Dockerizing development workflow

Dockerizing development workflow

• 1.
  Dockerizing development workflow ITRally 16 May2015 Orest Ivasiv Software engineer, Softserve Docker hobbyist
• 2.
  Outline 1. What isDocker? 2. Internals of Docker 3. Docker basic commands 4. Sample usage
• 3.
  History source Wikipedia Docker wasreleased as open source in March 2013
• 4.
  History February 2013: privaterepo, with liveral access (~200 people had access and helped to review, contribute, give feedback) March 2013: Docker 0.1 release at PyCon: - requires LXC, AUFS; - works on Debian/Ubuntu kernels June 2014: Docker 1.1, released at DockerCon May 12 2015: Docker 1.6.2, release 3 days ago
• 5.
  Docker Community 21500+ GithubStars 900+ Github Contributors ~50% of the commits are done by community
• 6.
  What is Docker? Dockeris an open source platform to automate development cycle of applications inside software containers. Build → ship → run any app, anywhere Build: package your application in a container Ship: move that container from a mashine to another Run: execite that container (i.e. your application) Any application: anything that runs on Linux Anywhere: local VM, cloud instance, bare metal, etc.
• 7.
  Docker Host OSrequirement Linux kernel 3.8+ Union file system - AUFS, btrfs, vfs or DeviceMapper
• 8.
  Docker vs VM Containersvs VMs. Diagram source: Docker Inc. There's a great StackOverflow answer showing the differences(http://stackoverflow.com/questions/16047306/how- is-docker-io-different-from-a-normal-virtual-machine)
• 9.
  Docker vs VM Startuptime is less for Docker than VMs (super fast) Docker images have much smaller size Snapshot process is faster in Docker than VMs Docker images have more portability Docker provides versioning of images Docker images do not have states Don't need SSH for access
• 10.
  Docker vs native Dockerhelps to avoid lib version conflicts Docker has no or minimal overhead while using resource for visualization
• 11.
  Docker Linux technologystack Docker can use different interfaces to access virtualization features of the Linux kernel. Diagram source: Docker Inc.
• 12.
  Docker architecture Docker Client DockerDaemon Docker Registry
• 13.
  Docker Internals Docker image(http://docs.docker.com/terms/image/) Dockerlayer(http://docs.docker.com/terms/layer/) Docker container(http://docs.docker.com/terms/container/) Docker repository(http://docs.docker.com/terms/repository/) Docker registry(http://docs.docker.com/terms/registry/)
• 14.
  Docker Layers
• 15.
  Docker Layers
• 16.
  Docker Layers
• 17.
  Docker Layers
• 18.
  Use cases 1. Dockerfor local application development and test Worksonmymachine→Worksagainonmymachinetomorrow→Worksonatestmachine 2. Docker for development team collaboration Worksonmymachine→Worksonyourmachine 3. Docker for continuous integration -Complicatedconfigurationofvarioustypesofbuildjobs(e.g.,Maven,GCCandJUnit) -Needforacleanenvironmentforthebuildortest,toeliminatepossiblecontaminants -ManagingthetotalexecutiontimeoftheCIworkflow 4. Docker for production application deployment Worksonmymachine→WorksonQAmachines→Works(thesame)onproductionhardware →Staysworking(securely)ontheproductionenvironment 5. Docker for creating a private PAAS
• 19.
  Docker vs Boot2Docker
• 20.
  Demo time
• 21.
  References Official Docker documentation(http://docs.docker.com/) DockerCheat Sheet(https://github.com/wsargent/docker-cheat-sheet) Docker Use cases - Article(http://blogs.gartner.com/richard-watson/ok-get-dockers-great/) Linux Containers(https://linuxcontainers.org/) Introduction to Docker, December 2014 "Tour de France" Bordeaux Special Edition, Jérôme Petazzoni(http://www.slideshare.net/jpetazzo/introduction-to-docker-december-2014-tour-de-france-bordeaux-special-edition) Official hosted registry https://hub.docker.com/(https://hub.docker.com/)
• 22.
  Thank you Orest Ivasiv Softwareengineer, Softserve Docker hobbyist halyph@gmail.com(mailto:halyph@gmail.com) http://halyph.com(http://halyph.com) @halyph(http://twitter.com/halyph)