Kickass Development Environments with Docker (Edinburgh PHP, January 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.

Transcript

1. Kickass Development Environments with Docker
2. david@rawkode.com @rawkode github.com/rawkode Me! ★ Director of Development for TeamRock ★ Docker Glasgow Organiser Taking on consultancy work from Feb: • PHP ~ Go ~ Java ~ Obj-C • CQRS & Event Sourcing • DevOps / CI / CD / Docker • Domain-Driven Design • Framework agnostic code • TDD / BDD
3. What is Docker?
4. What is Docker? Docker allows you to package an application with all of its dependencies into a standardized unit for software development. docker.com
5. What’s the goal? A single, runnable, distributable executable
6. The Docker Family • Docker • Docker Engine • Docker Registry • Docker Compose • Docker Machine • Docker Swarm
7. Docker Image
8. Official Images http://hub.docker.com • php (5.5, 5.6, 7.0) • redis • memcached • elasticsearch • mysql • postgres • mongo • node • rabbitmq • …
9. FROM php:7.0
10. ADD ./ /var/www COPY ./ /var/www Warning: Be careful with ADD
11. WORKDIR /var/www
12. ENTRYPOINT [ “php” ]
13. CMD [ “-v” ]
14. Docker Container
15. Demo
17. Challenge #1
18. do { docker build docker run } while (coding);
20. Docker Volumes
21. … -v `pwd`:/var/www
22. … -v /var/log/apache2
23. … --volumes-from=app
24. Demo
26. Challenge #2
27. VirtualBoxFs
28. VirtualBox Fileshare is slow ...
29. rsync! https://github. com/rawkode/docker-machine- rsync docker-machine create -d virtualbox \ --virtualbox-no-share \ development
30. Demo
32. Challenge #3
33. Dependencies
34. Project Dependencies
35. Project Dependencies
36. docker run memcached docker run postgres docker run elasticsearch
37. 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 edpug:1
39. Docker Compose
40. application: … links: - redis:redis - postgres:postgres redis: image: redis
41. Demo
43. Docker Tips
44. 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
45. Base Image ONBUILD FTW # Dockerfile ONBUILD COPY . /var/www # docker-compose.yml application: image: base-image volumes: - .:/var/www
46. Base Image NIGHTLY BUILDS cron / curl / wget / whatever! FROM your-company:base:latest FROM your-company:base:dev FROM your-company:base:prod
47. 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/*
48. volumes-from: - cache_and_logs cache_and_logs: - image: busybox - volumes: - /var/www/app/cache - /var/www/app/logs Data Containers Containerised logs and cache!
49. 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
50. Questions? @rawkode http://slack.scotlandphp.co.uk My dog as a Christmas pudding!