1.
Who I am?
• Robert Reiz
• Software Developer
• I started VersionEye
• Software Dev since 1998

2.
Started 2009 DevOps Days in Belgium

3.
DevOps is all about working together. About agile Infrastructure.
Youbuildit.Yourunit.Youtakeresponsibilityforit!

4.
Shipment
without
Containers

5.
1956 Malcom McLean introduced the 40’Container - ISO 668.
> 15 Million inst.
2/3
of global trade run
over 40’Containers!

6.
The Logistic Problem

7.
Same Problem in Software Dev.

8.
Java ? ? ?
Ruby ? ? ?
Node.JS ? ? ?
MySQL ? ? ?
Dev-Env. Test-Env. Prod-Env.

9.
Java JKD 1.8.14 - Win32 JKD 1.8.1 - Lnx-64 JDK 1.7-patch UNX
Ruby 2.2.2 rvm 2.2.1 nat MRI 2.1.0 rubinius
Node.JS 4.0 win 4.0 Linux 4.0 Linux
MySQL 5.5 win 5.0 Linux 5.0 Linux
Dev-Env. Test-Env. Prod-Env.

10.
Java .WAR / .EAR .WAR / .EAR .WAR / .EAR
Ruby GEM / GIT GEM / GIT GEM / GIT
Node.JS ZIP / GIT ZIP / GIT ZIP / GIT
MySQL .dmg .exe .dep
Dev-Env. Test-Env. Prod-Env.

11.
Java
Ruby
Node.JS
MySQL
Dev-Env. Test-Env. Prod-Env.

12.
What is Docker?

13.
What is Docker?
❖ Open Source Project started in March 2013
❖ From the makes of dotCloud (PaaS).
❖ Received $162 Million Funding.
❖ Community grows rapidly!

14.
What is Docker?
❖ Tiny VM (25 MB)
❖ Linux based - LXC Interface / libcontainer
❖ Own Namespaces and Cgroups!
❖ Shared resources with host system.
❖ It doesn’t work natively on Windows! Not yet!

15.
Build - Ship - Run
Docker-Hub
Build RUN
RUN
RUN
docker push
docker pull
Server Farm Production

16.
Build

17.
Dockerfile
FROM ubuntu:14.10
MAINTAINER Robert Reiz <reiz@versioneye.com>
ENV LANG en_US.UTF-8
RUN apt-get update
RUN apt-get install -y --force-yes -q nginx
ADD nginx.conf /etc/nginx/nginx.conf
CMD nginx
EXPOSE 80

18.
Build - Dockerfile
> docker build -t reiz/nginx:1.0.0 .
docker image => reiz/nginx:1.0.0

19.
Ship

20.
Ship Docker Image
> docker push reiz/nginx:1.0.0

21.
Run

22.
Fetch a Docker Image
> docker pull reiz/nginx:1.0.0
Download docker image reiz/nginx:1.0.0 from Docker Hub to local
Docker repository.

23.
Run a Docker Container
> docker run reiz/nginx:1.0.0
Creates a Docker container out of the Docker image reiz/nginx:1.0.0.
It runs the nginx process.

24.
More Commands
> docker stop <container_id>
> docker start <container_id>
> docker top <container_id>
> docker logs <container_id>
> docker rm <container_id>

25.
Important
❖ A Docker Container doesn’t store state!
❖ You can not ssh into a Docker Container!
❖ A container is supposed to run 1 process!

26.
Shell

27.
Get a Shell
> docker run -it reiz/mongodb:1.0.2 /bin/bash
Starts a new Docker container with an active shell.

28.
Get a Shell
> docker exec -it mongodb /bin/bash
Executes a command on a running contianer

29.
Volumes

30.
Mount a Volume
> docker run -v/mnt/mongodb:/data -d reiz/mongodb:1.0.2
Mounts “/mnt/mongodb” directory into the Docker container as “/data”.
Keep the data on the host. That’s how you keep data persisted.

31.
Environment Variables

32.
Set environment variables
> docker run --envLANG=en_US.UTF-8 -d reiz/mongodb:1.0.2
You can overwrite ENV variables from the Dockerfile here and also define
completely new ones.

33.
Links

34.
Link Docker Containers
> docker run —name mongodb -d versioneye/mongodb:1.0.2
> docker run —linkmongodb:mongo versioneye/api:1.0.0
MONGO_PORT=tcp://172.1.10.1:27017
MONGO_PORT_27017_TCP=tcp://172.1.10.1:27017
MONGO_PORT_27017_TCP_ADDR=172.1.10.1
MONGO_PORT_27017_TCP_PORT=27017
MONGO_PORT_27017_TCP_PROTO=tcp
Environmentvariablesareinjectedin2ndcontainer:

35.
DEMO

36.
Docker Compose
api:
image: versioneye/rails_api:2.5.7
ports:
- "9090:9090"
container_name: "api"
links:
- mongodb:db
- elasticsearch:es
mongodb:
image: reiz/mongodb:2.6.6_2
container_name: “mongodb"
elasticsearch:
image: reiz/elasticsearch:0.9.1
container_name: "elasticsearch"
docker-compose.yml
describes a whole
set of Docker
containers

37.
Docker Compose
> docker-compose up -d
> docker-compose ps
> docker-compose stop

38.
Docker Compose
> docker-compose build api
> docker-compose up --no-deps -d api
Updating a single container, not ALL of them.

39.
Docker Compose
> docker-compose scale worker=3
Scaling up containers

40.
DEMO

41.
Docker Machine
> docker-machine create --driver virtualbox dev
Docker Machine: create, manage and remote control
docker machines/hosts.
BETA

42.
Docker Machine
> docker-machine ls
> eval "$(docker-machine env dev)"
> docker ps

43.
DEMO

44.
Docker Swarm
DockerNode
DockerNode
DockerNode
DockerMaster
DockerSwarm
DockerClient
docker run
ServiceDiscovery
BETA

45.
Continuous Testing with Docker Containers

46.
Storage Driver
❖ AUFS
❖ devicemapper

47.
DON’TUSE
DEVICEMAPPER!

48.
Link Docker Containers
Linking only works on same hosts!

49.
Service Discovery

50.
Service Discovery
❖ Environment Variables
❖ Mount configuration via volumes
❖ Use a service like: etcd, zookeeper etc…

51.
Orchestration

52.
Docker Orchestration
❖ Docker Swarm
❖ CM-Tools (Chef, Puppet, Ansible, Salt)
❖ Kubernetes
❖ Mesos

53.
? ? ?
@RobertReiz
https://www.versioneye.com/go/docker:docker