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Perl in Mercari YAPC::Okinawa 2018 ONNASON
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kazeburo
March 03, 2018
Technology
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Perl in Mercari YAPC::Okinawa 2018 ONNASON
Perl in Mercari
YAPC::Okinawa 2018 ONNASON スペシャルセッション
kazeburo
March 03, 2018
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Transcript
Perl in Mercari 2018 @kazeburo YAPC::Okinawa 2018 ONNASON
େͳ͓Βͤ
memcached UDPϦϑϨΫγϣϯDDoS • Πϯλʔωοτʹެ։͞Ε͍ͯΔmemcached 11211/UDPΛར༻ͯ͠UDP ϦϑϨ Ϋγϣϯ͕ߦ͑Δ • github.com ʹ1.3TbpsͷDDoS߈ܸ͕ൃੜ
(2/28) • ͘͞ΒVPS11211/UDPΛϑΟϧλϦϯά • [ॏཁ] memcachedΛάϩʔόϧʹެ։͠ͳ͍ • UDPΛແޮԽ͢Δɻmemcached -U 0Ͱىಈ memcached-1.5.6ͰσϑΥϧτແޮʹͳΓ·ͨ͠
None
Me • խ • PAUSE:KAZEBURO • גࣜձࣾϝϧΧϦ ϓϦϯγύϧΤϯδχΞ Site Reliability
Engineering (SRE) νʔϜ • BASE, Inc ٕज़ΞυόΠβʔ
None
ϝϧΧϦ • ࠃ࠷େڃͷϑϦϚΞϓϦ • 3Ͱ؆୯ʹग़ 1) ࣸਅΛࡱΔ 2) ใΛهೖ 3)
ग़ϘλϯΛԡ͢ • ҆৺҆શͳܾࡁɾऔҾ • ΤεΫϩʔ(͓ۚͷΓͱΓ͕ࣾؒʹհࡏ) • ಗ໊ૹ
KPI μϯϩʔυ GMV(૯औҾֹ) 1ԯDLҎ্(JP+US+UK) ݄ؒ100ԯԁҎ্ ग़ 1100ສҎ্
ϝϧΧϦΛࢧ͑Δ αʔόαΠυͷ ϓϩάϥϛϯάݴޠ
PHP 7
Golang https://github.com/golang-samples/gopher-vector
ϝϧΧϦΛࢧ͑Δϓϩάϥϛϯάݴޠ • ϝϧΧϦͷAPI΄΅શͯPHPʹΑΓ࣮ • ϚΠΫϩαʔϏε/ϛυϧΣΞͰ Golang ͕த৺ • AI/MLͷͰPythonΘΕΔ
1FSMϝΠϯϦʔϜͳݴޠͰͳ͍
͕͔ͩ͠͠ খ͞ͳ Perl εΫϦϓτ͕αʔϏεͷ҆ఆՔಇΛࢧ͑ ཪํͱͯ͠େنͳτϥϑΟοΫΛॲཧ͍ͯ͠Δɻ
slacklog
slacklog = cronlog + Slack notification
cronlog • cronlog kazuho͞Μ࡞ͷPerlεΫϦϓτɻҾͱͯ͠༩͑ΒΕͨίϚϯ υΛ࣮ߦ͠ɺͦͷऴྃίʔυ͕ඇθϩͷ߹ͷΈɺίϚϯυͷग़ྗ (stdout, stderr)Λඪ४ग़ྗʹૹΔ • cronͰར༻͢Δ͜ͱͰΤϥʔ࣌ͷΈMAILTOʹϝʔϧૹ৴ •
`5 * * * * cronlog -- ping -n 5 my-server 2>&1` • ʮࢹͱܧଓతͳςετʯͱ͍͏ݴ༿ΛੜΈग़ͨ͠
slacklog • ίϚϯυͷऴྃίʔυ͕ඇθϩ࣌ʹඪ४ग़ྗͷૹ৴ʹՃ͑ɺslackͷ௨Λߦ͏ • @channel ΛՃ͢Δ͔ࢦఆՄೳ • ىಈͱऴྃ࣌ʹSlackͷ௨ɺsyslogه • hostname,pid
ͷՃ • slackͷ௨ slackboard Λར༻ • ϝϧΧϦͷ΄΅શͯͷcronͰར༻͍ͯ͠Δ
slacklog use slackboard App Batch MySQL App Batch MySQL App
Batch MySQL JP US UK slacklog slacklog slacklog slacklog slacklog slacklog slacklog slacklog slacklog slackborad slackborad slackborad JP US EU HTTP Load Balancer MySQL slacklog slacklog slacklog SlackͷAPI keyͷҰݩཧ Buffering/Queueing Slack https://github.com/cubicdaiya/slackboard
࣮ߦྫ $ slacklog -c test --log-channel test -- perl -E
'$|=1;say "Hello";sleep 3;die' [2018-02-25T01:09:51][21066] *hostname* starting: perl -E $|=1;say "Hello";sleep 3;die [2018-02-25T01:09:51][21066] Hello [2018-02-25T01:09:54][21066] Died at -e line 1. [2018-02-25T01:09:54][21066] command exited with code:255 $
࣮ߦྫ(slack) ىಈऴྃϩά ίϚϯυͷ STDOUT STDERR
ಋೖޮՌ • batchͷΤϥʔͷݕग़ͱ௨ͷଈ࣌ੑΞοϓ • ϝʔϧ͍ɺ͘͠ΈΒΕͯͳ͍ • αʔόαΠυΤϯδχΞͷslack channelʹૹ৴ɻ࣭ͷ্ • ϩάΛ/dev/nullʹࣺͯͳ͍ӡ༻͕Մೳʹ
ಋೖޮՌ • ʮ͋ͷcronىಈ͍ͯ͠·͔͢ʁʯʮࡢϦϦʔεͨ͠batchɺਖ਼͘͠ಈ͍ ͯ·͔͢ʁʯͷΑ͏ͳΤϯδχΞ͔Βͷ֬ೝґཔͷݮ • τΠϧͷ໓
Ӿཡ ཤྺ SERVICE
Ӿཡཤྺ • ͓٬༷ͷӾཡͷཤྺΛαʔόʹ֨ೲ • UX্ͱͱʹɺTimeline Personalizationͷσʔλ ͱͯ͠׆༻ • ͷӾཡઍreq/sec PerlͰߏங͞Εͨ
ServiceͰॲཧ
App App App App App NGINX API(Perl) Q4M Worker (Perl)
browse_item_service NGINX API(Perl) Q4M Worker (Perl) browse_item_service MySQL MySQL memcached memcached memcached "ߋ৽" "ࢀর" cluster (2) DBߋ৽&ཤྺऔಘ (3) cache࡞ (1) enqueue (1) cacheऔಘ/missͨ͠ΒDB App App App App App memcached memcached memcached NGINX API(Perl) Q4M Worker (Perl) browse_item_service DNS-RR by consul
CPAN modules • API • Plack, Gazelle • Worker •
Parallel::Prefork • ڞ௨ • JSON::XS, DBD::mysql, Cache::Memcached::Fast::Safe Web Application Frameworkະ༻ Plack::(Request|Response)ͬͯͳ͍ XS moduleΛ׆༻্ͯ͠
Performance • API/WorkerScale Out͕Մೳ • GazelleʹΑΔAPIαʔόेʹߴ • ϘτϧωοΫ MySQL ͷϨϓϦέʔγϣϯԆ
• ௨ৗͷϨϓϦέʔγϣϯͰઍ transaction/s ͰԆൃੜ • MySQL 5.7ͷ Multi Thread Slave Λར༻ͯ͠ 18,000 t/s ͕ݶք • Sharding ΛॳظઃܭʹΈࠐΈ
Performance (newRelic) ͝ͱͷPVΛܭଌ ͢Δ Service (Golang) Avg time: 3 msec
Ӿཡཤྺ Service (Perl) Avg time: 4 msec PHP DBͳͲ
http://tech.mercari.com/entry/2018/02/26/110237
Կނ Perl?
ͳͥ Perl ? • kazeburo͕ॻ͍͔ͨΒ • System Call friendly ‣
OS ProcessɺNetwork ͷجૅΛֶͿͷʹద͍ͯ͠Δ • (Core Module ͷΈͰ࡞Ε) Deploy ͕༰қ • PerlͰഓΘΕٕͨज़ͷܧঝ ‣ mixi, livedoor (LINE), DeNA, ͯͳ ͳͲେنWebαʔϏεΛࢧ͑ͯ(͍Δ|͖ͨ)ݴޠ
͜Ε͔Β • ϚΠΫϩαʔϏεɾίϯςφத৺ͷInfrustructure • Serverlessɺk8sʹΑΔࣗಈԽ͞Εͨ Infrastructure • OSnetworkͳͲγεςϜΤϯδχΞϦϯάͷ͕ࣝ։ൃऀ͔Βԕ͘ͳΔ • Golang
த৺ɺPerl ΠϯλϓϦλ͕ͳ͍ڥ
͜Ε͔Β • SREݚमͰPerlΛ৮ͬͯΒ͏ • ৽ଔ͚ʹ1ϲ݄͔Β1ϲ݄ఔͷSREݚमΛߦ͍ͬͯΔ • ͦͷதͰͻͱͭPerlΛͬͨΈʹ৮ΕΔػձΛͭ͘Δ • slacklogͷىಈϩάΛSlackʹૹΔػೳSREݚमͰ࡞ͬͯΒͬͨͷ •
OSɾFile SystemɾProcessɾNetworkͱ͍ͬͨϨΠϠʔͷڵຯɾؔ৺ UNIX ֶʹ৮ΕΔػձ • ٕज़ͷఈ্͛ʹඞཁͳݴޠͷҰͭ
Ҏ্ careers.mercari.com/job/