The document provides an overview of Docker containers and how they can benefit developers. It discusses how containers allow applications and dependencies to be packaged together and deployed consistently across environments. The document also outlines how to build Docker images, run containers, and use Docker commands and Docker Compose for orchestration. It promotes containers as a way to standardize environments and increase deployment frequency.

1. The busy developers guide to Docker
Maurice de Beijer - @mauricedb
ROME 24-25 MARCH 2017

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
• Hosting a Docker image on Azure
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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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25. DockeronWindows
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26. Containers can be great…
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37. Maurice de Beijer - @mauricedb