docker practical use cases

Docker Practical Use Cases

Alexei Yuzhakov

Docker?!• Buzz word• No clear understanding • Rarely used for dev & testing use cases• You apps deployment

Installation• Docker Toolbox • Kitematic

Use Case: Different Versions

• LAMP app• MySQL depends on Linux distro• Different versions of MySQL

Use Case: Different Versions

• MySQL 5.5• MySQL 5.6• MySQL 5.7• MariaDB 10.1

Use Case: Different Versions

• docker run … -d mysql:5.5• docker run … -d mysql:5.6• docker run … -d mysql:5.7• docker run … -d mariadb:10.1

Use Case: PHP 7

• Find problems• Fix code• Fix unit tests

Use Case: PHP 7

• docker run –it –v `pwd`:/app php:7 bash • Container as playground• PHP 7 vs. PHP 5.6

Use Case: Similar Environment

• Ubuntu 12.04 & Travis CI• docker run -it ubuntu:12.04 bash• 58 sec for 1st time• <1 sec for the next time

Use Case: Build Farm

• Local build farm• Jenkins• TeamCity• Buildbot

Use Case: Tools Evaluation

Use Case: Quick Install

More Use Case

• …• Your stories here

Issues & Tricks

• Docker container != VPS• Process (life cycle)• No SSH• docker exec -it <CT-ID> bash

Issues & Tricks

• No connection to Docker daemon

Issues & Tricks

• docker version• VirtualBox machine status• eval "$(docker-machine env)"

Issues & Tricks

Issues & Tricks

• Container changes• Environment variables• Port-mapping• Volume mapping• Container re-creation

Issues & Tricks

• Image docs

Issues & Tricks

Issues & Tricks

• docker run …• docker commit• docker images• docker run …

Issues & Tricks

• Dockerfile & docker build• Mount points• Main process selection• Privileged operations• ...

Conсlusion

• “Must have” tool• 100,000+ ready-to-use images• A lot of use cases

Thank You!

Alexei Yuzhakov

ayuzhakov@plesk.comhttps://github.com/sibprogrammer

Questions?