如何修复 Docker sh 入口点中的“权限被拒绝”

Question

I'm trying to create an easy-to-use Docker image for the Garry's Mod server. While my Docker image builds just fine, running it as a container always results in a single error: /bin/sh: 1: ./easygmod.sh: Permission denied .

I'm using the cm2network/steamcmd image as a base. I have tried both tags that the aforementioned base image has. I have tried chmod +x , changing users to root , and fiddling with the shebang in the first line of the easygmod.sh script, as well as a number of possible typos, particularly in file names and paths.

I have a GitHub repository for this project which auto-builds to Docker Hub . Currently, the lines of code involving the problematic script are:

# Start main script
ADD easygmod.sh .
RUN chmod +x easygmod.sh
USER steam
CMD ./easygmod.sh

Also, the shebang/first line of the script is currently #!/bin/sh .

Despite having no logical explanation, the easygmod.sh script refuses to be executed, always throwing the error Permission denied . This especially confusing given that my only other public GitHub project , which is very similar (similar style Docker image with the same base OS as cm2network/steamcmd ), never had any issues like this.

Answer 1

The file isn't owned by steam in the container, so the chmod +x was insufficient. Either add --chown=steam to the ADD , or change your chmod from +x to a+rx .

Also, you didn't specify CWD or a path to put those files in. It's likely that the root version of that image has a CWD that steam can't access. You should use /home/steam/ for that instead.