1 | #
|
---|
2 | # This is a script example, which shows how to run an application on a set of nodes
|
---|
3 | #
|
---|
4 | # The scenario of this experiment involves one set of nodes: 'worker'. We will execute
|
---|
5 | # the appliation command 'tcpdump -A -i ath0 -w /tmp/dump.txt' on all the nodes within
|
---|
6 | # that set. The output of this command for each node will be stored into a text file on
|
---|
7 | # node itself.
|
---|
8 | # Note: to retrieve these outputs, you will need to either use the OML Collection
|
---|
9 | # Framework (see other tutorials), or directly copy the required text file from the
|
---|
10 | # corresponding node.
|
---|
11 | #
|
---|
12 | # In this example we:
|
---|
13 | # 1) Define a new Application, which will be a wrapper around the tcpdump application
|
---|
14 | # 2) Define a set of nodes which contains 1 node: [1,1] that will run the application
|
---|
15 | # 3) Run the application
|
---|
16 | #
|
---|
17 |
|
---|
18 | # 1)
|
---|
19 | # Define a new application
|
---|
20 | # The following declaration defines a new application which as a URI 'tcpdumpWrapper'
|
---|
21 | # and the name 'dumpApp'
|
---|
22 | #
|
---|
23 | # To use this Application definition in multiple experiment scripts, place it
|
---|
24 | # into a separate stand-alone file with the name 'tcpdumpWrapper.rb' in the same
|
---|
25 | # directory as the experiment scripts that would use it. These experiment scripts
|
---|
26 | # will then NOT require this step 1) declaration.
|
---|
27 | #
|
---|
28 | # NOTE: tcpdump output its user message on STDERR and not STDOUT, thus when
|
---|
29 | # running this tutorial script, please ignore false error messages such as:
|
---|
30 | # "ERROR NodeApp: tcpdump: listening on ath0, link-type EN10MB (Ethernet), capture size 96 bytes"
|
---|
31 | #
|
---|
32 | defApplication('tcpdumpWrapper', 'dumpApp') {|app|
|
---|
33 | app.shortDescription = "This is a simple wrapper application around tcpdump"
|
---|
34 | app.path="/usr/sbin/tcpdump -A -i ath0 -w /tmp/dump.txt"
|
---|
35 | }
|
---|
36 |
|
---|
37 | # 2)
|
---|
38 | # Define a set of node that would use the above application
|
---|
39 | #
|
---|
40 | defGroup('worker', [1,1]) {|node|
|
---|
41 |
|
---|
42 | # Configure the wireless interface on the node(s) in this set
|
---|
43 | node.net.w0.mode = "Master"
|
---|
44 | node.net.w0.type = "g"
|
---|
45 | node.net.w0.essid = "tutorial"
|
---|
46 | node.net.w0.ip = "192.168.0.1"
|
---|
47 |
|
---|
48 | # Add the 'tcpdumpWrapper' application to the node(s) in this set
|
---|
49 | node.addApplication('tcpdumpWrapper', 'dumpApp', nil, nil)
|
---|
50 |
|
---|
51 | # Note: the signature of addApplication() is
|
---|
52 | #
|
---|
53 | # addApplication(app, vName, bindings, env)
|
---|
54 | #
|
---|
55 | # 'app' - The application URI or instance
|
---|
56 | # 'vName' - Virtual name given to this app
|
---|
57 | # 'paramBindings' - Parameter bindings for this application
|
---|
58 | # 'env' - Environment to set before starting application
|
---|
59 | }
|
---|
60 |
|
---|
61 | # 3)
|
---|
62 | # When all the nodes are UP, execute the application on them
|
---|
63 | #
|
---|
64 | whenAllUp() {|node|
|
---|
65 |
|
---|
66 | # Wait 10 sec to make sure that the wireless interfaces are all
|
---|
67 | # configured
|
---|
68 | wait 10
|
---|
69 |
|
---|
70 | # Start all the applications
|
---|
71 | allGroups.startApplications
|
---|
72 |
|
---|
73 | # Wait 10 sec that will be the application duration time
|
---|
74 | wait 10
|
---|
75 |
|
---|
76 | # Stop the experiment
|
---|
77 | Experiment.done
|
---|
78 | }
|
---|