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What computers are participating in ROS right now?

kinetic

asked 2018-07-27 08:27:42 -0500

pitosalas
628 ●116 ●149 ●169

Having gotten through a particularly annoying troubleshooting session, I think there must be a tool that would have helped me. Along the lines of rosnode and rostopic, I would like to see a listing of what the computers are that are participating, e.g.

computer-a (ip 12.1.2.3, ubuntu 16.04)
  Node one
     Topic X (published)
     Topic Y (published)
 - Node two
     Topic H (subscribed)
compute-b  (ip 12.1.2.4, ubuntu 16.04)
  - Node three
      Topic X (subscribed)

Note specifically the mention of distinct "computers" so that one could tell that topic Y had no subscribers. I am not sure to be honest whether this would have smoked out by config problem but it would seem that something more would have been useful.

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answered 2018-07-27 08:52:40 -0500

gvdhoorn
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I believe you're looking for this:

rostopic list --host

Adding -v gives you something like:

Host [some_hostname]:

  Published topics:
   * /rosout_agg [rosgraph_msgs/Log] 1 publisher

  Subscribed topics:
   * /rosout [rosgraph_msgs/Log] 1 subscriber

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Note btw that this is technically not an actual answer to your question: rostopic list will only show the topics registered with a master (and the hostnames/nodes). There can be multiple masters, so this is not an exhaustive list.

"participating in ROS" is also an ambiguous question.

gvdhoorn ( 2018-07-27 08:55:06 -0500 )edit

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Asked: 2018-07-27 08:27:42 -0500

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Last updated: Jul 27 '18

What computers are participating in ROS right now? edit

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What computers are participating in ROS right now?