Docker: разговор по душам

Internal Altoros Meet up, Aug 4, 2016

Transcript

2. Terminology
3. Container vs Image Host vs Guest Docker vs Containers Kernel vs OS
4. lxc vs libcontainer vs others https://github.com/opencontainers/runtime-spec https://www.opencontainers.org/
5. “Layered” File System
6. “Layered” File System
7. PhotonOS CoreOS Operating System to run Docker Daemon Ubuntu
8. * DockerSlim will do the work for you alpine Operating System inside Docker Ubuntu* busybox
9. How to run docker on your development host?
10. DOCKER TOOLBOX
12. → docker-machine env default export DOCKER_TLS_VERIFY="1" export DOCKER_HOST="tcp://192.168.99.100:2376" export DOCKER_CERT_PATH="/Users/allomov/.docker/ machine/machines/default" export DOCKER_MACHINE_NAME="default" Why do I need to run eval $(…)
13. docker docker machine docker compose docker swarm
15. d docker commands docker ls docker env docker create docker restart docker ssh docker status
16. d docker aliases alias dstart='docker-machine start default’ alias de=‘eval $(docker-machine env default)’ alias dl='docker ps -l -q' alias drun='docker run -t -i’ alias dstop='docker stop' alias dip="docker inspect \`dl\` | grep IPAddress | cut -d '\"' -f 4" function dbash
17. DOCKER MACHINE
18. d docker-machine commands docker-machine ls docker-machine env docker-machine create docker-machine restart docker-machine ssh docker-machine status
19. docker-machine create and manage VM with docker Amazon Web Services Microsoft Azure Digital Ocean Exoscale Google Compute Engine Generic Microsoft Hyper-V OpenStack Rackspace IBM Softlayer Oracle VirtualBox VMware vCloud Air VMware Fusion VMware vSphere Available Drivers
20. d docker-machine commands docker-machine ls docker-machine env docker-machine create docker-machine restart docker-machine ssh docker-machine status
21. DOCKER COMPOSE
22. docker-compose manage multiple docker containers on one host Sample web: build: . command: python app.py links: - db ports: - "8000:8000" db: image: postgres
23. docker-compose was fig.sh earlier http://www.fig.sh/ (KI
24. d docker-compose commands docker-compose run docker-compose build docker-compose logs docker-compose ps docker-compose config docker-compose port
25. DOCKER SWARM
27. d docker-compose commands docker-compose run docker-compose build docker-compose logs docker-compose ps docker-compose config docker-compose port
28. Ответы на вопросы
29. • Указывать версию image или использовать latest? • Какая разница между ruby:2.3-onbuild ruby:2.3-alpine ruby: 2.3-slim? • Как понять что мне нужен отдельный контейнер для чего-то (например для sidekiq)? Для чего точно не стоит использовать контейнеры? (persisted data) • Monit/autostart containers • How to automate deploy (with downtime and without)? • What data goes to Docker Hub? Should .dockerignore be equal .gitignore? Alternatives for Docker Hub? Slow connection? • What data will be kept (volumes) after restarting containers? How to share between different VMs (not containers)? • How to protect data from being erased because of misconfiguration? What the best way to backup data?
30. • I faced a problem. The same official postgres container started properly on OS X, but didn’t start properly with same configuration on Ubuntu 19. (failed to pass postgres authentication). I manage to run on Ubuntu 16 previous version of postgres container, but failed to run this version on OS X. What could be the problem? How often such different behaviour occurs? Are there any guarantee that my container tested on OS X with same configuration will work in the same way on other host?
31. DOCKER FOR MAC AND WINDOWS MacOS Yosemite 10.10.3 Windows 10