Using composer with wordpress in docker

Question

I'm try to setup a docker workspace with Alpine, PHP, Apache, MySQL and Composer.

Currently I'm trying to use the following images:

PHP, Alpine and Composer: https://hub.docker.com/r/petehouston/docker-alpine-php-composer/

Wordpress: https://hub.docker.com/_/wordpress/

I created a docker-compose.yml file to manage this dependencies for me.

docker-compose.yml

version: '2'

services:
   db:
     image: mysql:5.7
     volumes:
       - ./db:/var/lib/mysql
     restart: always
     environment:
       MYSQL_ROOT_PASSWORD: wordpress
       MYSQL_DATABASE: wordpress
       MYSQL_USER: wordpress
       MYSQL_PASSWORD: wordpress

   wordpress:
     depends_on:
       - db
     image: wordpress:latest
     volumes:
       - ./www:/var/www/html
     links:
       - db
     ports:
       - "8000:80"
     restart: always
     environment:
       WORDPRESS_DB_HOST: db:3306
       WORDPRESS_DB_PASSWORD: wordpress

   alpine:
     image: petehouston/docker-alpine-php-composer:latest
     links:
       - wordpress

So my problem is I'm trying to use the composer of the alpine container to manager my Wordpress in the wordpress container but when i try to use the following command:

docker run --rm -v $(pwd):/www -w /wordpress/var/www/html composer/composer create-project roots/sage your-theme-name 8.5.0

nothing happens, and the alpine container doesn't stay up, after i run compose-docker.up he exits

Answer 1

You can't access to Wordpress container from Alpine container using -w /wordpress/var/www/html . As far as I understand, image petehouston/docker-alpine-php-composer:latest provides PHP deployment environment. That means you should use this image instead of wordpress image . Your compose file can be like

version: '2'

services:
   db:
     image: mysql:5.7
     volumes:
       - ./db:/var/lib/mysql
     restart: always
     environment:
       MYSQL_ROOT_PASSWORD: wordpress
       MYSQL_DATABASE: wordpress
       MYSQL_USER: wordpress
       MYSQL_PASSWORD: wordpress
   alpine:
     image: petehouston/docker-alpine-php-composer:latest
     volumes:
       - ./www:/home
     links:
       - db
     ports:
      - "8000:80"
     command: composer require phpunit/phpunit
     restart: always

Plz give me feedback. I'm sorry because i can't comment to get more information from you. Should you still get errors, comment here. I'll recheck