Copying plugin folder to WordPress default image directory and creating a new image. Pushing it to the repository on Docker Hub, then pull back image and run the container, but the plugin is not installed. Folder is not found in the container.
docker-compose.yml
version: '3.3'
services:
wp:
image: "arslanliaqat/wordpresswithplugin:1.0"
volumes:
- './wordpress:/var/www/html'
ports:
- "8000:80"
environment:
WORDPRESS_DB_PASSWORD: qwerty
mysql:
image: "mysql:5.7"
environment:
MYSQL_ROOT_PASSWORD: qwerty
volumes:
- "my-datavolume:/var/lib/mysql"
volumes:
my-datavolume:
Dockerfile
FROM wordpress:php7.1-apache
COPY preferred-languages /var/www/html/wp-content/plugins/preferred-languages/
could not pre-install plugin
So this is what's happening:
When you are building your custom image, you add the plugin folder /var/www/html/wp-content/plugins/preferred-languages/ and that works just fine.
You can test that by simply running docker run -it --rm arslanliaqat/wordpresswithplugin sh and cd /var/www/html/wp-content/plugins and you should see the folder.
The reason the folder is missing when you are using your docker-compose.yml file is because you are mounting the volume "over" the folder that's already there. Try removing the volumes declaration from wp service in the docker-compose.yml file and then you should be able to see your plugin folder.
I would suggest you use the wordpress:php7.1-apache for your wp service and mount your plugin folder the same way you are mounting wordpress
Example:
version: '3.3'
services:
wp:
image: "wordpress:php7.1-apache"
volumes:
- './wordpress:/var/www/html'
- './preferred-languages:/var/www/html/wp-content/plugins/preferred-languages'
ports:
- "8000:80"
environment:
WORDPRESS_DB_PASSWORD: qwerty
mysql:
image: "mysql:5.7"
environment:
MYSQL_ROOT_PASSWORD: qwerty
volumes:
- "my-datavolume:/var/lib/mysql"
volumes:
my-datavolume:
Is there a specific reason you need the plugin to be in the image already?
UPDATED
I created a simple gist which should accomplish what you want to do. The entrypoint lacks checks for already existing theme/plugin directories etc, but this should serve as POC
https://gist.github.com/karlisabe/16c0ccc52bdf34bee5f201ac7a0c45f7