Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
Rails6.0 での複数 DB 対応
Search
Yuta Horii
July 31, 2019
Programming
2
500
Rails6.0 での複数 DB 対応
Talked at Ebisu.rb #24
https://ebisurb.connpass.com/event/138395
Yuta Horii
July 31, 2019
Tweet
Share
More Decks by Yuta Horii
See All by Yuta Horii
クレジットカードを製造する技術
yutadayo
90
59k
カード発行会社(イシュア)を 支えるシステム解説
yutadayo
4
2.7k
Fintechプロダクトの開発事情とアーキテクチャ解説
yutadayo
2
3k
なぜレッドオーシャン化する前にサービスを グロースできなかったのか? - フリマアプリ編 - @yutadayo
yutadayo
104
79k
PCI DSS に準拠したシステム開発
yutadayo
2
1.3k
決済サービス 0 → 1 開発時のアーキテクチャについて / Start up × FinTech
yutadayo
2
1.8k
Rails Secrets の歴史
yutadayo
0
390
フリマアプリ「フリル」を支える Elasticsearch を用いた全文検索入門
yutadayo
1
1.1k
Rubyとスタートアップ
yutadayo
1
990
Other Decks in Programming
See All in Programming
color-scheme: light dark; を完全に理解する
uhyo
5
420
Rails アプリ地図考 Flush Cut
makicamel
1
120
ソフトウェアエンジニアの成長
masuda220
PRO
12
1.9k
SpringBoot3.4の構造化ログ #kanjava
irof
3
1k
時計仕掛けのCompose
mkeeda
1
300
楽しく向き合う例外対応
okutsu
0
250
動作確認やテストで漏れがちな観点3選
starfish719
6
1k
お前もAI鬼にならないか?👹Bolt & Cursor & Supabase & Vercelで人間をやめるぞ、ジョジョー!👺
taishiyade
7
4.1k
Java Webフレームワークの現状 / java web framework at burikaigi
kishida
9
2.2k
How mixi2 Uses TiDB for SNS Scalability and Performance
kanmo
38
15k
PHPカンファレンス名古屋2025 タスク分解の試行錯誤〜レビュー負荷を下げるために〜
soichi
1
280
社内フレームワークとその依存性解決 / in-house framework and its dependency management
vvakame
1
560
Featured
See All Featured
What's in a price? How to price your products and services
michaelherold
244
12k
Statistics for Hackers
jakevdp
797
220k
Build The Right Thing And Hit Your Dates
maggiecrowley
34
2.5k
Being A Developer After 40
akosma
89
590k
Refactoring Trust on Your Teams (GOTO; Chicago 2020)
rmw
33
2.8k
RailsConf 2023
tenderlove
29
1k
The Power of CSS Pseudo Elements
geoffreycrofte
75
5.5k
Fontdeck: Realign not Redesign
paulrobertlloyd
83
5.4k
How to Ace a Technical Interview
jacobian
276
23k
Making Projects Easy
brettharned
116
6k
Done Done
chrislema
182
16k
The Straight Up "How To Draw Better" Workshop
denniskardys
232
140k
Transcript
Rails6.0 Ͱͷෳ DB ରԠ Ebisu.rb #24
@yutadayo • ງҪ ༤ଠ • Ebisu.rb ͷΦʔΨφΠβʔ͍ͯ͠·͢ • ANGEL PORTʢhttps://angl.jpʣͱ͍
͏αʔϏεΛ࡞͍ͬͯ·͢
ࠓ͢͜ͱ ɾRails 6.0.0.rc2 ͕ 7/22 ʹϦϦʔε ɾMultiple Databases αϙʔτͷհ
https://edgeguides.rubyonrails.org/active_record_multiple_databases.html
Ұൠతͳ Master / Slave ߏͷDB .BTUFS %# 3FQMJDB %# "QQ
ϨϓϦέʔγϣϯ 8SJUF3FBE 3FBE0OMZ
• switch_point • https://github.com/eagletmt/switch_point • Octopus • https://github.com/thiagopradi/octopus • multi_db
• https://github.com/schoefmann/multi_db ෳDBΛѻ͏ gems
• ෳͷ Primary DB ͱͦΕͧΕʹରԠ͢Δ Replica DB • ՔಇதͷϞσϧͰͷࣗಈଓΓସ͑ •
HTTPಈࢺɺۙͷॻ͖ࠐΈʹԠͨ͡ Primary ͱ Replica ͷ ࣗಈΓସ͑ • ෳDBͷ࡞ɾআɾϚΠάϨʔγϣϯૢ࡞Λߦ͏ Rails Task αϙʔτ͞ΕΔ༰
• γϟʔσΟϯά • ΫϥελΛ·͕ͨΔJoinจͷൃߦ • Replica DB ͷϩʔυόϥϯγϯά • ෳDB༻ͷ
schema cache ͷ Dumping ݱ࣌Ͱαϙʔτ͞Εͳ͍༰
production: primary: database: primary_db user: root adapter: mysql primary_replica: database:
secondary_db user: root_readonly adapter: mysql replica: true animals: database: animals_db user: root adapter: mysql migrations_paths: db/animals_migrate animals_replica: database: animals_secondary_db user: root_readonly adapter: mysql replica: true ෳDB ͱ Replica ͷઃఆ
• Replica DB ʹ replica: true Λઃఆ͢Δ • ৽͘͠Ճͨ͠ DB
ʹϚΠάϨʔγϣϯϑΝΠϧஔ͖ ͷ migrations_paths Λઃఆ͢Δ • ΨΠυϥΠϯʹ replica primary ͱಉ͡DB໊ͰϢʔ βʔΛ͚Δ͖ͱ͋Δ͕ɺผDBͳ͘ઃఆͰ͖Δ ཁ
ϞσϧͰͷࢦఆ class AnimalsBase < ApplicationRecord self.abstract_class = true connects_to database:
{ writing: :animals, reading: :animals_replica } end class ApplicationRecord < ActiveRecord::Base self.abstract_class = true connects_to database: { writing: :primary, reading: :primary_replica } end ֤Ϟσϧຖʹ্هͷઃఆΛߦ͏͜ͱͰ͖Δ͕ɺυΩϡϝϯτ Ͱ୯ҰͷϞσϧʹઃఆΛهࡌ͠ɺͦΕΛܧঝ͢Δ͜ͱΛਪ ※ DB ଓ࣌ʹϞσϧͷΫϥε໊ຖʹίωΫγϣϯpool Λ࡞Δ ͷͰɺDB ΫϥΠΞϯτͷଓΛফඅͯ͠͠·͏
$ rails -T rails db:create rails db:create:animals Rails db:create:primary rails
db:drop rails db:drop:animals Rails db:drop:primary rails db:migrate rails db:migrate:animals Rails db:migrate:primary Rails db:migrate:status Rails db:migrate:status:animals Rails db:migrate:status:primary Migrations
• ैདྷͷ rails db:create Ͱ primary ͱ animals ྆DB࡞͞Ε Δ
• rails db:create:animals ͰࢦఆͷDBͷ࡞Մೳ • migrations_paths ͷϑΥϧμ໊ʹDB໊Λ prefix ʹ͚ͭΔ ͖ • ͚ͳͯ͘ɺࢦఆ͞Ε͍ͯΕͳ͍Α͏Ͱ͢ ཁ
• rails db:create Ͱ replica: true ͷDB࡞͞Ε ͳ͍ • rails
db:create:primary_replica ΤϥʔʹͳΔ • ಉ༷ʹෳDBͷઃఆ͕ͳ͍ database.yml Ͱ rails db:create:primary ΤϥʔʹͳΔ μϝͩͬͨ͜ͱ
ଓͷΓସ͑ʢΦʔτฤʣ config.active_record.database_selector = { delay: 2.seconds } config.active_record.database_resolver = ActiveRecord::Middleware::DatabaseSelector::Resolver
config.active_record.database_resolver_context = ActiveRecord::Middleware::DatabaseSelector::Resolver::Session application.rb ʹ্هઃఆΛՃ͢Δ͚ͩ
• POST / PUT / DELETE / PATCH ͷϦΫΤετ primary
• ॻ͖ࠐΈޙɺdelayʢσϑΥϧτ2ඵʣؒ primary ͰҎ߱ replica • GET / HEAD delay ΑΓલʹॻ͖ࠐΈ͕ͳ͍߹ replica • ࣮ΛΈΔͱ session[:last_write] ͱϦΫΤετ࣌ࠁͷ͕ࠩ delay Λա͍͗ͯͳ͍͔νΣοΫ͢Δ͚ͩͷγϯϓϧͳ࣮ ཁ
ଓͷΓସ͑ʢϚχϡΞϧฤʣ ActiveRecord::Base.connected_to(role: :reading) do # do something end ίʔυϒϩοΫͰɺroleΛࢦఆͯ͠ɺΫΤϦΛൃߦ͢Δ ActiveRecord::Base.
connected_to(database: { reading_slow: :slow_replica }) do # do something end database.yml ʹఆ͕ٛ͋Εɺผͷ database ҾΛࢦఆՄೳ
• γϯϓϧʹ Write master Read replica ͷέʔεͰେม༗
ޮɺطଘͷgem٫νϟϯε • ෳDB Ͱͷ Migration όονϦαϙʔτ • Slave ͷ όϥϯγϯάαϙʔτ֎ͳͷͰɺෳ replica ͕͋Δ߹ผ ͷػߏ͕ඞཁ • RDS Auroraͷ߹ΫϥελʔΤϯυϙΠϯτΛࢦఆ͓͚ͯ͠ྑ͞ ͦ͏ ·ͱΊ