Everything else takes effect but permissions are not changing, am I missing something?
FROM joomla:3.9-php7.2-apache RUN apt-get update \ && apt-get install -y apt-utils vim curl COPY ./joomla_html /var/www/html RUN chmod -R 765 /var/www/html/ RUN chown -R www-data. /var/www/html/ RUN chmod -R 777 /var/www/html/tmp RUN chmod -R 777 /tmp RUN chmod -R 777 /var/www/html/modules RUN chmod -R 777 /var/www/html/components RUN chmod -R 777 /var/www/html/administrator/logs RUN chmod -R 777 /var/www/html/images RUN chmod -R 777 /var/www/html/uploads COPY ./docker/php.ini /usr/local/etc/php/conf.d/php-extras.ini EXPOSE 80 This is what I get, every file has permissions to 1000:1000, I need it to be to www-data
Output of ls -la /var/www/html is
total 144 drwxr-xr-x 19 1000 1000 4096 May 8 18:53 . drwxr-xr-x 1 root root 4096 May 8 02:30 .. drwxr-xr-x 25 1000 1000 4096 May 8 18:53 components drwxr-xr-x 6 1000 1000 4096 May 8 18:53 images drwxr-xr-x 68 1000 1000 4096 May 8 18:53 modules drwxr-xr-x 2 1000 1000 4096 May 8 18:53 tmp drwxr-xr-x 2 1000 1000 4096 May 8 18:53 uploads 2 Answers
The directory is defined as a volume upstream:
VOLUME /var/www/html Volumes cannot be modified with a RUN command. They start in a temporary container that has the volume, and only the changes to the container, not the volume are saved.
You can try asking the upstream repo to change their image to remove the volume definition from the Dockerfile. Or you can pull their repo and build your own version of the base image without the volume. Neither of these will prevent you from running the container later with a volume in that directory.
Otherwise, if you want to extend the image and make changes with RUN commands, you'll need to save your files in another directory. You could also have an entrypoint that copies those files to /var/www/html on container start.
You could also consider a multi stage build, fixing the permissions in the first stage, and then copying the files directly into the volume in the release stage. As you've noticed, COPY still works with volumes. It isn't implement with a temporary container and therefore can place files directly in the image filesystem.
You should set the owner directly when you copy the files:
FROM joomla:3.9-php7.2-apache RUN apt-get update \ && apt-get install -y apt-utils vim curl COPY --chown=www-data:www-data ./joomla_html /var/www/html RUN chmod -R 765 /var/www/html/ COPY ./docker/php.ini /usr/local/etc/php/conf.d/php-extras.ini EXPOSE 80 
