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Docker Compose+YAML+Cheatsheet

This document summarizes a Docker Compose file that defines two services - a MySQL database (db) and WordPress. The db service uses the mysql:5.7 image, maps a named volume for data, and sets environment variables for the database credentials. The wordpress service declares a dependency on db, uses the wordpress:latest image, maps the host port 8000 to the container's port 80, and sets environment variables for the database connection credentials. A named volume is created and shared between the two services.

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53 views1 page

Docker Compose+YAML+Cheatsheet

This document summarizes a Docker Compose file that defines two services - a MySQL database (db) and WordPress. The db service uses the mysql:5.7 image, maps a named volume for data, and sets environment variables for the database credentials. The wordpress service declares a dependency on db, uses the wordpress:latest image, maps the host port 8000 to the container's port 80, and sets environment variables for the database connection credentials. A named volume is created and shared between the two services.

Uploaded by

StavriJosifi
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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Docker Compose – Decomposed

(MySQL-WordPress Example)

Compose file syntax version


(latest 3.7) version: ‘3.7’

Configuration object for


containers services:

Name of the Service db:

Base Docker image for


container created by db service image: mysql:5.7

Volume name: Mount Path volumes:


within the container
- db_data:/var/lib/mysql

restart policy set to “always” restart: always

environment:
Passing log-in info through
environment variables in
- MYSQL_ROOT_PASSWORD: abc
<key>: <value> form - MYSQL_DATABASE: wordpress
- MYSQL_USER: wordpress
- MYSQL_PASSWORD: wordpress

xfor

Name of the Second Service wordpress:

Explains service dependencies. depends_on:


wordpress service will start after db service. - db

image: wordpress:latest

Port mapping as strings between ports:


“<host_PORT>:<container_PORT>” - "8000:80“

restart: always

environment:
WORDPRESS_DB_HOST: db:3306
WORDPRESS_DB_USER: wordpress
WORDPRESS_DB_PASSWORD: wordpress

Create a reusable named volume for


both services. volumes:
db_data:

More Compose Parameters

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