Docker для чайників. Просто про складне. Використання для локальної розробки. Як Docker може спростити автоматизацію CI Workflow. Досвід використання на реальних Drupal проектах.

1. Docker basics.
How-to
For Drupal devs

2. Hi @here!
I am Taras Kyryliuk
I am here because I have been
using Docker for almost a Year and
have something to say about it
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Disclaimer: I am a Drupal developer and
automation maniac

3. Overview
▹ Software isolation
▹ Introducing Docker
▹ Docker in Drupal development
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4. 1.Software isolation
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5. Why we need Software
Isolation?
Starting from the assumption that software will always
have bugs, we need a way to isolate and neutralize the
effects of the bugs…
© internet
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6. 6 Virtualization
Operating system-level
Containers
OpenVZ, Solaris Zones, lxc,
libcontainer
Hardware-level
Virtual machines
KVM, Xen, VMware,
VirtualBox, xhyve

7. Operating system-level
virtualization - Containerisation
▹Limited overhead
▹Do not require a hypervisor layer
▹Allow a greater density of containers to run on a host
▹Can be complex, hard to set up, and difficult to
manage and automate
▹Can run the same or a similar guest operating system
as the host machine
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8. Containerisation
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9. Hardware virtualization
▹Large overhead because of hypervisor layer
▹Easy to run and manage
▹Can run any operating system
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10. Hardware virtualization
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11. 11
2. Introducing Docker

12. ”
Docker is an open-source engine that
automates the deployment of applications
into containers.
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13. ”
Docker containers wrap a piece of software in a complete filesystem that
contains everything needed to run: code, runtime, system tools, system
libraries – anything that can be installed on a server. This guarantees that the
software will always run the same, regardless of its environment.
https://www.docker.com/what-docker
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14. ▹The Docker client and server
▹Docker Images
▹Registries
▹Docker Containers
14 Docker components

15. 15
Docker
architecture

16. “Images are the building blocks of the Docker world.”
https://www.dockerbook.com
Ways to create images:
▹ Building an image from a Dockerfile
▹ Updating and committing an image
Docker images16

17. 17
Building an
image from a
Dockerfile

18. 18
Building an
image from a
Dockerfile
$ docker build -t tutorial/nginx .

19. Updating and committing an image
Run container:
$ docker run -t -i training/sinatra /bin/bash
Install what you need:
$ root@0b2616b0e5a8:/# apt-get install -y ruby2.0-dev
$ root@0b2616b0e5a8:/# gem2.0 install json
Commit changes:
$ docker commit -m "Added json gem" -a "Kate Smith" 0b2616b0e5a8
ouruser/sinatra:v2
https://docs.docker.com/engine/tutorials/dockerimages/
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20. ▹Docker Hub (public and private repositories)
▹Own private registry
▹Hosted private registry
Docker registries20

21. Run first container21

22. Container ports magic22
Host OS
8080
Container with Nginx
80

23. 3. Docker in Drupal development
What problems we can solve using it.
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24. Docker use cases
▹Use container as a Service
▹Use container as a tool
▹Run one host Drupal project with Docker Compose
▹Run own cloud with Docker Swarm
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25. Container as a Service
(MySQL as an example)
Run:
$ docker run -d --name=example-mysql --env="MYSQL_ROOT_PASSWORD=mypassword" mysql
Get IP:
$ docker inspect example-mysql
Install Mysql Client:
$ apt-get install mysql-client
Profit:
$ mysql -uroot -pmypassword -h 172.17.0.20 -P 3306
mysql>
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http://severalnines.com/blog/mysql-docker-containers-understanding-basics

26. Container as a Service
(MySQL as an example)26
http://severalnines.com/blog/mysql-docker-containers-understanding-basics

27. Use container as a tool
(PHPUnit as an example)27
https://hub.docker.com/r/phpunit/phpunit/
cd to folder with tests and Run:
$ docker run -v $(pwd):/app --rm phpunit/phpunit run
Profit!
▹ No need to install
▹ Choose any version
▹ Can use different versions for different projects

28. DEV-STAGE-PROD env
with Docker Compose
▹ Compose is a tool for defining and running
multi-container Docker applications.
▹ With Docker Compose, we define a set of
containers to boot up, and their runtime
properties, all defined in a YAML file.
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29. Example
docker-compose.yml
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30. DEV-STAGE-PROD env
with Docker Compose
You should have set of Compose-files for different environments.
▹ docker-compose.yml
▹ docker-compose.override.yml
▹ docker-compose.dev.yml
▹ docker-compose.ci.yml
▹ docker-compose.prod.yml
Run site with different commands.
Local:
$ docker-compose up -d
Dev:
$ docker-compose -f docker-compose.yml -f docker-compose.dev.yml up -d
See more: https://docs.docker.com/compose/extends/
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31. Own cloud with Docker Swarm mode
▹ Since Docker 1.12 it supports clustering out of the
box
▹ It turns a pool of Docker hosts into a single virtual
Docker host
More: https://docs.docker.com/engine/swarm/
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32. By the way!
You can forget about server provisioning!
All you need is Docker installed on any Linux
distro!
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33. 33
Questions?

34. THANK YOU!
You can find me at:
taras.kiriluk
tkiriluk@gmail.com
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