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Docker hands-on in Toreta Yuichiro MASUI 
 masuidrive@toreta.in

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Dockerͱ͸ • Ծ૝Խٕज़ͷ૊Έ߹Θͤ • ܰྔ • Πϝʔδ഑෍ͷ࢓૊Έ͕੔͍ͬͯΔ • ࢖͍ࣺͯͷΠϯελϯεͱͷ૬ੑ͕ྑ͍

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ϑΝΠϧͱϓϩηε Host OS ϓϩηε ϓϩηε ϓϩηε FS ϓϩηε FS ϑΝΠϧγεςϜ Docker daemon Container Container Network Network

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Docker Container • ϓϩηεͷִ཭ • Dockerϓϩηε͔Βଞͷϓϩηε͸ݟ͑ͳ͍ • ϑΝΠϧγεςϜͷִ཭ • ϓϩηεຖʹݟ͑ΔϑΝΠϧ͸ҧ͏

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ϑΝΠϧͱϓϩηε

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Docker Machine Host OS ϓϩηε ϓϩηε ϑΝΠϧγεςϜ Docker daemon VirtualBox OSX / Windows Docker Machine ϓϩηε FS ϓϩηε FS Network Network

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DockerͰγΣϧىಈ • “Docker Quickstart Terminal”Λ3ຕىಈ • docker run -it ubuntu:14.04 /bin/bash • ps aux • touch /abc123 • docker run -it ubuntu:14.04 /bin/bash • ls / • docker ps

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ͳʹ͕ى͍ͬͯ͜Δ͔ • docker run -it ubuntu:14.04 /bin/bash • “ubuntu:14.04” ࣮ߦ͢ΔϑΝΠϧΠϝʔδ • ϩʔΧϧʹͳ͍৔߹͸μ΢ϯϩʔυ • ΠϝʔδΛల։͠DockerͰىಈ • “-it” ίϯιʔϧΛܨ͛Δ

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ͳʹ͕ى͍ͬͯ͜Δ͔ • ىಈ͢ΔͨΊʹ৽͍͠ϑΝΠϧγεςϜΛ࡞Δ • docker ps -a • docker rm CONTAINER_ID

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Πϝʔδ • ΠϝʔδϑΝΠϧ͸Docker HubͰ഑෍ • ഑෍͢Δ࢓૊ΈΛDocker RegistryͱݺͿ • ֤छΠϝʔδ͕ެࣜʹ഑෍͞Ε͍ͯΔ • https://hub.docker.com/_/ubuntu/

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Πϝʔδ • OSҎ֎ʹΞϓϦͷΠϝʔδ΋ఏڙ͞Ε͍ͯΔ • docker run -it --rm ruby:2.3.0 /bin/bash • ruby -v • “--rm" ίϯςφΛऴྃ࣌ʹϑΝΠϧΛফ͢

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ࣗ෼ͷΠϝʔδΛ࡞Δ • ΠϝʔδʹมߋΛՃ͑Δ • Dockerfile FROM ubuntu:14.04 RUN apt-get update RUN apt-get install -y apache2 CMD ["/usr/sbin/apache2ctl","-D","FOREGROUND"]

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DockfileΛىಈ • docker build -t myapache ./ • “-t myapache” Πϝʔδ໊ • “./“ DockerfileͷσΟϨΫτϦ • docker run -p 8080:80 myapache • http://192.168.99.100:8080 • docker-machine ip

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docker-machine • docker-machine restart • $(docker-machine env)

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ڧ੍ఀࢭ • docker ps • docker stop CONTAINER_ID

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ϗετͷϑΝΠϧΛϚ΢ϯτ • docker run -v `pwd`:/var/www/html -p 8080:80 myapache

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Containerؒ௨৴ • Container͸ಠཱ͍ͯ͠ΔͷͰlocalhostͰ͸ΞΫ ηεͰ͖ͳ͍ • ͦͷลΛ؆୯ʹ͢Δͷ͕Docker Compose

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docker-compose.yml rails:
 build: .
 command: [“./bin/rails","server","-b","0.0.0.0"]
 mem_limit: 512m
 ports:
 - "3000:3000"
 volumes:
 - ".:/usr/src/app"
 links:
 - "mysql" mysql:
 image: mysql:5.6
 environment:
 MYSQL_ROOT_PASSWORD: "passwd"

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ΊΜͲ͍ͷͰϫϯϥΠφʔ • DockerͰRails։ൃ؀ڥΛ࡞ΔϫϯϥΠφʔ • http://qiita.com/masuidrive/items/7478fb9101652f2bbae1

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docker-compose ࣮ߦ • docker-compose build • docker-compose up • docker-compose rm

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database.yml • default: &default
 adapter: mysql2
 username: root
 password: "passwd"
 host: mysql • production:
 <<: *default
 host: <%= ENV[‘MYSQL_HOST'] %>
 ↑͜ͷߦΛ௥Ճ

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scaffold • docker-compose up -d • docker-compose run rails /bin/bash • rails g scaffold item key:string value:text • rake db:create db:migrate • http://192.168.99.100:3000/items • docker-compose stop

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Amazon ECS & ECR • Amazon EC2 Container System • Dockerͱecs-agentೖΓઐ༻ͷAMI • DockerΛૢ࡞͢Δίϯιʔϧ & API • Amazon EC2 Container Registry • Docker Registry

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ECRʹRepositoryΛ࡞੒ • ը໘ӈ্ͷRegion͸N.Virginia • Sample appͷνΣοΫΛ֎ͯ͠ • “sample1”ͷϦϙδτϦΛ࡞Δ

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ECRʹimageΛpush • $(aws ecr get-login --region us-east-1) • docker build -t sample1 . • docker tag sample1:latest 123456.dkr.ecr.us- east-1.amazonaws.com/sample1:latest • docker push 123456.dkr.ecr.us- east-1.amazonaws.com/sample1:latest

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RDS࡞Ζ͏ • ύεϫʔυ͸޷͖ͳϞϊΛ • Publicly access͸”NO”Ͱ

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ECS Cluster

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ECS instance • cluster࡞ͬͯ • ecs AMIͰΠϯελϯε࡞ΔɻIAM role๨Εͣʹ • http://docs.aws.amazon.com/AmazonECS/latest/ developerguide/instance_IAM_role.html

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Task defnition • docker-composeʹ૬౰ • ίϯςφͷͨΊͷ؀ڥΛઃఆ

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ಉ͡Α͏ʹmigrate Task΋ • appͱ΄΅ಉ͡ • Port͸ઃఆ͠ͳ͍ • Command͸ɺ./bin/rake,db:migrate

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Service

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Service ͱ Task • Service͕TaskΛ্ཱͪ͛Δ • Task͸1ͭҎ্ͷContainerΛ༗͢Δ • Task͕མͪΔͱService͕ࣗಈతʹTaskΛىಈ • Service͔Βىಈ͞Εͳ͍λεΫ͸୯ൃىಈ • rake db:migrateͱ͔

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production.logΛݟΔ • sshͯ͠ • docker ps • docker exec -it CONTAINER_ID /bin/bash