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ίϯςφΛงғؾͰಈ͔͞ͳ͍࿩ 1)1ΧϯϑΝϨϯε෱Ԭલ໷ࡇϦδΣΫτίϯ *OOPWBUPS+BQBO*OD ෋ॴ྄ &OHJOFFS

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ͬͦ͘͞Ͱ͕͢

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ίϯςφΛงғؾͰ࢖ͬͯ·ͤΜ͔ʁ

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DockerΛ࢖ͬͨ։ൃ ίϯςφͷৄࡉ͸஌Βͳͯ͘΋ग़དྷΔ

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؀ڥߏங docker-compose.yml

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docker-compose up -d ։ൃ؀ڥߏங͕Ұॠ…

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docker-compose down ࠔͬͨΒ্ཱͪ͛௚͠ docker-compose up -d

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͜ͷ··Ͱ͸ΞϗʹͳΔʂ ຊΛಡΜͰίϯςφʹೖ໳ͩ

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ίϯςφԾ૝Խ͸ɺαʔόʔԾ૝ԽͰ͸ͳ͍ɻ Α͋͘Δίϯςφೖ໳ॻͷಋೖ෦෼

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ผʹαʔόʔԾ૝Խͷ͜ͱʹৄ͘͠ͳΓ͍ͨΘ ͚Ͱ͸ͳ͍ͷ͕ͩ…

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ίϯςφͱ͸Χʔωϧͷఏڙ͢ΔػೳʹΑͬͯ ࣮ߦ؀ڥ͕෼཭͞ΕͨͦΕͧΕͷϢʔβۭؒͷ ͜ͱͰ͋Δɻ -> ͜͏͍͏આ໌͚ͩͩͱϐϯͱ͜ͳ͍ Α͋͘Δίϯςφೖ໳ॻͷಋೖ෦෼

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݁ہɺίϯςφ͕Α͘෼͔Βͳ͍

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ਅ໘໨ͳ࿩ શһ͕ৄࡉΛ͠Βͳͯ͘΋ଟ෼͍͍ ந৅తʹѻ͑ΔͳΒͦΕ΋͍͍

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Ͱ΋ɺࢲ͸஌Γ͍ͨ Ͳ͏ͳ͍ͬͯΔͷ͔ཧղ͍ͨ͠

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ͦ͜Ͱࣗ෼ͳΓʹௐ΂ͨ

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chroot 1979೥ ~ unshare 2.14~ nsenter 2.6.24~ cgroups 2.6.24~ Զௐ΂ʹΑΔίϯςφͷਖ਼ମ ※LinuxͷίϚϯυͰ͢ɻ

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Ҏ্Ͱ͢… ͱ͍͏ͷ͸ڐ͞Εͳ͍ͱࢥ͏ͷͰɻ ྫΛަ͑ͯɺͳΔ΂͘ฏқʹઆ໌͠·͢ɻ

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ྫ͑͹ɺ `alpine linux` ίϯςφ tarͷத਎ʢൈਮ)

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ͯ͞ɺ͜Ε͕Ͳ͏΍ͬͯಈ͘ͷ͔ʁ

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chroot ͍͖ͳΓίϯςφ׬੒

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ͨͩ͠ɺ͜Ε͚ͩͩͱ෼཭͕ෆे෼ ↑ϗετͷϓϩηεΛpkillͰ͖ͪΌ͏

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unshare namespaceΛ࡞੒ͯ͠ɺϓϩηεΛ෼཭

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cgroups /sys/fs/cgroup഑ԼͰઃఆΛݟΕΔ ϓϩηεάϧʔϓͷϦιʔεར༻Λִ཭ɾ੍ݶ

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unshare͞ΕͨϓϩηεʹೖΕΔ `name space enter` `docker exec` ͱ͔ʹ࢖ΘΕ͍ͯΔͱࢥ͏ nsenter

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ίϯςφΛ࣮ݱ͢Δ4ίϚϯυ جຊ͸ chroot ϓϩηεΛ unshare Ͱ෼཭ ϦιʔεΛ cgroup Ͱ෼཭ nsenter Ͱ෼཭ͨ͠ϓϩηεʹ৵ೖ

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جຊ͸ chroot Linux͔ΒɺLinuxͰ࣮ߦՄೳͳϑΝΠϧΛ࣮ߦ

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྆ํLinux͔ͩΒ࣮ߦͰ͖Δ LinuxΧʔωϧͷABI Application Binary Interface ݫ֨ͳޙํޓ׵ੑ

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Ұݟ alpinelinux ͕Ծ૝OSͷΑ͏ʹݟ͑Δ ࣮ଶ͸ϓϩηε࣮ߦ

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ɹchroot΋docker΋ ࣮ߦ࣌ʹɺඞͣίϚϯυΛࢦఆ docker run -it alpine:latest sh ͦ͏͍͏͜ͱͩͬͨͷ͔…

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ίϯςφग़ͨͯͷ͜Ζ ୡਓ͕͓ͨͪͬ͠Όͬͯ·ͨ͠ɻ ʮίϯςφͬͯ chrootͩΑͶʯͱ Α͏΍͘…ҙຯΛཧղͰ͖·ͨ͠

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͔͠͠ɺผͷٙ໰͕༙͍ͯ͘Δ

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Docker For Mac ͸ʁ Docker For Windows ͸ ? Mac΋ɺWindows΋Linux͡Όͳ͍ ͳΜͰ Dockerಈ͘ͷʁ

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Docker for Mac Windowsͷ৔߹΋ಉ༷ LinuxKitͱ͍͏ίϯςφ༻Linux্Ͱಈ࡞

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ྫ͑͹ MacͷClangͰ HelloWorldͷ࣮ߦϑΝΠϧΛ࡞੒ Linuxίϯςφ্Ͱ࣮ߦ -> ಈ͔ͳ͍ɻ Linux͡Όͳ͍͔Βɻ

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UbuntuͰ HelloWorldͷ࣮ߦϑΝΠϧΛ࡞੒ DockerͰ࣮ߦ -> ಈ͘

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Linux -> Linuxͷ࣮ߦՄೳϑΝΠϧ -> ಈ͘ Linux -> OSXͷ࣮ߦՄೳϑΝΠϧ -> ಈ͔ͳ͍ ཧ۶͸୯७

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LXCͱ͔LibContainerͱ͔runCͱ͔ Containerdͱ͔৭ʑมΘ͍ͬͯͬͯΔ͕ جຊ͸มΘΒͳ͍ɻ

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͜͜·ͰΛཧղ͢Ε͹ DockerͰಈ࡞͢Δ Windowsίϯςφ͕ແ͍ཧ༝ OSXίϯςφ͕ແ͍ཧ༝ ׬શʹ෼͔Γ·͢ΑͶʁ

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ίϯςφ͸ Linux ͔Β Linuxͷ࣮ߦՄೳϑΝΠϧΛಈ͔ٕ͢ज़͔ͩΒ

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͕࣌ؒ༨ͬͯͨΒDEMO

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Ҏ্ɺ͝ਗ਼ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠ɻ