setProperty('target', property.sinkaddr24)
    app.setProperty('count', 30)
    #app.setProperty('interval', 1)
    app.measure('ping', :samples => 1)
  end
end

defGroup('Source3', property.source1) do |node|
  node.addApplication("ping") do |app|
    app.setProperty('target', property.sinkaddr11)
    app.setProperty('count', 30)
    #app.setProperty('interval', 1)
    app.measure('ping', :samples => 1)
  end
end

defEvent(:MY_EVENT, every: 0.5) do
# Query for some measurements...
  # returns an array where each element is a hash representing a row from the DB
  query = ms('ping').select { [ :remote] }
  data = defQuery(query)
  triggered = false
  if !data.nil? && !(last_row = data.pop).nil? # Make sure we have some data
    next if peak_list.include?(last_row[:remote]) # Do nothing if we have seen this sample before
    if !peak_list.include?(last_row[:remote])
      peak_list << last_row[:remote] # record that sample, so we dont trigger on it again
    end
    if peak_list.include?('192.168.1.7')&&peak_list.include?('192.168.1.8')&&peak_list.include?('192.168.1.13')&&peak_list.include?('192.168.1.14')&&peak_list.include?('192.168.1.15')
      
      triggered = true
    end
  end
  triggered
end
onEvent :MY_EVENT do
  group('Source3').startApplications
end

onEvent(:ALL_UP_AND_INSTALLED) do |event|
  info "Starting the ping"
  after 2 do
    group('Source2').startApplications
  end
  after 20 do
    group('Source1').startApplications
  end
  after 80 do
    info "Stopping the ping"
    allGroups.stopApplications
    Experiment.done
  end
end

defGraph 'RTT' do |g|
  g.ms('ping').select(:oml_seq, :dest_addr, :rtt) 
  g.caption "RTT of received packets."
  g.type 'line_chart3'
  g.mapping :x_axis => :oml_seq, :y_axis => :rtt, :group_by => :dest_addr
  g.xaxis :legend => 'oml_seq'
  g.yaxis :legend => 'rtt', :ticks => {:format => 's'}
end

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