Tech Talks 1: Docker

Perkenalan fitur docker
Perbandingan dengan sistem lain
Tutorial docker sederhana
Dockerfile

Transcript

1. Tech Talks: docker
3. Introduction • Backend Engineer at Xtend Indonesia • CTO of TestMate • Member of Indonesian Bioinformatics and Biodiversity Society • Google Developer Groups Medan • Open source enthusiast and Communities Fellow • Tech Background: Backend stuff, IaaS & PaaS Cloud, DevOps, more at https://fikihfirmansyah.my.id
4. Apa yang akan dibahas - Perkenalan fitur docker - Perbandingan dengan sistem lain - Tutorial docker sederhana - Dockerfile
5. Apa yang tidak akan dibahas - Memanfaatkan docker di real-life - Implementasi infrastruktur docker - Implementasi teknis lanjut
8. - Mudah dipelajari - Paus nya lucu - Dibikin pakai go
9. serius :)
10. Perubahan arsitektur
11. Fitur - images • Ngebungkus setiap aplikasi dalam “kotak” yang sama (dependencies dan bisa dijalankan di mana saja) • Mengisolasi berbagai hal dari satu sama lain • Prosedur pembuatan yang terstandarisasi (Dockerfile)
12. Containers
13. Fitur - containers • Mengelola kontainer ◦ Menjalankan & menghentikan ◦ Menyimpan & memuat (dari file) • Memasang volume ◦ Sharing data ◦ Persistensi data • Membuat Jaringan yang menghubungkan antar containers
14. Works on everyone's machine
15. Isolation
16. Portability
17. Fitur - workflow • Docker daemon dan CLI • Docker hub dan registry • Image versioning (pull, commit, pull, layers)
18. Docker vs VM
19. secara sederhana
20. Ringan dan cepat
21. Sharing OS
22. Not really a VM
23. Why docker? Why not lxc?
24. Why docker? Why not lxc?
25. Why docker? Why not lxc?
26. Docker tutorial
27. Pull it! $ docker pull busybox • Search docker registry for repository of given name • Downloads the repository • Pulls only changes
28. Pull it! $ docker pull busybox • Search docker registry for repository of given name • Downloads the repository • Pulls only changes next time
29. Pull it! $ docker pull busybox • Search docker registry for repository of given name • Downloads the repository • Pulls only changes next time
30. RUN!
31. Run it! $ docker run busybox:ubuntu- 14.04 echo "hello" • Make sure that image is available (downloads if not found) • Create a container • Run a command
32. Run it! $ docker run -it busybox:ubuntu- 14.04 sh • -it → makes container interactive • Create a container • Give you a shell access
33. More complicated example • Run laravel project in a container • Run it as a daemon • • Bind it to network Make storage persistent
34. Run it! $ docker run -d -v /var/docker/redis:/da ta -p 6379:6379 --name=redis dockerfile/redis • -d → launch as daemon • -v /var/docker/redis:/data → mount directories • -p 6379:6379 → forward ports
35. Run it! $ docker run -d -v /var/docker/redis:/da ta -p 6379:6379 --name=redis dockerfile/redis • -d → launch as daemon • -v /var/docker/redis:/data → mount directories • -p 6379:6379 → forward ports
36. Run it! $ docker run -d -v /var/docker/redis:/da ta -p 6379:6379 --name=redis dockerfile/redis • -d → launch as daemon • -v /var/docker/redis:/data → mount directories • -p 6379:6379 → forward ports
38. Watch it! $ docker ps Prints out information about docker containers
39. Watch it! $ docker ps -a Prints out information about all docker containers: • Running • Exited
40. Watch it! $ docker logs -t --follow romantic_enstein • Get logs from stdin/stdout of container • -t → show timestamp • --follow → similar to tail -f
41. Watch it! $ docker inspect romantic_enstein • Get info about container • Environment variables • Ports Links
42. Watch it! nsenter ssh • nsenter uses namespaces • Ssh needs ssh server inside
43. Tidy up docker rm <container_id> docker rmi <image_id> • Docker images use lots of space • Docker images can clog all your available space on server (no more pulling from registry)
44. Repository workflow docker diff <container_id> docker commit <contaner_id> attero/stuff:my-tag • Versioning! Tags • Multiple versions Push & pull
45. What we learned so far • Repository workflow ◦ Pull ◦ Commit ◦ Push • Tidying up after containers ◦ Rm ◦ Rmi • Monitoring ◦ Ps ◦ Logs ◦ Inspect ◦ Top • Running containers ◦ Interactive ◦ Daemon ◦ Mounting ◦ Forwarding
46. Containers are nice :)
47. How about automation?
48. DOCKERFILE
49. DOCKERFILE
50. DOCKERFILE -Version control -Automation -Portability
51. DOCKERFILE # Use the official Node.js 14 image as a base FROM node:14 # Set the working directory in the container WORKDIR /usr/src/app # Copy package.json and package-lock.json (if available) to the working directory COPY package*.json ./ # Install app dependencies RUN npm install # Bundle app source inside the Docker image COPY . . # Expose port 3000 to the outside once the container has launched EXPOSE 3000 # Define the command to run the app CMD ["node", "index.js"]
52. DOCKERFILE Every command in Dockerfile is run on a different container
53. DOCKERFILE Cache! use it, save lots of time not changed layers are reused
54. DOCKERFILE • short • good base image • most changing things at the bottom
55. Q & A