General overview of the Docker containers

1. First Moscow
Docker Meetup
26 02 2015
Fabrizio Soppelsa fsoppelsa@mirantis.com

2. A Docker meetup
Why a meetup
● Informal meeting of friends
● Technical discussions on Docker
● Openstack.ru is our event partner

4. Why Docker
Docker is an open-source engine that
automates the deployment of any
application as a lightweight, portable,
self-sufficient container that will run
virtually anywhere.

5. Virtual machines and Containers

6. In a nutshell
● Unified command interface/API to manage
containers - start, stop, pull, pause, commit
● The interactive Docker tutorial
https://www.docker.com/tryit/
● Docker exploits some of the Linux kernel

7. Implementation
● Building blocks: namespaces + cgroups
● Isolation: namespaces (filesystem, pids,
net, ipc, hostname, uids)
● Management: cgroups: process grouping
● libcontainer

8. Docker is made of...
● The Docker server and client
● Docker images
● Registries (i.e. the Docker Hub)
● Containers

9. Docker in the real world
★ Separation: PaaS and SaaS
★ Isolation: Shared hosting
★ Fast: Sandboxes
★ Easy: Software deployments
★ Repeatable: CI and testing

10. Why is it so f***ing popular
● Easy to use (basic features)
● Software isolation and portability
● Thousands of ready images
● Density
● Start-up and shut-down times

11. End of the virtualization age?
HET

12. Ecosystem
● Written mostly in Go
● The Dockerfile
● Shipyard and other UIs
● Orchestration tools

13. Community

14. 1. Matthew Mosesohn (Mirantis)
Docker off the grid
2. Denis Zaitsev (Yandex)
Scaling the Docker Registry
3. Sergey Melikyan (Mirantis)
Docker and OpenStack Murano
4. Andrey Vagin (Parallels)
Libcontainer: Joining forces under one roof
5. Plan B: eer!
Today