Welcome, fellow developers! Today, we’re going to tackle a common issue that occurs when using Docker-Compose with Postgres: getting a “Permission denied” error with the /docker-entrypoint-initdb.d/init.sql file. This problem can be frustrating, but fear not! We’re here to provide you with practical solutions that will have you up and running in no time. So, let’s dive in and explore the issue together!
Table of Contents
- Understanding the Issue
- Exploring Solutions
- Using the “Build” Method
- Disabling SELinux Access Control
- Managing File Permissions with COPY Command
- Final Thoughts
Understanding the Issue
When using Docker-Compose and Postgres, you might encounter an error that looks something like this:
bash
/usr/local/bin/docker-entrypoint.sh: running /docker-entrypoint-initdb.d/init.sql
/docker-entrypoint-initdb.d/init.sql: Permission denied
This error usually occurs due to improper file permissions or other configuration issues. In this article, we’ll look at several ways to resolve the problem.
Exploring Solutions
Using the “Build” Method
One way to solve the issue is by using the “build” method for creating the Postgres service in your Docker-Compose file. Here’s what you need to do:
- Avoid setting the volume for init.sql, as this can cause permission problems.
- Instead, create a separate Dockerfile for Postgres and use the following configuration:
Dockerfile
FROM postgres:12
COPY ./init.sql /docker-entrypoint-initdb.d/init.sql
CMD ["docker-entrypoint.sh", "postgres"]
With this configuration, your permission issues should be resolved, and your Postgres service should work correctly.
Disabling SELinux Access Control
Another possible solution is to disable SELinux access control on your machine. This can be done by following these steps:
bash
echo SELINUX=disabled > /etc/selinux/config
SELINUXTYPE=targeted >> /etc/selinux/config
setenforce 0
Keep in mind that disabling SELinux might not be the best practice for all scenarios, as it could impact your system’s security. Only consider this option if you’re confident about the potential consequences.
Managing File Permissions with COPY Command
When using the COPY command in your Dockerfile, ensure that the file permissions match those on your host machine. This can help prevent permission issues when running the init.sql file. In the upcoming Docker 20, there will be a “COPY –chmod 775” flag available, making this process even easier.</p> <p>You can test the file permissions within your Docker image by overriding the entrypoint to /bin/bash and running:
bash
docker-entrypoint.sh postgres
Once the file permissions are correctly set, the init.sql file should run without any issues.
Final Thoughts
And there you have it! In this article, we’ve discussed various solutions to the “Permission denied” error when using Docker-Compose with Postgres. We hope that these tips and tricks have helped you overcome the issue and get your project up and running smoothly.
