micro-ROS / micro-ROS/micro-ROS-demos

No access to uROS topics in another terminal

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Dominant language
C
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Description

## Issue template

- Hardware description: Windows 11, Docker inside VS Code with ROS2
- OS: Linux
- Installation type: Installed though [first_application_linux](https://micro.ros.org/docs/tutorials/core/first_application_linux/)
- Version or commit hash: humble

#### Steps to reproduce the issue

I followed the [tutorial](https://docs.ros.org/en/humble/How-To-Guides/Setup-ROS-2-with-VSCode-and-Docker-Container.html) with modified files to make in work on Windows 11.
VS Code configuration:
Dockerfile
```
FROM osrf/ros:humble-desktop
ARG USERNAME=Jakub
ARG USER_UID=1000
ARG USER_GID=$USER_UID

# Create the user
RUN groupadd --gid $USER_GID $USERNAME \
&& useradd --uid $USER_UID --gid $USER_GID -m $USERNAME \
#
# [Optional] Add sudo support. Omit if you don't need to install software after connecting.
&& apt-get update \
&& apt-get install -y sudo \
&& echo $USERNAME ALL=\(root\) NOPASSWD:ALL > /etc/sudoers.d/$USERNAME \
&& chmod 0440 /etc/sudoers.d/$USERNAME
RUN apt-get update && apt-get upgrade -y
RUN apt-get install -y python3-pip
ENV SHELL /bin/bash

# ********************************************************
# * Anything else you want to do like clean up goes here *
# ********************************************************

# [Optional] Set the default user. Omit if you want to keep the default as root.
USER $USERNAME
CMD ["/bin/bash"]
```
devcontainer.json
```
{
"name": "ROS 2 Development Container",
"privileged": true,
"remoteUser": "Jakub",
"build": {
"dockerfile": "Dockerfile",
"args": {
"USERNAME": "Jakub"
}
},
"workspaceFolder": "/home/ws",
"workspaceMount": "source=${localWorkspaceFolder},target=/home/ws/src,type=bind",
"customizations": {
"vscode": {
"extensions":[
"ms-vscode.cpptools",
"ms-vscode.cpptools-themes",
"twxs.cmake",
"donjayamanne.python-extension-pack",
"eamodio.gitlens",
"ms-iot.vscode-ros"
]
}
},
"containerEnv": {
"ROS_LOCALHOST_ONLY": "1",
"ROS_DOMAIN_ID": "42"
},
"remoteEnv": {
"DISPLAY": "host.docker.internal:0"
},
"runArgs": [
"-e", "DISPLAY=${env:DISPLAY}",
"--gpus=all"
],
"mounts": [
"source=${localWorkspaceFolder}/../cache/ROS_DISTRO/build,target=/home/ws/build,type=bind",
"source=${localWorkspaceFolder}/../cache/ROS_DISTRO/install,target=/home/ws/install,type=bind",
"source=${localWorkspaceFolder}/../cache/ROS_DISTRO/log,target=/home/ws/log,type=bind"
],
"postCreateCommand": "sudo rosdep update && sudo rosdep install --from-paths src --ignore-src -y && sudo chown -R Jakub /home/ws/"
}
```

Then inside the docker I followed the [tutorial](https://micro.ros.org/docs/tutorials/core/first_application_linux/). I try to run:
First terminal:
```
source /opt/ros/$ROS_DISTRO/setup.bash
source install/local_setup.bash
ros2 run micro_ros_agent micro_ros_agent udp4 --port 8888
```
Second terminal:
```
source /opt/ros/$ROS_DISTRO/setup.bash
source install/local_setup.bash

# Use RMW Micro XRCE-DDS implementation
export RMW_IMPLEMENTATION=rmw_microxrcedds

# Run a micro-ROS node
ros2 run micro_ros_demos_rclc ping_pong
```
Third terminal:
```
source /opt/ros/$ROS_DISTRO/setup.bash
source install/local_setup.bash
ros2 topic list
```
#### Expected behavior
In the third topic I should be able to see topic named `/microROS/pong`.
#### Actual behavior
There are only two topics:
```
/parameter_events
/rosout
```
#### Additional information
When I try to run `rviz2` its working correctly, I am able to see topics in every terminal.

Contributor guide

Open the contributing guide

Research direction

Start with the Dockerfile and devcontainer.json, then reproduce the three-terminal setup from the linked first_application_linux tutorial. Compare the ROS_LOCALHOST_ONLY and ROS_DOMAIN_ID settings with the agent and ping_pong commands, and verify the result with ros2 topic list. Done means /microROS/pong is visible from the third terminal.

Written by the indexing model from the issue text.

Assessment

Tech stack
c, docker, linux
Domain
devops, distributed-systems, networking, robotics
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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