introduction to docker
TRANSCRIPT
R.I.Pienaar
Malta DevOps September 2016
Introduction to Docker
R.I.Pienaar | [email protected] | http://devco.net | @ripienaar
Who am I?• Malta since December 2015
• Consultant for 20+ years
• Government, Finance, Health, Social Media, Fortune 50, Startups
• DevOps, Automation, Architect, Development
• Open Source @ github.com/ripienaar
• Linux since Kernel 99 alpha p11
R.I.Pienaar | [email protected] | http://devco.net | @ripienaar
Build
Store
RunDeploy
Monitor
Measure Discover
Manage
R.I.Pienaar | [email protected] | http://devco.net | @ripienaar
Building - Dockerfile
FROM ubuntu MAINTAINER R.I.Pienaar <[email protected]>
RUN apt-get -y update && \ apt-get -y install fortunes cowsay
CMD /usr/games/fortune -a | /usr/games/cowsay
R.I.Pienaar | [email protected] | http://devco.net | @ripienaar
Building - Dockerfile$ docker build —tag cowsay . Sending build context to Docker daemon 2.048 kB Step 1 : FROM ubuntu latest: Pulling from library/ubuntu … Step 2 : MAINTAINER R.I.Pienaar <[email protected]> ---> bfed29b12e38 Step 3 : RUN apt-get -y update && apt-get -y install fortunes cowsay ---> 84f9c78e6ea7 … Removing intermediate container e92ea7c080b6 Successfully built ddf94ac97d92
R.I.Pienaar | [email protected] | http://devco.net | @ripienaar
Running an Image
$ docker run —rm cowsay ________________________________________ / I'd rather just believe that it's done \ \ by little elves running around. / ---------------------------------------- \ ^__^ \ (oo)\_______ (__)\ )\/\ ||----w | || ||
R.I.Pienaar | [email protected] | http://devco.net | @ripienaar
Storing an Image
$ docker tag 0efcb77c2e86 quay.io/ripienaar/cowsay $ docker push quay.io/ripienaar/cowsay The push refers to a repository [quay.io/ripienaar/cowsay] 4d01acd487b1: Pushed 0cad5e07ba33: Pushed 48373480614b: Pushed 055757a19384: Pushed c6f2b330b60c: Pushed c8a75145fcc4: Pushed latest: digest: sha256:43adc5…155b8d0a195171 size: 7119
R.I.Pienaar | [email protected] | http://devco.net | @ripienaar
Inheriting from an ImageFROM quay.io/ripienaar/cowsay MAINTAINER R.I.Pienaar <[email protected]>
CMD /usr/games/fortune -a | /usr/games/cowsay -f /usr/share/cowsay/cows/tux.cow
$ docker build —tag quay.io/ripienaar/tuxsay . $ docker push quay.io/ripienaar/tuxsay
R.I.Pienaar | [email protected] | http://devco.net | @ripienaar
Running an Image$ docker run —rm quay.io/ripienaar/tuxsay ____________________________ < Steal this tagline. I did. > ---------------------------- \ \ .--. |o_o | |:_/ | // \ \ (| | ) /'\_ _/`\ \___)=(___/
R.I.Pienaar | [email protected] | http://devco.net | @ripienaar
Efficient ubuntu:latest
cowsay
MAINTAINER:
apt-get install
MAINTAINER:
tuxsay
86.7 MB
0 MB
R.I.Pienaar | [email protected] | http://devco.net | @ripienaar
Running - API
require “docker”
container = Docker::Container.create( “Image” => “quay.io/ripienaar/tuxsay” )
container.start puts container.attach container.stop container.delete
R.I.Pienaar | [email protected] | http://devco.net | @ripienaar
Running - API
$ ruby tuxsay.rb __________________ < I've Been Moved! > ------------------ \ \ .--. |o_o | |:_/ | // \ \ (| | ) /'\_ _/`\ \___)=(___/
R.I.Pienaar | [email protected] | http://devco.net | @ripienaar
Observing - APIrequire “docker”
Docker::Event.stream do |event| puts event end
Docker::Event { container create (image=quay.io/ripienaar/tuxsay, name=jovial_galileo) }
Docker::Event { container die (exitCode=0, image=quay.io/ripienaar/tuxsay, name=jovial_galileo) }
R.I.Pienaar | [email protected] | http://devco.net | @ripienaar
http://gliderlabs.com/registrator/
Demo
R.I.Pienaar | [email protected] | http://devco.net | @ripienaar
Linkshttp://docker.com/https://12factor.net/
http://label-schema.org/
https://github.com/ripienaar/mt_devops_sept2016
https://github.com/ripienaar/weather-demo
R.I.Pienaar | [email protected] | http://devco.net | @ripienaar
Questions?
twitter: @ripienaaremail: [email protected]: www.devco.net
github: ripienaarfreenode: Volcane
slack.puppet.com: ripienaar
https://www.devco.net/