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Wantedly から Chef を一掃した話 / #chibadan
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Daisuke Fujita
October 25, 2016
Programming
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Wantedly から Chef を一掃した話 / #chibadan
サービス開発の現場を語る! #chibadan の発表資料です
http://chibadan.connpass.com/event/41625/
Daisuke Fujita
October 25, 2016
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Transcript
8BOUFEMZ͔Β $IFGΛҰͨ͠ 2016-10-25 αʔϏε։ൃͷݱΛޠΔʂ Daisuke Fujita (@dtan4) https://flic.kr/p/rU5bCU
Daisuke Fujita / @dtan4 Engineer, Infrastructure Team @ Wantedly, Inc.
AWS, Terraform / Terraforming, Developer Productivity
8BOUFEMZ͔Β $IFGΛҰͨͭͭ͠ %PDLFSपΓΛஔ͖͑ͨ 2016-10-25 αʔϏε։ൃͷݱΛޠΔʂ Daisuke Fujita (@dtan4) https://flic.kr/p/rU5bCU
Infrastructure at Wantedly AWS + DNSimple શαʔϏε͕ Docker ίϯςφͰՔಇ EC2
Πϯελϯεͷ OS CoreOS ੲ Ubuntu + Chef Capistrano ΛͬͨಠࣗͷσϓϩΠγεςϜ + Heroku CLI ಉ༷ͷΠϯλʔϑΣΠεΛ࣋ͭ CLI https://speakerdeck.com/dtan4/number-abejameetup
Web (Rails) Docker image 2ஈߏ ࠩͷΈͷ fetch + bundle install
Ͱ σϓϩΠΛߴԽ intermediate Chef + Packer ΠϝʔδαΠζ 3GB bundle install git clone wantedly/wantedly Ruby FROM Ubuntu 14.04 rake assets:precompile bundle install git checkout <branch> git fetch FROM intermediate web (Dockerfile) intermediate (Chef)
Web (Rails) Docker image 2ஈߏ ࠩͷΈͷ fetch + bundle install
Ͱ σϓϩΠΛߴԽ intermediate Chef + Packer ΠϝʔδαΠζ 3GB bundle install git clone wantedly/wantedly Ruby FROM Ubuntu 14.04 rake assets:precompile bundle install git checkout <branch> git fetch FROM intermediate web (Dockerfile) intermediate (Chef)
pull :intermediate push :production pull :production build :production $ sap
prod deploy (3:00 am) docker push :intermediate
Chef + Packer AWS Ҡߦॳ͔Β2Ҏ্Ҿ͖ܧ͕Ε͖ͯͨൿͷ Chef Ϩγϐ Packer Ͱ ubuntu:14.04
Πϝʔδ্ʹϓϩϏδϣχϯά => Private Registry ʹ push
Chef + Packer ??? ઐ༻ͷ EC2 Πϯελϯε1ͷΈͰՔಇ͍ͯͨ͠ ਓؒͷ Macbook ͰϓϩϏδϣχϯάͰ͖ͳ͘ͳ͍ͬͯͨ
Chef ʢͷΠϯετʔϧํ๏ʣͷਐԽʹैͦ͜͠Ͷͨ
Chef + Packer ??? 1Πϝʔδ࡞Δͷʹ1࣌ؒҎ্ Ͱ͖͕͋ͬͨΠϝʔδ 3GB Ruby ͷόʔδϣϯΞοϓ
apt ύοέʔδՃ͕໘ ΠϯϑϥνʔϜҎ֎͕৮Γʹ͍͘ σϓϩΠ࣌ͷ docker build ֤Πϯελϯεͷ͕͍
Chef + Packer => ??? ΠϝʔδαΠζΛͬͱখ͍ͨ͘͞͠… ଞͷϝϯόʔ৮Γ͍͢ߏʹ͍ͨ͠… σϓϩΠ͍ͨ͘͠… Dockerfile Ͱॻ͖͍ͨ…ʂ
Private Registry => ??? Docker Private Registry V1 (Python) ʹຊؾͰٽ͔͞Εͨ
Docker Distribution (Go) ͍ͩͿϚγʹͳ͚ͬͨͲ Registry ίϯςφ͕ࢮ͵ڪා૬มΘΒͣ ϚωʔδυαʔϏεʹҠߦ͍ͨ͠…ʂ ECR ౦ژʹདྷͨ͠
2016/10
2016/10 Wantedly, Inc. ͔Β Chef ΛҰ
2016/10 Chef + Packer -> Dockerfile + Docker Compose Ubuntu
14.04 -> Ubuntu 16.04, Alpine Linux 3.4 Private Docker Registry -> Amazon ECR Wantedly, Inc. ͔Β Chef ΛҰ
(3:00 am) docker push :intermediate pull :intermediate push :production pull
:production build :production $ sap prod deploy
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Dockerfile Chef Ϩγϐ -> Dockerfile 1ຕʹू
Dockerfile αʔϏε͝ͱʹ1ຕͷ Dockerfile FROM ubuntu 16.04 / alpine:3.4 Dockerfile ϕετϓϥΫςΟε
Λ࣮ફͯ͠μΠΤοτ
Dockerfile Ruby, Node.js ͷΠϯετʔϧ ಉ͡ Dockerfile ʹॻ͘ ެࣜͷ -alpine Dockerfile
͔Βഈआ Alpine ͷόʔδϣϯ ࣗͨͪͰ੍ޚ αʔϏεʹ߹Θͤͨݴޠόʔδϣϯ
Dockerfile λΠϜελϯϓΛૠೖͯ͠ ҎԼຖճڧ੍తʹϏϧυ ιʔείʔυΛ git clone Access Token Λͬͨೝূ bundle
install -> assets:precompile ARG BUILD_DATE --build-args BUILD_DATE=$(date +%Y%m%d%H%M%S)
Docker Compose શΠϝʔδ Docker Compose ܦ༝Ͱ build & push build
args ΛҰׅཧ Ruby ͷόʔδϣϯΞοϓ ͔͜͜Β awesome: extends: base build: context: awesome args: - RUBY_MAJOR=2.3 - RUBY_VERSION=2.3.0 - RUBYGEMS_VERSION=2.6.6 - BUNDLER_VERSION=1.13.1 - NODE_VERSION=5.11.1 - NPM_VERSION=3.3.12 awesome-production: extends: awesome build: args: - RAILS_ENV=production image: ${AWS_ECR_DOMAIN}/awesome:intermediate
Alpine Linux busybox + α ͷܰྔσΟετϦ (~ 5MB) ύοέʔδϚωʔδϟ apk
͍͍ͨͯͳ͘ಈ͘ɻ ͳΜ͔Μ apk ʹϥΠϒϥϦҰ௨ΓἧͬͯΔɻ
Alpine Linux ʹҠߦ͢Δҙ ֎෦ίϚϯυݺͼग़͠ҙ `...` ͱ͔ os.Exec(...) ͱ͔ ݺͼग़͢όΠφϦ͕ Alpine
Linux ্ͩͱ ಈ͔ͳ͍Մೳੑ͕͋Δ (ex. wkhtmltopdf) ඪ४ίϚϯυ (ex. timeout) busybox ͳͷͰ Ubuntu ͷʹൺͯύϥϝʔλগͳ͔ͬͨΓ
None
Alpine Linux ʹҠߦ͢Δҙ όΠφϦΛ static link ͰϏϧυ͢Δ alpine-pkg-glibc, coreutils ΛೖΕΔ
֎෦ίϚϯυݺͼग़͠Ίͯ Pure ͳखஈʹ ͩΊͳΒૉʹ Ubuntu CentOS ͱ͍ͬͨ ϝδϟʔͳσΟετϦΛ͏ దʹαʔϏεΛఏڙͰ͖Δͷ͕͋͘·Ͱେલఏ
intermediate-build-server intermediate image Λఆظతʹ build ͢Δαʔό CoreOS on EC2 +
IAM Role ຖਂʹશ intermediate image Λ docker-compose build -> docker-compose push
intermediate-build-server #!/bin/bash set -eu metadata=$(curl -s http://169.254.169.254/latest/meta-data/iam/security-credentials/intermediate-build-server/) export AWS_ACCESS_KEY_ID=$(echo $metadata
| jq -r .AccessKeyId) export AWS_SECRET_ACCESS_KEY=$(echo $metadata | jq -r .SecretAccessKey) export AWS_SECURITY_TOKEN=$(echo $metadata | jq -r .Token) document=$(curl -s http://169.254.169.254/latest/dynamic/instance-identity/document) account_id=$(echo $document | jq -r .accountId) region=$(echo $document | jq -r .region) export AWS_ECR_DOMAIN=$account_id.dkr.ecr.$region.amazonaws.com export BUILD_DATE=$(date +%Y%m%d%H%M%S) cd intermediate-dockerfiles if [[ $# -eq 1 ]]; then /opt/bin/docker-compose build $1 else for app in $(cat docker-compose.yml | grep -E '^ [a-z-]+:' | grep -E -- '-(production|qa)' | sed -E 's/^ ([a-z-]*):/\1/'); do echo "[`date`] Building $app..." /opt/bin/docker-compose build $app done fi
intermediate-build-server ? ຊ CI as a Service ্ͰΓ͔ͨͬͨ image pull
-> build -> push Docker 1.10 ͔Β Docker image ͷΈ͕มΘͬͯɺ pull ͖ͯͨ͠Πϝʔδͷʮ్த·ͰΛʯΩϟογϡͱͯ͠ ͏͜ͱ͕Ͱ͖ͳ͘ͳͬͨ https://docs.docker.com/engine/userguide/storagedriver/ imagesandcontainers/#/content-addressable-storage
None
intermediate-build-server Docker 1.13 Ͱղফ༧ఆ
ECR AWS ECS ଐͷ ϑϧϚωʔδυ Docker Registry Terraform ͰϦϙδτϦΛཧ ϩάΠϯ͢ΔεΫϦϓτΛ
1͓͖࣌ؒʹఆظ࣮ߦ
ECR 1ϨϙδτϦ࠷େ1000Πϝʔδ 80 - 90Πϝʔδ / week ϖʔεͰ૿Ճ Lambda Ͱλά͍ͯͳ͍ΠϝʔδΛఆظతʹ͓আ
ECR dtan4/ecr-gc
Ҡߦ݁Ռ
Ҡߦ݁Ռ ΠϝʔδαΠζ 3.307 GB -> 2.24 GB -> 2.43 GB
Ϗϧυ࣌ؒ 48 m -> 16 m 5 s Alpine Linux Ubuntu
TODO Serverspec ॻ͍͚ͨͲ CI ͕ͳ͍ shallow clone ͰΠϝʔδΛ͞ΒʹμΠΤοτ ͱ͔ͱ͔…
Recap
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