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cgroupとLinux Capabilityの活用 / rcon and capcon internals #lxcjp
MATSUMOTO Ryosuke
PRO
April 23, 2016
Technology
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cgroupとLinux Capabilityの活用 / rcon and capcon internals #lxcjp
MATSUMOTO Ryosuke
PRO
April 23, 2016
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Transcript
DHSPVQͱ-JOVY$BQBCJMJUZͷ׆༻ GMOϖύϘגࣜձࣾ γχΞɾϓϦϯγύϧΤϯδχΞ MATSUMOTO, Ryosuke @matsumotory 2016/04/23 ୈ9ճ ίϯςφܕԾԽͷใަձˏԬ SDPOBOEDBQDPO
JOUFSOBMT
࣍ ίϯςφཁૉٕज़ SDPOJOUFSOBMT DBQDPOJOUFSOBMT ·ͱΊ
ίϯςφཁૉٕज़
ϓϩηε੍ޚٕज़ DHSPVQ ϓϩηεάϧʔϓͷϦιʔε੍ݶɾִ SDPOΛ։ൃ -JOVYDBQBCJMJUZ
εϨου୯Ґʹ੍ޚՄೳͳಛݖάϧʔϓ܈ DBQDPOΛ։ൃ
DHSPVQ
DHSPVQ ϓϩηεάϧʔϓͷϦιʔε੍ޚ $16ɺ*0ɺϝϞϦ DHSPVQGTʹΑΔ*' ϑΝΠϧϕʔεͷૢ࡞
ୈճɹ-JOVYΧʔωϧͷίϯςφػೳʦʧᴷDHSPVQͱʁʢͦͷʣ SFGIUUQHJIZPKQBENJOTFSJBMMJOVY@DPOUBJOFST
DHSPVQͷ׆༻ྫ NPE@NSVCZʹΑΔ"QBDIFͷϦιʔε੍ޚ 8FCαʔόͷϦΫΤετ୯Ґ ͜ͷυϝΠϯ܈$16Ҏ ͜ͷಈతίϯςϯπ$16
͜ͷಈతίϯςϯπ*0Λ.CQT ͜ͷಈతίϯςϯπಛఆͷ$16ͷίΞ SFGIUUQCMPHNBUTVNPUPSKQ Q
-JOVY$BQBCJMJUZ
ΞΫηε੍ޚϞσϧͷ෮श ҙΞΫηε੍ޚʢ%"$ʣ ͕ࣗ࡞ͬͨϦιʔεͷΞΫηε͕ܾࣗఆ 6/*9ͷඪ४తͳϞσϧ ڧ੍ΞΫηε੍ޚʢ."$
͕ࣗ࡞ͬͨϦιʔεʹશʹΞΫηεͰ͖ΔΘ ͚Ͱͳ͍ɻཧऀ͕ܾఆ 4&-JOVYɺ50.0:0-JOVY
-JOVYDBQBCJMJUZ ैདྷͷ֊ͷ%"$ݖݶϞσϧͷ֦ு εϨου୯Ґʹ੍ޚՄೳͳಛݖάϧʔϓ εϨουछྨͷDBQBCJMJUZTFUΛ࣋ͭ 1FSNJUUFEɾ&⒎FDUJWFɾ*OIFSJUBCMF
ͦΕΒͷΈ߹ΘͤͰDBQCJMJUZͷݖݶΛ੍ޚ
1FSNJUUFEͱ&GGFDUJWF 1FSNJUUFEڐՄ &⒎FDUJWFͷηοτɾΞϯηοτ͕Մೳ 1FSNJUUFEΛΞϯηοτ͢ΔͱΕͳ͍ &⒎FDUJWF࣮ޮ
࣮ࡍͷݖݶՄ൱νΣοΫ&⒎FDUJWFΛݟΔ 1FSNJUUFE͕͋ΕΞϯηοτޙͷ࠶ηοτ͕Մೳ
-JOVYDBQBCJMJUZ άϧʔϓʹׂ͞Ε͍ͯΔ VJEɾHJEมߋͷಛݖ ಛݖϙʔτʢҎԼʣͷόΠϯυಛݖ DISPPUͷಛݖ
SFCPPUͷಛݖͳͲͳͲ SFGIUUQTMJOVYKNPTEOKQIUNM-%1@NBOQBHFTNBODBQBCJMJUJFT IUNM
$BQBCJMJUZͷ׆༻ྫ NPE@QSPDFTT@TFDVSJUZ "QBDIFIUUQEͷTV&9&$ͷεϨου൛ ϓϩηε୯Ґͷݖݶ͔ΒεϨου୯Ґ ݖݶͷίετΛεϨουͷੜɾഁغʹݮ
None
None
ΞΫηε੍ޚϞσϧͷࠓޙ ࠓͳ͓ೋ֊ͷݹయతͳݖݶϞσϧ ͍͍͕ͦ͢ΕͰྑ͍ͷ͔ʁ ྫ͑ҰൠϢʔβ੍͕ޚͰ͖ͯɺࢠϓϩηεʹ࣌͢ʹ ੍ݶͯ͢͠ͱ͔Γ͍ͨʜ͋ΕͬͰ͖Δʁ աڈͷݚڀͰͬͱෳࡶͳݖݶϞσϧ͕͋ͬͨ
04ͰΕΔ͜ͱͲΜͲΜෳࡶʹͳ͍ͬͯΔ ৽ͨͳೋ֊Ҏ্ͷݖݶϞσϧΛݕ౼ͯ͠ΈΔ
SDPO
UIBOLTUP!SSSFFFZZZ
ίϚϯυͷϦιʔε੍ޚ IUUQTHJUIVCDPNNBUTVNPUPSSDPO ࣮ߦ͍ͨ͠ίϚϯυͷϦιʔε੍ޚ ࣮ߦதͷϓϩηεͷϦιʔε੍ޚ $16ɺϝϞϦɺ*0ɺάϧʔϓԽ
ϦιʔεมԽ͔ΒॲཧΛίʔϧόοΫՄೳ
SDPOͷྑ͍ॴ ࣮ߦޙఀࢭޙʹDHSPVQͷΰϛআ ࣮ߦ࣌ͷίϚϯυΛϫϯϥΠϯͰ੍ޚ DHSPVQ͕͋Ε͑Δ MJCDHSPVQΛTUBUJDMJOL
NSVCZͰϫϯόΠφϦʢHMJCDґଘʣ %PDLFS֤ͬͯछHMJCDͷόΠφϦΛެ։
͍Ͳ͜Ζͷྫ ΫϥΠΞϯτͰ-JOVYͬͯΔਓ ϒϥβ$16·Ͱ ϝʔϥʔॏ͍͔Β੍ݶͯ͠Ζ͏ αʔόͰ-JOVY͍ͬͯΔਓ
͜ͷϓϩάϥϜ*0੍ޚͭͭ҆͠શʹ ͔͔࣌ؒͬͯྑ͍ͷͰ$16͑ؾຯͰ
DHSPVQT ,FSOFM MJCDHSPVQ DHSPVQGT NSVCZDHSPVQ NSVCZFWFOUGE SDPO NSVCZSDPO ϝϞϦίʔϧόοΫ ͷΈϑΝΠϧ*0Λར༻
ϝϞϦίʔϧόοΫ DHSPVQͷϝϞϦΠϕϯτΛݕ ϝϞϦ੍ݶͷ౸ୡ0VUPG.FNPSZ FWFOUGEΛNSVCZFWFOUGEͱ࣮ͯ͠ IUUQTHJUIVCDPNNBUTVNPUPSNSVCZFWFOUGE
NSVCZSDPO 3VCZϒϩοΫΛίʔϧόοΫՄೳ ϝϞϦ੍ݶͷ֦ு NSVCZFWFOUGEʹΑΔݕͱ௨ IUUQTHJUIVCDPNNBUTVNPUPSNSVCZSDPO
None
None
DBQDPO
ҙͷίϚϯυͷಛݖΛݶఆ ҙͷίϚϯυΛҙͷϢʔβͰ DBQBCJMJUZΛ੍ޚ࣮ͭͭ͠ߦ͔ͨͬͨ͠ ͕ɺͰ͖ͳ͔ͬͨʂ
Ͱ͖ͳ͔ͬͨཧ༝ FYFDWF࣌ʹDBQ͕શͯམͪΔ XSBQQFSπʔϧͳͷͰGPSL FYFDWFඞਢ SPPUݖݶͩͱFWFDWFޙҾ͖ܧ͙͕ ͰࠓճҙͷϢʔβͰ࣮ߦ͍ͨ͠
ϑΝΠϧDBQΛઃఆ͢ΔͱҾ͖ܧ͙͕ ҙͷίϚϯυ͕ରͳͷͰϑΝΠϧDBQ࿔Εͳ͍
ิɿDBQͷҾ͖ܧ͗ϧʔϧ 1 QFSNJUUFE 1 JOIFSJUBCMF ' JOIFSJUBCMF c
' QFSNJUUFE DBQ@CTFU 1 F⒎FDUJWF ' F⒎FDUJWF 1 QFSNJUUFE 1 JOIFSJUBCMF 1 JOIFSJUBCMF 1FYFDWF લͷεϨουͷέʔύϏϦςΟηοτͷ 1`FYFDWF ޙͷεϨουͷέʔύϏϦςΟηοτͷ 'ϑΝΠϧέʔύϏϦςΟηοτͷ DBQ@CTFUέʔύϏϦςΟόϯσΟϯάηοτͷ
·ͱΊ
SDPOBOEDBQDPOJOUFSOBMT DHSPVQTͱ-JOVYDBQBCJMJUZͷ׆༻ ίϚϯυϥΠϯ͔Β׆༻͍ͨ͠ SDPOͰ͖͚ͨͲDBQDPOະ DHSPVQTͱDBQBCJMJUZͰϓϩηεΛ ߴʹ੍ޚͰ͖Δ
ࠓޙΓ͍ͨ͜ͱ 7.ΛϓϩηεɺίϯςφΛεϨουͱݟཱͯΔ LFSOFM͕͋Δछͷڞ༗ϝϞϦͷΑ͏ͳͷ ͍͔ʹϓϩηεΛ͘ɾޮྑ͘GPSL ͢Δ͔ ͍͔ʹεϨουΛ͘ɾ҆શʹ࡞Δ͔
͍͔ʹϓϩηεؒͷεέδϡʔϧϦιʔεཧΛ͢Δ͔ ࠓޙ7.ίϯςφͷ࿈ܞ͕ࠓͰ͍͏04ͱͳΔੈք͕དྷΔ ͱࢥ͍ͬͯΔͷͰɺݹయతͳ04ͷػೳΛ͍͔ʹωοτϫʔΫ Λ௨ͨͦ͡Εʹஔ͖͍͔͑ͯ͘ʹઓ