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Introduction to Docker

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Introduction to Docker slide in Docker for DevOps and Continuous Delivery at OSS Festival 2014 Thailand

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Introduction to Docker

  1. 1. Introduction to Jirayut Nimsaeng (Dear) Docker for DevOps and Continuous Delivery Workshop October 11, 2014 @ OSS Festival 2014
  2. 2. Jirayut Nimsaeng Docker for DevOps and Continuous Delivery Workshop October 11, 2014 @ OSS Festival 2014 About me ● Jirayut Nimsaeng (Dear) ● Infrastructure Team Lead at Proteus Technologies ● Scrum Master ● Interested in Cloud and Open Source Technology
  3. 3. Jirayut Nimsaeng Docker for DevOps and Continuous Delivery Workshop October 11, 2014 @ OSS Festival 2014 Experienced? ● Use Vagrant ● Read and tried Docker online tutorial ● Install and run Docker locally ● Build Docker images ● Push Docker images to Docker Hub ● Written Dockerfile ● Deploy Docker images for dev/test/prod
  4. 4. Developer Problems Developer Local Test QA Jirayut Nimsaeng Docker for DevOps and Continuous Delivery Workshop October 11, 2014 @ OSS Festival 2014 Production
  5. 5. What Developer needs Production-like Quick Repeatable Jirayut Nimsaeng Docker for DevOps and Continuous Delivery Workshop October 11, 2014 @ OSS Festival 2014
  6. 6. Docker can solve this problem Developer Local Test QA Jirayut Nimsaeng Docker for DevOps and Continuous Delivery Workshop October 11, 2014 @ OSS Festival 2014 Production
  7. 7. Infrastructure Problems Jirayut Nimsaeng Docker for DevOps and Continuous Delivery Workshop October 11, 2014 @ OSS Festival 2014
  8. 8. Shipping with container Jirayut Nimsaeng Docker for DevOps and Continuous Delivery Workshop October 11, 2014 @ OSS Festival 2014
  9. 9. Jirayut Nimsaeng Docker for DevOps and Continuous Delivery Workshop October 11, 2014 @ OSS Festival 2014 Docker can ● Deploy (almost) everything
  10. 10. Jirayut Nimsaeng Docker for DevOps and Continuous Delivery Workshop October 11, 2014 @ OSS Festival 2014 Docker can ● Deploy (almost) everywhere Native On VMs
  11. 11. Jirayut Nimsaeng Docker for DevOps and Continuous Delivery Workshop October 11, 2014 @ OSS Festival 2014 Docker can ● Deploy reliably & consistently ● Everything will be exactly the same – Distros – Versions – Dependencies ● If it works locally, it will work everywhere
  12. 12. Jirayut Nimsaeng Docker for DevOps and Continuous Delivery Workshop October 11, 2014 @ OSS Festival 2014 In summary
  13. 13. Jirayut Nimsaeng Docker for DevOps and Continuous Delivery Workshop October 11, 2014 @ OSS Festival 2014 Docker can ● Deploy efficiently – Laptop can run 10-100 containers easily – Server can run 10-1000 containers ● Containers can run at native speeds – http://www.slideshare.net/BodenRussell/kvm-and-docker- lxc-benchmarking-with-openstack
  14. 14. Docker CPU benchmark Docker / KVM: Compute Node Steady-State CPU (Segment Overlay) Jirayut Nimsaeng Docker for DevOps and Continuous Delivery Workshop October 11, 2014 @ OSS Festival 2014 14 12 10 8 6 4 2 0 docker-usr docker-sys kvm-usr kvm-sys Time: KVM(95s - 307s) Docker(31s – 243s) CPU Usage In Percent Docker Averages – 0.2 – 0.03 KVM Averages – 1.91 – 0.36
  15. 15. Docker Memory benchmark Jirayut Nimsaeng Docker for DevOps and Continuous Delivery Workshop October 11, 2014 @ OSS Festival 2014 7.00E+09 6.00E+09 5.00E+09 4.00E+09 3.00E+09 2.00E+09 1.00E+09 0.00E+00 Docker / KVM: Compute Node Used Memory (Overlay) kvm docker Axis Title Memory Used
  16. 16. Docker Memory benchmark MEMCPY DUMB MCBLOCK Jirayut Nimsaeng Docker for DevOps and Continuous Delivery Workshop October 11, 2014 @ OSS Festival 2014 14000 12000 10000 8000 6000 4000 2000 0 3823.3 4393.3 12881.61 3813.38 4395.92 12905.68 3428.95 3461.59 7223.23 Memory Benchmark Performance Bare Metal (MiB/s) docker (MiB/s) KVM (MiB/s) Memory Test MiB/s
  17. 17. Docker I/O benchmark Sysbench Synchronous File I/O Random Read/Write @ R/W Ratio of 1.50 1 2 4 8 16 32 64 Jirayut Nimsaeng Docker for DevOps and Continuous Delivery Workshop October 11, 2014 @ OSS Festival 2014 1600 1400 1200 1000 800 600 400 200 0 docker KVM Threads Total Transferred In Kb/sec
  18. 18. Jirayut Nimsaeng Docker for DevOps and Continuous Delivery Workshop October 11, 2014 @ OSS Festival 2014 What is Docker? ● Platform to help code, test and deploy applications ● Combine with – Lightweight container virtualization – Work flows – Tooling
  19. 19. Jirayut Nimsaeng Docker for DevOps and Continuous Delivery Workshop October 11, 2014 @ OSS Festival 2014 Docker image ● Docker images are read-only templates ● Each image consists of series of layers ● Docker use union file system to combine layers into single image ● Every image starts from base image
  20. 20. Jirayut Nimsaeng Docker for DevOps and Continuous Delivery Workshop October 11, 2014 @ OSS Festival 2014 Docker image layers
  21. 21. Jirayut Nimsaeng Docker for DevOps and Continuous Delivery Workshop October 11, 2014 @ OSS Festival 2014 Docker container ● Docker containers launched from Docker image ● Container consists of – Operating system – User-added files – Meta-data ● When Docker container runs, it adds a read-write layer on top of the image
  22. 22. Containers vs. VMs App A2 Hypervisor Host OS App B1 Jirayut Nimsaeng Containers are isolated, but share OS and, where appropriate, bins/libraries Bins/Libs Bins/Libs Host OS Docker for DevOps and Continuous Delivery Workshop October 11, 2014 @ OSS Festival 2014 Server App A1 Guest OS Guest OS Guest OS Bins/ Libs Bins/ Libs Bins/ Libs VM Server App A1 App A2 App B1 App B2 App B3 Docker daemon Container
  23. 23. Containers more lightweight VMs Containers App B1 Jirayut Nimsaeng Docker for DevOps and Continuous Delivery Workshop October 11, 2014 @ OSS Festival 2014 App A1 Guest OS App A2 Guest OS Guest OS Bins/ Libs Bins/ Libs Bins/ Libs App A1 App A2 Δ App A1 App A2 Modified App Bins/ Libs Base
  24. 24. Docker container concept App D2 App E Prod App B MySQL PHP App E Demo Python AAppaacchhee Host OS (CoreOS) App D1 Jirayut Nimsaeng Docker for DevOps and Continuous Delivery Workshop October 11, 2014 @ OSS Festival 2014 Kernel Docker driver, aufs/btrfs App A1 App A2 App B Demo App B Prod MySQL PHP Ubuntu base Bins/Libs Docker daemon Busybox base bins/libs Python Apache Data Container for App A1 App B CentOS base Bins/Libs Data Container for App A2 Data Container for App B Prod Data Container for App C App C App F Docker Base Image Docker Image Docker Container
  25. 25. Jirayut Nimsaeng Docker for DevOps and Continuous Delivery Workshop October 11, 2014 @ OSS Festival 2014 Dockerfile ● Dockerfile is instructions to build Docker image – How to run commands – Add files or directories – Create environment variables – What process to run when launching container ● When build Dockerfile, new Docker image will return as a result ● Or we can call result from building Dockerfile is new base Docker image
  26. 26. Jirayut Nimsaeng Docker for DevOps and Continuous Delivery Workshop October 11, 2014 @ OSS Festival 2014 Sample Dockerfile FROM base MAINTAINER Jirayut Nimsaeng <w [at] winginfotech.net> ADD build-files /build-files RUN apt-get update RUN apt-get install -y openssh-server vim tmux rsync byobu RUN mkdir /var/run/sshd RUN sed -i 's/required pam_loginuid.so/optional pam_loginuid.so/g' /etc/pam.d/sshd CMD /start.sh EXPOSE 22
  27. 27. Jirayut Nimsaeng Docker for DevOps and Continuous Delivery Workshop October 11, 2014 @ OSS Festival 2014 Docker Registry ● Docker Registry is the store for Docker image ● Docker Hub is public Docker Registry like Github ● Using Docker client to push and pull Docker image from Docker Registry ● You can create your own Docker Registry
  28. 28. Jirayut Nimsaeng Docker for DevOps and Continuous Delivery Workshop October 11, 2014 @ OSS Festival 2014 Docker Hub
  29. 29. Commit Change Jirayut Nimsaeng App A2 Container App A App A Image Docker for DevOps and Continuous Delivery Workshop October 11, 2014 @ OSS Festival 2014 Docker life cycle App A Docker Container Docker Registry Commit Push Host App A1 Container Pull Docker Engine Ubuntu Base Docker Apache Docker Container Apache Bins/Libs Apache + PHP Docker Image Bins/Libs Apache App A ΔΔ Change App A Apache Bins/Libs App A Docker image
  30. 30. App A Image App A Docker Engine Jirayut Nimsaeng Image App A Docker for DevOps and Continuous Delivery Workshop October 11, 2014 @ OSS Festival 2014 Docker workflows Dockerfile For App A Host 1 (Dev/Build Server) Docker Registry Host 2 (Container Server) 1.Build 2.Push 3.Pull 4.Run Docker Engine Container App A Production
  31. 31. 2022 2035 2035 Jirayut Nimsaeng 80 Docker for DevOps and Continuous Delivery Workshop October 11, 2014 @ OSS Festival 2014 Docker Use Cases ● Docker as Development Environment Host Virtualbox VM 22 SSH Docker Daemon Web Server boot2docker-vm 80 1024+ Docker Containers Database Host-only 80
  32. 32. Bins/Libs Bins/Libs Jirayut Nimsaeng Docker for DevOps and Continuous Delivery Workshop October 11, 2014 @ OSS Festival 2014 Docker Use Cases ● Docker as Infrastructure as a Service Host OS Server App A App A~ App B App B~ App B~~ Docker daemon
  33. 33. Jirayut Nimsaeng Docker for DevOps and Continuous Delivery Workshop October 11, 2014 @ OSS Festival 2014 Docker Use Cases ● Docker as Platform as a Service
  34. 34. Jirayut Nimsaeng Docker for DevOps and Continuous Delivery Workshop October 11, 2014 @ OSS Festival 2014 Docker Use Cases ● Docker for Continuous Delivery
  35. 35. Continuous Delivery with Docker Repository Server 5.Get Wordpress Code Jirayut Nimsaeng MySQL Data Image Docker for DevOps and Continuous Delivery Workshop October 11, 2014 @ OSS Festival 2014 MySQL Dockerfile Data MySQL Data Image Docker Engine Host 1 (Dev/Build Server) Docker Registry Host 2 (Container Server) 1.Build 3.Push 7.Pull 8.Run Docker Engine Container MySQL Data Backup Server 2.Get DB Backup Wordpress 4.Build Dockerfile Wordpress Image 6.Push Wordpress Image Container Wordpress

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