A brief introduction to Linux Containers and explanation of the available Minimalist OSes targeted to run containers. * http://www.meetup.com/Arapiraca-Dev-Meetup/events/222709815/ * http://www.meetup.com/maceio-dev-meetup/events/222550701/ * https://www.youtube.com/watch?v=i4sO-W7ack8

1. MINIMALIST OPERATING
SYSTEMS FOR CONTAINERS
@endersonmaia

2. You’ll see
What’s a container
Container Implementations
Containers vs. VMs
Minimalist OSes for Containers
Docker and its Containers Images

3. What’s a container ?
Operating System Virtualization
Isolation
processes
filesystem
network
users
"chroot on steroids"

4. Container Implementations
chroot (1982)
FreeBSD Jail (2000)
Linux-VServer (2001)
OpenVZ (2005)
LinuX Containers (LXC) (2008)
Docker (2013)
rkt ( 2014)
FONTE: HTTP://EN.WIKIPEDIA.ORG/WIKI/OPERATING-SYSTEM-LEVEL_VIRTUALIZATION

5. Containers vs. VMs
Less overhead
Faster start
Greater density
Portability *

6. Containers vs. VMs

7. Docker
Image Management
Resource, Filesystem (UnionFS) & Network
Isolation
Resource Control (cgroups)
Sharing
Process Management

8. DEMO

9. Container Host OSes
Small footprint
Atomic updates
No package management
Everything* runs on a container
Tools for cluster management & containers
announcement and discovery *

10. boot2docker
Lightweight Linux for Docker
based on Tiny Core Linux
VirtualBox
27MB and boots in ~5s

11. docker, rkt
etcd
fleet
flannel
alpha, beta, stable channels

12. safe-rollback
kexec

15. Fedora/RedHat
SELinux
rpm-ostree
RedHat Enterprise Registry
Cockpit

16. Snappy Ubuntu
Core
the same
image-based
transactional
frameworks
snappy apps (like packages)

17. Snappy Ubuntu
Core

18. Docker as PID 1
20MB

20. Optimized for vSphere
supports Docker, rkt, and the Pivotal Garden
container specifications
Project Lightwave

21. Docker Container Images

22. Docker Language Stack
c/c++ (gcc)
clojure
go (golang)
hy (hylang)
rails and ruby
java
node
perl
php
python
…

23. DEMO

24. QUESTIONS ?
@endersonmaia