Docker Presentation
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This document discusses Docker, an open-source container platform. It begins with a quick survey asking how familiar people are with Docker. It then defines Docker as allowing applications to be packaged into standardized units called containers that are portable and self-sufficient. The document outlines some benefits of containers like speed and small footprint. It compares containers to virtual machines and explains key components that enable containers like namespaces and control groups. Finally, it provides some basic Docker commands and examples of using Docker to package and run applications.
![July 14, 2014
Kaushal Kishore [ kaushal@osscube.com ]
Sr. Sofware Engineer [OSSCube]](https://image.slidesharecdn.com/dockerpresentation-140822061136-phpapp02/85/Docker-Presentation-1-320.jpg)
Docker Presentation
- 1. July 14, 2014 Kaushal Kishore [ [email protected] ] 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.
- 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
- 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 ?