Introduction to Docker

Transcript

1. Introduction to Docker by josé albornoz

2. José Albornoz chilean ruby = <3 co-founding startup ! @eljojo

   eljojo.net

3. what’s docker?

4. what’s docker? • Management system for LXC Containers • Lightweight

   virtual machines • Applications are isolated and easy to distribute

5. Demo

6. how does it work?

7. Docker Image • Snapshot of filesystem • They run one

   process

8. Demo

9. Layers

10. Layers Ubuntu

11. Layers Ubuntu nginx

12. Layers Ubuntu nginx ruby

13. Layers Ubuntu nginx ruby rails application

14. Layers !"5e66087f3ffe Virtual Size: 192.5 MB # $"4d26dd3ebc1c Virtual Size:

    192.7 MB # $"99ec81b80c55 Virtual Size: 266 MB # $"efc4fbcd007f Virtual Size: 584.5 MB # $"1f089cc15e82 Virtual Size: 584.5 MB Tags: ubuntu # #$"5c1088024f94 Virtual Size: 876.2 MB Tags: ubuntu-desktop # # $"afe3aba3e6e0 Virtual Size: 1.06 GB Tags: chrome # !"a97296852f54 Virtual Size: 606.2 MB # # $"4e81a0cd7256 Virtual Size: 606.2 MB Tags: ruby # !"c2b10e69958d Virtual Size: 596.8 MB # # $"0a422c0cdf16 Virtual Size: 596.8 MB Tags: redis # $"9f3000270ba2 Virtual Size: 643.8 MB # $"4b49b0b7aa4c Virtual Size: 643.8 MB # $"1535da87b710 Virtual Size: 660.8 MB Tags: nodejs

15. Dockerfile • Images are created through Dockerfiles • Simple script

    that prepares the system to run the app

16. Dockerfile FROM eljojo/golang-docker
 
 WORKDIR /app
 
 RUN git clone

    https://github.com/eljojo/shouldidothat.git .
 RUN go get -d
 RUN go build -o shouldidothat
 
 CMD ["/app/shouldidothat", "-c", "/etc/ shouldidothat/conf.json"]

17. Container • Instance of Docker Image • Has it’s own

    private IP • You can map folders in host to folders in container

18. Demo

19. Registries • Like Git but for Docker Images • The

    Docker Index will host your public images for free

20. CoreOS

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25. Thanks!

26. github.com/eljojo/altoids