Docker 101 Rubyist Edition

Sample code at https://github.com/danguita/talks/tree/master/docker-101-rubyist-edition

Transcript

1. DOCKER 101
   David Anguita <3 CiudadReal.rb
   

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2. Hi, I'm @danguita
   

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3. Let's talk about software containers
   

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4. "It works on my machine"
   

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5. Provides a widely adopted and easy-to-use
   interface to lightweight Linux Containers
   Why Docker?
   

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6. Virtual Machine model vs Docker Engine model
   Why Docker?
   Source: http://docker.com
   

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7. Minimal overhead
   

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8. Daemon
   ●
   Manages containers
   ●
   Exposes a REST-ish API
   Client
   $ docker ps
   $ docker images
   $ docker run
   ...
   Docker Engine
   Docker Machine
   

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9. Image vs Container
   $ docker images
   $ docker build
   $ docker pull
   $ docker push
   $ docker commit
   $ docker rmi
   $ docker ps
   $ docker run
   $ docker start
   $ docker stop
   $ docker rm
   Immutable, snapshot of a container Running instance of an image
   Docker Registry
   

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10. MY FIRST CONTAINER
    

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11. Gluing things together
    

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12. Docker Compose
    $ docker-compose up
    $ docker-compose ps web
    $ docker-compose logs web
    $ docker-compose scale web=5
    ...
    ●
    Multi-container set up
    ●
    Wraps Docker CLI
    ●
    Image building
    ●
    Links
    ●
    Volumes
    ●
    Ports
    ●
    Scaling
    

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13. api:
    image: ...
    command: ...
    environment: ...
    volumes: ...
    links: ...
    ports: ...
    frontend: ...
    sidekiq: ...
    postgres: ...
    elasticsearch: ...
    memcached: ...
    redis: ...
    haproxy: ...
    docker-compose.yml
    

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14. MOAR CONTAINERS!
    

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15. Real-world advantages
    ●
    Easy Continuous Integration / Delivery
    ●
    Consistency across environments
    ●
    Portability
    ●
    Isolated scalability
    ●
    Rapid deployment
    ●
    Instant (micro-)service oriented architecture
    ●
    Clustering
    

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16. Legos for cloud computing
    

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17. ●
    Docker Swarm
    ●
    Kubernetes
    Clustering
    Tooling
    Platforms
    ●
    Amazon EC2 Container service
    ●
    Google Container Engine
    

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18. This is just the beginning
    

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19. Thank you
    

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20. Q&A
    

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21. CiudadReal.rb, January 2016
    

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