Docker production ready php-fpm and nginx configuration - php

Question

I have a small theoretical problem with combination of php-fpm, nginx and app code in Docker.
I'm trying to stick to the model when docker image does only one thing -> I have separate containers for php-fpm and nginx.
php:
image: php:5-fpm-alpine
expose:
- 9000:9000
volumes:
- ./:/var/www/app
nginx:
image: nginx:alpine
ports:
- 3000:80
links:
- php
volumes:
- ./nginx/app.conf:/etc/nginx/conf.d/app.conf
- ./:/var/www/app
NOTE: In app.conf is root /var/www/app;
Example schema from Symfony
This is great in development, but I don't know how to convert this to production ready state. Mount app directory in production is really bad practice (if I'm not wrong). In best case I copy app source code into container and use this prebuilded code (COPY . /var/www/app in Dockerfile), but in this case is impossible or I don't know how.
I need share app source code between two contatiner (nginx container and php-fpm container) because booth of that need it.
Of course I can make own nginx and php-fpm container and add COPY . /var/www/app into both of them, but I thing that is wrong way because I duplicate code and the whole build process (install dependencies, build source code, etc...) must be in both (nginx/php-fpm) containers.
I try to search but I don't find any idea how to solve this problem. A lot of articles show how to do this with docker-compose file and mount code with --volume but I didn't find any example how to use this on production (without volume).
Only one acceptable solutions for me (in this time) is make one container with nginx and php-fpm together but I'm not sure when is a good way (I try to find best practice).
Do you have any experiences with this or any idea how to solve it?
Thanks for any response!

Answer 1

I solve the problem by making a shared volume with the docker-compose file:
version: '3'
volumes:
share_place:
services:
php:
image: php:5-fpm-alpine
ports:
- 9000:9000
volumes:
- share_place:/var/www/app
nginx:
image: nginx:alpine
ports:
- 3000:80
volumes:
- share_place:/var/www/app
This will create a volume share_place that will share the data between the two container.

Answer 2

At this time I use smth like:
Dockerfile:
FROM php:fpm
COPY . /var/www/app/
WORKDIR /var/www/app/
RUN composer install
EXPOSE 9000
VOLUME /var/www/app/web
Dockerfile.nginx
FROM nginx
COPY default /etc/nginx/default
docker-compose.yml
app:
build:
context: .
web:
build:
context: .
dockerfile: Dockerfile.nginx
volumes_from: app
But in few days on 17.05 release we can do in one Dockerfile smth like:
FROM php:cli AS builder
COPY . /var/www/app/
WORKDIR /var/www/app/
RUN composer install && bin/console assets:dump
FROM php:fpm AS app
COPY --from=builder /var/www/app/src /var/www/app/vendor /var/www/app/
COPY --from=builder /var/www/app/web/app.php /var/www/app/vendo /var/www/app/web/
FROM nginx AS web
COPY default /etc/nginx/default
COPY --from=builder /var/www/app/web /var/www/app/web