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4. Docker Compose and WordPress

You can use Docker Compose to easily run WordPress in an isolated environment built with Docker containers. This quick-start guide demonstrates how to use Compose to set up and run WordPress. Before starting, you'll need to have Compose installed.

4.1 Define the project

1. Create an empty project directory.

   You can name the directory something easy for you to remember. This directory is the context for your application image. The directory should only contain resources to build that image.

   This project directory will contain a docker-compose.yml file which will be complete in itself for a good starter wordpress project.

2. Change directories into your project directory.

   For example, if you named your directory my_wordpress:

    $ cd my-wordpress/
   

3. Create a docker-compose.yml file that will start your Wordpress blog and a separate MySQL instance:

    networks:
       backend:
       
    services:
       db:
         image: mysql:5.7
         volumes:
           - db_data:/var/lib/mysql
         networks:
           - backend
         restart: always
         environment:
           MYSQL_ROOT_PASSWORD: somewordpress
           MYSQL_DATABASE: wordpress
           MYSQL_USER: wordpress
           MYSQL_PASSWORD: wordpress
   
       wordpress:
         depends_on:
           - db
         image: wordpress:latest
         networks:
           - backend
         ports:
           - "8080:80"
         restart: always
         environment:
           WORDPRESS_DB_HOST: db:3306
           WORDPRESS_DB_USER: wordpress
           WORDPRESS_DB_PASSWORD: wordpress
           WORDPRESS_DB_NAME: wordpress
    volumes:
        db_data: {}
   

4.2 Build the project

Now, run docker compose up -d from your project directory.

This pulls the needed images, and starts the wordpress and database containers, as shown in the example below.

$ docker compose up -d
Creating network "my_wordpress_default" with the default driver
Pulling db (mysql:5.7)...
5.7: Pulling from library/mysql
efd26ecc9548: Pull complete
a3ed95caeb02: Pull complete
...
Digest: sha256:34a0aca88e85f2efa5edff1cea77cf5d3147ad93545dbec99cfe705b03c520de
Status: Downloaded newer image for mysql:5.7
Pulling wordpress (wordpress:latest)...
latest: Pulling from library/wordpress
efd26ecc9548: Already exists
a3ed95caeb02: Pull complete
589a9d9a7c64: Pull complete
...
Digest: sha256:ed28506ae44d5def89075fd5c01456610cd6c64006addfe5210b8c675881aff6
Status: Downloaded newer image for wordpress:latest
Creating my_wordpress_db_1
Creating my_wordpress_wordpress_1

4.3 Bring up WordPress in a web browser

At this point, WordPress should be running on port 8080 of your Docker Host, and you can complete the "famous five-minute installation" as a WordPress administrator.

Hint: In AWS Cloud9 use Tools -> Preview -> Preview running applications to open the browser on the appropriate remote address.

NOTE: The Wordpress site will not be immediately available on port 8080 because the containers are still being initialized and may take a couple of minutes before the first load.

Bam, you got Wordpress running with a database in two separate containers. That was easy, wasn't it? At this point, you've completed the tutorial. Now it's time to explore the capabilities of Docker on your on. Have fun! Source: Wordpress on Docker