Fwd: ORBIT-USER: Improved imaging procedures

Wed Oct 25 18:15:13 EDT 2006

Cute (or not), the message which is trying to tell you that your
topology definition is not correct is throwing an exception.

I fixed that, so please try again. It still won't work for your
definition, but it should give you a more meaningful error message,
something along the lines of:

Expected array with 2 elements denoting x and y, but found [1..20]

Please verify that indeed you get that.

Now to fix the problem, your topology definition should look like:

  defTopology('my:topo:grid', [1..20,1..20])

Also see

/opt/nodehandler-4.1.2/repository/system/topo/all.rb

which means, you will achieve the same using 'system:topo:all'.

-max

On 10/26/06, Vanessa Frias-martinez <vf2001 at cs.columbia.edu> wrote:
>
> when running Max's imageNodes4 i get an error in some rb files...
>
> Imaging nodes: 'my:topo:grid' with image
> 'tmp/node-1-2-2006-10-19-18-52-55.ndz'
>  WARN: init'-s flag' flag is depreciated, use '-k' instead
> Using logfile /etc/nodehandler/nodehandler_log.xml
> DEBUG oconfig: Testbed name: 'grid'
>  INFO init: NodeHandler Version 4.1.2 (1272)
>  INFO init: Experiment ID: grid_2006_10_25_10_43_12
>  INFO ExecApp: Starting application 'commServer':
> /opt/nodehandler-4.1.2/sbin/commServer --iface eth1 -l
> /tmp/commServer-grid_2006_10_25_10_43_12.log
>  INFO Experiment: load system:exp:stdlib
>  INFO prop.resetDelay: resetDelay = 180:Fixnum
>  INFO prop.resetTries: resetTries = 1:Fixnum
>  INFO Experiment: load system:exp:imageNode
>  INFO prop.nodes: nodes = "my:topo:grid":String
>  INFO prop.image: image = "tmp/node-1-2-2006-10-19-18-52-55.ndz":String
>  INFO prop.pxe: pxe = "1.2.0":String
>  INFO Topology: Loading topology 'my:topo:grid'.
> FATAL run: Exception: undefined local variable or method `n' for
> #<Topology:0xa796e9c8> (NameError)
>         /opt/nodehandler-4.1.2/lib/handler/topology.rb:164:in `addNodes'
>         /opt/nodehandler-4.1.2/lib/handler/topology.rb:185:in `addNodes'
>         /opt/nodehandler-4.1.2/lib/handler/topology.rb:184:in `each'
>         /opt/nodehandler-4.1.2/lib/handler/topology.rb:184:in `addNodes'
>         /opt/nodehandler-4.1.2/lib/handler/topology.rb:145:in `add'
>         /opt/nodehandler-4.1.2/lib/handler/topology.rb:128:in `initialize'
>         /opt/nodehandler-4.1.2/lib/handler/topology.rb:46:in `new'
>         /opt/nodehandler-4.1.2/lib/handler/topology.rb:46:in `create'
>         /opt/nodehandler-4.1.2/lib/handler/handlerCommands.rb:28:in
> `defTopology'
>         ./my_topo_grid.rb:1
>         (eval):20:in `require'
>         (eval):20:in `getProc'
>         /opt/nodehandler-4.1.2/lib/handler/oconfig.rb:132:in `call'
>         /opt/nodehandler-4.1.2/lib/handler/oconfig.rb:132:in `load'
>         /opt/nodehandler-4.1.2/lib/handler/topology.rb:22:in `[]'
>         /opt/nodehandler-4.1.2/lib/handler/handlerCommands.rb:66:in
> `defNodes'
>         /opt/nodehandler-4.1.2/repository/system/exp/imageNode.rb:13
>         (eval):20:in `require'
>         (eval):20:in `getProc'
>         /opt/nodehandler-4.1.2/lib/handler/oconfig.rb:132:in `call'
>         /opt/nodehandler-4.1.2/lib/handler/oconfig.rb:132:in `load'
>         /opt/nodehandler-4.1.2/lib/handler/experiment.rb:38:in `load'
>         /opt/nodehandler-4.1.2/app/nodeHandler.rb:179:in `run'
>         /opt/nodehandler-4.1.2/app/nodeHandler.rb:622
>  INFO ExecApp: Application 'commServer' finished
>  INFO run: Experiment grid_2006_10_25_10_43_12 finished after 0:8
> vanessa at console.grid:~
>
> On Wed, 25 Oct 2006, Haris Kremo wrote:
>
> > Vanessa,
> >
> > Below is a message from Max about more robust way of imaging the nodes.
> >
> > Hope it helps,
> >
> > H.
> >
> > ---------- Forwarded message ----------
> > From: Max Ott <max at winlab.rutgers.edu>
> > Date: Oct 7, 2006 9:34 PM
> > Subject: ORBIT-USER: Improved imaging procedures
> > To: orbit-user at winlab.rutgers.edu
> >
> >
> > Folks,
> >
> > I installed a new version of the nodehandler with which I now
> > regularly image the entire grid (or better the approx. 385 nodes which
> > boot up properly) in about 16 minutes with almost half of the time
> > spent coaxing the nodes to boot up.
> >
> > As I haven't tested much more than just imaging and also haven't
> > installed the new agent on anything but the PXE image, the old
> > nodehandler is still there and the new one is called 'nodehandler4'.
> >
> > Similarly, the new imaging command is called 'imageNodes4'
> >
> > $ imageNodes4 -h
> > Usage: /usr/bin/imageNodes4 [topology] [image_file_path]
> >    Example:
> >        /usr/bin/imageNodes4 system:topo:all tmp/image-tridencom-test.ndz
> >
> > It takes two optional arguments, a topology and the image name.
> >
> > Right now, 'topology' is just a fancy way for defining the list of
> > nodes to use, but will in the future include ways to define the
> > additional noise injection settings to get us closer to a real
> > topology.
> >
> > There is a new command 'defTopology' (http://tinyurl.com/pcqo8) which
> > is almost identical to the way 'defNodes' defines the list of nodes. A
> > topology can be saved in its own file and referenced from a defNodes
> > command.
> >
> > For instance, the repository contains a topology containing all nodes
> > in the grid. It's URI is 'system:topo:all' and is simply defined as:
> >
> > defTopology('system:topo:all', [1 .. OConfig['X_MAX'], 1 .. OConfig['Y_MAX']])
> >
> > Now let's assume you want to use two opposing corner nodes and we hard
> > code the grid size to 20x20 (not that I would ever condone hard
> > coding). Create a file 'my_topo_diagonal.rb' and add the following
> > line:
> >
> > defTopology('my:topo:diagonal', [[1,1],[20,20]])
> >
> > Now, you can image those nodes with your image through:
> >
> > $ imageNodes4 my:topo:diagonal my_image.ndz
> >
> > The 'defNodes' command in the new nodehandler will accept a topology
> > URI as the second argument (selector), but we'll announce that when we
> > fully switch over.
> >
> > Also, please don't use a block with the 'defTopology' command. I
> > realized last night that the installed version doesn't properly
> > support that - and I don't want to install the fix without testing it
> > - not sure when that will happen. In other words, the fancy 'circle'
> > example in the wiki page doesn't work, yet. The normal array
> > definitions do work, though.
> >
> > There is still the odd node which sometimes goes deaf during imaging
> > and the current imaging script doesn't detect that and as a result
> > won't finish, but it happens much less frequently than before and I
> > only saw it for > 350 nodes. Hopefully, your experience is similar.
> >
> > Finally, please note that the default topology behavior is
> > 'non-strict', meaning the nodehandler will remove a node from a
> > topology or node set if the node doesn't check in after one additional
> > reboot. The nodehandler will print a warning message but will then
> > continue.
> >
> > So please check if the nodes skipped are important to you.
> >
> > WARN Giving up on node n_19_6
> >
> > Let me know if you have problems and I'll look into it. Don't forget
> > to add the experiment ID to any bug report.
> >
> > Thanks,
> >
> > -max
> >
>

-- 
Dr. Max Ott
Research Program Leader - Network and Pervasive Computing, NICTA Australia
Founder & CTO, Semandex Networks
Research Professor, WINLAB, Rutgers University