PlaybackNetworkShare.txt

Simple example: How to run two docker containers that will share a network connection for Ros.

1. Create the local network from docker

  docker network create localros
  
2. Start up your docker container, with the name set for easy reuse later

  docker run -it --rm --net localros --name master rosblank roscore

3. start up the other container, which should have access to the ros master effectively

  docker run -it --rm --net localros --name test1 --env ROS_HOSTNAME=test1 --env ROS_MASTER_URI=http://master:11311 rosblank /bin/bash

Note: this used the below Dockerfile, creating an image called "rosblank"

```
FROM ros:noetic-robot

# change the default shell command
SHELL ["/bin/bash", "-c"] 


#ENV TERM linux
ENV TERM xterm-256color
ENV DEBIAN_FRONTEND noninteractive

RUN apt-get update 
RUN apt-get install -y wget
#RUN apt-get install -y curl nano iputils-ping net-tools git cmake build-essential

#RUN apt-get update
#RUN apt-get install -y ros-noetic-tf2 ros-noetic-tf ros-noetic-geodesy python3-catkin-pkg
#
#
#RUN mkdir -p home/catkin_ws/src
#RUN cd home/catkin_ws/src/ && git clone https://github.com/jmscslgroup/ros2ascii
#RUN /bin/bash -c '. /opt/ros/noetic/setup.bash; cd home/catkin_ws; catkin_make'
#
##RUN "source /home/catkin_ws/devel/setup.bash"
#RUN echo "source /home/catkin_ws/devel/setup.bash" >> /root/.bashrc

# this gets run in this image
RUN source ros_entrypoint.sh

# now add this to all future calls
RUN echo "source /ros_entrypoint.sh" >> /etc/bash.bashrc

CMD ["/bin/bash"]
# RUN export ROS_MASTER_URI="http://$(hostname):11311"
# RUN export ROS_HOSTNAME="$(hostname)"

#ADD start.sh /
#RUN chmod u+x start.sh
#CMD ["/start.sh"]

```