Dockerizing CS50. From Cluster to Cloud to Appliance to Container. David J. Malan Dan Armendariz

Transcription

1 Dockerizing CS50 From Cluster to Cloud to Appliance to Container David J. Malan Dan Armendariz

2

3 CS students at Harvard College 350 students at Yale College 300 students at Harvard Extension CS50 for MBAs 90 students at Harvard Business School CS50x 700,000 registrants Kansas City, Miami, Rhode Island, St. Louis,... Bolivia, Chile, Netherlands, Ukraine,... CS50 AP 40 high schools 1,500 students

4 CS students at Harvard College 350 students at Yale College 300 students at Harvard Extension CS50 for MBAs 90 students at Harvard Business School CS50x 700,000 registrants Kansas City, Miami, Rhode Island, St. Louis,... Bolivia, Chile, Netherlands, Ukraine,... CS50 AP 40 high schools 1,500 students

5 CS students at Harvard College 350 students at Yale College 300 students at Harvard Extension CS50 for MBAs 90 students at Harvard Business School CS50x 700,000 registrants Kansas City, Miami, Rhode Island, St. Louis,... Bolivia, Chile, Netherlands, Ukraine,... CS50 AP 40 high schools 1,500 students

6 CS students at Harvard College 350 students at Yale College 300 students at Harvard Extension CS50 for MBAs 90 students at Harvard Business School CS50x 700,000 registrants Kansas City, Miami, Rhode Island, St. Louis,... Bolivia, Chile, Netherlands, Ukraine,... CS50 AP 40 high schools 1,500 students

7 on-campus cluster

8 + managed by university + familiar to students no root access outdated software no support after hours

9 off-campus cloud 2008

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11 + root access + examine students' code in situ + no need for space, power, or cooling + more reliable + more scalable + topical for class time-consuming to administer difficult (at the time) to configure unfamiliar to students latency

12 on-campus cloud

13 + root access + examine students' code in situ + lower latency time-consuming to administer need for space, power, or cooling less scalable less reliable

14 client-side appliance

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16 Fedora Linux, Xfce Kickstart Boxgrinder yum VirtualBox

17 Xubuntu apt-get VMware Fusion, VMware Workstation

18 + more familiar environment + graphical tools + distributed load + Apache, MySQL + students could add software + anyone could engage actively time-consuming to prepare virtualization overhead brickable (hypervisor bugs) slow to boot, resume

19 TeamViewer Guest Additions, VMware Tools Dropbox

20 containers 2015

21 development environment production environment students' environment

22 docker-machine docker-compose docker

23 cs50/php hub.docker.com/r/cs50/php

24 app:... memcached:... mysql:... docker-compose.yml

25 docker-compose.yml memcached: container_name: memcached image: memcached

26 docker-compose.yml mysql: container_name: mysql image: mysql environment: MYSQL_DATABASE: app MYSQL_ROOT_PASSWORD: 12345

27 app: build:. container_name: app environment: CACHE_HOST: memcached CACHE_PORT: DB_HOST: mysql DB_NAME: app DB_PASS: DB_USER: root links: - memcached - mysql ports: - "80:80" volumes: -.:/srv/www docker-compose.yml

28 Makefile default: up pull: docker login docker pull cs50/app build: docker-compose build rebuild: docker-compose build --no-cache up: build docker-compose up bash: docker exec -it app bash

29 cs50/cli hub.docker.com/r/cs50/cli

30 $ docker run -i --rm -v "$(pwd)":/root -t cs50/cli This is CS50 CLI. #

31 development environment production environment students' environment

32 GitHub Codeship Amazon Elastic Beanstalk

33 CACHE_HOST CACHE_PORT DB_HOST DB_NAME DB_PASS DB_USER

34 development environment production environment students' environment

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36 c9.io/new

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39 cs50/ide50-offline hub.docker.com/r/cs50/ide50-offline

40 ONLINE 1. load GUI and plugins CDN 2. communicate with instance DOCKER INSTANCE

41 OFFLINE DOCKER INSTANCE 1. load GUI and plugins 2. communicate with instance

42 Dockerfile FROM ide50 # install CS50 plugins ADD./files/harvard.cs50.cat plugins/c9.ide.cs50.cat [..] # Populate offline-specific environment variables RUN echo "export USER=ubuntu\n\ export C9_PROJECT=ide50-offline\n\ export C9_USER=jharvard\n\ export C9_HOSTNAME=\$OFFLINE_IP\n\ export C9_PORT=\$OFFLINE_PORT\n\ export IDE_OFFLINE=1 >/etc/profile.d/offline.sh # install Cloud9 SDK RUN git clone c9sdk

43 CS50 Sandbox

44 CS50 Run CS50 Check HTTP API CS50 Sandbox

45 version 1 Fedora Linux SELinux node.js strace pam_limits nice iptaples...

46 version 2 Docker Ubuntu Linux node.js strace pam_limits nice iptaples...

47 what's next Docker Cloud Docker for Mac, Windows Kitematic Ubuntu

48 recommendations + large courses + OpenCourseWare + web programming cutting bleeding edge

49 Dockerizing CS50 From Cluster to Cloud to Appliance to Container David J. Malan Dan Armendariz