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
The 12Factor App
Search
Damien Mathieu
October 30, 2014
Programming
1
970
The 12Factor App
Damien Mathieu
October 30, 2014
Tweet
Share
More Decks by Damien Mathieu
See All by Damien Mathieu
Open-source sans Burn Out ? Le modèle CNCF
dmathieu
0
40
Let's deploy on fridays
dmathieu
0
210
Building Resilient Services
dmathieu
0
140
Easily monitor your product data
dmathieu
0
49
Play with ruby threads
dmathieu
2
120
Other Decks in Programming
See All in Programming
monorepo の Go テストをはやくした〜い!~最小の依存解決への道のり~ / faster-testing-of-monorepos
convto
2
500
CSC305 Lecture 08
javiergs
PRO
0
220
他言語経験者が Golangci-lint を最初のコーディングメンターにした話 / How Golangci-lint Became My First Coding Mentor: A Story from a Polyglot Programmer
uma31
0
200
SwiftDataを使って10万件のデータを読み書きする
akidon0000
0
150
Go言語の特性を活かした公式MCP SDKの設計
hond0413
1
240
なぜGoのジェネリクスはこの形なのか? Featherweight Goが明かす設計の核心
ryotaros
7
1.1k
ソフトウェア設計の実践的な考え方
masuda220
PRO
4
600
bootcamp2025_バックエンド研修_WebAPIサーバ作成.pdf
geniee_inc
0
110
CSC509 Lecture 05
javiergs
PRO
0
300
Android16 Migration Stories ~Building a Pattern for Android OS upgrades~
reoandroider
0
120
詳しくない分野でのVibe Codingで困ったことと学び/vibe-coding-in-unfamiliar-area
shibayu36
3
5.1k
Range on Rails ―「多重範囲型」という新たな選択肢が、複雑ロジックを劇的にシンプルにしたワケ
rizap_tech
0
6.7k
Featured
See All Featured
Reflections from 52 weeks, 52 projects
jeffersonlam
353
21k
Templates, Plugins, & Blocks: Oh My! Creating the theme that thinks of everything
marktimemedia
31
2.5k
Context Engineering - Making Every Token Count
addyosmani
7
260
[Rails World 2023 - Day 1 Closing Keynote] - The Magic of Rails
eileencodes
37
2.6k
Understanding Cognitive Biases in Performance Measurement
bluesmoon
31
2.7k
Designing Dashboards & Data Visualisations in Web Apps
destraynor
231
53k
Why Our Code Smells
bkeepers
PRO
340
57k
Agile that works and the tools we love
rasmusluckow
331
21k
Fireside Chat
paigeccino
40
3.7k
Dealing with People You Can't Stand - Big Design 2015
cassininazir
367
27k
Balancing Empowerment & Direction
lara
5
690
CSS Pre-Processors: Stylus, Less & Sass
bermonpainter
359
30k
Transcript
@dmathieu Software Engineer @heroku The 12Factor App 1
Twelve Factor • Can apply to any language and platform!
• Speeds up deployment! • Makes scaling easier! • Keeps apps clean 2
Let’s take a look 3
One codebase to rule them all 4
Codebase Production Staging Feature A Feature B 5
6 Multiple codebases is a distributed system
7 Create libraries
Explicitly declare and isolate dependencies 8
9 source 'https://rubygems.org' ! ruby '2.1.3' ! gem 'rails' gem
'pg' gem 'puma'
10
11 curl imagemagick
12 Config never goes in source control
Config Resource strings to databases Credentials to S3, Facebook, Twitter,
… Security Tokens 13
$ cat .env! AWS_TOKEN=QWERTYUIOP! AWS_SECRET=12345 ! GITHUB_APP_ID=1! GITHUB_SECRET=67890 14
$ foreman run rails console! >> puts ENV[‘AWS_TOKEN’]! > “QWERTYUIOP”
15
You can use a yml config file* *Just don’t store
it in source control
Treat backing services as attached resources 17
18 DATABASE_URL= postgres://example.com:5032
Production deploy PostgreSQL Email Service Amazon S3
20 One codebase per app Explicitly declare and isolate dependencies
Don’t put config in source control Treat backing services as attached resources
Build Release Run 21
Codebase Build Run Config 22
Codebase Build Run Config 23
Execute the app as one or more stateless processes 24
web.1 web.2 Database 25
26 No sticky sessions
27 Ephemeral filesystem
28 Export services via port binding
29 Self-contained app
30 An app can be the backing service for an
other
Scale out via the process model 31
web.1 web.2 web.3 worker.1 worker.2 clock.1 32
33 You can still do your own internal multiplexing
34 Build, release, run One or more stateless processes Scale
out via the process model Export services via port binding
Maximize robustness with fast startup and graceful shutdown 35
36 Handle a request
37 60s to boot is a lot
38 Use the SIGTERM signal
39 Send jobs back to the queue
40 Build, release, run One or more stateless processes Scale
out via the process model Fast startup
Keep development, staging, and production as similar as possible 41
42 Use the same kind of machine
43 With the same OS version
44 And the same database server
Logging 45
46 Production errors will happen
47 Tail logs to find the cause
48 Then use a logging service to dig in deeper
action=create_user
[email protected]
action=log_user
[email protected]
49
count#api-call-200=1 50
Don’t write logs to a file 51
Run admin/ management tasks as one-off processes 52
53 Not in your app’s main processes
54 Run console instances the same way
55 Keep all your environments as similar as possible Run
management tasks as one-off processes Logging
Do you like? • Minimizing new developer overhead?! • Running
in multiple environments?! • Easily scaling without tooling, architecture or development headaches?! • Having the latest update available to users at a moments notice? Read more at 12factor.net 56
Questions?
[email protected]
12factor.net 57 @dmathieu