How to update multiple ROS machines simultaneously?

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asked 2011-06-02 02:50:49 -0500

Gonçalo Cabrita

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updated 2011-09-03 20:27:49 -0500

kwc
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Hi everyone!

So here's my problem...

I have 6 netbooks with Ubuntu 10.04 and ROS c-turtle. When I first installed everything I did so on the first netbook and cloned the image to the other 5.

Now I want to update ROS to diamondback, I could do the update one by one, but I'm guessing there is a faster way! What options do I have to update/install ROS and manage the robot's ROS stacks without having to work on the netbooks one by one?

Thanks for the help in advance,

Gonçalo Cabrita

Accepted Answer

answered 2011-06-02 05:43:06 -0500

ben
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You can turn on all of your machines and have them connected to the network. Then you can use Cluster SSH to ssh into all of them at once from some master computer and update all of them at once. It will take the same amount of time required to update one machine, to update all of them.

If your 'master' computer is running Ubuntu, you can install cssh by running:

sudo apt-get install clusterssh

Answer 2

1

answered 2011-06-02 04:48:10 -0500

JonW

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If you know the commands that you ned to run to upgrade to diamondback, you could bundle them together in a shell script and then either copy and run on each machine individually or use SSH to execute the commands remotely.

How much time and effort you spend on setting this up now does depend on how often you expect to be doing this in future. How elaborate is your ROS installation?

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Right now I'm just interested in erasing c-turtle and installing diamondback plus a couple of extra stacks. Although it would be interesting to be able to simultaneously install stacks on all robots at the same time. Gonçalo Cabrita ( 2011-06-02 05:53:59 -0500 )edit

You don't need to uninstall the old install unless you need the space. Simply updating the line "source /opt/ros/cturtle/setup.bash" to diamondback in .bashrc should be sufficient to force your system to use the newer release. There are neat way to do this, but a straight file copy should work. JonW ( 2011-06-02 17:04:33 -0500 )edit

We are using Eee PCs with tiny HDs so space is scarce! Thanks for the tip nonetheless! Gonçalo Cabrita ( 2011-06-04 12:59:57 -0500 )edit

How to update multiple ROS machines simultaneously?

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