Docker provides a lightweight container platform that allows applications to run isolated on the same host machine. It uses a layered image format and central repository called Docker Hub to distribute container images. Containers are more portable and faster to deploy than virtual machines, though they have some limitations around networking and security compared to VMs. Tools like Kubernetes help manage Docker containers in production environments.

2. First Steps

3. What’s Docker?
• API to provide lightweight containers
• Opensource platform
• Run process isolated in the same host
• It helps to deploy, ship, test, etc. in a fast way

4. How it works

5. How it works

6. How it works
• Dockerfile: set of instructions to build a docker
image. Every instructions creates a new layer
and it is assigned to a hash, like a git commit
• Docker Hub: Central repository where docker
images are stored

7. Docker is NOT a Virtual Machine

8. Docker vs. Virtual Machines
Virtual Machine

9. Docker vs. Virtual Machines
Docker containers

10. Advantages
• High level abstraction for containers
• Fast to create images
• Fast to deploy
• Reduce time between development and
deployment
• Possible to have several environments isolated
in the same host

11. Example

12. So… Docker is AWESOME!!!!111

13. Well… Not that awesome…

14. Disadvantages
• Networking limitations
• No support for IPv6
• Uses NAT
• Insecure (Trust Docker Hub)
• No support for old kernels
• Not easy to debug
And more… http://www.boycottdocker.org

15. Docker in Production

16. Tools
• CoreOS, RancherOS, boot2docker
• Kubernetes
• Docker Machine
• Docker Compose
• Kitematic

17. Questions?

18. Thank you!
Julian Camargo
@juliancamargo
jcamargo2@gmail.com