MINIMALIST OPERATING SYSTEMS FOR CONTAINERS

@endersonmaia

You’ll see

What’s a container

Container Implementations

Containers vs. VMs

Minimalist OSes for Containers

Docker and its Containers Images

What’s a container ?Operating System Virtualization

Isolation

processes

filesystem

network

users

"chroot on steroids"

Container Implementationschroot (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

Containers vs. VMs

Less overhead

Faster start

Greater density

Portability *

Containers vs. VMs

Docker

Image Management

Resource, Filesystem (UnionFS) & Network Isolation

Resource Control (cgroups)

Sharing

Process Management

DEMO

Container Host OSes

Small footprint

Atomic updates

No package management

Everything* runs on a container

Tools for cluster management & containers announcement and discovery *

boot2docker

Lightweight Linux for Docker

based on Tiny Core Linux

VirtualBox

27MB and boots in ~5s

docker, rkt

etcd

fleet

flannel

alpha, beta, stable channels

safe-rollback

kexec

Fedora/RedHat

SELinux

rpm-ostree

RedHat Enterprise Registry

Cockpit

Snappy Ubuntu Core

the same

image-based

transactional

frameworks

snappy apps (like packages)

Snappy Ubuntu Core

Docker as PID 1

20MB

Optimized for vSphere

supports Docker, rkt, and the Pivotal Garden container specifications

Project Lightwave

Docker Container Images

Docker Language Stack

c/c++ (gcc)

clojure

go (golang)

hy (hylang)

rails and ruby

java

node

perl

php

python

…

DEMO

QUESTIONS ?

@endersonmaia