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Docker を使ったサービス構築速習会
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Daisuke Fujita
April 12, 2016
Technology
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Docker を使ったサービス構築速習会
Docker を使ったサービス構築速習会 @ Wantedly #docker_wantedly の発表資料です
http://wantedly.connpass.com/event/27061/
Daisuke Fujita
April 12, 2016
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Transcript
%PDLFSΛͬͨ αʔϏεߏங शձ!8"/5&%-: EPDLFS@XBOUFEMZ %BJTVLF'VKJUB!EUBO ʢެ։൛ʣ
Daisuke Fujita @dtan4 Πϯλʔϯ @ΠϯϑϥνʔϜ
࣭4ZODͷ෦ʹͯड͚͚·͢ ʢຊΑΓʣ.BD"QQ4UPSF͔ΒμϯϩʔυͰ͖·͢ʂ CHECK! http://s.wantedly.com/1SL5Um0
%PDLFSೖͬͯ·͔͢ʁಈ͖·͔͢ʁ CHECK! $ docker -v Docker version 1.10.0, build 590d510
$ docker ps CONTAINER ID … $ docker-compose -v docker-compose version 1.6.0, build unknown ʢόʔδϣϯಛʹؾʹ͠ͳ͍Ͱ͢ɻͪΖΜ࠷৽Ͱ͋Δ΄ͲΑ͍ʣ
ຊͷ༰ w 8BOUFEMZͰͷ։ൃʹ͓͚Δॾ w %PDLFS$PNQPTFͰαʔϏεΛಈ͔ͦ͏ w %PDLFS$PNQPTFͰߏஙͨ͠ΞϓϦΛ σϓϩΠ͠Α͏ w %PDLFS1BB4*BB4
Wantedly Ͱͷ։ൃʹ ͓͚Δॾ
www.wantedly.com Λ ࢧ͑Δٕज़ w 3BJMTͷ΄͔ʹʜ w 1PTUHSF42- w &MBTUJDTFBSDI w
.FNDBDIFE w 3FEJT w 1IBOUPN+4 w ։ൃɾςετʹ͜ΕΒͷαʔϏε͕ඞཁ
www.wantedly.com Λ ࢧ͑Δٕज़ w )PNFCSFXʹΑΔ։ൃڥߏங w brew updateͰ։ൃڥ͕յΕΔ w &MBTUJDTFBSDIຊମͱϓϥάΠϯͷ
όʔδϣϯΛγϏΞʹ߹Θͤͳ͍ͱμϝ w ຊ൪ͷ&MBTUJDBDIF3FEJTYͷΈ w ΠϯετʔϧεΫϦϓτͰແཧΓ όʔδϣϯΛݻఆʜ w bundle install͕ࣦഊʢಛʹ$֦ுHFNʣ
Elasticsearch on Docker
Elasticsearch on Docker w ຊ൪ͷ&MBTUJDTFBSDI%PDLFSίϯςφͱ ͯ͠Քಇ͍ͯ͠Δ w RVBZJP্ͰΠϝʔδཧ w αʔϏεʹ߹Θͤͨνϡʔχϯά
w ಠࣗࣙॻΛಉࠝ w ͜ΕΛ։ൃςετͰ͍͍ͨʜ
ϑΟʔνϟϒϥϯνͷ σϓϩΠ w ຊ൪ڥ 1SPEVDUJPO 2"ڥ 2" w
2"ॱ൪ͪ w 2"ͭͩͱΓͳ͘ͳ͖ͬͯͨ w ࣗͷϒϥϯνΛؾܰʹσϓϩΠͰ͖Δ ڥ͕΄͍͠
ϚΠΫϩαʔϏεج൫ w ੲ͔Β3BJMTͰ࣮͞Ε͍ͯͨػೳʹ͍ͭͯɺ ύϑΥʔϚϯε্ͷͨΊʹ(PͰ࠶࣮ ͢Δྫ͕͋Δ w 4ZOD8BOUFEMZ5PPMTͷΑ͏ʹɺຊମͱ ҟͳΔαʔϏεΛϦϦʔε͢Δػձ͕ ૿͑ͨ w
͜Μͳͱ͖ɺΛ͔͚ͯΠϯϑϥΛ༻ҙ͢ ΔͷͰͳ͘DockerfileΛॻ͚σϓϩΠͰ ͖ΔΑ͏ͳڥ͕΄͍͠
Docker
Docker Ͱڥߏங w ΞϓϦ୯ҐͰڥΛಠཱͤ͞ΒΕΔ w ͜ͷαʔϏεͰ&Tɺ͋ͷαʔϏεͰ &TʜͰॊೈʹରԠՄೳ w ຊ൪ڥΛखݩͰ༰қʹ࠶ݱՄೳ w
ΞʔΩςΫνϟґଘ͔Β٫Ͱ͖Δ w ඇΠϯϑϥͰ%PDLFSpMFΛॻ͖͍͢ w ͳͲͳͲ
Docker Ͱڥߏங w ෳίϯςφͷཧ͕໘ w 3BJMT൪ϙʔτͰཱͨͤͯɺ 1PTUHSF42-ͱMJOLͰͭͳ͛ͯʜ w ্ཱͪ͛ॱংߟྀ͠ͳ͍ͱ͍͚ͳ͍ 1PTUHSF42-
3FEJT 3BJMT 3000/tcp link db:postgres link redis:redis
Docker Compose
EPDLFSDPNQPTF Docker Compose w ෳͷ%PDLFSίϯςφͰߏ͞ΕΔΞϓϦ Λ؆୯ʹཧ͢ΔͨΊͷπʔϧ w :".-Ͱ֤ίϯςφͷىಈߏͱ࿈ܞΛهड़ w docker
runͷΦϓγϣϯΛߏతʹ ॻ͚ΔͨΊɺ୯ҰίϯςφͰศར w ίϚϯυҰൃͰΞϓϦͷVQEPXO TDBMJOH͕Մೳ
docker-compose.yml ຊൃදͰ$PNQPTFpMFGPSNBUWʹ ४ڌͯ͠આ໌͍͖ͯ͠·͢ db: image: postgres web: build: . command:
bundle exec rails s -p 3000 -b '0.0.0.0' volumes: - .:/myapp ports: - "3000:3000" links: - db
docker-compose.yml ຊൃදͰ$PNQPTFpMFGPSNBUWʹ ४ڌͯ͠આ໌͍͖ͯ͠·͢ db: image: postgres web: build: . command:
bundle exec rails s -p 3000 -b '0.0.0.0' volumes: - .:/myapp ports: - "3000:3000" links: - db $ docker build . web $ docker run -p 3000:3000 -v .:/myapp --links db web
$ git clone \ https://github.com/dtan4/docker-service-rails.git $ git checkout step0 Docker
Compose Ͱ Rails ΛݐͯͯΈΑ͏
w ·ͣ1PTUHSF42-ΛཱͯΔهड़ Docker Compose Ͱ Rails ΛݐͯͯΈΑ͏ db: image: postgres:9.4
w ͍ͭͮͯ3BJMTΛཱͯΔهड़ Docker Compose Ͱ Rails ΛݐͯͯΈΑ͏ web: build: .
command: bin/rails s -p 3000 -b '0.0.0.0' environment: - DATABASE_HOST=db - DATABASE_PORT=5432 - DATABASE_USER=postgres ports: - "3000:3000" links: - db
w ىಈʂ w ৽͍͠λʔϛφϧΟϯυΛ։͍ͯʜ w σʔλϕʔεͷηοτΞοϓ Docker Compose Ͱ Rails
ΛݐͯͯΈΑ͏ $ docker-compose build $ docker-compose up $ docker-compose run web bin/rake db:setup %PDLFS.BDIJOF্ͰCVJME͕ࣦഊ͢Δ߹ɺ $ docker-machine stop default $ docker-machine up default Ͱ7.Λ࠶ىಈ͍ͯͩ͘͠͞ VQ͕ࣦഊ͢Δ߹ɺ $ docker-compose stop $ docker-compose rm -f ͰίϯςφΛফͯ͠Γ͢
w ΞΫηεͯ͠Έ·͠ΐ͏ʂ Docker Compose Ͱ Rails ΛݐͯͯΈΑ͏ $ open http://$(docker-machine
ip dev):3000 # Linux など直接 Docker が稼働しているなら $ open http://localhost:3000 EFGBVMU EPDLFSWNͳͲ खݩͷڥʹ߹Θ͍ͤͯͩ͘͞
αʔόىಈޙͷॳظԽॲཧɺFOUSZQPJOU εΫϦϓτΛ͔·ͤΔํ๏͕͋Δ ͋ΘͤͯΑΈ͍ͨ IUUQTNFEJVNDPN!LFMTFZIJHIUPXFSGSBDUVSFEBQQTDED Tips #!/bin/bash bin/rake db:create bin/rake db:migrate
bin/rake db:seed exec $@ FROM ruby:2.3.0-slim MAINTAINER dtan4 # … ENTRYPOINT ["/app/entrypoint.sh"] CMD ["bin/rails", "s]
w KXJMEFSOHJOYQSPYZ w VIRTUAL_HOSTڥมͷதΛ༻͍ͯ ϧʔςΟϯάΛ࡞ w ઌ΄Ͳͷdocker-compose.ymlʹҎԼΛՃ nginx Έ߹ΘͤΑ͏ nginx:
image: jwilder/nginx-proxy ports: - 80:80 volumes: - /var/run/docker.sock:/tmp/docker.sock:ro
w 3BJMTͷϙʔτׂΛͳ͘͢ w VIRTUAL_HOSTڥมΛՃ nginx Έ߹ΘͤΑ͏ web: build: . command:
bin/rails s -p 3000 -b '0.0.0.0' environment: - DATABASE_HOST=db - DATABASE_PORT=5432 - DATABASE_USER=postgres - VIRTUAL_HOST=docker.sokushu.dev links: - db
w ىಈʂ w ઃఆͨ͠ϗετ໊ͰΞΫηε w /etc/hostsΛॻ͖͑ͯϒϥβͰ nginx Έ߹ΘͤΑ͏ $ docker-compose
up $ curl -H "Host: docker.sokushu.dev" \ http://$(docker-machine ip docker-vm)
σϓϩΠ
None
None
Heroku w git push͢Δ͚ͩͰΞϓϦ͕σϓϩΠ͞Εɺ ࣗಈͰ63-ׂΓৼΒΕΔ w 1PTUHSF42- 3FEJT .FNDBDIFEඪ४Ͱϓ ϥάΠϯ͕༻ҙ͞Ε͍ͯΔ
w ͠Β͘લʹ%PDLFSରԠͨ͠ w खݩͰಉ͡Α͏ͳߏΛ࠶ݱͰ͖Δ w ࣗલOHJOY &MBTUJDTFBSDIͳͲݐͯΒΕͳ͍
Paus w ΠϯυωγΞޠͰʮ͘͡Βʯ w docker-compose.ymlॻ͍ͯgit push͢Δ ͚ͩͰɺΫϥυ্ʹΞϓϦέʔγϣϯ͕ ىಈ͢Δ؆қ1BB4 w $PSF04
%PDLFS EUBOQBVT
Paus ʹσϓϩΠ͠Α͏ • git checkout master w docker-compose.ymlมߋ web: image:
quay.io/dtan4/docker-service-rails:latest command: bin/rails s -p 8080 -b '0.0.0.0' environment: - DATABASE_HOST=db - DATABASE_PORT=5432 - DATABASE_USER=postgres ports: - 8080 links: - db
Paus ʹσϓϩΠ͠Α͏ w IUUQQBVTXBOUFEMZDPNͰެ։伴ొ ࣗͷϢʔβ໊ 44)ެ։伴
Paus ʹσϓϩΠ͠Α͏ • ~/.ssh/configʹҎԼΛՃ Host paus HostName paus.wantedly.com User git
Port 2222 IdentityFile ~/.ssh/id_rsa ઌ΄Ͳొͨ͠ެ։伴ͷ ϖΞͱͳΔൿີ伴
Paus ʹσϓϩΠ͠Α͏ w ϦϞʔτϦϙδτϦpausΛՃ $ git remote add paus \
paus:<username>/<repository>
Paus ʹσϓϩΠ͠Α͏ w git pushͯ͠σϓϩΠʂ $ git push paus master
Paus ʹσϓϩΠ͠Α͏ σϓϩΠ͞Εͨ ΞϓϦͷ63-
Paus ΞʔΩςΫνϟ %PDLFS $PNQPTF FUDE HJUSFDFJWFE git push docker-compose up
etcdctl set 7VMDBOE http://dtan4-rails-ffe7rf8.example.com XFC EC XFC EC
Docker PaaS / IaaS
Docker PaaS / IaaS w )FSPLVΫϩʔϯ w EPLLV BMU 'MZOO
%FJT &NQJSF w ಠࣗܗࣜ w ,VCFSOFUFT "NB[PO&$4 w Πϯϑϥ͝ͱཧ w 5VUVN %$)2JP
·ͱΊ
·ͱΊ w 8BOUFEMZͷ։ൃݱͰͷॾʹର͢Δ ղܾࡦͱͯ͠ɺ%PDLFSΛ༻͍ͨڥߏஙΛ հ͠·ͨ͠ w %PDLFS$PNQPTFΛ༻͍ͯ3BJMTͱෳͷ αʔϏεΛΈ߹ΘͤͨΞϓϦ͕ߏஙͰ͖Δ Α͏ʹͳΓ·ͨ͠ w
1BB4*BB4ͷ܈༤ׂڌ࣌