Let us take a closer look at the error Docker entrypoint file permission denied. With the support of our Docker hosting support services, we can help you remove the error easily.

File Permission denied Error Docker

This Error does not allow us to call the script. Thus, the only syntax that may be vital is that of the first line, which should look like, #!/usr/bin/env bash or #!/bin/bash, or anything similar on the basis of the system of the file structure of the target.

Troubleshoots for Docker Entrypoint file permission denied

• Before we can run any file, we must first grant it running permissions. Try running on the system where we are producing the docker image (not within the docker image itself):

  ls -la path/to/directory

  The executable bits should be set in the first column of the output for the executable (in this instance docker-entrypoint.sh) as follows:

  -rwxrwxr-x

  If not then we can also try the following:

  chmod +x docker-entrypoint.sh

  After that, rebuild the Docker image. Docker has its own file system, but it will copy everything from the source folders.
• We can also resolve the Docker entrypoint file permission denied error by:

  ENTRYPOINT ["sh", "/docker-entrypoint.sh"]

  In the original query, the Dockerfile should look like this:

  ENTRYPOINT ["sh", "/usr/src/app/docker-entrypoint.sh"]
• Give the file docker-entrypoint.sh execution permissions.

  sudo chmod 775 docker-entrypoint.sh

  We require executable permission on the entrypoint.sh file in this case. Alternatively, we need to set up permissions on the host using the chmod command. Like:

  chmod +x entrypoint.sh

  After that, we have to rebuild it. Type in the following code line to rebuild it:

  docker build -t alpine-apache

  Run it after the process:

  docker run --name www_app -d -p 443:443 alpine-apache:latest

  The entrypoint file permission denied error should clear now.
• We can run the following line:

  docker-compose build --no-cache.

  After fixing the rights on entrypoint.sh, the issue will resolve automatically.
• If we do not want to utilize DockerFile, we may just add permission as a command line input to bash:

  docker run -t /bin/bash -c "chmod +x /usr/src/app/docker-entrypoint.sh; /usr/src/app/docker-entrypoint.sh"

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Docker Hosting support services Conclusion

To sum up we have now gone through the troubleshooting steps for the docker entrypoint file permission denied error. Get in touch with our Docker Hosting support services for more.