検索基盤を安全にElasticsearchに置き換えるためにやったこと

by Hiroki Sakamoto

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Hiroki Sakamoto  @taisho6339 ݕࡧج൫Λ҆શʹ  Elasticsearchʹஔ͖׵͑ΔͨΊʹ΍ͬͨ͜ͱ

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ຊࢿྉͰऔΓ্͛Δ಺༰ DBݕࡧ͔ΒElasticsearchʹ҆શʹஔ͖׵͑Δͱ͖ʹɺ μʔΫϩʔϯν΍FeatureToggleΛ׆༻ͯ҆͠શʹϦϦʔεͨ͠஌ݟ   https://www.elastic.co/jp/

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ຊࢿྉͰड़΂ͳ͍͜ͱ • ESͷجૅతͳ෦෼ • ESͷΠϯσοΫεɺΫϥελઃܭ • ΠϯσΫγϯά΍ݕࡧͷࡉ͔͍࣮૷ʹ͍ͭͯ • Feature Toggleͷ۩ମతͳ࣮૷ʹ͍ͭͯ

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࣮ࢪͨ͠αʔϏεཁ݅ • Ϣʔβ਺100ສਓҎ಺ఔ౓ͷձһ੍SNSαʔϏε • Ϣʔβͷݕࡧػೳ͕͋Δ • ଐੑ஋(ੑผɺ೥ྸɺझຯͳͲ)ΛݩʹύϥϝʔλͰݕࡧ • MySQLαʔό΁SELECTจΛൃߦ͢Δ͜ͱͰݕࡧΛ࣮ݱ • ϑϦʔϫʔυݕࡧͳͲ͸ͳ͍

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αʔϏεͷ՝୊ײ ݕࡧύϥϝʔλ͸छྨఔ౓ࢦఆͰ͖ɺ  શͯͷύϥϝʔλʹΠϯσοΫε͕ޮ͘Θ͚Ͱ͸ͳ͍ ςʔϒϧϑϧεΩϟϯ͕සൃ  αʔό୆਺ͰεέʔϧͰ͖ͳ͍

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αʔϏεͷ՝୊ײ ύϑΥʔϚϯεΛग़͠ɺ͔ͭαʔϏεͷ੒௕ʹ߹Θͤͯ  εέʔϧͤ͞ΒΕΔج൫͕ඞཁͩͬͨ

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ElasticsearchΫϥελͷߏங

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ΞʔΩςΫνϟ master data ؂ࢹ΍؅ཧ ΞϓϦέʔγϣϯαʔό ݕࡧ όοναʔό ΠϯσΫγϯά

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ΞʔΩςΫνϟ • ϕʔγοΫͳESΫϥελ • master͸৑௕Խ & εϓϦοτϒϨΠϯରࡦͰ3୆ • data͸৑௕Խ͢Δ࠷খ୯ҐͰ2୆ • ΞϓϦέʔγϣϯαʔό͔Βdataϊʔυʹରͯ͠ݕࡧ • ΠϯσΫγϯά͸όονͰఆظతʹߦ͏(χΞϦΞϧλΠϜ) • ߋ৽ର৅͸ΩϡʔΠϯά

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ϦϦʔεʹ൐͏՝୊ײ ݕࡧ݁Ռଥ౰ੑͷ୲อ Կ͔͋ͬͨͱ͖ͷ &4ো֐࣌ͷݕࡧ͸Ͳ͏ͳΔͷ͔ʁ

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ϦϦʔεʹ൐͏՝୊ײ ݕࡧ݁Ռଥ౰ੑͷ୲อ &4ো֐࣌ͷݕࡧ͸Ͳ͏ͳΔͷ͔ʁ ଧͪख μʔΫϩʔϯν

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μʔΫϩʔϯν ʮμʔΫ ϩʔϯνͱ͸Կ͔ : CRE ͕ݱ৔ͰֶΜͩ͜ͱʯ  https://cloudplatform-jp.googleblog.com/2017/08/CRE-life-lessons- what-is-a-dark-launch-and-what-does-it-do-for-me.html

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μʔΫϩʔϯν ΞϓϦέʔγϣϯαʔό MySQL ྆ํʹݕࡧཁٻ

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μʔΫϩʔϯν ΞϓϦέʔγϣϯαʔό MySQL ݕࡧ݁ՌΛൺֱ

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μʔΫϩʔϯν ΞϓϦέʔγϣϯαʔό MySQL ҰఆҎ্ͷࠩҟ͕͋Δͱ͖ʹ  ूܭ༻ʹϩάΛు͘

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μʔΫϩʔϯν ΞϓϦέʔγϣϯαʔό MySQL ࣮ࡍʹฦ͢ͷ͸DBͷ݁Ռ Ϩεϙϯε

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μʔΫϩʔϯν ϩάूܭݕূ σϓϩΠ վम ζϨ͕ڐ༰஋Λ੾Δ·Ͱ  վળαΠΫϧΛ܁Γฦͨ͠

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ϦϦʔεʹ൐͏՝୊ײ &4ো֐࣌ͷݕࡧ͸Ͳ͏ͳΔͷ͔ʁ &4ো֐࣌ͷݕࡧ͸Ͳ͏ͳΔͷ͔ʁ ଧͪख Feature Toggleͷ׆༻

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Feature Toggle • σϓϩΠແ͠ͰಈతʹػೳͷON/OFFΛ͢ΔͨΊͷ֓೦ɻ • ༗໊ͳ࣮૷ϥΠϒϥϦͩͱJava੡ͷFF4JͳͲ͕͋Δɻ • ୯७ͳON/OFF͚ͩͰͳ͘ɺಛఆͷ৚݅ͷϢʔβʹ௨ৗͱ͸ҧ ͏΋ͷΛग़͠෼͚ͨΓ͢Δ͜ͱ͕Ͱ͖Δ • FeatureToggles  https://martinfowler.com/articles/feature-toggles.html#OpsToggles 

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Feature Toggle ࣮૷Πϝʔδ if( isEnableFeature(“FEATURE_ES_SEARCH”) ) { // ElasticsearchͰͷݕࡧ } else { // DBͰͷݕࡧ } ͜ͷΑ͏ͳ࣮૷Λ͓ͯ͘͠ͱɺ  ؅ཧը໘͔ΒಈతʹϑϥάΛOFFʹͰ͖Δ

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Feature Toggle ࣮૷Πϝʔδ ग़య: http://ff4j.org/ ͜͜ͷON/OFFͰϑϥά͕มΘΔ!

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Feature Toggleͷ׆༻ ΞϓϦέʔγϣϯαʔό MySQL Toggle͕ON

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Feature Toggleͷ׆༻ ΞϓϦέʔγϣϯαʔό MySQL Toggle͕OFF Toggle͕OFFͷͱ͖͸DBͰݕࡧͤ͞Δ

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Feature Toggleͷ׆༻ data ΞϓϦέʔγϣϯαʔό ݕࡧ όοναʔό ΠϯσΫγϯά Τϥʔൃੜʂ Τϥʔൃੜʂ ElasticsearchͰΠϯσΫγϯάɺ΋͘͠͸ݕࡧͰɺ  Τϥʔ͕ҰఆҎ্ग़ͨ৔߹͸ࣗಈతʹToggleΛOFFʹ͢Δ

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Feature Toggle ؅ཧը໘͔Βͷखಈ੾Γସ͑ɺESΤϥʔݕग़࣌ͷࣗಈ੾Γସ͑ʹ ΑͬͯɺσϓϩΠແ͠ͰDBݕࡧ΁ϑΥʔϧόοΫ Կ͔͋ͬͨͱͯ͠΋Ϣʔβ΁ͷӨڹΛ࠷খݶʹ

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݁Ռ • ϦϦʔεޙ2ϲ݄ܦա͍ͯ͠Δ͕ো֐ൃੜ0݅ɻ • (ϨεϙϯελΠϜ͸28ഒվળ)

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·ͱΊ • Լهͷγϯϓϧͳ͕Βڧྗͳߟ͑ํͰো֐0ͰϦϦʔε • μʔΫϩʔϯνͰຊ൪؀ڥͷτϥϑΟοΫͰ݁ՌݕূΛߦͬͨ • Feature Toggleͷ׆༻Ͱ͙͢ʹϑΥʔϧόοΫ