Introduction to Docker Compose

Introduction to Docker Compose

Introduction to docker compose

Compose is a tool for defining and running multi-container Docker applications. With Compose, you use a YAML file to configure your application’s services. Then, with a single command, you create and start all the services from your configuration. To learn more about all the features of Compose, see > the list of features> . Compose works in all environments: production, staging, development, testing, as well as CI workflows. You can learn more about each case in > Common Use Cases> . Using Compose is basically a three-step process:

• Define your app’s environment with a - Dockerfile- so it can be reproduced anywhere.
• Define the services that make up your app in - docker-compose.yml- so they can be run together in an isolated environment.
• Run - docker-compose up- and Compose starts and runs your entire app. source : - https://docs.docker.com/compose/

Install compose

sudo curl -L https://github.com/docker/compose/releases/download/1.20.1/docker-compose-$(uname -s)-$(uname -m) -o /usr/local/bin/docker-compose

Set permission executable

sudo chmod +x /usr/local/bin/docker-compose

Check docker-compose version

sudo docker-compose — version

Compose and Wordpress

create directory my_wordpress and enter the directory

mkdir /lab/my_wordpress
cd /lab/my_wordpress

create docker-compose.yml file

version: '3.2'

services:
   db:
     image: mysql:5.7
     volumes:
       - dbdata:/var/lib/mysql
     restart: always
     environment:
       MYSQL_ROOT_PASSWORD: somewordpress
       MYSQL_DATABASE: wordpress
       MYSQL_USER: [username]
       MYSQL_PASSWORD: [password]

wordpress:
     depends_on:
       - db
     image: wordpress:latest
     ports:
       - "8000:80"
     restart: always
     environment:
       WORDPRESS_DB_HOST: db:3306
       WORDPRESS_DB_USER: [username]
       WORDPRESS_DB_PASSWORD: [password]
volumes:
    dbdata:

run compose

sudo docker-compose up -d

View container

sudo docker container ls

Access Wordpress from browser

Thanks.

Reference:

Overview of Docker ComposeLooking for Compose file reference? Find the latest version here. Compose is a tool for defining and running…docs.docker.com