Slide 1
Slide 1 text
Python Apps & Docker
@pygotham 2014
Slide 2
Slide 2 text
Matt Wright @mattupstate
Software/Ops Engineer @ChatID
● Python, Lua, CoffeeScript
● Flask, Prosody, Backbone, Angular
Open Source
● Author: Flask-Security, Flask-JWT, ...
● Contributor: Ansible, Flask
● Member: metaflask
Slide 3
Slide 3 text
What’s all the fuss about?
Slide 4
Slide 4 text
“... an open platform for developers
and sysadmins to build, ship, and run
distributed applications.”
http://docker.com/whatisdocker
Docker:
Slide 5
Slide 5 text
Images
A stateless, read-only collection of “layers”
joined together via a union filesystem.
Containers
A stateful instance of an image in which one
or more processes are running or have exited
Docker: Concepts
Slide 6
Slide 6 text
Docker: Components
Docker Engine
A portable, lightweight system level daemon
that manages images and containers
Docker Hub
A web service for distributing images and
enabling automated workflows
Slide 7
Slide 7 text
Docker Hub Server
Docker
Engine
Docker
CLI
Containers
Images
Docker: Birds Eye View
Repository
Images
Repository
Images
Repository
Images
Repository
Images
Slide 8
Slide 8 text
● Development Environments
● Application Deployment
● Continuous Integration
● Continuous Delivery
● Platform-as-a-Service (PaaS)
Docker: Use Cases
Slide 9
Slide 9 text
Tooling
Kubernetes
Marathon
maestro-ng
Shipyard
fig
Platforms
Elastic Beanstalk
CoreOS
flynn.io
deis.io
Docker: Landscape
SaaS
circleci.com
shippable.com
drone.io
quay.io
and many more (to come) ...
Slide 10
Slide 10 text
boot2docker
https://coderwall.com/p/fvfjyg
Slide 11
Slide 11 text
+
Slide 12
Slide 12 text
Development
Environments
Slide 13
Slide 13 text
● OS
● System libraries
● Python dependencies
● Database, cache, etc
Dev Env: Components
Slide 14
Slide 14 text
● Constantly change
● Never truly consistent
● Miscommunication (Ops vs. Devs)
● “Drift”
Dev Env: Problems
Slide 15
Slide 15 text
● README
● Stacks (LAMP, XAMP)
● Virtual Machines
● Vagrant + (Chef | Puppet | Ansible)
Dev Envs: Before
Slide 16
Slide 16 text
● Easy to change and share
● Always consistent
● 100% Isolated
● Single authority
● Production ready!
Dev Envs: Docker!
Slide 17
Slide 17 text
Dockerfile
Slide 18
Slide 18 text
Testing
Slide 19
Slide 19 text
Fig
$ pip install fig
Slide 20
Slide 20 text
Production
Ready
Slide 21
Slide 21 text
● Be skeptical of Docker dogma
● Keep secrets out of env vars
● Don’t use Docker for everything
● Design images carefully
Docker Tips
Slide 22
Slide 22 text
Thank You!
mattupstate.com
gittip.com/mattupstate
github.com/mattupstate
twitter.com/mattupstate