Docker run does not find ENTRYPOINT

Question

I have the following Dockerfile:

FROM ubuntu:19.10
WORKDIR /gen
COPY script.sh ./

RUN chmod +x script.sh && export PATH="/gen/:$PATH"

ENTRYPOINT [ "script.sh" ]

It builds fine, but I cannot execute it. The solution from post is to add the full path to the script (ENTRYPOINT [ "/gen/script.sh" ]), which does not work.

Adding the folder to PATH also does not work. Why is that?

Error: docker: Error response from daemon: OCI runtime create failed: container_linux.go:349: starting container process caused "exec: \"script.sh\": executable file not found in $PATH": unknown.

EDIT: The problem comes from me calling the container with docker run --rm -v some/dir:/gen containerName.

I think the problem hast to do with a volume that I am mounting to `/gen`. Could that be the problem @ArkadiuszDrabczyk — User12547645, Mar 25 '20 at 19:13
It shouldn't be, `docker run --rm -it -v $PWD:/gen container` works for me with `ENTRYPOINT [ "/gen/script.sh" ]` as well. — Arkadiusz Drabczyk, Mar 25 '20 at 19:24
What is in `script.sh`? Is that file in your mounted volume? Are you editing the file on windows (check the linefeed type)? — BMitch, Mar 25 '20 at 19:52

score 2 · Accepted Answer · answered Mar 25 '20 at 20:15

2

The problem is that you did not modify your PATH variable. Using export in a RUN statement will not be persistent. You need to set environment variables with ENV.

FROM ubuntu:19.10
WORKDIR /gen
COPY script.sh ./

RUN chmod +x script.sh
ENV PATH="/gen:$PATH"

ENTRYPOINT ["script.sh"]

If you run the Docker image while mounting a volume to /gen, you will overwrite the /gen directory and your script will not be found.

answered Mar 25 '20 at 20:15

jkr

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Thank you very much. The last sentence was the answer I was looking for – User12547645 Mar 26 '20 at 09:51
That's great. Because this answered your question, can you please select the green check to mark it as the answer? – jkr Mar 26 '20 at 13:24

Docker run does not find ENTRYPOINT

1 Answers1