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Тарас Кирилюк — Docker basics. How-to for Drupal developers
The document provides an overview of Docker basics aimed at Drupal developers, explaining software isolation and the advantages of using Docker for application deployment. It covers the components of Docker, including images, containers, and registries, along with use cases for integrating Docker into Drupal development environments. Additionally, the document highlights practical examples and commands for using Docker effectively, including running containers, managing services, and utilizing Docker Compose for different development environments.
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Тарас Кирилюк — Docker basics. How-to for Drupal developers
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- 2. Hi @here! I amTaras Kyryliuk I am here because I have been using Docker for almost a Year and have something to say about it 2 Disclaimer: I am a Drupal developer and automation maniac
- 3. Overview ▹ Software isolation ▹Introducing Docker ▹ Docker in Drupal development 3
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- 5. Why we needSoftware 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 5
- 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 7
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- 9. Hardware virtualization ▹Large overheadbecause of hypervisor layer ▹Easy to run and manage ▹Can run any operating system 9
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- 12. ” Docker is anopen-source engine that automates the deployment of applications into containers. 12
- 13. ” Docker containers wrapa 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 13
- 14. ▹The Docker clientand server ▹Docker Images ▹Registries ▹Docker Containers 14 Docker components
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- 16. “Images are thebuilding 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 froma Dockerfile
- 18. 18 Building an image froma Dockerfile $ docker build -t tutorial/nginx .
- 19. Updating and committingan 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/ 19
- 20. ▹Docker Hub (publicand private repositories) ▹Own private registry ▹Hosted private registry Docker registries20
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- 22. Container ports magic22 HostOS 8080 Container with Nginx 80
- 23. 3. Docker inDrupal development What problems we can solve using it. 23
- 24. Docker use cases ▹Usecontainer as a Service ▹Use container as a tool ▹Run one host Drupal project with Docker Compose ▹Run own cloud with Docker Swarm 24
- 25. Container as aService (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> 25 http://severalnines.com/blog/mysql-docker-containers-understanding-basics
- 26. Container as aService (MySQL as an example)26 http://severalnines.com/blog/mysql-docker-containers-understanding-basics
- 27. Use container asa 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 DockerCompose ▹ 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. 28
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- 30. DEV-STAGE-PROD env with DockerCompose 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/ 30
- 31. Own cloud withDocker 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/ 31
- 32. By the way! Youcan forget about server provisioning! All you need is Docker installed on any Linux distro! 32
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- 34. THANK YOU! You canfind me at: taras.kiriluk tkiriluk@gmail.com 34