dominikn/fastdds-discovery-server-demo

Using Fast DDS Discovery Server with multiple hosts connected over the Internet with Husarnet VPN

fastdds-discovery-server-demo's Issues

ros2 topic list does not show /chatter on Docker Container (only shows /rosout and /parameter_events)

Hi,

I've been testing this, but I can see no topics with ros2 topic list.

If I run ros2 node list, I can see the talker and listener, but ros2 topic list, I can only see:

/parameter_events
/rosout

I cannot see the topics, but I can see the messages being sent and received by the talker and listener, based on the logs of the containers. In order to run the "ros2 topic list", I entered the containers with "docker exec".

I see the Dockerfile uses donowak/ros:galactic-ros-core as the base, which is ROS Galactic. I then modified it to use osrf/ros:humble-desktop-full as the base but I still have the same problem.

I don't know if this matters, but I have tested/run all nodes (talker, listener, and dds-discovery-server) on the same computer.

So my questions are:

• Does this problem happen only to me?
• Does anybody know why this happens and how to solve it?
• If someone says it may be related to QoS (Quality of Service), since all nodes run in the same computer, I'm not sure this QoS settings would affect anything