How to set up Docker for Symfony project with MySQL? - mysql

Question

How to set up a new Symfony project with MySQL database using Docker?
I've been trying to set up a new project using Docker for over a week now. I've read trough Docker documentation, found a few tutorials, but nothing really worked for me. And I'm just not able to crack how Docker set up works. Last time I tried I just got a RuntimeException and an ErrorException errors
Project Structure:
-myProject
-bin
-...
-config
-...
-docker
-build
-php
-Dockerfile
-php
-public
-index.php
-src
-...
-var
-...
-vendor
-...
-docker-compose.yaml
-...
My docker-compose.yaml:
version: '3.7'
services:
php:
build:
context: .
dockerfile: docker/build/php/Dockerfile
ports:
- "8100:80"
# Configure the database
mysql:
image: mysql:5.7
environment:
- MYSQL_ROOT_PASSWORD=${MYSQL_ROOT_PASSWORD:-root}
My Dockerfile:
FROM php:7.3-apache
COPY . /var/www/html/
I expected to have "Welcome to Symfony" page but I got an error page.
Errors:
ErrorException
Warning: file_put_contents(/var/www/html/var/cache/dev/srcApp_KernelDevDebugContainerDeprecations.log): failed to open stream: Permission denied
AND
RuntimeException
Unable to write in the cache directory (/var/www/html/var/cache/dev)
What I need is some help to set up my Symfony 4 project with MySQL using Docker

Answer 1

OK so to make it work I just needed to give permision to var folder using chmod in Dockerfile
FROM php:7.3.2-apache
COPY . /var/www/html/
RUN chmod -R 777 /var/www/html/ /var/www/html/
Found this answer in the comments, but the person that left it removed the comment

Answer 2

You actualy have no need to chmod your project root folder to something unnecessary open, like 0777.
In php:* containers php workers run from www-data user. So all you need to do is chown your current project root dir to www-data and verify that www-data user can actualy create folders in it (ls -lah will help you).
Here is my php stage from symfony 4.3 projects:
FROM php:7.3-fpm as runtime
# install php ext/libraries and do other stuff.
WORKDIR /var/www/app
RUN chown -R www-data:www-data /var/www/app
COPY --chown=www-data:www-data --from=composer /app/vendor vendor
COPY --chown=www-data:www-data bin bin
COPY --chown=www-data:www-data config config
COPY --chown=www-data:www-data public public
COPY --chown=www-data:www-data src src
COPY --chown=www-data:www-data .env .env