The document discusses getting started with Docker for local development. It introduces Docker concepts like images and containers. It explains how to start with an existing image from DockerHub or by creating a Dockerfile. It also introduces Docker Compose as a way to define and run multi-container apps locally. Resources for further learning about Docker, Docker Compose, and tools like Lando are provided.

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Develop With Docker
Containers for everyone!

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Maura Teal (@mlteal)
Software Engineer
at Pagely and NorthStack

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Docker Docker Docker…

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Local Development
• Local machine
• MAMP/WAMP/XAMPP
• Vagrant
• Varying Vagrant Vagrants (VVV)
• ServerPress, Local by Flywheel, etc

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What & Why?
1. https://aws.amazon.com/docker/
2. https://www.docker.com/why-docker
• “Software platform that allows you to build, test,
and deploy applications quickly”
• [Relatively] simple yet powerful tooling
• Performance
Docker Docker Docker…

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Project
Service A
(Database)
Image: mysql-5.7
Getting Started with Docker
Service B
(Webserver)
Image: nginx
Service C
(WordPress)
Image: php7.2-fpm

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Why Docker
• Consistency
• Consistency
• Consistency

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Required
• Docker for [your OS]
• Terminal
Getting Started with Docker
Optional
• Homebrew (MacOS/Linux)
• Docker Compose

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DockerHub
Images are published to
DockerHub and are
downloaded and used as
a quick-start for projects.
Starting with an Image

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Starting with an Image

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Starting with a Dockerfile
A Dockerfile is a text file that contains the commands a user wants
to call to assemble an image.
• A linux distribution
• PHP
Basic Platform Requirements
• Apache and/or NGINX
• MySQL

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Starting with a Dockerfile
FROM wordpress:php7.1-apache
COPY . /var/www/html
Starting with an all-in-one approach:
1. Download WP Core into a directory on your local machine
2. Create a Dockerfile in that directory with the following:

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Starting with a Dockerfile
Starting with an all-in-one approach:
🦄 :~$ cd myproject
🦄 :myproject$ docker build -t ‘my-image’ .
🦄 :myproject$ docker run --name mysql-cont -e MYSQL_ROOT_PASSWORD=qwerty -d
mysql:5.7
🦄 :myproject$ docker run --name wp-cont --link mysql-cont:mysql -p 8000:80 -d my-image
🦄 :myproject$ docker stop wp-cont
3. Build the image
4. Run the mysql container
5. Run the WP container — accessed at http://localhost:8000

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Important Commands
🦄 :~$ docker image ls
🦄 :~$ docker inspect [IMAGE TAG or ID]
🦄 :~$ docker stop [CONTAINER NAME]
🦄 :~$ docker ps # lists ALL containers and their statuses
🦄 :~$ docker ps | grep [Container ID OR Name (can be partial)]
🦄 :~$ docker exec -ti [Container ID or Name] bash
Find docs and all commands at
https://docs.docker.com/engine/reference/commandline/

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A fork in the road

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Enter: Docker Compose

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Docker Compose
docker-compose.yml defines container configuration & links
@mlteal | #WCPHX | 2019

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Docker Compose
🦄 :~$ cd myproject
🦄 :myproject$ docker-compose up
…
🦄 :myproject$ docker-compose down
1. Build and run your app with compose:

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• Hostname handling
(use dnsmasq/proxy)
• SSL certs for local dev
• Local Email handling
Handling Details
https://github.com/10up/wp-local-docker-v2

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Handling Details (Lando)

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• DockerHub
https://hub.docker.com/
• Docker Compose Docs
https://docs.docker.com/compose/
• Lando
https://docs.devwithlando.io/
Moar Resources

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Maura Teal
@mlteal