meetup_topic__1.pdf

Kubernetes Wakaran Tokyo #1にて扱う問題です。

Transcript

1. Kubernetes Wakaran Tokyo #1
   Discussion Theme
   

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2. Prerequisite Knowledge
   

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3. What’s Kubernetes
   • ίϯςφԽ͞ΕͨΞϓϦέʔγϣϯ΍αʔϏεΛ
   ؅ཧ͢ΔͨΊͷΦʔϓϯιʔεϓϥοτϑΥʔϜ
   ϩʔϦϯάΞοϓσʔτ
   εέʔϦϯά / ΦʔτεέʔϦϯά
   ίϯςφͷࢮ׆؂ࢹ
   ো֐࣌ͷηϧϑώʔϦϯά
   etc…
   

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4. What’s Container
   • ಉ͡OS্Ͱ෼཭͞ΕͨίϯςφۭؒΛ༻ҙ͠ɺݸʑʹΞϓϦέʔ
   γϣϯ΍ϥΠϒϥϦΛಈ͔͢͜ͱ͕Ͱ͖Δɻ
   • ΞϓϦέʔγϣϯʹՃ͑ͯɺOS ͱͦͷؔ࿈πʔϧ͕༰ྔʹؚ·ΕΔ
   VMͱൺֱ͢ΔͱϦιʔε໘Ͱͷܰྔੑ΍ɺىಈεϐʔυͷ଎͞ͳͲ
   ͷϝϦοτ͕͋Δଞɺϝϯςφϯεͷ؆қԽ౳༷ʑͳར఺͕͋Δɻ
   ෺ཧαʔό ෺ཧαʔό
   ϗετOS ϋΠύʔόΠβʔ
   Ծ૝ԽSW ήετOS ήετOS
   ήετOS
   ήετOS
   app
   app
   app app
   app app app
   ෺ཧαʔό
   ίϯςφΤϯδϯ
   VM Container
   

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5. What’s Pod
   • KubernetesͰ࡞੒͓Αͼ؅ཧͰ͖ΔɺσϓϩΠ
   Մೳͳ࠷খͷίϯϐϡʔςΟϯά୯Ґɻ
   • 1ͭҎ্ͷίϯςφͰߏ੒͞ΕΔɻ
   • Podʹ͸1ͭͷNic͕༩͑ΒΕɺίϯςφؒͰͦͷ
   1ͭͷNicΛڞ༗͢Δɻ
   

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6. Today’s Topic
   1-1. Podͷ࡞੒
   1-2. Serviceͷ࡞੒
   1-3. Replicaͷੜ੒
   ~ ൃల ~
   2-1. Updateઓུ
   

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7. Podͷ࡞੒
   ྡͷmanifestʹҎԼͷࣄ߲Λ௥هͯ͠ɺ
   PodΛ࡞੒͠·͠ΐ͏
   • Container name: nginx
   • Image: nginx (version 1.17.5)
   • Port: 80
   

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8. Serviceͷ࡞੒
   ྡͷmanifestΛ༻͍ͯɺService Λ࡞੒͠·͢ɻ
   ͦͷޙɺlocalhost:30080ʹΞΫηεͯ͠ɺ
   ҎԼͷΑ͏ͳը໘͕ग़Δ͜ͱΛ֬ೝ͠·͢ɻ
   

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9. Replicaͷੜ੒
   • ೚ҙͷWorkloads ResourceΛ༻͍ͯɺ[1. Podͷ࡞੒]Ͱ࡞੒ͨ͠podΛ
   4 replicaͷϦιʔεͱͯ͠࡞੒͍ͯͩ͘͠͞ɻ
   ·ͨɺͦͷWorkloads ResourceΛબ୒ͨ͠ཧ༝ʹ͍ͭͯ·ͱΊͯΈ·͠ΐ͏ɻ
   Workloads Resource:
   Pod, ReplicaSet, Deployment, DaemonSet, StatefulSet
   Updateઓུ
   • [3. Replicaͷੜ੒]ʹͯ࡞੒͞ΕϦιʔεʹ࢖༻͞Ε͍ͯΔnginxͷversionΛ1.17.7
   ʹ্͛Α͏ͱߟ͍͑ͯ·͢ɻμ΢ϯλΠϜ͕ͳ͍Α͏ʹΞοϓσʔτΛ͢Δʹ͸ɺ
   ɹmanifestʹ͓͍ͯɺͲͷΑ͏ͳ͜ͱΛઃఆ͢Δඞཁ͕͋ΔͰ͠ΐ͏͔ɻ
   ɹཧ༝΋ؚΊͯɺmanifestΛߏ੒ͯ͠Έ͍ͯͩ͘͞ɻ
   

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10. ൃද಺༰
    1. [Replicaͷੜ੒]ʹ͓͍ͯɺ
    1-1. ͲͷWorkloads ResourceΛબ୒ͨ͠ͷ͔
    1-2. ͳͥͦΕΛબ୒ͨ͠ͷ͔
    2. [Updateઓུ]ʹ͓͍ͯ
    2-1. ͲͷΑ͏ͳmanifestΛߏஙͨ͠ͷ͔
    2-2. manifestΛߏங͢Δʹ͋ͨΓɺԿΛߟྀͨ͠ͷ͔
    (strategy΍maxSurge, maxUnavailableͳͲ)
    

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