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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!
