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Kickass Development Environments with Docker (PHP Hampshire, July 2016)

Kickass Development Environments with Docker (PHP Hampshire, July 2016)

Docker, the hottest technology around at the moment. It swept the Ops world by storm in 2014, became mainstream in 2015, and now it’s set to dominate the developer world, in 2016.

Docker is a tool that allows you to package your application up into a single-runnable distributable binary - akin to the phar, but in Hulk mode. Docker allows you, a developer, to specify the exact environment your application needs to run, across development; test; staging; and production.

In this talk I will cover the creation of this utopian distributable and show you how to can compose your entire production infrastructure locally with only a small YAML file and without installing a single thing.

Lets say hello, to Docker.

David McKay

July 14, 2016
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  1. [email protected] @rawkode github.com/rawkode ~ Software Consultant Docker Glasgow Organiser Scotland

    PHP Organiser Running Docker since 0.4 (June 2013) • PHP / Go / Elixir • DevOps / CI / CD / Docker • CQRS & Event Sourcing • Domain-Driven Design • TDD / BDD
  2. Development Environments circa 2000 $ tree awesome-million-pound-project └── src ├──

    game.php ├── game.php.bk-david ├── game.php.bk-deano ├── main.php ├── main.php.maybe-fixed ├── main.php.bk-1999-12-02 ├── main.php.bk-1999-12-02.2 ├── player.php ├── player.php.orig └── .swp.player.php
  3. Production Environments circa 2000 $ tree awesome-million-pound-project └── src ├──

    game.php ├── game.php.bk-david ├── game.php.bk-deano ├── main.php ├── main.php.maybe-fixed ├── main.php.bk-1999-12-02 ├── main.php.bk-1999-12-02.2 ├── player.php ├── player.php.orig └── .swp.player.php
  4. Vagrant Problems • You’re creating and managing VMs for each

    project / service • Those VM’s are mutable / prone to error by user changes • They’re built JIT (most cases) • How long goes your vagrant up take?
  5. What is Docker? Docker allows you to package an application

    with all of its dependencies into a standardized unit for software development. docker.com
  6. The Docker Family • Docker • Docker Engine • Docker

    Registry • Docker Compose • Docker Machine • Docker Swarm
  7. Official Images http://hub.docker.com • php (5.5, 5.6, 7.0) • redis

    • memcached • elasticsearch • mysql • postgres • mongo • node • rabbitmq • …
  8. docker run \ -e APP_ENV=development \ -v .:/var/www \ -p

    0.0.0.0:10000:80 \ --link elasticsearch:elasticsearch \ --link postgres:postgres \ --link memcached:memcached \ app:1
  9. Docker Compose Demo Let’s setup a project with: • PHP

    7 • Elasticsearch • PostgreSQL • memcached
  10. Boilr Demo Let’s setup a project with: • PHP 7

    • Elasticsearch • PostgreSQL • memcached
  11. composer install --ignore-platform-reqs • IDE AutoComplete • Cached to ~/.composer

    • Not passing keys or tokens to Docker container for satis / private repositories Composer Keep it local
  12. docker-compose down -v • Stops and removes all containers and

    networks in the project • -v means delete the volumes as well Down Means Destroy docker-compose down -v
  13. Base Image ONBUILD FTW # Dockerfile ONBUILD COPY . /var/www

    # docker-compose.yml application: image: base-image volumes: - .:/var/www # CI build FROM base-image
  14. Base Image NIGHTLY BUILDS cron / curl / wget /

    whatever! # There’s no cascading builds # in Docker. Automate it. FROM your-company:base:latest FROM your-company:base:dev FROM your-company:base:prod
  15. Image Size Keep it Lean! RUN DEBIAN_FRONTEND=noninteractive \ apt-get update

    \ && apt-get install -y \ --no-install-recommends apache2 \ && rm -rf /var/lib/apt/lists/*
  16. Image Size GOTCHAS ADD . /var/www RUN chown www-data -R

    /var/www THIS WILL COST YOU TWICE THE MiBs! Do it at entrypoint, if really needed
  17. volumes: cache: driver: local logs: driver: local app: - volumes:

    - cache:/var/www/app/cache - logs:/var/www/app/logs Volumes Containerised logs and cache!
  18. Abuse Docker testing-database-pdo: extends: service: testing-php-5.5 environment: - DATABASE_USER=root -

    DATABASE_PASS=testing - DATABASE_NAME=testing testing-database-mysql: extends: service: testing-database-pdo links: - mysql:mysql environment: - DATABASE_DRIVER=pdo_mysql - DATABASE_HOST=mysql - DATABASE_PORT=3306
  19. Thanks for having me! Questions? @rawkode Send constructive (ish) feedback

    to: joind.in/talk/914c2 Wondering about my broken smile? Ask in the pub :P