Docker Presentation

1. July 14, 2014
Kaushal Kishore [ kaushal@osscube.com ]
Sr. Sofware Engineer [OSSCube]

2. Quick Survey

3. 2
Quick Survey
• How many people have heard of Docker before this Meetup ?
• How many people have tried Docker ?
• How many people are using Docker in production ?

4. What is Docker
?

5. 2
What is Docker ?
“Docker is an open-source engine to easily create
lightweight, portable, self-sufficient containers
from any application. The same container that a
developer builds and test on a laptop can run at
scale, in production, on VMs, OpenStack cluster,
public clouds and more.”

6. 2
Origin of Docker
• Docker is a rewrite of similar code that currently powers the
dotCloud PaaS
• Original version written in Python (like dotCloud PaaS), now
written in Go
• It’s a young project , but with a huge community.

7. Why Containers ?

8. 2
Cargo Transport Pre - 1960

9. 2
Intermodal Shipping Container

10. 2
Docker is a Code Shipping Container

11. build once,
run anywhere

12. configure once,
run anything

13. 2
Why Container ?
• Speed: Boots in seconds
• Footprint: 100-1000 containers on one machine. Small disk
requirements

14. 2
What is Container ?
“Containers are to
Virtual Machines as
threads are to
processes.”

15. 2
What is container in docker?
• LinuX Containers (LXC
• Kernel namespaces (ipc, uts, mount, pid, network and user)
• Chroots (using pivot_root)
• Apparmor and SELinux profiles
• Kernel capabilities
• Control groups (cgroups)
• AUFS or replacement in 0.7 version and later

16. 2
LinuX Containers (LCX)
• Let’s your run a Linux system within another Linux system
• A container is a group of processes on a Linux box, put together
is an isolated environment
• From the inside, it looks like a VM
• From the outside, it looks like normal processes

17. 2
Docker Engine

18. 2
Docker Vs Virtual Machine

19. 2
In the first 6 months
• 6000+ Github stars
• 150+ Contributors
• 50,000+ docker index pull
• 100’s of projects built on top of Docker
– UIs (DockerUI, Shipyard, Dockland...)
– Open Source PaaS (DEIS, Flynn, Dokku...)
– Continuous Deployment (Strider...)
• 1700’s Dockerized applications on Github

20. 2
Installations of Docker
“We can Install Docker on the listed platforms”

21. 2
Installations : Ubuntu Linux

22. 2
Installations : Binaries

23. 2
Installations : Vagrant

24. Basic Examples/
Commands

25. 2
Basic Commands

26. 2
Classic: “Hello World”

27. 2
Detached mode

28. 2
Containers Vs Images

29. 2
Containers Vs Images

30. 2
Public Index & Network

31. 2
Creating your 1st app: “The interactive way”

32. 2
Creating your 1st app: “The boring way ”

33. 2
Container Lifecycle
• docker run - creates a container.
• docker stop - stops it.
• docker start - will start it again.
• docker restart - restarts a container.
• docker rm - deletes a container.
• docker attach - will connect to a running container.
• docker wait - blocks until container stops.

34. 2
Container Info
• docker ps - shows running containers.
• docker ps -a - shows running and stopped containers.
• docker inspect - looks at all the info on a container (including IP
address).
• docker logs - gets logs from container.
• docker events - gets events from container.
• docker port - shows public facing port of container.
• docker top - shows running processes in container.

35. Questions ?

36. Thank you!
Email : kaushal@osscube.com