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There are some nodes work together ,I want to monitor all nodes . Avoid one or some of these nodes are broken or died,how to write a script or something to reach this goal ? Does ros have any mechanisms or solutions？
Then you need to use a bond, which allows processes, to know when the others have terminated, either cleanly or by crashing.
the official doc is here: http://wiki.ros.org/bond
If your nodes themselves do not need to know about the status of other nodes, but you just want to make sure that if one node dies then the whole system stops, then roslaunch will do what you want. For each node in your launch file, set the required attribute (see http://wiki.ros.org/roslaunch/XML/nod... ) to true. Then, if any of your nodes die, roslaunch will kill all the others and stop your system.
Not sure if this is exactly what you are after but you could try using a watchdog (http://wiki.ros.org/watchdog_timer).
Asked: 2017-04-19 02:29:51 -0600
Seen: 1,573 times
Last updated: Apr 20 '17
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