# OEDL Script showing how to get and use a list of resources previously

# provisioned for the slice context within which this experiment trial is being

# executed.

#

# - we start by getting the list of resources provisioned for our slice

# - we filter that list of resources to only retain the 'node' ones

# - then we randomly pick a few of these nodes

# - finally, we create a new group with these randomly picked nodes and

# associate a ping app to them

#

loadOEDL('https://raw.githubusercontent.com/mytestbed/oml4r/master/omf/ping-oml2.rb')

defProperty('target', "127.0.0.1", "Host to ping")

# getResources returns an array of resources (previously added to the Slice)

# each element of that array has attributes similar to the following:

# "client_id": "some_id_for_that_node",

# "status": "ready",

# "omf_id": "the_id_by_which_that_node_can_be_used_in_an_OEDL_script",

# "sliver_id": "urn:publicid:IDN+instageni.foo.edu+sliver+1234",

# "ssh_login": {

# "hostname": "pc1.instageni.foo.edu",

# "port": "12345"

# },

# "interfaces": {

# "some_id_for_that_node:if0": {

# "client_id": "some_id_for_that_node:if0",

# "sliver_id": "urn:publicid:IDN+instageni.foo.edu+sliver+1234",

# "mac_address": "01234567890a",

# "ip": [

# {

# "address": "10.10.1.1",

# "type": "ipv4"

# }

# ]

# }

# },

# "urn": "urn:publicid:IDN+instageni.foo.edu+sliver+1234",

# "type": "node"

available_resources = getResources()

nodes = available_resources.map { |res| res.omf_id if res.type == 'node' }.compact

random_nodes = nodes.sample(2)

info "------ Found #{available_resources.length} available resources"

info "------ Including #{nodes.length} available nodes"

random_nodes.map { |n| info "------ Randomly picked: #{n}" }

defGroup("Random_Workers", random_nodes) do |group|

group.addApplication("ping") do |app|

app.setProperty('dest_addr', property.target)

app.measure('ping', samples: 1)

end

end

onEvent :ALL_UP_AND_INSTALLED do

allGroups.startApplications

after 40 do

allGroups.stopApplications

Experiment.done

end

end

defGraph 'Workers' do |g|

g.ms('ping').select {[ oml_ts_client.as(:time), :rtt, oml_sender_id.as(:name) ]}

g.caption "Ping RTT vs Time, for each Workers"

g.type 'line_chart3'

g.mapping :x_axis => :time, :y_axis => :rtt, :group_by => :name

g.xaxis :legend => 'time [s]'

g.yaxis :legend => 'Ping RTT [ms]', :ticks => {:format => 's'}

end