CODEWITHSUNDEEP
wordpressdockeramazon-elastic-beanstalk
nswart
nswart

Reputation: 173

How do I change file permissions on ElasticBeanstalk before docker image gets built?

I am deploying a Docker image (Wordpress) on Elastic Beanstalk using a single container deployment.

My deployment zip file includes:

The standard Wordpress image creates a volume VOLUME /var/www/html and in my Dockerfile I do

COPY ./public /var/www/html

Now the problem is that I cannot upload media using Wordpress admin dashboard.

Unable to create directory wp-content/uploads/2019/02. Is its parent directory writable by the server?

I've tried to change the permissions on the uploads folder using the EB config in .ebextensions/permissions.config 

container_commands:
  91writable_dirs:
    command: | 
        chmod -R 777 /var/app/current/public/wp-content/uploads
    cwd: "/var/app/current"

I see from the logs that the docker image gets built before running chmod. I've seen on other SO posts that some run the script on /var/app/ondeck/, but that fails with the directory doesn't exist

Despite all the above, my question is actually how do I get to upload media to Wordpress with my current setup.

EDIT: When I attach a shell to the docker container and change the file permissions of wp-content/uploads in the VOLUME /var/www/html I am able to upload media. So how can this be made permanent on the VOLUME?

Upvotes: 1

Views: 560

Answers (1)

Pranav G.
Pranav G.

Reputation: 71

Whenever wordpress docker image is built and run, the docker ENTRYPOINT of the wordpress image is executed first. Hence your command to change the directory permissions is not getting executed.

This ENTRYPOINT is a bash script located in /usr/local/bin/docker-entrypoint.sh

If you want your command to be executed, you could add your command to this script and it will be called every time your container starts.

You could do it the following way -

  • Start your container and copy the contents of the existing docker-entrypoint.sh

  • Create a new docker-entrypoint.sh outside the container and edit
    that script to add your chmod command at appropriate location.

  • In your Dockerfile add a line to copy this new entrypoint to the
    location /usr/local/bin/docker-entrypoint.sh

Upvotes: 1

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