Dockerfile – CMD does not run the shell script
Ok just learning about creating a Dockerfile and my understanding (which is probably wrong) is that the
CMD command should be able to run a shell script from within the container once it is placed there.
I am just trying it out with a vanilla apache2 install
FROM ubuntu:latest ADD install-apache.sh /Scripts/install-apache.sh RUN chmod +x /Scripts/install-apache.sh CMD [/Scripts/install-apache.sh] RUN echo "Hope this worked!"
I have also tried this:
When I use the
RUN command it works (without the [ and ])
So I am a bit lost what the
CMD is suppose to do.
I followed the instructions from http://kimh.github.io
and read through the docker docs as well.
How am I using the
CMD wrong and how should I use it in this scenario?
One Solution collect form web for “Dockerfile – CMD does not run the shell script”
RUNis executed while you are building an image. This is usually used to install things or perform modifications in the resulting image.
CMDis executed when the container is started. Use this to e.g. start applications.
Also check the docs
The main purpose of a CMD is to provide defaults for an executing
container. These defaults can include an executable, or they can omit
the executable, in which case you must specify an ENTRYPOINT
instruction as well.