introduction to containers and docker

BADCamp 2015DevOps Summit

Introduction to Containers and Docker

@RobLoach

Kalamuna.

I build tools to bring great ideas into reality.

RobLoach

RobLoach

rob@kalamuna.com

Rob Loach

About UsKalamuna makes the Internet for rabble-rousing organizations driven to tinker, critique, and change the way things are. We specialize in design, strategy, user experience, and development.

Containers

But first….

Why?

I can build environments!

But after a while...

B

“Matrix From Hell”

“Matrix From Hell”

“Matrix From Hell”

Managing and DeployingCode is Hard

Virtualization?

■ VirtualBox

■ VMWare

■ Vagrant

■ Puppet

■ Chef

■ etc

AWESOME!.... Buuuuuuuut

■ Slow performance

■ Images require a lot of space

■ Can be complex to set up

■ Updating takes forever

Containers!

Containers

■ Single-service provider■ Build once, run everywhere■ Re-usable software components■ Bind and link services■ Improve dependency management■ Natively part of Linux runtime■ Shared Kernal-space

Docker

■ Easy to use interface around Containers

■ Single “Dockerfile” configuration■ “Hub” to share environments■ Runs everywhere

Create a Container for each Service

Ship each individual Container

Fixes “Matrix From Hell”

Great Scott!

But how?

1. Install Docker

http://docker.io

2. Create a Dockerfile

FROM UbuntuRUN apt-get install nginxADD . /webEXPOSE 80

3. Build the Image

docker build -t myapp .

4. Run it!

docker run -d -p 80:80 myapp

GIVE ME MORE!

■ Docker Compose

■ Orchestrate and link up a set of containers

■ Docker Swarm

■ Clustering of Docker containers, allowing creation and access to a pool of hosts

■ Docker Hub

■ Registry of Docker containers and images - Privately or Publicly

5. Link Containers with Docker Compose

web: build: . ports: - "80:80" links: - mysqlmysql: image: mysql

6. Share on Docker Hub

KalaBox

Drupal development environment through Docker containers

Thank You!

www.kalamuna.comrob@kalamuna.comhttp://robloach.net

@RobLoach