Introduction to Docker
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Introduction to Docker slide in Docker for DevOps and Continuous Delivery at OSS Festival 2014 Thailand
![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](https://image.slidesharecdn.com/lzovawt3inv3zrd3wiwk-signature-9938e69f19af16e60e6287f426e6bfcc4a34b3117d0d66e58dce64e93ec0b777-poli-141011044049-conversion-gate01/85/Introduction-to-Docker-26-320.jpg)
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Introduction to Docker
- 1. Introduction to Jirayut Nimsaeng (Dear) Docker for DevOps and Continuous Delivery Workshop October 11, 2014 @ OSS Festival 2014
- 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. 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. Developer Problems Developer Local Test QA Jirayut Nimsaeng Docker for DevOps and Continuous Delivery Workshop October 11, 2014 @ OSS Festival 2014 Production
- 5. What Developer needs Production-like Quick Repeatable Jirayut Nimsaeng Docker for DevOps and Continuous Delivery Workshop October 11, 2014 @ OSS Festival 2014
- 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. Infrastructure Problems Jirayut Nimsaeng Docker for DevOps and Continuous Delivery Workshop October 11, 2014 @ OSS Festival 2014
- 8. Shipping with container Jirayut Nimsaeng Docker for DevOps and Continuous Delivery Workshop October 11, 2014 @ OSS Festival 2014
- 9. Jirayut Nimsaeng Docker for DevOps and Continuous Delivery Workshop October 11, 2014 @ OSS Festival 2014 Docker can ● Deploy (almost) everything
- 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. 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. Jirayut Nimsaeng Docker for DevOps and Continuous Delivery Workshop October 11, 2014 @ OSS Festival 2014 In summary
- 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. 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. 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. 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. 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. 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. 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. Jirayut Nimsaeng Docker for DevOps and Continuous Delivery Workshop October 11, 2014 @ OSS Festival 2014 Docker image layers
- 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. 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. 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. 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. 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. 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. 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. Jirayut Nimsaeng Docker for DevOps and Continuous Delivery Workshop October 11, 2014 @ OSS Festival 2014 Docker Hub
- 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. 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. 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. 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. 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. Jirayut Nimsaeng Docker for DevOps and Continuous Delivery Workshop October 11, 2014 @ OSS Festival 2014 Docker Use Cases ● Docker for Continuous Delivery
- 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