Building images for Scaleway

while42 Paris #13 (14/04/14) - by @moul & @aimxhaisse 1

Who We Are» BareMetal SSD cloud

servers

» Compute C1

» 4 dedicated ARM cores

» 2GB memory

» 50GB SSD Disk

» 1 public IPv4 address

» 200Mbits/s unmetered

while42 Paris #13 (14/04/14) - by @moul & @aimxhaisse 2

Example of images» distrib images:

Ubuntu, Debian, Fedora, Arch Linux, Gentoo, Alpine Linux ...

» 1-Click apps: Docker, Wordpress, OwnCloud, Pydio, LEMP, Python, Node.js ...

while42 Paris #13 (14/04/14) - by @moul & @aimxhaisse 3

Our Needs» write/build/test/commit images

» Encourage contributions

while42 Paris #13 (14/04/14) - by @moul & @aimxhaisse 4

The Docker Way1.inherit from a

Docker imageFROM my-arm-image

2.customizeRUN apt-get install ...

3.convert it to a Scaleway image$ make build

while42 Paris #13 (14/04/14) - by @moul & @aimxhaisse 5

Hello World Dockerfile# Inherit from the Ubuntu Trusty Scaleway imageFROM armbuild/scw-distrib-ubuntu:trusty

# Install the `cowsay` packageRUN apt-get install -y -qq cowsay

# Add local assetsCOPY ./patches/ /

while42 Paris #13 (14/04/14) - by @moul & @aimxhaisse 6

Let's Build$ make build

» docker build, run, export

$ make image

» spawns a C1 instance, export tarball to the volume and snapshot

while42 Paris #13 (14/04/14) - by @moul & @aimxhaisse 7

Pros !can port existing images from community

sed -i 's/^FROM .*$/FROM armbuild/scw-distrib-ubuntu:trusty/' Dockerfile

while42 Paris #13 (14/04/14) - by @moul & @aimxhaisse 8

Pros !benefit from Docker/Dockerfile features

» inheritance: images apps are simple and concise

» caching: incrementally build images

» debug: drop a shell in the image thanks to docker run

» pull/push: sources

while42 Paris #13 (14/04/14) - by @moul & @aimxhaisse 9

Pros !easy to contribute

» Dockerfile is a known standard

» sources & issues are on GitHub

$ nano Dockerfile$ git commit -am 'Added cool feature. :neckbeard:'

while42 Paris #13 (14/04/14) - by @moul & @aimxhaisse 10

Cons» no official support of Docker on ARM

» some applications aren't ARM-ready

» no crossbuild

while42 Paris #13 (14/04/14) - by @moul & @aimxhaisse 11

Questions?scaleway.comgithub.com/scalewaytwitter.com/scaleway

{twitter,github}.com/moul m@42.am{twitter,github}.com/aimxhaisse mxs@sbrk.org

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