Docker 入門 Introduction to Docker

1. Agenda
1. What is Docker
2. Image & Container
3. Dockerfile
4. Dockerhub & Docker
Registry
6. Main process in container
7. Volume
8. Networking

2. What is Docker
“I’ have a linux, I have a docker.
umm..! Container !”

3. What is Docker
• (X)
• Container (O)

4. What is Docker

5. What is Docker

6. What is Docker
• running centos6 on vm:
• linux kernel is 2.6.x
• running centos6 in docker on centos7:
• linux kernel is 3.10.x
• running centos6 in docker on ubuntu16:
• linux kernel is 4.4.x

7. Image and Container
“ ”

8. Image and Container

9. Image and Container

10. Dockerfile
“ ”

11. Dockerfile
vim Dockerfile

12. Docker file

13. Dockerhub &
Private registry
“ image push
pull ”

14. Dockerhub & Private registry
• Docker image location/name:tag
• location image ( docker.io)
• name image
• tag ( latest)

15. Dockerhub & Private registry
• docker push image image push
pull
• Example
• docker push genchi/myimage
• push image docker hub genchilu user
• docker push docker-registry:5000/myimage
• push docker-registry:5000 server

16. Main process in
container
“ ”

17. Main process in container
• image container main
process ( process container pid 1)
• main process container close
• container (
deamon container close)

18. Main process in container

19. Volume
“volume data ”

20. Volume

21. Volume
• docker run -v host-dir:container-dir image

22. Networking
“ ”

23. Networking

24. Networking
• docker network

25. Networking
• net

26. Networking
• port

27. Networking
• host container
port docker-proxy