Simple Virtual Hosts for Docker Containers

Small intro to Docker and why it works so well.

Presentation of a the Remote API to support virtual hosting your containers based on James Wilder's blog post: http://jasonwilder.com/blog/2014/03/25/automated-nginx-reverse-proxy-for-docker/

Demo files: https://gist.github.com/hmalphettes/dca6ca71effdb5ccd186
Presented at Singapore's Docker Meetup

Transcript

1. Virtual Hosts with Docker Hugues Malphettes hugues@stoic.com
2. What I Like to Do
3. Docker: what’s the problem?
4. Why I Love Docker? clean, _fast_, light weight
5. I heard this before Demo
6. How: LXC The Process Tree
7. How: LXC “Just” a new Process Ruby-On-Rails Root namespace Namespaced Child Process
8. How: The Union FS The KERNEL Ubuntu: “/“ “/usr/local/app1“ } 240 MB 60 MB One Instance: 300 MB
9. How: The Union FS The KERNEL Ubuntu: “/“ “/usr/local/app1“ The KERNEL Ubuntu: “/“ “/usr/local/app1“ Two Instances: 600 MB
10. How: The Union FS READ ONLY The KERNEL Ubuntu: “/“ “/usr/local/app1“ INSTANCE #1
 Write Layer INSTANCE #2
 Write Layer Two Instances: 300 MB
11. Infinite Number of Instances ! Perpetual Motion Engine
12. Virtual Hosts • The Cocktail Game where are introduced to: • A ruby-on-rails blog • A php DMS • An NGinx Reverse Proxy • A Dynamic DNS
13. It is Getting Cramped On a single machine
14. Dockerize • The Docker Daemon knows what IP is assigned to each container • Docker events: https://docs.docker.com/ reference/api/docker_remote_api/ • When containers start/stop, generate a Reverse Proxy
 config and 
 restart NGinx • Dynamic DNS based
 on the same idea
15. Demo
16. References • https://docs.docker.com/reference/api/ docker_remote_api/ • https://github.com/jwilder/nginx-proxy • https://github.com/hmalphettes/docker-route53- dyndns
17. Take Away • Plugging into the lifecycle of the docker containers • Other usage: monitoring. • … simple as long as everything is on the same host • IMO: wait a little longer for docker to natively support distributed systems.
18. Thanks You! Hugues Malphettes hugues@stoic.com