The busy developers guide to Docker presentation at the QNH DevDays

1. The busy developers guide to Docker
Maurice de Beijer
@mauricedb

2. Who am I?
• Maurice de Beijer
• The Problem Solver
• Microsoft Azure MVP
• Freelance developer/instructor
• Twitter: @mauricedb and @React_Tutorial
• Web: http://www.TheProblemSolver.nl
• E-mail: maurice.de.beijer@gmail.com
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3. Overview
• What are containers
• Why use container technology?
• What is Docker
• Creating and running Docker images
• Running an ASP.NET Core 1.0 App in a Docker
container
• But we need more
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4. What is a container?
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5. Once upon a ship
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6. Loading cargo the old way6

7. A container ship these days
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8. Loading is a bit faster
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9. Running virtual machines
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10. Virtual Machines vs Containers
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11. Namespaces
Cgroups
Union file system
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12. What is Docker?
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13. Docker Hub
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14. Why use Docker?
• Package an application with it’s dependencies
• Dev environment behaves exactly like production
• Less overhead means more deployments on a server
• Deploy the same container in different clouds
• Not just for cloud computing
• Docker has standardized container formats
• It’s open source 
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15. Some other Docker Use Cases
• Simulate deployed environment during
development
– Each container simulates a machine
• Share containers between developers
– Database containers with sample data
• Also use in the (automated) QA environment
– Build containers with compilers and libraries
• Also use in the CI environment
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16. Buildingcontainers
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17. Useful docker image commands
• docker images
• docker pull <image name>
• docker build –t <image name> <folder>
• docker run <image name>
• docker rmi <image id>
• docker rmi $(docker images -q -f dangling=true)
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18. Useful docker container commands
• Docker ps
• docker logs <container name>
• docker stop <container name>
• docker start <container name>
• docker kill <container id>
• docker rm <container id>
• docker rm $(docker ps -a -q)
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20. Orchestration
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21. DockerCompose
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23. TheminimalDockerfile
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25. DockeronWindows
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27. Containers can be great…
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