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コンテナの仕組みとエコシステム - Haconiwaを通じて眺めてみる /container-...
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KONDO Uchio
October 23, 2017
Technology
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コンテナの仕組みとエコシステム - Haconiwaを通じて眺めてみる /container-ecosystem-and-haconiwa
@日本OSS推進フォーラム主催 第9回アプリケーション部会勉強会
https://connpass.com/event/68096/
KONDO Uchio
October 23, 2017
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Transcript
)BDPOJXBΛ௨ͯ͡ோΊͯΈΔ ۙ౻͏͓ͪ(.01FQBCP *OD ຊ044ਪਐϑΥʔϥϜओ࠵ୈճΞϓϦέʔγϣϯ෦ձษڧձ ίϯςφͷΈͱΤίγεςϜ
ΤϯδχΞ ۙ౻͏͓ͪ!VE[VSB (.0ϖύϘٕज़෦ٕज़ج൫νʔϜ IUUQIBDPOJXBNSVCZPSH
!VE[VSBུྺ &$αΠτɺιʔγϟϧήʔϜͷ։ൃͳͲΛܦͯɺ ΑΓ(.0ϖύϘٕज़ج൫νʔϜɺ ಉԬʹҠॅɻ͖ͳΧϨʔ5JLJɻ ஶॻʹʰύʔϑΣΫτ3VCZPO3BJMTʱ΄͔ɻ 3VCZ,BJHJʹࣗ࡞ίϯςφϥϯλΠϜ ʮ)BDPOJXBʯͷ͕࠾͞ΕΔɻ ΄͔ɺ3VCZίϯςφʹؔ͢Δ׆ಈଟɻ
Ԭ3VCZձٞ! IUUQSFHJPOBMSVCZLBJHJPSHGVLVPLB ҰൠνέοτDPNJOHTPPO
ϋογϡλά IBDPOJXBSC
ࠓͷΰʔϧ
ίϯςφͷҰาઌͷཧղΛ wʮͨͩ͏ʯ͚ͩͰͳ͍ɺίϯςφͷຊ࣭తͳͱ͜ΖΛ͔ͭΉɻ wίϯςφͷར༻γʔϯʹؔ͢Δ༷ʑͳϥϯλΠϜɺιϑτΣΞɺ ϛυϧΣΞɺن֨ͳͲΛཧ͢Δɻ w͔ͬ͠Γͱͨ͠جૅࣝΛ͚ͭͯɺʮΘΕΔʯͰͳ͘ʮ͏ʯͨ Ίʹίϯςφʹ৮ΕΒΕΔΑ͏ʹͳΓ·͠ΐ͏ʂ
ίϯςφͷҰาઌͷཧղΛ wʮͨͩ͏ʯ͚ͩͰͳ͍ɺίϯςφͷຊ࣭తͳͱ͜ΖΛ͔ͭΉɻ wίϯςφͷར༻γʔϯʹؔ͢Δ༷ʑͳϥϯλΠϜɺιϑτΣΞɺ ϛυϧΣΞɺن֨ͳͲΛཧ͢Δɻ w͔ͬ͠Γͱͨ͠جૅࣝΛ͚ͭͯɺʮΘΕΔʯͰͳ͘ʮ͏ʯͨ Ίʹίϯςφʹ৮ΕΒΕΔΑ͏ʹͳΓ·͠ΐ͏ʂ Ұॹʹษڧ͠·͠ΐ͏
)BDPOJXBͷհ
)BDPOJXB
)BDPOJXBͱɻ w-JOVYίϯςφϥϯλΠϜͷҰͭɻ w1BB4αʔϏεͰͷίϯςφར༻ͷܦݧΛͱʹ։ൃ͞Εͨ wಛ wNSVCZʹΑΓ։ൃ͞Ε͍ͯΔ w%4-ʹΑΓίϯςφͷઃఆ͕هड़Ͱ͖Δ w͞Βʹɺ༷ʑͳϑοΫΛϓϩάϥϛϯάͰ੍ޚՄೳͰ͋Δ
-JOVYίϯςφϥϯλΠϜͱʁ w0$*ʢޙड़ʣͷఆٛΛഈआ wʮઃఆΛಡΈࠐΈɺίϯςφϓϩηεΛ࡞͠ɺఀࢭɺআͳͲ༷ʑ ͳΞΫγϣϯΛߦ͏࣮ʯ w(MPTTBSZΑΓ wIUUQTHJUIVCDPNPQFODPOUBJOFSTSVOUJNFTQFDCMPC NBTUFSHMPTTBSZNESVOUJNF
l*USFBETUIFDPOpHVSBUJPOpMFTGSPNB CVOEMF VTFTUIBUJOGPSNBUJPOUPDSFBUF BDPOUBJOFS MBVODIFTBQSPDFTTJOTJEF UIFDPOUBJOFS BOEQFSGPSNTPUIFS MJGFDZDMFBDUJPOTz IUUQTHJUIVCDPNPQFODPOUBJOFSTSVOUJNFTQFD
NSVCZͱʁ wF.CFEEFE3VCZ w͍ΘΏΔΈࠐΈػث͚ͷ3VCZͱͯ͠։ൃ͞Εͨʮܰྔʯ3VCZ wͦͷ݁ՌɺόΠϯσΟϯά͕ඇৗʹॻ͖͘͢ɺϛυϧΣΞͳͲʹ ΈࠐΈ͕༰қͰ͋Δͱ͍͏ಛੑ͕͋Δɻ wݱࡏ"QBDIF)551%ɺ/HJOYͦͷଞͷʮ$POpHVSBUJPOBT$PEFʯ ͷ༻్ʹ·ΓΛݟ͍ͤͯΔ wDG-VB
FHOHY@NSVCZ wIUUQOHYNSVCZPSH w͜Ε͚ͩͷίʔυͰɺಈతͳϦόʔεϓϩΩγʹɻ
%4-ͱʁʁ w%4-%PNBJO4QFDJpD-BOHVBHFɺ͋ΔతʹಛԽͨ͠ݴޠ w)BDPOJXBͰɺ3VCZΛίϯςφ੍ޚͷͨΊͷ%4-ͱͯ͑͠Δɻ w%4-Λܦ༝ͯ͠ wίϯςφͷઃఆΛಈతʹܾఆ w༷ʑͳϑοΫʢϥΠϑαΠΫϧɺλΠϜΞτɺγάφϧϋϯυϥɺ ఆظ࣮ߦʣΛهड़
ίϯςφͷઃఆͷಈత੍ޚ wίϯςφͷߏཁૉͦͦಈతʹΈ߹Θ͕ͤՄೳͰ͋Δɻ ʢߏཁૉޙड़ʣͳͷͰɺίʔυͰܾఆͰ͖ΔͱศརͰ͋Δɻ Haconiwa.define do |c| #... client = Redis.new
"127.0.0.1", 6379, 2 data = JSON.parse(client.get(ENV[‘CONTAINER_ID’])) c.cgroup :v1 do |cg| cg[‘cpu.cfs_period_us’] = data[‘period’] cg[‘cpu.cfs_quota_us’] = data[‘quota’] end end ྫ͑ɺىಈ࣌ʹ3FEJT͔Β ίϯςφͷใΛͱ͖ͬͯͯ ಈతʹ$16ׂͷઃఆ͕Մೳ
ϑοΫͷϓϩάϥϛϯά wίϯςφىಈఀࢭϥΠϑαΠΫϧʹԠͨ͡ॲཧ w·ͨɺγάφϧϋϯυϥɺίϯςφ͕ىಈͨ͠Ұఆ࣌ؒޙʹಛఆͷॲ ཧΛΒͤΔʢλΠϜΞτʣɺఆظ࣮ߦ͢ΔॲཧΛهड़Մೳ Haconiwa.define do |c| #... c.add_handler :TTOU
do |b, _| cpu = ::Cgroup::CPU.new(b.name) cpu.cfs_quota_us = cpu.cfs_quota_us + 10000 cpu.modify end end 4*(5506Λ εʔύόΠβʔʹૹΔͱ $16ׂ࣌ؒΛ্͛Δ
ϑοΫʹΑΔ ίϯςφࣗମͷϥΠϑαΠΫϧ
ϥΠϑαΠΫϧͷ੍ޚ wίϯςφ͕ɺ͕ࣗੜ·Εɺͦͯ͠ऴྃ͢ΔαΠΫϧΛࣗͰ ੍ޚՄೳͳੈքΛߟ͑Δ w)BDPOJXBʹ͓͍ͯɺҰఆ͕࣌ؒܦաͨ͠Βࣗࣗʹ4*(5&3. ΛૹΔ͜ͱͰɺϥΠϑαΠΫϧͷ͋ΔίϯςφΛ࣮ݱͰ͖Δ c.add_async_hook min: 30 do |b|
# b.pid = ίϯςφͷPID=1 ::Process.kill :TERM, b.pid end Ͱ ࣗʹ4*(5&3.ΛૹΔ
'BTU$POUBJOFSΞʔΩςΫνϟ wϖύݚদຊࢯఏҊͷ'BTU$POUBJOFSΞʔΩςΫνϟ w'BTU$(*Λώϯτʹͨ͠ίϯςφཧετϥςδ wϓϩηεΛͭʹྨʢ*NNPSUBM.PSUBM4IPSU-JWFEʣ wʮϦΞΫςΟϒʹ্ཱ͕ͪΓɺҰఆظؒॲཧΛଓ͚Δʯ ίϯςφΛఆٛɾ࡞͢Δ wؔ࿈ൃද͝ࢀর ʮίϯςφ࣌ͷ8FCαʔϏεج൫Ϟσϧ'BTU$POUBJOFSͷݚڀൃදΛ͖ͯ͠·ͨ͠ʯ IUUQTSBOEQFQBCPDPNBSUJDMFJPUNBUTVNPUPSZ
ίϯςφϥϯλΠϜͷൺֱ
"1*ͷެ։ํ w%PDLFS ଞ0$*ʔεͷͷ ɺ-9%)551ϕʔεͰ͋Δ w-9$ɺ$ͷΠϯλϑΣʔε͕͋ΔʢMJCMYDʣɻ͔͜͠͠ͷϥΠϒϥϦ ࣗମίϯςφઃఆΛ͍͡ΔͨΊͷ"1*Λ࣋ͨͳ͍ɻ w)BDPOJXB3VCZͷΠϯλʔϑΣʔε͕͋ΓɺϓϩάϥϜͰ͖Δɻ ઃఆϑοΫ"1*Λ༻ҙ͓ͯ͠Γɺૢ࡞Մೳ wMJCIBDPOJXBతͳͷݕ౼͍ͯ͠Δஈ֊
ϑοΫͷ࣮ݱܗࣜ w%PDLFS ଞ0$*ʔεͷͷ ϥΠϑαΠΫϧ"1*ͷࢹͱ͍͏ܗͰ ࣮ݱ͢Δܗʹͳ͍ͬͯΔɻผ్ࢹˠϑοΫͷ࣮͕ඞཁɻ w-9$ઃఆʹϥΠϑαΠΫϧϑοΫ͕͋Δ wˠίϚϯυܗࣜͰɺҾͷࢦఆ w)BDPOJXB"1* %4-ͷ༷
ࣗମʹ֤छϑοΫ͕࣮͞Ε͓ͯΓɺ 3VCZͰ֤ॲཧΛهड़ՄೳɻઃఆϑοΫಉ͡ݴޠͰɻ IUUQTMJOVYDPOUBJOFSTPSHKBMYDNBOQBHFTNBOMYDDPOUBJOFSDPOGIUNMMC#$
ϑοΫͷछྨ w%PDLFSɺ-9$ʹϥΠϑαΠΫϧϑοΫͷΈͷαϙʔτ w)BDPOJXBϥΠϑαΠΫϧͷଞɺҎԼαϙʔτ wλΠϜΞτϑοΫ wఆظ࣮ߦϑοΫ wγάφϧϋϯυϥ wʢλΠϜΞτఆظ࣮ߦʹΑΓ'BTU$POUBJOFS͕࣮ݱ͍͢͠໘ʣ
Πϝʔδͱͷ࿈ܞ w%PDLFS%PDLFSIVC͔Βམͱ͔͢ɺ0$*ޓͷUBSΛར༻ w-9$ࣗͷΤίγεςϜʹMYDUFNQMBUFTΛ͍࣋ͬͯΔ wDG3BJMDBS ಠࣗͷNJDSPDPOUBJOFSTܗࣜɺπʔϧ PSBDMFTNJUI Λఏএ͍ͯ͠Δ w)BDPOJXB%4-ͰΠϝʔδ࡞αϙʔτ͢Δ wEFCPPUTUSBQMYDUBNQMBUFTͷྲྀ༻ɺHJUSFQPͷνΣοΫΞτɺ UBSͰݻΊͨSPPUGTͳͲʢ0$*ޓΠϝʔδͷαϙʔτೖΕ͍ͨʣ
·ͱΊɿද هड़ݴޠ ίϯςφઃఆ "1* ϑοΫ࣮ ϑοΫͷछྨ Πϝʔδઓུ %PDLFS SVOD (PMBOH
%PDLFSpMF ίϚϯυϥΠϯ )551"1* ϥΠϑαΠΫϧ ࢹ ϥΠϑλΠϜ %PDLFSIVC 0$*४ڌ -9$ $ JOJpMF MJCMYD ϑοΫઃఆ߲ ϥΠϑλΠϜ MYDUFNQMBUF -9% (PMBOH 1SPpMF )551"1* 3BJM$BS 3VTU 0$*४ڌ KTPO 0$*४ڌ KTPO ະαϙʔτ 0$*४ڌ NJDSPDPOUBJOFST )BDPOJXB NSVCZ $ 3VCZ%4- 3VCZ%4- 3VCZ%4- ϥΠϑλΠϜ λΠϜΞτଞछ MYDUFNQMBUF ྲྀ༻ଞ
)BDPOJXBͷࢦ͢ੈք
%PDLFS0$*ͳͲͷํੑ w͜͜·ͰͷൺֱͰɺ%PDLFSͳͲͱ)BDPOJXBͷҧ͍Λྻڍͨ͠ wݸਓతʹɺ%PDLFSͷࢦ͢ํʮ7.ͷ࠶ൃ໌ʯతʹࢥ͑Δ wϢʔβʔ͔ΒɺʮԾڥʯͷৄࡉӅ͞Ε͍ͯͯɺ ܾ·ͬͨ"1*Λܦ༝ͯ͠σϓϩΠɾΦʔέετϨʔγϣϯΛߦ͏ wDG,VCFSOFUFT#PSHʢ͜Εޙड़ʣ wͦ͏͍͏நԽࣗମɺҰͭͷํੑͰ͋Δ
$POUBJOFS&DPTZTUFNBT$PEF w)BDPOJXBͱɺͦͷपลͰࢦ͍ͨ͠ͱ͜Ζ wجຊతͳϦιʔεׂݖݶͳͲͷઃఆίʔυԽͰ͖Δ w·ͨɺଞͷϥϯλΠϜͱൺͯ๛ͳϑοΫΛ༻ҙ͠ɺίϯςφͷ ৼΔ͍ɾϥΠϑαΠΫϧΛίʔυԽͰ͖Δ w͔͜͜ΒɺίʔυԽͷൣғΛΊ͍͖͍ͯͨɻ ྫ͑ωοτϫʔΫɺϑΝΠϧγεςϜؔɺ04ͷηΩϡϦςΟɾ ࠪͷΈʢ-JOVYͷ-4.ʣͳͲίʔυԽͷൣғʹͰ͖ͳ͍͔ʁ
ίϯςφΤίγεςϜʹ ίʔυͰ౿ΈࠐΉೖΓޱʹͳΔ
͜ΕΒΛ౿·͑ͯ ίϯςφͷੈքΛπΞʔ͠·͠ΐ͏
վΊͯ ίϯςφͱԿ͔
ίϯςφొਓ͕ଟ͗͢Δ w-JOVYΧʔωϧࣗମɺγεςϜίʔϧ w֤छίϯςφϥϯλΠϜ wΦʔέετϨʔγϣϯπʔϧ܈ wΫϥυαʔϏεͦͷଞ wͳͲͳͲ wˠશମ؍Λࣔͭͭ͠ɺཧ͠·͢
ίϯςφొਓ͕ଟ͗͢Δ w-JOVYΧʔωϧࣗମɺγεςϜίʔϧ w֤छίϯςφϥϯλΠϜ wΦʔέετϨʔγϣϯπʔϧ܈ wΫϥυαʔϏεͦͷଞ wͳͲͳͲ wˠશମ؍Λࣔͭͭ͠ɺཧ͠·͢ ·ͣ ͜͜Λԡ͑͞Δ
ԾԽͱʁ wྫϋΠύʔόΠβܕʢωΠςΟϒϋΠύʔόΠβʣ wઐ༻ͷ04ɺ-JOVY,FSOFMࣗମΛϋΠύʔόΠβͱ͍ͯ͠ɺͦͷ ্Ͱ04ΛΒͤΔ wྫϗετ04ܕʢϗετϋΠύʔόΠβʣ w൚༻తͳ04ͷ্ʹɺ7JSUVBM#PYͷΑ͏ͳԾԽͷͨΊͷઐ༻ιϑτ ΣΞΛೖΕͯΒͤΔ wίϯςφܕˠ
ʮίϯςφԾԽʯ w͍ΘΏΔ,7.9FO7.XBSFW4QIFSF7JSUVBM#PYͷར༻ͱɺ wίϯςφʹΑΔʮԾԽʯɺҰઢΛը͍ͯ͠Δ wϋʔυΣΞΛԾԽ͢ΔΘ͚Ͱͳ͍ wΧʔωϧΛબΔΘ͚Ͱͳ͍ wͰɺͲ͏ͬͯಠཱͨ͠ڥΛ࡞͍ͬͯΔʁ
ίϯςφ ϓϩηεͰ͋Δ
ίϯςφ ʮʓʓʯ ͨ͠ϓϩηεͰ͋Δ
ϓϩηεΛ ίϯςφʹ͢Δ
04ϦιʔεΛϗετ͔Β͢Δ wϧʔτϑΝΠϧγεςϜʢSPPUGTʣͷಠཱԽ wDISPPU ͱ͍͏ίϚϯυΛ༻͍ͯɺ͋ΔαϒπϦʔʹ࡞ͬͨϑΝΠ ϧπϦʔʹೖΓࠐΉ͜ͱ͕Ͱ͖Δɻ wCJOENPVOUΛ༻͍ͯɺ ͦͷSPPUGTΛ͍͔ͭ͘ͷ֎෦ͷ σΟϨΫτϦͰߏஙՄೳ
wΑΓ݅ݫ͍͕͠ɺ҆શʹͳΔQJWPU@SPPU Λ͏͜ͱ͋Δ IUUQTXXXBRVJDLMPPLBUDPNMJOVYMJOVYEFWFMPQFSDISPPU
04ϦιʔεΛϗετ͔Β͢Δ w-JOVYOBNFTQBDF wϗετͱಠཱͨ͠04ͱͯ͠ͷϦιʔεΛ࣋ͨͤΔ͜ͱ͕Ͱ͖Δɻ ྫ͑ɿ wϗετ໊ w*1$ͷϦιʔε wωοτϫʔΫ IUUQTTQFBLFSEFDLDPNVE[VSBDSFBUJOHDPOUBJOFSTXJUIHPMBOH
ྫωοτϫʔΫ໊લۭؒ FUI EPDLFS WFUIIPTU WFUIHVFTU WFUIIPTU WFUIHVFTU WFUIIPTU WFUIHVFTU FH
FH ඞཁʹԠ͡/"5ͳͲ /FUXPSL/BNFTQBDFʹΑΓɺ ίϯςφϓϩηε͕ϗετͱผͷ/*$*1ΛೝࣝͰ͖Δ ͻͱͭͷ)PTU CSJEHF
04ϦιʔεΛ੍ݶ͢Δ wDHSPVQ $POUSPM(SPVQ wϓϩηεʢεϨουΛؚΉ߹͋ΔʣΛάϧʔϐϯάͯ͠ɺͦͷ୯ ҐͰϦιʔεͷར༻ঢ়گͳͲΛ੍ݶɺ͋Δ͍౷ܭใΛऔಘͰ͖Δ wDGVMJNJU SMJNJUϓϩηεʢࢠؚΉʣ୯Ґ w੍ݶͰ͖Δͷ$16ɺϝϞϦɺ*0ɺϓϩηεͳͲ
ίϯςφͷϓϩηεΛ੍ݶ͢Δྫ w·ͨGPSLCPNCରࡦ wEPDLFSͳΒ--pids-limitͰར༻ग़དྷΔ
ݖݶΛ੍ݶ͠ɺηΩϡΞʹ͢Δ w-JOVYΧʔωϧʹ͍͔ͭ͘ɺͦ͏͍͏Έ͕ଘࡏ͠ɺͦΕΒ͕ Έ߹Θ͍ͬͯ͞Δɻ wSPPUͷݖݶΛׂ͠ɺҰ෦ͷΈΛ͢ʢ-JOVYDBQBCJMJUZʣ wγεςϜίʔϧͷݺͼग़͠ΛϑΟϧλʔ͢ΔʢTFDDPNQʣ wڧ੍ΞΫηε੍ޚʢ."$FH4&-JOVYɺ"QQ"SNPSʣ
':*εΠενʔζϞσϧ wҰͭҰͭʹ͕ۭ͍͍݀ͯͨͱͯ͠ɺ ͨ͘͞ΜॏͶΔ͜ͱͰɺશͯͷ݀Λൈ͚Δ͜ͱ ඇৗʹ͘͠ͳΔɻ *NBHF$$IUUQTQJYBCBZDPNQ
ʮʓʓʯͨ͠ϓϩηε wίϯςφͷਖ਼ମɺ-JOVYΧʔωϧͷ༷ʑͳػೳΛ༻͍ͯɺ w04Ϧιʔεͷ w04Ϧιʔεͷར༻੍ݶ wݖݶͷߜΓࠐΈ wΛߦ͍ɺϗετͱಠཱ҆͠શͳঢ়ଶʹͨ͠ϓϩηεͰ͋Δͱݴ͑Δ
࣮ࡍʹͲ͏ͳ͍ͬͯΔ͔ ͍ͯΈ·͠ΐ͏
%PDLFS IUUQTXXXqJDLSDPNQIPUPT!/$$CZTB
%PDLFSͰίϯςφΛ࡞Ζ͏ w൚༻తͳ-JOVYʢࠓճ6CVOUV[FTUZʣͰ w%PDLFSΛೖΕɺίϯςφΛ࡞ͬͯΈΔ
ϓϩηε͕ग़དྷ্͕Δ wEPDLFSE aDPOUBJOFSE aSVOD
ϓϩηεͷؾ࣋ͪʹͳΔʹ wQSPDϑΝΠϧγεςϜ w͍ͯΈͨ͜ͱ͋Γ·͔͢ʁ
/BNFTQBDFΛ͍ͯΈΔ wQSPD1*%OTσΟϨΫτϦ wͦ͜ʹɺ/4Λදݱ͢ΔϑΝΠϧͷγϯϘϦοΫϦϯΫ͕͋Δɻ w௨ৗͷϓϩηεͱ͍ࠩͯ͠Δͷ͕ҧ͏ͱΘ͔Δ %FGBVMU/BNFTQBDF $POUBJOFS/BNFTQBDF
ॴଐ͢ΔDHSPVQΛ͍ͯΈΔ wQSPD1*%DHSPVQʹ͋ΔʢWͷ߹ʣɻ wରԠ͢ΔDHSPVQΛૢ࡞͢Δ͜ͱͰ͖ͨΓɻ
ݖݶ͕ߜΒΕ͍ͯΔͷΛ͍ͯΈΔ wQSPD1*%TUBUVT w$BQ ͱ͍͏ߦ͕ɺී௨ͷSPPUͱҧ͏ͱ֬ೝͰ͖Δ w͜ͷͦΕͧΕͷϏοτ͕ɺҰͭҰͭ$BQBCJMJUZʹରԠ %FGBVMUSPPU $POUBJOFSSPPU
ίϯςφͷػೳΛ୯ମͰ͏͜ͱͰ͖Δ wVOTIBSF ίϚϯυͷྫ w1*%/BNFTQBDFɺ.PVOU/BNFTQBDFɺ654/BNFTQBDFΛ ͨ͠৽͍͠γΣϧ্ཱ͕͕ͪΔɻ࣮ࡍɺQSPDͳͲΛϚϯτ͠ ͢ͱɺ1*%͕͔Βʹ wϗετ໊ಠཱ $ unshare
--fork --pid --mount --uts
ίϯςφͷػೳΛ୯ମͰ͏͜ͱͰ͖Δ wDBQTI ίϚϯυͷྫ w্ཱͪ͛ͨγΣϧͰɺSPPUͰ͋Δ͕ϗετͷ࣌ؒͷૢ࡞ʹࣦഊ ͢ΔɻʮݖݶΛ੍ݶ͞ΕͨSPPUʯͱͳΔ $ sudo capsh --drop==cap_sys_time
-- -l
͜ͷষͷ·ͱΊ wίϯςφɺʮϗετ͔ΒϦιʔεΛɾ੍ݶ͠ɺݖݶΛߜͬͯ҆ શʹʯͨ͠ϓϩηεͰ͋Δɻ wͲͷΑ͏ͳ࣮ʢ%PDLFSɺ-9$ɺͦͷଞʣͰڞ௨ͯ͠ɺͦͷΑ͏ ͳϓϩηεΛ࡞ͬͯίϯςφͱ͍ͯ͠Δɻ
ίϯςφք۾ͷۙگ
ίϯςφొਓ͕ଟ͗͢Δ w-JOVYΧʔωϧࣗମɺγεςϜίʔϧ w֤छίϯςφϥϯλΠϜ wΦʔέετϨʔγϣϯπʔϧ܈ wΫϥυαʔϏεͦͷଞ wͳͲͳͲ wˠશମ؍Λࣔͭͭ͠ɺཧ͠·͢
ίϯςφొਓ͕ଟ͗͢Δ w-JOVYΧʔωϧࣗମɺγεςϜίʔϧ w֤छίϯςφϥϯλΠϜ wΦʔέετϨʔγϣϯπʔϧ܈ wΫϥυαʔϏεͦͷଞ wͳͲͳͲ wˠશମ؍Λࣔͭͭ͠ɺཧ͠·͢ ͜ͷষ͜͜
֤छίϯςφϥϯλΠϜͷొ wίϯςφͷ࣮࣮ͦΜͳʹ͘͠ͳ͍ w؆୯ʹྨ͢Δͱ w6/*9తπʔϧʢDISPPUJQOFUOTʣɺ-9$ w%PDLFSϓϩδΣΫτͱ͔ͦ͜Βग़͖ͯͨ.PCZ wSLU$3*0ͳͲͷ։ൃɺͦΕʹ͙࣍3BJM$BS wࣗͷͨΊͷίϯςφʢKBJMJOHɺESPPUଞʣ
֤छίϯςφϥϯλΠϜͷొ wίϯςφͷ࣮࣮ͦΜͳʹ͘͠ͳ͍ w؆୯ʹྨ͢Δͱ w6/*9తπʔϧʢDISPPUJQOFUOTʣɺ-9$ w%PDLFSϓϩδΣΫτͱ͔ͦ͜Βग़͖ͯͨ.PCZ wSLU$3*0ͳͲͷ։ൃɺͦΕʹ͙࣍3BJM$BS wࣗͷͨΊͷίϯςφʢKBJMJOHɺESPPUଞʣ 0QFO$POUBJOFS*OJUJBUJWF ४ڌͷίϯςφͨͪ ʢ·ͨͦΕΛࢦ͢ͷʣ
ίϯςφͷඪ४Խ
ίϯςφͷඪ४Խ w0QFO$POUBJOFS*OJUJBUJWF IUUQTXXXPQFODPOUBJOFSTPSHɹ
0QFO$POUBJOFS*OJUJBUJWF wίϯςφͷඪ४༷Λࡦఆ͢ΔͨΊͷஂମ wϝϯόʔ$PSF04ɺ%PDLFSɺ3FE)BUɺ.JDSPTPGUɺ(PPHMF w%PDLFSͷ͍༷͕࣋ͬͯͨ͜ͷஂମʹدଃ͞ΕɺͦΕΛͱʹ ݄ʹ0$*W͕ࡦఆ͞Εͨ wྫ͑ɺίϯςφ͕ຬ͖ͨ͢γεςϜతཁ݅ɺઃఆͰ͖Δ͖߲ɺ αϙʔτ͢ΔϥΠϑαΠΫϧɺΠϝʔδͷϑΥʔϚοτͳͲΛఆٛ IUUQTHJUIVCDPNPQFODPOUBJOFSTSVOUJNFTQFD
0$*ͷنΛຬͨ͢ͱ wྫ͑ɺEPDLFSίϚϯυΛܦ༝ͯͦ͠ͷϥϯλΠϜΛ্ཱͪ͛ΒΕΔ wEPDLFS͔ΒσϑΥϧτͰ্ཱ͕ͪΔSVODɺ0$*४ڌͷίϯςφͷ Ұͭʹա͗ͳ͍ͱݟ၏͢͜ͱ͕Ͱ͖Δɻ w3BJMDBSͷྫ $ dockerd ...--add-runtime "railcar=/path/to/railcar" $
docker run -it --rm --runtime railcar hello
ΦʔέετϨʔγϣϯπʔϧͷོ w,VCFSOFUFTͱ/PNBE͕දతɻ,VCFSOFUFT͕ͱʹ͔͘ڧ͍ɻ ଞʹɺ%PDLFS$PNQPTF4XBSNͳͲؚ·ΕΔ͔͠Εͳ͍ɻ w,VCFSOFUFTͱ/PNBEɺ(PPHMFࣾͷࣾج൫ʮ#PSHʯΛϕʔεʹ ։ൃ͞Ε͍ͯΔɻ
DG*OGSBTUSVDUVSFBT$PEF w%ZOBNJD*OGSBTUSBDUVSF ͷίʔυԽͷ Ԇઢ্ʹɺίϯςφΠϯϑϥͷ ίʔυԽ͕͋Δ͔͠Εͳ͍ɻ IUUQNJ[[ZPSHCMPH
#PSHQBQFS wಛɺૂ͍ͳͲ w ϦιʔεϚωδϝϯτΤϥʔॲཧΛϢʔβ͔ΒӅ͢ w ඇৗʹߴ͍৴པՄ༻ੑఏڙ͢Δ w ສͷϚγϯΛޮΑ͍͘δϣϒΛ࣮ߦ͢Δ w43&ຊʹɺ#PSH#PSHNPOͷ͕ग़͍ͯΔͦ͏ w1BYPTͷΘΓʹ3BGU
FUDE ɺ#PSHMFUͱ1PEͳͲɺӨڹ͕ਵॴʹ IUUQTTUBUJDHPPHMFVTFSDPOUFOUDPNNFEJBSFTFBSDIHPPHMFDPNKBQVCTBSDIJWFQEG
l,VCFSOFUFTUSBDFTJUTMJOFBHFEJSFDUMZ GSPN#PSHz IUUQCMPHLVCFSOFUFTJPCPSHQSFEFDFTTPSUP LVCFSOFUFTIUNM
ίϯςφΞʔΩςΫνϟͷ ϨΠϠԽ
ίϯςφΞʔΩςΫνϟͷϨΠϠԽ w֤ॴͰఏҊ͕ࢼ͞Ε͍ͯΔɻFH.PCZ1SPKFDU wίϯϙωϯτΛϥϯλΠϜɺΦʔέετϨʔγϣϯͳͲϨΠϠԽ͠ɺ Έ߹Θ͍ͤͨ IUUQTNPCZQSPKFDUPSH
ྫϖύݚͷఏҊϞσϧ wετϥςδͷಋೖ w'BTU$POUBJOFSɺ 3BODIFSͳͲͷҐஔ͚ IUUQTSBOEQFQBCPDPNBSUJDMFJPUNBUTVNPUPSZ
ಉ࢜ͷ༷ͷఆٛͷҰྫ w,VCFSOFUFTͷ$3*ͷྫ wEach container runtime has it own strengths wKubelet
communicates with the container runtime... over Unix sockets using the gRPC framework w$3*ʹԊ࣮ͬͯ͢Εɺྫ͑,VCFSOFUFTͷ্Ͱ)BDPOJXBΛಈ͔ ͢͜ͱͰ͖ΔͰ͋Ζ͏ɻ IUUQCMPHLVCFSOFUFTJPDPOUBJOFSSVOUJNFJOUFSGBDFDSJJOLVCFSOFUFTIUNM
͜ΕΒΛ౿·͑ͯ վΊͯ
ࠞಱͱ͢Δίϯςφؔ࿈ιϑτΣΞଞ EPDLFS SVOD DSJP MYD MYE SBJMDBS IBDPOJXB LVCFSOFUFT OPNBE
VOTIBSF SLU TXBSN (,& .BHOVN DISPPU &$4 "$* SLUMFU SBODIFS NPCZ
ͷ͏ͪɺʮϥϯλΠϜʯͷօ͞Μ EPDLFS SVOD DSJP MYD MYE SBJMDBS IBDPOJXB LVCFSOFUFT OPNBE
VOTIBSF SLU TXBSN (,& .BHOVN DISPPU &$4 "$* SLUMFU SBODIFS NPCZ
ϥϯλΠϜʹ ྨ͕ඞཁ
վΊͯEPDLFSEͷϓϩηεπϦʔͷྫ /usr/bin/dockerd --debug -l debug -H fd:// --... \_ docker-containerd
-l unix:///var/run/docker/... \_ docker-containerd-shim 95b86b... docker-runc \_ /bin/bash
/usr/bin/dockerd --debug -l debug -H fd:// --... \_ docker-containerd -l
unix:///var/run/docker/... \_ docker-containerd-shim 95b86b... docker-runc \_ /bin/bash େ·͔ͳׂ୲ EPDLFSEIUUQϦΫΤετΛड͚औΔ
/usr/bin/dockerd --debug -l debug -H fd:// --... \_ docker-containerd -l
unix:///var/run/docker/... \_ docker-containerd-shim 95b86b... docker-runc \_ /bin/bash େ·͔ͳׂ୲ EPDLFSEIUUQϦΫΤετΛड͚औΔ DPOUBJOFSEEPDLFSE͔ΒͷϦΫΤετΛड͚औΓ ίϯςφڥΛηοτΞοϓͯ͠DPOUBJOFSETIJNʹ͢
/usr/bin/dockerd --debug -l debug -H fd:// --... \_ docker-containerd -l
unix:///var/run/docker/... \_ docker-containerd-shim 95b86b... docker-runc \_ /bin/bash େ·͔ͳׂ୲ EPDLFSEIUUQϦΫΤετΛड͚औΔ DPOUBJOFSEEPDLFSE͔ΒͷϦΫΤετΛड͚औΓ ίϯςφڥΛηοτΞοϓͯ͠DPOUBJOFSETIJNʹ͢ DPOUBJOFSETIJNܾ·ͬͨϓϩτίϧͰSVODଞϥϯλΠϜΛىಈ͢Δ
/usr/bin/dockerd --debug -l debug -H fd:// --... \_ docker-containerd -l
unix:///var/run/docker/... \_ docker-containerd-shim 95b86b... docker-runc \_ /bin/bash େ·͔ͳׂ୲ EPDLFSEIUUQϦΫΤετΛड͚औΔ DPOUBJOFSEEPDLFSE͔ΒͷϦΫΤετΛड͚औΓ ίϯςφڥΛηοτΞοϓͯ͠DPOUBJOFSETIJNʹ͢ DPOUBJOFSETIJNܾ·ͬͨϓϩτίϧͰSVODଞϥϯλΠϜΛىಈ͢Δ ίϯςφԽͨ͠ϓϩηεࣗମ
͜͏͍͏࣮Λ౿·͚͑ͯͯΈͨ EPDLFSE DPOUBJOFSE NPCZ DPOUBJOFSE DSJP SLUMFU SVOD SLU SBJMDBS
MYE MYD IBDPOJXB
͜͏͍͏࣮Λ౿·͚͑ͯͯΈͨ %PDLFS"1*ɺ$3*ͳͲΛ ड͚औͬͯίϯςφͷͨΊͷ४උͱ ىಈϓϩηεΛ୲͢Δ EPDLFSE DPOUBJOFSE NPCZ DPOUBJOFSE DSJP SLUMFU
SVOD SLU SBJMDBS MYE MYD IBDPOJXB ࣮ࡍʹɺΧʔωϧͷ γεςϜίʔϧΛݺͿͳͲͯ͠ ίϯςφϓϩηεΛ࡞͢Δ
͜͏͍͏࣮Λ౿·͚͑ͯͯΈͨ %PDLFS"1*ɺ$3*ͳͲΛ ड͚औͬͯίϯςφͷͨΊͷ४උͱ ىಈϓϩηεΛ୲͢Δ $PNNVOJDBUPS Ծ -PDBUFS Ծ EPDLFSE DPOUBJOFSE
NPCZ DPOUBJOFSE DSJP SLUMFU SVOD SLU SBJMDBS MYE MYD IBDPOJXB ࣮ࡍʹɺΧʔωϧͷ γεςϜίʔϧΛݺͿͳͲͯ͠ ίϯςφϓϩηεΛ࡞͢Δ
͜ͷষͷ·ͱΊ wίϯςφʹؔ͢Δಈ͖ɺίϯςφࣗͷ࣮ͷ༰Χʔωϧత ͱͱʹɺೋͭͷΛԡ͑͞Δͱྑ͍ͩΖ͏ɻ w ίϯςφʹඪ४Խͷಈ͖͕͋Γɺඪ४ʹԊͬͯతͷͨΊͷί ϯςφΛ࡞͍ͬͯ͘ಈ͖͕Մೳʹͳ͍ͬͯ͘ w ίϯςφͷΤίγεςϜɺͦΕͧΕͷίϯϙωϯτ͕ϨΠϠԽ͞ Ε࣮͕ͯू͞Ε͍ͯ͘Ͱ͋Ζ͏ɻϨΠϠࣗମɺ,VCFSOFUFTͷ $3*ͷΑ͏ͳɺϨΠϠಉ࢜ͷΠϯλʔϑΣʔεඋ͞ΕΔɻͣ
)BDPOJXBͷࠓޙ
ຊ෦ձɺιϑτ։ൃεΩϧ͕اۀʹด͡ɺۀքશମͷεΩ ϧ্ʹͳ͓ͬͯΒͣɺ͔ͭɺຊൃͷάϩʔόϧڝۀྗͷ͋ Διϑτ͕গͳ͍ݱঢ়Λةዧ͠ɺຊͷಛΛ׆͔ͨ͠044Ξ ϓϦέʔγϣϯΛ։ൃ͠ɺར༻ऀͷཱͰϏδωεϞσϧΛఏ Ҋͯ͠ɺ044ͷීٴɺ͓Αͼɺιϑτ։ൃऀͷεΩϧ্ͷ ߩݙΛࢦ͢ͷͰ͋Δ ΞϓϦέʔγϣϯ෦ձʮతͱഎܠʯΑΓ
ϏζχεϞσΡ
ϩϦϙοϓʂ ϚωʔδυΫϥυ
)BDPOJXBΛόοΫΤϯυʹ࠾༻ wͱͱʮ1BB4ϗεςΟϯάΛͬͱ͍͍ײ͡ʹ͍ͨ͠ʯͱ͍͏ Ϟνϕʔγϣϯ͔Β࢝·ͬͨ044Ͱ͋Δ͜ͱͱগͭ͠ͳ͕Δ w'BTU$POUBJOFSʴ)BDPOJXBͰɺΓ͍ͨ8FCαʔϏεΛ࡞Δ IUUQTQFQBCPDPNOFXTQSFTT
भେֶͱͷڞಉݚڀ
Ϋϥυେن࣮ݧͷج൫ͱͯ͠ wlίϯςφܕԾԽٕज़Λج൫ʹ༻͍ͨΫϥυϗεςΟϯάʹؔ͢ Δڞಉݚڀ։ൃΛ։࢝z wͪΖΜɺ͜ͷlίϯςφܕԾԽٕज़zͷॏཁͳҰ͕)BDPOJXB Ͱ͋Δʂʂʂ̍ʢઌड़ͷϚωʔδυΫϥυͷԠ༻ͳͷͰʣ wৄࡉϓϨεϦϦʔε Ͱɻࠓޙ͍͖ͬͯ·͢ IUUQTQFQBCPDPNOFXTQSFTT IUUQTXXXLZVTIVVBDKQG@@QEG
)BDPOJXBͷ ࢦ͢ੈք
࠶ܝ%PDLFS0$*ͳͲͷํੑ w͜͜·ͰͷൺֱͰɺ%PDLFSͳͲͱ)BDPOJXBͷҧ͍Λྻڍͨ͠ wݸਓతʹɺ%PDLFSͷࢦ͢ํʮ7.ͷ࠶ൃ໌ʯతʹࢥ͑Δ wϢʔβʔ͔ΒɺʮԾڥʯͷৄࡉӅ͞Ε͍ͯͯɺ ܾ·ͬͨ"1*Λܦ༝ͯ͠σϓϩΠɾΦʔέετϨʔγϣϯΛߦ͏ wDG,VCFSOFUFT#PSHʢ͜Εޙड़ʣ wͦ͏͍͏நԽࣗମɺҰͭͷํੑͰ͋Δ ΤίγεςϜͷಈ͖ɺ ͜͜Λิڧ͍ͯ͠Δͱ ཧղ͢ΔͱΘ͔Γ͍ͣ͢
࠶ܝ$POUBJOFS&DPTZTUFNBT$PEF w)BDPOJXBͱɺͦͷपลͰࢦ͍ͨ͠ͱ͜Ζ wجຊతͳϦιʔεׂݖݶͳͲͷઃఆίʔυԽͰ͖Δ w·ͨɺଞͷϥϯλΠϜͱൺͯ๛ͳϑοΫΛ༻ҙ͠ɺίϯςφͷ ৼΔ͍ɾϥΠϑαΠΫϧΛίʔυԽͰ͖Δ w͔͜͜ΒɺίʔυԽͷൣғΛΊ͍͖͍ͯͨɻ ྫ͑ωοτϫʔΫɺ04ͷηΩϡϦςΟɾࠪͷΈʢ-JOVY ͷ-4.ʣͳͲίʔυԽͷൣғʹͰ͖ͳ͍͔ʁ
ࠓίʔυԽ͍ͯ͠Δͱ͜Ζ Χʔωϧࣗମ Χʔωϧ֦ுͳͲ γεςϜίʔϧ /BNFTQBDF DHSPVQ $BQBCJMJUZ DISPPU TFDDPNQ
)PPLT /FUXPSLؔ࿈ઃఆ ΦʔέετϨʔγϣϯͱͷ࿈ܞ )BDPOJXB %4-
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