Dockerfile is not running the desired shell script - docker

Question

I am trying configure and run a certain program using Docker. I am a beginner in Docker, so beware of newbie mistakes!
FROM ubuntu:16.04
# create non-root user
ENV USERNAME ros
RUN adduser --ingroup sudo --disabled-password --gecos "" --shell /bin/bash --home /home/$USERNAME $USERNAME
RUN bash -c 'echo $USERNAME:ros | chpasswd'
ENV HOME /home/$USERNAME
RUN apt-get update && apt-get install --assume-yes wget sudo && \
wget https://raw.githubusercontent.com/ROBOTIS-GIT/robotis_tools/master/install_ros_kinetic.sh && \
chmod 755 ./install_ros_kinetic.sh && \
bash ./install_ros_kinetic.sh
RUN apt-get install --assume-yes ros-kinetic-joy ros-kinetic-teleop-twist-joy ros-kinetic-teleop-twist-keyboard ros-kinetic-laser-proc ros-kinetic-rgbd-launch ros-kinetic-depthimage-to-laserscan ros-kinetic-rosserial-arduino ros-kinetic-rosserial-python ros-kinetic-rosserial-server ros-kinetic-rosserial-client ros-kinetic-rosserial-msgs ros-kinetic-amcl ros-kinetic-map-server ros-kinetic-move-base ros-kinetic-urdf ros-kinetic-xacro ros-kinetic-compressed-image-transport ros-kinetic-rqt-image-view ros-kinetic-gmapping ros-kinetic-navigation ros-kinetic-interactive-markers
RUN cd /home/$USERNAME/catkin_ws/src/
RUN git clone https://github.com/ROBOTIS-GIT/turtlebot3_msgs.git
RUN git clone https://github.com/ROBOTIS-GIT/turtlebot3.git
USER $USERNAME
WORKDIR /home/$USERNAME
# add catkin env
RUN echo 'source /opt/ros/kinetic/setup.bash' >> /home/$USERNAME/.bashrc
RUN echo 'source /home/$USERNAME/catkin_ws/devel/setup.bash' >> /home/$USERNAME/.bashrc
RUN /bin/bash -c "source /home/ros/.bashrc && cd /home/$USERNAME/catkin_ws && catkin_make"
Gave the following output:
~/m/rosdocker docker build --rm -f "Dockerfile" -t rosdocker:latest .
Sending build context to Docker daemon 5.632kB
Step 1/15 : FROM ubuntu:16.04
---> b0ef3016420a
Step 2/15 : ENV USERNAME ros
---> Using cache
---> 25bf14574e2b
Step 3/15 : RUN adduser --ingroup sudo --disabled-password --gecos "" --shell /bin/bash --home /home/$USERNAME $USERNAME
---> Using cache
---> 3a2787196745
Step 4/15 : RUN bash -c 'echo $USERNAME:ros | chpasswd'
---> Using cache
---> fa4bc1d220a8
Step 5/15 : ENV HOME /home/$USERNAME
---> Using cache
---> f987768fa3b1
Step 6/15 : RUN apt-get update && apt-get install --assume-yes wget sudo && wget https://raw.githubusercontent.com/ROBOTIS-GIT/robotis_tools/master/install_ros_kinetic.sh && chmod 755 ./install_ros_kinetic.sh && bash ./install_ros_kinetic.sh
---> Using cache
---> 9c26b8318f2e
Step 7/15 : RUN apt-get install --assume-yes ros-kinetic-joy ros-kinetic-teleop-twist-joy ros-kinetic-teleop-twist-keyboard ros-kinetic-laser-proc ros-kinetic-rgbd-launch ros-kinetic-depthimage-to-laserscan ros-kinetic-rosserial-arduino ros-kinetic-rosserial-python ros-kinetic-rosserial-server ros-kinetic-rosserial-client ros-kinetic-rosserial-msgs ros-kinetic-amcl ros-kinetic-map-server ros-kinetic-move-base ros-kinetic-urdf ros-kinetic-xacro ros-kinetic-compressed-image-transport ros-kinetic-rqt-image-view ros-kinetic-gmapping ros-kinetic-navigation ros-kinetic-interactive-markers
---> Using cache
---> 4b4c0abace7f
Step 8/15 : RUN cd /home/$USERNAME/catkin_ws/src/
---> Using cache
---> fb87caedbef8
Step 9/15 : RUN git clone https://github.com/ROBOTIS-GIT/turtlebot3_msgs.git
---> Using cache
---> d2d7f198e018
Step 10/15 : RUN git clone https://github.com/ROBOTIS-GIT/turtlebot3.git
---> Using cache
---> 42ddcbbc19e1
Step 11/15 : USER $USERNAME
---> Using cache
---> 4526fd7b5d75
Step 12/15 : WORKDIR /home/$USERNAME
---> Using cache
---> 0543c327b994
Step 13/15 : RUN echo 'source /opt/ros/kinetic/setup.bash' >> /home/$USERNAME/.bashrc
---> Using cache
---> dff40263114a
Step 14/15 : RUN echo 'source /home/$USERNAME/catkin_ws/devel/setup.bash' >> /home/$USERNAME/.bashrc
---> Using cache
---> fff611e9d9db
Step 15/15 : RUN /bin/bash -c "source /home/ros/.bashrc && cd /home/$USERNAME/catkin_ws && catkin_make"
---> Running in 7f26a34419a3
/bin/bash: catkin_make: command not found
The command '/bin/sh -c /bin/bash -c "source /home/ros/.bashrc && cd /home/$USERNAME/catkin_ws && catkin_make"' returned a non-zero code: 127
~/m/rosdocker
I need it to run catkin_make (which is on the path set up by .bashrc)

Answer 1

Exit code 127 from shell commands means "command not found". Is .bashrc executable? Normally it is not, probably you want to source it?
source ./home/$USERNAME/.bashrc
As Dan Farrel pointed out in his comment, sourcing the file in a RUN command will only have effect within that shell.
To source .bashrc during the build
If you want it to have effect for later commands in the build you need to run them all in the same RUN statement. In the below .bashrcis sourced in the same shell as catkin_make is run.
RUN . /home/ros/.bashrc && \
cd /home/$USERNAME/catkin_ws && \
catkin_make
To source the .bashrc file when the container starts
What should happen when the container is run using docker runis specified using the ENTRYPOINTstatement. If you just want a plain bash prompt, specify /bin/bash. The shell will be run with the user specified in the USER statement.
So in summary if you add the following to the end of your Dockerfile
USER ros
ENTRYPOINT /bin/bash
When someone runs the container using docker run -it <containerName> they will land in a bash shell as the user ros. Bash will automatically source the /home/ros/.bashrc file and all definitions inside will be available in the shell. (Your RUN statement containing the .bashrc file canbe removed