Docker: Please contain your excitement

DockerPlease contain your excitement

DockerPlease contain your excitement

John [email protected]

@johnleach

Brightbox Cloudwww.brightbox.com

VirtualisationVirtualisation

DockerDocker

Linux NamespacesLinux Namespaces

unshare commandunshare command

Mount NamespaceMount Namespace

Network NamespaceNetwork Namespace

Process NamespaceProcess Namespace

UTS NamespaceUTS Namespace

User NamespaceUser Namespace

IPC NamespaceIPC Namespace

cgroupscgroups

Namepaces + cgroupsNamepaces + cgroups

How can we bring this all together?

LXC – Linux ContainersLXC – Linux Containers

Docker vs. LXCDocker vs. LXC

What makes Docker different?

DockerDocker

Docker imagesDocker images

Docker Images: Layers Docker Images: Layers

511136ea3c5a

f3c84ac3a053

a1a958a24818

9fec74352904

d0955f21bf24

Container layer (a65ee08f6)

overlayfs

Hard linked together

Container layersContainer layers

docker commitdocker commit

docker commitdocker commit

docker savedocker save

DockerfileDockerfile

FROM ubuntu

RUN apt-get update -qqy

RUN apt-get install -qqy cowsay

ENV MESSAGE “nothing to say”

CMD sh -c "/usr/games/cowsay $MESSAGE"

docker pushdocker push

docker pulldocker pull

mysql imagemysql image

NetworkingNetworking

Service discoveryService discovery

Persistent storage with VolumesPersistent storage with Volumes

The unit of deploymentThe unit of deployment

The Future of DockerThe Future of Docker

DockerPlease contain your excitement

DockerPlease contain your excitement

John [email protected]

@johnleach

Brightbox Cloudwww.brightbox.com