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運用技術者組織の設計と運用 / Design and operation of operati...

運用技術者組織の設計と運用 / Design and operation of operational engineer organization

第12回 インターネットと運用技術シンポジウム(IOTS 2019)~運用管理する人”も”報われるシステムの構築を考える~ にて招待講演を行った際の資料です。

概要: https://www.iot.ipsj.or.jp/symposium/iots2019/
プログラム: https://www.iot.ipsj.or.jp/symposium/iots2019-program/

Narimichi Takamura

December 05, 2019
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  1. about:me • גࣜձࣾϋʔτϏʔπ • ιʔγϟϧήʔϜɺeϥʔχϯάɺECɺಈը഑৴ͳͲ༷ʑͳӡ༻Λܦݧ • ΤϯδχΞϦϯά૊৫ͷ੹೚ऀͱͯ͠ϚωδϝϯτΛܦݧ • ిؾ௨৴େֶ ৘ใཧ޻ֶ෦ֶ࢜

    ֶ࢜ • ଔݚͰ͸ Linux ΧʔωϧʹखΛՃ͑ɺI/O εέδϡʔϥͷվળఏҊΛߦ͏ • άϩʔϏεܦӦେֶӃ ܦӦݚڀՊܦӦઐ߈ म࢜ • ܦӦ΍ϚωδϝϯτͷΠϩϋΛֶͿ ୈ12ճ Πϯλʔωοτͱӡ༻ٕज़γϯϙδ΢Ϝ (2019/12/05) | Takamura Narimichi (@nari_ex) 4
  2. ؀ڥͷมԽʹΑͬͯු͖ூΓʹͳͬͨ՝୊ • 1. ։ൃ૊৫ͱӡ༻૊৫ͷαΠϩԽ • 2. ϦϦʔεαΠΫϧͷݶք • ཁٻ࢓༷ͷมߋʹ௥ैͮ͠Β͍ैདྷͷ։ൃٕ๏ •

    ϞϊϦεΞʔΩςΫνϟʹΑΔେن໛։ൃͷݶք • 3. ӡ༻૊৫ͷංେԽ ୈ12ճ Πϯλʔωοτͱӡ༻ٕज़γϯϙδ΢Ϝ (2019/12/05) | Takamura Narimichi (@nari_ex) 8
  3. ૊৫ؒͷڥքͷมԽ: DevOps1 2 ։ൃ୲౰ऀͱӡ༻୲౰ऀ͕࿈ܞͯ͠ڠྗ͢Δʢ͞Βʹ྆୲౰ऀͷڥ໨΋͍͋·͍ʹ͢Δʣ։ൃख๏ 2 Kharnagy, Devops-toolchain, 2016 1 John

    Allspaw, 10+ Deploys per Day: Dev and Ops Cooperation at Flickr, 2009 ୈ12ճ Πϯλʔωοτͱӡ༻ٕज़γϯϙδ΢Ϝ (2019/12/05) | Takamura Narimichi (@nari_ex) 10
  4. ϚΠΫϩαʔϏεͷొ৔ • ૊৫ύϑΥʔϚϯεͷ࠷େԽ͕໨త • େن໛Խͯ͠΋খ͞ͳಠཱͨ͠૊৫ʹΑͬͯܧଓతͳϦϦʔεΛߦ͏͜ͱ ͕Ͱ͖Δ • ͦͷଞ • ো֐఺ͷہॴԽ

    • ։ൃɾӡ༻είʔϓͷݶఆ • εέʔϥϏϦςΟͷ࠷దԽ ୈ12ճ Πϯλʔωοτͱӡ༻ٕज़γϯϙδ΢Ϝ (2019/12/05) | Takamura Narimichi (@nari_ex) 16
  5. enabling continuous delivery/deployment 4 4 The microservice architecture is a

    means to an end: enabling continuous delivery/deployment, 2017 ୈ12ճ Πϯλʔωοτͱӡ༻ٕज़γϯϙδ΢Ϝ (2019/12/05) | Takamura Narimichi (@nari_ex) 17
  6. Continuous Delivery 5 5 Melanie Cebula, Developing Kubernetes Services at

    Airbnb Scale, 2018 ୈ12ճ Πϯλʔωοτͱӡ༻ٕज़γϯϙδ΢Ϝ (2019/12/05) | Takamura Narimichi (@nari_ex) 18
  7. ิ଍: SOA ͷ࣮૷ʹΑΔ૊৫αΠϩͷղফ • SOA = αʔϏεࢦ޲ΞʔΩςΫνϟ • ϚΠΫϩαʔϏε΋͜ͷΞʔΩςΫνϟͷҰͭ •

    ϞϊϦεΞʔΩςΫνϟͰ͸ɺ໾ׂ෼୲ʹΑ֤ͬͯ૊৫ͷ໨త ͸ͦͷ໾ׂʢ։ൃɺӡ༻ͳͲʣͩͬͨ • SOA ʹมߋ͢Δ͜ͱͰɺνʔϜ಺ͷ໨త͕౷Ұ͞ΕαΠϩԽ ͕ղফ ୈ12ճ Πϯλʔωοτͱӡ༻ٕज़γϯϙδ΢Ϝ (2019/12/05) | Takamura Narimichi (@nari_ex) 19
  8. ิ଍: ίϯ΢ΣΠͷ๏ଇͷԠ༻: ٯίϯ΢ΣΠઓུ • ίϯ΢ΣΠͷ๏ଇʢConway’s Lawʣ • ʮγεςϜΛઃܭ͢Δ૊৫͸ɺͦͷߏ଄Λͦͬ͘Γ·Ͷͨߏ ଄ͷઃܭΛੜΈग़ͯ͠͠·͏ʯ •

    ٯίϯ΢ΣΠઓུʢInverse Conway Maneuverʣ • ʮιϑτ΢ΣΞͷߏ଄͕૊৫ͷߏ଄ʹ൓ө͢Δʯ => ૊৫ߏ଄ΛΞʔΩςΫνϟ΁ੵۃతʹدͤΔͱ͍͏఺͕ॏཁ ୈ12ճ Πϯλʔωοτͱӡ༻ٕज़γϯϙδ΢Ϝ (2019/12/05) | Takamura Narimichi (@nari_ex) 20
  9. SRE ͷ஀ੜ • DevOps ͱ͸ผͷจ຺Ͱ 2000೥୅ʹ Google ͷࣾ಺χʔζΛຬ ͨͨ͢Ίʹੜ·Εͨ •

    ೔ຊͰ͸2015೥લޙ͔Βঃʑʹ޿·Γ͸͡Ίͨ ୈ12ճ Πϯλʔωοτͱӡ༻ٕज़γϯϙδ΢Ϝ (2019/12/05) | Takamura Narimichi (@nari_ex) 23
  10. SRE ͱ͸ • 2ͭͷݴ༿ͷུޠ • Site Reliability EngineeringʢSREʣ • ద੾ͳαΠτ৴པੑΛ࣮ݱ͢ΔͨΊͷٕज़ख๏ɾٕज़ྖҬ

    • ఻౷తͳ ops ͱ͸ҰઢΛը͢ • Site Reliability EngineerʢSREsʣ • ্هख๏Λ࣮ݱ͢Δ৬छ ୈ12ճ Πϯλʔωοτͱӡ༻ٕज़γϯϙδ΢Ϝ (2019/12/05) | Takamura Narimichi (@nari_ex) 24
  11. SRE ͕ੜ·Εͨഎܠ • Motivation • େن໛ͷෳࡶͳίϯϐϡʔλγεςϜΛӡ༻͢Δͱ͖ɺγεςϜͷ੒௕ɾ֦େʹൺྫͯ͠ӡ༻ܥΤϯδχΞ ͷਓ਺͕૿͑Δঢ়ଶΛղফ͍ͨ͠ • ։ൃνʔϜʢDevʣͱӡ༻νʔϜʢOpsʣͷରཱΛղܾ͍ͨ͠ •

    Basic Concepts • γεςϜɾମ੍Λιϑτ΢ΣΞΤϯδχΞϦϯάͱͯ͋͠Δ΂͖࢟ʹ͢Δ • ૊৫ߏ଄తͳରཱΛͳ͘͢ • Core Practices • ιϑτ΢ΣΞΤϯδχΞʹΑΔ఻౷త ops ͷ࠶ఆٛɾஔ׵ • ্هͷཤߦɾਪਐɾҡ࣋ʹ͓͍ͯձ͕ࣾ SRE Λࢧ࣋ɾࢧԉ͢Δ ୈ12ճ Πϯλʔωοτͱӡ༻ٕज़γϯϙδ΢Ϝ (2019/12/05) | Takamura Narimichi (@nari_ex) 26
  12. class SRE implements DevOps6 • DevOps ͱ͸ؔ܎ͳ͘ SRE ͸ੜ·Ε͕ͨɺ݁Ռతʹ DevOps

    ͷ఩ֶΛ ମݱ͍ͯͨ͠ͱ͍͏ྲྀΕ • SRE ͷϓϥΫςΟε͸ DevOps ͷൣғ֎ͷ΋ͷ΋ؚΜͰ͍Δ͕ɺൣғ ಺ͷ΋ͷʹ͍ͭͯ͸۩ମతͳख๏͕ఏҊ͞Ε͍ͯΔͱ͍͏࿩ • ͜ͷؔ܎ੑΛҰݴͰද͢ͱ class SRE implements DevOps • DevOps ͱ SRE ͸ڝ߹͢Δख๏Ͱ͸ͳ͘਌͍͠༑ͩͪ 6 SRE vs. DevOps: competing standards or close friends? ୈ12ճ Πϯλʔωοτͱӡ༻ٕज़γϯϙδ΢Ϝ (2019/12/05) | Takamura Narimichi (@nari_ex) 28
  13. ิ଍: DevOps ͱ SRE ͷؔ܎ੑ6 ͨͱ͑͹ DevOps ͷ 5 ͭͷப͸

    SRE ͷϓϥΫςΟεͱରԠͤ͞Δ͜ͱ͕Ͱ͖Δ DevOps SRE Reduce Organization Silos Share ownership Accept Failure as Normal SLOs & Blameless PMs Implement Gradual Change Reduce costs of failure Leverage Tooling & Automation Automate this year's job away Measure Everything Measure toil and reliablity 6 SRE vs. DevOps: competing standards or close friends? ୈ12ճ Πϯλʔωοτͱӡ༻ٕज़γϯϙδ΢Ϝ (2019/12/05) | Takamura Narimichi (@nari_ex) 29
  14. ҙ༁ DevOps SRE ૊৫ͷαΠϩΛݮΒ͢ ૊৫ؒͰΦʔφʔγοϓΛڞ༗͢Δ ΤϥʔͷൃੜΛલఏͱ͢Δ SLO Λఆٛ͠ɺඇ೉Λ൐Θͳ͍ϙετϞ ʔςϜΛߦ͏ ஈ֊తʹมߋ͢Δ

    ࣦഊ࣌ͷίετΛݮΒ͢ πʔϧͱࣗಈԽΛ׆༻͢Δ ໨ͷલͷ࢓ࣄͷࣗಈԽΛߦ͏ શͯΛܭଌ͢Δ τΠϧͱ৴པੑͷܭଌΛߦ͏ ୈ12ճ Πϯλʔωοτͱӡ༻ٕज़γϯϙδ΢Ϝ (2019/12/05) | Takamura Narimichi (@nari_ex) 30
  15. ৘ใγεςϜΛऔΓר͘؀ڥͷٸ଎ͳมԽ΁ͷରԠ • ैདྷख๏ɾΞʔΩςΫνϟʹΑΔ૊৫ͷαΠϩԽ • => ૊৫ؒͷڥքͷมԽʢڥքΛᐆດԽɺ૊৫໨తͷڞ௨Խʣ • ϦϦʔεαΠΫϧͷݶք • =>

    ܧଓతσϦόϦΛ࣮ݱ͢Δ։ൃٕ๏ɾΞʔΩςΫνϟΛಋೖ • ӡ༻૊৫ͷංେԽ • => Site Reliability Engineering ʹΑͬͯ఻౷తͳӡ༻Λ࠶ఆٛ ୈ12ճ Πϯλʔωοτͱӡ༻ٕज़γϯϙδ΢Ϝ (2019/12/05) | Takamura Narimichi (@nari_ex) 31
  16. Microservices Architecture ΍ DevOps ͱ͍ͬͨύϥμΠϜͰॳظ͔ Βಈ͍͍ͯΔए͍૊৫΋͋Γ·͕͢ɺैདྷͷ Monolithic Architecture ΍ Server

    Client Model ͰͷچདྷͷγεςϜΞʔΩςΫ νϟʹແཧ͕ग़͖ͯͯ΋ɺ࠶ߏஙΛ͢Δʹ͸૊৫Λࢧ͑Δج൫Խ ͞Εͯ͠·͕ͬͨނͷ੍໿ʹۤ͠Ή૊৫΋͋Γ·͢ɻ 7 7 ୈ12ճΠϯλʔωοτͱӡ༻ٕज़γϯϙδ΢Ϝ ։࠵झࢫ ୈ12ճ Πϯλʔωοτͱӡ༻ٕज़γϯϙδ΢Ϝ (2019/12/05) | Takamura Narimichi (@nari_ex) 34
  17. ϚΠΫϩαʔϏεͷ೉఺ • ෼ࢄͨ͠σʔλͷҰ؏ੑ୲อͷ໰୊ • ෼ࢄͨ͠αʔϏε΍ॲཧͷՄ؍ଌੑͷ໰୊ • αʔϏε෼ׂڥքͷ໰୊ • ... =>

    ϝϦοτɾσϝϦοτΛצҊͨ݁͠Ռɺ͋͑ͯϚΠΫϩαʔϏ εΛ࠾༻͠ͳ͍ͱ͍͏બ୒ࢶ͸े෼͋Γ͏Δ ୈ12ճ Πϯλʔωοτͱӡ༻ٕज़γϯϙδ΢Ϝ (2019/12/05) | Takamura Narimichi (@nari_ex) 35
  18. HRMΛߏ੒͢Δ3ͭͷཁૉ • HRઓུ • ٻΊΔਓࡐ૾΍૊৫ͷن໛ͳͲΛߟ͑Δ • ૊৫ߏ଄ • ෦໳ɺࢦش໋ྩܥ౷ɺ৬੹ɺݖݶͳͲΛܾΊΔ •

    HRMγεςϜʢࠓճ͸৮Ε·ͤΜʣ • ࠾༻ʙୀ৬·Ͱͷ੍౓Λઃܭɾӡ༻͢Δ ୈ12ճ Πϯλʔωοτͱӡ༻ٕज़γϯϙδ΢Ϝ (2019/12/05) | Takamura Narimichi (@nari_ex) 38
  19. ͜Ε·ͰͷύϥμΠϜ͔Βͷ஌ݟΛநग़͢Δ • ։ൃٕ๏ͷมભ͔Βͷֶͼ • ࡉ͔͍αΠΫϧΛܧଓతʹߦ͏࢓૊Έ͕ඞཁ • νʔϜͱ͍͏୯ҐͰͷ׆ಈ͕ϕετϓϥΫςΟε • ϞϊϦε͔ΒϚΠΫϩαʔϏε΁ͷมભ͔Βͷֶͼ •

    ੹೚ൣғͷڞ௨Խɺ࠷దԽ ʹΑͬͯαΠϩԽΛ๷͙ • ڥքΛࡉ෼Խ͢Δ ͜ͱͰεέʔϥϏϦςΟΛอͭ • ιϑτ΢ΣΞͷڥքͱ૊৫ͷڥքΛҙࣝతʹἧ͑Δ ͜ͱͰύϑΥʔϚϯε͸޲্͢Δ ୈ12ճ Πϯλʔωοτͱӡ༻ٕज़γϯϙδ΢Ϝ (2019/12/05) | Takamura Narimichi (@nari_ex) 44
  20. ૊৫ͷαΠζ • νʔϜͱ͍͏୯ҐΛ࠾༻ • αΠζ͸ɺ7ʙ9ਓνʔϜͷू߹ମͱͯ͠ߏ੒͢Δ • μϯόʔ਺9Λϕʔεͱͨ͠ߟ͑ํ 9 Dunbar's number,

    Dunbar, R. I. M. (1992) ୈ12ճ Πϯλʔωοτͱӡ༻ٕज़γϯϙδ΢Ϝ (2019/12/05) | Takamura Narimichi (@nari_ex) 47
  21. ڥքͷछྨ Ұൠతͳ૊৫ਤͷఆٛҎ֎ʹ΋׆ಈൣғ͝ͱʹఆٛ͞ΕΔ2ͭͷڥք͕͋Δ10 ૊৫ͷू߹ମͷύϑΥʔϚϯε͸ୈೋɺୈࡾͷڥքΛ͍͔ʹίϯτϩʔϧ͢Δ͔͕ ॏཁͱͳΔ11 1. ୈҰڥք: ݫີͳʮ૊৫ʯ֓೦ʹ΋ͱͮ͘ڥք 2. ୈೋڥք: υϝΠϯͱͯ͠ͷڥք

    3. ୈࡾڥք: ҙࣝతௐ੔ͷٴͿൣғͱͯ͠ͷڥք 11 Niels Pflaeging, Organize for Complexity, 2014 10 ܂ాߞଠ࿠ɾాඌխ෉, "૊৫࿦", 2010 ୈ12ճ Πϯλʔωοτͱӡ༻ٕज़γϯϙδ΢Ϝ (2019/12/05) | Takamura Narimichi (@nari_ex) 49
  22. Team Topologies12 • Organizing business and technology team for fast

    flow. • 2019/09/17 ʹग़൛͞Εͨຊ 12 Team Topology, Matthew SkeltonɾManuel Pais, 2019 ୈ12ճ Πϯλʔωοτͱӡ༻ٕज़γϯϙδ΢Ϝ (2019/12/05) | Takamura Narimichi (@nari_ex) 51
  23. 4ͭͷνʔϜλΠϓ Stream-Aligned Team ͸૊৫ͷओཁͳνʔϜλΠϓͰ͋ΓɺଞͷνʔϜ͸ɺStream-Aligned Team ͷෛ୲Λܰݮ͢Δ • Stream-AlignedʢSAʣ Team •

    ୯Ұͷ੡඼·ͨ͸αʔϏεɺ୯Ұͷػೳηοτɺ·ͨ͸୯ҰͷϢʔβʔϖϧιφͷ࡞ۀϑϩʔΛ୲౰͢Δ • Enabling Team • ಛఆͷٕज़·ͨ͸੡඼؅ཧ෼໺ͰɺStream-Aligned Team ʹෆ଍͍ͯ͠ΔػೳΛ֫ಘͰ͖ΔΑ͏ʹࢧԉ͢Δ • ex. Infrastructure-as-Code enablement team • Complicated-Subsystem Team • ෳࡶͳαϒγεςϜΛར༻͢Δ Stream-Aligned Team ͷࢧԉΛ୲౰͢Δ • ex. ϏσΦॲཧίʔσοΫɺ਺ֶϞσϧɺϦΞϧλΠϜऔҾௐ੔ΞϧΰϦζϜɺۚ༥αʔϏεͷτϥϯβΫγϣϯใࠂγεςϜ... • Platform Team • ηϧϑαʔϏεAPIɺπʔϧɺαʔϏεɺ஌ࣝɺαϙʔτͷج൫Λ୲౰͢Δ ୈ12ճ Πϯλʔωοτͱӡ༻ٕज़γϯϙδ΢Ϝ (2019/12/05) | Takamura Narimichi (@nari_ex) 53
  24. Stream-Aligned Team ʹඞཁͳػೳηοτ • Application security • Commercial and operational

    viability analysis • Design and architecture • Development and coding • Infrastructure and operability • Metrics and monitoring • Product management and ownership • Testing and quality assurance • User experience (UX) ୈ12ճ Πϯλʔωοτͱӡ༻ٕज़γϯϙδ΢Ϝ (2019/12/05) | Takamura Narimichi (@nari_ex) 54
  25. 3ͭͷ૬ޓ࡞༻ͷλΠϓ • Collaboration • ผͷνʔϜͱۓີʹ࿈ܞ͢Δ • X-as-a-Service • ࠷খݶͷίϥϘϨʔγϣϯͰԿ͔Λফඅ·ͨ͸ఏڙ͢Δ •

    Facilitating • ଞͷνʔϜΛࢧԉʢ·ͨ͸ࢧԉʣͯ͠ো֐Λղফ͢Δ ୈ12ճ Πϯλʔωοτͱӡ༻ٕज़γϯϙδ΢Ϝ (2019/12/05) | Takamura Narimichi (@nari_ex) 55
  26. ࣮૷ྫ 12 12 Team Topology, Matthew SkeltonɾManuel Pais, 2019 ୈ12ճ

    Πϯλʔωοτͱӡ༻ٕज़γϯϙδ΢Ϝ (2019/12/05) | Takamura Narimichi (@nari_ex) 58
  27. Microservices + SRE: ڥքͱ૬ ޓ࡞༻ • ֤ϚΠΫϩαʔϏεͷڥքΛ Stream-Aligned Team ͷڥքͱͯ͠ѻ͏

    • খن໛ͳαʔϏεͷӡ༻੹೚͸֤αʔϏενʔ Ϝɺେن໛ͳαʔϏεͷӡ༻͸SREνʔϜͱ͢Δ • SRE νʔϜ͸1ͭҎ্ͷϚΠΫϩαʔϏενʔϜ ͱڧ͍ؔ܎Λ࣋ͭ • SRE νʔϜͰͷࢧԉ͕ෆཁͳ৔߹͸ɺϚΠΫ ϩαʔϏενʔϜ͕ SREs Λॴ༗͢Δ͜ͱ͕ ͋Δ ୈ12ճ Πϯλʔωοτͱӡ༻ٕज़γϯϙδ΢Ϝ (2019/12/05) | Takamura Narimichi (@nari_ex) 60
  28. ӡ༻૊৫ͷӡ༻ • ӡ༻ʹऴΘΓ͸ͳ͍ • ৽ٕज़ɺ৽ύϥμΠϜͳͲɺ؀ڥͷมԽʹ௥ै͢ΔͨΊͷ࢓૊Έ͕ඞ ཁʹͳΔ • ex. ૬ޓ࡞༻ͷλΠϓมߋɺνʔϜͷ࠶ฤɺੵۃతͳ Enabling

    νʔ Ϝͷߏங • X-as-a-Service ԽʹΑͬͯෆཁͳίϥϘϨʔγϣϯΛऔΓআ͘͜ͱ͸ ύϑΥʔϚϯε޲্ͷΧΪͱͳΔ ୈ12ճ Πϯλʔωοτͱӡ༻ٕज़γϯϙδ΢Ϝ (2019/12/05) | Takamura Narimichi (@nari_ex) 73
  29. X-as-a-Service ԽͷՌͯ • X-as-a-Service ԽʢνʔϜAPIԽʣΛ௥ٻͨ͠ઌʹӡ༻ʹ͓͚Δσδλ ϧτϥϯεϑΥʔϝʔγϣϯʢDXʣͷੈք͕͋Δ • DXͷੈքʹ͓͚Δӡ༻ٕज़ऀͷՁ஋͸ɺਓ΍ػցͱ Collaboration ͠

    ͳ͕Βຊ࣭తͳ՝୊Λղܾ͢Δ͜ͱʢAPIԽͰ͖ͳ͍͜ͱʣʹऩଋ͢ Δ • ݪҼΑΓࠜڌɺ༧ଌΑΓఏҊɺࣄ࣮ΑΓ݁࿦ • ӡ༻ٕज़ऀ͕շదʹΤϯδχΞϦϯάΛߦ͏͜ͱ͕Ͱ͖Δੈքઢ΁ ୈ12ճ Πϯλʔωοτͱӡ༻ٕज़γϯϙδ΢Ϝ (2019/12/05) | Takamura Narimichi (@nari_ex) 74
  30. ·ͱΊ • ։ൃɾӡ༻ʹؔ͢ΔύϥμΠϜͷมԽΛ͓͞Β͍ • ૊৫ύϑΥʔϚϯεΛ࠷େԽ͢ΔͨΊʹ༷ʑͳٕ๏ɾΞʔΩςΫνϟ͕ొ ৔ • ύϥμΠϜɺHRM΍૊৫࿦ͷ஌ݟΛݩʹӡ༻૊৫ͷઃܭɾӡ༻Λߟ࡯ • αΠζɺ഑ஔɺڥքɺ૬ޓ࡞༻͕૊৫ઃܭͷ؊

    • ϚΠΫϩαʔϏε+SREɺ఻౷తͳ૊৫Ͱͷద༻ྫΛ঺հ • ӡ༻ʹ͓͚Δ DX ʹର͢Δߟ࡯ͱ࣋ଓతʹਐԽ͢Δ૊৫ʹ͓͚Δ՝୊Λڞ༗ ୈ12ճ Πϯλʔωοτͱӡ༻ٕज़γϯϙδ΢Ϝ (2019/12/05) | Takamura Narimichi (@nari_ex) 76