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Setting logging directory per Node in Foxy

asked 2021-05-17 07:44:44 -0500

Hi, is there a way to set up my logger, so that it outputs log files into different directories?

For example, let's say I have a my_node node, and I would like for it to log it's contents to ./ros/logs/my_node/ like

auto logger = rclcpp::get_logger("my_node");
logger.set_logging_directory(path_to_logging_dir/my_node) // (i know this doesn't exist right now, it's just an example)

is there a way to access the logging internals to do that?

I know that spdlog library has basic_file_sink ROS2 uses spdlog underneath, so maybe there is an access to it?

I've seen

https://answers.ros.org/question/3577... but this is per launch file, and I want to separate on my node level, via rclcpp. I have also seen

https://docs.ros.org/en/foxy/Tutorial..., but here the default variables only respond to the main ros directory.

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Or is the encapsulation by launch file the correct way to do things?

Serafadam gravatar image Serafadam  ( 2021-05-17 07:48:50 -0500 )edit

I see an API for getting the log directory, but I don't see one for setting it. https://github.com/ros2/rcl_logging/b...

Maybe there's a way to set the directory in the file rcl_logging_external_initialize()? Even then I think logging affects the whole process, so if an API was added to rclcpp it may affect all nodes in the process.

sloretz gravatar image sloretz  ( 2021-05-17 13:02:52 -0500 )edit

You could try splitting your nodes into individual launch files, and then make a "master" launch file that references the others. Is this something feasible for you to try?

Spectre gravatar image Spectre  ( 2021-05-17 13:14:04 -0500 )edit

After some thinking, I think doing this via launch file seems the cleanest solution for this case.

Serafadam gravatar image Serafadam  ( 2021-05-18 08:48:47 -0500 )edit

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answered 2021-05-31 13:20:23 -0500

Spectre gravatar image

It's a bit late, but it looks like this feature has been implemented in the latest ROS2 release, Galactic Geochelone!

Check it out here: ROS2 Galactic, Updates to ROS2, "Ability to Specify Per-Logger Log Levels"

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I'm afraid logging levels don't have much to do in this case

Serafadam gravatar image Serafadam  ( 2021-06-01 03:51:38 -0500 )edit

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Asked: 2021-05-17 07:44:44 -0500

Seen: 112 times

Last updated: May 31 '21