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How do I tell the ros2 daemon to log to stdout?

asked 2021-04-15 14:54:48 -0500

rubicks gravatar image

How do I tell the ros2 daemon to log to stdout?

I know about ROS_LOG_DIR(https://wiki.ros.org/ROS/EnvironmentV...), but that doesn't help. If there were a ROS_LOG_FILE, then I would have tried setting it to /dev/stdout.

Here's an Amazon person talking about it (https://discourse.ros.org/t/ros2-logg...), but that conversation seems more like a wishlist than a spec.

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answered 2021-04-16 02:54:28 -0500

gvdhoorn gravatar image

updated 2021-04-16 03:03:50 -0500

How do I tell the ros2 daemon to log to stdout?

I know about ROS_LOG_DIR(https://wiki.ros.org/ROS/EnvironmentV...), but that doesn't help. If there were a ROS_LOG_FILE, then I would have tried setting it to /dev/stdout.

the ROS 2 daemon is for .. ROS 2.

The wiki you refer to documents ROS 1 environment variables. That won't help with configuring the daemon.

Afaik the only way to get it to output anything is to enable debug mode using the --debug option (otherwise all output streams are set to /dev/null):

$ ros2 daemon start --help
usage: ros2 daemon start [-h] [--debug]

Start the daemon if it isn't running

optional arguments:
  -h, --help   show this help message and exit
  --debug, -d  Print debug messages

it'll still detach though, so I'm not sure where messages following the ones printed during initialisation go.

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Probably related: #q373411.

gvdhoorn gravatar image gvdhoorn  ( 2021-06-09 04:08:00 -0500 )edit

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Asked: 2021-04-15 14:54:48 -0500

Seen: 63 times

Last updated: Apr 16