This document provides an introduction to Docker, including its fundamentals, tools, and ecosystem. It discusses what containers and Docker are, important concepts like immutability and portability, and tools for installing Docker, managing images with Docker Hub and Dockerfiles, networking containers, defining multi-container apps with docker-compose, and clustering hosts with docker-swarm. The presentation aims to help attendees understand and get started with Docker.

1. Introduction to
Docker
Build, run and scale

2. About Me
● Vincent Sellier
○ @vsellier
● Operations manager at eXo

3. Agenda
Enjoy...
1. Docker fundamentals
2. Tools and Ecosystem
And demos

4. Docker
fundamentals

5. What is a container ?

6. What is Docker ?
● The docker engine is a wrapper for :
○ Namespaces
○ cgroups
○ Union file systems
● Hide the underlying complexity

7. Union filesystem
Layer 1
Layer 2
Layer 3
Layer 4
Layer 5
Active layer
Read
Write

8. 3 important concepts
1. Immutability
2. Rapidity
3. Portability

9. Docker trends

10. Docker
Tools

11. Installation
● Supported by all recent linux distros
○ Package managers
○ One line installer
○ CoreOs : Fully docker oriented distros
● Supported on Mac and Windows

12. docker-machine
● Provision and configure docker hosts
● almost 15 supported drivers
○ VirtualBox
○ AWS
○ GoogleCloud
○ Microsoft Azure
○ VMware vSphere
○ OpenStack
○ ...

13. Docker Hub
● Online service maintained by Docker inc
● Image repository with versioning
● Content trust
● Public / Private spaces
● A private registry is available

14. The Dockerfile
● Simple DSL to extend images
○ Configure the base image
○ Update the content
○ Configure the startup behavior
● Each instruction results in one images layer

15. Data volumes
● Special directories excluded from the Union File System
● Persistents
● Sharable between containers

16. Networking and container links
● bind ports on docker hosts
● link two containers or more
○ Configure the network
○ Create an alias in the hosts file
○ Inherit ENV instructions from the source container
○ Support restart

17. docker-compose
● Define multi-container applications in one file
● Manage container dependencies
● Can build images
● Scale applications

18. docker-swarm
● Docker clustering
● Transparent for docker tools
● Host selector
● Support the new 1.9 docker network feature

19. docker-swarm
docker
docker-compose
swarm-master
discovery
service
docker host
docker host
docker host
docker host

20. Questions ?

21. Thanks