Kubernetesのカスタマイズポイントのまとめ

https://fujitsufjct.connpass.com/event/123320/

Transcript

1. Kubernetesͷ

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

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

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3. 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
   

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4. 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
   

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5. 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
   

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

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7. ͦ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֎
   

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