Dockerfile - 将 bash 文件从主机复制到 Dockerfile

Question

I'm trying to copy a bash file called setup_envs.sh which is in the same directory of my Dockerfile.

How can I run this bash file only once after Dockerfile is created?

My code is (in the end of the Dockerfile):

RUN mkdir -p /scripts
COPY setup_env.sh /scripts
WORKDIR /scripts
RUN chmod +x /scripts/setup_env.sh
CMD [./scripts/setup_env.sh]

Current error: /bin/bash: [./scripts/setup_env.sh]: No such file or directory

I don't have a type in the file btw, I checked this.

Moreover, after I solve this and run the image to create a container - how can I make sure this bash script is only called once? Should I just write a command in the bash script that checks if some folder exists - and if it does - don't install it?

Answer 1

Based on the different comments including mine, this is what your Dockerfile extract should be replaced with:

COPY --chmod 755 setup_env.sh /scripts/
WORKDIR /scripts
CMD /scripts/setup_env.sh

Alternatively you can use the exec form for CMD but there is not much added value here since you're not passing any command line parameters.

CMD ["/scripts/setup_env.sh"]

At this point, I'm not really sure the WORKDIR instruction is useful (it depends on the rest of your Dockerfile and the content of your script).

Regarding your single bash script execution, I think you need to give a bit more background on the exact goal you are targeting. I have the feeling you could be in an X/Y Problem . And since this is a totally different issue, it should go inside a new question anyway with all required details.