This document provides an overview of Docker components and workflow. It discusses the Docker Engine, internal components including images, registries and containers, architecture involving the client and daemon, Dockerfiles for building images, and the common workflow of pulling, using, modifying, committing and pushing images. It also demonstrates Docker concepts like pushing/pulling to private registries and load balancing containers.

2. Agenda
Docker Engine(Daemon)
Docker internal components
Docker Architecture
Docker CLI
Dockerfile
Docker workflow
Docker Nginx+Tomcat

3. Docker high level picture

4. Docker Engine

5. Docker Engine

6. Docker Engine

7. Docker Engine

8. Docker Engine

9. Docker Engine

10. Docker internal components
To understand Docker, you need to know about its three
internal components. They are,
1. Docker image.
2. Docker registry.
3. Docker container.

11. Docker internal components
Docker image is like golden template(reuse). An image
consists of OS (RHEL, centos, Ubuntu etc.,) and applications
installed on it.

12. Docker internal components
Docker registry is repository for Docker images.

13. Docker internal components
container is more of directory and an execution environment
for applications.

14. Docker Architechure

15. Docker Client
The Docker client is what interacts with the docker daemon to
start or manage containers. Docker uses RESTful API to
communicate between the client and the daemon.

16. Dockerfile
Dockerfile is file written in Domain Specific Language
(DSL) that contains instructions on setting up Docker image.
Think of it as Makefile equivalent of Docker.

17. Docker CLI

18. Docker CLI

19. Docker workflow
Private & Confidential - 18 -
pull-use-modify-commit-push

20. Docker workflow
Private & Confidential - 19 -

21. Demo
Push/Pull
Docker private
registry
Pull to Deploy de2.docker.example.com
hub.docker.example.com
Developer
developer.docker.example.com
de1.docker.example.com

22. Demo
Load_balancing

23. Demo
Developer
Docker public
registry
Push/Pull
Pull
UAT
Production
Docker private
registry
Pull to Deploy

24. Thank You !