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Docker Practical Use Cases
This document outlines several practical use cases for Docker, including running different versions of software like MySQL and PHP, using Docker as a development playground to test software across environments, and setting up local build farms. It also discusses common issues with Docker like the difference between containers and virtual machines, and tips for working with Docker like using docker exec to access running containers. Overall, the document argues that Docker is a useful tool with many potential use cases and over 100,000 available images, though there are some nuances to using containers effectively.
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Docker Practical Use Cases
- 1. Docker Practical UseCases Alexei Yuzhakov
- 2. Docker?! • Buzz word •No clear understanding • Rarely used for dev & testing use cases • You apps deployment
- 3. Installation • Docker Toolbox• Kitematic
- 4. Use Case: DifferentVersions • LAMP app • MySQL depends on Linux distro • Different versions of MySQL
- 5. Use Case: DifferentVersions • MySQL 5.5 • MySQL 5.6 • MySQL 5.7 • MariaDB 10.1
- 6. Use Case: DifferentVersions • docker run … -d mysql:5.5 • docker run … -d mysql:5.6 • docker run … -d mysql:5.7 • docker run … -d mariadb:10.1
- 7. Use Case: PHP7 • Find problems • Fix code • Fix unit tests
- 8. Use Case: PHP7 • docker run –it –v `pwd`:/app php:7 bash • Container as playground • PHP 7 vs. PHP 5.6
- 9. Use Case: SimilarEnvironment • Ubuntu 12.04 & Travis CI • docker run -it ubuntu:12.04 bash • 58 sec for 1st time • <1 sec for the next time
- 10. Use Case: BuildFarm • Local build farm • Jenkins • TeamCity • Buildbot
- 11. Use Case: ToolsEvaluation
- 12. Use Case: QuickInstall
- 13. More Use Case •… • Your stories here
- 14. Issues & Tricks •Docker container != VPS • Process (life cycle) • No SSH • docker exec -it <CT-ID> bash
- 15. Issues & Tricks •No connection to Docker daemon
- 16. Issues & Tricks •docker version • VirtualBox machine status • eval "$(docker-machine env)"
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- 18. Issues & Tricks •Container changes • Environment variables • Port-mapping • Volume mapping • Container re-creation
- 19. Issues & Tricks •Image docs
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- 21. Issues & Tricks •docker run … • docker commit • docker images • docker run …
- 22. Issues & Tricks •Dockerfile & docker build • Mount points • Main process selection • Privileged operations • ...
- 23. Conсlusion • “Must have”tool • 100,000+ ready-to-use images • A lot of use cases
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