AWSではてなブログの常時HTTPS配信をバーンとやる話 / The Epic of migration from HTTP to HTTPS on Hatena Blog with AWS

by aereal

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AWSͰ͸ͯͳϒϩάͷ  ৗ࣌HTTPS഑৴Λ  όʔϯͱ΍Δ࿩ Hatena Engineer Seminar #10 @ Tokyo גࣜձࣾ͸ͯͳ id:aereal

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ࣗݾ঺հ • id:aereal • GitHub: aereal • Twitter: aereal • ϒϩάϢʔβʔνʔϜ  ΞϓϦέʔγϣϯΤϯδχΞ  ςοΫϦʔυ

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࿩͢͜ͱ • ͸ͯͳϒϩάͷৗ࣌HTTPS഑৴ͷٕज़తͳৄࡉ • ূ໌ॻͷಈతಡΈࠐΈ • ূ໌ॻͷࣗಈߋ৽ • ͓ΑͼϓϩδΣΫτͷਐΊํ

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എܠ • ͸ͯͳϒϩάͰ͸ɺ͸ͯͳఏڙυϝΠϯͷ  ͍ͣΕ͔͔Βબ΂·͢ • *.hatenablog.com, *.hatenadiary.jp, etc. • ͞Βʹɺ͸ͯͳϒϩάPro (༗ྉΦϓγϣϯ) ʹਃ͠ࠐΉͱ  ಠࣗυϝΠϯ͕࢖͑·͢ • ಠࣗυϝΠϯͰ΋ৗ࣌HTTPS഑৴Λ࣮ݱ͍ͨ͠

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Let's Encrypt • https://letsencrypt.org/ • ISRG = Internet Security Research Group͕ఏڙ͢Δ  ϓϩάϥϚϒϧʹΞΫηεՄೳͳೝূہ (CA) • ෆಛఆଟ਺ͷυϝΠϯʹର͢Δ  ূ໌ॻൃߦͷࣗಈԽ͕Մೳʹͳͬͨ

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Let's Encrypt • ಠࣗυϝΠϯͷৗ࣌HTTPS഑৴ʹ͔ܽͤͳ͍ଘࡏɺ౰વ ར༻͠·͢ • Let's EncryptΛར༻͢Δاۀͱͯ͠ɺ  ·ͨܝ͛Δࢥ૝ʹڞײ͢ΔWebαʔϏεࣄۀऀͱͯ͠ɺ  ͸ͯͳ͸Let's Encryptʹد෇Λ͠·͢

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ಠࣗυϝΠϯͱূ໌ॻ • DONE: ͸ͯͳఏڙυϝΠϯ (*.hatenablog.com, etc.) • ਺͕஌Ε͍ͯΔͷͰূ໌ॻ1ͭͷ഑ஔͰࡁΉ • SAN (= Subject Alternative Names) Λ࢖͏ • ϫΠϧυΧʔυূ໌ॻΛ࢖͏

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ಠࣗυϝΠϯͱূ໌ॻ • ಠࣗυϝΠϯ • ਺͕ଟ͍ͷͰূ໌ॻͷൃߦ΋ಡΈࠐΈ΋େม • LE = Let's Encrypt͸ূ໌ॻ͋ͨΓ  100υϝΠϯͷ੍໿͕͋Δ • Ұ౓ʹಡΈࠐΉͱproxyͷϝϞϦ࢖༻ྔ͕ਹΉ

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ΰʔϧ(1): ূ໌ॻͷಡΈࠐΈ • ؆୯ͷͨΊূ໌ॻ͸1υϝΠϯ1ͭɺSAN͸࢖Θͳ͍ • ΦϯσϚϯυͰಡΈࠐΜͰϝϞϦઅ໿ • ϘτϧωοΫʹͳΓ͏ΔͷͰ  ϥ΢ϯυτϦοϓɺϨΠςϯγΛ཈͍͑ͨ

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ΰʔϧ (2): ఆظߋ৽ • ϦΞϧλΠϜੑ͸௿͍ • ظݶΛܴ͑Δ·Ͱͷ೚ҙͷλΠϛϯάͰ  ࣮ߦ͢Ε͹Α͍ • ҰํɺσʔλҰ؏ੑʹର͢Δཁٻ͕ߴ͍ • ࣦഊ͢ΔͳͲߋ৽࿙Ε͕͋Δͱ·͍ͣ • ֎෦API (LE) Λར༻͢ΔͨΊࣦഊՄೳੑ͕ߴ͍  →ద੾ͳϦτϥΠॲཧ͕ඞཁ

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γεςϜͷߏ੒

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cert-dispatcher cert-cache-gw cert-updater-state cert-updater-function cert-update-notiﬁer cert-update-trigger Let's Encrypt cert-store cert-cache cert-lifecycle-store User Blog HTTP ssl_handshake_handler HTTP Get/Set Get HTTP HTTP ࣮ߦ ࣮ߦ ࣮ߦ UpdateItem UpdateItem TTL trigger ࣮ߦ ূ໌ॻൃߦ

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ূ໌ॻͷಡΈࠐΈ

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cert-dispatcher cert-cache-gw cert-updater-state cert-updater-function cert-update-notiﬁer cert-update-trigger Let's Encrypt cert-store cert-cache cert-lifecycle-store User Blog HTTPS ssl_handshake_handler HTTP Get/Set Get HTTP HTTP ࣮ߦ ࣮ߦ ࣮ߦ UpdateItem UpdateItem TTL trigger ࣮ߦ ূ໌ॻൃߦ

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ূ໌ॻͷಈతಡΈࠐΈ • cert-dispatcher: ngx_mruby • TLS handshake࣌ʹϋϯυϥ͕ݺ͹ΕΔ • cert-cache-gwʹHTTP GETͯ͠ূ໌ॻΛऔಘ͢Δ • cert-cache-gw: GoͰॻ͍ͨHTTP API • υϝΠϯʹରԠ͢Δূ໌ॻΛcert-store (DynamoDB) ͔ Βऔಘͯ͠ฦ͢ • cert-cache (memcached) ʹ΋อଘ͢Δ

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ূ໌ॻͷऔಘ

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ূ໌ॻͷൃߦ • cert-updater-state: AWS Step Functions • JSONͰεςʔτϚγϯΛ࣮ߦͯ͘͠ΕΔαʔϏε • ॊೈͳϦτϥΠॲཧ΍ঢ়ଶભҠΛ؅ཧͰ͖Δ • cert-updater-function: AWS Lambda • LEͱ௨৴͠ূ໌ॻΛऔಘ͢Δ • ൃߦͨ͠ূ໌ॻ͸DynamoDBʹॻ͖ࠐΉ • cert-update-notiﬁer: AWS Lambda • ূ໌ॻͷൃߦঢ়گΛ͸ͯͳϒϩάຊମʹ఻͑Δ

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ূ໌ॻͷఆظߋ৽

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ূ໌ॻͷఆظߋ৽ • cert-lifecycle-store: DynamoDB • ূ໌ॻͷऔಘ࣌ʹ͜ͷςʔϒϧʹ΋ॻ͖ࠐΉ • TTL triggerΛൃߦ͠ɺcert-update-triggerΛىಈ͢Δ • cert-update-trigger: AWS Lambda • TTL͕੾Εͯ࡟আ͞ΕͨΞΠςϜΛड͚औΔ • cert-updater-stateΛ࣮ߦ͠ɺূ໌ॻऔಘϑϩʔΛ։࢝

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DynamoDB TTL

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cert-lifecycle-store  (DynamoDB) Domain: ex1.example.com ExpiresAt: 2018-05-23T02:00:00 Domain: ex2.example.com ExpiresAt: 2018-05-23T03:00:00 Domain: ex2.example.com ExpiresAt: 2018-05-23T04:00:00 Domain: ex2.example.com ExpiresAt: 2018-05-23T05:00:00

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cert-lifecycle-store  (DynamoDB) Domain: ex2.example.com ExpiresAt: 2018-05-23T03:00:00 Domain: ex2.example.com ExpiresAt: 2018-05-23T04:00:00 Domain: ex2.example.com ExpiresAt: 2018-05-23T05:00:00

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cert-lifecycle-store  (DynamoDB) Domain: ex2.example.com ExpiresAt: 2018-05-23T04:00:00 Domain: ex2.example.com ExpiresAt: 2018-05-23T05:00:00

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cert-lifecycle-store  (DynamoDB) Domain: ex2.example.com ExpiresAt: 2018-05-23T05:00:00

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ͳͥAWS͔ • ෳࡶ͔ͭߴ౓ͳόονΛߏஙʹඞཁͳαʔϏε͕  ἧ͍ͬͯΔ͔Β • ෳࡶ: ূ໌ॻͷऔಘɾ݁Ռͷ௨஌ͳͲෳ਺εςοϓ͔Β ͳΔ • ߴ౓: ෼ࢄΞϓϦέʔγϣϯʹ΋ؔΘΒͣ  σʔλͷҰ؏ੑ͕ߴ͍ϨϕϧͰٻΊΒΕΔ • = Lambda, Step Functions, etc.

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Step Functions͸࠷ߴ • ग़ྗ಺༰ʹԠͯ͡ঢ়ଶભҠΛ෼ذͰ͖Δ • άϥϑΟΧϧʹग़ྗͯ͘͠ΕΔ (͍͢͝!) • Τϥʔग़ྗ಺༰ʹԠ্ͨ͡ݶ෇͖ϦτϥΠॲཧ • ΊͪΌͪ͘Ό͔ͬ͜Α͘ͳ͍Ͱ͔͢?

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Go • Lambda function͸͢΂ͯGo, cert-cache-gw΋Go • ίϯύΠϥʹΑΔܕݕࠪͰ҆৺ • ೖग़ྗͷܕΛLambda functionؒͰڞ༗Ͱ͖ɺ  ᴥᴪ͕ੜͨ͡ΒίϯύΠϧΤϥʔʹͳΔ • ΤίγεςϜ͕੒ख़͍ͯ͠Δ • ΫϩείϯύΠϧ • ςετϥϯφʔɺςετϑϨʔϜϫʔΫ

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ϓϩδΣΫτͷਐΊํ • ΞʔΩςΫνϟΛݕ౼ • AWSΛۦ࢖ͨ࣍͠ੈ୅TSDBͷઃܭʹؔΘͬͨ  id:y_uukiʹڠྗͯ͠΋Βͬͨ • http://blog.yuuk.io/entry/the-rebuild-of-tsdb-on-cloud • ϓϩτλΠϐϯά (1िؒ) • ࣮ࡍʹखΛಈ͔͢͜ͱͰෆ໌ྎͩͬͨ఺ͷݟੵ΋Γ͕ਖ਼֬ʹͳͬͨ • (LambdaͷσϓϩΠͳͲ) • Goॳֶऀͩͬͨϝϯόʔ΋צΛ௫Ίͯɺຊ࣮૷Ͱ૝ఆҎ্ʹ  ϕϩγςΟ͕҆ఆͨ͠

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ϓϩδΣΫτͷਐΊํ • ·ͣূ໌ॻಡΈࠐΈ෦෼ (cert-loader) Λ։ൃ • ͜ͷ࣌఺Ͱ͸·ͩূ໌ॻΛऔಘ͠ͳ͍ͷͰɺӨڹ͸ͳ ͍ • ࣍ʹূ໌ॻऔಘ෦෼ (cert-updater) Λ։ൃ • ͜ͷ෦෼ΛϦϦʔε͢Δ͜ͱͰ͸͡Ίͯ  ಠࣗυϝΠϯͰHTTPS഑৴͕ར༻ՄೳʹͳΔ

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ϓϩδΣΫτͷਐΊํ • ϦϦʔε୯ҐͷCQS = ίϚϯυΫΤϦ෼ׂ͕ͳ͞Εͨ • command: cert-updater • query: cert-loader • CQS = Command-query Separation: • มߋܥ (command) ͱಡऔܥ (query) Λ  ෼ׂ͢ΔΞʔΩςΫνϟ • େ͖ͳϦϦʔεͰ͋Δ͕ɺগͣͭ͠ग़͍ͯ͘͠ͱ͍͏  ීஈͷελΠϧΛऔΓೖΕΒΕ͍ͯΔ

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·ͱΊ • ͸ͯͳϒϩάͷৗ࣌HTTPS഑৴ͷཪଆΛ͝঺հ͠·ͨ͠ • ։ൃ͸ॱௐͰɺࠂ஌௨ΓͷεέδϡʔϧͰ  ఏڙ։࢝Ͱ͖ΔݟࠐΈͰ͢ • ࣮͸Perl͚ͩ͡Όͳ͍͠ɺAWS΋׆༻͍ͯ͠·͢!

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એ఻: αϚʔΠϯλʔϯ2018 • http://developer.hatenastaﬀ.com/entry/intern- preentry-2018 • ࠓ೥΋΍Γ·͢ • લ൒ߨٛͷݴޠ͸GoͰ͢