Docker containers anintroduction
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Khelender Sasan gives a presentation on Docker containers. He discusses the challenges facing the software industry with managing dependencies across different environments. He then introduces Docker as a technology that provides a standardized way to package applications and dependencies into containers. Sasan covers Docker's architecture, how it uses Linux containers and filesystems, and demonstrates Docker's usage. He also discusses partnerships with Microsoft, Google, Linux distributions and Docker's acquisitions.
Docker containers anintroduction
- 1. Docker Containers An Introduction (Khelender Sasan)
- 2. Page 2 © NEC Technologies India Limited 2014 Docker Containers : An Introduction Khelender Sasan Agenda ▌Background Software Industry Challenges VM versus Containers ▌Docker Technology Introduction Docker Architecture ▌Technology usage demonstration ▌Updates ▌References
- 3. Page 3 © NEC Technologies India Limited 2014 Docker Containers : An Introduction Khelender Sasan Challenge of Software Industry Source: http://www.slideshare.net/Docker/dockerintronovember- 131125185628phpapp02-37588934
- 4. Page 4 © NEC Technologies India Limited 2014 Docker Containers : An Introduction Khelender Sasan Dependency Hell (libraries / packages / ….) Static website Web frontend Background workers User DB Analytics DB Queue Development VM QA Server Single Prod Server Onsite Cluster Public Cloud Contributor’s laptop Customer Servers ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? Source: http://www.slideshare.net/Docker/dockerintronovember-131125185628phpapp02-37588934
- 5. Page 5 © NEC Technologies India Limited 2014 Docker Containers : An Introduction Khelender Sasan Cargo transport (pre-1960….) Source: http://www.slideshare.net/Docker/dockerintronovember-131125185628phpapp02-37588934 Multiplicity of Goods Multipilicity of methods for transporting/storing Do I worry about how goods interact (e.g. coffee beans next to spices) Can I transport quickly and smoothly (e.g. from boat to train to truck)
- 6. Page 6 © NEC Technologies India Limited 2014 Docker Containers : An Introduction Khelender Sasan Solution for Shipping Industry…. Source: http://www.slideshare.net/Docker/dockerintronovember-131125185628phpapp02-37588934 Multiplicity of Goods Multiplicity of methods for transporting/storing Do I worry about how goods interact (e.g. coffee beans next to spices) Can I transport quickly and smoothly (e.g. from boat to train to truck) …in between, can be loaded and unloaded, stacked, transported efficiently over long distances, and transferred from one mode of transport to another A standard container that is loaded with virtually any goods, and stays sealed until it reaches final delivery.
- 7. Page 7 © NEC Technologies India Limited 2014 Docker Containers : An Introduction Khelender Sasan Solution Source: http://www.slideshare.net/Docker/dockerintronovember- 131125185628phpapp02-37588934
- 8. Page 8 © NEC Technologies India Limited 2014 Docker Containers : An Introduction Khelender Sasan Solution for Software Industry…. Source: http://www.slideshare.net/Docker/dockerintronovember-131125185628phpapp02-37588934 Static website Web frontend Background workers User DB Analytics DB Queue Development VM QA Server Single Prod Server Onsite Cluster Public Cloud Contributor’s laptop Customer Servers
- 9. Page 9 © NEC Technologies India Limited 2014 Docker Containers : An Introduction Khelender Sasan Hypervisor VM versus Docker Containers •Includes hardware simulation & OS execution •Requires order of GB – 100s of MBs of memory for each instance (Heavy Weight) •Can simulate few VMs per server (Expensive) •Instance launch complete takes several seconds minute (slower) Virtual Machine (Hardware virtualization) •Based on Linux Containers and Union File System. •Requires order of few MBs of memory for each instance (Light Weight) •Can simulate much higher containers per server (Cheaper) •Instance launched in sub-second time- frame (much faster) Docker containers (OS level virtualization)
- 10. Page 10 © NEC Technologies India Limited 2014 Docker Containers : An Introduction Khelender Sasan Docker Technology : Introduction Traditional Hypervisor based VMs Container based Application execution Framework built on top of Linux containers that can package an application and its dependencies => Can be launched / deployed in form of software container on any Linux server (providing portability of underlying platform: cloud, bare-metal, server, desktop or laptop)
- 11. Page 11 © NEC Technologies India Limited 2014 Docker Containers : An Introduction Khelender Sasan Docker Technology Introduction….continued… Container relies on Linux kernel facilities: chroot, cgroups and name-space facilities that provide resource isolation (CPU, memory, block I/O, network, etc.) => Doesn’t require a separate OS instance. Docker provides framework & a high level API over Linux containers for portable deployment of applications across machines Docker provides versioning capability to track successive versions of a container Docker uses AUFS (Advanced multi-layered Unification File System) – It greatly enhances the performance of docker containers and provides for optimized usage of underlying disk resources
- 12. Page 12 © NEC Technologies India Limited 2014 Docker Containers : An Introduction Khelender Sasan Docker Architecture
- 13. Page 13 © NEC Technologies India Limited 2014 Docker Containers : An Introduction Khelender Sasan Usage Flow
- 14. Page 14 © NEC Technologies India Limited 2014 Docker Containers : An Introduction Khelender Sasan Technology Usage Demonstration (1/5) ▌Docker installation ▌Download an existing container image from public docker registry
- 15. Page 15 © NEC Technologies India Limited 2014 Docker Containers : An Introduction Khelender Sasan Technology Usage Demonstration (2/5) ▌Spawning container from downloaded container image ▌OS level virtualization demonstration
- 16. Page 16 © NEC Technologies India Limited 2014 Docker Containers : An Introduction Khelender Sasan Technology Usage Demonstration (3/5) ▌Concept of chroot and aufs ▌Setting up local private docker registry
- 17. Page 17 © NEC Technologies India Limited 2014 Docker Containers : An Introduction Khelender Sasan Technology Usage Demonstration (4/5) ▌Uploading images in local private docker registry
- 18. Page 18 © NEC Technologies India Limited 2014 Docker Containers : An Introduction Khelender Sasan Technology Usage Demonstration (5/5) ▌Versioning (Committing changes as new image)
- 19. Page 19 © NEC Technologies India Limited 2014 Docker Containers : An Introduction Khelender Sasan Docker Containers and technology business ecosystem ▌Microsoft & Docker Docker and Microsoft partner to bring container applications across platforms (15-Oct-2014) ▌Google & Docker Google Launches Managed Service For Running Docker- Based Applications On Its Cloud Platform (4-Nov-2014) Google Container Engine to use Kubernetes for providing “Docker as a Service” (“Cluster As a Service”?) ▌Linux Distros & Docker Canonical Releases Ubuntu 14.10 With Tighter Docker and Cloud Foundry Integrations (24-Oct-2014) SUSE bundles Docker and processor optimizations into major new Linux distro (27-Oct-2014) Red Hat To Bring Docker Support To Enterprise Linux And OpenShift (15-Apr-2014) ▌Docker acquisitions Docker acquires Orchard (for Orchestration & integration platforms) Docker Acquires Koality In Engineering Talent Grab (7- Oct-2014) ▌Server Environment Optimization (CoreOS) : Planning to serve a diet Linux Platform Every App / Service will be served using docker container !
- 20. Page 20 © NEC Technologies India Limited 2014 Docker Containers : An Introduction Khelender Sasan Solomon Hykes: person behind Docker Container ▌DotCloud : Provides Cloud solutions ▌Brain behind Docker : Solomon Hykes ▌Theme / Motto : “The real value of Docker is not technology, it's getting people to agree on something.” ▌Got inspiration of solution for software troubles from Shipping Industry ▌Nothing New => Just recipe was required ! Acknowledged all recipe ingredients in Docker Conf’14
- 21. Page 21 © NEC Technologies India Limited 2014 Docker Containers : An Introduction Khelender Sasan Questions? Thanks
- 22. Page 22 © NEC Technologies India Limited 2014 Docker Containers : An Introduction Khelender Sasan