Blocks in containers

Lessons learned from containerizing Minecraft.

Transcript

1. Blocks in containers lessons learned from containerizing Minecraft
2. @juliaferraioli 2 Julia Ferraioli Software Engineer Open Source @ Google Empathy in tech advocate ML enthusiast
3. @juliaferraioli 3
4. @juliaferraioli 4 I’m addicted to Minecraft 4
5. @juliaferraioli 5
6. @juliaferraioli 6 Okay, I’m addicted to Minecraft and Lego 6
7. @juliaferraioli 7
8. @juliaferraioli 8 Alright, I’m addicted to Minecraft, Lego, and cloud 8
9. @juliaferraioli 9
10. @juliaferraioli 10 Fine! I’m addicted to Minecraft, Lego, cloud, and containers 10
11. @juliaferraioli Let’s talk about containers 11
12. @juliaferraioli 14%-36% 12 Running in production The New Stack: http://bit.ly/containers-in-prod
13. What’s the barrier here? 13 CC image courtesy of Kevin: https://flic.kr/p/7EUqHX
14. @juliaferraioli We have educational resources 14 14
15. @juliaferraioli We have cloud provider support 15 15
16. @juliaferraioli We have meetup upon meetup 16 16
17. 17 CC image courtesy of Andrew Albosta: https://flic.kr/p/ab3VhW Missing the link between here and awesometown
18. We need a toy… problem 18 CC image courtesy of Glenn Calvin: https://flic.kr/p/5LfNZM
19. 19 ❔ • ...that predate the surge in container popularity? • ...that are understood/used by many? • ...that are complex enough that containerization makes sense ...but simple enough to tackle? What sort of fully-baked apps do we have... 19 ❔ ❔
20. @juliaferraioli 20 20
21. @juliaferraioli Phase 1: experimentation 21
22. @juliaferraioli Uh, hello Minecraft? What does Minecraft need? FROM debian:latest RUN apt-get update && apt-get install -y curl openjdk-7-jre ENV MC_VERSION 1.8.9 ENV BASE_URL https://s3.amazonaws.com/Minecraft.Download/versions ENV SERVER_FILE minecraft_server RUN mkdir /opt/mc WORKDIR /opt/mc RUN curl $BASE_URL/$MC_VERSION/$SERVER_FILE.$MC_VERSION.jar \ -o minecraft.jar && chmod u+x minecraft.jar CMD java -Xmx1024M -Xms1024M -jar minecraft.jar nogui 22 Java. It needs Java.
23. 23 CC image courtesy of Josh Wedin: https://flic.kr/p/amAXdF This is kind of old hat
24. 24 Where’s the magic?
25. @juliaferraioli Phase 2: 25 cautious containerization
26. @juliaferraioli Building and testing ➜ ~ docker build -t juliaferraioli/mc:v1 . ➜ ~ docker run -p 25565:25565 -d juliaferraioli/mc:v1 d7d5e58f8833952b51d33c9c63a2b763f1a290d33270245a518d17d689f45f39 ➜ ~ docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES well, . 26
27. @juliaferraioli Phase 3: problem identification 27
28. @juliaferraioli I build and run but nothing happens! `-d` means detached => when our CMD exits, the container exits => `java -Xmx1024M -Xms1024M -jar minecraft.jar nogui` must have exited 28
29. @juliaferraioli Okay, let’s remove the flag ➜ ~ docker run -p 25565:25565 juliaferraioli/mc:v1 29 [16:33:54] [Server thread/INFO]: Starting minecraft server version 1.9.2 [16:33:54] [Server thread/INFO]: Loading properties [16:33:54] [Server thread/WARN]: server.properties does not exist [16:33:54] [Server thread/INFO]: Generating new properties file [16:33:54] [Server thread/WARN]: Failed to load eula.txt [16:33:54] [Server thread/INFO]: You need to agree to the EULA in order to run the server. Go to eula.txt for more info. [16:33:54] [Server thread/INFO]: Stopping server
30. @juliaferraioli Ohhhhhh... 30 startServer.sh • If there’s already an accepted EULA... • or if we accepted through the ENV... • go ahead and start the server. • Else, prompt the user to read the EULA and exit the script CC image courtesy of Betsy Weber: https://flic.kr/p/nE6i31
31. @juliaferraioli Uh, hello Minecraft? (Reprise) What does Minecraft need? FROM debian:latest RUN apt-get update && apt-get install -y curl openjdk-7-jre ENV MC_VERSION 1.8.9 ENV BASE_URL https://s3.amazonaws.com/Minecraft.Download/versions ENV SERVER_FILE minecraft_server RUN mkdir /opt/mc WORKDIR /opt/mc COPY startServer.sh /opt/mc/ RUN curl $BASE_URL/$MC_VERSION/$SERVER_FILE.$MC_VERSION.jar \ -o minecraft.jar && chmod u+x minecraft.jar startServer.sh CMD ./startServer.sh 31 Java. It needs Java. And an accepted EULA.
32. @juliaferraioli Lesson(s) 32
33. 33 Storage becomes complicated CC image courtesy of Windell Oskay: https://flic.kr/p/4hAC16
34. 34 Storage stays complicated CC image courtesy of Windell Oskay: https://flic.kr/p/4hAC16
35. 35 Ephemerality is hard to grok CC image courtesy of Spielbrick Films: https://flic.kr/p/bxSAE4
36. @juliaferraioli Phase 4: 36 containerizing ALL the things!
37. @juliaferraioli I’m the conductor of this orchestra 37 CC image courtesy of Brian Alano: https://flic.kr/p/npdy7U
38. @juliaferraioli I’m the conductor of this orchestra ➜ ~ kubectl run mc --image=gcr.io/octopodes-go-bloop/mc:v2 \ --env="EULA=true" --port=25565 ➜ ~ kubectl expose deployment mc type=LoadBalancer ➜ ~ kubectl describe services mc 38
39. @juliaferraioli Phase 5: freedom! 39
40. 40 Breaking out of the machine CC image courtesy of Shadowman39: https://flic.kr/p/q1oivr
41. 41 Lack of boundaries is freeing CC image courtesy of Chris Sampson: https://flic.kr/p/C4Ebc4
42. @juliaferraioli Phase 6: absurdity 42
43. @juliaferraioli Resources • Minecraft EDU: http://bit.ly/mc-edu • Dockercraft: http://bit.ly/dockercraft • Kubernetes: http://bit.ly/k8s-for-users • Beyond ‘Screen Time’: http://bit.ly/beyond-the-screen • Where’s the Ball?: http://bit.ly/wheres-the-ball • Docker documentation: http://bit.ly/docs-docker • Kubecraft (!!!): http://bit.ly/kubecraft 43
44. @juliaferraioli 44 CC image courtesy of Sheila Thomson: https://flic.kr/p/bxCySn Thanks!
45. @juliaferraioli Uh oh! 45 CC image courtesy of Frédérique Voisin-Demery: https://flic.kr/p/t7Kmn9
46. @juliaferraioli 46