Multiple WordPress sites with one shared database using Docker

Question

I want to run several WordPress websites with one common database using dockers.

Is it possible to specify a database and install the corresponding volume in a specific sql file to initialize WordPress for each container in the file docker-compose.yml?

---

For example, I have three files docker-compose.ymlfor a shared container, siteA and siteB.

When I started docker-compose upin ./shared, two databases will be created for two sites (example_a and example_b).

And when I run docker-compose upin ./siteA, I want to change the current database to example_aand initialize the site with a certain amount of sql data combined with ./siteA/mysql/setup.sql.

The same thing happens with the site.

I know that I can specify the database and volumes as - WORDPRESS_DB_NAME: example_aand - ./db-data/mysql.dump.sql:/docker-entrypoint-initdb.d/install_wordpress.sqlunder the mysql docker-compose.yml, but I have only one common mysql and I can not specify the DB and that for each site.

---

I have several files that docker-compose.ymllook something like this.

./common/Docker-compose.yml

version: "2"

services:

  proxy:
    image: jwilder/nginx-proxy
    privileged: true
    container_name: proxy
    ports:
      - 80:80
      - 443:443
    volumes:
      - /var/run/docker.sock:/tmp/docker.sock:ro
      - ./certs:/etc/nginx/certs:ro
    restart: always
    logging:
      options:
        max-size: 5m
        max-file: "10"

  mysql:
    image: mysql:5.7
    container_name: mysql
    command: >
      --character-set-server=utf8mb4
      --collation-server=utf8mb4_general_ci
      --max-allowed-packet=128M
    ports:
      - "3306:3306"
    environment:
      - MYSQL_ROOT_PASSWORD=foobar
    restart: always
    volumes:
      - db-data:/var/lib/mysql
      - ./mysql/sql-setup.sql:/docker-entrypoint-initdb.d/sql-setup.sql # to create multiple databases (e.g. example_a, example_b)
    logging:
      options:
        max-size: 5m
        max-file: "10"

volumes:
  db-data:
    driver: local

networks:
  default:
    external:
      name: shared

./Sitea/Docker-compose.yml

version: "2"

services:
  example_a_wordpress:
    image: wordpress
    container_name: a.example
    environment:
      WORDPRESS_DB_NAME=example_a
      WORDPRESS_DB_PASSWORD=foobar
      VIRTUAL_HOST: a.example.dev
    external_links:
      - mysql
    restart: always
    volumes:
      - ./dist/theme:/var/www/html/wp-content/themes/main
      - ./dist/assets:/var/www/html/assets
    logging:
      options:
        max-size: 5m
        max-file: "10"

networks:
  default:
    external:
      name: shared

./SITEB/Docker-compose.yml

version: "2"

services:
  example_b_wordpress:
    image: wordpress
    container_name: b.example
    environment:
    WORDPRESS_DB_NAME=example_b
    WORDPRESS_DB_PASSWORD=foobar
      VIRTUAL_HOST: b.example.dev
    external_links:
      - mysql
    restart: always
    volumes:
      - ./dist/theme:/var/www/html/wp-content/themes/main
      - ./dist/assets:/var/www/html/assets
    logging:
      options:
        max-size: 5m
        max-file: "10"

networks:
  default:
    external:
      name: shared

Answer 1

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Answer 2

wp_config.php

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