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
540
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
ゼロからはじめる採用広報
yutadayo
4
1.1k
クレジットカードを製造する技術
yutadayo
92
62k
カード発行会社(イシュア)を 支えるシステム解説
yutadayo
4
2.9k
Fintechプロダクトの開発事情とアーキテクチャ解説
yutadayo
2
3.2k
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
105
82k
PCI DSS に準拠したシステム開発
yutadayo
2
1.5k
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
1.9k
Rails Secrets の歴史
yutadayo
0
440
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
Other Decks in Programming
See All in Programming
Goで作る、開発・CI環境
sin392
0
260
Claude Code派?Gemini CLI派? みんなで比較LT会!_20250716
junholee
1
530
Python型ヒント完全ガイド 初心者でも分かる、現代的で実践的な使い方
mickey_kubo
1
240
A full stack side project webapp all in Kotlin (KotlinConf 2025)
dankim
0
150
ご注文の差分はこちらですか? 〜 AWS CDK のいろいろな差分検出と安全なデプロイ
konokenj
3
580
ふつうの技術スタックでアート作品を作ってみる
akira888
1
1.3k
効率的な開発手段として VRTを活用する
ishkawa
0
160
[SRE NEXT] 複雑なシステムにおけるUser Journey SLOの導入
yakenji
0
150
「App Intent」よくわからんけどすごい!
rinngo0302
1
100
はじめてのWeb API体験 ー 飲食店検索アプリを作ろうー
akinko_0915
0
140
AI Agent 時代のソフトウェア開発を支える AWS Cloud Development Kit (CDK)
konokenj
6
800
The Niche of CDK Grant オブジェクトって何者?/the-niche-of-cdk-what-isgrant-object
hassaku63
1
610
Featured
See All Featured
A Modern Web Designer's Workflow
chriscoyier
695
190k
The Art of Delivering Value - GDevCon NA Keynote
reverentgeek
15
1.6k
Exploring the Power of Turbo Streams & Action Cable | RailsConf2023
kevinliebholz
34
5.9k
What's in a price? How to price your products and services
michaelherold
246
12k
Cheating the UX When There Is Nothing More to Optimize - PixelPioneers
stephaniewalter
282
13k
The Straight Up "How To Draw Better" Workshop
denniskardys
235
140k
Site-Speed That Sticks
csswizardry
10
700
How to Create Impact in a Changing Tech Landscape [PerfNow 2023]
tammyeverts
53
2.9k
Helping Users Find Their Own Way: Creating Modern Search Experiences
danielanewman
29
2.7k
ReactJS: Keep Simple. Everything can be a component!
pedronauck
667
120k
No one is an island. Learnings from fostering a developers community.
thoeni
21
3.4k
Designing Dashboards & Data Visualisations in Web Apps
destraynor
231
53k
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