Two Scoops of Django Best Practices for Django 1.6 Ch.27 Deployment: Platforms as a Service Ch.28 Deploying Django Project

1. Best Practices for Django 1.6
TWO SCOOPS OF DJANGO
Ch.27 Deployment: Platforms as a Service
Ch.28 Deploying Django Project
Michelle Leu @flywindy
2015/07/14

2. ABOUT THIS BOOK
• Not really for new comer
• Author:
• Daniel Greenfeld &
Audrey Roy
• Django Packages
Website
• New version for Django 1.8
2

3. DEPLOYMENT
3
Platform as a Service (PaaS)

4. CLOUD SERVICE
4
Build Deploy Buy

5. EVALUATION
5
Compliance SSL/HTTPS, PCI Level 1 SSL/HTTPS
Pricing
(Free Limit)
Sleeps after 30 mins of inactivity
Must sleep 6 hours in a 24 hour period
one app, no custom domain, one
app, MySQL.
Uptime 99.99x% ?
Staffing 24×7×365 (free in business hour) forums, stackoverflow
Scaling From command line / dashboard By switch diff pricing plan
Documentation Step by step tutorial (1.7) Wiki, Django 1.3
Performance 512 RAM, sleep 6hrs / day (free) low bandwidth, CPU allowance (free)
Geography United States or Europe Amazon's us-east-1c
Company stability
Founded in 2007, acquired by
Salesforce.com in 2010
PythonAnywhere LLP (2012)

6. LIVE DEMO ♥
6

7. 7
• Project Layout
• Create Heroku app
• Setup environment variables
• Git push
• Django migrate

8. 8
• Project Layout
• Open Bash console
• git clone, creating a virtualenv and pip install
• Setup environment variable
• Setup static files
• WSGI Settings

9. SUMMARY
9
Limit of app 5 1
Database PostgresSQL sqlite3, MySQL
Custom domain ✓ ✗ (only username)
Sleeping Sleeping at least 6hrs / day No sleeping
Scheduled tasks Heroku Scheduler (Unlimited) 1 daily task
Logging heroku logs Online log files (access, error, server)
Deployment Command line, more configs Online IDE / Console

10. DEPLOYMENT
10
Single-Server for Small Projects

11. SINGLE-SERVER FOR SMALL PROJECTS
11
HTTP +
WSGI App
server
Process
Manager
DB Server
1. Nginx + uWSGI
2. Nginx + Gunicorn
3. Apache + mod_wsgi
1. Supervisord
2. init scripts
1. PostgresSQL
2. MySQL

12. DEPLOYMENT
12
Multi-Server for Medium to Large Projects

13. MULTI-SERVER FOR MEDIUM TO LARGE
PROJECTS
13
HTTP +
WSGI App
server
Process
Manager
DB Server
CDN
for static
files
Caching
Server
1. Redis for caching & async message queue
2. Memcached
3. Varnish

14. AUTOMATED, REPEATABLE
DEPLOYMENTS
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15. Remote execution
CURRENT INFRASTRUCTURE AUTOMATION
TOOLS
• Installing packages
• Running commands on remote servers.
• Starting services, and restarting them under
certain conditions.
• logging and returning the response from the
server.
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16. CURRENT INFRASTRUCTURE AUTOMATION
TOOLS
16
Python
Ruby

17. SUMMARY
17
• Single-Server for Small Projects -> PaaS
• Multi-Server for Medium to Large Projects .
• Horizontal vs. Vertical Scaling
• Scaling Horizontally and Sessions

18. REFERENCE
• http://twoscoopspress.org/products/two-scoops-of-django-1-6
• https://devcenter.heroku.com/
• https://www.pythonanywhere.com/wiki/
• http://djangogirlstaipei.gitbooks.io/django-girls-taipei-tutorial/
content/django/deploy.html
• http://tutorial.djangogirls.org/en/deploy/index.html
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19. THANKS FOR YOUR LISTENING