docker_examine_container

Examine your container

You may need to interact with your container to troubleshoot or simply verify that it is working as you expect. One way to do this is to run with the default entrypoint and then open an interactive terminal.

First, run the following to start your container:

docker run --name my_container <USERNAME>/<IMAGE_REPOSITORY_NAME>:<TAG>

Then in a different terminal, run:

docker exec -it my_container bash

This allows you to enter the running container and investigate. For example:

source /opt/ros/melodic/setup.bash
rostopic list

/vorc/thrusters/left_thrust_cmd
/vorc/thrusters/right_thrust_cmd
/rosout
/rosout_agg

rostopic echo /vorc/thrusters/left_thrust_cmd

data: 2.0
---
data: 2.0
---

Finally, you can exit with

exit

To kill the container from outside the container, run:

docker kill my_container