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1. Docker Introduction.pdf

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AmarGautam15

This document provides an introduction to Docker. It begins by explaining the differences between bare metal servers, virtualization, and containerization. It then discusses how Docker uses containerization to package applications with their dependencies in lightweight containers that can run on any infrastructure. Key Docker concepts covered include images, containers, and the Docker engine. The document also briefly outlines Docker's history and commercial editions.

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INTRODUCTION TO DOCKER
Agenda In this session, you will learn about: • Overview of Compute Service • Virtualization Vs Containerization • What is Docker? • Why Docker Containers? • Docker Terminologies • Docker Editions
Overview of Compute Service • Bare Metal Infrastructure • Virtualized Infrastructure • Containerized Infrastructure
Bare-Metal Servers • Bare-metal servers are 'physical' servers. Which is a single-tenant physical server.
Disadvantages of Bare-Metal Servers • One-App One-Server • More expensive (hardware level) • Mis-match of capacity • Expensive maintenance
What is Virtualization? • Virtualization is the technique of virtualizing the underlying Infrastructure, such as Memory, CPU, Storage… • Guest operating systems run on top of a Host operating system (Hypervisor). • We can run different flavors of operating systems in different virtual machines all running on the same Infrastructure. • Virtualization eliminates the need for extra hardware resource. Hardware (CPU,Memory,Disk I/O ,Network) Host Operating System (Tyep-2) Hypervisor (KVM, Hyper-V, VirtualBox, ESX/ESX-i) Guest Virtual Hardware 1 Guest Virtual Hardware 2 Guest Operating System 1 Guest Operating System 2 Application 1 Application 2 Virtual Machine 1 Virtual Machine 2 Bins/Libs Bins/Libs
Hypervisors • Hypervisor: A hypervisor allows one host computer to support multiple guest VMs by virtually sharing its resources, such as Memory, CPU and Storage. • Types of Hypervisor: • Type-1 Hypervisors – Runs directly on top of Hardware. • KVM, Xen, Hyper-V, ESX/ESXi… • Type-2 Hypervisors – Runs on top of Host OS. • Oracle VB, VMware Workstation…
Hypervisors… Guest OS VM Guest OS VM Hypervisor Hardware Type 1 Hypervisor (Bare-Metal Architecture) Guest OS VM Guest OS VM Hypervisor Hardware Host OS Type 2 Hypervisor (Hosted Architecture)
VMs are great, but they’re far from perfect! • Each guest OS will have its own kernel and set of libraries and dependencies. • Since each VM includes an OS and a virtual copy of all the hardware the OS requires, VMs require significant RAM and CPU resources. • VMs incur a lot of overhead beyond what is being consumed by your application logic. • Since each VM has its own dedicated OS, License cost is involved. • Patching, Upgrades, Security, Hardening requires larger team and time. • Boot up process is longer and takes more time.
Containerization • Containers are a method of operating system level virtualization. • Containers allow you to run an application and its dependencies in resource-isolated processes. • No guest OS overhead and utilizes a host’s operating system. • Containers share relevant OS libraries & resources as and when needed unlike virtual machines. • Containers are Lightweight and Faster than Virtual Machines. Hardware (CPU,Memory,Disk I/O ,Network) Host Operating System (Must) App1 App2 App3 C1 C2 C3 App4 C4 App5 C5 App6 C6 CRI ( Docker, containerd, CRI-O) Bins/Libs Bins/Libs Bins/Libs Bins/Libs Bins/Libs Bins/Libs
APP1 CONTAINER1 HOSTNAME IP ADDRESS DISK APP2 CONTAINER2 HOSTNAME IP ADDRESS DISK Operating System Computer What is Container? A container is the same idea as a physical container—think of it like a box with an application in it. Hostname IP Address Disk CPU Memory Docker Each Container has its own Computer Name, IP address and Disk …
Virtualization vs Containerization Hardware (CPU,Memory,Disk I/O ,Network) Host Operating System (Tyep-2) Hypervisor (KVM, Hyper-V, VirtualBox, ESX/ESX-i) Hardware (CPU,Memory,Disk I/O ,Network) Host Operating System (Must) CRI ( Docker, containerd, CRI-O) Guest Virtual Hardware 1 Guest Virtual Hardware 2 Guest Operating System 1 Guest Operating System 2 Application 1 Application 2 Virtual Machine 1 Virtual Machine 2 Bins/Libs Bins/Libs C4 C5 C6 App1 App2 App3 C1 C2 C3 App4 App5 App6 Bins/Libs Bins/Libs Bins/Libs Bins/Libs Bins/Libs Bins/Libs
Virtualization • Method of Hardware level Virtualization • Each VM needs dedicated Guest OS • Larger in size • Dedicated Kernel • Each VM will have its own Libraries and Binaries • Longer boot process • Takes more time for creating • Consumes more resources • Migrating virtualized application is challenging due to hardware incompatibility Containerization • Method of OS level Virtualization • Containers share host machine OS • Smaller in size • Share the Host kernel • Share relevant Libraries and Binaries • Shorter boot process • Takes Few seconds • Consume less resources • Migrating Containerized application is much easier
What is Docker? • Docker, Inc. – The company • Docker the technology • Docker is an open source platform for developing, shipping, and running applications. • Docker enables you to separate your applications from your infrastructure so you can deliver software quickly. • Docker manages the lifecycle of the container. • The use of containers to deploy applications is called containerization.
History of Docker Inc. • Developed using Linux core components, in 2013. • It was developed as an internal project at a platform-as-a-service company called dotCloud and later renamed as Docker.
APP1 Libraries APP1 Libraries Container 1 Container 2 Docker Engine Host OS Docker Terminologies • Runs Application within docker Container • Alternative to VMs & use host’s OS 3 Terminologies to remember • Docker image is build using dockerfile • Dockerfile contain all the application dependencies • Docker container is an instance of a docker image
Docker File Docker image Docker Container Docker Hub Staging Server Container Production Server Container Virtual Machine How Docker Works?
Docker Editions • Docker Community Edition (CE) is ideal for individual developers and small teams looking to get started with Docker and experimenting with container- based apps. • Docker Enterprise Edition (EE) is designed for enterprise development and IT teams who build, ship, and run business critical applications in production at scale. Renamed as MKE – Nov 2019

More Related Content

1. Docker Introduction.pdf

  • 2. Agenda In this session, you will learn about: • Overview of Compute Service • Virtualization Vs Containerization • What is Docker? • Why Docker Containers? • Docker Terminologies • Docker Editions
  • 3. Overview of Compute Service • Bare Metal Infrastructure • Virtualized Infrastructure • Containerized Infrastructure
  • 4. Bare-Metal Servers • Bare-metal servers are 'physical' servers. Which is a single-tenant physical server.
  • 5. Disadvantages of Bare-Metal Servers • One-App One-Server • More expensive (hardware level) • Mis-match of capacity • Expensive maintenance
  • 6. What is Virtualization? • Virtualization is the technique of virtualizing the underlying Infrastructure, such as Memory, CPU, Storage… • Guest operating systems run on top of a Host operating system (Hypervisor). • We can run different flavors of operating systems in different virtual machines all running on the same Infrastructure. • Virtualization eliminates the need for extra hardware resource. Hardware (CPU,Memory,Disk I/O ,Network) Host Operating System (Tyep-2) Hypervisor (KVM, Hyper-V, VirtualBox, ESX/ESX-i) Guest Virtual Hardware 1 Guest Virtual Hardware 2 Guest Operating System 1 Guest Operating System 2 Application 1 Application 2 Virtual Machine 1 Virtual Machine 2 Bins/Libs Bins/Libs
  • 7. Hypervisors • Hypervisor: A hypervisor allows one host computer to support multiple guest VMs by virtually sharing its resources, such as Memory, CPU and Storage. • Types of Hypervisor: • Type-1 Hypervisors – Runs directly on top of Hardware. • KVM, Xen, Hyper-V, ESX/ESXi… • Type-2 Hypervisors – Runs on top of Host OS. • Oracle VB, VMware Workstation…
  • 8. Hypervisors… Guest OS VM Guest OS VM Hypervisor Hardware Type 1 Hypervisor (Bare-Metal Architecture) Guest OS VM Guest OS VM Hypervisor Hardware Host OS Type 2 Hypervisor (Hosted Architecture)
  • 9. VMs are great, but they’re far from perfect! • Each guest OS will have its own kernel and set of libraries and dependencies. • Since each VM includes an OS and a virtual copy of all the hardware the OS requires, VMs require significant RAM and CPU resources. • VMs incur a lot of overhead beyond what is being consumed by your application logic. • Since each VM has its own dedicated OS, License cost is involved. • Patching, Upgrades, Security, Hardening requires larger team and time. • Boot up process is longer and takes more time.
  • 10. Containerization • Containers are a method of operating system level virtualization. • Containers allow you to run an application and its dependencies in resource-isolated processes. • No guest OS overhead and utilizes a host’s operating system. • Containers share relevant OS libraries & resources as and when needed unlike virtual machines. • Containers are Lightweight and Faster than Virtual Machines. Hardware (CPU,Memory,Disk I/O ,Network) Host Operating System (Must) App1 App2 App3 C1 C2 C3 App4 C4 App5 C5 App6 C6 CRI ( Docker, containerd, CRI-O) Bins/Libs Bins/Libs Bins/Libs Bins/Libs Bins/Libs Bins/Libs
  • 11. APP1 CONTAINER1 HOSTNAME IP ADDRESS DISK APP2 CONTAINER2 HOSTNAME IP ADDRESS DISK Operating System Computer What is Container? A container is the same idea as a physical container—think of it like a box with an application in it. Hostname IP Address Disk CPU Memory Docker Each Container has its own Computer Name, IP address and Disk …
  • 12. Virtualization vs Containerization Hardware (CPU,Memory,Disk I/O ,Network) Host Operating System (Tyep-2) Hypervisor (KVM, Hyper-V, VirtualBox, ESX/ESX-i) Hardware (CPU,Memory,Disk I/O ,Network) Host Operating System (Must) CRI ( Docker, containerd, CRI-O) Guest Virtual Hardware 1 Guest Virtual Hardware 2 Guest Operating System 1 Guest Operating System 2 Application 1 Application 2 Virtual Machine 1 Virtual Machine 2 Bins/Libs Bins/Libs C4 C5 C6 App1 App2 App3 C1 C2 C3 App4 App5 App6 Bins/Libs Bins/Libs Bins/Libs Bins/Libs Bins/Libs Bins/Libs
  • 13. Virtualization • Method of Hardware level Virtualization • Each VM needs dedicated Guest OS • Larger in size • Dedicated Kernel • Each VM will have its own Libraries and Binaries • Longer boot process • Takes more time for creating • Consumes more resources • Migrating virtualized application is challenging due to hardware incompatibility Containerization • Method of OS level Virtualization • Containers share host machine OS • Smaller in size • Share the Host kernel • Share relevant Libraries and Binaries • Shorter boot process • Takes Few seconds • Consume less resources • Migrating Containerized application is much easier
  • 14. What is Docker? • Docker, Inc. – The company • Docker the technology • Docker is an open source platform for developing, shipping, and running applications. • Docker enables you to separate your applications from your infrastructure so you can deliver software quickly. • Docker manages the lifecycle of the container. • The use of containers to deploy applications is called containerization.
  • 15. History of Docker Inc. • Developed using Linux core components, in 2013. • It was developed as an internal project at a platform-as-a-service company called dotCloud and later renamed as Docker.
  • 16. APP1 Libraries APP1 Libraries Container 1 Container 2 Docker Engine Host OS Docker Terminologies • Runs Application within docker Container • Alternative to VMs & use host’s OS 3 Terminologies to remember • Docker image is build using dockerfile • Dockerfile contain all the application dependencies • Docker container is an instance of a docker image
  • 18. Docker Editions • Docker Community Edition (CE) is ideal for individual developers and small teams looking to get started with Docker and experimenting with container- based apps. • Docker Enterprise Edition (EE) is designed for enterprise development and IT teams who build, ship, and run business critical applications in production at scale. Renamed as MKE – Nov 2019