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[トレタ社内勉強会 "Dockerの上でRailsアプリを動かす ハンズオン
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Yuichiro MASUI
April 13, 2016
Programming
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5.5k
[トレタ社内勉強会 "Dockerの上でRailsアプリを動かす ハンズオン
Yuichiro MASUI
April 13, 2016
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Transcript
Docker hands-on in Toreta Yuichiro MASUI
[email protected]
Dockerͱ • ԾԽٕज़ͷΈ߹Θͤ • ܰྔ • ΠϝʔδͷΈ͕͍ͬͯΔ • ͍ࣺͯͷΠϯελϯεͱͷ૬ੑ͕ྑ͍
ϑΝΠϧͱϓϩηε Host OS ϓϩηε ϓϩηε ϓϩηε FS ϓϩηε FS ϑΝΠϧγεςϜ
Docker daemon Container Container Network Network
Docker Container • ϓϩηεͷִ • Dockerϓϩηε͔Βଞͷϓϩηεݟ͑ͳ͍ • ϑΝΠϧγεςϜͷִ • ϓϩηεຖʹݟ͑ΔϑΝΠϧҧ͏
ϑΝΠϧͱϓϩηε
Docker Machine Host OS ϓϩηε ϓϩηε ϑΝΠϧγεςϜ Docker daemon VirtualBox
OSX / Windows Docker Machine ϓϩηε FS ϓϩηε FS Network Network
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
ͳʹ͕ى͍ͬͯ͜Δ͔ • docker run -it ubuntu:14.04 /bin/bash • “ubuntu:14.04” ࣮ߦ͢ΔϑΝΠϧΠϝʔδ
• ϩʔΧϧʹͳ͍߹μϯϩʔυ • ΠϝʔδΛల։͠DockerͰىಈ • “-it” ίϯιʔϧΛܨ͛Δ
ͳʹ͕ى͍ͬͯ͜Δ͔ • ىಈ͢ΔͨΊʹ৽͍͠ϑΝΠϧγεςϜΛ࡞Δ • docker ps -a • docker rm
CONTAINER_ID
Πϝʔδ • ΠϝʔδϑΝΠϧDocker HubͰ • ͢ΔΈΛDocker RegistryͱݺͿ • ֤छΠϝʔδ͕ެࣜʹ͞Ε͍ͯΔ •
https://hub.docker.com/_/ubuntu/
Πϝʔδ • OSҎ֎ʹΞϓϦͷΠϝʔδఏڙ͞Ε͍ͯΔ • docker run -it --rm ruby:2.3.0 /bin/bash
• ruby -v • “--rm" ίϯςφΛऴྃ࣌ʹϑΝΠϧΛফ͢
ࣗͷΠϝʔδΛ࡞Δ • ΠϝʔδʹมߋΛՃ͑Δ • Dockerfile FROM ubuntu:14.04 RUN apt-get update
RUN apt-get install -y apache2 CMD ["/usr/sbin/apache2ctl","-D","FOREGROUND"]
DockfileΛىಈ • docker build -t myapache ./ • “-t myapache”
Πϝʔδ໊ • “./“ DockerfileͷσΟϨΫτϦ • docker run -p 8080:80 myapache • http://192.168.99.100:8080 • docker-machine ip
docker-machine • docker-machine restart • $(docker-machine env)
ڧ੍ఀࢭ • docker ps • docker stop CONTAINER_ID
ϗετͷϑΝΠϧΛϚϯτ • docker run -v `pwd`:/var/www/html -p 8080:80 myapache
Containerؒ௨৴ • Containerಠཱ͍ͯ͠ΔͷͰlocalhostͰΞΫ ηεͰ͖ͳ͍ • ͦͷลΛ؆୯ʹ͢Δͷ͕Docker Compose
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"
ΊΜͲ͍ͷͰϫϯϥΠφʔ • DockerͰRails։ൃڥΛ࡞ΔϫϯϥΠφʔ • http://qiita.com/masuidrive/items/7478fb9101652f2bbae1
docker-compose ࣮ߦ • docker-compose build • docker-compose up • docker-compose
rm
database.yml • default: &default adapter: mysql2 username: root password: "passwd"
host: mysql • production: <<: *default host: <%= ENV[‘MYSQL_HOST'] %> ↑͜ͷߦΛՃ
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
Amazon ECS & ECR • Amazon EC2 Container System •
Dockerͱecs-agentೖΓઐ༻ͷAMI • DockerΛૢ࡞͢Δίϯιʔϧ & API • Amazon EC2 Container Registry • Docker Registry
ECRʹRepositoryΛ࡞ • ը໘ӈ্ͷRegionN.Virginia • Sample appͷνΣοΫΛ֎ͯ͠ • “sample1”ͷϦϙδτϦΛ࡞Δ
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
RDS࡞Ζ͏ • ύεϫʔυ͖ͳϞϊΛ • Publicly access”NO”Ͱ
ECS Cluster
ECS instance • cluster࡞ͬͯ • ecs AMIͰΠϯελϯε࡞ΔɻIAM roleΕͣʹ • http://docs.aws.amazon.com/AmazonECS/latest/
developerguide/instance_IAM_role.html
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Task defnition • docker-composeʹ૬ • ίϯςφͷͨΊͷڥΛઃఆ
None
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ಉ͡Α͏ʹmigrate Task • appͱ΄΅ಉ͡ • Portઃఆ͠ͳ͍ • Commandɺ./bin/rake,db:migrate
Service
Service ͱ Task • Service͕TaskΛ্ཱͪ͛Δ • Task1ͭҎ্ͷContainerΛ༗͢Δ • Task͕མͪΔͱService͕ࣗಈతʹTaskΛىಈ •
Service͔Βىಈ͞Εͳ͍λεΫ୯ൃىಈ • rake db:migrateͱ͔
production.logΛݟΔ • sshͯ͠ • docker ps • docker exec -it
CONTAINER_ID /bin/bash