The document outlines Docker, an open-source platform that enables the operating system-level virtualization of Linux systems through containers, allowing for efficient application deployment and management. It covers features such as namespaces, cgroups, and tools like Docker Compose and Docker Swarm for orchestrating and managing container architectures. Docker facilitates rapid software delivery, application portability, and resource efficiency, making it a vital tool for developers and sysadmins.

2. An operating system–level virtualization method for
running multiple isolated Linux systems (containers)
on a single control host.

3. • Namespaces
• (mnt, pid, net, ipc, uts/hostname, user ids)
• cgroups
• (cpu, memory, disk, i/o - resource management)
• AppArmor, SELinux
• (security/access control)
• seccomp
• (computation isolation)
• chroot
• (file system isolation)

5. • A platform for managing Linux Containers
• Began as an open-source implementation of the deployment engine which
powers dot Cloud
• Started in March, 2013
• Provided an easy to use API and powerful
• container image management features
• Attracted the community very fast
• Go programming language

6. • Platform to help code, test and deploy applications
• Open platform for developers and sysadmins to build, ship, and run
distributed applications.
• Light weight containers
• Available on most Linux distros
• Platform to help code, test and deploy applications

7. • Ship More Software Faster
• Minimal overhead/resource usage
• Run thousands of containers
• Easy to run your whole production stack locally
• Simply share your application with others
• Faster delivery of your applications
• Deploying and scaling more easily
• Fully Automated, EasyTo Deploy, Quickly Scale
• Run more apps on one host machine
• Application portability

8. •Bare metal: 8 to 24 Hours
•CloudVM: 5 to 10 Minutes
•Container: 5 to 15 Seconds

15. • Native installation for Linux
• DockerToolbox for Mac andWindows
• https://www.docker.com/toolbox
• All-in-one Docker installation
• Docker Engine
• Docker Machine
• Docker Compose
• Kitematic
• Docker Swarm

16. • The Docker Engine
• The Docker Client
• Docker Image
• Docker Registry
• Docker Containers

17. • Docker host, the computer running the Docker Engine.
• The daemon managing Docker images and containers.
• using namespaces and cgroups
• It runs on the (Linux-based) Host

18. The Docker client, in the form of the docker binary, is the primary user
interface to Docker. It accepts commands from the user and communicates
back and forth with a Docker daemon.

19. • Read only template used to create containers
• Build by you or other docker users
• Stored in the docker hub or you local registry
• Every image starts from base image

20. • Isolated application platform
• Containers everything needed to run you application
• Based on one or more images
• Docker containers launched from Docker image
• When Docker container runs, it adds a read-write layer on top of the image

21. • Docker Image is a class
• Docker Container is a instance of class

22. • Docker Compose: create and manage multi-container architectures
• Kitematic: Simple application for managing Docker containers on Mac and
Windows
• Docker Swarm: orchestrating tool to provision and schedule containers
• Docker Machine: provision hosts and install Docker on them
• Virtual Box:Virtualization software to run Docker host for Mac and
Windows

23. • Dockerfile is instructions to build Docker image
• How to run commands
• Add files or directories
• Create environment variables
• What process to run when launching container
• Result from building Dockerfile is Docker image

24. • Problems with standalone Docker Running a server cluster on a set of
Docker containers, on a single Docker host is vulnerable to single point of
failure!

25. • Native Clustering System
• Clustering (management) for Docker.
• Manage multiple Docker daemons.
• Distribute workloads.

26. • Tool for defining and running multi-container
• applications with Docker in a single file
• Fast, isolated development environments using Docker.
• Quick and easy to start.