マイクロサービス化を支える継続的切り替え術

by Shia

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ϚΠΫϩαʔϏεԽΛࢧ ͑Δܧଓత੾Γସ͑ज़ TIJB!ΫοΫύου

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ࣗݾ঺հ w γϜαϯϤϯ !TIJB w ΫοΫύουגࣜձࣾ

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ࠓ೔ͷ࿩͸ wϞόΕͽ෼཭ ‣ γεςϜ෼཭࣌ͷ੾Γସ͑ઓུ

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ϞόΕͽͱ͸ wΨϥέʔ޲͚ͷαʔϏε wػೳ௥Ճ͸΄΅͍ͯ͠ͳ͍ wΞΫςΟϒͳϢʔβʔ͸ݮΒͳ͍

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෼཭ͷ֓ཁ

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෼཭ͷϙΠϯτ wڊେͳϞϊϦγοΫΞϓϦ͔Βͷ෼཭ w"1*ܦ༝ͰϦιʔεΛऔಘ͢Δ ‣ %#XJUIOαʔϏε͸ਏ͍ ‣ ͢Ͱʹ࢖͑ΔϦιʔε"1*͕͋Δ

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෼཭ͷϙΠϯτ DB

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෼཭ͷϙΠϯτ DB API αʔϏε

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෼཭ͷϙΠϯτ w݁ՌɺϏδωεϩδοΫ͸΄΅࠶࣮૷ʹ

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෼཭ͷن໛ײ wΤϯυϙΠϯτͷ਺͸ݸ΄Ͳ w෼཭ݩίʔυ͸໿ສߦ΄Ͳ

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੾Γସ͑ઓུΛߟ͑Δ

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ཁ݅ wҰؾʹ੾Γସ͑ͳ͍ʂʂʂʂʂ ‣ ࣄނͬͨ৔߹ɺ֬ೝ͠ͳ͍ͱ͍͚ͳ͍ίʔ υͷ෼ྔ͕ଟ͍ ‣ ͦ΋ͦ΋ࣄނΔ֬཰͕ߴ͍͔Β΍Ί͓͍ͯ ͨ΄͏͕͍͍

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ͭ·ΓɺͲͬͪʹྲྀ͔͢ Ͱ͖Δ͚ͩࡉ੍͔͘ޚ͍ͨ͠

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چαʔϏε ཁ݅ ৽αʔϏε GET /recipes

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چαʔϏε ཁ݅ ৽αʔϏε ͦΕҎ֎ GET /recipes

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ख๏MPDBUJPOͰؤுΔ location /recipes { proxy_pass new_service; } location / { proxy_pass old_service; }

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چαʔϏε ৽αʔϏε ͦΕҎ֎ GET /recipes ख๏MPDBUJPOͰؤுΔ

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ख๏MPDBUJPOͰؤுΔ ࣮૷Λ༻ҙ͢Δ ৽αʔϏεΛσϓϩΠ /(*/9ͷઃఆΛߋ৽ͯ͠Ϧϩʔυ

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ख๏MPDBUJPOͰ͸ؤுΕͳ͍ wσϓϩΠຖʹ/(*/9ͷઃఆΛॻ͖௚͠ ͍ͨʁ wύε͸ಉ͚ͩ͡Ͳॲཧ͸ҧ͏৔߹͸ʁ ‣ (&5SFDJQFTWT1045SFDJQFT

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ਅͷཁ݅ w੾Γସ͑खॱΛ؆୯ʹ͍ͨ͠ wΤϯυϙΠϯτ ΞΫγϣϯ ୯ҐͰ੾ Γସ͍͑ͨ

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৽αʔϏεʹ੾Γସ͑ͷ ܾఆݖΛҠৡ͢Δ

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w৽αʔϏε͸ ‣ ॲཧՄೳͳΒॲཧͯ͠ฦ͢ ‣ ແཧͳΒແཧͱฦ͢ ख๏੾Γସ͑ͷܾఆݖΛҠৡ͢Δ

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ख๏੾Γସ͑ͷܾఆݖΛҠৡ͢Δ چαʔϏε ৽αʔϏε

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ख๏੾Γସ͑ͷܾఆݖΛҠৡ͢Δ چαʔϏε ৽αʔϏε GET /recipes 200 OK 200 OK

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ख๏੾Γସ͑ͷܾఆݖΛҠৡ͢Δ چαʔϏε ৽αʔϏε GET /recipes Ҏ֎ ະ࣮૷ͩΑʂʂ

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ख๏੾Γସ͑ͷܾఆݖΛҠৡ͢Δ چαʔϏε ৽αʔϏε GET /recipes Ҏ֎ 200 OK 200 OK ະ࣮૷ͩΑʂʂ

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w৽αʔϏεଆΛσϓϩΠ͢Δ͚ͩͰ͢΂ ͕ͯ׬݁͢Δ ख๏੾Γସ͑ͷܾఆݖΛҠৡ͢Δ

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ख๏࣮૷ྫ upstream backend { server new_service max_fails=0; server old_service backup; } server { location / { proxy_next_upstream http_503 non_idempotent; proxy_pass backend; } } ৄ͍͠આ໌͸͜͜ͰݟΕ·͢ https://techlife.cookpad.com/entry/2019/03/05/115000

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ऴΘΓ wͪΐͬͱؤுΕ͹ࡉ͔͍୯ҐͰɺ҆શʹ ָͯ͠੾Γସ͕͑Ͱ͖Δ