Kubernetesͷ
 ΧελϚΠζϙΠϯτͷ·ͱΊ ෋࢜௨ݚڀॴ ਓ޻஌ೳݚڀॴ @kuromt_ 1

ࣗݾ঺հͱຊ೔ͷ͓࿩ • TwitterΞΧ΢ϯτ: @kuromt_ • ॴଐɿ෋࢜௨ݚڀॴɹਓ޻஌ೳݚڀॴ – ػցֶशج൫ΛKubernetes্ʹߏஙͯ͠2೥ؒۙ͘ӡ༻த • ຊ೔ͷ͓࿩ - KubernetesΛ֦ு͢Δํ๏ͷ·ͱΊ • KubernetesΛ࢖ͬͨج൫Λߏங͢Δͱ͖ʹ஌͍ͬͯΔͱศར 2

KubernetesͷجຊతͳॲཧͷྲྀΕ ●Reconciliation Loop - Controller͕ϦιʔεΛ๬Ήঢ়ଶʹ͚ۙͮΔ APIServer Controller watch ๬Ή ঢ়ଶ Resource diff action Resource Resource ೝূ ೝՄ Admission Controller 1. ๬Ήঢ়ଶ͕ॻ͖׵Θͬͨ͜ͱΛݕ஌ 2. ๬Ήঢ়ଶͱ࣮ଶͷࠩ෼Λ֬ೝ 3. ๬Ήঢ়ଶʹ͚ۙͮΔΑ͏ʹॲཧΛ࣮ߦ ϦΫΤετ 3 Pod͕3ͭ replicas: 3

Admission Controller ●ೝূɺೝՄΛࡁ·ͤͨ͋ͱʹϦΫΤετΛϋϯυϧ͢Δ֦ு - APIServerىಈ࣌ʹద༻͢ΔAdmission Controller - ॲཧ಺༰Λࣗ෼Ͱ࣮૷͠ޙ͔Β௥ՃՄೳͳDynamic Admission Controller APIServer Controller watch ๬Ή ঢ়ଶ Resource diff action Resource Resource ೝূ ೝՄ Admission Controller ϦΫΤετ Dynamic Admission Controller 4

Custom Resource Definition ●APIServerʹಠࣗͷϦιʔεΛొ࿥͢Δ࢓૊Έ - ରԠ͢ΔControllerΛࣗ෼Ͱ࣮૷͢Δඞཁ͕͋Δ Custom Controller watch ๬Ή ঢ়ଶ Resource Resource Custom Resource diff action ϦΫΤετ ೝূ ೝՄ Admission Controller APIServer 5

Aggregated APIServer ●APIServerͷ໾ׂΛ࣋ͭαʔόΛผ్༻ҙ͢Δ֦ு - APIServerʹ͋ΔAggregated Layer͕ϓϩΩγͱͯ͠ৼ෣͏ - Aggregated APIServer͸ࣗ෼Ͱ༻ҙ͢Δ APIServer ೝূ ೝՄ ϦΫΤετ Aggregated APIServer 6

ͦΕͧΕͷΧελϚΠζϙΠϯτͷ੔ཧ 7 ࣮૷ ॊೈੑ ༻్ Admission Contoller ෆཁ ࣄલʹܾΊΒΕͨϙϦγʔ ͷΈΛ࢖͏ͷͰ௿͍ ϦΫΤετ಺༰ͷϋϯυϧ Dynamic Admission Controller ඞཁ ͋Δఔ౓੍໿͕͋Δ͕ൺֱ తࣗ༝ ϦΫΤετ಺༰ͷϋϯυϧ Custom Resource Definition ඞཁ ͋Δఔ౓੍໿͕͋Δ͕ൺֱ తࣗ༝ ಠࣗϦιʔεͷ௥Ճͱ؅ཧ Aggregated API Server ඞཁ ΄ͱΜͲ੍໿͕ͳࣗ͘༝ ্هҎ֎