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12 Factor App
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Craig Kerstiens
June 28, 2012
Programming
12
1.1k
12 Factor App
12 Factor Application talk given at Cloud East
Craig Kerstiens
June 28, 2012
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Transcript
12 Factor App
Craig Kerstiens @craigkerstiens work at @heroku
First Some History
Where We’ve Been Version Control | Dependency Management | Build
Release
Where We’ve Been Version Control | Dependency Management | Build
Release Folders
Where We’ve Been Version Control | Dependency Management | Build
Release Folders SVN,Perforce,Source Safe
Where We’ve Been Version Control | Dependency Management | Build
Release Folders SVN,Perforce,Source Safe Git,Mercurial
Version Control | Dependency Management | Build Release Now
Version Control | Dependency Management | Build Release Now 1
Code base Many deploys
Version Control | Dependency Management | Build Release Now 1
Code base Many deploys
Version Control | Dependency Management | Build Release Now 1
Code base Many deploys
Version Control | Dependency Management | Build Release Where We’ve
Been
Version Control | Dependency Management | Build Release Where We’ve
Been $ python setup.py install $ ruby setup.rb install
Version Control | Dependency Management | Build Release Where We’ve
Been $ python setup.py install $ ruby setup.rb install $ INSTALL FROM SOURCE
Version Control | Dependency Management | Build Release Now
Version Control | Dependency Management | Build Release $ pip
install -r requirements.txt $ bundle install Now
Version Control | Dependency Management | Build Release $ pip
install -r requirements.txt $ bundle install Now $ INSTALL PINNED VERSIONS
Version Control | Dependency Management | Build Release Where We’ve
Been
$ rsync myproject tomyserver Version Control | Dependency Management |
Build Release Where We’ve Been
Version Control | Dependency Management | Build Release Now
Version Control | Dependency Management | Build Release Now
Version Control | Dependency Management | Build Release Now
Enough History
12 Factor
Declarative Setup - Minimize Setup Time 12 Factor
Declarative Setup - Minimize Setup Time Clean Contracts - Portability
12 Factor
Declarative Setup - Minimize Setup Time Clean Contracts - Portability
Deploy Practices - Cloud and horizontal scaling 12 Factor
Declarative Setup - Minimize Setup Time Clean Contracts - Portability
Deploy Practices - Cloud and horizontal scaling Minimize Divergence - Continuous Deployment 12 Factor
Dev-Prod Parity Dev Prod Parity | Config | Concurrency |
Backing Services | Logs
dev Dev-Prod Parity Dev Prod Parity | Config | Concurrency
| Backing Services | Logs
dev = staging Dev-Prod Parity Dev Prod Parity | Config
| Concurrency | Backing Services | Logs
dev = staging = prod Dev-Prod Parity Dev Prod Parity
| Config | Concurrency | Backing Services | Logs
dev = staging = prod sqlite postgres postgres Dev-Prod Parity
Dev Prod Parity | Config | Concurrency | Backing Services | Logs
dev = staging = prod sqlite postgres postgres Dev-Prod Parity
Dev Prod Parity | Config | Concurrency | Backing Services | Logs ≠ ≠
dev = staging = prod sqlite postgres postgres postgres =
postgres = postgres Dev-Prod Parity Dev Prod Parity | Config | Concurrency | Backing Services | Logs ≠ ≠
Config Dev Prod Parity | Config | Concurrency | Backing
Services | Logs
Config var server=”servername” var username=”username” var password=”password” var dbname =
“dname” Dev Prod Parity | Config | Concurrency | Backing Services | Logs
Config Dev Prod Parity | Config | Concurrency | Backing
Services | Logs
Config (External to your code) Dev Prod Parity | Config
| Concurrency | Backing Services | Logs
Config (External to your code) var server=ENV[‘server’] var username=ENV[‘username’] var
password=ENV[‘password’] var dbname = ENV[‘dbname’] Dev Prod Parity | Config | Concurrency | Backing Services | Logs
Processes Dev Prod Parity | Config | Concurrency | Backing
Services | Logs
web.1 Processes Dev Prod Parity | Config | Concurrency |
Backing Services | Logs
web.1 web.2 Processes Dev Prod Parity | Config | Concurrency
| Backing Services | Logs
web.1 web.2 Scale Processes Dev Prod Parity | Config |
Concurrency | Backing Services | Logs
web.1 web.2 worker.1 clock.1 Workload Diversity Scale Processes Dev Prod
Parity | Config | Concurrency | Backing Services | Logs
web.1 web.2 worker.1 worker.2 worker.3 worker.4 clock.1 Workload Diversity Scale
Processes Dev Prod Parity | Config | Concurrency | Backing Services | Logs
Backing Services Dev Prod Parity | Config | Concurrency |
Backing Services | Logs
Backing Services Dev Prod Parity | Config | Concurrency |
Backing Services | Logs Stateless Processes
Backing Services Dev Prod Parity | Config | Concurrency |
Backing Services | Logs Stateless Processes External Config
Backing Services Dev Prod Parity | Config | Concurrency |
Backing Services | Logs Stateless Processes External Config DATABASE_URL=postgres://username:pass@host/db MEMCACHE_URL=username:pass@host/db
Logs Dev Prod Parity | Config | Concurrency | Backing
Services | Logs
How we use logs $ ssh tomyserver $ cat access_log
Logs Dev Prod Parity | Config | Concurrency | Backing Services | Logs
How we use logs $ ssh tomyserver $ cat access_log
How we perceive logs $ tail -f access_log Logs Dev Prod Parity | Config | Concurrency | Backing Services | Logs
Logs Dev Prod Parity | Config | Concurrency | Backing
Services | Logs
DB Logs Dev Prod Parity | Config | Concurrency |
Backing Services | Logs
DB Web Logs Dev Prod Parity | Config | Concurrency
| Backing Services | Logs
DB Web Worker Logs Dev Prod Parity | Config |
Concurrency | Backing Services | Logs
Event Stream DB Web Worker Logs Dev Prod Parity |
Config | Concurrency | Backing Services | Logs
Event Stream 2012-02-22T19:56:40+00:00 [postgres]: .... 2012-02-22T19:56:40+00:00 [router]: GET mysite.com/ ...
2012-02-22T19:56:40+00:00 [nginx]: .... 2012-02-22T19:56:40+00:00 [worker]: .... DB Web Worker Logs Dev Prod Parity | Config | Concurrency | Backing Services | Logs
12 Factor
Declarative Setup Clean Contracts Deploy Practices Minimize Divergence 12 Factor
Fin. Resources http://craigkerstiens.com http://speakerdeck.com/u/craigkerstiens http://www.12factor.net