個人で使ってみた Docker と CoreOSとか

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ݸਓͰ࢖ͬͯΈͨ Docker'ͱ'CoreOSͱ͔ ٕज़νʔϜษڧձ!#199 2014/7/11 ٕज़νʔϜ!੕໺߶ࢤ

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໨࣍ ংষ ຊ೔ͷ໰୊ҙࣝ ຊ୊ *"Docker"࢖͍ํ *"CoreOSͰͷBootstrapʙDeploy *"Dockerﬁle"CIͷఏҊ

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=begin ংষ (ʙϓϩϩʔάʙ)

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ݸਓͷ࿩

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2009೥ࠒ

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ॳΊͯݸਓͰ͘͞ΒVPSΛआΓ·͠ ͨ

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आΓͨVPSʹ͋Γ͕ͪͳ͜ͱ in#Զ

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develop'>'(trial&error)'>'deploy

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deploy'>'(..਺ϲ݄ޙ..)'>'deploy

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ͳΜ͔ࢮ͵

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(ཧ༝͸Θ͔ΒΜ)

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(ཧ༝͸ຊ౰ʹΘ͔ΒΜ)

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৭ʑ͋Γ͗ͯ͢Α͘Θ͔Βͳ͍

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௚઀ͳݪҼ͸Α͘Θ͔ΒΜ͚Ͳ ؒ઀తͳݪҼ͸Α͘Θ͔ͬͯΔ

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ϛυϧ΢ΣΞ!΁ͷมߋ MySQL/Apache

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౓ॏͳΔ trial&error

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ཁ͸ɺ్தͰߦͬͨมߋΛه࿥ͯ͠ ͍ͳ͔ͬͨ

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Πϯϑϥߏங΋ه࿥Λͱ͓ͬͯ͘ (ίʔυʹམͱ͓ͯ͘͠) ͷ͕େࣄͩͱૉਓ໨ʹ௧ײ

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ͨͩɺ్தͰग़ձͬͨਆπʔϧ

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σϓϩΠͷੈ୅ͷ؅ཧ

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ηοτΞοϓͷํ๏͸๨Ε͕ͨ ͦͷޙͷӡ༻͕҆৺ʹͳͬͨ(ؾ͕ ͢Δ)

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!!!

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2014೥ࠒ

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ฐࣾೖࣾ

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৬৔Ͱͷ࿩

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Cͷͭ͘ΞϨ"ʹՃ͑

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Cͷͭ͘ΞϨ"΋

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ࢥ͑͹ฐࣾ

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rubyΛ࢖͏ਓ%/%ٕज़νʔϜͷਓ

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໿115% (੍࡞͕erb࢖͍ͬͯΔ) (஫ɿԶ໨ઢ)

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͋Δछͷඞવ

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ʮϓϩϏδϣχϯάͷ̏૚ʯ h"p:/ /mizzy.org/blog/2013/10/29/1/ h"p:/ /en.oreilly.com/velocity2mar2010/public/schedule/detail/ 14180

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Orchestra)on Fabric,(Capistrano,(MCollec2ve Conﬁgura)on Puppet,'Chef,'AWS'OpsWorks Bootstrapping Kickstart,*Cobbler,*OpenStack,*AWS

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ؾ෼ͷ໰୊ (஫ɿग़యԶ)

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Orchestra)on (ʆ˜´) Conﬁgura)on (;´ρ`) Bootstrapping (ʆ˜´)

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Conﬁgura)on (;´ρ`)

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ႈ౳.͕Μ͹Δ!

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ႈ౳.͕Μ͹ΕΔ?

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͋ΔͭΒΈͷ͋ΔPR

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͋ΔͭΒΈͷ͋ΔPR2

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ࠓͭΒ͍࿩͕͍ͬͺ͍ग़ͨؾ͕͠· ͢ (ͳΜͰݹ͍nkfೖΕΔͷɺͱ͔͸๨Εͯͩ͘ ͍͞)

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ႈ౳.͕Μ͹ΕΔ?.!.!.!

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୭͕ѱ͍ͷ͔

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ϓϩϏδϣχϯάͷ̏૚

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Orchestra)on (ʆ˜´) Conﬁgura)on (;´ρ`) Bootstrapping (ʆ˜´)

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ͯ͞ɺ·ͨݸਓͷ࿩

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͠ΐ΅͍Τϯλϝܥ()WebΞϓϦΛ ӡ༻ heroku͕৸ͳ͍ఔ౓ͷPV rails4'/'MongoDB'/'heroku

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Ұࡢ೥͋ͨΓ͔Β ӡ༻ͩͯ͠͠ deployʹ͍ͭͯࢸͬͨ݁࿦

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heroku࠷ڧઆ

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$"git"push"heroku"master

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ͭ·Γ"Orchestra*on"͚ͩ

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"Conﬁgura*on"/"Bootstrapping"͸ରԠෆཁ

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جຊແྉ

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ϛυϧ΢ΣΞ͸ΞυΦϯ(ແྉ/༗ྉ)

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database logging metrix worker

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͍͟ͱͳΕ͹͓ۚͰղܾͰ͖Δ (͠ɺ͍͍ͨͯͳΜͱ͔ͳΔ)

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(ʆ˜´)

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ݸਓͰ༡Ϳ෼ʹ͸࠷ڧ͕ͩɻɻɻ ආ͚ΒΕͳ͍໰୊͕͋Δ

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ϨΠςϯγ

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(ແྉΞυΦϯͰ)MySQLαʔόήοτ΍ʔ ! ೔ຊͷWEBαʔόʔ͔ΒΞΫηε ! ೔͕฻ΕΔ

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GoogleSpeedInsight ! ੒੷ΘΖ͠ (ͨͩͬͪ͜͸ͲͪΒ͔ͱ͍͏ͱύϑΥʔϚϯ ε?)

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ΞϨͷTokyoϦʔδϣϯ࢖͑͹͑͑ ΍Ζ

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VPS࢖͑͹͑͑΍Ζ

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(Herokuָ͡Όͳ͍Ͱ͔͢...)

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ʙϓϩϩʔά =end

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ຊ೔ͷ໰୊ҙࣝ

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C͕ͭ͘ΞϨ͕ͭΒ͗͢Δ গͳ͘ͱ΋ݸਓͰ͸Ϡμ heroku͕ྑ͍ͷ͸ɺOrchestra,on͚͔ͩͩΒ ΋͠VPSͰӡ༻͢Δͱͨ͠Β? ϨΠςϯγղܾͯ͠Έ͍ͨ

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TRY:%VPS΁ͷճؼ(ͭΒͦ͏)

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࡞ۀ͸ίʔυͰ࢒͍ͨ͠ Inﬂastructure+as+Code chefݏ͍ͳࢲ͸ɺͲ͏͢Ε͹ྑ͍͔

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ຊ୊ *"Docker"࢖͍ํ(·ͣ࠷ॳʹઆ໌) *"CoreOSͰͷBootstrapʙDeploy *"Dockerﬁle"CIͷఏҊ

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CoreOSΛVPSͰ࢖͏

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CoreOS

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Docker'on'CoreOS

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Conﬁgura)on/Orchestra)on systemd/Docker Bootstrapping ipxe%+%VultrVPS

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Docker'νϡʔτϦΞϧ

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Dockerͱ͸

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୺తͳઆ໌ h"p:/ /www.ryuzee.com/contents/ blog/6952

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Ծ૝Խٕज़ "ίϯςφ୯ҐͰύοέʔδϯά VirtualBoxͱ͔ͱҧͬͯߴ଎ɺΦʔόʔϔου͕গͳ͍ɻchrootʹ ͍ۙɻLXCʹ͸ґଘ͠ͳ͘ͳ͍ͬͯΔ ίϯςφ͝ͱʹID͕ৼΒΕΔ ίϯςφ͸ࠩ෼อଘͳͷͰϩʔϧόοΫ΋؆୯ Ұճ࡞Ε͹Ͳ͜Ͱ΋ಈ͘ DockerﬁleͰίϯςφΛ࡞੒͢Δ Dockerﬁleͷ1ߦ͝ͱʹίϯςφID͕ϑϥΕΔ"

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Կ͕͏Ε͍͠ͷʁ "ߴ଎ʹىಈ͢ΔɻैͬͯCI༻ʹ࢖ͬͨΓɺChefͷΫοΫϒοΫͷ ࣮ݧ؀ڥʹ࢖ͬͨΓɺ։ൃ؀ڥʹ࢖ͬͨΓ৭ʑศརɻ΋͏ຊ൪؀ ڥͰ࢖͍ͬͯΔྫ΋ଟ਺ ίϯςφ಺ʹด͡ࠐΊΔ͜ͱͰϙʔλϏϦςΟ͕͕͋ΔɻΞϓϦ έʔγϣϯͷσϓϩΠઓָུ͕ͳํʹେ͖͘มΘΓ͏Δ ࠩ෼Ͱ؅ཧ͞ΕΔͷͰ഑෍ͱ࠶ར༻͕؆୯ ͍ΖΜͳ؀ڥͰಈ͘ DockerﬁleΛ࢖ͬͯίʔυͰΠϯϑϥΛ؅ཧͰ͖Δ"

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(΍Γ·͠ΐ͏)

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centos(vagrant)Ͱ΍ͬͯΈ·͢

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$"vi"Vagrantﬁle Vagrant.configure('2') do |config| config.vm.box = "hfm4/centos7" config.vm.network :private_network, ip: "192.168.100.101" config.vm.network :forwarded_port, guest: 10080, host: 10080 end

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$"vagrant"up"&&"vagrant"ssh

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Πϯετʔϧɾىಈ֬ೝ $"sudo"yum")y"install"docker)io $"sudo"service"docker"start $"sudo"docker"ps

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άϧʔϓͷ௥Ճ $"sudo"groupadd"docker $"sudo"gpasswd"+a"vagrant"docker $"sudo"service"docker"restart

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ίϯςφΛ࡞Δ·Ͱͷ࡞ۀ ஫ɿग़యԶ

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$"mkdir"mydocker $"cd"mydocker $"vi"Dockerﬁle

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First&Stage

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The$ﬁrst$Dockerﬁle$instruc1on "FROM"

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ͳʹ͸ͳ͘ͱ΋FROMͱॻ͘

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FROM debian:jessie

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͓ΊͰͱ͏! ͜ΕͰ׬ᘳͳDockerﬁle͕ग़དྷ্͕ Γ·ͨ͠! ɹ ɹ (photo:'zarpie.deviantart.com/art/Twilight8Sparkle8is8Happy8280187353)

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ͭ͗͸ docker buildͯ͠Έ·͠ΐ͏

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$ docker build -t hoshinotsuyoshi/perfect . (࠷ޙͷ.͕ΧϨϯτσΟϨΫτϦͷDockerﬁle ୳ͯ͠Δ)

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$ docker images ͍ͤ͘͞ɹ͔͘ʹΜὑ

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͓ΊͰͱ͏! ͜ΕͰ͸͡Ίͯimage͕ग़དྷ্͕Γ ·ͨ͠! ɹ ɹ (photo:'minnie,themousekid.deviantart.com/art/Happy,Birthday,Cake,181149361)

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run͠·͢ $"docker"run"hoshinotsuyoshi/ perfect

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ಈ͍͔ͨ? $"docker"ps

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$"docker"ps"+a "Exit(0)"

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docker'runͷUSAGE Usage:'docker'run'[OPTIONS]' IMAGE'[COMMAND]'[ARG...]

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࠶ͼrun͠·͢ $"docker"run" hoshinotsuyoshi/perfect//bin/bash

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$"docker"ps"+a "Exit(0)"

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docker'runͷΦϓγϣϯ !i,$!!interac+ve=false$(Keep$stdin$ open$even$if$not$a6ached) !t,$!!%y=false$(Allocate$a$pseudo!%y)

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࠶ͼrun͠·͢ $"docker"run"+it"hoshinotsuyoshi/ perfect"/bin/bash

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͓ΊͰͱ͏! jessieͷίϯςφ͕ಈ͍ͨ sshΈ͍ͨʹೖΕͨ! ɹ (photo:'h(ps:/ /www.ﬂickr.com/photos/goodncrazy/9680244249)

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$"cat"/etc/debian_version

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͜ͷdebianίϯςφൈ͚·͢ $"exit"100

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֎͔ΒݟΔͱɻ100͕ه࿥͞Εͯ Δɻ $"docker"ps"+a

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Next%Stage...

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"CMD"

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"CMD" ... docker'run'ͨ͠ͱ͖ͷ σϑΥϧτͷಈ͖Λఆٛ͢Δ

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FROM%debian:jessie CMD%["/bin/bash",%"6c",%"for((i=1;i<=1000;i+=1));%do%sleep%1%;%echo% \"hello%debian%$i%Gmes\";%done"]

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$"docker"build"-t"hoshinotsuyoshi/ perfect2". ͦͯ͠ $"docker"images

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͜ΕΛrunͯ͠Έ·͢ $"docker"run"++name"perfect2" hoshinotsuyoshi/perfect2 (ࠓճ͸"##nameΦϓγϣϯͰίϯςφ໊ࢦఆ ͯ͠Έ·͢)

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(ࢭΊํΘ͔Μͳ͍)

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(ผ୺຤ͱ͔ͰࢭΊ·͢)

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ࠓ౓͸!dΦϓγϣϯ(detach)Ͱrun͠ ·͢ $"docker"run"+d"++name"perfect2" hoshinotsuyoshi/perfect2

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(ίϯςφID͕͔͖͑ͬͯͨ)

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த਎ΛݟΔʹ͸docker'a)ach $"docker"a*ach",,sig,proxy=false" perfect2

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(docker(rm(*fͰstop(+(rm)

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࣮͸ run࣌ͷ࠷ޙʹίϚϯυΛ༩͑Δͱ CMDͷ಺༰্͕ॻ͖͞ΕΔ $"docker"run"++name"perfect2" hoshinotsuyoshi/perfect2"/bin/echo" hey

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(docker(rm(*fͰstop(+(rm)

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Next%Stage...

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"RUN"

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"RUN" ... Ϗϧυதʹ࣮ߦ͍ͨ͠ίϚϯυΛࢦ ఆ͢Δɻ

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DockerﬁleʹRUNΛॻ͍ͯΈΔ

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FROM%debian:jessie RUN%apt3get%update RUN%apt3get%3y%install%apache2

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$"docker"build"-t"hoshinotsuyoshi/ apache". $"docker"images

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(apacheಈ͔͢ʹ͸Ͳ͏͢Ε͹͍͍ Μ͚ͩͬ)

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$"docker"run"+it"hoshinotsuyoshi/ apache"/bin/bash $"which"apache2 $"service"apache2"start

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ͪΐͬͱ࿬ಓ $"vagrant"share

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...Ҏ্ɺجຊͷinstruc)on+3ͭΛݟ ͖ͯ·ͨ͠ FROM CMD RUN

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ͦͷଞͷDockerﬁle)instruc/on

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ADD#...#ﬁle΍dirΛίϯςφʹίϐʔ͢ΔΑ MAINTAINER#...#ϝϯςφΛೖΕΔ EXPOSE#...#ۭ͚Δϙʔτ൪߸Λࢦఆ ENV#...#؀ڥม਺Λࢦఆ COPY#...#΄΅ADDͱҰॹ?(URLࢦఆͰ͖ͳ͍Β͍͠) ENTRYPOINT#...#CMDͷ਌ੰɺrunͰΦʔόʔϥΠτ͞Εͳ͍ VOLUME#...#ϗετ΍ଞίϯςφͱͷؒͷϚ΢ϯτϙΠϯτ USER#...#Ϗϧυͷ్தͰϢʔβม͑Δ WORKDIR#...#Ϗϧυͷ్தͰσΟϨΫτϦม͑Δ ONBUILD#...#docker0.8Ͱొ৔ɻࢠϏϧυ޲͚ͷ໋ྩΛॻ͚Δɻ

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...͜ΕͰDockerﬁleͷinstruc/onશ ෦!

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Dockerﬁleͷઆ໌ऴΘΓ

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Docker'دΓಓ

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ϝϞϦࢦఆͱ͔΋ग़དྷΔΒ͍͠ $"docker"run"+c"256"+m"512m"+it" hoshinotsuyoshi/perfect2"/bin/bash

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ϓϥΠϕʔτͳϨδετϦʹ͍ͭͯ $"docker"pull"registry ͱ͔΍ΔͱͰ͖ΔΒ͍͠

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Docker'دΓಓ͓ΘΓ

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Dockerﬁle)σϓϩΠͷͨΊͷςΫχ οΫ

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Dockerﬁleͱ ࠩ෼Ϗϧυ

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ࣗ෼ͷϕʔεΠϝʔδΛ࡞͓ͬͯ͘ ͱศརͱ͍͏࿩

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ͭ·Γ̎ͭͷΠϝʔδΛ༻ҙ͢Δ [Conﬁgura*onࡁΈͷ΍ͭ] [Orchestra*on༻ͷ΍ͭ]

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[Configura*onࡁΈ] ϛυϧ΢ΣΞΠϯετʔϧࡁΈ hoshinotsuyoshi/ruby3mongo h"ps:/ /registry.hub.docker.com/u/hoshinotsuyoshi/mongo6ruby/ h"ps:/ /github.com/hoshinotsuyoshi/Dockerfiles/blob/master/ mongo9ruby/Dockerfile

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[Orchestra*on༻] WEBΞϓϦͷσϓϩΠ hoshinotsuyoshi/actress h"ps:/ /registry.hub.docker.com/u/hoshinotsuyoshi/actress/ h"ps:/ /github.com/hoshinotsuyoshi/Dockerﬁles/blob/master/ actress/Dockerﬁle

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Conﬁgura)onࡁΈͷ΍ͭΛ࠶ར༻ registry.hub.docker.comʹΞοϓͰ ͖Δ Ϗϧυ͕ૣ͍ͷ͕͏Ε͍͠

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ͰɺͲ͏σϓϩΠ͢Δͷ͕͔ͬ͜ྑ ͍͔ (docker(runͰ΋͍͍Μ͚ͩͲ)

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CoreOSྲྀʹsystemdͰ΍ͬͯΈΔ

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ܰ͘ɹCoreOSͷઆ໌

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খͯ͘͞ݎ࿚ͳίΞ Ϋϥελ!+!ίϯςφ

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࠼Δཁૉ docker'...'ίϯςφͷ؅ཧ systemd'...'init.dͷ୅ସ etcd%...%ઃఆ৘ใΛڞ༗Ͱ͖ΔKVS ﬂeet$...$Ϋϥελ؅ཧ

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cent7ʹ͸systemd͸ೖ͍ͬͯΔ

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ࠓ೔͸͔ͤͬ͘ͳͷͰsystemd cent7Ͱ΍Γ͍ͨͱࢥ͍·͢!!

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(systemd͋·Γௐ΂ͳ͔ͬͨͷͰ ͱ͍͏͔͘͢͝೉͔ͬͨ͠ͷͰ͋·Γ ͭͬ͜·Εͯ΋౴͑ΒΕ·ͤΜ)

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طଘͷUnitϑΝΠϧ $"ls"%alF"/etc/systemd/system

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͜Μͳײ͡ʹฤू $"sudo"vi"/etc/systemd/system/ docker1actress.service

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[Unit] Description=Actress Service After=docker.service Requires=docker.service [Service] User=root ExecStart=/bin/sh -c \ "/usr/bin/docker run --name actress -p 10081:3000 hoshinotsuyoshi/actress" ExecStop=/usr/bin/docker rm -f actress [Install] WantedBy=local.target

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[Unit] [Unit] Description=Actress Service After=docker.service Requires=docker.service

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[Service] [Service] User=root ExecStart=/bin/sh -c \ "/usr/bin/docker run --name actress -p 10081:3000 hoshinotsuyoshi/actress" ExecStop=/usr/bin/docker rm -f actress

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[Install] [Install] WantedBy=local.target

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$"sudo"systemctl"daemon/reload $"sudo"systemctl"start"docker0 actress"#"Start! $"sudo"systemctl"stop"docker0 actress"#"Stop! ·ΔͰserviceͷΑ͏ʹѻ͑Δ

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(σϞ)

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·͞ʹImmutable

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ۘࠂ ͔͜͜Β͋·Γࢿྉͳ͍

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(σϞ) ΦϨΦϨεΫϦϓτىಈ͠·͢ CoreOSαʔόʔௐୡσϞ ࠷ऴతʹ͸Jenkins͓ͬ͞ΜΛಈ͔ ͍ͨ͠

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ΦϨΦϨεΫϦϓτͨͪ script1:)VPSങͬͯscript2/3Λىಈ script2:)ipxe script3:)cloud.conﬁg

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script1:)VPSങͬͯscript2/3Λىಈ

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͜ͷͨΊʹvultr&APIୟ͘Gem࡞ͬͨ

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script1:)VPSങͬͯscript2/3Λىಈ gistʹ͓͍ͨ h"ps:/ /gist.github.com/hoshinotsuyoshi/627362efc554e2fd9a5f

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script2:)ipxe herokuʹ͓͍ͨ (Vultrͷipxechainurl͸ɺh,psͰ͸͏·͍͔͘ͳ͔ͬ ͨɻ) h"p:/ /young+dawn+7740.herokuapp.com/script.txt CoreOSެࣜϖʔδͷ಺༰Λࣸܦ

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script3:)cloud.config secret&gistʹஔ͍ͨ h"ps:/ /gist.githubusercontent.com/hoshinotsuyoshi/ 4421f1d7754db9629903/raw/ 7b005f4e8438434f48b7f03b50946c9c6731c0a1/testB config.config CoreOSެࣜϖʔδͷ಺༰͔Β࡞੒

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ruby%setup.rb͢Δ͚ͩͰ αʔό͕ىಈͯ͠ Jenkinsಈ͍ͨ! (σϞ͓ΘΓ)

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ͰɺϨΠςϯγͷ໰୊

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before h"p:/ /xn((o1q8h80u333a.xn((u9jw89o.com/

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a"er h"p:/ /108.61.201.67

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before

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a"er

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(ʆ˜´)

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No content

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·ͱΊ(ʆ˜´) CoreOS'+'cloud-conﬁgͰBootstrapʙ Orchestra7on·ͰͷશͯΛهड़Ͱ͖Δ! VultrͰϨΠςϯγͷ໰୊͸ղܾͨ͠!

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ࡶײ Bootstrap͔ΒOrchestra,on·ͰΛίʔυԽ! CI༻్ʹ͸޲͍ͯΔ ͋ͱɺηοτΞοϓ͕೉͍͠αʔϏεͱ͔͕ ͍͍͔΋ ex.$Jenkinsɺ؂ࢹαʔόʔ