TakumaKume_kixs_vol002 - Speaker Deck

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ٱถ୓അ(.01FQBCP *OD ۝भΠϯϑϥަྲྀษڧձ,*94WPM!(.0ϖύϘ෱Ԭࢧࣾ ϗεςΟϯάʹ͓͚Δॊೈ͔ͭܰྔͳΞΫηε੍ޚͷ ඞཁੑͱͦͷ࣮૷

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ࣗݾ঺հ ٱถ ୓അ (@takumakume) ߴߍଔۀʙ6೥ؒ ΠϯλʔωοταʔϏεϓϩόΠμͰۈ຿ ωοτϫʔΫʙϛυϧ΢ΣΞͷߏங ϓϦηʔϧεΤϯδχΞ 2016೥4݄͔ΒϖύϘʹೖࣾ ϩϦϙοϓʂͷΠϯϑϥΤϯδχΞ

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໨࣍ ϗεςΟϯάʹ͓͚Δॊೈ͔ͭܰྔͳΞΫηε੍ޚͱ͸ mrubyΛ༻͍ͨ࣍ੈ୅ΞΫηε੍ޚͷ࣮૷ ·ͱΊ

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ϗεςΟϯάʹ͓͚Δॊೈ͔ͭܰྔͳΞΫηε੍ޚ ͱ͸

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ॊೈ͔ͭܰྔͳΞΫηε੍ޚ

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ϗεςΟϯάʹ͓͚ΔΞΫηε੍ޚ ϗεςΟϯά͸ͦͷಛੑ্ɺ͓٬༷ͷ༷ʑͳίϯςϯπΛ͓ ༬͔Γ͍ͯ͠Δɻ தʹ͸ҟৗʹߴෛՙʹͳΔ΋ͷ΍ɺDDoSͷର৅ʹͳΔίϯς ϯπͳͲ༷ʑͰ͋Δɻ ͔͠͠ɺ͜ͷΑ͏ͳҰ෦ͷίϯςϯπʹΑΓɺͦͷαʔόΛ ͝ར༻௖͍͍ͯΔେଟ਺ͷଞͷ͓٬༷͕շదʹ8Λར༻Ͱ͖ͳ͘ ͳͬͯ͠·͏͜ͱ͸ɺ͋ͬͯ͸ͳΒͳ͍ͱզʑ͸ߟ͍͑ͯ·͢ɻ

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ຊηογϣϯͰ͸ͦͷղܾखஈͷ̍ͭͱͯ͠ɺ ϩϦϙοϓʂͰߦ͍ͬͯΔ ଟ͘ͷ͓٬༷ʹ8Λշదʹ͝ར༻͍ͨͩͨ͘Ίͷ ࣍ੈ୅ΞΫηε੍ޚʹ͍ͭͯ͝঺հ͠·͢ɻ

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ॊೈ͔ͭܰྔͳΞΫηε੍ޚ

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ݱঢ়ͷΞΫηε੍ޚͷ՝୊

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͜Ε·Ͱʹར༻ͨ͠ΞΫηε੍ޚखஈ mod_cbandΛར༻ͨ͠ΞΧ΢ϯτ୯ҐͰͷτϥϑΟοΫ ੍ޚͱಉ࣌ΞΫηε਺੍ޚ mod_vhost_maxclientsΛར༻ͨ͠υϝΠϯ୯ҐͰͷ ಉ࣌ΞΫηε਺੍ޚ ͦΕͧΕ՝୊͕͋ͬͨ

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NPE@DCBOEΛར༻੍ͨ͠ޚʹΑΔ՝୊ ΞΧ΢ϯτ୯ҐͷτϥϑΟοΫͱಉ࣌ΞΫηε਺੍ݶΛ͍ͯͨ͠ɻ CBandSpeed 10Mb/s 30 30 mod_cbandΛ༗ޮʹ͢Δ͜ͱͰ໿70%ఔ౓ͷύϑΥʔϚϯε ྼԽ͕ੜ͡ɺ੍ޚػߏࣗମ͕ϘτϧωοΫͱͳͬͨɻ

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NPE@WIPTU@NBYDMJFOUTΛར༻੍ͨ͠ޚ mod_cbandͷύϑΥʔϚϯεྼԽ͕େ͖͍ͨΊͪ͜ΒΛ࠾༻ɻ ಋೖʹΑΔύϑΥʔϚϯεྼԽ͸2%ͱߴ଎ͳιϑτ΢ΣΞɻ ҎԼͷΑ͏ʹυϝΠϯ୯Ґͷಉ࣌ΞΫηε਺੍ݶΛߦ͏ɻ DocumentRoot /path/to/web ServerName hoge.example.jp VhostMaxClients 30 ͔͠͠ɺ࣍ͷΑ͏ͳύλʔϯͰ՝୊͕ੜͨ͡ɻ

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NPE@WIPTU@NBYDMJFOUTΛͲ͏࢖͍ͬͯΔ͔ ڞ༻8αʔό IPHFDPN mod_vhost_maxclientsͷ੍ݶ ZDPN YDPN ஶ͘͠Ϧιʔε࢖༻ྔ͕ภΒͳ͍Α͏ʹେ࿮ͷϦιʔε෼ׂͱ ͯ͠ɺ֤υϝΠϯʹಉ࣌઀ଓ਺ͷ੍ݶΛ͔͚͍ͯ·͢ɻ

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ڞ༻8αʔό IPHFDPN ॲཧͷॏ͍ϓϩάϥϜʹΞΫηε͕ूத͠αʔό͕ߴෛՙͱͳͬͨ mod_vhost_maxclientsͷ੍ݶ ZDPN YDPN

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ڞ༻8αʔό IPHFDPN mod_vhost_maxclientsͷ੍ݶ ZDPN YDPN NPE@WIPTU@NBYDMJFOUTͷ੍ݶΛڧΊΔඞཁ͕͋Δ

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ڞ༻8αʔό IPHFDPN ZDPN YDPN ੍ݶΛڧΊͨ ܰྔͳίϯςϯπʹ΋ΞΫηεͰ͖ͳ͘ͳΔ

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ڞ༻8αʔό IPHFDPN ZDPN YDPN ຊདྷ੍ޚ͞ΕΔඞཁ͕ͳ͍ϑΝΠϧ·Ͱ ΞΫηεͰ͖ͳ͘ͳͬͯ͠·͏ɻ

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ղܾํ๏ ڞ༻8αʔό IPHFDPN ZDPN YDPN ϑΝΠϧ୯ҐͰ੍ޚ mod_vhost_maxclients

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ղܾํ๏ ڞ༻8αʔό IPHFDPN ZDPN YDPN ϑΝΠϧ୯ҐͰ੍ޚ mod_vhost_maxclients αʔόͷෛՙΛԼ͛ͭͭɺ੍ޚʹΑΔӨڹΛۃখԽͰ͖Δɻ

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࣌ ࣌ ࣌ ࣌ ࣌ ࣌ ࣌ ࣌ ࣌ ͋ΔαʔόͷϦιʔεফඅྔ <>

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࣌ ࣌ ࣌ ࣌ ࣌ ࣌ ࣌ ࣌ ࣌ શମ ͋ΔαʔόͷϦιʔεফඅྔ <> ಛఆͷϑΝΠϧ ಛఆͷ࣌ؒʹେྔʹΞΫηε͕͋Δ

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࣌ ࣌ ࣌ ࣌ ࣌ ࣌ ࣌ ࣌ ࣌ શମ ͋ΔαʔόͷϦιʔεফඅྔ <> ಛఆͷϑΝΠϧ ಛఆͷϑΝΠϧͷॲཧͰϦιʔεͷ΄ͱΜͲΛফඅ͠ ఆظతʹଞͷ͓٬༷΁ͷαʔϏεఏڙʹࢧোΛ͖͍ͨͯͨ͠ɻ

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࣌ ࣌ ࣌ ࣌ ࣌ ࣌ ࣌ ࣌ ࣌ શମ ಛఆͷϑΝΠϧ ղܾํ๏ <> ෛՙͷߴ͍ϑΝΠϧʹରͯ͠ ࣌ؒࢦఆͰ੍ޚ͢Δ

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ॊೈͳΞΫηε੍ޚͷ·ͱΊ ݱঢ়ΑΓ΋ࡉ͔͍ɺϑΝΠϧ୯ҐͰΞΫηε੍ޚͰ͖ΔΑ͏ ʹͯ͠ɺ੍ޚʹΑΔӨڹΛۃখԽ͢Δ͜ͱɻ ಛఆͷ࣌ؒͷΈΞΫηε੍ޚΛ༗ޮԽͰ͖Δ͜ͱɻ

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ॊೈ͔ͭܰྔͳΞΫηε੍ޚ

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ϗεςΟϯάͰ͸1୆ͷαʔόΛଟ͘ͷ͓٬༷ʹ͝ར༻͍ͨͩ͘͜ ͱͰ҆Ձʹఏڙ͍ͯ͠Δɻ ࠓޙ΋Ͱ͖Δ͚ͩ҆ՁʹշదͳαʔϏεΛఏڙ͍ͨ͠ɻ ΞΫηε੍ޚͷػߏ͕ϘτϧωοΫʹͳͬͯ͸ɺͦΕΛୡ੒Ͱ͖ ͳ͘ͳΔɻ ܰྔͳΞΫηε੍ޚͷඞཁੑ

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ॊೈ͔ͭܰྔͳΞΫηε੍ޚ ͱ͸

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ϑΝΠϧ୯ҐͰΞΫηε੍ޚͰ͖Δ͜ͱɻ ಛఆͷ࣌ؒଳͷΈΞΫηε੍ޚΛ༗ޮԽͰ͖Δ͜ͱɻ ύϑΥʔϚϯεྼԽΛۃྗى͜͞ͳ͍͜ͱɻ ॊೈ͔ͭܰྔͳΞΫηε੍ޚͱ͸ ͲͷΑ͏ʹ࣮ݱ͢Δ͔ʁ

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ϑΝΠϧ୯ҐͷΞΫηε੍ޚ͸ طʹ"QBDIFͷϞδϡʔϧ͕ଘࡏ͢Δɻ

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NPE@WMJNJU mod_vlimit https://github.com/matsumoto-r/mod_vlimit ϑΝΠϧ΍σΟϨΫτϦ୯ҐͰಉ࣌ΞΫηε੍ޚΛ͢Δ͜ͱ͕Ͱ͖Δɻ VlimitIP 30 /path/to/hoge.php ϑΝΠϧ୯ҐͰͷΞΫηε੍ޚΛߦ͏ػೳ͸͋Δ͕ ࠓճ͸ಋೖʹ͸ࢸΒͳ͔ͬͨɻ

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NPE@WMJNJUΛ࠾༻͠ͳ͔ͬͨཧ༝ ࣌ؒࢦఆͰ੍ݶΛ༗ޮԽͰ͖Δػೳ͕ͳ͍ɻ ApacheͷϞδϡʔϧͳͷͰCݴޠͰ࣮૷͞Ε͍ͯΔɻ ӡ༻ܥͷπʔϧ͸࣌ؒͷܦաʹରͯ͠ॊೈͳมߋ͕ཁ ٻ͞ΕΔɻ CݴޠͰͷ։ൃͱͳΔͱ։ൃ޻਺্͕͕Δɺ։ൃऀ͕ݶ ΒΕΔɻ

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Ͱ͸ɺͲͷΑ͏ʹ࣮ݱ͢Δ͔ʁ

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“mruby” ͳΒղܾͰ͖Δɻ

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NSVCZ Rubyͷύύ͜ͱ “Matz” ͞Μ͕։ൃ͍ͯ͠Δɻ লϝϞϦͷ૊ΈࠐΈ޲͚ͷRuby࣮૷ɻ Cݴޠ͕ۤखͳͻͱͰ΋ɺmrubyΛ࢖͑͹RubyͰ૊ΈࠐΈ ։ൃΛߦ͏ࣄ͕Ͱ͖Δɻ

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Apache΍NginxͰmrubyΛ༻͍ͨ૊ΈࠐΈ ։ൃΛ࣮ݱͨ͠ιϑτ΢ΣΞ͕ଘࡏ͢Δ

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NPE@NSVCZOHY@NSVCZ ฐࣾͷ@matsumotory͕։ൃ͍ͯ͠Δɻ mod_mruby ApacheͰmrubyΛར༻͢ΔͨΊͷϞδϡʔϧ ngx_mruby nginxͰmrubyΛར༻͢ΔͨΊͷ֦ு࣮૷ CݴޠͰϞδϡʔϧΛ࣮૷͠ͳ͚Ε͹࣮ݱͰ͖ͳ͔ͬͨڍಈΛmruby Λ࢖͙ͬͯ͢ʹ࣮૷Ͱ͖ͯɺ࠷খݶͷύϑΥʔϚϯεྼԽʹཹΊΔ͜ ͱ͕Ͱ͖Διϑτ΢ΣΞɻ

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IUUQTHJUIVCDPNNBUTVNPUPSNPE@NSVCZ mod_mruby -1.5% ngx_mruby +17.5% ੩తίϯςϯπʹର͢ΔύϑΥʔϚϯεܭଌ݁Ռ

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mrubyΛ༻͍Ε͹֦ுੑɺอकੑΛଛͳΘͣ ࠷খݶͷύϑΥʔϚϯεྼԽʹཹΊͯ ιϑτ΢ΣΞΛ։ൃ͢Δ͜ͱ͕Ͱ͖Δɻ

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NSVCZΛ༻͍ͨ࣍ੈ୅ΞΫηε੍ޚͷ࣮૷

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࣮૷ʹ͋ͨͬͯར༻ͨ͠ιϑτ΢ΣΞ

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IUUQBDDFTTMJNJUFS ฐࣾͷ @matsumotory ͕։ൃ͍ͯ͠Δɻ https://github.com/matsumoto-r/http-access-limiter mod_mruby΋͘͠͸ngx_mrubyͰऔಘͨ͠೚ҙͷϦΫΤετύϥ ϝʔλΛ༻͍ͯಉ࣌઀ଓ਺ΛΧ΢ϯτ͢Δmruby੡ϛυϧ΢ΣΞ औಘͰ͖ΔϦΫΤετύϥϝʔλʹ͸ΞΫηεઌͷϑΝΠϧͷϑϧ ύεΛ࢝Ίɺ઀ଓݩͷIPΞυϨε΍ɺURLͳͲΛऔಘͰ͖ΔͨΊ ༷ʑͳ༻్Ͱ࢖༻Ͱ͖Δɻ

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ಈ࡞֓ཁ ਌ NSVCZ 8PSLFS NSVCZ 8PSLFS NSVCZ IUUQE ڞ༗ϝϞϦ global mutex ಉ࣌઀ଓ਺ Χ΢ϯλʔ KVS ಉ࣌઀ଓ਺Χ΢ϯλʔ localmemcacheΛ༻͍ͨ Key-Value-Store Ωʔͱͨ͠ϦΫΤετύϥϝʔ λΛݩʹಉ࣌ΞΫηε਺ΛΧ ΢ϯτ͢Δɻ global mutex ֤Worker͔Βಉ࣌઀ଓ਺Χ ΢ϯλʔΛૢ࡞͢ΔͨΊෆ੔ ߹͕ൃੜ͠ͳ͍Α͏ʹ౎౓ϩο ΫΛߦ͏ɻ KEY /path/to/hoge.php VALUE 1

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ಈ࡞֓ཁ ਌ NSVCZ 8PSLFS NSVCZ 8PSLFS NSVCZ IUUQE ڞ༗ϝϞϦ global mutex ಉ࣌઀ଓ਺ Χ΢ϯλʔ KVS ϦΫΤετ ϦΫΤετ NVUFYΛϩοΫ MPDL ϦΫΤετύϥϝʔλΛΩʔ ʹΠϯΫϦϝϯτ ΠϯΫϦϝϯτ KEY /path/to/hoge.php VALUE 1 VOMPDL NVUFYΛΞϯϩοΫ

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ಈ࡞֓ཁ ਌ NSVCZ 8PSLFS NSVCZ 8PSLFS NSVCZ IUUQE ڞ༗ϝϞϦ global mutex ಉ࣌઀ଓ਺ Χ΢ϯλʔ KVS ίϯςϯπͷॲཧΛߦ͏ NVUFYΛϩοΫ MPDL σΫϦϝϯτ σΫϦϝϯτ VOMPDL NVUFYΛΞϯϩοΫ KEY /path/to/hoge.php VALUE 0 ίϯςϯπͷॲཧ

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ಈ࡞֓ཁͷ·ͱΊ ϦΫΤετ͕͋ͬͨ࣌ʹɺϦΫΤετύϥϝʔλΛmod_mruby΍ ngx_mrubyΛ༻͍ͯऔಘ͢Δɻ ΞΫηε੍ޚΛ͍ͨ͠୯ҐΛΩʔͱͯ͠ɺಉ࣌઀ଓ਺ΛΧ΢ϯτ͢Δɻ ෳ਺ͷWorker͔ΒΧ΢ϯλʔૢ࡞͢ΔͨΊɺglobal mutexΛ࢖ͬͯ ෆ੔߹͕ى͖ͳ͍Α͏ʹ੍ޚ͢Δɻ

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ػೳ௥ՃΛ͢Δ http-access-limiterʹϑΝΠϧຖͷ࠷େಉ࣌઀ଓ਺ͷઃఆ ػೳ΍ɺ੍ޚΛ༗ޮԽ͢Δ࣌ؒଳΛઃఆ͢ΔػೳΛ௥Ճͨ͠ ͍ɻ mrubyͰॻ͔Ε͍ͯΔͨΊ؆୯ʹػೳ௥Ճ͕Ͱ͖Δʂ

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ػೳ௥ՃΠϝʔδ ਌ NSVCZ 8PSLFS NSVCZ 8PSLFS NSVCZ IUUQE ڞ༗ϝϞϦ global mutex ಉ࣌઀ଓ਺ Χ΢ϯλʔ KVS ੍ޚ৚݅ localmemcacheΛ༻͍ͨ Key-Value-Store ϑΝΠϧͷϑϧύε͕Ωʔ ࠷େಉ࣌઀ଓ਺ ੍ݶΛ༗ޮԽ͢Δ࣌ؒଳ KVS ੍ޚ৚݅

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੍ݶ৚݅ͷσʔλ /path/to/hoge.php { "max_clients" : 30, # ࠷େಉ࣌઀ଓ਺ "time_slots" : [ # ༗ޮʹ͢Δ࣌ؒଳ { "begin" : 1200, "end" : 1800 }, { "begin" : 2100, "end" : 2200 } ] } KEY VALUE A Aͷؒ͸AQBUIUPIPHFQIQA΁ͷ ࠷େ઀ଓ਺ΛAA·Ͱʹ੍ݶ͢Δɻ

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ػೳ௥Ճޙͷಈ࡞֓ཁ ਌ NSVCZ 8PSLFS NSVCZ 8PSLFS NSVCZ IUUQE ڞ༗ϝϞϦ global mutex ಉ࣌઀ଓ਺ Χ΢ϯλʔ KVS KVS ੍ޚ৚݅ ϦΫΤετ ϦΫΤετ ੍ޚ৚݅ Λࢀর ੍ޚ৚݅Λࢀর ɹɹଘࡏ͠ͳ͚Ε͹ॲཧऴྃ NVUFYΛϩοΫ MPDL ϑΝΠϧͷϑϧύεΛΩʔʹ ΠϯΫϦϝϯτ ΠϯΫϦϝϯτ ΋੍͠ݶ͕༗ޮͳ࣌ؒଳͰಉ ࣌઀ଓ਺੍ݶΛ௒ա͍ͯ͠Ε͹ ΤϥʔΛฦ͢

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࢖͍ํ IUUQEDPOG LoadModule mruby_module modules/mod_mruby.so # Apacheͷϓϩηε͕ىಈͨ࣌͠ʹϑοΫ͞ΕΔ # http-access-limiterͷΫϥεΛఆٛɺ࣍ʹىಈ͢ΔWorker͕ࢀরͰ͖ΔΑ͏ʹ͢Δɻ mrubyPostConfigMiddle /etc/httpd/conf.d/access_limiter/access_limiter_init.rb cache # ΞΫηε͕ൃੜͨ͠ͱ͖ʹϑοΫ͞ΕΔ # ಉ࣌઀ଓ਺Χ΢ϯλΛΠϯΫϦϝϯτ͢Δ # ͞Βʹɺ࠷େಉ࣌઀ଓ਺Λ௒աͨ͠৔߹ʹ503ΤϥʔΛฦ͢ͳͲͷΞΫγϣϯΛهड़͢Δɻ mrubyAccessCheckerMiddle /etc/httpd/conf.d/access_limiter/access_limiter.rb cache # ίϯςϯπͷॲཧ͕ऴΘͬͨͱ͖ʹϑοΫ͞ΕΔ # ಉ࣌઀ଓ਺Χ΢ϯλΛσΫϦϝϯτ͢Δ mrubyLogTransactionMiddle /etc/httpd/conf.d/access_limiter/access_limiter_end.rb cache

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ؾʹͳΔύϑΥʔϚϯε

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ಋೖʹΑΔύϑΥʔϚϯεྼԽ ໿3ˋ

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ύϑΥʔϚϯεςετ݁Ռ abΛ࢖ͬͯύϑΥʔϚϯεΛଌఆ͠·ͨ͠ɻ ςετύλʔϯ ྼԽ཰ httpd 0% httpd + http-access-limiter 3% httpd + http-access-limiter (੍ݶର৅) 5% WordPress΁ͷΞΫηε 10ສϦΫΤετ100ଟॏ / CPU24ίΞɾRAM32GB ςετύλʔϯ ྼԽ཰ httpd 0% httpd + http-access-limiter 3% httpd + http-access-limiter (੍ݶର৅) 30% phpinfo()΁ͷΞΫηε ࢀߟࢿྉ

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ύϑΥʔϚϯεςετ݁Ռʹର͢Δߟ࡯ access-limiterͷಋೖʹੜ͡ΔύϑΥʔϚϯεྼԽ͸3%ͱߴ ଎Ͱ͋Δ͜ͱ͕෼͔ͬͨɻ DBΛ࢖͏WordPressͰ͸ɺΞϓϦέʔγϣϯͷॲཧ͕Φʔό ϔουͱͳͬͯaccess-limiterΛಋೖ͢Δ͜ͱʹΑΔΦʔό ϔου͸ޡࠩఔ౓ͱͳͬͨɻ phpinfo()ͷΑ͏ͳܰྔͳॲཧͷ৔߹ʹɺ੍ݶର৅ͱͨ͠ͱ͖ ʹ3ׂఔ౓ύϑΥʔϚϯεྼԽ͕ੜͨ͡ɻ ࢀߟࢿྉ

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·ͱΊ ϗεςΟϯά͸ڞ༗αʔόͰ͋ΔͷͰɺΑΓଟ͘ͷਓ͕҆Ձ Ͱշదʹ͝ར༻͍ͨͩͨ͘ΊʹΞΫηε੍ޚ͸ඞཁɻ ΞΫηε੍ޚͷ୯ҐΛΑΓࡉ੍͔ͯ͘͠ޚʹΑΔӨڹΛۃখ Խ͠ɺద੾ͳΞΫηε੍ޚΛ࣮ݱͨ͠ɻ ࣮ݱखஈͱͯ͠อकੑɺ֦ுੑɺੑೳͷόϥϯε͕Α͍ mrubyΛ༻͍ͨɻ