The document discusses building reusable development environments using Docker. It provides an overview of Docker tools like Docker Machine for provisioning Docker hosts, Docker Engine for running containers, Docker Registry for storing images, and Docker Compose for defining multi-container apps. It demonstrates how to create containers from Dockerfiles, run commands, organize containers and images, and set up a basic Java app using Docker and Maven plugins. The document aims to explain the core Docker concepts and show how to use common Docker commands.

1. Building Reusable Development
Environments with Docker
Harold Dost
Raastech, Inc.
CC BY 3.0 US, Harold A. Dost III 1

2. About the Speaker
Work For Raastech, Inc. -
Virginia/DC Area 1
1
Image source: https://upload.wikimedia.org/wikipedia/
commons/d/d2/USNavy030926-
F-2828D-307AerialviewoftheWashingtonMonument.jpg
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3. Live in Michigan2
• Detroit Metro Area
2
Images Source: Wikipedia
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4. Core Java
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5. Shameless Plug
• For SOA Administration
• Buy From Packt Website
• Promo Code for 50% off:
UKOUG50
• Valid until Dec 15, 2016
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6. Lately
• Primarily working as Lead QA for Client
creating IoT devices
• Part of the Release team
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7. Typical Steps
1.Setup Database
2.Create Schemas
3.Setup Server
4.Deploy Application
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8. Basic Java App
[Kinda] Demo
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9. Code Quality 3
3
Image Source: http://xkcd.com/1695/
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10. Consistency 4
• Vagrant
• Chef
• Puppet
• Ansible
4
Image Source: https://www.flickr.com/photos/cadsonline/
889810973
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11. Docker
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12. Docker
Ecosystem
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13. Tools
• Docker Machine
• Docker Engine
• Docker Registry
• Docker Compose
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14. Using Docker
Machine
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15. Docker Machine
• This aids in creating docker hosts
• The target of these can be:
• Cloud Providers
• AWS
• Digital Ocean
• Google Cloud Platform
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16. Docker Machine cont.
• Other VM Targets
• OpenStack
• Oracle VirtualBox
• VMware Fusion®
• vCloud® Air™
• vSphere®
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17. Docker Machine
Creates a dummy machine
docker-machine create --driver virtualbox default
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18. Docker Engine
• Basis of Eco-system
• Mediate between containers
and host
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19. Benefits
• Lightweight
• Walled off from other process
• Repeatable
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20. Definitions
• Images
• VM
• Docker
• Container
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21. How does Docker work?
• LXC -> libcontainer5
• Control Groups: Limit Resources of Process
Groups
• Kernel Namespaces: Isolates resources
5
http://www.zdnet.com/article/docker-libcontainer-unifies-linux-container-powers/
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22. Difference between Containers
and VMs 6
6
Image Source: http://www.docker.com/what-docker
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23. Limitations - Linux
• Linux Kernel Based OS (Ubuntu, CentOS, Arch,
Etc.)
• Minimum of Kernel 3.10
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24. Limitations - Windows Host
• Microsoft Windows Server 2016
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25. Windows Specific Containers
• Windows Server Containers
• Hyper-V Containers
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26. Dockerfile 7
FROM java:8
RUN apt-get update
RUN apt-get install -y maven nodejs
EXPOSE 9000
WORKDIR /app
COPY app /app
RUN chown -R appuser /app
USER appuser
ENTRYPOINT mvn spring-boot:run
7
For more information about the Dockerfile format check here.
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27. Using Docker Engine
• 39 Different commands
• Only covering some of the most used
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28. Commands: Retrieve
pull - Pull an image or a repository from a
registry
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29. Commands: Create and Delete
create - Create a new container
rm - Remove one or more containers
rmi - Remove one or more images
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30. Demo Commands
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31. Commands: Start and Stop
start - Start 1+ stopped containers
stop - Stop a running container
exec - Run command in running container
run - Run command in new container
kill - Kill a running container
restart - Restart a running container
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32. Windows Caveat
• To enable hyper-v at runtime --isolation=hyperv
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33. MAVEN Plugins
• https://github.com/spotify/docker-maven-plugin
• https://github.com/rhuss/docker-maven-plugin
• https://github.com/wouterd/docker-maven-plugin
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34. Quick Maven Demo
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35. Commands: Organize
rename - Rename a container
tag - Tag an image into a repository
commit - Create a new image from a container's
changes
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36. Commands: Etc.
cp - Copy files to and from containers
port - List port mappings
ps - List containers
attach - Attach to a running container
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37. Docker Registry
• Place to Store your images
• Can run in a container also
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38. Docker Compose
• Create Multi-container Applications
• Example:
• Java App
• Database
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39. Docker Compose
• Uses decriptor file compose.yml
• Brings up an application
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40. Docker Compose Commands
build - Build or rebuild services
kill - Kill containers
up - Create and start containers
migrate-to-labels - Recreate containers to add
labels
version - Show the Docker-Compose version
information
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41. The docker-compose.yml 8
web:
build: .
links:
- db
ports:
- "8000:8000"
db:
image: postgres
8
For more information about file arguments check here.
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42. Demo docker-
compose
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43. Docker on Windows
• https://msdn.microsoft.com/en-us/
virtualization/windowscontainers/deployment/
docker_windows
Resources
• https://msdn.microsoft.com/en-us/
virtualization/windowscontainers/deployment/
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44. Project 9
• https://github.com/hdost/
docker-presentation
9
Image Source: http://xkcd.com/1597/
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45. Questions?
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46. Contact
• Harold Dost
• @hdost
• harold.dost@raastech.com
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