docker-entrypoint.sh Permissions

[joaolucaswork]

Problem with docker-entrypoint.sh Permissions

Problem Description

While building a custom Docker image based on n8n, we encountered a permission error when trying to make the docker-entrypoint.sh file executable.

The specific error was:

ERROR: failed to solve: process "/bin/sh -c chmod +x /docker-entrypoint.sh" did not complete successfully: exit code: 1

The detailed error message indicated:

chmod: /docker-entrypoint.sh: Operation not permitted

This error occurred during the Docker image build process, specifically at the step where we attempted to modify the permissions of the docker-entrypoint.sh file.

Root Cause

The issue appears to be related to insufficient permissions within the container during the build process. This could be due to several reasons:

1. The docker-entrypoint.sh file may have been copied into the container with restricted permissions.
2. The user inside the container may not have sufficient permissions to modify the file.
3. Possible additional security restrictions (such as SELinux or AppArmor) may be interfering.

Solution

The solution that resolved the issue was to add the following line to the Dockerfile:

RUN chown root:root /docker-entrypoint.sh && chmod +x /docker-entrypoint.sh