The document provides an overview of Nginx as a fast and easy-to-configure HTTP and reverse proxy server, alongside UWSGI as a flexible WSGI-compatible server. It describes how to create a simple application using the Bottle microframework and outlines installation steps for UWSGI with configuration examples for both UWSGI and Nginx. The document also includes brief explanations of their roles in application management and request handling.

2. What is nginx
 HTTP and reverse proxy server
 Event driven
 Very fast
 Easy to configure

3. What is uWSGI
 WSGI compatible server
 VERY flexible
 Little overhead
 Compatible with many frameworks like: bottle, flask,
django, …

4. What is bottle
 Bottle is a fast, simple and lightweight WSGI web
microframework
 No additional dependencies
 Uses decorators: @route, @get, @post, etc…

5. Bottle Hello World
 mkdir –p /opt/uwsgiApps/apps/
 cd /opt/uwsgiApps/apps/
 virtualenv bottle-hello
 cd bottle-hello
 pip install bottle

6. Bottle Hello World
 vi bottle-hello.py:
from bottle import route, run
@route('/hello')
def hello():
return "Hello World!"
if __name__ == '__main__':
run(port=8080, debug=True)
else:
application = app

7. Bottle Hello World
 python bottle-hello.py
 Try to access http://localhost:8080/

8. Bottle Hello World v2
 Add this (after the initial imports) to bottle-hello.py:
from bottle import template
@route('/hello/<name>')
def greet(name='Stranger'):
return template('Hello {{name}}, how are you?', name=name)
 python bottle-hello.py
 Try to access http://localhost:8080/hello/yourname

9. uWSGI installation
 pip install uwsgi
 vi /etc/init/uwsgi.conf:
# uWSGI - manage uWSGI application server
description "uWSGI Emperor"
start on (filesystem and net-device-up IFACE=lo)
stop on runlevel [!2345]
respawn
env LOGTO=/var/log/uwsgi/uwsgi.log
env BINPATH=/usr/local/bin/uwsgi
exec $BINPATH --emperor /opt/uwsgiApps/conf.d/ --logto $LOGTO

10. uWSGI emperor
 One of many uWSGI configuration options
 One master process
 Many independent child processes
 Each application has a config file
 Touch or modify the config file to restart the
application

11. uWSGI example config
 vi /opt/uwsgiapps/conf.d/bottle-hello.xml:
<uwsgi>
<master>true</master>
<processes>1</processes>
<vaccum>true</vaccum>
<chmod-socket>600</chmod-socket>
<socket>/tmp/%n.sock</socket>
<uid>www-data</uid>
<gid>www-data</gid>
<pythonpath>/opt/uwsgiApps/apps/%n/src/</pythonpath>
<module>scatterapp</module>
</uwsgi>

12. nginx configuration
 vi /etc/nginx/conf.d/subdomain1.domain.com.conf:
server {
listen 80;
server_name subdomain1.domain.com.conf;
location / {
include uwsgi_params;
uwsgi_pass unix://tmp/bottle-example.py;
}
}

13. System overview

nginx acts as a reverse proxy

nginx redirects the requests based on the domain name or any other
parameter (ip address, url path, cookies, etc)

uWSGI starts and stops the applications

bottle is used to program the application

14. Questions

15. Links
 http://nginx.org/
 http://uwsgi-docs.readthedocs.org/
 http://bottlepy.org/