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࣌ Λ ͔ ͚ Δ ΄ ͱ

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Θ ͨ ͠ Ͱ ͢

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12 ճ ؍ ͨ

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ࠓ೔͸λΠϜϦʔϓ͢Δ ํ๏Λ͝঺հ͠·͢

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ࠓ೔࿩͢͜ͱ • ͏Δ͏ඵʹ͍ͭͯ • ͏Δ͏ඵΛײ͡Δํ๏ • λΠϜϦʔϓ͢Δํ๏

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ࠓ೔࿩͞ͳ͍͜ͱ • ͏Δ͏ඵʹΑΔো֐΁ͷରࡦ

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͏Δ͏ඵʹ͍ͭͯ

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͏Δ͏ඵͱ͸ • ੈքඪ४࣌(UTC) ͱ ੈք࣌(UT1) ͷࠩΛຒΊΔ΋ͷ • 1ඵ૿͑ͨΓݮͬͨΓ͢Δ • ࠓͷͱ͜Ζݮͬͨ͜ͱ͸ͳ͍ • 1972೥ʙ2012೥ͷؒʹܭ25ճ࣮ࢪ • ࣮ࢪ೥ͷ 6݄30೔ ·ͨ͸ 12݄31೔ • 23࣌59෼60ඵ ͕௥Ճ͞ΕΔ • ೔ຊ࣌ؒͩͱ࣍ͷ೔ͷ 8࣌59෼60ඵ

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࣍ճͷ͏Δ͏ඵ • 2015೥6݄30೔ 23࣌59෼60ඵ • ೔ຊ࣌ؒͩͱ 7݄1೔ 23࣌59෼60ඵ • 2012೥Ҏདྷɺ̏೥ͿΓ

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͏Δ͏ඵͱ IT • 2012೥࣮ࢪ࣌ʹ͸ଟ͘ͷ Linux αʔόͰ
 ো֐͕ൃੜ • ରࡦํ๏͸Χʔωϧͱ͔ ntpd ͱ͔ͷ
 όʔδϣϯʹΑͬͯ৭ʑͳͷͰׂѪ • άάΕ (^ω^)

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େखΫϥ΢υϕϯμʔͷରԠ AWS: લޙ12࣌ؒͣͭ ܭ24͔͚࣌ؒͯௐ੔ GCP: લޙ10࣌ؒͣͭ ܭ20͔͚࣌ؒͯௐ੔

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AWS, GCP ʮ͏Δ͏ඵͳΜͯͳ͔ͬͨʯ ( ŋ´Ŗŋʆ)ŪƄź

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͏Δ͏ඵΛײ͡Δํ๏

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NTP ύέοτ

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Leap Indicator • ͏Δ͏ඵ͕͍ۙ͜ͱΛ஌ΒͤΔϑϥά • ݖҖαʔόʹ LI Ϗοτ͕ઃఆ͞ΕΔͱ
 ঃʑʹԼҐ NTP αʔόʹਁಁ͍ͯ͘͠ • LI ϏοτΛड͚औͬͨͱ͖Ͳ͏ରԠ͢Δ͔͸
 ֤ NTP αʔόʹΑͬͯҟͳΔ

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LI Ϗοτͷछྨ 00: ͏Δ͏ඵͳ͠ʢ௨ৗ࣌ʣ 01: ͏Δ͏ඵ͋Γʢ̍ඵ૿΍͢ʣ 10: ͏Δ͏ඵ͋Γʢ̍ඵݮΒ͢ʣ

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LI ϏοτΛ೷͍ͯΈΔ $ ntpq -c rv

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λΠϜϦʔϓ͢Δํ๏

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લఏ஌ࣝ • ntpd Ͱ͸ 23࣌59෼60ඵ ͸ૠೖ͞Εͳ͍ • 23࣌59෼59ඵ ͕̎ඵ෼͋Δ • ʮ60ඵʯΛѻ͑ͳ͍γεςϜ΋͋ΔͨΊ • ʢͱࢥΘΕΔʣ

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ϛϦඵ͸Ͳ͏ͳΔͷʁ ̎ճ໨ͷ 23࣌59෼59ඵ ʹͳͬͨΒ
 ϛϦඵ͸Ϧηοτ͞Ε·͢

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ϛϦඵ͸Ͳ͏ͳΔͷʁ 23:59:59.000000 : 23:59:59.999999 23:59:59.000000 : 23:59:59.999999 00:00:00.000000 ௨ৗͷ 23࣌59෼59ඵ ̎ճ໨ͷ 23࣌59෼59ඵ ʢ͏Δ͏ඵʣ

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ͭ·Γ΅ͨͪ͘͸ɺ ͏Δ͏ඵʹΑͬͯ ̍ඵؒͷ࣌ؒḪߦ͕ Ͱ͖Δɾɾɾͬʂʂʂ

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ͬ͜ɺ͜Ε͸ɾɾɾͬʂ (;ŋ`дŋ´)

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͍͚ͬ͑͑͑ ͑͑͑͑͑͑

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