Introduction to Docker | Docker and Kubernetes Training
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The document provides an overview of Docker and its components, focusing on its benefits and functionalities in containerized applications. It highlights the differences between containers and virtual machines, outlines Docker basics such as images, containers, and registries, and discusses its relevance in application development and deployment. Additionally, it emphasizes Docker's support for various operating systems, cost savings, and efficiency in application lifecycle management.
Introduction to Docker | Docker and Kubernetes Training
- 1. For Docker Online Training : +91-999 123 502 Introduction to Docker Shailendra Chauhan Microsoft MVP, Technical Consultant and Corporate Trainer
- 2. For Docker Online Training : +91-999 123 502 • Multi-Dimensional Evolution of Computing • What is Container? • Container Platforms • Why Containers? • Virtual Machines vs Containers • Containers and VMs together • Docker Basics • Docker for .NET Applications • Docker Engine Architecture Agenda
- 3. For Docker Online Training : +91-999 123 502 Evolution of Computing
- 4. For Docker Online Training : +91-999 123 502 • A container is a software that contains an application code and all its dependencies. • Enables an application to run quickly in an isolated environment. • Provide smooth migration from one computing environment to another. • Share the same OS kernel • Works with all major Linux & Windows Server What is Container? Source : www.docker.com
- 5. For Docker Online Training : +91-999 123 502 Container Platforms Linux Containers (LXC) Docker (Docker Swarm) Kubernetes RedHat OpenShift DC/OS
- 6. For Docker Online Training : +91-999 123 502 • Quickly create ready-to-run packaged applications, low cost deployment • Automate testing, integration and packaging • Reduce/eliminate platform compatibility issues • Supports microservices development Why Containers? • Improve speed and frequency of releases, reliability of deployments • Makes app lifecycle efficient, consistent and repeatable-configure once, run many times • Eliminate environment inconsistencies between dev, test, and production • Provide Scalability on demand For Developers For Administrator
- 7. For Docker Online Training : +91-999 123 502 Virtual Machines vs. Containers VMs Source : www.docker.com Containers Source : www.docker.com
- 8. For Docker Online Training : +91-999 123 502 • Hardware-level virtualization • Fully isolated • Isolated OS • Having its own kernel • Slower in start-up • Many startup process • Upfront resource allocation Virtual Machine vs. Containers • OS-level virtualization • Process-level isolation • Isolated processes/filesystems • Host machine kernel is used • Faster in start-up • Single Start-up process • No upfront resource allocation
- 9. For Docker Online Training : +91-999 123 502 Containers and VMs together Source : www.docker.com
- 10. For Docker Online Training : +91-999 123 502 • A light weight, open and secure platform for developing, shipping and running applications using container technology. • Provides Container solutions for developers, architects, DevOps, and IT People. • Run on most Linux distributions, Windows and Mac OS. • Supported by most of cloud providers like AWS, Azure, Google etc. • Provide Dev/Test, CI and DevOps platform for many use cases. Introduction to Docker
- 11. For Docker Online Training : +91-999 123 502 • Infrastructure Cost Savings • Standardization and Productivity • Isolation • Security • Makes app lifecycle efficient and consistent • Continuous Deployment and Testing • On Demand Scaling • Multi-Cloud Platforms Support Docker Benefits
- 12. For Docker Online Training : +91-999 123 502 Docker Desktop • An application for Mac and Windows to build production-ready container applications • Enables to build and test Linux & Windows based applications at local machine • Available in two editions: • Desktop Community • Desktop Enterprise
- 13. For Docker Online Training : +91-999 123 502 Docker For Developers Applications (.NET Core, Java, JS etc.) Windows Server Linux
- 14. For Docker Online Training : +91-999 123 502 Docker For .NET Applications .NET Core Windows Nano Server Linux .NET 3.5 & .NET 4.x Windows Server Core Legacy Applications
- 15. For Docker Online Training : +91-999 123 502 • Docker File • Docker Image • Docker Container • Docker Registry Docker Basics
- 16. For Docker Online Training : +91-999 123 502 Docker File Dockerfile docker build • A simple text file that contains commands to build a docker image. • This file doesn’t have any extension.
- 17. For Docker Online Training : +91-999 123 502 • A lightweight, standalone and executable package of software. • Includes everything which is needed to run an application like code, runtime, system tools, system libraries and settings. • An image is stack of multiple read only layers referencing another images. • Created by docker build command. • Stored in Docker registry (eg. Docker Hub). Docker Image Image = Layered File System Base Image (Ubuntu) .NET Core SDK …
- 18. For Docker Online Training : +91-999 123 502 • Container is an running instance of a docker image • An isolated and secured shipping container • Run by docker run command Docker Container Operating System Software Application Code docker run
- 19. For Docker Online Training : +91-999 123 502 • A Service to host Docker images • Multiple options are available: • Docker Hub - (Free for public images and Paid for private images) • Docker Trusted Registry - (on-prem or on-cloud) Docker Registry Docker Registry docker push docker pull
- 20. For Docker Online Training : +91-999 123 502 Docker Container Life Cycle Run Dockerfile Build Docker Registry Pull Push Stop Start Restart Docker Local Instance Commit
- 21. For Docker Online Training : +91-999 123 502 • A runtime to build and run container based applications which can run anywhere consistently on any infrastructure. • Runs on various Linux (CentOS, Debian, Fedora, Oracle Linux, RHEL, SUSE, and Ubuntu) and Windows Server OS. • Provides built in orchestration, container networking, out of the box security, volume and plugins. Docker Engine
- 22. For Docker Online Training : +91-999 123 502 Server Daemon Docker Engine Architecture Volumes Images Networks Plugins R E S T A P I Docker CLI Docker Engine Containers