Running applications with Docker Compose

Docker Compose (http://docs.docker.com/compose/) is the native Docker tool that runs interdependent containers that make up an application. We define a multicontainer application in a single file and feed it to Docker Compose, which sets up the application. In this recipe, we'll once again use WordPress as a sample application to run.

Getting ready

To install Docker Compose, run the following command:

$ sudo pip install docker-compose

How to do it

Follow these steps:

1. Create a directory for the application, and within it, create docker-compose.yml to define the app:

$ cd wordpress_compose/
$ cat docker-compose.yml
version: '3.1'
services:
  wordpress:
    image: wordpress
    restart: always
    ports:
      - 8080:80
    environment:
      WORDPRESS_DB_PASSWORD: example
  mysql:
    image: mysql:5.7
    restart: always
    environment:
      MYSQL_ROOT_PASSWORD: example

2. We took the preceding example from the official WordPress Docker repository on Docker...