Pass environment to add docker to symfony config

Question

Pass environment to add docker to symfony config

I want to pass config parameters from docker-compose file to my Symfony application, I tried this:

app:
    image: <NGINX + PHP-FPM IMAGE>
    environment:
        DATABASE_HOST: db

My parameters.yml file:

database_host: "%env(DATABASE_HOST)%"

I am getting a 500 error "Environment variable not found: DATABASE_HOST"

I also tried SYMFONY__DATABASE_HOST in docker-compose but also didn't work.

How it works?

+3

docker environment-variables symfony

ninja_dev 24 Mar 17 at 22:42

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1 answer

Christian elowsky · Answer 1 · 2017-03-26T22:13:45+0000

The error you are getting is about Symfony environment variables (see here) . Docker creates environment variables fetched from a file .env

that is inside the build context (AKA is the directory you want docker-compose from) from a file docker-compose.yml

. What you really want to do is make sure that the environment variables that you set in the symfony config / options and your file docker-compose.yml

match in particular the db node.

You should consider hacking images into PHP-FPM and Nginx images to have the best potential scalability and separation of concerns according to the best practices outlined by Docker. All of these technologies have regularly maintained images available on Docker Hub .

Here's my docker-compose.yml

which creates containers for PHP-FPM, MySQL, and Nginx in a multi-container environment with the latest stable packages available today.

version: '3'

services:
    db:
        image: mysql
        volumes:
            - ./.data/db:/var/lib/mysql
        environment:
            MYSQL_ROOT_PASSWORD: ${MYSQL_ROOT_PASSWORD}
            MYSQL_DATABASE: ${MYSQL_DATABASE}
            MYSQL_USER: ${MYSQL_USER}
            MYSQL_PASSWORD: ${MYSQL_PASSWORD}
    php:
        build: php7.1-fpm
        depends_on:
            - db
        ports:
            - "9000:9000"
        volumes:
            - symfony-bind-mount:/var/www/symfony
            - symfony-logs-bind-mount:/var/www/symfony/app/logs
    nginx:
        build: nginx
        depends_on:
            - php
        ports:
            - "8025:8025"
            - "80:80"
        volumes:
            - symfony-bind-mount:/var/www/symfony
            - nginx-logs-bind-mount:/var/log/nginx

volumes:
    symfony-bind-mount:
        driver: local
        driver_opts:
            o: bind,rw
            type: none
            device: ${SYMFONY_APP_PATH}
    nginx-logs-bind-mount:
        driver: local
        driver_opts:
            o: bind,rw
            type: none
            device: ${DOCKER_SYMFONY_PATH}/logs/nginx
    symfony-logs-bind-mount:
        driver: local
        driver_opts:
            o: bind,rw
            type: none
            device: ${DOCKER_SYMFONY_PATH}/logs/symfony

Here's my .env file:

# Symfony application path
SYMFONY_APP_PATH=/absolute/path/to/symfony/project

# Path to local docker-symfony repository
DOCKER_SYMFONY_PATH=/absolute/path/to/sibling/docker/directory

# MySQL
MYSQL_ROOT_PASSWORD=root
MYSQL_DATABASE=mydb
MYSQL_USER=
MYSQL_PASSWORD=password

You can check out my docker-symfony maxpou repository fork here . I updated the docker-compose.yml and set the bindings to be compatible with version 3 of the Compose file format.

Pass environment to add docker to symfony config

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