This document discusses containers and Docker. It begins with an overview of hypervisors and how containers provide the benefits of virtualization without hypervisor overhead. It then defines containers and how Docker is an open-source container technology built on Linux containers. The rest of the document defines Docker terminology and provides examples of Docker use cases like CI/CD and DevOps. It concludes with an agenda item for a demo and discussion.

1. Gökhan Çamaş
11.05.2016

2. AGENDA
• Hypervisors
• What Are Containers?
• What Is Docker?
• Use Cases
• Demo

3. HYPERVISORS
Each OS
• Uses CPU
• Uses RAM
• Uses Disk
• May have license cost
• Requires admin time

4. WHAT ARE CONTAINERS?
• No OS Overhead
• No Extra license cost
for each OS and other
Apps
• Maintain single OS

5. WHAT ARE CONTAINERS?
Hypervisor Architecture Container Architecture

6. DOCKER
• Open Source Container Technology
released in 2013 from dotcloud.com
• Built on top of LXC (Linux Containers)
• Relies on Linux Kernel Features
• Beta for Windows and Mac OS now

7. DOCKER

8. DOCKER TERMINOLOGY
• Docker engine: The process running on your production machine that sits between your running Docker
application and the underlying operating system and hardware.
• Dockerfile: A text file that contains the instructions (or commands) used to build a Docker image.
• Docker image: The result of building a Dockerfile and executing the Dockerfile's commands. It is
constructed from a root operating system, installed applications, and commands executed in such a way
that it can run your application. A Docker image serves as the basis for Docker containers and is the static
template from which they are created.
• Docker container: A runtime instance of a Docker image. Whereas the Docker image is like a template
(built from a Dockerfile that contains the correct operating system, applications, and commands used to
build the image), the container is an actual running instance of that image.
• Docker host: A physical or virtual machine that runs the Docker engine to host your Docker container's
DockerHub.
• DockerHub: The repository that hosts Docker images. Think of a DockerHub being to Docker images
what GitHub is to Git repositories: a central location for hosting and serving up Docker images.

9. USE CASES
• CI/CD
• DevOps
• Infrastructure Optimisation
• Big Data

10. DEMO & DISCUSSIONS